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Efficient Operation of Mitsubishi MC-30D Auxiliary Boiler on .T.S. SEIUN MARU

This guide provides detailed insights into the operation and maintenance of the Mitsubishi MC-30D auxiliary boiler onboard the .T.S. SEIUN MARU. Learn about the performance, arrangement, and safety aspects of the boiler system, including feedwater control, soot blowing, and burner maintenance. Explore key operations like pre-purging and post-purging for safe combustion. Understand the importance of water treatment, boiler water analysis, and safety devices to ensure optimal boiler performance and prevent corrosion and scale buildup. Discover crucial maintenance practices for efficient operation and the performance of the exhaust gas economizer. Enhance your knowledge of boiler water treatment, safety procedures, and essential operations for the smooth functioning of the auxiliary boiler.

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Efficient Operation of Mitsubishi MC-30D Auxiliary Boiler on .T.S. SEIUN MARU

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  1. T.S SEIUN MARU AUXILIARY BOILER Third Engineer ボイラ

  2. PREFERENCE OF AUX’ BOILER 蒸気出口 ガス出口 ボイラ

  3. PERFORMANCE OF AUX BOILER • Type：MITSUBISHI MC-30D • Steam pressure ：0.59ＭＰａ • Feed water temperature ：60℃ • Evaporation ：3000kg/h • Main Fuel ：C heavy oil ボイラ

  4. ARRANGEMENT Water drum (top) Evaporation tubes Inspection hall Soot blower Access Door Outlet for exhaust gas Oil burner Water drum (bottom) Furnace ボイラ

  5. BoilerFOSupplyPump Supplies FO or DO from each service tank to FO burning pump. • ForcedDraftFan Supplies air for combustion, pre­purge and post­purge on aux. boiler • SootBlower Operation for Removing the soot attached on the heating tubes of aux. boiler or exh. gas economizer with steam. It has done in periodically to keep the thermal efficiency and prevention of getting damage of heating tubes. • InspectionTank Inspects the oil incorporation into the drain fromheating steam drain. So called as Observation tank too. • FeedFilterTank Removes the oil and impurity materials from condensate water (boiler feed water). • AtmosphericCondenser As a role , condensation the steam drain from the tank-heating line and several heaters with low temp cooling fresh water. ボイラ

  6. BOILER FO SYSTEM ボイラ

  7. BURNER FRONT IGNITER BURNER FDFMOTOR ボイラ

  8. SAFETY VALVE ボイラ

  9. Feed Water Control Valve ボイラ

  10. WATER LEVEL GAUGE ボイラ

  11. STEAM SERVICE LINE ボイラ

  12. AUTOMATIC COMBUSTION TIME CHART ボイラ

  13. START FO BURNING PUMP & F.D.F. PRE - PURGE （ ９０ sec ） IGNITION to PILOT BURNER WORKING of FLAME EYE IGNITION to MAIN BURNER IGNITION to HIGH/LOW BURNER STEAM PRESS REACH to 0.59MPa EXTINCTION HIGH/LOW BURNER PRESSURE RISE EXTINCTION PILOT BURNER BURNER AUTOMATIC OPERATION 《 START 》 STEAM PRESSUNDER ０．４９ＭＰa ボイラ

  14. EXTINCTION MAIN BURNER & STOP FO BURNING PUMP POST – PURGE ( 60 sec ) STOP F.D.F. BURNER AUTOMATIC OPERATION 《 STOP 》 STEAM PRESS REACH to 0.62MPa ボイラ

  15. About the important word・・・ ・PREPURGE This operation is for ventilation before the ignition to prevent a backfire . ・POSTPURGE This operation is for ventilation after the extinction to remove the remaining gas inside the combustion chamber. This operation prevent the corrosion . ボイラ

  16. BOILER WATER TREATMENT • BOTTOM BLOW • SURFACE BLOW • BOILER WATER ANALYSIS • FILTER (FEED FILTER TANK) • APPLING THE CHEMICAL (Tertialy Sodium Phosphate) (Sodium Hydroxide) ボイラ

  17. BOILER WATER ANALYSIS • ＰＨ　(at 25℃） 11.0～11.8 • P-ALKALINITY 80 ～600 ppm • M-ALKALINITY 100 ～800 ppm • Cl－ Max.400 • PO4 3- 20～40 • HARDNESS Max.1 ppm ボイラ

  18. Necessary for BLR water Analysis and treatment ・prevention of sticking the scale When the scale stick on the tube , the place will be superheated. Finally , scale will bring the trouble(burst and crack…).Beside of that, it will be source of decreasing the thermal efficiency. ・prevention of corrosion The place where exposed with boiler water gets the corrotion with efficiency of ionize. ・prevention of carry-over Phenomenon of bringing out the boiler water with steam. It’s will be a source of decreasing the thermal efficiency and corrosion because of impurities inside the boiler water. ボイラ

  19. SAFETY DEVICE • ALARM • LOW WATER LEVEL • HIGH WATER LEVEL • ＦＯ LOW TEMPERATURE • ＦＯ HIGH TEMPERATURE • ＦＯ LOW PRESS • EMERGENCY TRIP • LOWEST WATER LEVEL • ＦＯ LOWEST TEMPERATURE • ＦＯ LOWEST PRESS • IGNITION FAIL • FLAME FAIL • SOURCE FAIL • ＦＤＦ STOP • EMERGENCY STOP (BOILER SIDE & C/R) ボイラ

  20. Burner Maintenance • To keep a good combustion , we have a maintenance in regularly . • Above all,the accumlation of the carbon around the igniter and pilot burner invite the bad ignition. • When the carbon stick around the swirler,it retard the ventilation.

  21. PERFORMANCE OF EXH.GAS ECONOMIZER • HEATING SURFACE ： 340 ㎡ • WORKING PRESSURE ： 0.59ＭＰａ • STEAM TEMPERATURE ： saturated • FEED WATER TEMPERATURE ：60℃ • CAPACITY ： 1000Kg/h ボイラ

  22. BOILER WATER CIRCURATING LINE ボイラ

  23. HeatingTube ボイラ

  24. STEAM LINE & DUMPING SYSTEM STEAM PRESS OVER 6.8kg/c㎡ ボイラ

  25. Dumping valve Set Press : 0.67 MPa ボイラ

  26. Washing the heating tubes Before the washing After the washing

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