Exhaust gas combustion structure of exhaust gas treatment device

Abstract

The utility model belongs to waste gas treatment technical field especially relates to a waste gas combustion structure of waste gas treatment equipment, include: combustion chamber, be provided with gas inflow pipe, combustion supply pipe and air supply pipe on the combustion chamber, the bottom of combustion chamber is provided with exhaust pipe, cooling chamber, cooling chamber sets up below the inlet of combustion chamber top end cooling chamber and is communicated with the combustion chamber through exhaust pipe, cooling chamber still includes: gas flow path, gas flow path sets up in cooling chamber, gas flow path first extends downward from the inlet of cooling chamber top end again presents right angle bending and then extends to the export of cooling chamber horizontally, cooling water spray head, cooling water spray head sets up on the lateral wall of cooling chamber, among them, the height position of cooling water spray head is located on the horizontal center surface of gas flow path horizontal extension part, and the output end of cooling water spray head horizontally faces the horizontal extension part of gas flow path, relative to prior art, the utility information has improved the operation stability of waste gas treatment equipment, has guaranteed the treatment effect of waste gas.

Description

Technical Field

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

[0002] In the resin production industry, waste gas treatment is an important part of the production process. If the waste gas is directly emitted, it will pollute the atmospheric environment and may harm human health. Therefore, it needs to be treated harmlessly through a special fluid treatment device.

[0003] In existing technologies, waste gas treatment equipment that utilizes combustion typically includes a waste gas combustion structure: the waste gas containing halogens is burned at high temperatures (such as above 800°C), causing the halogens to decompose into products such as carbon dioxide, hydrogen fluoride, and hydrogen chloride; then, the high-temperature fluid after combustion is rapidly cooled to below 300°C by spraying cooling water (below this temperature can effectively inhibit the formation of dioxins and other harmful substances); and then the cooled fluid is transported to subsequent washing and other processes to complete the final treatment.

[0004] However, the cooling section of traditional combustion-based waste gas treatment devices has significant design flaws: to ensure sufficient contact between the cooling water and the high-temperature fluid in the flow path, the cooling water jet section typically extends the cooling water flow pipe to the center of the flow path's cross-section, with atomizing nozzles installed at the end of the pipe. However, the hydrogen fluoride, hydrogen chloride, and other halides produced after combustion are highly corrosive. Direct contact with the cooling water flow pipe and nozzles located in the center of the flow path easily leads to corrosion damage to these components. Frequent corrosion not only necessitates periodic replacement of the jet section components, increasing equipment maintenance costs and downtime, but also can lead to reduced cooling efficiency due to jet damage. This can result in problems such as the high-temperature fluid failing to cool down to below 300°C in a timely manner and excessive dioxin formation, severely impacting the stable operation and treatment effectiveness of the device. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing a waste gas combustion structure for a waste gas treatment device, so as to effectively improve the operational stability and waste gas treatment effect of the waste gas treatment device.

[0006] In view of this, the present invention provides a waste gas combustion structure for a waste gas treatment device, comprising: A combustion chamber, wherein a gas inlet pipe, a combustion supply pipe and an air supply pipe are provided on the combustion chamber, and an exhaust pipe is provided at the bottom of the combustion chamber; A cooling chamber is located below the combustion chamber, and its inlet at the top of the cooling chamber is connected to the combustion chamber via an exhaust pipe. The cooling chamber also includes: A gas flow path is provided in the cooling chamber. The gas flow path extends downward from the inlet at the top of the cooling chamber, then bends at a right angle and extends horizontally to the outlet of the cooling chamber. Cooling water nozzles are installed on the side wall of the cooling chamber; The cooling water nozzle is positioned at the horizontal center plane of the horizontal extension of the gas flow path, and the output end of the cooling water nozzle is horizontally oriented towards the horizontal extension of the gas flow path.

[0007] In this technical solution, the fluorine-containing waste gas generated during resin production enters the combustion chamber through a gas inlet pipe. Simultaneously, natural gas is supplied through a combustion supply pipe, and combustion air is supplied through an air supply pipe. After mixing in the combustion chamber, the mixture is ignited by an ignition device, maintaining a combustion temperature of 850℃. The fluorine-containing waste gas decomposes into products such as hydrogen fluoride and carbon dioxide at high temperatures. The high-temperature fluid after combustion enters the gas flow path of the cooling chamber through an exhaust pipe, initially flowing downwards along a vertical section. The high-temperature fluid then bends at a right angle and enters a horizontal flow path. Cooling water nozzles are activated, and a variable frequency water pump delivers cooling water to the nozzles. The atomized cooling water mixes with the fluid in a horizontal direction, completing heat exchange within the horizontal flow path, rapidly reducing the fluid temperature to below 260℃. The cooled fluid is discharged from the cooling chamber outlet and enters a subsequent scrubbing tower for deep defluorination treatment. The cooling water nozzles are installed on the side wall of the cooling chamber, with their height coinciding with the center plane of the horizontal flow path. This avoids direct contact with the halogen-containing fluid in the center of the flow path, reducing corrosion of the cooling water nozzles, improving the operational stability of the waste gas treatment equipment, and ensuring the treatment effect of the waste gas.

[0008] Furthermore, the above technical solution also includes: A protective liquid layer generating pipe is provided on the inner wall of the upstream side of the gas flow path. The protective liquid layer generating pipe extends and is distributed along the circumferential direction of the gas flow path. A protective liquid outlet is provided at the lower part of the protective liquid layer generating pipe. The cooling chamber has an input pipe on its outer wall for supplying protective liquid to the protective liquid layer generation pipe, and a protective liquid outlet for outputting protective liquid to the inner wall on the upstream side of the gas flow path to form a protective liquid layer.

[0009] Furthermore, the above technical solution also includes: A protective gas layer generating pipe is disposed on the inner wall of the upstream side of the gas flow path and located above the protective liquid layer generating pipe. The protective gas generating pipe extends and is distributed along the circumferential direction of the gas flow path. A protective gas flow outlet is provided at the lower part of the protective gas layer generating pipe. The cooling chamber has an input pipe on its outer wall for supplying protective gas to the protective gas layer generating pipe. The protective gas flow outlet is located inside the protective liquid flow outlet. The protective gas flow outlet is used to output protective gas to the surface of the protective liquid layer and form a protective gas layer on the surface of the protective liquid layer.

[0010] In the above technical solution, the cooling water nozzle further includes: The nozzle body has a filter chamber and an output channel communicating with the filter chamber. One end of the nozzle body has an output port communicating with the output channel, and the other end is a closed end. A filter screen, which is disposed in a filter chamber for filtering cooling water; A cooling water inlet pipe is provided on one side of the nozzle body and communicates with the filter chamber on the upstream side of the filter screen.

[0011] Furthermore, the above technical solution also includes: A backflush chamber is disposed in the nozzle body and is circumferentially distributed around the output flow channel; A backwash water inlet pipe is provided on the nozzle body and communicates with the backwash chamber. A backwash water spray outlet is provided on the upstream side of the output flow channel and communicates with the backwash chamber, and the backwash water spray outlet faces the filter screen. The discharge pipe is installed on the nozzle body to discharge impurities that separate from the filter screen during backwashing. The backflush water spray outlet has several outlets that are evenly spaced along the circumference of the backflush chamber.

[0012] The beneficial effects of this utility model are: 1. Solving the corrosion problem of cooling components: The cooling water nozzles are installed on the side wall of the cooling chamber, and their height coincides with the center plane of the horizontal flow path. This avoids direct insertion into the center of the flow path and contact with halogen-containing fluids, effectively extending the service life of the nozzles, significantly reducing maintenance costs, and improving the operational stability of the exhaust gas treatment equipment, thus ensuring the treatment effect of the exhaust gas. 2. Ensure protection of the inner wall of the gas flow path: The combined design of the protective liquid layer and the protective gas layer can form a "liquid-gas" double protective barrier on the inner wall of the upstream side of the flow path, which effectively reduces the corrosion rate of the inner wall of the flow path and ensures the structural strength of the flow path for long-term use; 3. Prevent cooling water nozzle clogging: The combination of the filter and backwash cleaning components can effectively filter impurities and achieve online self-cleaning, reducing nozzle clogging rate and minimizing downtime for maintenance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0015] Figure 2 This is a schematic cross-sectional view of the present invention.

[0016] Figure 3 This is a schematic diagram of the upstream structure of the gas flow path of this utility model.

[0017] Figure 4 This is a schematic diagram of the cooling water nozzle structure of this utility model.

[0018] Figure 5 This is a schematic cross-sectional view of the cooling water nozzle of this utility model.

[0019] The markings in the diagram are as follows: 1. Combustion chamber; 2. Exhaust pipe; 3. Cooling chamber; 4. Gas flow path; 5. Cooling water nozzle; 50. Nozzle body; 51. Filter chamber; 52. Output channel; 53. Output port; 54. Filter screen; 55. Cooling water inlet pipe; 56. Backflush chamber; 57. Backflush water inlet pipe; 58. Backflush water outlet; 59. Discharge pipe; 6. Protective liquid layer generation pipe; 7. Protective liquid outlet; 8. Protective gas layer generation pipe; 9. Protective gas flow outlet. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0022] This exhaust gas combustion structure mainly consists of a combustion chamber 1 and a cooling chamber 3, which are fluidly connected through an exhaust pipe 2, forming an integrated "combustion-cooling" process. Specifically: Combustion chamber 1 Combustion chamber 1 has a vertical cylindrical structure and is made of heat-resistant stainless steel (such as 310S), capable of withstanding temperatures above 900℃. The top and side walls of combustion chamber 1 are welded with a gas inlet pipe, a combustion supply pipe, and an air supply pipe. The gas inlet pipe, with a diameter of 80-120mm, introduces halogenated waste gas from resin production into combustion chamber 1. Its inlet is equipped with a flow regulating valve to adjust the intake volume according to the waste gas concentration. The combustion supply pipe, with a diameter of 50-80mm, transports fuels such as natural gas or propane. It is equipped with a gas solenoid valve and a pressure sensor to ensure a stable fuel supply. The air supply pipe, with a diameter of 100-150mm, transports combustion air and is connected to a Roots blower (10-20m³ / h). 3 / h), ensuring sufficient oxygen for combustion. An exhaust pipe 2 (120-150mm in diameter) is welded to the center of the bottom of the combustion chamber 1. The inner wall of the exhaust pipe 2 is coated with a high-temperature resistant and corrosion-resistant coating (such as an alumina ceramic coating) to prevent the high-temperature fluid from corroding the pipe after combustion. The exhaust pipe 2 is sealed to the inlet at the top of the cooling chamber 3 through a flange to ensure no fluid leakage.

[0023] Cooling Chamber 3 The cooling chamber 3 has a rectangular box-like structure (1500-2000mm long, 800-1000mm wide, and 1000-1200mm high), welded from Q345R steel plates, and its outer wall is wrapped with 50mm thick insulation cotton (made of aluminum silicate fiber) to reduce heat loss during the cooling process. The cooling chamber 3 is equipped with a gas flow path 4 and cooling water nozzles 5.

[0024] Gas flow path 4 Gas flow path 4 is a cylindrical channel (diameter the same as exhaust pipe 2, 120-150mm) matched with exhaust pipe 2, made of Hastelloy C276 material (this material has excellent resistance to hydrogen chloride and hydrogen fluoride corrosion, meeting the requirements for corrosion-resistant components in patent JP2025101852A). The gas flow path 4 is designed with a "segmented bending structure": starting from the inlet at the top of cooling chamber 3, it extends vertically downwards for 300-400mm (this segment is the upstream side of gas flow path 4), then transitions through a 90° right-angle bend, and then extends horizontally for 800-1000mm (this segment is the downstream side of gas flow path 4), finally connecting to the outlet (diameter 120-150mm) on the side wall of cooling chamber 3. The outlet end is used to connect to the subsequent scrubbing tower equipment. The purpose of this bending structure is to change the flow direction of the high-temperature fluid at the bend, forming a brief "stagnant zone," providing more sufficient contact time for subsequent cooling water injection.

[0025] Cooling water nozzle 5 The cooling water nozzle 5 uses a corrosion-resistant atomizing nozzle (also made of Hastelloy C276), with a nozzle orifice diameter of 2-3mm and a spray angle of 60-90°. It can atomize the cooling water into droplets of 50-100μm, increasing the contact area with high-temperature fluids. The cooling water nozzle 5 is fixed to the side wall of the cooling chamber 3 via a threaded connection. Its installation position must meet two key conditions: First, its height must coincide with the horizontal center plane of the horizontal extension of the gas flow path 4—that is, the spray center axis of the nozzle and the center axis of the horizontal flow path are on the same horizontal plane. This design ensures that the atomized cooling water is evenly distributed in the upper and lower halves of the horizontal flow path, avoiding the problems of "insufficient cooling in the upper half" or "water accumulation in the lower half" caused by height deviations in traditional nozzles. Second, the nozzle output end must be horizontally oriented towards the horizontal extension of the gas flow path 4, and the distance between the nozzle and the bend in the gas flow path 4 must be 50-80mm. This distance allows the cooling water to precisely cover the beginning of the horizontal flow path after spraying. As the fluid flows horizontally, the cooling water and fluid mix thoroughly, achieving rapid cooling. The inlet of the cooling water nozzle 5 is connected to the cooling water tank via a pipe. A variable frequency water pump (flow rate 5-10L / h, pressure 0.3-0.5MPa) is installed on the pipe, which can adjust the water supply according to the fluid temperature.

[0026] The nozzle body 50 of the cooling water nozzle 5 is a cylindrical structure (80-100mm in length, 30-40mm in diameter). An internal filter chamber 51 and an output channel 52 are formed along the axial direction. The filter chamber 51, located in the middle of the nozzle body 50, has a volume of 100-150ml and is used to install a filter screen 54. The output channel 52 is located downstream of the filter chamber 51 (near the nozzle output port 53), with a diameter of 5-8mm. Its end connects to the nozzle output port 53 (2-3mm in diameter), used to deliver the filtered cooling water to the output port 53 and atomize it. One end of the nozzle body 50 is a closed end (sealed with a threaded plug for easy disassembly and maintenance), and the other end is the output port 53. An atomizing core (made of sapphire to ensure stable atomization) is located at the output port 53.

[0027] The filter screen 54 is made of 100-120 mesh corrosion-resistant stainless steel (material 316L). The outer diameter of the filter screen 54 matches the inner diameter of the filter chamber 51 (25-35mm), and it can be fixed in the filter chamber 51 by a snap-fit ​​structure for easy periodic replacement. The function of the filter screen 54 is to filter particulate impurities in the cooling water (such as pipe rust, silt in the water source, etc.), preventing impurities from entering the output channel 52 or clogging the output port 53, thus ensuring that the atomization effect is not affected.

[0028] A cooling water inlet pipe 55 (diameter 15-20mm) is welded to one side of the nozzle body 50. The inlet pipe is connected to the filter chamber 51 upstream of the filter screen 54. After the cooling water enters the filter chamber 51 from the inlet pipe, it is first filtered by the filter screen 54, then enters the output channel 52, and finally atomizes and sprays out from the output port 53, forming a complete process of "filtration-transportation-atomization".

[0029] The backflush chamber 56 is an annular cavity (10-15mm wide and 20-25mm high) surrounding the output channel 52. It is located inside the nozzle body 50 and at the connection between the filter chamber 51 and the output channel 52. Its function is to store the backflush medium (in this structure, high-pressure cooling water that has undergone external filtration is used as the backflush medium).

[0030] A backwash water inlet pipe 57 (10-15mm in diameter) is welded to the side wall of the nozzle body 50. This inlet pipe is connected to the backwash chamber 56. A solenoid valve and a pressure pump (0.7-0.9MPa) are installed on the pipe to control the flow and pressure of the backwash water. Six to eight backwash water nozzles 58 are evenly distributed circumferentially on the side of the backwash chamber 56 near the filter screen 54. Each nozzle has a diameter of 1-2mm, and the axis of the nozzle forms a 45° angle with the surface of the filter screen 54, ensuring that the backwash water impacts the surface of the filter screen 54 perpendicularly after being sprayed, thus improving the impurity removal effect.

[0031] A discharge pipe 59 (12-18mm in diameter) is welded to the bottom of the nozzle body 50. This discharge pipe 59 is connected to the filter chamber 51 upstream of the filter screen 54. A solenoid valve is also installed on the pipe to discharge impurities and wastewater stripped during the backwashing process. The working logic of the backwashing cleaning component is as follows: the backwashing cycle is set by the controller (usually 24 hours / time). During each backwash, the valve of the cooling water inlet pipe 55 is closed first, and then the solenoid valve of the backwash water inlet pipe 57 is opened. High-pressure water is sprayed from the nozzle outlet to the filter screen 54 to remove the impurities attached to the filter screen 54. Then the solenoid valve of the discharge pipe 59 is opened, and the impurities and wastewater are discharged through the discharge pipe 59 to the wastewater collection tank. After the backwash is completed (usually lasting 30-60 seconds), the valves of the backwash water and the discharge pipe 59 are closed, and the cooling water inlet pipe 55 is reopened to restore the normal operation of the nozzle.

[0032] Protective liquid layer generation pipe 6 The protective liquid layer generating pipe 6 is an annular structure made of Hastelloy C276 material. It can be fixed to the inner wall of the upstream side of the gas flow path 4 by welding. The installation position is located at the upper part of the vertical extension section (100-150mm away from the top inlet of the cooling chamber 3). The inside of the protective liquid layer generating pipe 6 is equipped with a protective liquid retention chamber—this retention chamber is an annular cavity (volume 500-800ml) extending circumferentially along the pipe body. Its function is to temporarily store the protective liquid and ensure that the protective liquid can be evenly distributed throughout the pipe body.

[0033] A protective liquid outlet 7 is circumferentially opened at the lower part of the protective liquid layer generating pipe 6. The width of the outlet is 4-6 mm, ensuring that the protective liquid can flow continuously from the outlet and form a continuous liquid layer without any breaks along the inner wall of the gas flow path 4. A protective liquid inlet pipe (diameter 20-30 mm) is welded to the outer wall of the cooling chamber 3. One end of the inlet pipe extends into the cooling chamber 3 and communicates with the protective liquid retention chamber, while the other end is connected to the protective liquid storage tank through a pipeline. A metering pump (flow rate 8-12 L / h, pressure 0.2-0.3 MPa) is installed on the pipeline to stably deliver the protective liquid to the retention chamber.

[0034] The protective liquid selected in this structure is an alkaline liquid (such as 5%-8% sodium hydroxide solution or 3%-5% sodium carbonate solution). Its function is as follows: on the one hand, the alkaline liquid can neutralize the hydrogen fluoride and hydrogen chloride in the fluid after combustion, reducing the corrosion of the inner wall by corrosive substances; on the other hand, the protective liquid flowing along the inner wall can form a liquid film with a thickness of 2-3 mm, physically isolating the high-temperature fluid from the inner wall of the flow path, avoiding corrosion caused by direct contact.

[0035] Protective gas layer generation pipe 8 The protective gas layer generating pipe 8 is also a ring structure, made of Hastelloy C276, and is fixed to the inner wall of the upstream side of the gas flow path 4 by welding. The installation position is located directly above the protective liquid layer generating pipe 6, ensuring that the protective gas can directly act on the surface of the protective liquid layer.

[0036] The protective gas layer generating pipe 8 has an annular protective gas chamber (volume 300-500ml) inside. A protective gas outlet 9 is opened circumferentially at the lower part of the pipe body. The width of the outlet is 2-3mm, and the outlet is located inside the protective liquid outlet 7 (i.e., the outlet is closer to the central axis of the gas flow path 4). The purpose of this inner arrangement is to form an annular gas curtain on the inner surface of the protective liquid layer (closer to the fluid side) after the protective gas is ejected from the outlet, thus preventing the airflow from directly impacting the liquid layer and causing the liquid film to rupture.

[0037] A protective gas inlet pipe (15-25mm in diameter) is welded to the outer wall of cooling chamber 3. One end is connected to the protective gas chamber, and the other end is connected to a compressed air storage tank. The pipe is equipped with a pressure regulating valve and a flow meter to control the pressure of the protective gas to 0.4-0.6MPa and the flow rate to 4-6m³ / h. 3 / h. The protective gas selected in this structure is dry compressed air (dew point below -40℃). Its function is to form a gas layer with a thickness of 1-2mm on the surface of the protective liquid layer. On the one hand, it can buffer the impact of high-speed fluid on the liquid layer and maintain the integrity of the liquid film; on the other hand, dry air can prevent the protective liquid from being diluted by absorbing moisture from the fluid, ensuring the stability of the neutralization reaction.

[0038] Working principle Waste gas combustion stage: Fluorine-containing waste gas generated during resin production (fluoride concentration approximately 800 mg / m³) 3 The gas enters combustion chamber 1 through the gas inlet pipe, with a flow rate controlled at 500 m³ / s. 3 / h; simultaneously, the combustion supply pipe delivers natural gas (flow rate 10m³ / h). 3 / h), the air supply pipe delivers combustion air (flow rate 12m³ / h). 3 The three substances (fluorine, hydrogen fluoride, carbon dioxide, and carbon dioxide) are mixed in combustion chamber 1 and ignited by an ignition device, maintaining a combustion temperature of 850°C. The fluorine-containing waste gas decomposes into products such as hydrogen fluoride and carbon dioxide at high temperature.

[0039] Fluid transport and protection stage: The high-temperature fluid after combustion (temperature about 820℃) enters the gas flow path 4 of the cooling chamber 3 through the exhaust pipe 2, and first flows downward along the vertical section; at this time, the metering pump of the protective liquid input pipe delivers 6% sodium hydroxide solution to the protective liquid retention chamber, and after flowing out from the outlet, it forms a 2.5mm thick liquid layer along the inner wall, neutralizing part of the hydrogen fluoride; at the same time, the protective gas input pipe delivers compressed air, which is sprayed out from the gas outlet to form a 1.5mm thick gas layer to prevent the liquid layer from being dispersed by the high-speed airflow (flow velocity about 6m / s).

[0040] Rapid cooling stage: The high-temperature fluid enters the horizontal flow path after a right-angle bend. The cooling water nozzle 5 is turned on, and the variable frequency water pump delivers cooling water to the nozzle. After being filtered by the filter screen 54, the water is atomized and sprayed out from the outlet 53 (droplet diameter is about 80μm). The atomized cooling water mixes with the fluid in the horizontal direction and completes heat exchange in the horizontal flow path. The fluid temperature drops rapidly to below 260℃. The cooled fluid is discharged from the outlet of the cooling chamber 3 and enters the subsequent cleaning tower for deep defluorination treatment.

[0041] Self-cleaning stage: The controller triggers the backwash program, first closing the cooling water inlet pipe 55 valve, then opening the backwash water inlet pipe 57 solenoid valve, and 0.8MPa high-pressure water flows from the spray outlet to the filter screen 54, removing the attached impurities; then the discharge pipe 59 solenoid valve is opened, and the impurities and wastewater are discharged to the collection tank; after 45 seconds, the backwash water and discharge pipe 59 valves are closed, the cooling water supply is restored, and the nozzle continues to work.

[0042] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A waste gas combustion structure for a waste gas treatment device, comprising: Combustion chamber (1), on which a gas inlet pipe, a combustion supply pipe and an air supply pipe are provided, and an exhaust pipe (2) is provided at the bottom of the combustion chamber (1); Cooling chamber (3) is located below combustion chamber (1). The inlet of the top of cooling chamber (3) is connected to combustion chamber (1) through exhaust pipe (2). The cooling chamber (3) is characterized in that it further includes: Gas flow path (4), the gas flow path (4) is set in the cooling chamber (3), the gas flow path (4) first extends downward from the inlet at the top of the cooling chamber (3) and then bends at a right angle and extends horizontally to the outlet of the cooling chamber (3); Cooling water nozzle (5) is disposed on the side wall of the cooling chamber (3); The height of the cooling water nozzle (5) is located on the horizontal center plane of the horizontal extension of the gas flow path (4), and the output end of the cooling water nozzle (5) is horizontally oriented towards the horizontal extension of the gas flow path (4).

2. The exhaust gas combustion structure of the exhaust gas treatment apparatus according to claim 1, characterized by, Also includes: A protective liquid layer generating pipe (6) is provided on the inner wall of the upstream side of the gas flow path (4). The protective liquid layer generating pipe (6) extends and is distributed along the circumferential direction of the gas flow path. A protective liquid outlet (7) is provided at the lower part of the protective liquid layer generating pipe (6). The cooling chamber (3) has an input pipe on its outer wall for supplying protective liquid to the protective liquid layer generating pipe (6), and the protective liquid outlet (7) is used to output the protective liquid to the inner wall on the upstream side of the gas flow path (4) and form a protective liquid layer on the inner wall on the upstream side of the gas flow path (4).

3. The waste gas combustion structure of the waste gas treatment equipment according to claim 2, characterized in that, Also includes: A protective gas layer generating pipe (8) is provided on the inner wall of the upstream side of the gas flow path (4) and located above the protective liquid layer generating pipe (6). The protective gas generating pipe extends along the circumferential direction of the gas flow path, and a protective gas flow outlet (9) is provided at the lower part of the protective gas layer generating pipe (8). The cooling chamber (3) has an input pipe on its outer wall for supplying protective gas to the protective gas layer generating pipe (8). The protective gas flow outlet (9) is located inside the protective liquid flow outlet (7). The protective gas flow outlet (9) is used to output protective gas to the surface of the protective liquid layer and form a protective gas layer on the surface of the protective liquid layer.

4. The waste gas combustion structure of the waste gas treatment equipment according to claim 1, characterized in that, The cooling water nozzle (5) also includes: The nozzle body (50) is provided with a filter chamber (51) and an output channel (52) communicating with the filter chamber (51). One end of the nozzle body (50) is provided with an output port (53) communicating with the output channel (52), and the other end is a closed end. A filter screen (54) is disposed in a filter chamber (51) for filtering cooling water; Cooling water inlet pipe (55) is located on one side of the nozzle body (50) and communicates with the filter chamber (51) upstream of the filter screen (54).

5. The waste gas combustion structure of a waste gas treatment device according to claim 4, characterized in that, Also includes: A backflush chamber (56) is disposed in the nozzle body (50) and the backflush chamber (56) is circumferentially distributed around the output flow channel (52); A backwash water inlet pipe (57) is provided on the nozzle body (50) and communicates with the backwash chamber (56); Backwash water outlet (58) is located on the upstream side of the output channel (52) and communicates with the backwash chamber (56). The backwash water outlet (58) faces the filter screen (54). The discharge pipe (59) is provided on the nozzle body (50) to discharge the impurities that are separated from the filter screen (54) during backwashing. The backflush water spray outlet (58) has several outlets that are evenly spaced along the circumference of the backflush chamber (56).

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