Coupled crystallization method for high-concentration brine in textile thermal power industry

A high-concentration, industry-leading technology, applied in textile industry wastewater treatment, chemical instruments and methods, natural water treatment, etc., can solve problems such as water reuse and salt recovery needs, reduce pollution, reduce membrane pollution, and improve water production The effect of water quality

Inactive Publication Date: 2019-06-07
XINJIANG ENVIRONMENTAL ENG TECH
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Problems solved by technology

[0004] For this reason, the present invention provides a coupling crystallization method for high-concentration brine in the textile thermal power industry to overcome the problems of water reuse and salt recovery in the prior art

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  • Coupled crystallization method for high-concentration brine in textile thermal power industry

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[0034] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0035] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0036] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is only for convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a speci...

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Abstract

The invention relates to a coupled crystallization method for high-concentration brine in the textile thermal power industry. The method is characterized in that an activated carbon filter tank, a pHvalue adjusting tank, a primary nanofiltration system, a low pressure reverse osmosis system, a secondary nanofiltration system, freezing crystallization and an MVR are used, wherein the activated carbon filter tank is connected with the pH value adjusting tank, the pH value adjusting tank is connected with the primary nanofiltration system, and the primary nanofiltration system is connected withthe low pressure reverse osmosis system and the freezing crystallization separately; and the low pressure reverse osmosis system is connected with the secondary nanofiltration system, and the secondary nanofiltration system is connected with the MVR. Concentrated water of the low pressure reverse osmosis system is adopted as influent of the secondary nanofiltration system, separation and concentration of multi-valent salt and monovalent salt of the concentrated water are achieved through the characteristic that nanofiltration membranes have high rejection rate of the multi-valent salt and lowrejection rate of the monovalent salt; and NaCl and condensed water in water generated by the secondary nanofiltration can be further recovered through the MVR, and recovery of valuable resources is achieved.

Description

technical field [0001] The invention relates to the technical field of advanced treatment of industrial wastewater, in particular to a coupled crystallization method for high-concentration brine in the textile thermal power industry. Background technique [0002] In the past two years, the country has begun to pay attention to environmental protection. With the increasingly stringent environmental protection requirements and the serious shortage of water resources, the zero-discharge technology of wastewater has developed rapidly in the past two years, especially in arid areas that do not receive water bodies. Environmental protection does not allow wastewater discharge, making zero-discharge treatment technology an inevitable process route for industrial wastewater treatment. Zero discharge technology not only solves part of the water resource problem, but also does not cause pollution and damage to the local environment and ecology, which is one of the most important neces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/30C02F103/34
Inventor 郭超王刚杨泰山曾凡付艾山·玉素莆
Owner XINJIANG ENVIRONMENTAL ENG TECH
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