Regarding the instability of PSA desorbed gas
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Since the commissioning of our company’s hydrogen production plant, the desorption gas volume has remained unstable, fluctuating around 2,000 cubic meters; this results in an uncontrollable negative pressure in the conversion furnace, with the pressure varying between minus 30 and minus 100.
When adjusting the opening degree of the flushing valve, it should be set to a low value at first; otherwise, water will be released from the start and there won’t be any left later on
With so much desorbed gas, the production capacity must be very high. Is it possible that the buffer tank for the desorbed gas is too small? Should a pressure stabilizing device be installed after the buffer tank for desorbed gas?
Our PSA unit’s flushing is carried out in two steps: Flush 1 and Flush 2. Flush 2 goes directly to the desorption gas pipeline without passing through a buffer tank; later, during a technical modification, Flush 2 was changed to go before the flushing gas tank, but it still didn’t work