SHELL gasification slag system
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Will circulating P-1402A/B for about half an hour cause the temperature in the circulation pipeline to rise? Why doesn’t valve 14XV-0001 close at all?
The HP make-up water from 14XV-0013 is added downstream of valve 14XV-0001; the pressure of this make-up water is equal to that of P-1402, both being 4.48 MPa, and the temperature is 40°C. When P-1402A/B is in circulation, the water in its circulation circuit and the make-up water can exchange with each other through valve 14XV-0001, so the temperature does not rise, and it is necessary to keep this valve open.
During slag collection, P1402 needs to remain open, and valve 14XV0001 is also kept open at this time; this is because a slurry flow needs to be created during slag collection to facilitate its removal. As for the operating time of this pump, it depends on the actual circumstances, with 20–30 minutes being considered normal. The temperature of the circulation pipeline hardly increases.