Reverse osmosis membrane treatment process for recycling industrial sewage and realizing zero release

A technology of industrial sewage and treatment process, which is applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. higher question

Inactive Publication Date: 2015-01-14
上海水合环境工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a reverse osmosis membrane treatment process for industrial sewage reuse and zero discharge, aiming at the current environmental protection requirements of the country and the requirements of enterprises for zero discharge and high reuse rate of sewage, i...

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  • Reverse osmosis membrane treatment process for recycling industrial sewage and realizing zero release

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Embodiment Construction

[0031] see figure 1 , The invention discloses a reverse osmosis membrane treatment process for industrial sewage reuse and zero discharge. As shown in the figure: it is softened by lime to remove alkali clarification tank 1, filter tank 2, ultrafiltration device 3, primary reverse osmosis device 4, weak acid type cation exchanger 5, strong acid type cation exchanger 6, carbon remover 7 , Concentrated water reverse osmosis device 8, concentrated reverse osmosis device 9, evaporation crystallizer 10, sludge collection device 11 and sludge dehydration device 12 for treatment. The specific process is: the sewage first enters the lime softening and alkali removal clarification tank 1 , the effluent from the lime softening and alkali removal clarification tank 1 enters the filter tank 2 , and the excess sludge enters the sludge collection device 10 . The effluent from the filter 2 enters the ultrafiltration device 3, and the regularly backwashed wastewater from the filter 2 is disc...

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Abstract

The invention relates to a reverse osmosis membrane treatment process for recycling industrial sewage and realizing zero release. The reverse osmosis membrane treatment process is characterized by adopting a lime softening, alkaline-removing and clarifying tank, a filter tank, an ultrafiltration device and a primary reverse osmosis device as a first-stage concentrating and recycling system; adopting a weak acid type cation exchanger, a strong acid type cation exchanger, a carbon remover and a concentrated water reverse osmosis device as a second-stage concentrating and recycling system; adopting a concentrating reverse osmosis device as a third-stage concentrating and recycling system; adopting an evaporation crystallizer as a crystallizing and separating device for inorganic ions of the final concentrated liquid; and connecting the three systems in series to form the treatment process. The reverse osmosis membrane treatment process is especially suitable for reduction of industrial sewage and zero-release treatment projects of enterprises. The outlet water of the process system can be recycled as supplementing water for circulating and cooling water, a water source of boiler supplementing water and other purposes; the evaporation crystal substances can be used for a chemical raw material-brine; and other pollutants such as hard substances and suspended solids (SS) in the sewage are subjected to the solid-waste treatment in the form of dry sludge.

Description

technical field [0001] The invention relates to the fields of environmental protection sewage treatment and energy saving and emission reduction, in particular to a reverse osmosis membrane treatment process for industrial sewage reuse and zero discharge. Background technique [0002] Industrial enterprises need to use a lot of water in the production process. Usually surface water or groundwater is used as the water source, and through purification and chemical water treatment, process water of different qualities that meet the needs of production equipment is obtained. In the process of purification and chemical water treatment, a certain amount of wastewater will be produced while obtaining purified water, such as filter backwash drainage, reverse osmosis concentrated water, ion exchanger regeneration wastewater, etc. In the production process, some industrial equipment or process media need to be cooled, which requires circulating cooling water. During the circulation p...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/44
CPCC02F9/00C02F1/42C02F1/441C02F1/444C02F1/5236
Inventor 何立王建新
Owner 上海水合环境工程有限公司
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