PP Vacuum Acid Wash Tank Cleaning Steps:

1. Empty the tank bottom oil (first use the storage tank system pump, then a temporary explosion-proof motor pump or water padding can be used).

2. Blind flange isolation of storage tanks.

3. Disassemble the manhole in the tank wall and the light passageway in the tank roof.

4. Add a small amount of water to the can and steam-cook it.

5. Manhole equipped with explosion-proof blower for forced ventilation and air replacement.

6. Conduct gas analysis inside the can, primarily focusing on oxygen content and flammable gas concentration.

7. After analysis, organize personnel who have passed the physical examination to enter the tank for manual cleaning.

8. Tank loading personnel must wear proper protective gear, and the time spent inside the tank should not be excessive. There must be a designated supervisor outside the tank.

9. Waste is disposed of properly (incinerated in incinerators or buried in designated areas in bags).