An immersion sewage treatment device based on surface dielectric barrier discharge

Abstract

An immersion sewage treatment device based on surface dielectric barrier discharge includes: a sewage treatment tank having a reaction chamber; a surface discharge reactor suspended in the reaction chamber of a shell, including an insulating ventilation cavity and a discharge unit, a water storage area is left between the insulating ventilation cavity and the reaction chamber, the insulating ventilation cavity has a ventilation channel, the upper air inlet of the ventilation channel is connected to the air inlet device pipeline, and the bottom is provided with a gas escape port for escaping gas; the discharge unit is arranged on the insulating cavity, and the power connection end of the discharge unit is respectively electrically connected to the positive and negative electrodes of an external power supply to form an electrolysis circuit; and the air inlet device is arranged outside the sewage treatment tank, including an air pump and an air inlet pipe, wherein the air outlet of the air pump is connected to the air channel pipeline of the insulating ventilation cavity through the air inlet pipe. The beneficial effects of the device of the present invention are: reducing the decomposition of ozone in strong oxidizing substances under high temperature conditions, improving its utilization rate, and improving its utilization rate.

Description

Technical Field

[0001] The invention relates to an immersion type sewage treatment device based on surface dielectric barrier discharge, belonging to the field of sewage treatment. Background Art

[0002] Human beings' neglect of the environment has caused increasingly serious environmental pollution problems. A large number of pollutants in water bodies seriously threaten human health. At present, the widely concerned issues in water pollution control are difficult-to-degrade organic matter and inorganic matter that pollutes the environment.

[0003] The dielectric barrier discharge along the surface generates plasma between the electrodes, and the plasma has strong oxidizing properties. It is generally believed that there are two ways for strong oxidizing substances to sterilize in water: one is that the strong oxidizing substances directly act on the cell wall of bacteria, destroy it and cause cell death; the other is that the strong oxidizing substances release free radical oxygen when they decompose in water. Free radical oxygen has strong oxidizing ability and can penetrate the cell wall to oxidize and decompose the glucose oxidase necessary for the oxidation of glucose inside the bacteria. It can also directly act on bacteria and viruses, destroy their organelles and ribonucleic acid, decompose macromolecular polymers such as DNA, RNA, proteins, lipids and polysaccharides, and destroy the bacterial metabolism and reproduction process; it can also penetrate the cell membrane tissue, invade the cell membrane and act on the outer membrane lipoprotein and the internal lipopolysaccharide, promote the dissolution and death of the cell, and kill it. Strong oxidizing substances are used to treat inorganic substances in sewage, and redox reactions occur, so that the low-valent elements in the inorganic molecules are oxidized and converted into substances that do not pollute the environment. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an immersion sewage treatment device based on surface dielectric barrier discharge, which has good ionization effect and improves the efficiency of sewage treatment.

[0005] The immersion type sewage treatment device based on surface dielectric barrier discharge described in the present invention is characterized by comprising:

[0006] A sewage treatment tank having a reaction chamber for containing and treating sewage;

[0007] A surface discharge reactor is suspended in a reaction chamber of a shell, and includes an insulating ventilation chamber and a discharge unit. A water storage area is left between the insulating ventilation chamber and the reaction chamber. The insulating ventilation chamber has a ventilation channel, and an air inlet at the upper part of the ventilation channel is connected to an air inlet device pipeline, and a gas escape port for escaping gas is provided at the bottom; the discharge unit is arranged on the insulating chamber, and the power connection end of the discharge unit is respectively electrically connected to the positive and negative electrodes of an external power supply to form an electrolysis circuit, which is used to ionize the sewage placed in the water storage area;

[0008] And an air intake device is arranged outside the sewage treatment tank, including an air pump and an air intake pipe, wherein the air outlet of the air pump is connected to the ventilation channel pipeline of the insulating ventilation cavity through the air intake pipe, which is used to pump gas into the insulating ventilation cavity.

[0009] The insulating ventilation cavity includes a dielectric glass tube and a sealing cover. The sealing cover is installed at the air inlet at the upper end of the dielectric glass tube. The air vent on the sealing cover is connected to the air inlet pipe and is used to introduce an external gas source into the ventilation channel of the dielectric glass tube. The bottom of the dielectric glass tube is provided with a gas escape port. The discharge unit includes an inner electrode mesh, an outer electrode mesh, an inner electric wire, a connecting wire and an outer electric wire. The inner electrode mesh is arranged in the ventilation channel, and the outer electrode mesh is arranged outside the dielectric glass tube. The inner electrode mesh is electrically connected to the first end of the inner electric wire introduced into the insulating ventilation cavity through the connecting wire, and the other end of the inner electric wire is electrically connected to one of the electrodes of the external power supply. The other electrode of the external power supply is directly introduced into the water containing area through the external electric wire. A discharge gap is left between the inner electrode mesh and the inner wall of the dielectric glass tube.

[0010] A hollow insulating tube is added to the ventilation channel of the dielectric glass tube, and a volume area for accommodating the inner electrode network is reserved between the hollow insulating tube and the dielectric glass tube, and the inner electrode network is kept in non-contact with the hollow insulating tube and the dielectric glass tube.

[0011] The dielectric glass tube and the hollow insulating tube are both hollow circular tubes, and the central axes of the two are on the same straight line.

[0012] A multi-layer bubble crushing layer is added between the inner wall of the reaction chamber and the outer wall of the outer electrode mesh to crush large bubbles of oil-containing strong oxidizing substances escaping through the escape port of the hollow insulating tube.

[0013] The bubble breaking layer includes at least one activated carbon fine-pore sponge layer and at least one coarse-pore sponge layer, and the activated carbon fine-pore sponge layer and the coarse-pore sponge layer are both sleeved on the outer electrode mesh, the outer wall of the activated carbon fine-pore sponge layer and the outer wall of the coarse-pore sponge layer are in contact with the inner wall of the reaction chamber of the sewage treatment tank, and it is ensured that the bottom layer of the bubble breaking layer is the coarse-pore sponge layer.

[0014] Gaps are left between adjacent layers of the bubble crushing layer.

[0015] The beneficial effects of the device of the present invention are as follows: the device is based on surface dielectric barrier discharge to treat sewage, the device body is directly immersed in water, and the surrounding sewage cools the device. During the experiment, high-temperature strong oxidizing substances are generated between the outer electrode mesh and the inner electrode mesh. Under the action of the gas pressure introduced from the air inlet, the generated strong oxidizing substances are directly blown into the sewage, reducing the decomposition of ozone in the strong oxidizing substances under high temperature conditions, improving its utilization rate, and thus improving the efficiency of sewage treatment. The outer electrode mesh is covered with multiple layers of fine-pore sponge and coarse-pore sponge, which play a role in fragmenting large bubbles containing strong oxidizing substances. Small bubbles can increase the total surface area of ​​the bubbles, making the contact between the strong oxidizing substances and the sewage more complete, increasing the efficiency of sewage treatment, and also increasing the effect of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings.

[0018] Refer to the attached figure:

[0019] Embodiment 1 The present invention provides an immersion-type sewage treatment device based on surface dielectric barrier discharge, comprising:

[0020] The sewage treatment tank 1 has a reaction chamber for containing and treating sewage;

[0021] The surface discharge reactor 2 is suspended in the reaction chamber of the shell, and includes an insulating ventilation cavity 21 and a discharge unit 22. A water containing area is left between the insulating ventilation cavity 21 and the reaction chamber. The insulating ventilation cavity 21 has a ventilation channel, and the upper air inlet of the ventilation channel is connected to the air inlet device pipeline, and the bottom is provided with a gas escape port for escaping gas; the discharge unit is arranged on the insulating cavity, and the power connection end of the discharge unit is respectively electrically connected to the positive and negative electrodes of the external power supply to form an electrolysis circuit, which is used to ionize the sewage placed in the water containing area;

[0022] And the air intake device 3 is arranged outside the sewage treatment tank, including an air pump 31 and an air intake pipe 32, wherein the air outlet of the air pump 31 is connected to the ventilation channel pipeline of the insulating ventilation cavity 21 through the air intake pipe 32, which is used to pump gas into the insulating ventilation cavity.

[0023] The insulating ventilation cavity 21 includes a dielectric glass tube 211 and a sealing cover 212. The sealing cover 212 is installed at the air inlet at the upper end of the dielectric glass tube 211. The air vent on the sealing cover 212 is connected to the air inlet pipe 32, and is used to introduce an external gas source into the ventilation channel through the two ends of the dielectric glass tube; a gas escape port is provided at the bottom of the dielectric glass tube 211; the discharge unit 22 includes an inner electrode mesh 221, an outer electrode mesh 222, an inner electric wire 223, a connecting wire 224 and an outer electric wire 225. The inner electrode mesh 221 is arranged in the ventilation channel, and the outer electrode mesh 222 is arranged outside the dielectric glass tube 211, and the inner electrode mesh 221 is electrically connected to the first end of the inner electric wire 223 introduced into the insulating ventilation cavity 21 through the connecting wire 224, and the other end of the inner electric wire 223 is electrically connected to one of the electrodes of the external power supply, and the other electrode of the external power supply is directly introduced into the water containing area through the external electric wire, so that the inner electrode mesh 221 and the outer electrode mesh 222 have opposite electrical properties.

[0024] A discharge gap is left between the inner electrode mesh 221 and the inner wall of the dielectric glass tube 211 .

[0025] A hollow insulating tube 213 is added to the ventilation channel of the dielectric glass tube 211, and a volume area for accommodating the inner electrode mesh is reserved between the hollow insulating tube 213 and the dielectric glass tube 213, and the inner electrode mesh is kept out of contact with the hollow insulating tube 213 and the dielectric glass tube 211.

[0026] The dielectric glass tube 211 and the hollow insulating tube 213 are both hollow circular tubes, but both ends of the hollow insulating tube are sealed, and gas cannot enter the inner cavity thereof; the central axes of the dielectric glass tube and the hollow insulating tube are on the same straight line.

[0027] A multi-layer bubble crushing layer is added between the inner wall of the reaction chamber and the outer wall of the outer electrode mesh to crush large bubbles of oil-containing strong oxidizing substances escaping through the escape port of the hollow insulating tube.

[0028] The bubble breaking layer includes at least one layer of activated carbon fine-pore sponge layer 11 and at least one layer of coarse-pore sponge layer 12, and the activated carbon fine-pore sponge layer 11 and the coarse-pore sponge layer 12 are both sleeved on the outer electrode mesh 222, and the outer wall of the activated carbon fine-pore sponge layer 11 and the outer wall of the coarse-pore sponge layer 12 are in contact with the inner wall of the reaction chamber of the sewage treatment tank 1, and ensure that the bottom layer of the bubble breaking layer is the coarse-pore sponge layer.

[0029] There are gaps between adjacent layers of the bubble crushing layer.

[0030] Embodiment 2 In an immersion-type sewage treatment device based on surface dielectric barrier discharge described in the present invention: the components of the surface discharge reactor are designed as an integrated molding, the inner wire is inserted into the hollow insulating tube, and is connected to the inner electrode net through the connecting wire, and the outer end is connected to one of the electrodes of the external power supply after being led out of the sealed end cap, and one end of the outer wire is connected to the other electrode of the external power supply, so that positive and negative electrodes can be formed between the inner electrode net and the outer electrode net; the outer electrode net is tightly attached to the outer wall of the dielectric glass tube, and the surface dielectric barrier discharge occurs between the inner electrode net and the outer electrode net. When the inner electrode net and the outer electrode net are discharged, strong oxidizing substances will be generated. Under the pressure of the gas blown in by the air inlet pipe, the gas containing strong oxidizing substances will escape from the gas escape port at the bottom end of the dielectric glass tube. The outer electrode net is covered with an activated carbon fine-pore sponge and a coarse-pore sponge, which plays a role in fragmenting large bubbles containing strong oxidizing substances. Small bubbles can increase the total surface area of ​​the bubbles, so that the contact between the strong oxidizing substances and the sewage is more complete, which increases the efficiency of sewage treatment and also increases the effect of sewage treatment. When the device treats sewage, the surface discharge reactor is first immersed in the sewage, and after the air pump is turned on, the external electric wire is inserted into the sewage; the figure shows that the bottom is a coarse-pored sponge and the top is an activated carbon fine-pored sponge. The pore size of the coarse-pored sponge is 15ppi, and the pore size of the activated carbon fine-pored sponge is 50ppi. (ppi refers to the number of pores arranged in 1 inch length).

[0031] The surface discharge reactor is immersed in sewage contained in the sewage treatment tank, and the surrounding sewage plays a cooling role on the inner electrode mesh, the outer electrode mesh and the dielectric glass tube.

[0032] The strong oxidizing substances generated between the inner electrode mesh and the outer electrode mesh do not need to be cooled, but are directly blown into the sewage under the action of the gas blown in from the intake pipe, where they will be directly cooled by the sewage, thereby reducing the decomposition of ozone in the strong oxidizing substances under high temperature conditions.

[0033] The strong oxidizing substances generated between the inner electrode mesh and the outer electrode mesh do not need to be cooled. After being blown into the sewage, the temperature of the sewage will be increased, thereby promoting the efficiency of the experiment.

[0034] The bubble crushing layer comprises an activated carbon fine-porous sponge layer 11 and two coarse-porous sponge layers 12, wherein the two coarse-porous sponge layers 12 are located on the outside and the activated carbon fine-porous sponge layer 11 is located on the inside.

[0035] The multi-layer activated carbon fine-pore sponge 11 and the coarse-pore sponge 12 break up the large bubbles containing the strong oxidizing substances, and the small bubbles can increase the total surface area of ​​the bubbles, so that the strong oxidizing substances can contact with the sewage more completely, thereby increasing the efficiency of sewage treatment.

[0036] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. An immersion sewage treatment device based on surface dielectric barrier discharge, characterized in that: include: A sewage treatment tank having a reaction chamber for containing and treating sewage; A surface discharge reactor is suspended in a reaction chamber of a shell, and includes an insulating ventilation chamber and a discharge unit. A water storage area is left between the insulating ventilation chamber and the reaction chamber. The insulating ventilation chamber has a ventilation channel, and an air inlet at the upper part of the ventilation channel is connected to an air inlet device pipeline, and a gas escape port for escaping gas is provided at the bottom; the discharge unit is arranged on the insulating chamber, and the power connection end of the discharge unit is respectively electrically connected to the positive and negative electrodes of an external power supply to form an electrolysis circuit, which is used to ionize the sewage placed in the water storage area; and an air intake device, which is arranged outside the sewage treatment tank and includes an air pump and an air intake pipe, wherein the air outlet of the air pump is connected to the air passage pipeline of the insulating ventilation cavity through the air intake pipe, and is used to pump gas into the insulating ventilation cavity; The insulating ventilation cavity comprises a dielectric glass tube and a sealing cover, the sealing cover is installed at the air inlet at the upper end of the dielectric glass tube, the air vent on the sealing cover is connected to the air inlet pipe, and is used to introduce an external gas source into the ventilation channel of the dielectric glass tube; a gas escape port is provided at the bottom of the dielectric glass tube; the discharge unit comprises an inner electrode mesh, an outer electrode mesh, an inner electric wire, a connecting wire and an outer electric wire, the inner electrode mesh is arranged in the ventilation channel, and the outer electrode mesh is arranged outside the dielectric glass tube, the inner electrode mesh and the outer electrode mesh are arranged on the wall of the dielectric glass tube, and the inner electrode mesh is electrically connected to the first end of the inner electric wire introduced into the insulating ventilation cavity through the connecting wire, the other end of the inner electric wire is electrically connected to one of the electrodes of the external power supply, and the other electrode of the external power supply is directly introduced into the water containing area through the external electric wire; A discharge gap is left between the inner electrode mesh and the inner wall of the dielectric glass tube; A hollow insulating tube is added to the ventilation channel of the dielectric glass tube, and a volume area for accommodating the inner electrode mesh is reserved between the hollow insulating tube and the dielectric glass tube, and the inner electrode mesh is kept in non-contact with the hollow insulating tube and the dielectric glass tube; The dielectric glass tube and the hollow insulating tube are both hollow circular tubes, and the central axes of the two are on the same straight line.

2. The immersion sewage treatment device based on surface dielectric barrier discharge according to claim 1, characterized in that: A multi-layer bubble crushing layer is added between the inner wall of the reaction chamber and the outer wall of the outer electrode mesh to crush large bubbles of oil-containing strong oxidizing substances escaping through the escape port of the hollow insulating tube.

3. The immersion sewage treatment device based on surface dielectric barrier discharge according to claim 2, characterized in that: The bubble breaking layer includes at least one activated carbon fine-pore sponge layer and at least one coarse-pore sponge layer, and the activated carbon fine-pore sponge layer and the coarse-pore sponge layer are both sleeved on the outer electrode mesh, the outer wall of the activated carbon fine-pore sponge layer and the outer wall of the coarse-pore sponge layer are in contact with the inner wall of the reaction chamber of the sewage treatment tank, and it is ensured that the bottom layer of the bubble breaking layer is the coarse-pore sponge layer.

4. The immersion sewage treatment device based on surface dielectric barrier discharge according to claim 3, characterized in that: There are gaps between adjacent layers of the bubble crushing layer.

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