Device for treating VOC (volatile organic compounds) and PM2.5 (particulate matter 2.5) through superimposed oxidation

Abstract

The utility model belongs to the field of gas pollution treatment equipment, and particularly relates to a device for treating VOC (volatile organic compound) and PM2.5 (particulate matter 2.5) through superposition oxidation, which comprises a shell provided with a gas inlet and a gas outlet, a negative electrode assembly and a positive electrode assembly which are arranged in pairs are arranged in the shell, a discharge structure is arranged on the negative electrode assembly, and a discharge structure is arranged on the positive electrode assembly. And the discharge structure is arranged towards the positive electrode assembly. According to the utility model, the negative electrode assembly discharges towards the positive electrode assembly to form an electric field and generate the electron jet flow, organic gas molecules and particulate matters in gas are bombarded into an ionic state through the electron jet flow and are subjected to oxidation reaction with oxygen in the air, and finally carbon dioxide and water are formed, so that the purpose of green pollution treatment is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of gas pollution control equipment, and specifically relates to a device for superimposed oxidation control of VOC and PM2.5. Background Art

[0002] The composition of VOC waste gas is complex, mainly containing benzene, hydrocarbons, non-methane total hydrocarbons, etc., which is difficult to treat. In addition, the waste gas contains a certain amount of organic solid particles, which can easily cause PM2.5 pollution.

[0003] Traditional tail gas treatment processes usually use physical adsorption to filter gas, such as activated carbon, inorganic mineral fillers, etc. Although traditional processes have made great contributions to tail gas treatment, the fillers become solid hazardous waste after saturation. Secondary pollution will occur during the regeneration of the fillers.

[0004] Although electrochemical and catalytic oxidation processes are more efficient than physical adsorption and do not produce solid hazardous waste, technical barriers make the equipment bulky and the operating costs high, which also causes confusion for enterprises. Utility Model Content

[0005] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a device for superimposed oxidation treatment of VOC and PM2.5, which can reduce the cost of exhaust gas treatment, has a simple structure, and reduces equipment investment.

[0006] The specific technical solution adopted by the utility model is:

[0007] A device for superimposed oxidation treatment of VOC and PM2.5, comprising a shell provided with an air inlet and an exhaust port, an oxidation component provided in the shell, the oxidation component being provided with a negative electrode component, a positive electrode component and a negative electrode component in sequence along the exhaust gas conveying direction in the shell, a discharge structure being provided on the negative electrode component, the discharge structure being arranged toward the positive electrode component, and a voltage being connected between the negative electrode component and the positive electrode component.

[0008] The cross section of the shell is circular or square.

[0009] The negative electrode assembly comprises a conductive seat and a discharge structure arranged on the conductive seat. The conductive seat is supported in the inner cavity of the shell by means of a negative electrode insulating rod, and the discharge structure is a discharge needle with a needle-like structure.

[0010] The oxidation components are arranged in multiple groups along the conveying direction of the exhaust gas.

[0011] The positive electrode assembly includes a positive electrode insulating rod and a positive electrode ring. The diameter of the positive electrode ring is larger than the diameter of the conductive seat. The conductive seat is located at the center of the positive electrode ring. The discharge needle is arranged along the connection direction from the conductive seat to the positive electrode ring.

[0012] The power between the negative electrode assembly and the positive electrode assembly is 1-100kw.

[0013] The beneficial effects of the utility model are:

[0014] The utility model adopts the discharge of the negative electrode component toward the positive electrode component to form an electric field and generate an electron jet, through which the organic gas molecules and particulate matter in the gas are bombarded into an ion state, and an oxidation reaction occurs with oxygen in the air, and finally carbon dioxide and water are formed, thereby achieving the purpose of green pollution control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] In the attached drawings, 1, shell, 2, discharge structure, 3, conductive seat, 4, negative electrode insulating rod, 5, positive electrode insulating rod, 6, positive electrode ring. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0018] Specific implementation examples Figure 1 As shown, the utility model is a device for superimposed oxidation treatment of VOC and PM2.5, including a shell 1 provided with an air inlet and an exhaust port, an oxidation component is provided in the shell 1, and the oxidation component is provided with a negative electrode component, a positive electrode component and a negative electrode component in sequence along the exhaust gas conveying direction in the shell 1, a discharge structure 2 is provided on the negative electrode component, and the discharge structure 2 is arranged toward the positive electrode component, the negative electrode component is connected to the negative electrode voltage, and the positive electrode component is connected to the positive electrode voltage.

[0019] When the negative electrode assembly is discharging toward the positive electrode assembly, the electrons obtain energy from the electric field and convert the energy into the internal kinetic energy of the pollutant molecules through collision. These molecules that obtain energy are excited or ionized to form active groups. At the same time, the oxygen and moisture in the air produce a large number of active groups such as hydrogen, oxygen, dioxygen, and hydroxyl oxygen under the action of high-energy electrons. These active groups collide with each other and trigger a physical and chemical reaction. It can be seen from the active groups that when electrons are released, the electric field space is rich in chemically active ions, and the pollutants in the waste gas react with these highly active groups and are eventually oxidized into carbon dioxide and water. The purpose of purifying the waste gas is achieved.

[0020] The utility model arranges two groups of negative electrode components to sandwich the positive electrode component, so that the negative electrode components on both sides share the middle positive electrode component to form a superimposed structure. When the exhaust gas flows, it is first oxidized between the negative electrode component and the positive electrode component on one side, and then as the exhaust gas continues to flow, it contacts the electric field of the negative electrode component and the positive electrode component on the other side. If there are pollutants that are not completely oxidized, the secondary breakdown of the accessory component on the other side causes the pollutants to be re-attracted back to the positive electrode component under the action of the electric field, and the secondary oxidation is completed within the range of the electric field. That is, through the double-stage setting, the pollutant molecules and particles are charged, so that they can complete oxidation decomposition in the electric field.

[0021] The utility model adopts positive and negative bipolar oxidation technology to overcome the shortcomings of traditional harmful gas technologies such as adsorption, catalytic oxidation, and combustion treatment. In terms of economy, the equipment has a compact structure, small size, and operates at normal temperature and pressure. The process adopts a composite bipolar oxidation technology; a single or multiple groups of double-stage electron emission devices are set, and the number of electric field electron emission (corona discharge) is increased by 1000 times through dense electric field conditions. When the average energy of electrons exceeds the chemical bond energy of the target treated molecules, the molecular chain is disconnected. Due to the formation of gapless three-dimensional electronic space by bipolar oxidation, the push-pull force formed by the electron emission of the electrodes sends the harmful gas into the oxidation layer formed by the electron jet. When the gas passes at a speed of 3-10 meters per second, the organic volatile matter is instantly decomposed. This technology for treating industrial waste gas is not a water washing technology, but a high-density electron flow directly bombards and breaks down the pollutants to break the molecular chain, and the removal rate of pollutants is more than 95%. The organic volatile gas is completely decomposed into carbon dioxide and water.

[0022] Furthermore, the cross section of the shell 1 is circular or square.

[0023] Furthermore, the negative electrode assembly includes a conductive seat 3 and a discharge structure 2 disposed on the conductive seat 3. The conductive seat 3 is supported in the inner cavity of the shell 1 by means of a negative electrode insulating rod 4. The discharge structure 2 is a discharge needle with a needle-like structure.

[0024] The oxidation components are arranged in multiple groups along the conveying direction of the exhaust gas.

[0025] The positive electrode assembly includes a positive electrode insulating rod 5 and a positive electrode ring 6. The diameter of the positive electrode ring 6 is larger than the diameter of the conductive seat 3. The conductive seat 3 is located at the center of the positive electrode ring 6. The discharge needle is arranged along the connecting line from the conductive seat 3 to the positive electrode ring 6.

[0026] like Figure 1As shown, the spherical conductive seat 3 is connected to the DC negative pole, and is suspended in the center of the positive ring 6 with the help of the negative insulating rods 4 arranged in a spoke shape. With the help of the discharge of the discharge needle, a cap-shaped electric field is formed covering the positive ring 6. Electrons flow along the direction of the electric field to form an oxide layer. When the exhaust gas enters from the right side, the exhaust gas is fully bombarded.

[0027] The power between the negative electrode assembly and the positive electrode assembly is 1-100kw.

[0028] The process is implemented as follows: according to the original induced draft fan in the workshop, after the original equipment outlet, disconnect the original exhaust channel and install a set of bipolar oxidation system of the utility model. Change the angle of the elbow of the wind tube to return the return air treated by the utility model to the workshop.

[0029] The shell 1 is cylindrical, and the shell 1 has a circular or square inlet and outlet that are connected to the original system.

[0030] Even if the harmful substances contained in the gas cannot be decomposed 100% in the first time, the second bombardment and breakdown process can be carried out in series. Through repeated treatment, the gaseous pollutants can be completely (100%) eliminated to achieve the purpose of purifying the gas. This process not only decomposes organic gas VOC to 100%, but also can treat 23-500 nanometer dust particles to 99.999%, and the inactivation rate of bacteria and viruses in the recycled air is 100%. The quality of the recycled air after the bipolar oxidation process is much higher than the original air quality. It can be circulated in the workshop. Achieve the goal of zero emission. There is no impact on the atmospheric environment.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for superimposed oxidation treatment of VOC and PM2.5, characterized by: The invention comprises a shell (1) provided with an air inlet and an air outlet, wherein an oxidation assembly is provided in the shell (1), wherein the oxidation assembly is provided with a negative electrode assembly, a positive electrode assembly and a negative electrode assembly in sequence in the shell (1) along the exhaust gas conveying direction, wherein a discharge structure (2) is provided on the negative electrode assembly, wherein the discharge structure (2) is arranged toward the positive electrode assembly, and a voltage is connected between the negative electrode assembly and the positive electrode assembly.

2. The device for superimposed oxidation treatment of VOC and PM2.5 according to claim 1 is characterized in that: The cross section of the shell (1) is circular or square.

3. The device for superimposed oxidation treatment of VOC and PM2.5 according to claim 1 is characterized in that: The negative electrode assembly comprises a conductive seat (3) and a discharge structure (2) arranged on the conductive seat (3); the conductive seat (3) is supported in the inner cavity of the shell (1) by means of a negative electrode insulating rod (4); and the discharge structure (2) is a discharge needle with a needle-like structure.

4. The device for superimposed oxidation treatment of VOC and PM2.5 according to claim 1 is characterized in that: The oxidation components are arranged in multiple groups along the conveying direction of the exhaust gas.

5. The device for superimposed oxidation treatment of VOC and PM2.5 according to claim 3 is characterized by: The positive electrode assembly comprises a positive electrode insulating rod (5) and a positive electrode ring (6), the diameter of the positive electrode ring (6) is greater than the diameter of the conductive seat (3), the conductive seat (3) is located at the center of the positive electrode ring (6), and the discharge needle is arranged along the connecting line direction from the conductive seat (3) to the positive electrode ring (6).

6. The device for superimposed oxidation treatment of VOC and PM2.5 according to claim 1, characterized in that: The power between the negative electrode assembly and the positive electrode assembly is 1-100kw.

Images