Pressure issues in hydrogen recovery (PSA)
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The project I am working on involves PSA hydrogen production, with a capacity of around 40,000 cubic meters. It’s not determined yet, but it seems there will be a vacuum pump. Where does the exhaust gas from the reverse playback and analysis steps of PSA go? Generally, is it to the gas pipeline? Is the pipeline pressure stable? What is the maximum reverse pressure? What is the minimum outlet pressure of a vacuum pump? Who has relevant experience or data to offer some guidance?
1. A vacuum pump isn’t necessarily required; purging should also work. 2. The pressure in pipelines installed in reverse order cannot remain constant at one value; it should fluctuate within a certain range. 3. The gas generated as a result of this reverse installation is usually sent to the flare
I remember that in a previous setup I was involved with, the gas was analyzed and then burned in a waste treatment furnace. Also, it seems that the reverse blowing effect isn’t as good as that of vacuum, right? It didn’t answer the question I needed. . . . . .
The purge gas can be washed with hydrogen; if you use hydrogen for washing, you can keep the pressure at around 2.5–3 MP. The inlet pressure for PSA should be set at around 5.7 MP. The pressure for hydrogen recovery should be the same as that of the fresh gas. I don’t think a vacuum pump is necessary, but more components might be required for the adsorption tower, resulting in a higher number of cycles per unit volume.
Purging does not require any moving equipment, but it results in some loss of hydrogen, which lowers the yield. Vacuum pumping yields a higher yield, but it requires additional moving equipment, namely vacuum pumps! Choose depending on the situation!
Vacuuming requires a high level of safety for the equipment
It’s not a major issue; I’m asking about the pressure at the outlet of the vacuum pump. . . . . . For a unit with a capacity of over 40,000 cubic meters operating continuously, I use reverse blowing – how much air needs to be released per year?