Purging of liquid air separation plant 

1. The purpose of the blowing is to clean out the residual slag, aluminium chips and other debris from the piping and vessels.
2. the air source for blowing is provided by the turbine compressor, and the air cooling tower must be activated. 3.
3. blowing principle, first outside the tower, after the tower, blowing brush to be one after another, in the blowing with the air pressure: low pressure system. Should be maintained at 40 a 50kpa high pressure system: should be maintained at 250 ~ 400kPa blowing pressure shall not exceed the working pressure of the container and pipeline, the flow rate should not be less than 20 / s
4. In the system blowing, turbine expander booster liquid pump inlet and outlet pipe should be disconnected, its inlet pipe on the filter core, all the orifice flow meter orifice plate should also be removed.
5. cold box outside the pipeline blowing, where the door connected to the cold box, should be to spoil into the door and tower.
6. The blowing of the meter tube. Should be carried out in the late blowing brush. Blowing of each system should be repeated several times blowing time should not should be less than 4 hours.

7. Checking whether the blowing bottom is restored or not. The white short-sheet paper and white cloth can be wetted and placed at the outlet of the mouthpiece. After 5 minutes, it should be clean without obvious mechanical impurities as qualified.

Dear Air carries out strict purging of liquid air separation plant and small air separation unit and large air separation unit

and  prior to installation.