Exam Question
Give an outline sketch of Heavy F.O. setting tank heating system and briefly explain the system. Sketch only the low pressure steam inlet upto condensate collection tank (16)
Class 4 (4th Engineer)
MEKG
📅 May 2024
Reference Answer
### Purpose of the HFO Settling Tank Heating System
The primary purpose of heating Heavy Fuel Oil (HFO) in a settling tank is to reduce its viscosity. This is crucial for several operational reasons:
1. **Pumping**: HFO at ambient temperatures is often too viscous to be pumped efficiently. Heating reduces viscosity to a pumpable range (typically around 100-180 cSt).
2. **Purification**: For effective centrifugal purification (separation of water and solids), the fuel viscosity must be lowered to a specific value recommended by the purifier manufacturer. This ensures efficient separation density difference.
The primary purpose of heating Heavy Fuel Oil (HFO) in a settling tank is to reduce its viscosity. This is crucial for several operational reasons:
1. **Pumping**: HFO at ambient temperatures is often too viscous to be pumped efficiently. Heating reduces viscosity to a pumpable range (typically around 100-180 cSt).
2. **Purification**: For effective centrifugal purification (separation of water and solids), the fuel viscosity must be lowered to a specific value recommended by the purifier manufacturer. This ensures efficient separation density difference.
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