Chlorine plant cell fails to start
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Our company has two electrolyzers of the same model for chlorine production, with an annual output of 5 wt each; there is also one turbine and one hydrogen compressor. Each electrolyzer is equipped with a rectification system. I would like to ask: is there any company that has a similar setup to ours? Is it possible for one electrolyzer to trip while the other continues to operate, without tripping due to pressure difference interlocks? Since we have not encountered such a situation where a single cell trips, it is estimated that this issue can only be caused by problems with the transformer. An experienced expert can share the processing process. Thanks!
One thing is certain: during the operation of the electrolyzer, the pressure difference interlock must be activated. When the pressure difference reaches the set protection value, a protection action is triggered, causing the rectifier-transformer to lose power; the loss of power to the rectifier-transformer in turn triggers the hydrogen compressor and chlorine compressor to stop operating. Conversely, if the trip is not caused by a pressure difference but rather by a fault in the transformer that results in the tripping of one cell, as long as the pressure difference does not reach the protection level, it is possible to prevent the other cell from tripping by making timely adjustments. Similar situations have been handled twice: 1) balancing the chlorine pressure in a timely manner, and 2) adjusting the valve position of the main hydrogen pipeline to control whether hydrogen is sent outside for electrolysis, which helps avoid system shutdown. Of course, this requires proper supervision as well as skilled coordination among various team members.
Thank you for your reply, I’ve learned it!
As long as it is properly controlled and all positions cooperate effectively, it generally won’t come to a complete stop
This post was last edited by nanren2 on 2016-11-5 08:29. In a system with two electrolyzers, if one of them stops operating, and 50% of the load is removed, it is generally not possible to get that electrolyzer back online! Of course, some manufacturers use gas tanks to balance the electrolytic hydrogen system; chlorine is kept under control by positive and negative water seals to prevent abnormal pressure levels. The operating pressure is low in such cases, which may give a chance to salvage the situation! Different companies have different configurations, and their methods for dealing with abnormal situations vary as well, resulting in different outcomes! This is a bit off-topic; please forgive me!