Mitsubishi Auxiliary Boiler : MAC-B Mitsubishi Auxiliary Boiler Mitsubishi Auxiliary Boiler : : MAC MAC - - B B Meaning of Meaning of MAC MAC - - B B M : Mitsubishi M : Mitsubishi A : Auxiliary A : Auxiliary C : Compact C : Compact B : Type B : Type December, 2007
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Combustion Gas FlowCombustion Gas FlowCombustion Gas Flow
Baffle PlateBaffle Plate
Partition water wallPartition water wall
Wind BoxWind Box
--Easy inspection and maintenanceEasy inspection and maintenance--Two manholesTwo manholes--InIn--line tube arrangementline tube arrangement--Less soot deposit using bare tubesLess soot deposit using bare tubes--Applicable soot blower during boiler operationApplicable soot blower during boiler operation((SSoot blower is standard equipment)oot blower is standard equipment)
--TwoTwo--drum waterdrum water--walled typewalled type--Long lifetime due to fLong lifetime due to furnace surrounded by urnace surrounded by water wallwater wall tubestubes and no thermal stress constructionand no thermal stress construction--Stable Combustion with large furnaceStable Combustion with large furnace--Pure steamPure steam
--Safe OperationSafe Operation--Easy operation and monitoring using Graphic panelEasy operation and monitoring using Graphic panel--Stable water levelStable water level--Back fire protection Back fire protection of of boiler control systemboiler control system
Boiler Control SystemBoiler Control SystemBoiler Control System
ACCACCFWCFWC
: Automatic Boiler Control : Automatic Boiler Control : Automatic Combustion Control : Automatic Combustion Control : Feed Water Control : Feed Water Control : Burner Management System: Burner Management System
ABCABC
BMSBMS
Control FO control Control FO control valvevalve by detecting FO by detecting FO pressure at FO headerpressure at FO header
Control F.D.FAN inlet vane by detecting burner Control F.D.FAN inlet vane by detecting burner draft lossdraft loss (between wind box and furnace)(between wind box and furnace)
①① Control FW control V/V by detecting drum Control FW control V/V by detecting drum water level (1 element type)water level (1 element type)
②② Use Steam Flow as Feed Forward signal Use Steam Flow as Feed Forward signal when there are 2 boiler control (2 elements type)when there are 2 boiler control (2 elements type)
Steam press. control :Steam press.Steam press. control control :: Control FO flow to reduce the deviation with Control FO flow to reduce the deviation with setting pressure by detecting Drum pressuresetting pressure by detecting Drum pressure
FO Flow control :FO FlowFO Flow control control ::
Air Flow control :Air FlowAir Flow control control ::
FW flow control :FW flow control FW flow control ::
SeattleSeattleLos AngelesLos Angeles Hartford (Connecticut)Hartford (Connecticut)
Fort Worth (Texas)Fort Worth (Texas)
BostonBoston
MexicoMexico
Sao Paulo (CBC)Sao Paulo (CBC)
New YorkNew York
After-sales Service Network in the WorldAfterAfter--sales Service Network in the Worldsales Service Network in the World
GO Firing for SOx Emission Control (1/3)GO Firing for SOx Emission Control (1/3)GO Firing for SOx Emission Control (1/3)
-- SOx Emission Control in EUSOx Emission Control in EU
2007.112007.11~~NNorth Seaorth Sea
Other SeaOther Sea4.54.5%%
2010.1.12010.1.1~~AllAll Ports in EUPorts in EU0.1%0.1%
2006.52006.5~~BBalticaltic SSeaea1.51.5%%
OperationOperationAreaAreaSulfur content Sulfur content of fuel oilof fuel oil
Applying Applying ““LowLow--Sulfur Fuel Oil (Gas Oil)Sulfur Fuel Oil (Gas Oil)””: DMA Grade of : DMA Grade of ISOISO 82178217
NORTH SEA
BALTIC SEA
By CraftMAP
The only measure is The only measure is ・・・・・・
GO Firing for SOx Emission Control (2/3)GO Firing forGO Firing for SOx Emission Control (2/3)SOx Emission Control (2/3)
-- Indispensable Item for applying GAS OILIndispensable Item for applying GAS OIL
Boiler trip by Boiler trip by ““Heat trace onHeat trace on””““FO temp. highFO temp. high””
3) Additional 3) Additional interlockinterlock
Atomizing mediumAtomizing medium・・AirAir : Burner performance can be kept . : Burner performance can be kept . ・・SteamSteam : Burner turn down ratio decrease. : Burner turn down ratio decrease.
Atomizer must be changed to keep burner Atomizer must be changed to keep burner performance.performance.
Combustion control is also necessary to change Combustion control is also necessary to change according to the above modification.according to the above modification.
2) Change of 2) Change of atomizing mediumatomizing mediumor or atomizeratomizer itself itself
Modification of control systemModification of control system
Gas Oil ViscosityGas Oil Viscosity・・> 2.5 > 2.5 cStcSt : MHI standard FO pump (option) is available. : MHI standard FO pump (option) is available. ・・<< 2.5 2.5 cStcSt : Additional FO pump for Gas Oil is necessary.: Additional FO pump for Gas Oil is necessary.
**Viscosity criteria may be changed by pump makerViscosity criteria may be changed by pump maker..
Discharge pressure can not be taken for Gas Oil with low Discharge pressure can not be taken for Gas Oil with low viscosity by fuel oil pump planned only for HFO.viscosity by fuel oil pump planned only for HFO.
1) Additional 1) Additional fuel oil pumpfuel oil pumpfor Gas Oilfor Gas Oil
RemarksRemarksItemItem
GO Firing for SOx Emission Control (3/3)GO Firing forGO Firing for SOx Emission Control (3/3)SOx Emission Control (3/3)
-- Recommendation Item for applying GAS OILRecommendation Item for applying GAS OIL
・・For multiFor multi--burner boilerburner boiler・・Shorten ignition time at increasing firing burnerShorten ignition time at increasing firing burner
3) 3) Igniter Igniter for all burnersfor all burners
・・IIndependentndependent FO piping of Heavy Fuel Oil and FO piping of Heavy Fuel Oil and Gas Oil to the FO control valveGas Oil to the FO control valve・・AAvoid mixing Gas Oil with high temperature void mixing Gas Oil with high temperature Heavy Fuel Oil in case of bunker changeHeavy Fuel Oil in case of bunker change
Additional operation mode for GO firingAdditional operation mode for GO firing・・Combustion control change for GO firingCombustion control change for GO firing・・Activate additional interlockActivate additional interlock
-- Boiler trip by Boiler trip by ““Heat trace onHeat trace on”” , , ““FO temp. highFO temp. high””