Regarding wastewater discharge issues in the diaphragm caustic soda process
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This post was last edited by sunjl1981 at 2013-1-6 23:47 for advice: In the production of diaphragm caustic soda, what are the wastewater generated in each section? Wastewater here refers to water that is of no use to this section, including water that is reused in other sections. Salt water section, electrolysis section, hydrogen treatment, chlorine treatment, hydrochloric acid section, caustic soda evaporation section, etc. Thanks! # , , &
Except for the neutralized waste sulfuric acid treated by chlorine before entering the company's sewage system, the wastewater from other systems can have a pH value between 7 and 12 and desalted water can be used for salt treatment. However, wastewater containing free chlorine needs to be neutralized with sodium sulfite.
Can you clarify the process by which they are produced? Or on which device
Name of the wastewater in the section Discharge equipment Continuity Water quality profile Primary salt water accident discharge water Hydrochloric acid high level tank Intermittent acid Primary salt water site flushing water Intermittent pH: 9～10 salt: Intermittent pH of flushing water in trace chlorine treatment sites: 5～9 chlorine treatment, chlorine water, chlorine gas accident, forward and reverse water seal, washing tower water seal, continuous chlorine gas: Approximately 0.39% chlorine treatment chlorine water chlorine scrubber, chlorine cooling tower, wet chlorine demister intermittent chlorine: About 0.39% chlorine treatment 98% sulfuric acid dilute sulfuric acid storage tank, chlorine drying tower, concentrated sulfuric acid storage tank intermittent chlorine: About 0.39% chlorine treatment 10~20% alkali solution, ~7% sodium hypochlorite chlorine accident absorption tower, light chlorine absorption tower, accident tower small water seal, light chlorine tower small water seal intermittent chlorine: About 0.39% liquid chlorine storage and packaging floor flushing water intermittent acid liquid chlorine storage and packaging alkali absorption wastewater accident treatment pool intermittent acid liquid chlorine storage and packaging storage tank cleaning water liquid chlorine storage tank intermittent acid sodium hypochlorite floor flushing water intermittent pH: About 10 secondary brine regeneration wastewater regeneration wastewater intermittent pH: 9～11 Secondary brine pump cooling water, flushing water continuous pH: 9～11 electrolytic washing tank wastewater electrolytic tank intermittent pH: 10 This post was last edited by xywroy on 2008-1-4 13:25 ]