JINChang-lin.Pilot Study on Re-concentration and Reduction of Concentrated Liquid from Membrane Separation of Coking Wastewater[J].China Water & Wastewater,2024,40(9):31-34.
焦化废水膜分离浓水再浓缩减量化中试研究
- Title:
- Pilot Study on Re-concentration and Reduction of Concentrated Liquid from Membrane Separation of Coking Wastewater
- Keywords:
- coking wastewater; re-concentration and reduction; ozonation; electrocatalytic oxidation; DTRO; membrane separation
- 摘要:
- 焦化废水回收过程中产生的浓缩液再回收及零排放需求越来越迫切。基于此，提出采用臭氧+电催化氧化+碟管式反渗透膜（DTRO）工艺来实现焦化废水膜分离回收后，剩余浓水再浓缩减量化；在进水量为1.0 m3/h条件下，控制臭氧量为200 g/h、电催化氧化电极析氧电位为2.1~2.4 V及高压DTRO产水压力等级为6.8 MPa进行试验。结果表明，臭氧+电催化氧化+ DTRO工艺对COD的去除率达到94.96%，废水平均回收率达到80.5%，平均脱盐率达到98%以上；DTRO化学清洗周期不少于1个月且性能恢复好。产水水质稳定达到《工业循环冷却水处理设计规范》（GB/T 50050—2017）中的再生水用于间冷开式循环冷却水系统补充水的水质标准。
- Abstract:
- The demand for further recovery and zero discharge of the concentrated liquid produced in the recovery process of coking wastewater has become more pressing. In this study, the process consisting of ozonation, electrocatalytic oxidation and dish tube reverse osmosis membrane (DTRO) was proposed to concentrate and reduce the residual concentrated liquid from coking wastewater after membrane separation. The experiment was carried out with the following parameters: influent flow of 1.0 m3/h, ozone concentration of 200 g/h, oxygen evolution potential of electrocatalytic oxidation electrode of 2.1-2.4 V and high-pressure DTRO water production pressure of 6.8 MPa. The process demonstrated the removal rate of 94.96% for COD. The average wastewater recovery rate reached 80.5%, and the average desalination rate was more than 98%. The chemical cleaning cycle of DTRO was not less than 1 month and good recovery performance was obtained. The quality of the produced water stably met the quality requirement of reclaimed water used as make-up water for intercooled open circulating cooling water system specified in Code for Design of Industrial Recirculating Cooling Water Treatment (GB/T 50050-2017).
相似文献/References:
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