When operating equipment such as low-temperature storage tanks and gasifier skids for the first time, dry nitrogen must be used to blow off thoroughly. When blowing off, use nitrogen to first open a small flow rate and then gradually open a large flow rate, and sometimes use a sudden opening of a large valve The way to impact the pipeline valves is to ensure that all pipelines on the entire cryogenic storage tank and gasification skid system are clean and free of impurities and moisture. Depending on the size of the system, the general purge process is 10-60 minutes.
Open the valves on the liquid outlet pipeline of the storage tank to make the liquid outlet pipeline and the liquid inlet pipeline unblocked, and ensure that the bypass of the inlet and outlet pipelines is closed. Cooling, pre-cooling of the main pipeline of the liquid outlet, and the completion of the pre-cooling when the root pipe of the air-temperature vaporizer is frosted. (This step is to pre-cool the pipeline with air-conditioning)
Pre-cool the outlet main pipe and outlet branch line of the target tank. Close the upper liquid inlet valve of the storage tank, open the lower liquid inlet valve, and through the manual liquid outlet pneumatic valve and the rear valve, the liquid in the tank will slowly flow into the liquid outlet main pipe, and the liquid outlet process can be carried out after precooling for 10 minutes.
