Waste gas treatment equipment

Abstract

The utility model provides waste gas treatment equipment which comprises an end cover, and the end cover is provided with a waste gas inlet and an igniter; the reaction kettle is connected to the lower portion of the end cover and comprises multiple stages of reaction cavities, multiple stages of reaction cavities which are stacked in the vertical direction and communicate with the waste gas inlet are defined in the multiple stages of reaction cavities, and each stage of reaction cavity comprises an outer cavity body and an inner cavity body; the upper end part of the inner cavity extends into the outer cavity so as to form an overflow groove between the outer cavity and the inner cavity, each stage of reaction cavity is provided with an air inlet, a water inlet and a waste discharge port which are communicated with the corresponding reaction cavity, the air inlet blows air into the inner cavity, the water inlet and the waste discharge port are both communicated with the overflow groove, and the overflow groove is communicated with the outer cavity. According to the waste gas treatment equipment, waste gas reaction can be more sufficient, the reaction efficiency and the waste removal efficiency are improved, dust deposition and waste discharge are facilitated, and accumulation on the inner wall of the reaction cavity is reduced.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment, and in particular, to a waste gas treatment device. Background Art

[0002] In the production process of the photovoltaic panel industry, a large amount of chemicals and special gases are used, and a large amount of process waste gas containing toxic and harmful gases is continuously generated during the production process. The process waste gas needs to be collected, treated, and discharged synchronously with the production process. The waste gas treatment system and equipment are an integral part of the customer's production process, and their safety and stability are directly related to the customer's production capacity utilization rate, product yield, employee occupational health, and ecological environment. Therefore, electronic waste gas treatment equipment (local scrubber) has been used on the production line to treat the waste gas generated by each process in the production line. The purification of organic waste gas is divided into recovery-type technologies and destruction-type technologies. Recovery-type technologies include absorption, adsorption, condensation, separation, etc.; while destruction-type technologies include combustion, biodegradation, photocatalysis, plasma, ozone, etc.

[0003] The reaction kettle plays an important role in the waste treatment equipment. When the process gas in the previous stage enters the reaction device, the gas mixture undergoes a chemical reaction to generate a high-temperature plasma flame through a heating element in the reaction chamber. Since the gas mixture contains a large amount of dust, silicon carbide particles, hydrogen, etc., a large amount of silicon-based compound crystals and impurities will be generated and accumulated in the reaction chamber, which is not conducive to the process treatment with a large amount of dust. Moreover, the silicon-based compound crystals and impurities in the chamber are easy to form sludge with water, further causing the dust to accumulate and crystallize into blocks and then accumulate, resulting in pipe blockage, thereby reducing the processing efficiency of the equipment. Therefore, the structure is optimized to improve the reliability and stability of the equipment. Summary of the Invention

[0004] The objectives of this application include, for example, providing a waste gas treatment device that can make the waste gas reaction more sufficient, improve the reaction efficiency and waste removal efficiency, and at the same time, is conducive to the deposition and waste discharge of dust, reducing the accumulation on the inner wall of the reaction chamber.

[0005] This application can be implemented as follows:

[0006] The present application provides an exhaust gas treatment device, including an end cap, which is provided with an exhaust gas inlet and an igniter; a reaction kettle, which is connected below the end cap. The reaction kettle includes a multi-stage reaction cavity, and a multi-stage reaction cavity is defined in the multi-stage reaction cavity and is arranged in layers in the up-and-down direction and is communicated with the exhaust gas inlet; each stage of the reaction cavity includes an outer cavity and an inner cavity, and the upper part of the inner cavity extends into the outer cavity to form an overflow groove between the outer cavity and the inner cavity; each stage of the reaction cavity is provided with an air inlet, a water inlet and a waste discharge port communicated with the corresponding reaction cavity. The air inlet blows air into the inner cavity, and both the water inlet and the waste discharge port are communicated with the overflow groove.

[0007] According to the exhaust gas treatment device of the embodiment of the present application, by providing a multi-stage reaction cavity arranged in layers in the up-and-down direction, the exhaust gas can react in the multi-stage reaction cavity. By providing a multi-stage reaction cavity, the overall capacity of the reaction cavity can be increased compared with a single reaction cavity, providing a reaction space for the reaction, so that the reaction is more sufficient, which is beneficial to the process treatment of a large amount of dust.

[0008] Moreover, each stage of the reaction cavity is provided with a corresponding air inlet, so that air can be introduced into each stage of the reaction cavity to promote combustion and purging, thereby increasing the contact space and time between the exhaust gas and the air, making the exhaust gas reaction more sufficient, improving the reaction efficiency. At the same time, an overflow groove is formed in each stage of the reaction cavity, and a water inlet and a waste discharge port communicated with the overflow groove are formed, so that the dust reacted in each stage of the reaction cavity can be dissolved and discharged, preventing the dust from accumulating, crystallizing and then depositing to cause blockage. Moreover, the overflow of water in the overflow groove can also wash the inner walls of the multi-stage reaction cavity, further preventing the inner walls of the reaction cavity from accumulating and causing blockage, and at the same time, it can also achieve the cooling of the reaction kettle, so as to improve the reliability and stability of the exhaust gas treatment device.

[0009] According to some embodiments of the present application, the reaction kettle includes a first reaction cavity body forming a first reaction cavity and a second reaction cavity body forming a second reaction cavity. The first reaction cavity is arranged above the second reaction cavity and is communicated with the exhaust gas inlet. The exhaust gas can react and burn sufficiently in the first reaction cavity and the second reaction cavity, so that the exhaust gas can react more sufficiently and the exhaust gas treatment efficiency can be improved.

[0010] According to some embodiments of the present application, the first reaction chamber includes a first outer chamber and a first inner chamber. The upper part of the first inner chamber extends into the first outer chamber, and a first overflow groove is formed between the first inner chamber and the first outer chamber. The first reaction chamber is provided with a first air inlet, a first water inlet, and a first waste outlet. The first air inlet is provided on the side wall of the first inner chamber, the first water inlet is provided on the side wall of the first outer chamber, and the first waste outlet is provided on the bottom wall of the first outer chamber. The first air inlet is provided on the side wall of the part where the first inner chamber extends out of the first outer chamber and blows air obliquely downward.

[0011] In this way, the waste gas can diffuse in the first outer chamber and react fully, and also enables more of the dust generated after the reaction to fall and dissolve in the first overflow groove, preventing the dust from flowing with the gas and causing blockage of the downstream pipeline. Through the first air inlet, the first inner chamber can be purged to prevent accumulation, and the air volume can also be increased to make the reaction more sufficient. Through the first water inlet and the first waste outlet, side water inlet and bottom waste discharge can be achieved, improving the waste removal efficiency. It can not only play the role of purging the inner wall of the first inner chamber to prevent dust accumulation, but also extend the flame length to make the reaction more sufficient.

[0012] According to some embodiments of the present application, the first inner chamber is formed as a straight pipe, and the first inner chamber is coaxially arranged with the flame outlet of the igniter. This helps to increase the flame length, make the reaction more sufficient, and improve the waste removal efficiency.

[0013] According to some embodiments of the present application, the second reaction chamber includes a second outer chamber and a second inner chamber. The upper part of the second inner chamber extends into the second outer chamber, and a second overflow groove is formed between the second inner chamber and the second outer chamber. The second reaction chamber is provided with a second air inlet, a second water inlet, and a second waste outlet. The second air inlet is provided on the top wall of the second outer chamber to blow air into the second inner chamber, the second water inlet is provided on the side wall of the second outer chamber, and the second waste outlet is provided on the bottom wall of the second outer chamber. Through the second air inlet, the second inner chamber can be purged to prevent accumulation, and the air volume can also be increased to make the reaction more sufficient. Through the second water inlet and the second waste outlet, side water inlet and bottom waste discharge can be achieved, improving the waste removal efficiency.

[0014] According to some embodiments of the present application, in the vertical projection plane, the outlet of the first inner chamber is located inside the inlet of the second inner chamber. This can ensure that the waste gas flows more smoothly from the first inner chamber to the second inner chamber, ensuring the air pressure at the inlet of the second reaction chamber and the flow rate of the waste gas in the second reaction chamber.

[0015] According to some embodiments of the present application, the second inner cavity includes a reaction part and a spraying part. The reaction part is connected above the spraying part and is located within the second outer cavity. The reaction part gradually decreases in the direction from top to bottom. The inverted conical structure can reduce dust adhesion. Moreover, when large dust deposits on the inverted conical structure, it can also slide down along the inner wall, preventing direct impact on the water tank and causing damage.

[0016] According to some embodiments of the present application, the spraying part is provided with a plurality of spraying pipes, at least two of which are oppositely arranged. Each spraying pipe sprays obliquely downward at a first angle with respect to the extending direction of the spraying part, and the first angle is not less than 45 degrees. This can not only wash and cool the spraying part, prevent a large amount of dust from accumulating on its inner wall and forming structures, but also form a water film at the opposite angle of the spraying of the two spraying pipes, which can prevent backflow and further dissolve the waste gas.

[0017] According to some embodiments of the present application, the height of the first overflow tank is less than the height of the second overflow tank. When igniting, it is necessary to ensure that the first overflow tank and the second overflow tank are full of water. The above setting can ensure that the first overflow tank is full of water when the second overflow tank is full of water. Thus, when both overflow tanks are full of water, ignition can be carried out to pyrolyze the incoming waste gas at high temperature and dissolve harmful substances and dust. Moreover, the height of the liquid column in the first reaction cavity is lower than the height of the liquid column in the second reaction cavity, so that the retention space above the first overflow tank in the first reaction cavity is larger, which has a buffering effect on the just-introduced waste gas, can provide sufficient space for ignition and reaction, make the reaction more sufficient, and can also make more dust generated by the reaction dissolve in the second overflow tank, reducing the accumulation of dust on the inner wall of the cavity. At the same time, the retention space above the second overflow tank in the second reaction cavity is reduced to ensure the air pressure and gas flow rate at the inlet of the second reaction cavity and ensure the smooth flow of gas.

[0018] According to some embodiments of the present application, each reaction cavity is provided with a plurality of water inlets distributed circumferentially between the outer cavities, and the water inlets are arranged adjacent to the bottom wall of the outer cavity. This can not only increase the water inlet rate but also inlet water from multiple positions of the overflow tank, which is beneficial to flushing the silt deposited at different positions in the overflow tank, improving the flushing effect and preventing accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of an exhaust gas treatment device according to an embodiment of the present application from one angle;

[0021] Figure 2 It is Figure 1 a cross-sectional view taken along line A-A in

[0022] Figure 3 a schematic structural diagram of an exhaust gas treatment device according to an embodiment of the present application from another angle;

[0023] Figure 4 It is Figure 3 a cross-sectional view taken along line B-B in

[0024] Reference numerals:

[0025] 100: Exhaust gas treatment device;

[0026] 1: End cover, 11: Exhaust gas inlet, 12: Igniter;

[0027] 20: First reaction chamber, 21: First reaction cavity, 22: First outer cavity, 23: First inner cavity, 24: First air inlet, 25: First water inlet, 26: First waste discharge port, 27: First overflow tank;

[0028] 30: Second reaction chamber, 31: Second reaction cavity, 32: Second outer cavity, 33: Second inner cavity, 331: Reaction part, 332: Spraying part, 333: Spraying pipe, 34: Second air inlet, 35: Second water inlet, 36: Second waste discharge port, 37: Second overflow tank;

[0029] 40: Overflow pipe assembly. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0032] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0033] In the description of the present application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the inventive product is customarily placed during use. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0034] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0035] It should be noted that, without conflict, the features in the embodiments of the present application may be combined with each other.

[0036] The exhaust gas treatment device 100 according to an embodiment of the present application will be described below with reference to the drawings.

[0037] Combined Figures 1 - 4 As shown, the exhaust gas treatment device 100 according to an embodiment of the present application may include an end cap 1 and a reaction kettle. The end cap 1 is provided with an exhaust gas inlet 11 and an igniter 12. The reaction kettle is connected below the end cap 1. The reaction kettle includes a multi-stage reaction cavity. A multi-stage reaction cavity is defined in the multi-stage reaction cavity and is stacked in the up and down direction and communicated with the exhaust gas inlet 11.

[0038] Specifically, the end cap 1 is located above the reaction kettle and is hermetically connected to the reaction kettle. The reaction kettle includes a multi-stage reaction cavity. A multi-stage reaction cavity is defined in the multi-stage reaction cavity and is communicated with the exhaust gas inlet 11. Among them, the multi-stage reaction cavity corresponds to the multi-stage reaction cavity one by one. The igniter 12 is used to perform an ignition operation on the combustion of the exhaust gas in the multi-stage reaction cavity. It should be noted that the multi-stage reaction cavity here may include two or more reaction cavities. For example, the multi-stage reaction cavity may include two reaction cavities, three reaction cavities, or four reaction cavities, etc. The exhaust gas flows and burns in the multi-stage reaction cavity. The multi-stage reaction cavity has a large capacity, which is conducive to the full reaction of the exhaust gas and the settlement of reaction dust, so as to improve the exhaust gas treatment effect.

[0039] Such as Figures 1 - 4As shown in the figure, the multi-stage reaction chambers are arranged in sequence in the up-down direction and are connected in series with each other. Among them, the reaction chamber located at the most upstream is connected to the waste gas inlet 11, and the reaction chamber located at the most downstream is connected to the waste gas outlet. In some embodiments of the present application, the multi-stage reaction chambers may include two reaction chambers, namely the first reaction chamber 20 and the second reaction chamber 30. The first reaction chamber 20 is arranged above the second reaction chamber 30 and is respectively connected to the waste gas inlet 11 and the second reaction chamber 30. The waste gas enters the first reaction chamber 20 through the waste gas inlet 11 for reaction and then continues to flow downward to the second reaction chamber 30 for reaction.

[0040] Each stage of reaction chamber body is provided with an air inlet, a water inlet and a waste discharge port that are connected to the corresponding reaction chamber. Each stage of reaction chamber body may include an outer chamber body and an inner chamber body. The upper end portion of the inner chamber body extends into the outer chamber body to form an overflow tank between the outer chamber body and the inner chamber body. Among them, the upper top surface of the inner chamber body is lower than the inner top surface of the outer chamber body. The air inlet is connected to the inner chamber body and blows air towards the inner chamber body. Both the water inlet and the waste discharge port are connected to the overflow tank.

[0041] Specifically, the air inlet is used to introduce gas into the reaction chamber for auxiliary combustion and to achieve the function of air purging. In this way, each stage of reaction chamber can introduce purging gas to promote the combustion reaction and conduct purging to prevent blockage. Moreover, when the waste gas flows through the multi-stage reaction chambers, through multiple air inlets, air components can be increased at different stages of the waste gas flow, making the waste gas reaction more sufficient. At the same time, air purging can also be carried out at different stages to reduce adsorption and accumulation, and further prevent dust blockage.

[0042] The outer chamber body and the inner chamber body of each stage of reaction chamber are both formed as hollow structures, and the upper end portion of the inner chamber extends into the outer chamber body to be spaced apart from the inner wall surface of the outer chamber body to form an overflow tank. In this way, each stage of reaction chamber forms an overflow tank. Both the water inlet and the waste discharge port are connected to the overflow tank. Among them, the upper top surface of the inner chamber body of each stage of reaction chamber is lower than the inner top surface of the outer chamber body. In this way, the inner chamber body and the outer chamber body are connected, and at the same time the overflow tank is connected to the inner chamber body. Moreover, the top walls of the inner chamber body and the outer chamber body are spaced apart, that is, a certain space is spaced apart between the upper end of the inner chamber body and the outer chamber body to provide a reaction space and a diffusion space for the waste gas reaction. This can not only reduce the pressure at the inlet of each stage of reaction chamber, but also this space is connected to the overflow tank. In this way, the dust generated after the reaction of each stage of reaction chamber can fall into the overflow tank. Therefore, each stage of reaction chamber injects water into the overflow tank through the water inlet, and the dust generated by the reaction can fall and dissolve in the overflow tank. The silt-like dust deposited in the overflow tank can be discharged from the waste discharge port, thereby preventing dust accumulation in the reaction chamber and also achieving cooling of the reaction chamber body. The excess water can flow into the inner chamber body and scour the inner wall of the inner chamber body to reduce dust adhesion and blockage phenomena, and at the same time can further achieve cooling.

[0043] Thus, for the waste gas treatment device 100 according to the embodiments of the present application, by providing a multi-stage reaction chamber stacked in the up-and-down direction, the waste gas can react in the multi-stage reaction chamber. By providing a multi-stage reaction chamber, the overall volume of the reaction chamber can be increased compared to a single reaction chamber, providing a reaction space for the reaction, so that the reaction is more complete, which is beneficial to the process treatment with a large dust amount.

[0044] Moreover, each stage of the reaction chamber is provided with a corresponding air inlet, so that air can be introduced into each stage of the reaction chamber to promote combustion and purging. Thus, the contact space and time between the waste gas and air can be increased, making the waste gas reaction more complete, improving the reaction efficiency. At the same time, each stage of the reaction chamber is formed with an overflow tank, and a water inlet and a waste outlet communicating with the overflow tank. Thus, the dust reacted in each stage of the reaction chamber can be dissolved and discharged, preventing the dust from accumulating, crystallizing and then depositing to cause blockage. Moreover, the overflow of water in the overflow tank can also scour the inner wall of the multi-stage reaction chamber, further preventing blockage caused by the accumulation on the inner wall of the reaction chamber. At the same time, it can also cool down the reaction kettle, so as to improve the reliability and stability of the waste gas treatment device 100.

[0045] In some embodiments of the present application, the multi-stage reaction chamber can be two stages. The reaction kettle can include a first reaction cavity body 21 forming a first reaction chamber 20 and a second reaction cavity body 31 forming a second reaction chamber 30. As Figure 1 shown, the first reaction chamber 20 is arranged above the second reaction chamber 30 and communicated with the waste gas inlet 11. The first reaction chamber 20 is also communicated with the second reaction chamber 30. And in the flow direction of the waste gas, the first reaction chamber 20 is located upstream of the second reaction chamber 30. The waste gas can fully react and burn in the first reaction chamber 20 and the second reaction chamber 30, so that the waste gas can react more completely and improve the waste gas treatment efficiency.

[0046] Combined with Figures 1 - 4 shown, the first reaction cavity body 21 includes a first outer cavity body 22 and a first inner cavity body 23. The upper end portion of the first inner cavity body 23 extends into the first outer cavity body 22 and forms a first overflow tank 27 with the first outer cavity body 22. The first reaction cavity body 21 is provided with a first air inlet 24, a first water inlet 25 and a first waste outlet 26. The first air inlet 24 is arranged on the side wall of the first inner cavity body 23, the first water inlet 25 is arranged on the side wall of the first outer cavity body 22, and the first waste outlet 26 is arranged on the bottom wall of the first outer cavity body 22.

[0047] Specifically, both the first outer cavity 22 and the first inner cavity 23 are formed as hollow structures. The upper end of the first outer cavity 22 is open and is hermetically connected to the end cover 1. The bottom of the first outer cavity 22 has a bottom wall and is formed with a through hole suitable for the upper end of the first inner cavity 23 to pass through. Both the upper and lower ends of the first inner cavity 23 are open, and the upper end portion of the first inner cavity 23 extends into the first outer cavity 22. The topmost surface of the first inner cavity 23 is lower than the inner top surface of the first outer cavity 22. Further, the first inner cavity 23 slightly protrudes from the bottom wall of the first outer cavity 22, that is, the height of the portion of the first inner cavity 23 located within the first outer cavity 22 is relatively small compared to the overall height of the first outer cavity 22. The liquid column in the first overflow groove 27 is relatively low, and the remaining space above the first overflow groove 27 is relatively large. In this way, it has a buffering effect on the freshly introduced waste gas, and can also provide sufficient space for heating the igniter 12, such as a torch, so that the waste gas can diffuse in the first outer cavity 22 and react sufficiently, and can also make the dust generated after the reaction fall more and dissolve in the first overflow groove 27, preventing the dust from flowing with the gas and causing blockage of the downstream pipeline.

[0048] In the example as Figure 2 and Figure 4 shown, both the first outer cavity 22 and the first inner cavity 23 are formed as cylindrical shapes. The diameter of the first outer cavity 22 is larger than the diameter of the first inner cavity 23. Thus, on the one hand, the first inner cavity 23 can extend into the first outer cavity 22 from the bottom wall of the first outer cavity 22, and on the other hand, it can increase the space of the first outer cavity 22, enabling the waste gas to react sufficiently when it first enters the cavity of the first outer cavity 22, and can also reduce the pressure at the waste gas inlet 11. Further, the height by which the first inner cavity 23 protrudes from the bottom wall of the first outer cavity 22 may not be greater than one-half of the total height of the first outer cavity 22. Thus, when the waste gas enters the first outer cavity 22 from the waste gas inlet 11, sufficient reaction space can be provided, enabling the waste gas to diffuse in the first outer cavity 22 and react sufficiently, rather than directly entering the first inner cavity 23, and also enabling more dust to fall into the first overflow groove 27 to further improve the reaction effect and prevent dust accumulation.

[0049] As Figure 1 、 Figure 3 and Figure 4As shown, the first air inlet 24 is provided on a partial side wall of the first inner cavity 23 outside the first outer cavity 22. The first air inlet 24 is arranged to incline downward. On the one hand, it is convenient for the connection and assembly of the first air inlet 24; on the other hand, the first air inlet 24 being provided at the lower part of the first reaction chamber 20 can also extend the reaction time, making the reaction more sufficient. Moreover, the first air inlet blows air downward obliquely, which can not only blow the inner wall of the first inner cavity 23 to prevent dust accumulation, but also extend the flame length, making the reaction more sufficient. Further, the first air inlet 24 can be arranged adjacent to the second reaction chamber 30, so as to also blow the upper opening of the second reaction chamber 30.

[0050] In some examples, the first inner cavity 23 is formed as a straight pipe, and the first inner cavity 23 is coaxially arranged with the flame outlet of the igniter 12, so that the axial direction of the first inner cavity 23 can be the same as the flame direction of the igniter 12, which helps to increase the flame length, make the reaction more sufficient, and improve the waste removal efficiency.

[0051] According to some embodiments of the present application, the second reaction cavity 31 includes a second outer cavity 32 and a second inner cavity 33. The upper end portion of the second inner cavity 33 extends into the second outer cavity 32 and forms a second overflow groove 37 with the second outer cavity 32. The cavity of the second reaction chamber 30 is provided with a second air inlet 34, a second water inlet 35 and a second waste outlet 36.

[0052] Specifically, the second reaction chamber 30 is located below the first reaction chamber 20. Both the second outer cavity 32 and the second inner cavity 33 are formed as hollow structures. The first inner cavity 23 is connected to the second outer cavity 32. The inlet of the second inner cavity 33 corresponds to the outlet of the first inner cavity 23 up and down. The topmost surface of the second inner cavity 33 is lower than the inner top surface of the second outer cavity 32 and is spaced from the top wall of the second outer cavity 32. The second overflow groove 37 is communicated with the second inner cavity 33. The dust generated by the reaction of the waste gas in the second reaction chamber 30 can fall and dissolve into the second overflow groove 37. Both the second water inlet 35 and the second waste outlet 36 are communicated with the second overflow groove 37. Water can be injected into the second overflow groove 37 through the second water inlet 35. The dust dissolves in the second overflow groove 37 and is discharged through the second waste outlet 36, so as to realize the treatment of the dust and prevent dust accumulation. Moreover, after the second overflow groove 37 is filled with water, it can flow along the side wall of the second inner cavity 33 into the second inner cavity 33 to wash the inner wall surface of the second inner cavity 33, so as to reduce the accumulation of dust on the inner wall surface of the second inner cavity 33, and at the same time, it can also realize the cooling of the second reaction cavity 31.

[0053] The second water inlet 35 is provided on the side wall of the second outer cavity 32, and the second waste outlet 36 is provided on the bottom wall of the second outer cavity 32. Thus, water can enter from the side and be drained from the bottom, which helps to carry away the silt-like dust and prevent accumulation. The second air inlet 34 is provided on the top wall of the second outer cavity 32 and blows air into the second inner cavity 33. This not only increases the air volume but also helps to assist the combustion reaction, making the reaction more complete. It also purges the inlet of the second outer cavity 32 to reduce dust adhesion and accumulation.

[0054] According to some embodiments of the present application, the inlet area of the second inner cavity 33 is larger than the outlet area of the first inner cavity 23. The inlet of the second inner cavity 33 corresponds to the outlet of the first inner cavity 23, and in the vertical projection plane, the outlet of the first inner cavity 23 is located inside the inlet of the second inner cavity 33. This can ensure that the exhaust gas flows more smoothly from the first inner cavity 23 to the second inner cavity 33, and ensure the air pressure at the inlet of the second reaction chamber 30 and the flow rate of the exhaust gas in the second reaction chamber 30.

[0055] According to some embodiments of the present application, the second inner cavity 33 includes a reaction part 331 and a spraying part 332. The reaction part 331 is connected above the spraying part 332 and is located inside the second outer cavity 32. The exhaust gas flows from the reaction part 331 to the spraying part 332. The diameter of the reaction part 331 gradually decreases in the direction from top to bottom, that is, the tube wall of the reaction part 331 extends obliquely towards the central axis in the direction from top to bottom. In some specific examples, the reaction part 331 is in an inverted cone shape, which can reduce dust adhesion. Moreover, when large dust deposits on the inverted cone structure, it can also slide down along the inner wall, preventing direct impact on the water tank and causing damage. Among them, the second air inlet 34 is formed on the top wall of the second outer cavity 32 and can purge the inner wall surface of the reaction part 331, that is, the top of the second reaction chamber 30 can be purged with air through the second air inlet 34, so as to purge the smaller-airflow end of the inverted-cone-shaped reaction part 331 and further prevent dust accumulation.

[0056] According to some embodiments of the present application, the spraying part 332 is provided with a plurality of spraying pipes 333, which can be used to wash the inner wall of the spraying part 332 and can also cool it. Specifically, the spraying part 332 can be formed as a straight pipe. The straight pipe length of the second reaction chamber 30 is generally designed to be relatively long, and dust adheres to its inner wall and large-scale scaling is formed. Spraying the spraying part 332 through the spraying pipes 333 can further prevent blockage. At least two of the spraying pipes 333 are arranged oppositely and each spraying pipe 333 sprays obliquely downward at a first angle with respect to the extending direction of the spraying part 332. The first angle is not less than 45 degrees. For example, the first angle can be 45 degrees, 60 degrees, etc. In this way, the spraying pipes 333 are arranged oppositely and spray downward, which can not only wash the pipe wall, but also form a water film at the opposite included angle of the spraying of the two spraying pipes 333, preventing backflow and further dissolving the waste gas.

[0057] According to some embodiments of the present application, the height of the first overflow tank 27 is less than the height of the second overflow tank 37, which can ensure that the first overflow tank 27 is full of water when the second overflow tank 37 is full of water. Thus, when both overflow tanks are full of water, ignition can be carried out to pyrolyze the incoming waste gas at high temperature and dissolve harmful substances and dust. Moreover, the height of the liquid column in the first reaction chamber 20 is lower than the height of the liquid column in the second reaction chamber 30, so that the remaining space above the first overflow tank 27 in the first reaction chamber 20 is relatively large, which has a buffering effect on the just-introduced waste gas, can provide sufficient space for ignition and reaction, making the reaction more sufficient, and can also make more dust generated just after the reaction dissolve in the second overflow tank 37, reducing the accumulation of dust on the inner wall of the cavity. At the same time, the remaining space above the second overflow tank 37 in the second reaction chamber 30 is reduced to ensure the air pressure and gas flow rate at the inlet of the second reaction chamber 30 and ensure the smooth flow of gas.

[0058] Specifically, the first overflow tank 27 and the second overflow tank 37 can be filled with water at the same time. Due to the limitation of the heights of the first overflow tank 27 and the second overflow tank 37, the water storage time of the first overflow tank 27 and the second overflow tank 37 can be limited, so that both of them can be filled with water at the same time, ensuring that the first overflow tank 27 is full of water when the second overflow tank 37 is full of water, and thus ignition is carried out when the first overflow tank 27 and the second overflow tank 37 are full of water. It should be noted that for the heights of the first overflow tank 27 and the second overflow tank 37, the heights of the first overflow tank 27 and the second overflow tank 37 may not be limited, as long as it is ensured that both overflow tanks are full of water during water storage. For example, when the heights of the two overflow tanks are the same or the height of the second overflow tank 37 is less than that of the second overflow tank 37, the water storage time of the two overflow tanks can be calculated to determine that both are full of water, and then the ignition operation is carried out, or the liquid levels of the two overflow tanks are calculated to ensure that both are full of water.

[0059] According to some embodiments of the present application, the water inlet is disposed adjacent to the bottom wall of the outer cavity and is plural. The plural water inlets are circumferentially spaced apart along the outer cavity. By providing the plural water inlets, not only can the water inlet rate be increased, but also water can enter from multiple positions of the overflow tank, which is beneficial to scouring the silt deposited at different positions in the overflow tank, improving the scouring effect and preventing accumulation. Further, the plural water inlets may be evenly spaced apart circumferentially along each stage of the outer cavity.

[0060] According to some embodiments of the present application, the waste gas treatment device 100 further includes an overflow pipe assembly 40. The overflow pipe assembly 40 is connected downstream of the reaction kettle through a flange and a clamp, which is convenient for replacement and disassembly.

[0061] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An exhaust gas treatment device (100), characterized in that, Including: An end cap (1) provided with an exhaust gas inlet (11) and an igniter (12); a reaction kettle connected below the end cap (1), the reaction kettle including a multi-stage reaction cavity, and a multi-stage reaction cavity defined in the multi-stage reaction cavity and arranged in layers in the vertical direction and communicating with the exhaust gas inlet (11); each stage of the reaction cavity includes an outer cavity and an inner cavity, and an upper part of the inner cavity extends into the outer cavity to form an overflow tank between the outer cavity and the inner cavity; each stage of the reaction cavity is provided with an air inlet, a water inlet and a waste outlet communicating with the corresponding reaction cavity, the air inlet blows air into the inner cavity, and both the water inlet and the waste outlet communicate with the overflow tank.

2. The exhaust gas treatment device (100) according to claim 1, characterized in that, The reaction kettle includes a first reaction cavity (21) forming a first reaction chamber (20) and a second reaction cavity (31) forming a second reaction chamber (30), the first reaction chamber (20) is arranged above the second reaction chamber (30) and communicates with the exhaust gas inlet (11).

3. The exhaust gas treatment device (100) according to claim 2, characterized in that, The first reaction cavity (21) includes a first outer cavity (22) and a first inner cavity (23), an upper part of the first inner cavity (23) extends into the first outer cavity (22) and forms a first overflow tank (27) between the first outer cavity (22); the first reaction cavity (21) is provided with a first air inlet (24), a first water inlet (25) and a first waste outlet (26), the first air inlet (24) is arranged on the side wall of the first inner cavity (23), the first water inlet (25) is arranged on the side wall of the first outer cavity (22), the first waste outlet (26) is arranged on the bottom wall of the first outer cavity (22), and the first air inlet (24) is arranged on the side wall of the first inner cavity (23) extending out of the first outer cavity (22) and blows air obliquely downward.

4. The exhaust gas treatment device (100) according to claim 3, characterized in that The first inner cavity (23) is formed as a straight pipe, and the first inner cavity (23) is coaxially arranged with the flame outlet of the igniter (12).

5. The exhaust gas treatment device (100) according to claim 3, characterized in that, The second reaction cavity (31) includes a second outer cavity (32) and a second inner cavity (33), an upper part of the second inner cavity (33) extends into the second outer cavity (32) and forms a second overflow tank (37) between the second outer cavity (32); the second reaction cavity (31) is provided with a second air inlet (34), a second water inlet (35) and a second waste outlet (36), the second air inlet (34) is arranged on the top wall of the second outer cavity (32) to blow air into the second inner cavity (33), the second water inlet (35) is arranged on the side wall of the second outer cavity (32), and the second waste outlet (36) is arranged on the bottom wall of the second outer cavity (32).

6. The exhaust gas treatment device (100) according to claim 5, characterized in that, In the vertical projection plane, the outlet of the first inner cavity (23) is located inside the inlet of the second inner cavity (33).

7. The exhaust gas treatment device (100) according to claim 5, characterized in that, The second inner cavity body (33) includes a reaction part (331) and a spraying part (332). The reaction part (331) is connected above the spraying part (332) and is located within the second outer cavity body (32). The diameter of the reaction part (331) gradually decreases in the direction from top to bottom.

8. The exhaust gas treatment device (100) according to claim 7, characterized in that, The spraying part (332) is provided with a plurality of spraying pipes (333), and at least two of the spraying pipes (333) are arranged oppositely. Each spraying pipe (333) sprays downward at a first angle with respect to the extending direction of the spraying part (332), and the first angle is not less than 45 degrees.

9. The exhaust gas treatment device (100) according to claim 5, characterized in that, The height of the first overflow tank (27) is less than the height of the second overflow tank (37).

10. The exhaust gas treatment device (100) according to claim 1, characterized in that, Each reaction cavity is provided with a plurality of the water inlets that are circumferentially spaced apart along the corresponding outer cavity, and the water inlets are arranged adjacent to the bottom wall of the outer cavity.

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