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Electrochemical reactor, method for removing chlorine ions in waste water through electric flocculation, precipitation product and application

A reactor and electrochemical technology, applied in the field of environmental pollution control, can solve the problems of easy passivation and deactivation of electrodes, easy adsorption and saturation of adsorbents, long adsorption time, complicated electrolysis devices, etc., and achieves simple device and mild reaction conditions. , controllable effect

Active Publication Date: 2017-10-27
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to solve the problems in the prior art that the adsorbent is easy to absorb and saturate, the adsorption time is long, the electrode is easily passivated and deactivated, and the electrolysis device is complicated.

Method used

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  • Electrochemical reactor, method for removing chlorine ions in waste water through electric flocculation, precipitation product and application

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Effect test

Embodiment 1

[0039] The wastewater to be treated with a chloride ion concentration of 2087mg / L is introduced into the reaction tank of the electrochemical reactor, the anode and the cathode are immersed in the wastewater, a constant current is applied between the cathode and the anode, and the wastewater is continuously stirred. The power used is a direct current power supply, the voltage is 3 volts, the current is 2 amps, the reaction temperature is 20° C., and the reaction pH is 6.8. After 2 hours of electrification, the chloride ion concentration dropped from 2087mg / L to 350.38mg / L, and the pH increased from 6.8 to 11.

Embodiment 2

[0041] The wastewater to be treated that the chlorine ion concentration is 1200mg / L and the calcium ion concentration is 600mg / L is introduced in the reaction tank of the electrochemical reactor, the anode and the cathode are immersed in the wastewater, a constant current is applied between the cathode and the anode, and Continuously stir the waste water, the power used in the reaction process is a DC power supply, the voltage is 3 volts, the current is 2 amps, the reaction temperature is 25° C., and the reaction pH is 6.6. After 1 hour of electrification, the chloride ion concentration dropped from 1200mg / L to 100mg / L, the calcium ion concentration was 230mg / L, and the pH increased from 6.6 to 10.

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Abstract

The invention discloses an electrochemical reactor, a method for removing chlorine ions in waste water through electric flocculation, a precipitation product and an application. The electrochemical reactor comprises one or more reaction tanks, wherein an anode and a cathode in the reaction tank alternately arranged; the anode is a copper electrode; and the cathode is an inert electrode. The method comprises the steps of introducing to-be-treated waste water into the reaction tanks of the electrochemical reactor and immersing the anode and the cathode into the waste water; applying constant current between the anode and the cathode and lastingly stirring the waste water. According to the invention, an agent does not need to be additionally added, the possibility of secondary pollution is very low, the reaction conditions are mild and limitation of the concentration range of the chlorine ions is avoided. Meanwhile, the device used for reaction is simple, relatively low in cost and beneficial to automation.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, and more specifically relates to an electrochemical reactor and a method for removing chlorine ions in wastewater by electrocoagulation. Background technique [0002] Wastewater containing high chloride ions is often produced in industrial production and living processes. When the concentration of chloride in water reaches 800-1000 mg / L, people will feel that the water has a salty, bitter taste when drinking. When the concentration of chloride ions in irrigation water reaches 142-355 mg / L, it will endanger the growth of crops, and when the concentration of chloride ions is greater than 355 mg / L, it will cause extremely serious harm to agriculture. [0003] Chloride ions not only have a great corrosive effect on pipeline equipment during the production process, but also cause serious threats to the environment and human health when discharged into water without treatment. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/00C02F1/461C02F1/463C02F1/465C02F1/467
CPCC02F1/46104C02F1/46109C02F1/463C02F1/465C02F1/467C02F5/00C02F2303/08
Inventor 王又容程四清杜传青郑立辉
Owner WUHAN POLYTECHNIC UNIVERSITY
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