Electrocatalytic Microchannel Organic Wastewater Treatment Device

Abstract

The present invention relates to an electrocatalytic microchannel device for treating organic wastewater, which comprises a housing, multiple layers of electrodes and multiple hoses. The lower end of the housing is provided with a water inlet, and the upper end is provided with a water outlet. The multiple layers of electrodes are arranged at intervals in the horizontal direction in the housing and are located between the water inlet and the water outlet. Multiple hoses are closely arranged between adjacent electrodes. The outer surface of the hose is provided with spiral protrusions, the lower end is sealed, and the upper end extends upward beyond the electrode. In the present invention, the inflatable hose forms a microchannel, and blockage can be conveniently removed.

Description

Technical Field

[0001] The present invention relates to the field of wastewater treatment, and particularly to an electrocatalytic microchannel organic wastewater treatment device. Background Art

[0002] Electrochemical water treatment technology is a green water treatment technology. Its main principle is to regulate the electron flow using the potential difference, enabling pollutants to complete the degradation or transformation process at the electrode interface or in the solution to achieve water quality purification. Electrochemical water treatment technology has unique advantages compared with traditional water treatment technologies: (1) Clean: The reactant is electrons, without the addition of chemical agents and no secondary pollution. (2) Flexible: The shape and size of the electrodes can be precisely controlled; the types of reactors are flexible and changeable, with no rigid requirements for the water treatment site; it can be used alone or in combination with other technologies. (3) Simple: The required equipment is simple, the operation is simple (by controlling the current or voltage), the conditions are simple (it can be processed under normal temperature and pressure), and the post-treatment is simple. (4) Controllable: Without harsh reaction conditions, the manpower requirement is very low, which is convenient for automatic control. At the same time, electrocatalytic oxidation technology also has its disadvantages, that is, the power consumption is high, and the electricity cost is the main operating expense.

[0003] In recent years, the combination of microchannel continuous flow technology has attracted the attention of relevant researchers. The combination of electrolysis and microchannel continuous flow technology can greatly shorten the reaction time and electron transfer efficiency, and has advantages that cannot be compared with the traditional flask (reaction kettle) reaction in many aspects.

[0004] The design of the microchannel continuous flow reactor produced by the combination of electrocatalytic reaction and microchannel continuous flow technology is the key to its application. In homogeneous organic synthesis, the design of this equipment is simple. However, in the field of wastewater treatment, the micron-scale channel size and complex internal structure of the microchannel reactor make the reactor channels extremely easy to block, and at the same time, it is very difficult to clean. This shortcoming has become the biggest problem in the application of microchannel reactors in the field of water treatment. Because, the wastewater in the wastewater treatment process will more or less contain particulate matter, and these particulate matters can easily cause the reactor to be blocked and lose its treatment function. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an electrocatalytic microchannel organic wastewater treatment device, which can conveniently remove blockages with the microchannels composed of inflatable hoses.

[0006] To solve the above technical problems, the technical solution of the present invention is: an electrocatalytic microchannel organic wastewater treatment device, comprising:

[0007] A housing, having a water inlet at the lower end and a water outlet at the upper end;

[0008] The multi-layer electrodes are arranged at intervals in the horizontal direction inside the housing and are located between the water inlet and the water outlet;

[0009] Multiple hoses, multiple of these hoses are closely arranged between adjacent electrodes. The outer surface of the hose is provided with spiral protrusions, the lower end is sealed, and the upper end extends upward beyond the electrode.

[0010] Furthermore, in order to improve the oxidation efficiency and make the microchannel narrower, air holes for gas passage are provided on the tube walls of at least some of the hoses.

[0011] Furthermore, multiple hoses between adjacent electrodes are closely arranged in a layer. Among any two adjacent hoses, only one hose is provided with the air holes.

[0012] Furthermore, in order to facilitate the inflation and air extraction operations of multiple hoses, the electrocatalytic microchannel organic wastewater treatment device further includes a sieve plate. The top of the housing is provided with a ventilation port, and the sieve plate is installed inside the housing and is located below the ventilation port; wherein,

[0013] All hoses converge to the sieve plate, and the upper end opening of each hose is closely attached and connected to a sieve hole of the sieve plate.

[0014] Furthermore, the electrodes are in a closed-loop shape, and multiple electrodes are arranged at intervals from the inside to the outside in the horizontal direction.

[0015] Furthermore, the electrodes are cylindrical.

[0016] Furthermore, the cavity of the innermost electrode is blocked to prevent wastewater from passing through.

[0017] Furthermore, sealing covers are respectively arranged at the upper and lower ends of the innermost electrode.

[0018] Furthermore, the material of the electrode is titanium or stainless steel.

[0019] After adopting the above technical solutions, the present invention has the following beneficial effects:

[0020] 1. The microchannel composed of inflatable hoses can be conveniently cleared of blockages and the equipment can be maintained, which is suitable for the environmental protection water treatment industry;

[0021] 2. The combination of electrocatalysis and microchannel technology can give full play to the advantages of the microchannel, shorten the electron transfer path, reduce the voltage, and reduce power consumption;

[0022] 3. The microchannel has a simple structure and is easy to prepare. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the electrocatalytic microchannel organic wastewater treatment device of the present invention;

[0024] Figure 2 This is a cross-sectional view of the electrocatalytic microchannel organic wastewater treatment device of the present invention;

[0025] In the figure, 1 is the housing; 11 is the water inlet; 12 is the water outlet; 13 is the ventilation port; 2 is the electrode; 3 is the hose; 4 is the sieve plate; 5 is the sealing cover. Detailed implementation manners

[0026] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments in conjunction with the accompanying drawings.

[0027] As Figure 1 、 2 shown, an electrocatalytic microchannel organic wastewater treatment device includes:

[0028] A housing 1, with a water inlet 11 provided at the lower end and a water outlet 12 provided at the upper end;

[0029] Multiple layers of electrodes 2, arranged at intervals in the horizontal direction within the housing 1 and located between the water inlet 11 and the water outlet 12;

[0030] Multiple hoses 3, with multiple hoses 3 closely arranged between adjacent electrodes 2. The outer surface of the hose 3 is provided with spiral protrusions, sealed at the lower end, and extending upward beyond the electrode 2 at the upper end. The diameter of the hose 3 is 5 - 15 mm.

[0031] Specifically, due to the existence of the spiral protrusions, gaps are left between the electrode 2 and the hose 3 and between adjacent hoses 3 to serve as microchannels. During operation, the wastewater to be treated flows in from the lower water inlet 11, and air is blown into the hose 3 from the upper opening of the hose 3 through a blower or an air compressor, causing the hose 3 to expand moderately, making the microchannels narrower. After the water flows through the microchannels, it is discharged from the upper water outlet 11. If a blockage occurs, as long as the air injection into the hose 5 is stopped or the air in the hose 3 is discharged, the microchannels can be made larger. After removing the blocked particles, the device can continue to work. The process of removing the blockage is very simple. Even by the method of inhaling air, the blocked channels can be made larger, and the particulate matter is more easily removed. This embodiment can conveniently remove blockages and maintain the equipment, and is applicable to the environmental protection water treatment industry.

[0032] In one embodiment, at least part of the tube wall of the hose 3 is provided with air holes for gas passage. Preferably, multiple hoses 3 between adjacent electrodes 2 are closely arranged in a layer, and among any two adjacent hoses 3, only one hose 3 is provided with air holes.

[0033] After such a setting, a part of the air entering the hose 3 forms bubbles through the pores of the hose 5 and is discharged between the electrodes 2. Water flows upward from below through the gap between the electrodes 2 and the hose 3. With the injection of air, on the one hand, the oxygen in the air participates in the oxidation reaction, improving the oxidation efficiency. On the other hand, it compresses the cross-sectional area of the microchannel, making the microchannel narrower. A thin liquid film is formed between the electrodes 2, and oxygen is more easily dissolved into the liquid film, and organic matter is more easily oxidized.

[0034] In one embodiment, as Figure 1 shown, the electrocatalytic microchannel organic wastewater treatment device further includes a sieve plate 4. The top of the housing 1 is provided with a ventilation port 13. The sieve plate 4 is installed in the housing 1 and is located below the ventilation port 13; wherein,

[0035] All the hoses 3 converge to the sieve plate 4, and the upper end opening of each hose 3 is tightly connected to a sieve hole of the sieve plate 4.

[0036] With such a setting, it is very convenient to inject air into the hose 3 and also convenient to perform the air extraction operation on the hose 3.

[0037] In one embodiment, as Figure 1 、 2 shown, the electrodes 2 are in a closed-loop shape, and multiple electrodes 2 are arranged at intervals from the inside to the outside in the horizontal direction. Preferably, the electrodes 2 are in a cylindrical shape, and multiple layers of electrodes 2 together form an electrode column. Of course, the electrodes 2 can also be in a prismatic cylinder shape.

[0038] It should be noted that the electrodes 2 are not limited to the closed-loop shape and can also be arranged in a plate shape.

[0039] In one embodiment, as shown in 1, the cavity of the innermost electrode 2 is blocked to prevent wastewater from passing through. With such a setting, it can be ensured that all the wastewater flowing from the water inlet 11 to the water outlet 12 can be treated. There are various ways of blocking. For example, as Figure 1 shown, sealing covers 5 are respectively arranged at the upper and lower ends of the innermost electrode 2.

[0040] In one embodiment, the material of the electrodes 2 is titanium or stainless steel, and the surface modification process adopts conventional modification methods. The material of the electrodes 2 is not limited to those introduced above. Multiple electrodes 2 are arranged at intervals of anode and cathode.

[0041] Taking the above ideal embodiment based on the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electrocatalytic microchannel organic wastewater treatment device, characterized in that: It includes: A housing (1) with a water inlet (11) provided at the lower end and a water outlet (12) provided at the upper end; Multiple layers of electrodes (2) are arranged at intervals in the horizontal direction within the housing (1) and are located between the water inlet (11) and the water outlet (12); Multiple hoses (3), multiple of the hoses (3) are closely arranged between adjacent electrodes (2). The outer surface of the hose (3) is provided with spiral protrusions, so that there are gaps between the electrode (2) and the hose (3) and between adjacent hoses (3) to serve as microchannels. The lower end is sealed and the upper end extends upward beyond the electrode (2).

2. The electrocatalytic microchannel organic wastewater treatment device according to claim 1, characterized in that: At least part of the tube wall of the hose (3) is provided with air holes for gas passage.

3. The electrocatalytic microchannel organic wastewater treatment device according to claim 2, characterized in that: Multiple hoses (3) between adjacent electrodes (2) are closely arranged in a layer. Among any two adjacent hoses (3), only one hose (3) is provided with the air holes.

4. The electrocatalytic microchannel organic wastewater treatment device according to any one of claims 1-3, characterized in that: It further includes a sieve plate (4). The top of the housing (1) is provided with a ventilation port (13). The sieve plate (4) is installed within the housing (1) and is located below the ventilation port (13); wherein, All hoses (3) converge to the sieve plate (4), and the upper end opening of each hose (3) is closely attached and connected to a sieve hole of the sieve plate (4).

5. The electrocatalytic microchannel organic wastewater treatment device according to claim 1, characterized in that: The electrode (2) is in a closed-loop shape, and multiple electrodes (2) are arranged at intervals from the inside to the outside in the horizontal direction.

6. The electrocatalytic microchannel organic wastewater treatment device according to claim 5, characterized in that: The electrode (2) is in a cylindrical shape.

7. The electrocatalytic microchannel organic wastewater treatment device according to claim 5, characterized in that: The cavity of the innermost electrode (2) is blocked to prevent wastewater from passing through.

8. The electrocatalytic microchannel organic wastewater treatment device according to claim 7, characterized in that: Sealing covers (5) are respectively configured at the upper and lower ends of the innermost electrode (2).

9. The electrocatalytic microchannel organic wastewater treatment device according to claim 1, characterized in that: The material of the electrode (2) is titanium or stainless steel.

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