Device and method for treating high-salinity wastewater with forward osmosis technique

A technical treatment, high-salt technology, applied in the treatment process of high-salt wastewater, the field of forward osmosis membrane technology, can solve problems such as high-salt wastewater, achieve long-term stable operation, wide applicability, and high economic benefits Effect

Inactive Publication Date: 2016-06-29
BEIJING E & E TECH
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  • Device and method for treating high-salinity wastewater with forward osmosis technique

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Embodiment 1

[0030] The forward osmosis process flow of the present invention using the above-mentioned device to treat high-salt waste water is as follows: the waste water in the high-salt waste water tank 1 is respectively subjected to precipitation treatment and separation membrane treatment of the pretreatment system to initially remove large particles in the waste water to prevent Fouling plugging membrane module; the high-salt wastewater treated by the separation membrane enters the fresh water chamber of the electrodialyzer 4, and under the action of the electric field, the cations in the high-salt wastewater pass through the cation exchange membrane and move to the cathode, while the anions permeate Pass through the anion exchange membrane, move to the anode, use the concentration difference between concentrated water and fresh water and the dual action of the electric field to remove ions in the high-salt wastewater; the wastewater flowing out of the fresh water chamber enters the r...

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Abstract

The invention relates to a device and a method for treating high-salt wastewater by forward osmosis technology, belonging to the technical field of water treatment. The pretreated high-salt wastewater first passes through the fresh water chamber of the electrodialyzer, and the ions in the wastewater migrate to the concentrated water chamber under the driving force of the concentration difference and the potential difference, so that the salt content in the wastewater is reduced to a level suitable for forward osmosis. Conditions of technical processing. Then it is further concentrated through the forward osmosis membrane element, the water in the wastewater enters the draw liquid side from the raw material liquid side of the forward osmosis membrane, and then the obtained diluted draw liquid is concentrated, dehydrated and regenerated through the membrane distillation membrane module, and the concentrated draw The liquid is recycled in the forward osmosis process, and very pure product water is obtained. The method has wide applicability to high-salt wastewater, and has the advantages of long-term stable operation and high economic benefits.

Description

technical field [0001] The invention relates to a treatment process for high-salt wastewater, in particular to a forward osmosis membrane technology and belongs to the technical field of water treatment. Background technique [0002] High-salt wastewater mainly comes from chemical plants and oil and natural gas collection and processing. This wastewater contains a variety of substances (including salt, oil, organic heavy metals and radioactive substances). High-salt wastewater can be generated in a wide range of ways, including shale gas and coalbed methane mining wastewater, silver nitrate wastewater, titanium dioxide wastewater, copper sulfate industrial wastewater, pharmaceutical wastewater, printing and dyeing wastewater, oilfield wastewater, air-conditioning cooling water, gas washing wastewater, desalinated water System drainage, concentrated water discharge of reuse water system, biochemically treated organic wastewater, etc. The organic matter in high-salt organic ...

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Application Information

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IPC IPC(8): C02F9/10C02F1/44
CPCC02F9/00C02F1/44C02F1/445C02F1/447C02F1/4693
Inventor 张如意徐愿坚韩君王献德温琦周建强杨立鹏吕学欠
Owner BEIJING E & E TECH
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