Microwave plasma carbon fiber production line waste gas treatment device

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to a microwave plasma carbon fiber production line waste gas treatment device which comprises a microwave generator, a waveguide tube group, a torch treatment chamber, a blanking port, a heat exchanger, a working fan, an induced draft fan and a buffer tank, various gases such as high-purity elementary gas, inert gas and waste gas to be treated can be used according to the working environment requirement, except for the working gas, the equipment can normally operate only by circulating cooling water and stable power supply, other auxiliary materials do not need to be provided, and the equipment is small in overall size and small in occupied area.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and specifically relates to a waste gas treatment device for a microwave plasma carbon fiber production line. Background Art

[0002] During the carbon fiber production process, hydrogen cyanide, ammonia, carbon monoxide, tar, HCB hydrocarbons, silica particles, combustibles, etc. are produced.

[0003] The commonly used methods for treating waste gas from carbon fiber production lines include adsorption, combustion, absorption and condensation.

[0004] Adsorption: A porous solid adsorbent (such as activated carbon) is used to absorb harmful components from exhaust gas through chemical bonds or molecular attraction, securing them to the adsorbent's surface and thereby purifying the exhaust gas. This method is suitable for purifying low-concentration organic waste gas with high air volume, no particulate matter, no sticky matter, and at room temperature. However, the adsorbent must be regularly replaced or regenerated, and replaced saturated adsorbent must also be treated as hazardous waste.

[0005] Combustion methods are categorized into direct combustion, thermal combustion, and catalytic combustion. Direct combustion is suitable for high-concentration exhaust gases exceeding 5000 mg / m³. Thermal combustion, by adding other fuels or combustion-supporting gases, is used to treat exhaust gases with concentrations between 1000 and 5000 mg / m³. Catalytic combustion uses a catalyst to oxidize and decompose organic pollutants in the exhaust gas. This generates high temperatures, requiring careful attention to equipment safety. Precious metal catalysts are susceptible to poisoning and failure, requiring strict control of air intake conditions. Furthermore, the equipment used in combustion methods occupies a large area.

[0006] Absorption method: This method uses acidic or alkaline solvents to chemically react with organic pollutants in the exhaust gas. This method is highly efficient and provides thorough purification, but the waste liquid after treatment has low recyclability. If it cannot be recycled, it must be treated as a hazardous waste.

[0007] Condensation method: By lowering the temperature, organic pollutants in the exhaust gas are condensed into liquid, thereby separating them from the exhaust gas. However, the resulting condensate is only a gas-liquid conversion of the pollutants and is still a hazardous waste, requiring hazardous waste treatment.

[0008] In summary, the several commonly used carbon fiber production line waste gas treatment methods on the market have the following problems: the equipment occupies a large area, and there are problems with the addition, replacement and post-processing of auxiliary materials during actual long-term operation. Utility Model Content

[0009] In order to solve the problems raised in the above background technology, the utility model provides a microwave plasma carbon fiber production line exhaust gas treatment device, including a microwave generator, a waveguide tube group, a torch treatment chamber, a blanking port, a heat exchanger, a working fan, an induced draft fan and a buffer tank;

[0010] A microwave generator, the microwave generator being mounted on one end of the waveguide assembly;

[0011] a waveguide tube group, wherein the other end of the waveguide tube group is connected to one end of the torch processing chamber;

[0012] A flare treatment chamber, wherein a material drop opening is provided at the bottom of the other end of the flare treatment chamber, and the top of the flare treatment chamber is connected to the heat exchanger;

[0013] A heat exchanger, wherein a working fan is provided at one end of the heat exchanger and an induced draft fan is provided at the other end;

[0014] Buffer tanks are connected to the flare processing chamber and the heat exchanger through pipelines.

[0015] As a microwave plasma carbon fiber production line exhaust gas treatment device of the present invention, preferably, the bottom of the heat exchanger is inclined.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This practical microwave plasma carbon fiber production line waste gas treatment equipment generates a high-temperature plasma torch through microwave ionization of the working gas. The center temperature of the torch can reach up to 6000K. It has physical and chemical characteristics such as high temperature, high enthalpy, and high oxidizing properties. The equipment uses the material and chemical characteristics of the high-temperature plasma torch to quickly crack and oxidize organic matter and combustibles in the production line waste gas, causing them to recombine into simple gases such as CO2, H2O, and NOX.

[0018] The equipment operates with standard air as the working gas, but can also be substituted with high-purity elemental gases, inert gases, or treated waste gases, depending on the operating environment. Besides the working gas, the equipment requires only circulating cooling water and a stable power supply for normal operation. No other auxiliary materials are required, resulting in a compact overall size and minimal footprint. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a front view structural diagram of the utility model;

[0021] In the picture:

[0022] 1. Microwave generator; 2. Microwave generator; 3. Flare treatment chamber; 4. Dropping port; 5. Heat exchanger; 6. Working fan; 7. Induced draft fan; 8. Buffer tank. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0024] like Figure 1 As shown;

[0025] A microwave plasma carbon fiber production line waste gas treatment device.

[0026] In this embodiment: In order to solve the technical problems existing in the prior art, a microwave plasma carbon fiber production line exhaust gas treatment device is provided.

[0027] like Figure 1 As shown in the figure;

[0028] In combination with the above contents, it includes a microwave generator 1, a waveguide assembly 2, a torch processing chamber 3, a material drop port 4, a heat exchanger 5, a working fan 6, an induced draft fan 7 and a buffer tank 8;

[0029] A microwave generator 1 is mounted on one end of a waveguide assembly 2;

[0030] a waveguide tube group 2, wherein the other end of the waveguide tube group 2 is connected to one end of the torch treatment chamber 3;

[0031] A flare treatment chamber 3, wherein a material drop opening 4 is provided at the bottom of the other end of the flare treatment chamber 3, and the top of the flare treatment chamber 3 is connected to a heat exchanger 5;

[0032] A heat exchanger 5, wherein a working fan 6 is provided at one end of the heat exchanger 5 and an induced draft fan 7 is provided at the other end;

[0033] The buffer tank 8 is connected to the flare treatment chamber 3 and the heat exchanger 5 through pipelines.

[0034] In one embodiment, the bottom of the heat exchanger 5 is inclined.

[0035] The working principle of this utility model:

[0036] First, microwaves are generated by 1 microwave generator, and the microwaves are transmitted to 3 torch treatment chamber through 2 waveguide groups to generate plasma torches. The exhaust gas from the production line first enters 8 buffer tanks to settle the solid particles inside. There is a drop port at the bottom of 8 buffer tanks to collect the settled particles. Then the exhaust gas enters 3 torch treatment chambers through the feed interface of 3 torch treatment chambers for treatment; the treated exhaust gas enters 5 heat exchangers through the tail of 3 torch treatment chambers; at the same time, 4 drop ports are designed at the tail of 3 torch treatment chambers to discharge the solid particles contained in the exhaust gas. The working gas provided by 6 working fans will enter 5 heat exchangers and exchange heat with the exhaust gas, thereby recovering heat and improving the thermal efficiency of the equipment; the bottom of 5 heat exchangers is designed with an inclined design, which can allow the solid particles settled in the heat exchanger to fall back into 4 drop ports through the interface. Finally, the exhaust gas after heat exchange is discharged through 7 induced draft fans.

[0037] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are 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 will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A microwave plasma carbon fiber production line exhaust gas treatment device, characterized in that: It includes a microwave generator (1), a waveguide tube group (2), a torch processing chamber (3), a material drop port (4), a heat exchanger (5), a working fan (6), an induced draft fan (7) and a buffer tank (8); A microwave generator (1), the microwave generator (1) being mounted on one end of the waveguide tube assembly (2); A waveguide tube group (2), the other end of the waveguide tube group (2) being connected to one end of the torch treatment chamber (3); A flare treatment chamber (3), wherein a material drop opening (4) is provided at the bottom of the other end of the flare treatment chamber (3), and the top of the flare treatment chamber (3) is connected to a heat exchanger (5); A heat exchanger (5), wherein a working fan (6) is provided at one end of the heat exchanger (5), and an induced draft fan (7) is provided at the other end thereof; The buffer tank (8) is connected to the flare treatment chamber (3) and the heat exchanger (5) through a pipeline.

2. The microwave plasma carbon fiber production line exhaust gas treatment device according to claim 1, characterized in that: The bottom of the heat exchanger (5) is inclined.

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