化工进展 ›› 2019, Vol. 38 ›› Issue (11): 5165-5172.DOI: 10.16085/j.issn.1000-6613.2019-0237

• 应用技术 • 上一篇    下一篇

旋流分离技术在甲醇制烯烃工艺废水处理中的应用

王天翔1(),陈建琦2,马世浩2,刘冰2,党志宏2,吕文杰2()   

  1. 1. 陕西延长石油延安能源化工有限责任公司,陕西 延安 727500
    2. 华东理工大学化学工程联合国家重点实验室,上海 200237
  • 收稿日期:2019-02-20 出版日期:2019-11-05 发布日期:2019-11-05
  • 通讯作者: 吕文杰
  • 作者简介:王天翔(1985—),男,工程师,从事低碳烯烃应用领域技术研究。E-mail:wtx342655903@126.com

Application of cyclone separation technology in treatment of methanol-to-olefin process wastewater

Tianxiang WANG1(),Jianqi CHEN2,Shihao MA2,Bing LIU2,Zhihong DANG2,Wenjie LÜ2()   

  1. 1. Shaanxi Yanchang Petroleum Yan’an Energy Chemical Co. , Ltd. , Yan’an 727500, Shaanxi, China
    2. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2019-02-20 Online:2019-11-05 Published:2019-11-05
  • Contact: Wenjie Lü

摘要:

旋流分离技术在液-固分离和油水分离方面有广泛的应用,针对甲醇制烯烃废水处理中存在的问题,分别研究了急冷水旋液分离器和水洗水旋流除油器,应用于急冷水中催化剂微粉的脱除及水洗水中的油蜡类物质的分离。研究成果应用于某化工企业180万吨/年DMTO装置的水处理系统,并对其急冷水和水洗水水质进行了长期的监测,主要监测指标为急冷水旋液分离器进出口悬浮物含量和水洗水旋流除油器进出口油含量。工业运行结果表明:急冷水一级旋液分离器和二级旋液分离器的效率分别能达到50%和80%,对急冷水进行了有效的澄清,同时对外排相进行了有效的提浓;水洗水除油器的分离效率可达到60%,对油蜡类物质具有较好的分离效果。旋流分离技术的应用,减少了水系统中管路及设备堵塞,保证了装置的稳定运行。

关键词: 甲醇制烯烃, 旋流分离技术, 废水, 催化剂, 油蜡, 多相流

Abstract:

The hydrocyclone separation technology has been widely used in liquid-solid separation and oil-water separation. Hydrocyclone separator of quench water and de-oiling hydrocyclone of wash water were studied separately in order solve the problems of methanol to olefin wastewater treatment. The hydrocyclone separator is used for the separation of catalyst particles in quench water. The de-oiling hydrocyclone is used for the separation of oil waxes in wash water. Our work are applied to the water treatment system of the DMTO unit with a capacity of 1.8 million tons/year in a chemical company. The quality of quench water and wash water had been monitored for a long term. The monitoring indicators were suspended solids content at the inlet and outlet of the hydrocyclone separator and oil content at the inlet and outlet of the de-oiling hydrocyclone. Industrial operation results show that the efficiency of the quench water first-stage hydrocyclone and the two-stage hydrocyclone can reach 50% and 80% respectively. The hydrocyclone separator effectively clarifies the quench water, and the external phase is effectively enriched. The separation efficiency of the de-oiling hydrocyclone can reach 60%,which effectively separates the oil waxes of wash water. The application of hydrocyclone separation technology reduces pipe and equipment blockage in water system, which ensures the stable operation of the device.

Key words: mhaoethanol to olefin, hydrocyclone separation technology, waste water, catalyst, oil wax, multiphase flow

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