A device for microwave treatment of industrial exhaust gases

Abstract

The utility model discloses a device of microwave processing industrial waste gas, including the shell, be provided with microwave plasma torch in the shell, and the shell is continuously connected with the heat exchange pipeline, the heat exchange pipeline includes the setting on the shell's sink, be provided with the air inlet pipe in the sink, and the air inlet pipe is close to the side wall of microwave plasma torch with the shell intercommunication setting, the shell still is continuously connected with the air outlet pipe, the outer wall fixed connection of air outlet pipe has the heat exchange pipe of spiral shape, in the utility model, through setting heat exchange pipeline, can first utilize heat exchange pipe to carry out heat exchange to the gas after thermal cracking processing and the waste gas to be handled before the waste gas enters the shell, utilize the air inlet pipe to the waste gas to be handled further heating, make the waste gas temperature rapidly increase, and then make microwave plasma torch can heat the waste gas to the temperature of thermal cracking fast, realize the treatment to the waste gas, improve the waste gas processing efficiency, reduce the energy consumption of waste gas processing simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a device for microwave treatment of industrial waste gas. Background Technology

[0002] Microwave exhaust gas treatment equipment is a high-efficiency exhaust gas treatment equipment that combines microwave technology with environmental protection processes. Its core principle is to use the thermal and non-thermal effects of microwaves to decompose or transform pollutants. Microwaves generate heat energy by exciting the high-frequency vibration of polar molecules in the exhaust gas, which rapidly raises the temperature of pollutants to the decomposition temperature.

[0003] High-concentration waste gas requires microwave pyrolysis treatment, which demands temperatures of 800-1200℃. However, before microwave treatment, industrial waste gas often needs to be sprayed and filtered to remove dust and other particulate matter, which lowers the waste gas temperature and increases the energy consumption of subsequent pyrolysis treatment. Therefore, we propose a microwave treatment device for industrial waste gas to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a microwave treatment device for industrial waste gas.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for microwave treatment of industrial waste gas includes a housing, a microwave plasma torch disposed inside the housing, and a heat exchange component connected to the housing.

[0007] The heat exchange assembly includes a recessed groove on the outer shell, an air inlet pipe is provided in the recessed groove and the air inlet pipe is connected to the side wall of the outer shell near the microwave plasma torch. The outer shell is also connected to an air outlet pipe. A spiral heat exchange tube is fixedly connected to the outer wall of the air outlet pipe and is connected to the air inlet pipe. An adapter is connected to the end of the heat exchange tube away from the air inlet pipe.

[0008] Preferably, the end of the heat exchange tube near the air inlet pipe is connected to a conical shell, the air inlet pipe is connected to the conical shell, and the end of the conical shell near the air inlet pipe is provided with multiple branch pipes, which are connected to the air inlet pipe.

[0009] Preferably, one end of the air intake pipe is fixedly connected to an inclined guide nozzle, the guide nozzle being conical and extending through the outer shell into the outer shell.

[0010] Preferably, a heat insulation sleeve is fixedly connected to the end of the outer shell away from the gas outlet pipe, and the heat insulation sleeve covers the microwave plasma torch.

[0011] Preferably, the outer shell and the air inlet pipe are both integrally formed from ceramic material, and both the air inlet pipe and the heat exchange pipe are flat pipes.

[0012] Preferably, the end of the heat insulation sleeve away from the outer shell is fixedly connected to the heat dissipation shell, and the two sides of the heat dissipation shell are connected to the water inlet pipe and the water outlet pipe.

[0013] Preferably, the heat dissipation shell is an annular shell, and the heat dissipation shell is fitted onto the tail end of the microwave plasma torch.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, by setting up a heat exchange pipe, can first use the heat exchange pipe to exchange heat with the gas after thermal decomposition treatment and the waste gas to be treated before the waste gas enters the shell. Then, the inlet pipe is used to further heat the waste gas to be treated, so that the temperature of the waste gas rises rapidly. This allows the microwave plasma torch to quickly heat the waste gas to the thermal decomposition temperature, thereby treating the waste gas, improving the waste gas treatment efficiency, and reducing the energy consumption of waste gas treatment.

[0016] 2. This utility model, by setting a conical shell in conjunction with a guide plate, can more evenly disperse the exhaust gas, so that the exhaust gas can be nearly evenly distributed into different air inlet pipes, ensuring the preheating effect of the exhaust gas. By setting a guide nozzle, the exhaust gas entering the shell can form a spiral airflow, which can be better heated by the microwave plasma torch and fully thermally decomposed, ensuring the treatment effect of the exhaust gas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a microwave treatment device for industrial waste gas proposed in this utility model.

[0018] Figure 2 This is a side sectional view of a microwave treatment device for industrial waste gas proposed in this utility model.

[0019] Figure 3 This is a cross-sectional structural schematic diagram of a microwave treatment device for industrial waste gas proposed in this utility model.

[0020] Figure 4 This is a cross-sectional structural diagram of a microwave treatment device for industrial waste gas proposed in this utility model.

[0021] In the diagram: 1. Outer shell; 2. Settling tank; 3. Inlet pipe; 4. Outlet pipe; 5. Heat exchanger pipe; 6. Adapter; 7. Conical shell; 8. Diverter pipe; 9. Flow guide nozzle; 10. Heat insulation jacket; 11. Heat dissipation shell; 12. Water inlet pipe; 13. Water outlet pipe; 14. Microwave plasma torch. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 A device for microwave treatment of industrial waste gas includes a housing 1, a microwave plasma torch 14 disposed inside the housing 1, and a heat exchange component connected to the housing 1.

[0024] A microwave plasma torch is a device that uses microwave energy to excite gas molecules to generate high-temperature plasma. Its core structure includes a microwave input waveguide, a resonant cavity, and a reaction cavity. Through microwave energy distribution and the action of a high-intensity electric field, gas ionization is achieved to form a stable plasma flame. Compared with traditional arc plasma technology, microwave excitation does not require a mechanical ignition device and can operate efficiently under normal pressure. It has low energy consumption and good high-temperature output capability, which can meet the requirements for thermal decomposition of harmful substances in exhaust gas.

[0025] The heat exchange assembly includes a recess 2 formed on the outer shell 1, an air inlet pipe 3 is provided in the recess 2, and the air inlet pipe 3 is connected to the side wall of the outer shell 1 near the microwave plasma torch 14. The air inlet pipe 3 penetrates the outer shell 1 and extends into the outer shell 1. The outer shell 1 is also connected to an air outlet pipe 4. A spiral heat exchange pipe 5 is fixedly connected to the outer wall of the air outlet pipe 4, and the heat exchange pipe 5 is connected to the air inlet pipe 3. The end of the heat exchange pipe 5 away from the air inlet pipe 3 is connected to an adapter 6.

[0026] Based on the above design, the settling tank 2 is arranged around the outer shell 1, while the air inlet pipe 3 is located inside the settling tank 2. This can increase the contact area between the air inlet pipe 3 and the inner wall of the settling tank 2, thereby increasing the heat exchange area and promoting rapid heating of the exhaust gas. Moreover, multiple air inlet pipes 3 cover the outer shell 1, reducing heat loss and improving the thermal efficiency of the entire exhaust gas treatment device. The exhaust pipe 4 works in conjunction with the heat exchange pipe 5. When the exhaust gas from thermal decomposition is discharged through the exhaust pipe 4, it will exchange heat with the heat exchange pipe 5 to preheat the exhaust gas after spraying and filtration, making full use of the waste heat of the exhaust gas to heat the exhaust gas. It can be combined with the air inlet pipe 3 to enable the exhaust gas to quickly reach the thermal decomposition temperature after entering the outer shell 1, meeting the requirements for exhaust gas treatment. The adapter 6 is used to connect the heat exchange pipe 5 to the exhaust gas delivery pipeline.

[0027] Furthermore, the heat exchange tube 5 is connected to a conical shell 7 at one end near the air inlet pipe 3, the air inlet pipe 3 is connected to the conical shell 7, and the conical shell 7 is provided with a plurality of branch pipes 8 at one end near the air inlet pipe, and the branch pipes 8 are connected to the air inlet pipe 3.

[0028] In this design, the outer shell 1 is connected to the outlet pipe 4 through a conical pipe. The conical shell 7 is used to cover this section of pipe to prevent heat loss. The diversion pipe 8 is used to guide the exhaust gas into the inlet pipe 3 after the exhaust gas enters the conical shell 7 through the heat exchange pipe 5.

[0029] Furthermore, one end of the air intake pipe 3 is fixedly connected to an inclined guide nozzle 9, the guide nozzle 9 being conical, the guide nozzle 9 penetrating the outer shell 1 and extending into the outer shell 1;

[0030] Multiple guide nozzles 9 are oriented along the tangent of the same circle, and the guide nozzles 9 are inclined toward the exhaust pipe 4. This design allows the exhaust gas to form a swirling flow inside the outer shell 1 after entering the outer shell 1, so that it can be heated better and more evenly by the microwave plasma torch 14, ensuring that the exhaust gas can be heated to the temperature of thermal decomposition.

[0031] Furthermore, a heat insulation sleeve 10 is fixedly connected to the end of the outer shell 1 away from the gas outlet pipe 4, and the heat insulation sleeve 10 covers the microwave plasma torch 14.

[0032] The outer casing 1 will be heated during the long-term exhaust gas treatment process. Although the plasma flame generated by the microwave plasma torch 14 has a high temperature, the generating equipment cannot operate at a high temperature. Therefore, the heat insulation sleeve 10 is set to prevent the microwave plasma torch 14 from overheating and stopping operation or even being damaged.

[0033] Furthermore, both the outer shell 1 and the air inlet pipe 3 are integrally formed from ceramic material, and both the air inlet pipe 3 and the heat exchange pipe 5 are flat pipes;

[0034] The ceramic outer shell 1 and the air inlet pipe 3 have better high temperature resistance and service life. In particular, the temperature of exhaust gas pyrolysis treatment often needs to reach 800-1200 degrees Celsius. The use of flat tubes improves the heat exchange effect. Exhaust gas itself has poor thermal conductivity, and flat tubes can ensure that the exhaust gas in the air inlet pipe 3 and heat exchange tube 5 is completely heated.

[0035] Furthermore, the end of the heat insulation sleeve 10 away from the outer shell 1 is fixedly connected to the heat dissipation shell 11. The two sides of the heat dissipation shell 11 are connected to the water inlet pipe 12 and the water outlet pipe 13. The heat dissipation shell is an annular shell. The heat dissipation shell is sleeved on the tail end of the microwave plasma torch. The water inlet pipe 12 and the water outlet pipe 13 are connected to the water supply pipeline. The heat dissipation shell 11 uses the cooling water transported by the water supply pipeline to cool down the microwave plasma torch 14 and ensure the stable operation of the microwave plasma torch 14.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A microwave treatment device for industrial waste gas, comprising a housing (1), characterized in that, A microwave plasma torch (14) is provided inside the outer shell (1), and a heat exchange component is connected to the outer shell (1); The heat exchange assembly includes a recess (2) formed on the outer shell (1), an air inlet pipe (3) is provided in the recess (2), and the air inlet pipe (3) is connected to the side wall of the outer shell (1) near the microwave plasma torch (14). The outer shell (1) is also connected to an air outlet pipe (4). A spiral heat exchange tube (5) is fixedly connected to the outer wall of the air outlet pipe (4), and the heat exchange tube (5) is connected to the air inlet pipe (3). An adapter (6) is connected to the end of the heat exchange tube (5) away from the air inlet pipe (3).

2. The microwave treatment device for industrial waste gas according to claim 1, characterized in that, The heat exchange tube (5) is connected to a conical shell (7) at one end near the air inlet pipe (3). The air inlet pipe (3) is connected to the conical shell (7). The conical shell (7) is provided with multiple branch pipes (8) at one end near the air inlet pipe (3), and the branch pipes (8) are connected to the air inlet pipe (3).

3. The microwave treatment device for industrial waste gas according to claim 1, characterized in that, One end of the air intake pipe (3) is fixedly connected to an inclined guide nozzle (9). The guide nozzle (9) is conical and extends through the outer shell (1) and into the outer shell (1).

4. The apparatus for microwave treatment of industrial waste gas according to claim 1, characterized in that, A heat insulation sleeve (10) is fixedly connected to one end of the outer shell (1) away from the gas outlet pipe (4), and the heat insulation sleeve (10) covers the microwave plasma torch (14).

5. The microwave treatment device for industrial waste gas according to claim 1, characterized in that, The outer shell (1) and the air inlet pipe (3) are both integrally formed from ceramic material, and the air inlet pipe (3) and the heat exchange pipe (5) are both flat pipes.

6. The microwave treatment apparatus for industrial waste gas according to claim 4, characterized in that, The heat insulation sleeve (10) is fixedly connected to the heat dissipation shell (11) at the end away from the outer shell (1), and the heat dissipation shell (11) is connected to the water inlet pipe (12) and the water outlet pipe (13) on both sides.

7. The microwave treatment apparatus for industrial waste gas according to claim 6, characterized in that, The heat dissipation shell (11) is an annular shell, and the heat dissipation shell (11) is sleeved on the tail end of the microwave plasma torch (14).

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