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Electrodialysis device and method for preventing scaling of electrode water system by adopting directional driving technology

An electrodialysis and ultra-water technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problem of easy scaling of the cathode plate, reduce the scaling of the cathode plate, reduce the tendency of scaling, The effect of improving migration efficiency

Pending Publication Date: 2020-11-20
ZHEJIANG ZHENENG TECHN RES INST
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AI Technical Summary

Problems solved by technology

[0007] The invention aims at the problem that the cathode plate in the existing electrodialysis technology is easy to scale during the power transmission process, and provides an electrodialysis device and method that adopts the directional drive technology to prevent the fouling of the pole water system

Method used

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  • Electrodialysis device and method for preventing scaling of electrode water system by adopting directional driving technology
  • Electrodialysis device and method for preventing scaling of electrode water system by adopting directional driving technology
  • Electrodialysis device and method for preventing scaling of electrode water system by adopting directional driving technology

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Embodiment

[0034] A coal-fired power plant adopts the electrodialysis device which adopts the directional drive technology of the present invention to prevent fouling of the polar water system to treat desulfurization wastewater. The concentration of root ion and chloride ion is higher. See the table below for specific water quality conditions.

[0035] Table 1 Water quality of desulfurization wastewater

[0036]

[0037] The configured system has a rated processing flow rate of 10 tons / hour and is composed of electrodialysis reactor, concentrated water tank, fresh water tank, pole water tank, circulation pump, filter, cooling system and corresponding pipelines and valves. Concentrated water, fresh water, and polar water pass through different channels of the membrane stack to form three internal cycles. The outlet of the concentrated water pump of the system is connected to the bypass flue gas drying tower, and the concentrated and reduced desulfurization wastewater concentrated wate...

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Abstract

The invention relates to an electrodialysis device for preventing scaling of an electrode water system by adopting a directional driving technology. The electrodialysis device comprises an electrodialysis reactor, a fresh water tank, a concentrated water tank and an electrode water tank; the electrodialysis reactor is formed by assembling an anode plate, a membrane stack and a cathode plate in sequence; wherein the arrangement mode of the membrane stack is (C-A2)n-C1 in sequence, n is a natural number of 1-2000, n fresh water channels, n concentrated water channels and two polar water channelsare formed, and the fresh water channels and the concentrated water channels are arranged at intervals; C1 refers to a monovalent selective cation exchange membrane, C refers to a common selective cation exchange membrane, and A2 refers to a common selective anion exchange membrane; and the concentrated water tank, the concentrated water pump, the concentrated water filter and the membrane stackconcentrated water channel are sequentially connected to form a concentrated water circulation path. The electrodialysis reactor has the beneficial effects that the concentration of divalent cations (mainly calcium ions and magnesium ions) in the polar water can be greatly reduced by utilizing the electrodialysis reactor to treat the salt-containing wastewater, so that the scaling tendency of a cathode plate is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection water treatment, and in particular relates to an electrodialysis device and method for preventing fouling of an extreme water system by adopting a directional drive technology. Background technique [0002] With the rapid development of contemporary society and economy, the level of industrial production has increased rapidly, and the problem of water pollution has become increasingly serious. In recent years, with the promulgation and implementation of "Energy Conservation Law", "Environmental Protection Law" and other laws and regulations, the state has increasingly stringent requirements on the water consumption, drainage and drainage water quality of enterprises, making it possible to reduce wastewater discharge and realize wastewater resource utilization. become an important topic in the field of water treatment. [0003] Electrodialysis is a method that uses the selective p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/20C02F101/10
CPCC02F1/4693C02F1/4602C02F1/001C02F2101/10C02F2303/22C02F2101/20C02F2101/101
Inventor 冯向东秦刚华童小忠徐浩然张贺陈彪高强生雷石宜
Owner ZHEJIANG ZHENENG TECHN RES INST
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