Study On The Cyclonic Separation Mechanism Of Flotation

At present,serious harm has been caused by coking wastewater to human beings,crops and environment.In order to improve the pollution problem of coking wastewater and treat coking wastewater more cost-effectively,this study took the coking wastewater of a certain enterprise’s third-stage renovation project as the target wastewater,and based on the systematic analysis of the form and concentration of cyanide in the coking wastewater.The system was optimized for the original ferrous sulfate precipitation process,and then the NaClO oxidation method and the composite cyanide precipitation method were used to carry out in-depth treatment of total cyanide in coking wastewater.The research of this paper can provide a theoretical basis for the removal of cyanide in coking wastewater and provide technical support for the optimization of the cyanide removal process in coking wastewater..The experimental results showed that during the cyanide removal process of the coking wastewater biochemical effluent by the ferrous sulfate precipitation method,the optimal reaction conditions are:pH=5,the optimal dosage of FeSO₄·7H₂O was500 mg/L,the optimal stirring intensity was 200 r/min,the optimal reaction time was15 min,and the optimal standing time was 30 min,the residual total cyanide concentration in the wastewater was 0.65 mg/L,the wastewater needed advanced treatment.Then,the NaClO oxidation method and the composite cyanide precipitation method were used for the deep treatment of the total cyanide.By comparing and analyzing the treatment effects of the two processes,it can be seen that during the deep treatment process using the NaClO oxidation method,when the pH is 12,NaClO When the dosage is 1500mg/L,the stirring intensity is 200r/min,and the reaction time is 90min,the total cyanide remaining in the wastewater after treatment is about0.3mg/L;in the process of using the composite cyanide precipitation method,the first addition The pre-mixed reagent A and reagent B were stirred at 200r/min for15min,and then 2mg/L of reagent C was added for 3min,and allowed to settle for 5min.The final total residual cyanide concentration in the wastewater It is 0.09 mg/L,which shows that the total cyanide in the coking wastewater from the composite cyanide precipitation method has a better removal effect.This article provides a theoretical basis for the removal of cyanogen in the coking wastewater of the company,discusses a more optimized cyanogen removal process for coking wastewater,and provides technical support for the industrialization of coking wastewater.