Energy saving and consumption reduction in the ion-exchange membrane process for alkali production
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This post was last edited by sunjl1981 on 2013-1-6 21:19. Dear colleagues: Our company uses electrolyzed brine to produce caustic soda. In your factory, which employs the same process, what measures have been taken to save energy and reduce consumption? Suggestions for energy-saving and consumption-reduction measures in the primary brine section, chlorine treatment section, hydrochloric acid section, liquid chlorine section, and secondary brine section are widely sought; the more detailed the suggestions, the better. I hope all experts will not hesitate to share their insights, and I thank them in advance! # + + . hcbbs
This post was last edited by tclvjian on 2012-1-10 at 15:49. Dear Xiao Wanzi: Keep the amount of alkali in the brine at the lower limit of the specified range, and control the sulfate level at the upper limit of that range. Increase the temperature of the electrolysis cell, maintain a constant room temperature, conduct comprehensive tests on the reclaimed wastewater, and ensure that all process parameters are well controlled. The consumption of hydrogen chloride and sulfuric acid is crucial; reduce the temperature of chlorine gas…… There’s so much to cover. In short, by controlling the parameters for each stage of the process, energy savings and reduced consumption can be achieved :)
Reply to 2# tclvjian: The control of process parameters is quite reasonable here. What we’re looking for are some more practical measures to save energy and reduce consumption! I would like to ask you, sir: does your factory have any devices for producing pure water using reverse osmosis? ! I am currently researching ways to reduce the consumption of pure water! Could you give some advice? Thanks! I’m also relatively new to this field, and I don’t know much about many of the techniques involved. Please give me some advice!
This post was last edited by tclvjian on 2012-1-11 at 11:21. Relying solely on strict control of process parameters won’t lead to significant savings in terms of energy consumption; there’s no need to overthink the issue of pure water as well. It would be more practical to make good use of the hydrogen gas produced by your electrolyzer. Do you have any devices that require hydrogen gas in your downstream processes? Except for hydrochloric acid.
Reply to 4# ftcai: Yes, only a very small portion of the hydrogen is used in the production of hydrochloric acid; the rest of the hydrogen is sold off, with no waste at all. The revenue from hydrogen is a very significant source of income for our factory. I’m very grateful that you thought of this. Is there anything else?
Reply to 5# wuyan1987wu: Is the recycled wastewater from the secondary saltwater process being reused?
Reply to 6# ftcai: It seems that the water from acid washing and alkali washing was thoroughly mixed together before being used for primary salt formation. What about yours? Is it the same here too?
Reply to 2# tclvjian: The hydrogen produced by our factory has been sold to an oil refinery!
The wastewater from acid washing and alkali washing can still be utilized; the cost is too high
Reply to 9# wqhhwyp: What does this friend mean? Could you please explain in detail whether the wastewater resulting from acid washing and alkali washing is used or discarded?
We have successfully tested the recovery of heat value from hydrogen combustion in our facility. High requirements for security