焦化废水浓盐水的处理难点与工艺设计优化

Difficulties in Treating Concentrated Brine from Coking Wastewater and Optimization of Process Design

项目为焦化废水浓盐水的处理,存在的技术难点是COD实际降解难度大,且进水中硅含量较高,导致后续处理过程中极其容易出现结垢、堵塞问题。为解决上述问题,项目人员对废水的特征进行全面分析,在此基础上对处理工艺加以优化。具体实现环节中科学使用除硅药剂,采取了混凝+管式膜除硅法,由此完成对传统沉淀方法的替代。在COD的处理上,使用了催化剂与溶气装置。并且对膜系统进行了调整,降低了COD与TDS对高压反渗透膜的影响。本项目最终取得预期成果,不仅能够降低焦化废水浓盐水的处理难度,而且也完成了对废水处理工艺的优化,具有较高的经济效益与环保价值。

The project is for the treatment of concentrated brine from coking wastewater.The technical difficulties are the difficulty in actual COD degradation,and the high silicon content in the influent,which makes it extremely easy for scaling and blockage problems to occur in the subsequent treatment process.To address the above issues,project personnel conducted a comprehensive analysis of the characteristics of wastewater and optimized the treatment process based on this.In the specific implementation process,the scientific use of silicon removal agents has been achieved by adopting the coagulation+tubular membrane silicon removal method,thereby replacing the traditional precipitation method.In the treatment of COD,catalysts and gas dissolving devices were used.And the membrane system has been adjusted to reduce the impact of COD and TDS on the high-pressure reverse osmosis membrane.This project ultimately achieved the expected results,not only reducing the difficulty of treating coking wastewater with concentrated brine,but also optimizing the wastewater treatment process,which has high economic benefits and environmental value.