Drinking water pre-oxidation method based on hydrogen peroxide electroproduction apparatus

A technology of hydrogen peroxide and pre-oxidation, applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as carcinogenic disinfection by-products, and achieve the effect of effective pre-oxidation

Inactive Publication Date: 2018-05-25
HARBIN HAOWEI WEIYE TECH DEV CO LTD
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AI Technical Summary

Problems solved by technology

The present invention aims at the problem that the pre-chlorination technology commonly used in existing waterworks will produce carcinogenic disinfection by-products, and proposes a green, effective and economical new pre-oxidation method

Method used

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Embodiment Construction

[0011] The drinking water pre-oxidation method based on the electrogenerated hydrogen peroxide device of the present invention comprises the following steps:

[0012] The first step is to design an electrochemical device suitable for electrogenerating hydrogen peroxide. This device has no diaphragm, makes full use of the oxygen precipitated from the anode, and prolongs the residence time of the oxygen exposed from the bottom of the electrolytic cell on the cathode to improve the utilization efficiency of oxygen;

[0013] In the second step, graphite felt is used as the cathode material for electrogenerated hydrogen peroxide. In a new electrolysis device with graphite felt as the cathode and titanium, ruthenium and iridium electrodes as the anode, without adding any chemical substances or adding a diaphragm, directly use the Raw water is the electrolyte, when the current density is 2mA·cm -2 , ventilation volume 0.4m 3 h -1 , flow rate 100mL·min -1 , the online concentration...

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Abstract

The invention discloses a drinking water pre-oxidation method based on a hydrogen peroxide electroproduction apparatus. The method comprises the following steps: 1) an electrochemical device is designed for hydrogen peroxide electroproduction; 2) graphite felt is taken as a cathode material for hydrogen peroxide electroproduction, in a novel electrolytic apparatus by taking the graphite felt as anegative pole and iridium electrode as a positive pole, without addition of a chemical substance and addition of a diaphragm, raw water is directly taken as an electrolyte; 3) iron silicon powder self-made in a laboratory is used as a heterogeneous catalyst for a Fenton-like reaction to enhance the pre-oxidation capability of the method; and 4) an electrochemical pre-oxidation method has good removal effect for bacteria and odor smell in the raw water. The drinking water pre-oxidation method is characterized in that the raw water flows through the diaphragm-free electrochemical apparatus without any chemical reagent, and under dual effects of electrochemical direct disinfection and indirect oxidation with hydrogen peroxide, effective pre-oxidation on the raw water is realized.

Description

technical field [0001] The invention relates to a drinking water pre-oxidation method, in particular to a drinking water pre-oxidation method based on an electrogenerated hydrogen peroxide device, and belongs to the technical field of water purification. Background technique [0002] Water is the source of life and indispensable for human survival and development. About 1.4 billion people in the world lack reliable and safe drinking water, and millions of people die every year from various diseases caused by drinking water pollution. Safe drinking water is very important to human life. The disinfection and purification of drinking water should be highly valued. In order to reduce bacteria and algae and other microorganisms in water, and reduce the process of organic matter content in drinking water disinfection, among many drinking water disinfection methods, chlorine Disinfection is still an important treatment method for urban water supply in China at present. Chlorination...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/4672C02F2303/04C02F2305/026
Inventor 于海涛
Owner HARBIN HAOWEI WEIYE TECH DEV CO LTD
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