Study And Optimization Of Desulfurization Wastewater Salt Extraction Technology Of Coking Enterprises

H₂S and HCN need to be desulfurized and cyanogened treated before recycling and processing,otherwise it will cause equipment corrosion and product quality degradation.However,?NH₄?₂S₂O₃ and NH₄SCN are often generated in the process,which reduces the desulfurization efficiency.If the desulfurization wastewater discharged,it will cause pollutions.If the desulfurization wastewater purified and recycled,it can not only create good economic benefits,but also achieve the purpose of environmental protection.Two types of HPF desulphurization wastewater treatment techniques were studied in this paper,the main operating conditions,equipment transformation and concentration were researched.Firstly,?NH₄?₂SO₄ and 98% NH₄SCN crystals have been obtained through?NH₄?₂S₂O₃ with the addition of adjuvant.Besides,the close relationship between experiment conditions and purity samples is systematically ascertained.Secondly,the shortcomings of the old process in salt extraction were discussed and the improved method of the new process in salt extraction was expounded.In this process,99.4% NH₄SCN were obtained.Compared to the old technology,the new process is especially suitable for the preparation of NH₄SCN crystals due to the convenient of operation,high efficiency of equipments and high purity of crystals.Finally,the content and concentration influence of?NH₄?₂S₂O₃ and NH₄SCN in the desulfurization liquid were obtained.The results show that the new process of salt extraction can create considerable economic benefits,realize the balance goal of benefit and environmental protection.Figure 9;Table 22;Reference 45...