Refrigeration and Mine Cooling

HOWDEN PROCESS COMPRESSORS

www.howden.co.za

PROCESS GAS COMPRESSION, REFRIGERATION AND MINE COOLING

HOWDEN PROCESS COMPRESSORS1

PROCESS GAS COMPRESSORS

Howden Process Compressors engineers, manufactures and commissions several compression systems, using either oil-free or oilinjected rotary twin-screw compressors, or integrally-geared centrifugal turbo blowers. Engineered roots-type rotary-lobe air blowersand liquid ring gas compressors and distribution systems complete the package.

Product Capabilities

Oil-free and Oil-injected Screw CompressorSystems Capacities of up to 70 000 m3/hr (oil free) Capacities of up to 15 000 m3/hr (oil injected) Maximum operating pressures to 30 bar g

(oil free) Maximum operating pressures to 60 bar g

(oil injected)

Single-stage Turbo Blowers Capacities of up to 125 000 m3/hr Pressure ratios of 1,3 to 3 (single stage) Static pressures of up to 7 bar abs Combined inlet and diffuser vane control for the

highest efficiency over the entire operating range

Low-speed Centrifugal Blowers Capacities of up to 50 000 m3/hr Pressure ratios of up to 1,7 Static pressures of up to 2 bar abs

Engineered Roots-type Rotary-lobe Gas Blowers Capacities of up to 12 000 m3/hr Pressure ratios of between 1,3 and 1,95 Static pressures of up to 2 bar abs Two lobe and tri-lobe rotor design

Liquid-ring Compressor Systems Capacities of up to 36 000 m3/hr Pressure ratios of up to 2 Static pressure of up to 2 bar abs

Applications

Sulphur RecoveryAir blowers providing reaction air for the catalyticrecovery of sulphur within the petrochemicalindustry.

Sulphuric Acid PlantCombustion air blowers and process gas mixturecleaning, sometimes combined.

Flue Gas DesulphurisationOxidation air blowers associated with the cleaningof flue gases produced by the power generation andheavy manufacturing industries.

Industry Effluent TreatmentAir blowers associated with the biological treatmentof effluent within industrial plants.

Furnace/Smelter/Reactor Air SupplyAir blowers providing combustion or reaction airprimarily for the petrochemical and metals industries.

Process Gas BlowersBlowers handling a wide range of process gases forthe petrochemical and heavy manufacturingindustries.

Fuel Gas BlowersBlowers handling natural and dirty coke-oven,manufactured, landfill and other bio gases (landfillextraction).

Furnace Off-gas RecompressionLR Compressors to re-compress scrubbed furnaceoff-gas.

Carbon Black PlantAir blowers providing combustion air for associatedfurnaces.

Waste Water TreatmentAir blowers used in the biological treatment ofeffluent in municipal sewage treatment plants.

FermentationAir blowers associated with biochemical fermentationwithin the pharmaceutical and additive industries.

PetrochemicalButadiene, ethylene, flare gas recovery, lime kiln,process cooling, soda ash, sour hydrocarbons.

Right: A Howden Turbo Blower

2 HOWDEN PROCESS COMPRESSORS

REFRIGERATION SYSTEMS

We supply packaged refrigeration compressor sets, process chillers with S&T or plate heat exchangers, mine refrigeration machinesand ice-making plants and turnkey cooling plants.

Product Capabilities

Refrigeration Compressors Positive displacement oil-injected screw

compressors for 10% - 100% capacity Largest-capacity range from 293 to 10 580 m3/h

swept volume (50 Hz) Refrigeration capacity insensitive to changes in

condensing temperature Refrigeration capacity insensitive to fouling of

evaporators and condensers Direct drive via 2-pole or 4-pole electric motors Howden semi-synthetic oils for lubrication systems Oil cooling by refrigerant injection/thermosyphon

or water-cooled oil cooler A minimum part load operation of 10% without

hot gas bypass Variable compression ratios for optimal efficiency Refrigeration applications at temperatures as low

as -400C

Plate Heat Exchanger Chillers Reduced water circulation rates due to 0,50C Low maintenance and reduced fouling Heat exchanger size can be varied to

accommodate changes in water flow rates Choice of materials of manufacture, for example

316 SS, Avesta 254 or titanium Resistant to damage resulting from accidental

freezing No cranage required for maintenance of PHE High COP of flooded thermosyphon design Compact design is one fifth the size of

conventional shell and tube heat exchangers

Ammonia Refrigerant High thermodynamic efficiency Low approach temperatures Low refrigerant circulation rate High heat transfer coefficients Ease of leak detection Low refrigerant charge and cost Locally manufactured Environmentally friendly


General

Howden superfeed (economiser) systems are available for enhanced COP

No refrigerant pump-out facilities required No internal corrosion of the plant No refrigerant pumps required Custom design to client/international

specifications

Chiller Performance Data

Evaporating temperature: -1,50CCondensing temperature: 300CChilled water: 0,50C water cooled* Smaller capacities also available

Applications

PetrochemicalEngineered process chillers to API specifications.

MiningRefrigeration machines, turnkey cooling projects andice plants for underground cooling.

Food and BeverageRefrigeration for breweries, abattoirs and fermentationprocesses.

Top left and right: Mine RefrigerationPlants; Bottom left: A Liquid RingCompressor; A CAD Rendering Imageof a Mine Refrigeration Plant (secondfrom left); A Reciprocating DiaphragmCompressor (third from left) and a MineCooling Plant Heat Exchanger (fourthfrom left).

Refrigeration Absorbed Cap kW(R)* Power kW(E)

321/193 4 900 850321/220 5 800 990365/165 6 100 1 110365/193 7 200 1 300510/165 8 500 1 430510/193 9 500 1 600


Howden Process Compressors is a specialist contracting division of Howden Projects, a business unit within Howden Africa HoldingsLimited. We offer custom-engineered process and mine cooling, refrigeration and process gas compression solutions. Our turnkeyinstallations, or equipment supplied to customer specification, are supported by comprehensive engineering support services, all backedby a quality management system certified in accordance with ISO 9001.

A COMPLETE CAPABILITY

Top: Howden Compressors.Bottom left: Matching screws for a HowdenCompressor for refurbishment; aRefrigeration Plant (centre); and a RootsBlower (right).

Our Capabilities Site performance assessment and monitoring Compressor and blower factory rebuilds OEM spares with strategic stock holdings Customer service support comprising installation

and commissioning, site inspection, fault finding and testing and in-house/on-site training

Field Services Compliance with statutory inspection codes Routine maintenance and performance monitoring Fault finding Plant installation Plant safety upgrades and audits Commissioning services Valve and oil pump refurbishment

Compressor and Blower Rebuilds All makes of rotary screw compressors Centrifugal compressor conversions and overhauls Roots blower repairs, rebuilds, site monitoring

and performance testing

Spare Parts Howden screw compressor original parts Oil coalescing elements and oil filters for all makes

of compressor sets and other related equipment (Jordan, Blackmer, Robinet)

Howden Refrigeration Oils Performance semi-synthetic oil for low oil carry

over and extended intervals between oil changes Routine oil analysis and centrifuge cleaning and

dehydrating of oils

Plant Upgrades Complete plant rebuilds Heat exchanger field servicing Pneumatic site testing of vessels and pipe

installations for statutory recertification

Howden Process CompressorsA Division of Howden Africa Holdings LtdPO Box 9501Johannesburg2000

Tel: +27 (0) 11 240 4000Fax: +27 (0) 11 493 3861E-mail: [email protected]


Howden Africa Holdings Limited. 2010.Howden and the flying H logo are registered trade marks belonging to Howden Group Limited

Howden Africa is a partner within the Howden worldwide organisation,the global force in air and gas handling. With over 150 years' experiencein engineering fans, blowers, air preheaters, compressors and associatedequipment, Howden has a workforce of around 3 500 employees andcompanies in 16 countries. We have a presence on every continent, andan impressive track record of invention and innovation that is today beingcarried forward by significant investment in technological research anddevelopment, dedication to environmental improvement, and acommitment to the training and welfare of our staff.

ENGINEERING EXCELLENCE WORLDWIDE

Refrigeration and Mine Cooling

Documents