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A reactor for producing hydroxyl radicals with bipolar electrodes and its application

A bipolar electrode and free radical technology, applied in the field of reactors, can solve the problems of high operating cost, inability to achieve flocculation effect, inability to achieve continuous use, etc. Effect

Active Publication Date: 2021-07-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bipolar electrode used in the electrocoagulation water treatment device is a corrosive metal, which is easy to react with water and air in the water to form oxides such as rust, and the flocs and oxides produced need to be treated as hazardous waste for subsequent treatment; and the flocculation process requires In an alkaline environment, hydroxide colloid flocculant cannot be generated under acidic conditions, so that the flocculation effect cannot be achieved; the bipolar electrode of the device is a consumable during the reaction process and needs to be replaced continuously, which cannot be used continuously, and the operating cost is high

Method used

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  • A reactor for producing hydroxyl radicals with bipolar electrodes and its application
  • A reactor for producing hydroxyl radicals with bipolar electrodes and its application
  • A reactor for producing hydroxyl radicals with bipolar electrodes and its application

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Experimental program
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preparation example Construction

[0074] Preparation of catalytic raw materials:

[0075] (1) Preparation of liquid A: 15ml of tetrabutyl titanate was added to 45ml of absolute ethanol, and after magnetic stirring for 10min, 5g of pretreated graphite powder was added.

[0076] (2) Preparation of liquid B: add 45 ml of absolute ethanol to 6 ml of deionized water and 1.2 ml of nitric acid.

[0077] (3) Add solution B to solution A drop by drop at a rate of about 4ml / min until the reaction system becomes a gel system that cannot flow to obtain a gel.

[0078] (4) Put the gel in a blower dryer, and dry it at a constant temperature of 105° C. for 8 hours until all the organic solvents are volatilized to obtain a gray powder, which is ground into an ultrafine powder.

[0079] (5) The powder is placed in a muffle furnace and calcined at 500° C. for two hours to obtain the catalytic raw material.

[0080] Mix the prepared catalytic material with the adhesive at a ratio of 1mg: 1ml, then modify the surface of the bip...

Embodiment 1

[0082] like Figure 2 to Figure 5 As shown, a reactor for producing hydroxyl radicals with a bipolar electrode includes a power supply 1 and a reaction cell 9, the reaction cell 9 is provided with two drive electrodes 11, and the two drive electrodes 11 are arranged between There is a bipolar electrode 6, and the surface of the bipolar electrode 6 is provided with a catalytic material;

[0083] The reaction tank 9 is also provided with a water inlet 3, a water outlet 7 and an air inlet 8;

[0084] The two drive electrodes 11 are respectively connected to the positive and negative poles of the power supply 11 through wires 2 . The driving electrodes 11 are graphite plates. They are arranged in parallel in the inner wall of the reaction pool 9 . The graphite plate is chemically stable and will not be corroded by the current, avoiding the production of a large amount of iron mud and causing secondary pollution.

[0085] The reaction tank 9 is a hollow cuboid container made of...

Embodiment 2

[0088] A kind of bipolar electrode produces the reactor of hydroxyl radical, and structure is as described in embodiment 1, and difference is:

[0089] The reaction pool 9 is provided with a fixed plate installation groove 4, and a fixed plate 5 is arranged in the fixed plate installation groove 4, and the described fixed plate 5 is provided with a slit, and the bipolar electrode 6 is fixedly arranged on the fixed plate 5 through the slit of the fixed plate 5. between two driving electrodes 11;

[0090] The fixed plate 5 is a rectangular sheet, and the number of the fixed plates 5 is 2, and the two fixed plates 5 are arranged in parallel; the slits on the fixed plates 5 are also arranged in parallel. The purpose of this design is to insert the fixing plate 5 into the fixing plate installation groove 4 of the reaction cell 9 to fix the bipolar electrode 6 . The stability of the bipolar electrode 6 in the reaction system is guaranteed.

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Abstract

The invention relates to a reactor for generating hydroxyl radicals with a bipolar electrode and its application, including a power supply and a reaction pool, the reaction pool is provided with two driving electrodes, and a bipolar electrode is arranged between the two driving electrodes , the surface of the bipolar electrode is provided with a catalytic material; the reaction pool is also provided with a water inlet, a water outlet and an air inlet; the two driving electrodes are respectively connected to the positive and negative electrodes of the power supply through wires. The invention also provides the application of using the reactor to degrade methylene blue in waste water. In the present invention, the bipolar electrode is not directly connected with the power supply, but it can degrade pollutants, which has the remarkable advantage of energy saving, and provides a direction for future water treatment; and the device is simple in structure, easy to use, and has good experimental use effect .

Description

technical field [0001] The invention relates to a reactor for generating hydroxyl radicals (·OH) by a bipolar electrode and an application thereof, belonging to the technical field of water treatment. Background technique [0002] In the 1860s, Fleischmann created the concept of fluidized bed electrode, which is the earliest prototype of bipolar electrode (bipolar electrode, referred to as BPE). For decades, due to the constraints of technical conditions and the limitations of reference materials, the development of bipolar electrochemistry is slow, and its research is basically limited to the fields of electrolysis and batteries. In recent years, with the development of science and technology and the gradual maturity of technology, bipolar electrochemistry has won the favor of researchers for its advantages of low cost, simple device, easy operation, and no regional control. At present, the pollution of domestic water resources is increasing day by day, and there are more ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/36C02F101/38
CPCC02F1/4672C02F1/66C02F1/72C02F7/00C02F9/00C02F2101/36C02F2101/38C02F2101/40C02F2305/023
Inventor 高明明孙智勇苗菲王新华赵珊
Owner SHANDONG UNIV