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A kind of advanced treatment and reuse method of olefin polymerization catalyst production wastewater

A technology for olefin polymerization and wastewater production, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Effect

Active Publication Date: 2011-12-28
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method for membrane advanced treatment and reuse of wastewater produced by olefin polymerization catalysts using a membrane separation coupling process, the purpose of which is mainly to remove a large amount of salt, a small amount of COD and other pollutants in the wastewater, Solve the problem of reuse of wastewater produced by existing olefin polymerization catalysts, reduce sewage discharge, improve water resource recovery rate, and make the water produced by the system meet the requirements of sewage reuse

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  • A kind of advanced treatment and reuse method of olefin polymerization catalyst production wastewater
  • A kind of advanced treatment and reuse method of olefin polymerization catalyst production wastewater
  • A kind of advanced treatment and reuse method of olefin polymerization catalyst production wastewater

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Embodiment Construction

[0035] The specific steps of the present invention will be described below in conjunction with the accompanying drawings of the present invention.

[0036] The waste water is firstly treated by the ultrafiltration unit 1, and then enters the reverse osmosis concentration system 2 for desalination, the reverse osmosis produced water is reused in the production process, and the reverse osmosis concentrated water enters the membrane distillation unit 3 for high concentration after heating, and the membrane distillation produces The water is reused in the production process or as desalinated water, and a small amount of concentrated water remaining from membrane distillation is disposed of in a centralized manner.

[0037] The typical water quality analysis results of olefin polymerization catalyst production wastewater biochemical effluent are shown in Table 1.

[0038] Table 1 Biochemical effluent quality of olefin polymerization catalyst production wastewater

[0039]

[0040...

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Abstract

The invention relates to an advanced treatment and reuse method of wastewater in olefin polymerization catalyst production. In the method, a coupled process flow comprising ultrafiltration, reverse osmosis and membrane distillation is adopted; by using the process flow, the advanced treatment and reuse of biochemical effluent of wastewater in the olefin polymerization catalyst production can be achieved; and produced water by reverse osmosis and membrane distillation of the biochemical effluent treated by the process flow of wastewater in the olefin polymerization catalyst production can meetthe process water requirement. According to the invention, the recovery rate of the whole system is up to above 90%, thereby realizing the reuse of the biochemical effluent of the wastewater in the olefin polymerization catalyst production and realizing the advanced treatment and reuse of high-salt sewage. Thus, the method provided by the invention has obvious social benefits.

Description

technical field [0001] The invention relates to a method for advanced treatment and reuse of waste water produced by olefin polymerization catalysts by using membrane separation technology, and belongs to the field of industrial waste water treatment. Background technique [0002] A large amount of wastewater will be generated during the production of olefin polymerization catalysts. The wastewater contains various pollutants such as petroleum and benzene series, and its COD concentration is higher than 10,000mg / L. At present, the waste water can basically meet the discharge standard after being treated by the method described in the patent CN1257851C (oil separation sediment + pH adjustment + flocculation air flotation + acid hydrolysis + contact oxidation). However, in recent years, the country has become more and more strict on the reuse of sewage. Therefore, this unit of wastewater is also in urgent need of effective treatment and reuse methods. The waste water has a hi...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/44
CPCY02A20/131
Inventor 张新妙李井峰王玉杰杨永强
Owner CHINA PETROLEUM & CHEM CORP
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