Application practice of sodium hydrosulfide in coking plant
The recycling principle of NaHS was introduced.A method of using NaHS byproduct produced in H2S treatment to replace NaOH added in ammonia distillation process was proposed and verified through production operation.The operation results showed that after adding NaHS solution,the NH3-N content and pH value in the wastewater at the outlet of ammonia distillation met the control requirements,and 50%NaOH could be saved.Calculated based on NaOH market price of 1650 RMB per ton,1.38 million RMB could be saved per year.
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