What is the basis for controlling the cathode operating pressure at 500 mmH2O in chlorine plant electrolyzers?
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For chlorine engineering cells, the cathode pressure is required to be controlled at 500 millimeters of water column; if it exceeds this limit by 300–600 millimeters of water column, the system will trip. So why is it necessary to keep it at 500 milliliters of water, rather than 400 or 600 or some other value? It might seem like a trivial issue, but I think there must be a reason for it. I hope someone knowledgeable can explain it in detail. Thank you!
This post was last edited by guitarpro0724 on 2016-8-8 at 13:37. I’m not very familiar with chlorine engineering, but the 500mm water column mentioned by the original poster refers to the pressure difference, right? Asahi Kasei electrolytic cells maintain a pressure difference of 400 mm of water column. As for why this value is chosen, I believe there are several reasons: 1. This value ensures that the membrane stays in close contact with the anode mesh; 2. This value is set based on the parameters of most membranes available on the market, so as to prevent the membrane from being damaged due to high pressure. (Compression damage) 3. It is related to the cathode mesh with zero pole distance; both the mesh density and the diameter of the wires used in the mesh have an impact on the membrane under pressure. 4. It is related to the strength of the anode mesh; too large a pressure difference will deform the anode mesh. (For reference)