Compound bed regenerated wastewater resource recycling system

A recycling wastewater recycling technology, applied in the field of resource recycling technology and systems, can solve the problems of difficult discharge, reduction of recycled wastewater discharge, and difficult treatment of recycled wastewater, so as to save energy, take into account environmental protection benefits and economic benefits , the effect of reducing energy consumption

Inactive Publication Date: 2020-12-15
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the current situation that the existing anion resin regeneration wastewater is difficult to treat and discharge, the present invention provides a resource recycling process system for anion resin regener

Method used

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  • Compound bed regenerated wastewater resource recycling system

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Embodiment 1

[0027] The resource recycling system of the multiple-bed regeneration wastewater includes a separation and treatment method for the regeneration wastewater. The resource recycling system of the double-bed regeneration wastewater includes membrane separation and bipolar membrane system. The separable membrane concentration and bipolar membrane system are arranged sequentially; the membrane separation and concentration system is used for separable membrane migration and concentration of resin regeneration wastewater, and the bipolar membrane system is used to treat the concentrate and obtain acid And alkali is reused in this system, and the hard salt water such as calcium and magnesium is concentrated by nanofiltration membrane, and then a small amount of concentrated salt water is sprayed with coal slag for treatment.

[0028] The membrane separation and concentration system includes a nanofiltration treatment system and a reverse osmosis system; the nanofiltration treatment sy...

Embodiment 2

[0034] A reclaimed wastewater recycling system with multiple beds, comprising a membrane separation and concentration system and a bipolar membrane system, characterized in that the membrane separation and concentration system and the bipolar membrane system are arranged in sequence; the membrane separation and concentration system It is used to separate and concentrate the anion resin regeneration wastewater, and the bipolar membrane system is used to process the concentrated solution of the membrane separation and concentration system through the bipolar membrane to obtain acid and alkali for reuse in the multiple bed replacement regeneration system; The mixed solution of regenerated acid wastewater from the cation resin ion exchange bed 101 and the mixed cation resin bed 104 enters the separable electrodialysis system 201 for dehardening treatment; the feed liquid treated by the separable electrodialysis system 201 is divided into two paths, respectively Hard concentrated wa...

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Abstract

The invention relates to a resource recycling process and a resource recycling system for compound bed regenerated wastewater. The resource recycling system for the compound bed regenerated wastewateris used for treating regenerated wastewater generated by ion exchange regeneration. According to the invention, a membrane separation and concentration system and a bipolar membrane system are sequentially arranged; the membrane separation and concentration system is used for carrying out quality-divided recycling on the composite bed ion exchange resin regeneration wastewater, and the bipolar membrane system is used for treating a concentrated solution of the membrane separation and concentration system to obtain acid and alkali which are recycled for the system. The system has the advantages that sulfate radicals are efficiently concentrated with low energy consumption, the salt concentration of acid and alkali prepared by a bipolar membrane is guaranteed, the rest monovalent brine suchas sodium chloride, sodium nitrate and the like is concentrated by a reverse osmosis system and sent to the bipolar membrane to prepare acid and alkali, and mixed acid can be prepared or sulfuric acid and hydrochloric acid can be respectively prepared according to the difference of inlet water quality; reasonable arrangement is realized according to the treatment characteristics of respective membranes; and the energy consumption of the whole system is greatly reduced while efficient concentration is realized.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a resource recovery process and system for multiple-bed regeneration wastewater. Background technique [0002] Ion exchange resins are widely used in power plants, water treatment, high-purity water production and other fields. Ion exchange resin has many advantages such as good adsorption selectivity, high mechanical strength, strong anti-pollution ability, good physical and chemical stability, and recyclable use. It is easy to operate and low in investment. However, when the ion exchange resin fails, it needs to be regenerated, and a large amount of wastewater containing ion exchange regenerants will be generated. The high total salt content of ion exchange regeneration wastewater and the unstable discharge pH value not only cause waste of water resources, but also have a bad impact on the environment. [0003] In recent years, with the promulgation and implemen...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/441C02F1/442C02F1/4693C02F1/4602C02F9/00C02F5/00C02F2303/22
Inventor 褚红俞游白海浪徐悠杨勇杜圣羽
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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