Filter type electrochemical reactor, water treatment device and water treatment method

Abstract

The invention discloses a filter type electrochemical reactor, a water treatment device and a water treatment method. The filter type electrochemical reactor comprises a water distribution pipe, a plurality of layers of tubular porous electrodes and a tubular reactor wall which are sequentially embedded from the inside to the outside; openings of two ends of each tubular porous electrode and the tubular reactor wall are sealed by adopting a sealing structure, the water distribution pipe passes through the sealing structure, the water distribution pipe is provided with a water inlet, and a cavity body composed of one tubular porous electrode located at an outermost layer and the tubular reactor wall is provided with a water outlet; the water distribution pipe and the tubular reactor wall are separately prepared from a conductive material, and the water distribution pipe and the tubular reactor wall are set as a cathode; the plurality of layers of tubular porous electrodes are separatelyand alternately set as one anode and one cathode from the inside to the outside; and porosity of the tubular porous electrodes is greater than or equal to 45%. According to the electrochemical reactor, device and method disclosed by the invention, after organic wastewater passes through the tubular porous electrodes, the purpose of filtration, electrochemical oxidation and degradation of pollutants is realized in one step, the sewage purification time is short, and the efficiency is high; and moreover, the porous electrodes can improve turbulence of a water flow and improve efficiency of an electrochemical oxidation reaction, so that the filter type electrochemical reactor disclosed by the invention has the characteristics of high electrochemical oxidation efficiency and low energy consumption.

Description

technical field

[0001] The invention relates to the technical field of sewage treatment, more specifically, to a filter type electrochemical reactor, a water treatment device and a water treatment method. Background technique

[0002] With the rapid development of my country's economy, the types and quantities of organic pollutants entering the water environment are increasing, and the problem of water environment pollution caused by organic waste is becoming more and more serious. For example, halogenated organic compounds (such as chloroform, perfluorinated compounds, etc.) are often used as solvents and surfactants in human production and life, and have been continuously detected in various environmental media in recent years. Most halogenated organic compounds are highly persistent, refractory and highly toxic in the environment. Studies have shown that long-term exposure to low doses of halogenated organic compounds can also cause long-term damage to aquatic organisms. ...

Examples

Embodiment 1

[0063] A filtered electrochemical reactor, such as figure 1 As shown, it includes a tubular reactor wall 1, a three-layer tubular porous electrode 2 sleeved inside the tubular reactor wall 1, a water distribution pipe 3 sleeved inside the tubular porous electrode 2, and the three-layer tubular porous electrode 2 forms a sleeve structure. From inside to outside, there are first tubular porous electrode 2, second tubular porous electrode 2, and third tubular porous electrode 2. The water distribution pipe 3 is set inside the first tubular porous electrode 2; Openings at both ends are packaged with plexiglass flanges 4 through bolts; the filter electrochemical reactor of this embodiment is provided with a water outlet 5, a cavity formed by the third tubular porous electrode 2, tubular reactor wall 1 and plexiglass flange 4 The body communicates with the water outlet 5;

[0064] The tubular reactor wall 1 is made of stainless steel;

[0065] A part of the water distribution pipe...

Embodiment 2

[0070] An electrochemical water treatment device, such as figure 2 Shown, comprise filter type electrochemical reactor 7 and DC power supply 8 of embodiment 1, also comprise water inlet tank 12, booster pump 11, flow meter 10, water inlet pressure gauge 9 and water outlet pressure gauge 13, water inlet tank 12, The booster pump 11, the flowmeter 10, the water inlet pressure gauge 9, and the water inlet of the filter electrochemical reactor 7 are connected through pipelines in turn, and the water outlet 5 of the filter electrochemical reactor 7, the water outlet pressure gauge 13, and the water inlet tank 12 connected by pipes in turn.

Embodiment 3

[0072] An electrochemical water treatment method, using the electrochemical water treatment device of embodiment 2 to treat printing and dyeing wastewater containing rhodamine B.

[0073] S1. Connect the negative pole of the DC power supply 8 to the cathode terminal, and the positive pole of the DC power supply 8 to the anode terminal;

[0074] S2. 2 L of printing and dyeing wastewater containing rhodamine B with an initial concentration of 200 mg / L is placed in the water inlet tank 12, and Na is added in the water inlet tank 12. 2 SO 4 The supporting electrolyte was made to have a concentration of 50 mM, the power was turned on, and the constant current mode was used to adjust the current density to 20 mA / cm 2 ;

[0075] S3. Turn on the booster pump 11, adjust the pressure difference between the inlet water and the outlet water of the filter electrochemical reactor 7 to be 1.0 MPa, and the printing and dyeing wastewater enters the filter electrochemical reactor 7 through th...

technical field

[0001] The invention relates to the technical field of sewage treatment, more specifically, to a filter type electrochemical reactor, a water treatment device and a water treatment method. Background technique

[0002] With the rapid development of my country's economy, the types and quantities of organic pollutants entering the water environment are increasing, and the problem of water environment pollution caused by organic waste is becoming more and more serious. For example, halogenated organic compounds (such as chloroform, perfluorinated compounds, etc.) are often used as solvents and surfactants in human production and life, and have been continuously detected in various environmental media in recent years. Most halogenated organic compounds are highly persistent, refractory and highly toxic in the environment. Studies have shown that long-term exposure to low doses of halogenated organic compounds can also cause long-term damage to aquatic organisms. ...

Examples

Embodiment 1

[0063] A filtered electrochemical reactor, such as figure 1 As shown, it includes a tubular reactor wall 1, a three-layer tubular porous electrode 2 sleeved inside the tubular reactor wall 1, a water distribution pipe 3 sleeved inside the tubular porous electrode 2, and the three-layer tubular porous electrode 2 forms a sleeve structure. From inside to outside, there are first tubular porous electrode 2, second tubular porous electrode 2, and third tubular porous electrode 2. The water distribution pipe 3 is set inside the first tubular porous electrode 2; Openings at both ends are packaged with plexiglass flanges 4 through bolts; the filter electrochemical reactor of this embodiment is provided with a water outlet 5, a cavity formed by the third tubular porous electrode 2, tubular reactor wall 1 and plexiglass flange 4 The body communicates with the water outlet 5;

[0064] The tubular reactor wall 1 is made of stainless steel;

[0065] A part of the water distribution pipe...

Embodiment 2

[0070] An electrochemical water treatment device, such as figure 2 Shown, comprise filter type electrochemical reactor 7 and DC power supply 8 of embodiment 1, also comprise water inlet tank 12, booster pump 11, flow meter 10, water inlet pressure gauge 9 and water outlet pressure gauge 13, water inlet tank 12, The booster pump 11, the flowmeter 10, the water inlet pressure gauge 9, and the water inlet of the filter electrochemical reactor 7 are connected through pipelines in turn, and the water outlet 5 of the filter electrochemical reactor 7, the water outlet pressure gauge 13, and the water inlet tank 12 connected by pipes in turn.

Embodiment 3

[0072] An electrochemical water treatment method, using the electrochemical water treatment device of embodiment 2 to treat printing and dyeing wastewater containing rhodamine B.

[0073] S1. Connect the negative pole of the DC power supply 8 to the cathode terminal, and the positive pole of the DC power supply 8 to the anode terminal;

[0074] S2. 2 L of printing and dyeing wastewater containing rhodamine B with an initial concentration of 200 mg / L is placed in the water inlet tank 12, and Na is added in the water inlet tank 12. 2 SO 4 The supporting electrolyte was made to have a concentration of 50 mM, the power was turned on, and the constant current mode was used to adjust the current density to 20 mA / cm 2 ;

[0075] S3. Turn on the booster pump 11, adjust the pressure difference between the inlet water and the outlet water of the filter electrochemical reactor 7 to be 1.0 MPa, and the printing and dyeing wastewater enters the filter electrochemical reactor 7 through th...

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