POWER TECHNOLOGIES AND EQUIPMENT ABOUT USHISTORYACTIVITIESGALLERYCONTACT.

POWER TECHNOLOGIES AND EQUIPMENT

ABOUT US HISTORY ACTIVITIES GALLERY CONTACT

ABOUT USABOUT US

ТОТЕМА ТОТЕМА is a power engineering company of long history and technical expertise in the field of technologies and is a power engineering company of long history and technical expertise in the field of technologies and equipment – boilers and the associated ancillary facilities - for district heating, for process steam and steam for power or equipment – boilers and the associated ancillary facilities - for district heating, for process steam and steam for power or cogeneration cycle. The company is a legal successor to the Power Technologies Department of former state-owned cogeneration cycle. The company is a legal successor to the Power Technologies Department of former state-owned enterprise for Automation and Modernisation of Power Infrastructure, dating back to 1967. TOTEMA EOOD is currently a enterprise for Automation and Modernisation of Power Infrastructure, dating back to 1967. TOTEMA EOOD is currently a private company, owned by Energoremont Holding AD.private company, owned by Energoremont Holding AD.

TOTEMA’s core team of engineering professionals has more than TOTEMA’s core team of engineering professionals has more than 20 20 years of experience in:years of experience in:

●● research and consultancy on thermoelectric technologies and equipment research and consultancy on thermoelectric technologies and equipment ●● design of district heating boilers, steam generators, burner systems, heat exchange surfaces as well as design of district heating boilers, steam generators, burner systems, heat exchange surfaces as well as

steam, air and gas ductworksteam, air and gas ductwork;;●● operation and performance guarantee testing of steam generators and the associated equipment;operation and performance guarantee testing of steam generators and the associated equipment;●● engineering analyses;engineering analyses;●● project management.project management.

ТОТЕМА ТОТЕМА aims to provide a complete engineering cycle from assessment and feasibility study through design, aims to provide a complete engineering cycle from assessment and feasibility study through design, manufacturing and assembly supervision to delivery and commissioning on turnkey basis. The company is dedicated to manufacturing and assembly supervision to delivery and commissioning on turnkey basis. The company is dedicated to long-term service of its customerslong-term service of its customers

Most of the equipment designed by TOTEMA is manufactured and assembled by the units of Energoremont, which Most of the equipment designed by TOTEMA is manufactured and assembled by the units of Energoremont, which facilitates supervisionfacilitates supervision

and guarantees quality and due execution of the projects.and guarantees quality and due execution of the projects.

ТОТЕМАТОТЕМА provides solutions which: provides solutions which:- ensure optimum grinding of different types of coal and high efficiency of the mills- ensure optimum grinding of different types of coal and high efficiency of the mills;;- guarantee stable and efficient combustion with low NOx emissions for a wide-range of boiler loads and - guarantee stable and efficient combustion with low NOx emissions for a wide-range of boiler loads and

coal parameterscoal parameters;;- guarantee efficient combustion of fuel oil and natural gas as basic or ignition fuel in modern burner - guarantee efficient combustion of fuel oil and natural gas as basic or ignition fuel in modern burner

systems of excellent systems of excellent safety and reliabilitysafety and reliability;;- prevent boiler parts from high and low temperature corrosion - prevent boiler parts from high and low temperature corrosion - prevent slagging and fouling of boiler furnaces and heat surfaces;- prevent slagging and fouling of boiler furnaces and heat surfaces;- prevent erosion of pulverisers and heat exchange surfaces- prevent erosion of pulverisers and heat exchange surfaces;;- help save high-quality supporting fuel- help save high-quality supporting fuel;;- extend the life of boiler pressure parts- extend the life of boiler pressure parts-- lower on-site electricity consumption. lower on-site electricity consumption.

Based on theoretical, pilot and operational studies and digital process simulations, the company’s team has developed Based on theoretical, pilot and operational studies and digital process simulations, the company’s team has developed for the last 30 years a number design and operation solutions for optimizing different boiler parts operation for most of for the last 30 years a number design and operation solutions for optimizing different boiler parts operation for most of the major power plants in Bulgaria, such as Maritza East 1 TPP, Maritza East 2 TPP, Maritza East 3 TPP, Bobov Dol TPP, the major power plants in Bulgaria, such as Maritza East 1 TPP, Maritza East 2 TPP, Maritza East 3 TPP, Bobov Dol TPP, Varna TPP, Russe East TPP, Deven TPP and a number of thermal power plants abroad, e.g. in Slovakia, Spain, Germany, Varna TPP, Russe East TPP, Deven TPP and a number of thermal power plants abroad, e.g. in Slovakia, Spain, Germany, Romania, Lithuania and recently in Austalia and Indonesia.Romania, Lithuania and recently in Austalia and Indonesia.

TOTEMA has been certified under OHSAS 18001:1999 and ISO 9001:2000 and has excellent references as a reliable TOTEMA has been certified under OHSAS 18001:1999 and ISO 9001:2000 and has excellent references as a reliable partner.partner.

ABOUT USABOUT US

ТОТЕМА ТОТЕМА is a successor of the departments of former Public Enterprise for Automation and Modernization of Power is a successor of the departments of former Public Enterprise for Automation and Modernization of Power Industry providing design, research and development, commissioning and tuning of the equipment. The company has been Industry providing design, research and development, commissioning and tuning of the equipment. The company has been established in the mid 60s together with Energoproject and Energomontazh to service the expanding Power Complex in Bulgaria. The established in the mid 60s together with Energoproject and Energomontazh to service the expanding Power Complex in Bulgaria. The enterprise has undergone a number of transformations as followsenterprise has undergone a number of transformations as follows

1967 г.1967 г. -- Energoremont and EnergomontazhEnergoremont and Energomontazh1967 г.1967 г. -- Automation and Modernization of Power InfrastructureAutomation and Modernization of Power Infrastructure (АМЕС) (АМЕС)1969 г1969 г .-.- Centenergoremont and Automation (CERA)Centenergoremont and Automation (CERA)1975 г.1975 г. -- Public Enterprise ORGRESPublic Enterprise ORGRES1979 г.1979 г. -- Research and Manufacturing Enterprise TechenergoResearch and Manufacturing Enterprise Techenergo1988 г.1988 г. -- R&D centre for Techenergo - Toploenergetica Directorate R&D centre for Techenergo - Toploenergetica Directorate 1990 г.1990 г. -- ТОТЕМАТОТЕМА Company Company1993 г.1993 г. -- ТОТЕМА ЕООТОТЕМА ЕООD with a court decision from July 2, 1992D with a court decision from July 2, 19922004 г.2004 г. -- ТОТЕМА ЕООТОТЕМА ЕООD was acquired by Energoremont Holding under a privatization contract from April 1, 2004 D was acquired by Energoremont Holding under a privatization contract from April 1, 2004

The coal-fired power plants in Bulgaria were built to burn either local low-grade lignite and brown coal e.g Republica The coal-fired power plants in Bulgaria were built to burn either local low-grade lignite and brown coal e.g Republica TPP, Maritza East 1 TPP, Maritza East 2 TPP, Maritza East 3 TPP, Bobov Dol TPP, or semi-anthracite coal of low-volatile content TPP, Maritza East 1 TPP, Maritza East 2 TPP, Maritza East 3 TPP, Bobov Dol TPP, or semi-anthracite coal of low-volatile content imported from Ukraine, e. g. Varna TPP, Russe TPP.imported from Ukraine, e. g. Varna TPP, Russe TPP.

Technologies for burning Ukrainian coal had been well developed by the ex-Soviet Union experts.Technologies for burning Ukrainian coal had been well developed by the ex-Soviet Union experts.

The lignite and brown coal mined in the country in opened and underground pits were of extremely low quality and The lignite and brown coal mined in the country in opened and underground pits were of extremely low quality and were little known both to the established European producers and to the Bulgarian professionals.were little known both to the established European producers and to the Bulgarian professionals.

The efforts to cope with the bad coal and the foreign equipment unfit to its “unique” features created new design and The efforts to cope with the bad coal and the foreign equipment unfit to its “unique” features created new design and technological solutions for coal processing, pulverization and efficient combustion.technological solutions for coal processing, pulverization and efficient combustion.

At the turn of the 70s and 80s At the turn of the 70s and 80s ТОТЕМАТОТЕМА rolled out a technological concept for efficient combustion without slagging of rolled out a technological concept for efficient combustion without slagging of low grade coal, which was further developed and applied later in burning high grade coal with reduced emissions of nitrogen oxides.low grade coal, which was further developed and applied later in burning high grade coal with reduced emissions of nitrogen oxides.

In the 80s In the 80s ТОТЕМАТОТЕМА used the technology to develop combustion systems with pulverized coal concentrators used the technology to develop combustion systems with pulverized coal concentrators , , with a with a staged concentration of the pulverized coal/gas mixture along the height of the burner. The first project was the modification of the staged concentration of the pulverized coal/gas mixture along the height of the burner. The first project was the modification of the pulverized fuel plants of the double - boiler pulverized fuel plants of the double - boiler 150 150 MW units of Maritza East 2 TPP, so that they could burn as received local lignite MW units of Maritza East 2 TPP, so that they could burn as received local lignite directly without pre-drying. Then followed the directly without pre-drying. Then followed the 210 М210 МW units of Rovinari TPP in RomaniaW units of Rovinari TPP in Romania, , the the 110 М110 МW units of Kraiova TPP in Romania W units of Kraiova TPP in Romania and the and the 500 М500 МW units of Hagenwerder TPP in Germany modified for ensuring stable combustion without supporting fuel.W units of Hagenwerder TPP in Germany modified for ensuring stable combustion without supporting fuel.

In In 1986-19891986-1989 the technology was applied for preventing slagging at Puentes TPP in Spain and Novaki TPP in Slovakia. the technology was applied for preventing slagging at Puentes TPP in Spain and Novaki TPP in Slovakia.

The successful application of TOTEMA’s technology at Puentes power plant made a name for the company and it was The successful application of TOTEMA’s technology at Puentes power plant made a name for the company and it was invited to prepare a solution for converting the plant to a new fuel – mixture of local and imported coal from the international market. invited to prepare a solution for converting the plant to a new fuel – mixture of local and imported coal from the international market. Initially, the plant envisaged reconstructing two of the units to burn imported bituminous coal, while the other two continued burning Initially, the plant envisaged reconstructing two of the units to burn imported bituminous coal, while the other two continued burning local lignite. Then local lignite. Then ТОТЕМАТОТЕМА’s team came up with the idea of finding coal with combustion characteristics similar to the ones for which ’s team came up with the idea of finding coal with combustion characteristics similar to the ones for which the plant has been designed and feeding it with a mixture of the two types of coal. That was how the plant has been designed and feeding it with a mixture of the two types of coal. That was how ТОТЕМАТОТЕМА’s professionals came to ’s professionals came to work first with the low-ash, low-sulfur PRB coal of US and then with the envirocoal of ADARO - Indonesiawork first with the low-ash, low-sulfur PRB coal of US and then with the envirocoal of ADARO - Indonesia ..

HISTORYHISTORY

In In 1990 – 1991 1990 – 1991 a TOTEMA’s team took part in the combustion tests on mixtures of PRB and ADARO a TOTEMA’s team took part in the combustion tests on mixtures of PRB and ADARO coal at the Puentes power plant. Then, the new project for burning a mixture of local coal and imported sub-coal at the Puentes power plant. Then, the new project for burning a mixture of local coal and imported sub-bituminous coal was developed with the purpose of lowering sulfur dioxide emissionsbituminous coal was developed with the purpose of lowering sulfur dioxide emissions. . The design of the coal The design of the coal burners and the thermal calculations of the boiler unit in the new conditions were made by TOTEMA in burners and the thermal calculations of the boiler unit in the new conditions were made by TOTEMA in 1991-19931991-1993..

The good results attained from burning mixtures of lignite and sub-bituminous coal with high-volatile The good results attained from burning mixtures of lignite and sub-bituminous coal with high-volatile content in tangentialcontent in tangential fired system pulverizing the coal with fan mills in the Puentes power plant encouraged fired system pulverizing the coal with fan mills in the Puentes power plant encouraged ТОТЕМАТОТЕМА’s professionals to implement the solution at some Bulgarian plants with similar problems’s professionals to implement the solution at some Bulgarian plants with similar problems – – Bobov Dol TPP, Bobov Dol TPP, Maritza East 3 TPP in Dimitrovgrad, where some coal from ADARO and Russia was delivered. The tests were Maritza East 3 TPP in Dimitrovgrad, where some coal from ADARO and Russia was delivered. The tests were successful, but the combustion of blended mixture of local and imported coal was not implemented on a long-term successful, but the combustion of blended mixture of local and imported coal was not implemented on a long-term basis.basis.

In In 19919922 – 199 – 1993 a TOTEMA team took part in the development of a major project for the rehabilitation 3 a TOTEMA team took part in the development of a major project for the rehabilitation of the energy complex in Bulgaria as a subcontractor of Overseas Bechtel Inc.- USA. Then TOTEMA’s team brought of the energy complex in Bulgaria as a subcontractor of Overseas Bechtel Inc.- USA. Then TOTEMA’s team brought up the suggestion of the conversion of the Bulgarian power plants Varna TPP and Russe TPP to a new fuel – up the suggestion of the conversion of the Bulgarian power plants Varna TPP and Russe TPP to a new fuel – imported coal from the international coal market. The proposal for Bobov Dol TPP was to be converted to burning imported coal from the international coal market. The proposal for Bobov Dol TPP was to be converted to burning mixtures of local and imported coal.mixtures of local and imported coal.

Later, Later, ТОТЕМАТОТЕМА’s experts developed a conceptual, technical and economic assessment of these ’s experts developed a conceptual, technical and economic assessment of these alternatives for Varna TPP and Russe TPP, preparing a study on the supply of such coal jointly with alternatives for Varna TPP and Russe TPP, preparing a study on the supply of such coal jointly with ЕЕRC ЕЕRC - UK- UK. . The The proposed solution ensures at a relatively small cost regular supplies of imported fuel and solving the environmental proposed solution ensures at a relatively small cost regular supplies of imported fuel and solving the environmental issues of NOx and SOissues of NOx and SO22 emissions. The proposed combustion technology was that of TOTEMA, but in that case emissions. The proposed combustion technology was that of TOTEMA, but in that case milling was realized with medium speed pulverizers. The idea was approved by the international experts, but has milling was realized with medium speed pulverizers. The idea was approved by the international experts, but has not been realized.not been realized.

In the last 10 years, having sufficient experience in the efficient utilization of low grade coal, TOTEMA’s In the last 10 years, having sufficient experience in the efficient utilization of low grade coal, TOTEMA’s engineering professionals have taken part in the rehabilitation of the boilers in the biggest power plant on the engineering professionals have taken part in the rehabilitation of the boilers in the biggest power plant on the Balkan Peninsula – Bulgarian Maritsa East 2 TPP.Balkan Peninsula – Bulgarian Maritsa East 2 TPP.

ТОТЕМАТОТЕМА’s scope of services in that project included:’s scope of services in that project included:-- delivery of new pulverized coal combustion systems for the delivery of new pulverized coal combustion systems for the П 62П 62 boilers; boilers;-- delivery of new membrane water walls for the delivery of new membrane water walls for the П 62П 62 boilers boilers;;- - delivery of new pulverized coal combustion systems for once through delivery of new pulverized coal combustion systems for once through ПК 38-4ПК 38-4 boilers boilers;;--delivery of new steam reheaters for the delivery of new steam reheaters for the ПК 38-4ПК 38-4 boilers boilers;;- - upgrade of the air ductwork of the upgrade of the air ductwork of the ПК 38-4ПК 38-4 boilers boilers..The project aims to achieve stable combustion and slag-free operation of the furnace at increased The project aims to achieve stable combustion and slag-free operation of the furnace at increased

heat generation. For the implementation of its technological solutions heat generation. For the implementation of its technological solutions ТОТЕМА ТОТЕМА worked jointly with the Thermal worked jointly with the Thermal Power department of the Technical University of SofiaPower department of the Technical University of Sofia, , where three-dimensional models of where three-dimensional models of П 62 П 62 andand ПК 38- ПК 38-4.4.boilers have been made on assignment by the company. The operation characteristics of the rehabilitated in boilers have been made on assignment by the company. The operation characteristics of the rehabilitated in 2000-2001 2000-2001 two two 210 MW 210 MW units and in units and in 2006-2002006-2009 four9 four 150 MW 150 MW units are very good.units are very good.

Evidence of the successful implementation of TOTEMA’s technologies for low-volatileEvidence of the successful implementation of TOTEMA’s technologies for low-volatile, , high-grade coal high-grade coal combustion in a wet bottom furnacecombustion in a wet bottom furnace, , with lower Nwith lower NООx emissions, is the modernisation of tx emissions, is the modernisation of two boilers with a capacity wo boilers with a capacity of of 160 160 tt//h at the Deven TPP, owned by Belgian soda ash producer Solvayh at the Deven TPP, owned by Belgian soda ash producer Solvay.. Along with the replacement of the Along with the replacement of the combustion system, the company upgraded the adjacent part of the furnace chamber mounting membrane water combustion system, the company upgraded the adjacent part of the furnace chamber mounting membrane water wallswalls..

History-History-continuationcontinuation

DESIGN, DELIVERY AND COMMISSIONONG OF TECHNOLOGIES AND EQUIPMENT FOR:DESIGN, DELIVERY AND COMMISSIONONG OF TECHNOLOGIES AND EQUIPMENT FOR:● ● pulverizing and combustion of coal of different gradespulverizing and combustion of coal of different grades;;● ● combustion of fuel oil and natural gascombustion of fuel oil and natural gas;;● ● modernization of heat-exchange surfaces.modernization of heat-exchange surfaces.

ENGINEERING ASSESSMENT AND OPTIMIZATION OF:ENGINEERING ASSESSMENT AND OPTIMIZATION OF:● ● boiler equipmentboiler equipment;;● ● operation of steam generators and district heating boileroperation of steam generators and district heating boiler;;● ● technical and economic parameters of power plantstechnical and economic parameters of power plants..

DEVELOPING OF OWN SOFTWARE PRODUCTS FOR:DEVELOPING OF OWN SOFTWARE PRODUCTS FOR:● ● calculating the heat transfer in the furnace chamber and the following heat exchangecalculating the heat transfer in the furnace chamber and the following heat exchange surfaces;surfaces;● ● calculating the heat balance of steam generators and district heating boilers fired with solid, calculating the heat balance of steam generators and district heating boilers fired with solid, liquid or gasliquid or gas fuel;fuel;● ● calculating the heat and mass balance of pulverizing systemscalculating the heat and mass balance of pulverizing systems

RESEARCH, CONSULTANCY AND TECHNICAL ASSISTANCERESEARCH, CONSULTANCY AND TECHNICAL ASSISTANCEfor solving problems related tofor solving problems related to::● ● deterioration or shortage of the design fuelsdeterioration or shortage of the design fuels;;● ● emissions of sulfur oxides, nitrogen oxides and ashemissions of sulfur oxides, nitrogen oxides and ash;;● ● wearing and corrosion of the heat exchange surfaceswearing and corrosion of the heat exchange surfaces;;● ● low and high temperature foulinglow and high temperature fouling;;● ● rehabilitation of the power plants and extension of the life of outdated power equipment;rehabilitation of the power plants and extension of the life of outdated power equipment;whilewhile● ● building new and upgrading existing installations;building new and upgrading existing installations;● ● tuning pulverizing and combustion equipmenttuning pulverizing and combustion equipment;;● ● making performance guarantee testsmaking performance guarantee tests..

ACTIVITIESACTIVITIES

TECHNOLOGIES AND EQUIPMENT

REFERENCES DEVELOPING OF OWN

SOFTWARE PRODUCTS

TOTEMA’S TECHNOLOGY

RESEARCH CONSULTANCY

AND TECHNICAL ASSISTANCE

INTERNACIONAL PARTNERSHIP

TOTEMA’S TECHNOLOGYTOTEMA’S TECHNOLOGY

FOR EFFICIENT FIRING OF PULVERISED COAL MINIMIZING NITROGEN OXIDES FORMATION IN FOR EFFICIENT FIRING OF PULVERISED COAL MINIMIZING NITROGEN OXIDES FORMATION IN TANGENTIALLY-FIRED BOILERSTANGENTIALLY-FIRED BOILERS

The technology is based on the common, widely used by EVTThe technology is based on the common, widely used by EVT, , Combustion EngineeringCombustion Engineering, , Alstom and Alstom and Russian boiler manufacturers - Podolsk and BKZ tangential firing with jet burners. The key advantage of the Russian boiler manufacturers - Podolsk and BKZ tangential firing with jet burners. The key advantage of the tangentially fired system is the single rotating flame ball in the centre of the furnace, which gives out heat uniformly tangentially fired system is the single rotating flame ball in the centre of the furnace, which gives out heat uniformly independent of the fuel-air proportion in the different burners.independent of the fuel-air proportion in the different burners.

ТОТЕМАТОТЕМА’s contribution is in’s contribution is in::

●● staged feeding of pulverized coal into the combustion chamber with a decreasing concentration staged feeding of pulverized coal into the combustion chamber with a decreasing concentration gradient at an appropriate continuously growing outflow velocity of the pulverized coal/gas mixture along the height gradient at an appropriate continuously growing outflow velocity of the pulverized coal/gas mixture along the height of the burner.of the burner.

●● uniform distribution of combustion air along all the burners independent of whether they are in uniform distribution of combustion air along all the burners independent of whether they are in operation or not;operation or not;

●● staged feeding of combustion air so that temperatures in the combustion area remain constant and staged feeding of combustion air so that temperatures in the combustion area remain constant and relatively low to ensure combustion with low emissions of nitrogen oxides.relatively low to ensure combustion with low emissions of nitrogen oxides.

●● selection of an appropriate, high-enough outflow velocity of the secondary air in order to maintain the selection of an appropriate, high-enough outflow velocity of the secondary air in order to maintain the optimum aerodynamics in the furnace.optimum aerodynamics in the furnace.

To ensure the required distribution, the pulverized coal should be of adequate particle size – much To ensure the required distribution, the pulverized coal should be of adequate particle size – much coarser than the usually fed. It is achieved by using fan mills for grinding with flue gas for drying and transportation coarser than the usually fed. It is achieved by using fan mills for grinding with flue gas for drying and transportation and inertial classifiers, regulating the size or degree of fineness of the finished product. After the classifier the and inertial classifiers, regulating the size or degree of fineness of the finished product. After the classifier the coal/gas-mixture is fed to a centrifugal (swirl) pulverized coal concentrator. The concentration and the size of the coal/gas-mixture is fed to a centrifugal (swirl) pulverized coal concentrator. The concentration and the size of the fuel particles decrease from the periphery to the center of the cylinder after the swirl concentrator. Feeding the fuel particles decrease from the periphery to the center of the cylinder after the swirl concentrator. Feeding the pulverized fuel-gas mixture from the outward annulus to the lowest finger of the burner, from the next annulus to pulverized fuel-gas mixture from the outward annulus to the lowest finger of the burner, from the next annulus to the second finger and further to the third, fourth etc, a reverse gradient of grading pulverized coal along the furnace the second finger and further to the third, fourth etc, a reverse gradient of grading pulverized coal along the furnace height is received. Implementing rising gradient of outlet velocities of the pf-gas mixture along the burner height, height is received. Implementing rising gradient of outlet velocities of the pf-gas mixture along the burner height, equal conditions are provided for coal particles of different size to reach the center of the furnace. Meanwhile, equal conditions are provided for coal particles of different size to reach the center of the furnace. Meanwhile, despite the coarser particles are fed to the bottom fingers, which are “responsible” for the stable combustion, there despite the coarser particles are fed to the bottom fingers, which are “responsible” for the stable combustion, there are enough amount of fine particles among them introduced at the bottom of the furnace at relatively low velocity, are enough amount of fine particles among them introduced at the bottom of the furnace at relatively low velocity, initiating by their rapid ignition enough heat for further ignition and combustion along the height of the furnace.initiating by their rapid ignition enough heat for further ignition and combustion along the height of the furnace.

The rising gradient of jet velocity and the reverse gradient of pulverized coal concentration counteract The rising gradient of jet velocity and the reverse gradient of pulverized coal concentration counteract the tendency towards progressive jet deformation upwards in the furnace, as a result of the change in the flame the tendency towards progressive jet deformation upwards in the furnace, as a result of the change in the flame viscosity and in the vertical component of the gas velocity. That prevents the expansion of the isotherms along the viscosity and in the vertical component of the gas velocity. That prevents the expansion of the isotherms along the furnace height and staged the combustion to provide for constant, relatively low temperatures avoiding fouling and furnace height and staged the combustion to provide for constant, relatively low temperatures avoiding fouling and slagging of the heating surfaces above the top burner finger including those, around drying gas of-takes.slagging of the heating surfaces above the top burner finger including those, around drying gas of-takes.

ТОТЕМАТОТЕМА’s technology is at the basis of the three-dimensional modelling of the furnace processes for a ’s technology is at the basis of the three-dimensional modelling of the furnace processes for a 650 t/h 650 t/h boiler and a boiler and a 260 t/h260 t/h boiler made by the Thermal Power department of the Technical University of Sofia with boiler made by the Thermal Power department of the Technical University of Sofia with TOTEMA’s participation.TOTEMA’s participation.

TOTEMA’S TECHNOLOGYTOTEMA’S TECHNOLOGY

TOTOТЕМА ТЕМА has applied its technology in developing coal firing systems for the following has applied its technology in developing coal firing systems for the following projectsprojects::

●● 150 MW units at Maritza East 2 TPP were reconstructed for burning low grade local lignite coal without 150 MW units at Maritza East 2 TPP were reconstructed for burning low grade local lignite coal without pre-dryingpre-drying

●● 210 MW units at Bobov Dol TPP where pulverized coal combustion was optimised and furnace water 210 MW units at Bobov Dol TPP where pulverized coal combustion was optimised and furnace water walls slaggingwalls slagging

was eliminated;was eliminated;

●● 110 MW units at Kraiova TPP and 220 MW units at Rovinari TPP in Rumania were reconstructed for 110 MW units at Kraiova TPP and 220 MW units at Rovinari TPP in Rumania were reconstructed for stable andstable and

efficient combustion of local lignite coal without supporting fuel; efficient combustion of local lignite coal without supporting fuel;

●● 850 850 tt//h boilers at Hagenwerder TPP in Germany were reconstructed for increasing boiler output and h boilers at Hagenwerder TPP in Germany were reconstructed for increasing boiler output and improving theirimproving their

technical and efficiency parameters; technical and efficiency parameters;

●● 110 110 MW units at Novaki TPP in Slovakia for eliminating furnace water walls slagging;MW units at Novaki TPP in Slovakia for eliminating furnace water walls slagging;

●● 350 350 MW units at Puentes TPP in Spain for eliminating slagging of heat-exchange surfaces;MW units at Puentes TPP in Spain for eliminating slagging of heat-exchange surfaces;

●● 350 350 MW units at Puentes TPP in Spain for conversion to new fuel mixture;MW units at Puentes TPP in Spain for conversion to new fuel mixture;

●● 210 210 MW units at Maritza East 2 TPP for eliminating furnace water walls slagging;MW units at Maritza East 2 TPP for eliminating furnace water walls slagging;

●● 150 MW units at Maritza East 2 TPP for increasing their heat production;150 MW units at Maritza East 2 TPP for increasing their heat production;

●● 160 160 tt//h boiler at Deven TPP for lowering NOx emissions and ensuring stable and efficient combustion;h boiler at Deven TPP for lowering NOx emissions and ensuring stable and efficient combustion;

●● 220 220 tt//h boiler and 1h boiler and 125 25 tt//h boiler at Republica TPP for lowering NOx emissions and ensuring stable and h boiler at Republica TPP for lowering NOx emissions and ensuring stable and efficientefficient

combustion.combustion.

TOTEMA’S TECHNOLOGYTOTEMA’S TECHNOLOGY--continuationcontinuation

TOTEMA’S TECHNOLOGYTOTEMA’S TECHNOLOGY--continuationcontinuation

TECHNOLOGIES AND EQUIPMENTTECHNOLOGIES AND EQUIPMENT TOTEMA’S COAL FIRING SYSTEMS OPERATE ATTOTEMA’S COAL FIRING SYSTEMS OPERATE AT::

●● 150 MW units at Maritza East 2 TPP were reconstructed for burning low grade local lignite coal without pre-150 MW units at Maritza East 2 TPP were reconstructed for burning low grade local lignite coal without pre-dryingdrying ●● 210 MW units at Bobov Dol TPP where pulverized coal combustion was optimised and furnace water walls 210 MW units at Bobov Dol TPP where pulverized coal combustion was optimised and furnace water walls slaggingslagging was eliminated;was eliminated;●● 110 MW units at Kraiova TPP and 220 MW units at Rovinari TPP in Rumania were reconstructed for stable and110 MW units at Kraiova TPP and 220 MW units at Rovinari TPP in Rumania were reconstructed for stable and efficient combustion of local lignite coal without supporting fuel; efficient combustion of local lignite coal without supporting fuel; ●● 850 850 tt//h boilers at Hagenwerder TPP in Germany were reconstructed for increasing boiler output and improving h boilers at Hagenwerder TPP in Germany were reconstructed for increasing boiler output and improving theirtheir technical and efficiency parameters; technical and efficiency parameters; ●● 110 110 MW units at Novaki TPP in Slovakia for eliminating furnace water walls slagging;MW units at Novaki TPP in Slovakia for eliminating furnace water walls slagging;●● 350 350 MW units at Puentes TPP in Spain for eliminating slagging of heat-exchange surfaces;MW units at Puentes TPP in Spain for eliminating slagging of heat-exchange surfaces;●● 350 350 MW units at Puentes TPP in Spain for conversion to new fuel mixture;MW units at Puentes TPP in Spain for conversion to new fuel mixture;●● 210 210 MW units at Maritza East 2 TPP for eliminating furnace water walls slagging;MW units at Maritza East 2 TPP for eliminating furnace water walls slagging;●● 150 MW units at Maritza East 2 TPP for increasing their heat production;150 MW units at Maritza East 2 TPP for increasing their heat production;●● 160 160 tt//h boiler at Deven TPP for lowering NOx emissions and ensuring stable and efficient combustion;h boiler at Deven TPP for lowering NOx emissions and ensuring stable and efficient combustion;●● 220 220 tt//h boiler and 1h boiler and 125 25 tt//h boiler at Republica TPP for lowering NOx emissions and ensuring stable and efficienth boiler at Republica TPP for lowering NOx emissions and ensuring stable and efficient combustion.combustion.

DESIGN, DELIVERY AND COMMISSIONING OF GAS AND OIL BURNERSDESIGN, DELIVERY AND COMMISSIONING OF GAS AND OIL BURNERS

The burner systems supplied by TOPTEMA for high-grade fossil fuels (natural gas and fuel oil) as ignition, The burner systems supplied by TOPTEMA for high-grade fossil fuels (natural gas and fuel oil) as ignition, supporting orsupporting or

main fuel are highly efficient, fully automated devices designed in compliance with the latest safety and quality main fuel are highly efficient, fully automated devices designed in compliance with the latest safety and quality requirements.requirements.

TOTEMA’s gas and oil burners have been installed at:TOTEMA’s gas and oil burners have been installed at:

• • Distric heating boiler ofDistric heating boiler of 100 100 GcalGcal//h at Timishoara HP in Romania;h at Timishoara HP in Romania;

• • 210 210 MW units at Varna TPP in Bulgaria;MW units at Varna TPP in Bulgaria;

• • 220 220 tt//h boiler at Plovdiv TPP in Bulgaria;h boiler at Plovdiv TPP in Bulgaria;

• • 210 210 MW units at Maritza East 3 TPP and Maritza East 2 TPP in Bulgaria;MW units at Maritza East 3 TPP and Maritza East 2 TPP in Bulgaria;

• • 220 220 tt//h boilers andh boilers and 110 110 MW units at Russe TPP in Bulgaria;MW units at Russe TPP in Bulgaria;

• • 220 220 tt//h andh and 125 125 tt//h boilers at Republica TPP in Bulgaria.h boilers at Republica TPP in Bulgaria.

MODERNISATION OF HEAT-EXCHANGE SURFACESMODERNISATION OF HEAT-EXCHANGE SURFACES

• • Replacement of furnace water walls of units with upgraded burner systems at Maritza East 2 TPP;Replacement of furnace water walls of units with upgraded burner systems at Maritza East 2 TPP;

• • Overall modernization of district heating boiler Overall modernization of district heating boiler ПТВМ-100 ПТВМ-100 by replacing all heat-exchange surfaces with by replacing all heat-exchange surfaces with membrane water walls at Vilnjus TPP in Lithuania;membrane water walls at Vilnjus TPP in Lithuania;

• • Replacement and optimization of the operation of pendant multiflow superheaters of three Replacement and optimization of the operation of pendant multiflow superheaters of three 210 210 MW MW units boilers at Bobov Dol TPP;units boilers at Bobov Dol TPP;

• • Modernization of two BKZ Modernization of two BKZ - 160 - 160 boilers by installing new membrane water walls of the furnace and new boilers by installing new membrane water walls of the furnace and new convective heat-exchange surfaces for oil refinery Lukoil Neftochim in Burgas;convective heat-exchange surfaces for oil refinery Lukoil Neftochim in Burgas;

•• Adaptation of the reheaters of Adaptation of the reheaters of 150 150 MW units boilers to the new turbines increased heat rate at Maritza MW units boilers to the new turbines increased heat rate at Maritza East 2 TPP;East 2 TPP;

• • Modernization a BKZ Modernization a BKZ - 160 - 160 boiler by installing new membrane water walls of the furnace at Brikel EAD.boiler by installing new membrane water walls of the furnace at Brikel EAD.

• • Modernization of two steam generators with a capacity of Modernization of two steam generators with a capacity of 160 160 tt//h of steam at Deven TPP, owned by h of steam at Deven TPP, owned by Belgian chemical group Solvay Sodi, for burning low-volatile coal in a wet bottom furnace with lower NOx Belgian chemical group Solvay Sodi, for burning low-volatile coal in a wet bottom furnace with lower NOx emissionsemissions. . The associated to the burners walls of the furnace have been replaced with new membrane The associated to the burners walls of the furnace have been replaced with new membrane water walls of the latest design and efficient insulation.water walls of the latest design and efficient insulation.

• • Replacement of the air heater and the economizer at Republika TPP.Replacement of the air heater and the economizer at Republika TPP.

TECHNOLOGIES AND EQUIPMENTTECHNOLOGIES AND EQUIPMENT--continuationcontinuation

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

REFERENCESREFERENCES

● ● Bulgaria Power Complex Rehabilitation Project – with Overseas Bechtel Incorporated, Bulgaria Power Complex Rehabilitation Project – with Overseas Bechtel Incorporated, USUS

● ● Evaluation of Energy Price Subsidies for Gabrovo – with Gilbert / Commonwealth, USEvaluation of Energy Price Subsidies for Gabrovo – with Gilbert / Commonwealth, US

● ● Bulgarian Clean Coal Project – as a subcontractor of EERC, USBulgarian Clean Coal Project – as a subcontractor of EERC, US

● ● Options of Imported Coal Supply for “Varna” PP – with IEEC, UKOptions of Imported Coal Supply for “Varna” PP – with IEEC, UK

● “● “Maritza East 3” PP 210 MW units refurbishment specification – as consultant of PB Maritza East 3” PP 210 MW units refurbishment specification – as consultant of PB Power, UKPower, UK

● ● Initial Performance Tests of Initial Performance Tests of 210 210 MW units at Maritza East 3 TPP, jointly with German MW units at Maritza East 3 TPP, jointly with German VEAG and E.ON VEAG and E.ON

● ● Technical cooperation in the post rehabilitation acceptance tests of the Technical cooperation in the post rehabilitation acceptance tests of the 210 210 MW units MW units of Maritza East 3 TPP, jointly with German E.ON and Italy’s ENELof Maritza East 3 TPP, jointly with German E.ON and Italy’s ENEL..

● ● Participation in a tender for rehabilitation of BELHATOW PP in consortium with Participation in a tender for rehabilitation of BELHATOW PP in consortium with MOSTOSTAL - PolandMOSTOSTAL - Poland

INTERNACIONAL PARTNERSHIP

Application software for calculating heat transfer in the furnace and the following heat surfacesApplication software for calculating heat transfer in the furnace and the following heat surfaces

When new boiler equipment is designed or modifications of an existing facility are planned it is necessary to make heatWhen new boiler equipment is designed or modifications of an existing facility are planned it is necessary to make heat

and mass balance of the boiler and of the pulverized coal system.and mass balance of the boiler and of the pulverized coal system.

ТОТЕМА ТОТЕМА has developed its own universal software product for calculating the heat exchange in water heating andhas developed its own universal software product for calculating the heat exchange in water heating and

steam generating boilers, firing solid, liquid or gas fuels. The product determines the efficiency of the boiler as well as thesteam generating boilers, firing solid, liquid or gas fuels. The product determines the efficiency of the boiler as well as the

fuel, water, steam, air and flue gas flows.fuel, water, steam, air and flue gas flows.

The temperature of the flue gas along the height of the furnace is determined by taking into consideration step by stepThe temperature of the flue gas along the height of the furnace is determined by taking into consideration step by step

(staged) feeding of the fuel and air and the fuel combustion “by zones”. It is a simple and reliable method of (staged) feeding of the fuel and air and the fuel combustion “by zones”. It is a simple and reliable method of successivesuccessive

approximations, approximations, which was developed by which was developed by ТОТЕМА ТОТЕМА in compliance with the requirements for the distribution of the coal in compliance with the requirements for the distribution of the coal

powder and the drying gas along the height of the furnace and the technology of efficient combustion of pulverized coal withpowder and the drying gas along the height of the furnace and the technology of efficient combustion of pulverized coal with

low emissions of nitrogen oxides. The method allows calculating the temperatures of the flue gases and the low emissions of nitrogen oxides. The method allows calculating the temperatures of the flue gases and the

concentration of oxygen along the height of the furnace as well as assessing the required conditions for maintaining efficientconcentration of oxygen along the height of the furnace as well as assessing the required conditions for maintaining efficient

combustion, so that low enough and relatively constant temperatures of the flue gas are obtained along the height of thecombustion, so that low enough and relatively constant temperatures of the flue gas are obtained along the height of the

furnace to prevent slagging and minimize nitrogen oxide formation.furnace to prevent slagging and minimize nitrogen oxide formation.

TOTEMA’s method of calculating heat transfer in the furnace “by zones” has been developed and verified for coal firedTOTEMA’s method of calculating heat transfer in the furnace “by zones” has been developed and verified for coal fired

furnaces with tiered burners, without constraints as to the size of the furnace or the coal grade.furnaces with tiered burners, without constraints as to the size of the furnace or the coal grade.

The drop in temperatures along the gas duct beyond the furnace is calculated by iteration.The drop in temperatures along the gas duct beyond the furnace is calculated by iteration.

The boiler parameters estimated by the heat calculations of TOTEMA coincide with sufficient accuracy with theThe boiler parameters estimated by the heat calculations of TOTEMA coincide with sufficient accuracy with the

operation results.operation results.

DEVELOPING OF OWN SOFTWARE DEVELOPING OF OWN SOFTWARE PRODUCTSPRODUCTS

Application software for calculating the heat balance of steam generators and district heating boilers fired with solid, liquid or gas fuels

The software, developed in compliance with DIN 1942/1994 standards for Guarantee Performance Testing of Boilers, is

used for processing the results of the operation tests of boilers – for guarantee performance testing, for assessing the

conditio of different boiler elements, for assessing the quality of repair works, for assessing the technical and efficiency

parameters.

Application software for calculating pulverized coal system heat balance

The software is used for developing new projects and selecting technologies and equipment for coal processing

(grinding and drying) as well as for assessing the condition and the capacity of the existing equipment when the quality of

fuel or the heat output of the boiler are changed.

Combined with the “by zone” calculation of the heat transfer in the furnace, it gives input data for accurate calculation

of the thermal characteristics of the heat exchange surfaces.

DEVELOPING OF OWN SOFTWARE PRODUCTS-DEVELOPING OF OWN SOFTWARE PRODUCTS-continuationcontinuation

• • Power Complex Rehabilitation Project in Bulgaria - in partnership with Overseas Bechtel Power Complex Rehabilitation Project in Bulgaria - in partnership with Overseas Bechtel Incorporated, US.Incorporated, US.

• • Evaluation of Energy Price Subsidies - jointly with GilbertEvaluation of Energy Price Subsidies - jointly with Gilbert/ / Commonwealth, USCommonwealth, US

• • Bulgarian Clean Coal Project - jointly with EERC, USBulgarian Clean Coal Project - jointly with EERC, US

• • Options of Imported Coal Supply for Varna TPP - jointly with IEEC, UKOptions of Imported Coal Supply for Varna TPP - jointly with IEEC, UK

• • Technical and Efficiency Sssessment of the Conversion Project for Varna TPPTechnical and Efficiency Sssessment of the Conversion Project for Varna TPP

• • Consultant of PB Power UK in “Maritza East 3” TPP Consultant of PB Power UK in “Maritza East 3” TPP 210 210 MW Units Refurbishment MW Units Refurbishment Specification.Specification.

• • Initial Performance Tests of Initial Performance Tests of 210 210 MW units at Maritza East 3 TPP, jointly with German VEAG MW units at Maritza East 3 TPP, jointly with German VEAG and E.ONand E.ON

• • Technical cooperation in the post rehabilitation acceptance tests of the Technical cooperation in the post rehabilitation acceptance tests of the 210 210 MW units of MW units of Maritza East 3Maritza East 3

TPP, jointly with German E.ON and Italy’s EnelTPP, jointly with German E.ON and Italy’s Enel. .

RESEARCH CONSULTANCY RESEARCH CONSULTANCY AND TECHNICAL AND TECHNICAL

ASSISTANCEASSISTANCE

ТОТЕМАТОТЕМА’s solutions contributed to eliminating slagging of heat exchange surfaces at the ’s solutions contributed to eliminating slagging of heat exchange surfaces at the 350350 MW units ofMW units of

Puentes TPP in Spain in the Puentes TPP in Spain in the 1987-1989 1987-1989 periodperiod

GalleryGallery

The oil and gas burner systems designed by TOTEMA for the The oil and gas burner systems designed by TOTEMA for the 210 210 MW units at Varna TPP, the MW units at Varna TPP, the 110 110 MW unitMW unit

and boilers with 220 t/h steam capacity in Russe TPP are fully automated, with an excellent and boilers with 220 t/h steam capacity in Russe TPP are fully automated, with an excellent reliability toreliability to

guarantee efficient combustion of fuel oil or natural gas as an ignition fuel.guarantee efficient combustion of fuel oil or natural gas as an ignition fuel.. . Due to TOTEMA’s upgrade, the coal burner systems of the Due to TOTEMA’s upgrade, the coal burner systems of the 210 210 MW units of Maritza East 2 TPP MW units of Maritza East 2 TPP

have beenhave been

operating efficiently since operating efficiently since 2ООО. 2ООО.

The scope of work implemented by The scope of work implemented by ТОТЕМА ТОТЕМА for the rehabilitation of the for the rehabilitation of the 150 150 MW units of MW units of Maritza East 2Maritza East 2

TPP includes:TPP includes:

• • basic and detailed engineering assessment of the new coal burner systems;basic and detailed engineering assessment of the new coal burner systems;

• • basic and detailed engineering of a new intermediate superheater;basic and detailed engineering of a new intermediate superheater;

• • optimization of the combustion air ductworkoptimization of the combustion air ductwork. . Modernization of two steam generators with a capacity of Modernization of two steam generators with a capacity of 160 160 tt//h of steam at Deven TPP, h of steam at Deven TPP,

owned byowned by

Belgian chemical group Solvay Sodi, for burning low-volatile coal in a wet bottom furnace with Belgian chemical group Solvay Sodi, for burning low-volatile coal in a wet bottom furnace with lower NOxlower NOx

emissionsemissions. . The associated walls of the furnace have been replaced with new membrane water The associated walls of the furnace have been replaced with new membrane water walls of thewalls of the

latest design and efficient insulation.latest design and efficient insulation.

NOx emissions after the reconstruction of NOx emissions after the reconstruction of 210 210 MW units of Maritza East 2 TPPMW units of Maritza East 2 TPP

Engineering, Manufacture of the elements and Assembling of steel construction of FBB in Deven Engineering, Manufacture of the elements and Assembling of steel construction of FBB in Deven PP - PP - Solvay SodiSolvay Sodi

GalleryGallery--continuationcontinuation

Initial Performance Tests of Initial Performance Tests of 210 210 MW units at Maritza East 3 TPP, jointly with German VEAG and MW units at Maritza East 3 TPP, jointly with German VEAG and E.ONE.ON

Technical cooperation in the post rehabilitation acceptance tests of the Technical cooperation in the post rehabilitation acceptance tests of the 210 210 MW units of Maritza MW units of Maritza East 3 TPP, jointly with German E.ON and Italy’s EnelEast 3 TPP, jointly with German E.ON and Italy’s Enel. .

TOTEMA realises a complete cycle TOTEMA realises a complete cycle

- - from from engineering assessment and feasibility studyengineering assessment and feasibility study

Delivery of 5 mw pulverised fuel burners for CIUDEN FUNDACION Delivery of 5 mw pulverised fuel burners for CIUDEN FUNDACION test facility for advanced test facility for advanced technologies for CO2 capture in coal power generation – CIUDAD DE LA ENERGIA - SPAINtechnologies for CO2 capture in coal power generation – CIUDAD DE LA ENERGIA - SPAIN..

TOTEMA realises a complete cycle TOTEMA realises a complete cycle

- - through through design, delivery, supervising of manufacturing and assemblage design, delivery, supervising of manufacturing and assemblage to to commissioning commissioning “turn key”.“turn key”.

Reconstruction of a Reconstruction of a 55 55 MW steam generator of Toplofikacia Pernik for burning high-ash MW steam generator of Toplofikacia Pernik for burning high-ash content fuel from the Pernik and Chukurovo mines, resulting in stable and efficient content fuel from the Pernik and Chukurovo mines, resulting in stable and efficient combustion with lower than 120mg/Nm3 emissions of NOx.combustion with lower than 120mg/Nm3 emissions of NOx.

TOTEMA Ltd.TOTEMA Ltd.

14 Kozloduy St 14 Kozloduy St

SofiaSofia 1202 1202

Phone:Phone: +359 2 931 4074 +359 2 931 4074

Fax:Fax: +359 2 832 6174 +359 2 832 6174

e-mail: [email protected]: [email protected]

web: web: http://www.totema.point.bghttp://www.totema.point.bg

CONTACTCONTACT