Problems with newly installed electrolyzers
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This post was last edited by sunjl1981 on 2013-1-6 at 20:54. Dear colleagues and friends: Our company has newly installed a 300,000-ton ion-exchange membrane caustic soda production unit, using tanks from chlorine processing projects and 3K turbines. For filling with liquid, the anode should be set at -50 mmH2O (all values are in mmH2O); the cathode should be set at 500. For the main pipeline, the anode value should be 350 and the cathode value 850. When starting up the first electrolyzer, liquid should be filled first, after which it should be connected to the turbine and hydrogen pump (which means turning on PV-2001 and PDV2003A) ； Should I connect it to the turbine and hydrogen pump first, and then fill it with liquid? # + + . hcbbs
Your meaning isn’t very clear; I can only help you based on my own understanding. At the start of operation, the cathode system is filled with fluid, and the pressure of the nitrogen gas introduced is adjusted to the required value using PDV2002B. When filling the anode system, open valve PV2003 and you can use your exhaust fan for that. Before switching gases after power supply, start the chlorine compressor and the hydrogen compressor. These are all in your operation manuals; take a close look, haha.
What was said upstairs is correct; before starting the vehicle, do not connect it to the hydrogen pump or turbine. Control the pressure through 2001B and 2003B in order to reduce risk factors. Start the hydrogen pump and turbine only after the current reaches 4-5 amperes at 3KA； Finally, switch to the two A valves so that the subsequent section can operate under load.
I’m going to drive in August, and the workshop plans to try both methods to find one that is both safe and smooth. In the words of our leader: Don’t be afraid to put in the effort!
1. The procedure should involve flushing the electrolyzer tank first, before turning on the hydrogen pump and the turbine; it is necessary to confirm that the electrolyzer is functioning properly before connecting it to the grid. This is applicable after the individual testing of the hydrogen pump and turbine as well as their combined operation has been completed. 2. Before connecting chlorine and hydrogen to the grid, the pressure difference is controlled by means of hydrogen flushing, as well as by the fans in the nitrogen and chlorine waste gas towers. 3. For grid connection, chlorine should be supplied first, followed by hydrogen. Hydrogen is released through the hydrogen water seal, and the pressure is controlled using a manually operated remote valve. Once the current reaches 3KA, electrolysis can proceed normally along with the supply of chlorine.