Oil In Cascade Tank (Hot well) Cause And Action
Author Name :
DG Shipping
Date
Monday, December 12, 2022
Oil In Cascade Tank (Hot well) Cause And Action
Cause
- Most probable cause is leaky fuel oil heaters. Any leaks in oil heaters leads oil in cascade tank.
- Deck cargo tank steam line leak
Action
- Reduce load on boiler
- Keep a watch on Observation tank oil level
- With proper PPE Open top cover of Cascade tank.
- If less oil, drain it from top or add a chemical that breaks the oil infine particles.
- If more oil, manually remove it by absorband pads or remove it by weldon pump from top.
- In no case emulsified water to go in boiler.
- Once leak identified shut down boiler if necessary.
- Shut the I/L valve to Atm. Condensor.
- Check Atm.Condensor drain for oil traces in atm. Condensor. If yes flush it completely.
- Check boiler water condition from sampling line. Find out if any oil present in boiler.If yes Do a Scum blow down.
- Take a sample again, if oil traces that means boiler too much contaminated, then completely blow down the boiler.
- Make sure Of MARPOL ANNEX 1 in this case.
- Oil content to be <15 ppm Or We would have to drain in Bilges or Collect it in a seperate drum then give it to Port reception.
- Flush clascade tank after cleaning
- Flush Boiler with FW
- Check cascade water samples
- Once all samples ok Take water in cascade tank
- Take water in boiler
- Do Cold firing
- Increase the load slowly
- See how much time it takes for the steam to rise.
- If it takes more time, that means oil is still present and will take more time to raise steam.
- Proceed further according to action req.
How to Find Out Leaks
- If ER leak check heaters= open heater drains and confirm.
- If ER tanks heaters leak = open the steam trap drain and confirm.
- If Deck cargo tank steam lines leak = open return lines and check on deck.
- If a Observation tank is given on deck, then check there.
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