Is it necessary to install a safety valve behind the chlorine compressor in chlor-alkali production?
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After chlorine is removed from the electrolyzer, it undergoes drying before entering the chlorine compressor. This compressor features three stages of compression, and it does not come equipped with a safety valve of its own. The chlorine produced by the compressor is sent to various locations where it is used through a distribution system; in case of any abnormalities, the chlorine is directed to an accident chlorine absorption tower (operating under negative pressure). Is it necessary to install a safety valve after the chlorine compressor?
The burst disc and safety valve are connected in series, with the outlet of the safety valve leading to a pipe that connects to a recovery device or tank
For the distribution station, it is sufficient to install an explosion-proof membrane and a safety valve; for the chlorine compressor, a pressure relief valve with high-pressure interlock can be set up
It depends on whether there will be a blockage downstream, which could cause the compressor to operate under pressure; and also on whether the high pressure from downstream can backflow and affect the compressor after it stops running
Isn’t there a cooler between the stages of the third-stage compression? Doesn’t the cooler have an alarm? Also, excessive pressure of chlorine gas in the compressor can enter the lubricating oil system through the gas seal, causing the lubricating oil to acidify. There are many safety protection systems in place; the safety valves installed on the pipes you mentioned are part of these protective measures. You need to ensure that all the prior protections are in place before considering whether to add additional ones.