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Electrochemical system for purifying drinking water and purification method

An electrochemical and drinking water technology, applied in the electrochemical system and purification field of drinking water, can solve the problems of decreased electrochemical activity, low utilization efficiency, heavy metal pollution, etc. The effect of promoting oxidation

Pending Publication Date: 2018-04-20
傲自然成都生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the serious pollution of disinfection by-products and heavy metals in domestic drinking water, and the low utilization efficiency and short lifespan of active metal materials as described in the background technology in the purification process of drinking water, which is prone to secondary pollution and rapid decline in electrochemical activity. and other problems, the present invention provides an electrochemical system and purification method for purifying drinking water that can efficiently and quickly remove disinfection by-products and heavy metals, while having a high utilization rate of metal materials and high electrolysis efficiency

Method used

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  • Electrochemical system for purifying drinking water and purification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1: Construction of an electrochemical system for drinking water purification

[0069] A 5mm thick polypropylene (PP) plate is used as the shell of the electrochemical system (length 240mm, width 140mm, height 250mm), in which the anode chamber 2 is 80mm long, 130mm wide, and 250mm high, with an effective volume of 2.6L, and the cathode chamber 4 is 140mm long and 130mm wide. The height is 250mm, and the effective volume is 4.5L. The partition wall between the anode chamber 2 and the cathode chamber 4 is provided with a diaphragm, the diaphragm adopts a proton exchange membrane (Nafion 117, 140mm, width 80mm), and the lower end of the diaphragm is 20mm from the bottom of the shell. A water-permeable membrane 12 and a gas-permeable membrane 13 are arranged on the upper part of the partition, wherein the water-permeable membrane 12 is fixed in the plastic card slot by laser microporous concave rubber, and the gas-permeable membrane is made of polytetrafluoroethylen...

Embodiment 2

[0070] Example 2: Operation of the electrochemical system and purification of drinking water

[0071] Using the electrochemical system constructed in Example 1, prepare 2.5 L of electrolyte solution (2% NaCl), inject it into the anode chamber, and seal the anode chamber. Use a three-way pipe to connect the electrochemical system to the drinking water pipeline, open the clean water outlet valve of the electrochemical system, the water flow switch detects the water flow and activates the external power supply through the automatic controller. During the operation, the static flow rate and continuous flow were tested. Under the conditions, the change of the cathode potential under different applied voltages.

[0072] The results show that the cathode potential of the electrochemical system can be maintained at -1.4V (VS Ag / AgCl) at a static flow rate with an external voltage of 0.5V. Under continuous flow, the cathode potential can be maintained between -1.0V - -1.5V (VS Ag / AgCl...

Embodiment 3

[0075] Embodiment 3: long-term operation of electrochemical system and its backwashing operation

[0076]The electrochemical system of Example 1 was used, connected to the drinking water pipeline for long-term operation, and the cathode potential change of the electrochemical system under different flow rates and different applied voltages, as well as the consumption of anolyte and anode loss under long-term operation were observed. The results show that the cathode potential can be maintained in the range of -1.0V - -1.5V (VS Ag / AgCl) by adjusting different applied voltages at different flow rates, especially under intermittent operation, the automatic controller can be controlled by the cathode potential The control interval completes the opening and closing of the external power supply. During operation, it was found that magnesium anodic oxidation not only generates electrons to reduce heavy metals through the cathode and produce hydrogen, but also self-oxidation and hydro...

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Abstract

The invention relates to an electrochemical system for purifying drinking water and a purification method. The system comprises an anode (1), an anode chamber (2), a cathode (3), a cathode chamber (4), a diaphragm (5), an additional power supply I (6), an additional power supply II (7), an automatic controller (8), a backflush valve (9) of the cathode chamber, a flushing valve (10) of the anode chamber, an exhaust valve (11) of the anode chamber, a water permeable membrane (12), a gas permeable membrane (13), a liquidometer (14), a reference electrode (15), a seal cover (16) of the anode chamber, a water flow switch (17) and a safety valve (18). The system and method provided by the invention can remove disinfecting byproducts and metals efficiently and quickly, and meanwhile, the metal material is high in utilization ratio and high in electrolytic efficiency.

Description

technical field [0001] The invention relates to the field of water purification, in particular to the field of drinking water purification, in particular to an electrochemical system and a purification method for purifying drinking water. Background technique [0002] As far as the daily drinking water of residents is concerned, the raw water is generally transported to users through the pipe network after the raw water is treated by the waterworks through sedimentation, filtration, and disinfection. Among them, chlorine gas disinfection is the main means to inhibit harmful microorganisms such as coliform bacteria. In recent years, with the development of industrialization and urbanization, a large amount of inorganic pollutants such as organic pollutants and heavy metals have entered rivers, lakes and groundwater systems, and many cities and towns have suffered serious pollution of drinking water sources. Due to the limited removal efficiency of the existing tap water treat...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F1/461C02F101/20
CPCC02F1/46104C02F1/4618C02F1/467C02F1/4678C02F2001/4619C02F2001/46195C02F2101/20C02F2201/46115C02F2303/18
Inventor 李冬顺艺
Owner 傲自然成都生物科技有限公司