基于新型微通道分离技术的甲醇制烯烃废水处理  

Methanol to olefin wastewater treatment based on a novel microchannel separation technology

作　　者：黄起中 刘冰 马红鹏 吕文杰[2] HUANG Qizhong;LIU Bing;MA Hongpeng;LYU Wenjie(China Energy Yulin Chemical Co.,Ltd.,Yulin 719000,Shaanxi,China;National Engineering Laboratory for Industrial Wastewater Treatment,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]国能榆林化工有限公司,陕西榆林719000 [2]华东理工大学工业废水处理国家工程实验室,上海200237

出　　处：《化工进展》2023年第2期669-676,共8页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(52170075)。

摘　　要：甲醇制烯烃(MTO)开辟了一条制取低碳烯烃的新途径,但由于MTO反应器内旋风分离器分离精度的限制,微细催化剂颗粒会进入后续的水系统,从而产生大量废水。MTO急冷废水中微细颗粒的分离是实现废水回用的关键,针对目前MTO废水处理技术的不足,本文提出一种新型的旋流再生型微通道分离技术处理MTO废水,并建立了处理量为50t/h的工业级实验装置进行长周期分离实验。结果表明:该装置在处理MTO废水中具有较好的性能,平均悬浮物含量从143mg/L降至22mg/L,分离媒质的平均悬浮物残留率在2%以下。该技术具有运行周期长、对悬浮物去除效率高、运行压降低、分离媒质再生彻底等特点,技术的成功应用有效缓解了甲醇制烯烃装置水系统的堵塞,并极大地节约水资源和减少环境污染。Methanol-to-olefin(MTO) opens up a new way to produce light olefins. Due to the limitation of the separation accuracy of the cyclone separator in the MTO reactor, the fine catalyst particles will enter the water system, resulting in large amounts of wastewater. The separation of fine particles in MTO quench wastewater is the key to realize wastewater reuse. In view of the shortcomings of the current MTO wastewater treatment technologies, a novel swirl regenerating microchannel separation technology was proposed to treat MTO wastewater, and an industrial-scale device with a treatment capacity of 50t/h was established. The device had good performance in the treatment of MTO wastewater, the average suspended solids content decreased from 143mg/L to 22mg/L, and the average suspended solids residual rate of the separation media was below 2%. The technology had a long operating cycle and high removal efficiency for suspended solids. The operating pressure was low, and the separation media were completely regenerated. The successful application of the technology had effectively alleviated the blockage of the water system of the methanol-to-olefins unit. Water resources were greatly saved and environmental pollution was reduced.

关 键 词：甲醇制烯烃 废水 微通道型分离 旋流再生 催化剂 

分 类 号：TQ051.8[化学工程]