Auxiliary Boiler MAC-B
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Mitsubishi Auxiliary Boiler : MAC-B MAC-B Meaning of MAC-B M : Mitsubishi A : Auxiliary C : Compact B : Type December, 2007

History of Mitsubishi Marine Boiler -More than 120 years history 1885 : The first Marine Boiler manufactured 1964 : The first Two-drum water-walled MAC Boiler 1983 : The first MAC-B manufactured -Total 5000 Boilers (including Main Boiler) Two-Drum Water-Tube MAC Boiler :Total 1,393 MAC-B Boiler : Total 1,227 (As of Nov. 2007)

Structure F.O.Burner Wind Box Gas Steam Outlet Outlet Steam Separator Combustion Air Inlet Steam Drum Generating Tube Soot Blower Partition water wall Furnace Combustion Gas Flow Screen Tube Front(Rear) Wall Tube Baffle Plate Water Drum

Advantages of MAC-B MAC-B -Two-drum water-walled type Steam separator & baffle plate -Long lifetime due to furnace surrounded by water wall tubes and no thermal stress construction -Stable Combustion with large furnace -Pure steam -Easy inspection and maintenance Soot blower -Two manholes -In-line tube arrangement manhole -Less soot deposit using bare tubes -Applicable soot blower during boiler operation (Soot blower is standard equipment) -Safe Operation -Easy operation and monitoring using Graphic panel -Stable water level -Back fire protection of boiler control system -Production...

Boiler Control System : Automatic Boiler Control ACC : Automatic Combustion Control Differential Pressure = Burner draft loss FWC : Feed Water Control : Burner Management System BMS ABC Wind box Steam press. control Control FO flow to reduce the deviation with Steam press. control setting pressure by detecting Drum pressure FO Flow control FO Flow control Control FO control valve by detecting FO pressure at FO header Air Flow control Air Flow control Control F.D.FAN inlet vane by detecting burner draft loss (between wind box and furnace) (Burner draft loss) = (Wind box press.) – (Furnace...

-Boiler Mode Boiler Mode Condition Tanker Service COPT operation ECO Back up Exh. Eco. Back up during voyage IGS Top Up IGS Topping-up Repose (interlock with soot blower) Cancel unnecessary alarm while Boiler Stops Steam Press. 16k Burner Auto Start/Stop 12k/16.5k (1.57MPa) (1.18/1.62MPa) 6k 5.5k/7k (0.59MPa) (0.54/0.69MPa) - N/A - N/A -Automatic Operation Start : Steam Press. 12k (1.18MPa) Burner Auto Start/Stop Depend on Steam Pressure Master/Slave Operation Auto start/stop of Slave boiler according to Master boiler load Stop : Steam Press. 16.5k (1.62MPa) Start : Boiler load 60% Stop :...

Boiler Control Panel Condition Monitor Graphic Panel Graphic Panel Graphic Panel Local Boiler Control Panel Condition Monitor

After-sales Service Network in the World After-sales U.K. Moscow Hamburg Madrid Seattle Fort Worth (Texas) Los Angeles Hartford (Connecticut) Busan Denmark Beijing Taipei Boston Tokyo, Japan Hong Kong Ho Chi Minh Yokohama, Japan Paris Munich Istanbul New Delhi Dubai Kobe, Japan Bahrain Portugal Nagasaki, Japan Jakarta Shanghai KOGYO> 2006 OPEN New York Houston Mexico Sao Paulo (CBC) Rio de Janeiro MHI Marine Engineering, Ltd. (TOKYO) +81-3-3798-5941 +81- 3798Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard & Machinery Works Singapore PYE> Office Technical Agent TOYO DENGYO, AMCO...

GO Firing for SOx Emission Control (1/3) - SOx Emission Control in EU Sulfur content of fuel oil 1.5 Area Operation Baltic Sea 2006.5 North Sea 4.5 All Ports in EU 2007.11 BALTIC SEA Other Sea 0.1% NORTH SEA 2010.1.1 By CraftMAP The only measure is ・・・ Applying “Low-Sulfur Fuel Oil (Gas Oil)” : DMA Grade of ISO 8217

GO Firing for SOx Emission Control (2/3) - Indispensable Item for applying GAS OIL Item 1) Additional fuel oil pump for Gas Oil Remarks Gas Oil Viscosity ・> 2.5 cSt : MHI standard FO pump (option) is available. < 2.5 cSt : Additional FO pump for Gas Oil is necessary. *Viscosity criteria may be changed by pump maker. Discharge pressure can not be taken for Gas Oil with low viscosity by fuel oil pump planned only for HFO. 2) Change of atomizing medium or atomizer itself Modification of control system 3) Additional interlock Atomizing medium ・Air : Burner performance can be kept . ・Steam :...

GO Firing for SOx Emission Control (3/3) - Recommendation Item for applying GAS OIL Item 1) GO mode Remarks Additional operation mode for GO firing Combustion control change for GO firing Activate additional interlock - Boiler trip by “Heat trace on” , “FO temp. high” 2) Independent fuel oil piping Independent FO piping of Heavy Fuel Oil and Gas Oil to the FO control valve ・Avoid mixing Gas Oil with high temperature Heavy Fuel Oil in case of bunker change 3) Igniter for all burners For multi-burner boiler Shorten ignition time at increasing firing burner