.soot fire  .sf

b) Indication of soot fire:

1. Sudden rise of economizer outlet temperature during normal operation.
2. Economizer outlet temperature remains high despite main engine speed reduction.
3. Smoky funnel
4. Spark emission from the funnel
5. Sudden rise in steam pressure

c) Soot:

Comprises of ‘unburnable’ components in the fuel oil:

1. Ash
2. Carbon Residue
3. Vanadium
4. Products of improper combustion
5. Excessive Cylinder Lubrication

Factor of soot fire:

• Low Quality Residual Fuels
• Prolonged low load operation
• Low Gas Velocity
• Main engine not efficiently operated
• products of improper combustion
• Excessive cylinder lubrication
• Improper boiler water treatment
• Irregular EGE cleaning.
• Irregular soot blowing

Prevention of EGE/EGB fire/Soot fire:

1. Bunkers meet engine specification   
2. Purification of fuel  
3. Avoid running the at low load condition.  
4. Good combustion of ME
5. Maintain correct cylinder lubrication
6. Proper boiler water treatment
7. Regular soot blow
8. Regular EGE cleaning.
9. Regular monitoring of temperature and pressure differential across tube stack

d) Necessary actions for soot /EGE fire:

1. Immediate action is to slow down M/E
2. Stop M/E if fire is confirmed as M/E exhaust gases contain > 17% oxygen
3. Stop auxiliary blowers.
4. seal turbochargers air inlets
5. Keep EGE casing closed from ingress of air or gases
6. Keep boiler water circulating p/p running during fire.
7. Boundary cooling

e) EGE dry running: 

.ege dry   .egedr

1. Permitted during emergency only. 
2. EGE coils should be free of soot accumulation
3. Inlet & outlet v/v fully closed & vent or drain v/v’s fully open. 
4. No ingress of water into tubes. 
5. Refer to manufacturer’s instruction manual M/E load maybe restricted
6. Exhaust gas temp at inlet of EGE may have restriction (<350deg)
7. Soot blowing operation may not be allowed
8. But if there is prolonged low-load operation of main engine operation, then frequent soot blowing operation may be required
9. After repairs, water washing must be carried out before re using EGE