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I’d like to share with you some minor improvements and innovations for chlor-alkali plants

2022-04-10View Original

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Hello, dear colleagues. I’d like to share here some minor improvements made to the chlor-alkali production facility. I also ask everyone to share their own successful improvements as well, so that we can all improve together: handshake ① All the desalinated water and concentrated water are used for flushing the toilets in the office buildings and the production area; ②After the pH value of the acid wash water from the resin tower is adjusted, it is all sent to the primary brine mixing tank for desalination purposes ; ③Dechlorinated brine is prepared without sodium hydride; only alkali is used to adjust the pH to around 5. Some of this brine has its pH adjusted to above 9 before being sent to the water mixing tank, where it undergoes salt dissolution ; Another portion undergoes denitration, with sodium hydride added further to remove free chlorine before denitration takes place. ④Hot exchange between wet chlorine gas and brine ; ⑤The wash water from the hydrogen scrubber is used to absorb hydrochloric acid-containing exhaust gases, and then it is sent for desalination ; ⑥In the pipeline for removing accidental chlorine using the Na2SO4 pump in the packaging process, a mist catcher is added before the accidental chlorine is absorbed, thereby preventing impurities such as acid and rust from contaminating the quality of sodium hypochlorite. The above points are meant to serve as a starting point for discussion; I hope fellow sailors will offer their guidance and share their own small improvements and innovations: handshake
Reply #22022-04-11
All the concentrated water from desalination is used for flushing toilets in the production office buildings and the production facilities
Reply #32022-04-12
Pure water heated by the hydrogen main pipeline and fed into the electrolyzer
Reply #42022-08-02
After heat exchange with brine, wet chlorine gas undergoes heat exchange with hydrogen
Reply #52022-08-22
Recycling used ion exchange membranes. WeChat: i591314i
Reply #62022-08-28
This post was last edited by “Wife used for soothing” on August 28, 2022, at 23:57. ③ For the dechlorinated brine, no sodium sulfite is added; only alkali is used to adjust the pH value to around 5. Part of this brine has its pH value raised to above 9 using alkali before being fed into the mixing tank, where it mixes with chlorinated dilute brine to dissolve salt; Another portion undergoes denitration, with sodium hydride added further to remove free chlorine before denitration takes place. Isn’t there a risk that incomplete removal of residual chlorine could lead to serious production accidents in the secondary brine? Where was Yana added later on?

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