Aluminum nitride ceramic debinding tail gas treatment system

Abstract

The utility model discloses an aluminum nitride ceramic debinding tail gas treatment system, comprising a debinding furnace, a primary pipeline, a primary combustion furnace, a secondary pipeline, an adsorption tower and an exhaust pipeline which are sequentially arranged and connected. The debinding furnace is provided with an air outlet, and the debinding tail gas is discharged from the exhaust pipeline after passing through the primary pipeline, the primary combustion furnace, the secondary pipeline and the adsorption tower. A plurality of cover bones hinged to the primary pipeline and a soft cover body connected to each cover bone are provided between the primary pipeline and the air outlet, and the cover body and the cover bone are connected to each other to form a gas collecting hood; a baffle is provided in the primary pipeline, and two connecting plates are symmetrically provided below the baffle, and a sliding rod is provided on each connecting plate, one end of the sliding rod is fixedly connected to the connecting plate, and the other end of the sliding rod is in contact with the cover bone. The solution of the utility model solves or alleviates the problem that the mixing ratio of the combustion-supporting gas and the debinding tail gas cannot be automatically adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical tail gas treatment, in particular to an aluminum nitride ceramic debinding tail gas treatment system. Background Art

[0002] In the process of aluminum nitride ceramic molding, organic polymers such as binders, dispersants, and plasticizers are added to the ceramic powder to ensure that it has a certain strength and toughness. The above organic polymers will decompose under high temperature conditions and produce a large amount of harmful exhaust gas, which contains high concentrations of hydrocarbons. Direct emission will not only pollute the environment, but also endanger human health.

[0003] In order to effectively decompose and remove harmful exhaust gas, the combustion furnace needs to provide sufficient oxygen to achieve complete combustion. Therefore, external air is added as a combustion aid to provide additional oxygen to ensure that the organic polymers in the exhaust gas are completely burned in the combustion furnace and converted into harmless gases such as carbon dioxide and water.

[0004] The mixing ratio of exhaust gas and air is crucial to the efficiency and effect of the combustion process. A poor mixing ratio will bring about the following adverse effects: Incomplete combustion: The amount of oxygen is not enough to completely oxidize the organic polymers in the exhaust gas, resulting in incomplete combustion and the production of harmful substances such as carbon monoxide and unburned hydrocarbons; Reduced energy efficiency: Too much air will lower the combustion temperature, while too little air will result in insufficient oxygen, both of which will lead to reduced energy efficiency and increased fuel consumption; Environmental pollution: A poor mixing ratio will lead to increased emissions of harmful substances, polluting the environment and endangering human health; Reduced system stability: A poor mixing ratio will cause instability in the combustion process, resulting in temperature fluctuations in the combustion furnace and increased system failure rate.

[0005] In existing exhaust gas treatment systems, air hoods are usually used to introduce external air and mix it with exhaust gas. However, the opening of these air hoods is fixed and cannot be automatically adjusted according to actual operating conditions. When the exhaust gas flow rate is large, the air hood with a fixed opening cannot provide enough air, resulting in incomplete combustion and the generation of harmful substances; when the exhaust gas flow rate is small, the air hood with a fixed opening may provide too much air, reducing the combustion temperature and efficiency. In short, it is unable to adapt to the changes in airflow under different working conditions, resulting in an unstable combustion process, increasing the system failure rate and maintenance costs. Utility Model Content

[0006] The utility model aims to solve or alleviate the problem that the mixing ratio of combustion-supporting gas such as air and debonding exhaust gas in the existing aluminum nitride ceramic debonding exhaust gas treatment system cannot be automatically adjusted.

[0007] The utility model is realized by the following technical solutions:

[0008] A system for treating aluminum nitride ceramic debinding exhaust gas, comprising a debinding furnace, a primary pipeline, a primary combustion furnace, a secondary pipeline, an adsorption tower and an exhaust pipeline, which are arranged and connected in sequence. The debinding furnace is provided with an air outlet, and the debinding exhaust gas is discharged from the exhaust pipeline from the air outlet through the primary pipeline, the primary combustion furnace, the secondary pipeline and the adsorption tower. A plurality of cover bones hinged to the primary pipeline and a soft cover body connected to each cover bone are arranged between the primary pipeline and the air outlet, and the cover body and the cover bones are connected to each other to form an air collecting hood; a baffle is arranged in the primary pipeline, and two connecting plates are symmetrically arranged below the baffle, and a sliding rod is arranged on each connecting plate, one end of the sliding rod is fixedly connected to the connecting plate, and the other end of the sliding rod is in contact with the cover bone; when the airflow ejected from the air outlet gradually increases and acts on the baffle, the baffle drives the sliding rod to move upward through the connecting plate, so that the angle between the cover bones becomes larger, and more combustion-supporting air is inhaled.

[0009] The air collecting hood in this solution can adapt to different exhaust gas flow rates and composition changes by automatically adjusting the opening to ensure stable operation of the system. Even if the exhaust gas flow rate fluctuates greatly, the air collecting hood can still ensure that the mixing ratio of external air and exhaust gas is appropriate, thereby ensuring stable combustion effect, improving combustion efficiency and system stability, and significantly enhancing exhaust gas treatment effects, reducing operating costs, and being more environmentally friendly.

[0010] Preferably, a tertiary pipeline and a secondary combustion furnace are provided between the adsorption tower and the exhaust pipe; one end of the tertiary pipeline is connected to the outlet of the adsorption tower, and the other end of the tertiary pipeline is connected to the inlet of the secondary combustion furnace, and the outlet of the secondary combustion furnace is connected to the exhaust pipe, so as to perform secondary combustion on the tail gas treated by the adsorption tower, and further decompose and remove the residual harmful organic components.

[0011] Preferably, a slide groove is provided on the cover frame, and a roller is provided at one end of the slide rod that contacts the cover frame, and the roller is movably matched with the slide groove, thereby reducing sliding friction and improving the flexibility and stability of opening and closing the gas collecting hood.

[0012] Preferably, each connecting plate is arc-shaped and symmetrically arranged outside the air outlet, and each connecting plate matches the contour of the air outlet, which helps to smoothly guide the airflow to impact the baffle, reduce the turbulence and eddy current of the airflow, reduce the airflow resistance, and play a guiding role in the process of the baffle returning when the airflow decreases or stops.

[0013] Preferably, the baffle is circular, and the diameter of the baffle gradually increases along the airflow direction, thereby optimizing the airflow path and reducing the airflow resistance at the outer edge of the baffle.

[0014] Preferably, the connecting plate is provided with a plurality of openings I distributed in an array, so as to divert the exhaust gas when the exhaust gas flow is too large.

[0015] Preferably, a stopper is provided under the baffle plate, and when the baffle plate falls, the stopper contacts the upper end of the air outlet, thereby achieving a buffering effect and reducing impact and wear.

[0016] Preferably, a fan is also provided at the outlet end of the exhaust duct to increase the air flow velocity and improve the exhaust effect.

[0017] Preferably, an opening II is provided on the cover frame, and a blocking rod is provided in the opening II. When the blocking rod passes through the opening II, the sliding rod can be blocked from moving downward relative to the cover frame.

[0018] Preferably, the secondary combustion furnace is provided with a combustion-supporting port connected to the outside world, through which external combustion-supporting gas is introduced to improve combustion efficiency.

[0019] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0020] 1. The gas collecting hood of the utility model can automatically adjust the opening to adapt to different exhaust gas flow rates and composition changes, ensuring the stable operation of the system. Even if the exhaust gas flow rate fluctuates greatly, the gas collecting hood can still ensure that the mixing ratio of external air and exhaust gas is appropriate, ensuring stable combustion effect, improving combustion efficiency and system stability, and significantly enhancing the exhaust gas treatment effect;

[0021] 2. A three-stage pipeline and a secondary combustion furnace are also provided between the adsorption tower and the exhaust pipe of the utility model. The secondary combustion furnace is used to perform secondary combustion on the tail gas treated by the adsorption tower to further decompose and remove the residual harmful organic components. In the secondary combustion furnace, through the introduction of combustion-supporting gases such as natural gas, the organic components in the tail gas are catalytically burned at high temperature and decomposed into harmless products such as carbon dioxide and water.

[0022] 3. Each connecting plate of the utility model is arc-shaped and symmetrically arranged outside the air outlet, and each connecting plate matches the contour of the air outlet. This solution helps to smoothly guide the airflow to impact the baffle, reduce the turbulence and eddy current of the airflow, reduce the airflow resistance, and play a guiding role in the return process of the baffle when the airflow is reduced or stopped. In practical applications, the connecting plate can be designed with multiple arcs to adapt to different airflow intensities; adjustable fixing devices can also be added to the connecting plate to facilitate installation and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model.

[0024] In the attached picture:

[0025] Figure 1 The overall structure diagram of the system of the utility model;

[0026] Figure 2 This is a structural diagram of the gas collecting hood of the utility model;

[0027] Figure 3 This is a schematic diagram of the positional relationship of the slide bar, the connecting plate, and the baffle of the utility model;

[0028] Figure 4 for Figure 2 A magnified view of the structure at A.

[0029] The reference numerals represent:

[0030] 1, debinding furnace, 11, air outlet, 2, primary pipeline, 3, gas collecting hood, 31, sliding rod, 351, roller, 32, hood body, 33, baffle, 331, block, 34, connecting plate, 341, opening I, 35, hood frame, 4, primary combustion furnace, 5, secondary pipeline, 6, adsorption tower, 7, tertiary pipeline, 8, secondary combustion furnace, 81, combustion-supporting port, 9, exhaust pipeline, 10, fan. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The schematic implementation mode of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model. It should be noted that the utility model is already in the actual research and development and use stage.

[0032] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0033] In the process of exhaust gas treatment, the mixing ratio of exhaust gas and air is crucial to the efficiency and effect of the combustion process. Insufficient oxygen will completely oxidize the organic polymers in the exhaust gas, resulting in incomplete combustion and the production of harmful substances such as carbon monoxide and unburned hydrocarbons. Reduced energy efficiency: too much air will reduce the combustion temperature, while too little air will lead to insufficient oxygen, both of which will lead to reduced energy efficiency and increased fuel consumption. Environmental pollution: poor mixing ratio will lead to increased emission of harmful substances, pollute the environment, and endanger human health. Reduced system stability: poor mixing ratio will cause instability in the combustion process, resulting in temperature fluctuations in the combustion furnace and increased system failure rate.

[0034] Embodiment 1:

[0035] Please refer to the attached Figure 1 -Attached Figure 4 The present embodiment provides an aluminum nitride ceramic debinding tail gas treatment system, comprising a debinding furnace 1, a primary pipeline 2, a primary combustion furnace 4, a secondary pipeline 5, an adsorption tower 6 and an exhaust pipeline 9 which are sequentially arranged and connected. The debinding furnace 1 is provided with an air outlet 11. The debinding tail gas is discharged from the exhaust pipeline 9 through the air outlet 11 through the primary pipeline 2, the primary combustion furnace 4, the secondary pipeline 5 and the adsorption tower 6. A plurality of cover frames 35 hinged to the primary pipeline 2 and a soft material connecting each cover frame 35 are provided between the primary pipeline 2 and the air outlet 11. The hood body 32 is connected to the hood frame 35 to form an air collecting hood 3; a baffle plate 33 is provided in the first-level pipeline 2, and two connecting plates 34 are symmetrically provided below the baffle plate 33, and each connecting plate 34 is provided with a sliding rod 31, one end of the sliding rod 31 is fixedly connected to the connecting plate 34, and the other end of the sliding rod 31 is in contact with the hood frame 35; when the air flow ejected from the air outlet 11 gradually increases and acts on the baffle plate 33, the baffle plate 33 drives the sliding rod 31 to move upward through the connecting plate 34, so that the angle between the hood frames 35 becomes larger, and more combustion-supporting air is inhaled.

[0036] It should be noted that the primary combustion furnace 4 performs primary incineration at a high temperature of 700°C, and sufficient oxygen is required to ensure the complete decomposition of organic polymers in the tail gas. The system forms a gas collecting hood 3 by means of multiple hood frames 35 and a soft hood body 32 disposed between the primary pipeline 2 and the gas outlet 11, ensuring that the tail gas of the combustion furnace can be effectively collected and enter the primary pipeline 2; the hood frame 35 is hinged to the primary pipeline 2, and can adjust the angle according to the impact force of the airflow, thereby adjusting the opening of the gas collecting hood 3; the gas collecting hood 3 plays a key role in the system, and by introducing external air to assist combustion, the tail gas is fully processed, and the sufficient oxygen supply improves the combustion efficiency of the primary combustion furnace 4, ensuring that the organic polymer is completely decomposed during the primary incineration process, and reducing the emission of unburned harmful gases.

[0037] It should be noted that the combustion efficiency depends on the mixing ratio of fuel and air. The air hood 3 can respond to the changes in the airflow of the combustion furnace in real time, automatically adjust the opening, adapt to different airflow conditions, maintain stable combustion, and avoid combustion fluctuations and incomplete combustion. When the airflow decreases, the opening of the air hood 3 becomes smaller to maintain appropriate air supply, prevent the combustion furnace from flameout, and improve the reliability of the system.

[0038] The hood body 32 adopts a multi-layer design, with an inner layer of high-temperature refractory material and an outer layer of flexible material to improve durability and sealing; an adjustable hinge is installed at the hinge between the hood frame 35 and the primary pipe 2, so that the hood frame 35 can be manually adjusted to open as needed; the baffle 33 can be designed to be streamlined to reduce airflow resistance; the air collecting hood 3 automatically adjusts the opening to adapt to different exhaust gas flow rates and composition changes to ensure stable operation of the system. Even if the exhaust gas flow rate fluctuates greatly, the air collecting hood 3 can still ensure that the mixing ratio of external air and exhaust gas is appropriate, ensuring stable combustion effect, improving combustion efficiency and system stability, and significantly enhancing exhaust gas treatment effect, reducing operating costs, and being more environmentally friendly.

[0039] It is understandable that high-temperature refractory materials can choose alumina, zirconia, silicon carbide and other materials as the inner layer according to the specific high-temperature environment and needs. These materials can provide excellent heat resistance and mechanical strength at high temperatures to ensure that the structure remains stable under extreme temperatures; flexible materials can choose silicone, fluororubber, PTFE and other flexible materials. These materials can provide good mechanical flexibility and weather resistance to ensure that the structure is easy to handle during operation and can adapt to changes in the external environment.

[0040] The adsorption tower 6 includes an adsorption tower 6 body, which is usually a vertical cylindrical structure and is filled with a certain amount of adsorption liquid; an air inlet pipe: the exhaust gas enters the adsorption tower 6 through the air inlet pipe, and the end of the air inlet pipe is inserted into the liquid to ensure that the gas and the liquid are fully in contact; a liquid adsorbent: the tower body is filled with a liquid for adsorbing pollutants in the exhaust gas, and commonly used adsorbents include water, alkali solution, acid solution or a special organic solvent; an exhaust pipe: the exhaust gas treated with adsorption is discharged through the exhaust pipe, and the exhaust pipe is located above the liquid; a liquid collecting tank: the area at the bottom of the tower body, used to collect the adsorption liquid; a circulating pump (optional): used to recycle or regenerate the adsorption liquid.

[0041] Working principle of adsorption tower 6: exhaust gas enters adsorption tower 6 through the air inlet pipe, and the end of the air inlet pipe penetrates into the liquid adsorbent; the exhaust gas forms bubbles in the liquid adsorbent through the air inlet pipe, and during the rising process of the bubbles in the liquid, the pollutants in the gas contact and react with the liquid adsorbent; through the rising of the bubbles and the contact with the liquid adsorbent, the pollutants are adsorbed or dissolved into the liquid; the purified gas rises above the liquid surface, is discharged through the air outlet pipe, and enters the next treatment link.

[0042] In this embodiment, a tertiary pipeline 7 and a secondary combustion furnace 8 are also provided between the adsorption tower 6 and the exhaust pipe 9; one end of the tertiary pipeline 7 is connected to the outlet end of the adsorption tower 6, and the other end of the tertiary pipeline 7 is connected to the inlet end of the secondary combustion furnace 8, and the outlet end of the secondary combustion furnace 8 is connected to the exhaust pipe 9.

[0043] It should be noted that the secondary combustion furnace 8 is used to perform secondary combustion on the exhaust gas treated by the adsorption tower 6, so as to further decompose and remove the residual harmful organic components; in the secondary combustion furnace 8, through the introduction of combustion-supporting gases such as natural gas, the organic components in the exhaust gas are catalytically burned at high temperature and decomposed into harmless products such as carbon dioxide and water.

[0044] In order to achieve better technical effects, the present embodiment may also install a temperature sensor in the secondary combustion furnace 8 to monitor the combustion temperature to ensure the best combustion effect; in addition, a catalyst bed is added to the secondary combustion furnace 8 to improve the decomposition efficiency of harmful gases; an automatic cleaning system may also be provided in the tertiary pipeline 7 and the secondary combustion furnace 8 to regularly clean carbon deposits and impurities to keep the system running efficiently.

[0045] System working process:

[0046] After the debonding tail gas enters the primary pipeline 2 through the combustion furnace outlet 11, it enters the primary combustion furnace 4 and performs primary incineration at a temperature of 700°C to perform primary incineration on the waste gas generated by the decomposition of a large amount of organic polymers in the early stage of debonding; the gas treated by the primary combustion furnace 4 then enters the adsorption tower 6, and the liquid in the tower is used to adsorb the unburned components in the waste gas, and finally passes through the secondary combustion furnace 8 for catalytic combustion under the combustion-supporting effect of natural gas. When the air flow velocity at the air outlet 11 increases, it impacts the baffle 33, driving the connecting plate 34 and the sliding rod 31 to move upward, and the sliding rod 31 increases the angle between the hood bones 35 by abutting the hood bones 35, thereby changing the opening of the gas collecting hood 3, allowing more air to enter the gas collecting hood 3 to participate in the combustion, and achieving the purpose of automatically adjusting the mixing ratio of the combustion-supporting agent.

[0047] In this embodiment, a slide groove is provided on the cover frame 35, and a roller 351 is provided at one end of the slide rod 31 that contacts the cover frame 35, and the roller 351 is movably matched with the slide groove. This solution reduces sliding friction and improves the flexibility and stability of the opening and closing of the air collecting hood 3.

[0048] In order to achieve better technical effects, a double slide groove structure is designed on the cover frame 35 so that the roller 351 slides between the two slide grooves to improve stability; the slide groove and the roller 351 use self-lubricating materials to reduce friction and improve durability; a guide device is added in the slide groove to ensure the accuracy of the sliding path of the roller 351.

[0049] In this embodiment, each connecting plate 34 is arc-shaped and symmetrically arranged outside the air outlet 11, and each connecting plate 34 matches the contour of the air outlet 11. This solution helps to smoothly guide the airflow to impact the baffle 33, reduce the turbulence and eddy current of the airflow, reduce the airflow resistance, and when the airflow is reduced or stopped, the baffle 33 plays a guiding role in the return process. In practical applications, the connecting plate 34 can be designed to be multi-section arc-shaped to adapt to different airflow intensities; an adjustable fixing device can also be added to the connecting plate 34 to facilitate installation and adjustment.

[0050] In this embodiment, the baffle 33 is circular; along the airflow direction, the diameter of the baffle 33 gradually increases, which can optimize the airflow path and reduce the airflow resistance at the outer edge of the baffle 33; in practical applications, the baffle 33 can be made of high-strength and lightweight materials to reduce weight and improve response speed.

[0051] In this embodiment, a plurality of openings I341 distributed in an array are provided on the connecting plate 34. In practical applications, if the airflow impact is too large, after the air collecting hood 3 opens to the maximum, the baffle 33 will have the adverse effect of blocking the airflow and affecting the combustion, so holes are opened on the connecting plate 34 to divert part of the airflow to achieve a compromise effect.

[0052] It is understandable that the size and position of the openings should be optimized based on stress analysis to ensure the structural strength of the connecting plate 34; the connecting plate 34 is manufactured using composite materials, and a strength layer is added at the openings to maintain the strength of the connecting plate 34 while reducing its weight.

[0053] In this embodiment, a stopper 331 is provided below the baffle plate 33. When the baffle plate 33 falls, the stopper 331 contacts the upper end of the air outlet 11, thereby achieving a buffering effect and reducing impact and wear.

[0054] It is understandable that the block 331 can be designed with adjustable height to adjust the buffering effect as needed; the block 331 is made of highly elastic, high-temperature resistant buffering material, and a multi-layer buffering device can be added inside the block 331 to improve the buffering effect and durability.

[0055] In this embodiment, a fan 10 is further provided at the outlet end of the exhaust duct 9 to increase the air flow velocity and improve the exhaust effect. The fan 10 is preferably a variable frequency fan 10, and the speed of the fan 10 can be adjusted according to actual needs to improve energy efficiency.

[0056] Embodiment 2:

[0057] On the basis of the above embodiment, an opening II is provided on the cover frame 35, and a blocking rod is provided in the opening II. When the blocking rod passes through the opening II, it can block the sliding rod 31 from moving downward relative to the cover frame 35. By adding a mechanical limit device, it is ensured that the sliding rod 31 is locked at a specific position, so as to control the movement range of the cover frame 35 and the sliding rod 31 during the operation of the system. During the treatment of aluminum nitride ceramic debinding tail gas, the gas collecting cover 3 and the sliding rod 31 need to be frequently adjusted to adapt to the changes in airflow. If the sliding rod 31 moves excessively, it may affect the normal operation of the system.

[0058] In practical applications, an automatic locking device can be designed to automatically insert a baffle to lock the position of the slide bar 31 when the airflow decreases; the position of the opening II can be adjusted to adapt to different airflow conditions; multiple baffle positions can be designed to achieve multi-level locking to adapt to different airflow intensities; after the baffle is inserted into the opening II, the position of the slide bar 31 is locked to prevent the slide bar 31 from sliding down.

[0059] In this embodiment, the secondary combustion furnace 8 is provided with a combustion-supporting port 81 connected to the outside. External combustion-supporting gas is introduced through the combustion-supporting port 81 to improve the combustion efficiency. In the secondary combustion furnace 8, the residual organic components in the tail gas need to be further decomposed, and the combustion-supporting agent can provide additional oxygen and fuel. By adding the combustion-supporting agent, the oxygen concentration and fuel supply in the combustion furnace can be increased, ensuring the complete combustion of the organic components and improving the combustion efficiency.

[0060] It is understandable that the flame retardant can be hydrogen, hydrogen, LPG, natural gas, propane; different combustion aids can be selected according to actual needs to improve the adaptability and flexibility of the system.

[0061] In practical applications, an automatic adjustment device can be designed to automatically adjust the opening of the combustion port 81 according to combustion needs; multiple combustion ports 81 can be designed at different positions to improve combustion efficiency; a filtering device can be installed at the combustion port 81 to prevent impurities from entering the combustion furnace and improve system reliability.

[0062] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present disclosure. The following points need to be explained: In the accompanying drawings of the embodiments of the present utility model, only the structures involved in the embodiments of the present utility model are involved, and other structures can refer to the usual design. In the absence of conflict, the features in the same embodiment and different embodiments of the present utility model can be combined with each other. The above is only an exemplary implementation of the present utility model, and is not used to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the attached claims.

Claims

1. A binder removal exhaust gas treatment system for aluminum nitride ceramics, comprising a binder removal furnace (1), a primary pipeline (2), a primary combustion furnace (4), a secondary pipeline (5), an adsorption tower (6) and an exhaust pipeline (9) which are sequentially arranged and connected, wherein the binder removal furnace (1) is provided with an air outlet (11), and the binder removal exhaust gas is discharged from the exhaust pipeline (9) after passing through the primary pipeline (2), the primary combustion furnace (4), the secondary pipeline (5) and the adsorption tower (6), and is characterized in that: A plurality of cover frames (35) hingedly connected to the first-level pipeline (2) and a soft cover body (32) connected to each cover frame (35) are provided between the first-level pipeline (2) and the air outlet (11); the cover body (32) and the cover frames (35) are connected to each other to form an air collecting hood (3); A baffle (33) is provided in the first-level pipe (2), and two connecting plates (34) are symmetrically provided below the baffle (33). A sliding rod (31) is provided on each connecting plate (34), and one end of the sliding rod (31) is fixedly connected to the connecting plate (34), and the other end of the sliding rod (31) is in contact with a cover frame (35). When the airflow ejected from the air outlet (11) gradually increases and acts on the baffle (33), the baffle (33) drives the sliding rod (31) to move upward through the connecting plate (34), so that the angle between the cover frames (35) increases, and combustion air is sucked in.

2. The aluminum nitride ceramic debinding tail gas treatment system according to claim 1, characterized in that: A tertiary pipeline (7) and a secondary combustion furnace (8) are also provided between the adsorption tower (6) and the exhaust pipeline (9); one end of the tertiary pipeline (7) is connected to the outlet end of the adsorption tower (6), the other end of the tertiary pipeline (7) is connected to the inlet end of the secondary combustion furnace (8), and the outlet end of the secondary combustion furnace (8) is connected to the exhaust pipeline (9).

3. The aluminum nitride ceramic debinding tail gas treatment system according to claim 2, characterized in that: The cover frame (35) is provided with a slide groove, and the end of the slide rod (31) that contacts the cover frame (35) is provided with a roller (311), and the roller (311) is movably matched with the slide groove.

4. The aluminum nitride ceramic debinding tail gas treatment system according to claim 3, characterized in that: Each of the connecting plates (34) is arc-shaped and is symmetrically arranged outside the air outlet (11); each connecting plate (34) matches the contour of the air outlet (11).

5. The aluminum nitride ceramic debinding tail gas treatment system according to claim 4, characterized in that: The baffle (33) is circular; along the airflow direction, the diameter of the baffle (33) gradually increases.

6. The aluminum nitride ceramic debinding tail gas treatment system according to claim 5, characterized in that: The connecting plate (34) is provided with a plurality of openings I (341) distributed in an array.

7. The aluminum nitride ceramic debinding tail gas treatment system according to claim 6, characterized in that: A stopper (331) is provided below the baffle plate (33); when the baffle plate (33) falls, the stopper (331) contacts the upper end of the air outlet (11).

8. The aluminum nitride ceramic debinding tail gas treatment system according to claim 7, characterized in that: A fan (10) is also provided at the outlet end of the exhaust duct (9).

9. The aluminum nitride ceramic debinding tail gas treatment system according to claim 8, characterized in that: The cover frame (35) is provided with an opening II, and a blocking rod is provided in the opening II. When the blocking rod passes through the opening II, the sliding rod (31) can be blocked from moving downward relative to the cover frame (35).

10. An aluminum nitride ceramic debinding tail gas treatment system according to any one of claims 2 to 9, characterized in that: The secondary combustion furnace (8) is provided with a combustion-supporting port (81) that is in communication with the outside.

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