A double push plate kiln with atmosphere protection structure

Abstract

The present application discloses a double push plate kiln with an atmosphere protection structure, which relates to the technical field of push plate kilns, and includes a kiln body, a track assembly and a dust removal assembly. The kiln body is provided with an air intake duct and an exhaust duct, and the end of the air intake duct away from the kiln body is connected to the gas source, the track assembly passes through the kiln body, the track assembly is provided with double push plates, and the track assembly is also provided with a plurality of push assemblies for pushing the push plates to move, the dust removal assembly is installed on the exhaust duct, and the dust removal assembly is used to filter dust in the gas discharged from the exhaust duct, so that the gas discharged from the exhaust duct meets the emission standards. The present application has the effect of strengthening environmental protection.

Description

Technical Field

[0001] The present application relates to the technical field of push plate kilns, and in particular to a double push plate kiln with an atmosphere protection structure. Background Art

[0002] Double push plate kiln is widely used in ceramics, building materials, chemical industry and other industries, especially for large-scale production of new powder materials, such as zirconium oxide powder, magnetic materials, lithium battery materials, electronic powder, chemical powder, etc. In addition, it is also used for the sintering of magnetic materials, calcining of magnetic material raw materials, calcining of rare earth materials, and mass production of structural ceramics and electronic ceramics.

[0003] The working principle of the double push plate kiln is continuous. After the raw materials enter the furnace, they will pass through the preheating zone, firing zone and cooling zone in turn. During operation, the heat generated in the furnace will be transferred to the raw materials in turn, causing them to gradually heat up. When the raw materials reach the required firing temperature, the heat source in the furnace will be adjusted to the optimal state to ensure the firing quality. After the firing is completed, the cold air in the cooling zone will quickly cool the product to ensure its quality and appearance. Since the temperature in the firing zone is relatively high, the material is very likely to undergo oxidation reaction in the firing zone. Therefore, high-density inert gas is generally filled in the firing zone to try to ensure the production quality of the product.

[0004] However, in the above technology, due to the long-term operation of the kiln, a large amount of dust will be generated inside the kiln. Therefore, when the gas in the kiln needs to be discharged, the gas will carry a large amount of dust, and directly discharging a large amount of dust into the atmosphere will cause pollution to the atmospheric environment. Summary of the invention

[0005] The purpose of the present application is to provide a double push plate kiln with an atmosphere protection structure, which can filter dust in exhaust gas, so as to make the exhaust gas meet the emission standards as much as possible and enhance the protection of the environment.

[0006] The double push plate kiln with atmosphere protection structure provided in this application adopts the following technical solution:

[0007] A kiln body, wherein an air inlet pipe and an air exhaust pipe are arranged on the kiln body, and an end of the air inlet pipe away from the kiln body is connected to an air source;

[0008] A track assembly, the track assembly passes through the kiln body, the track assembly is provided with double push plates, and the track assembly is also provided with a plurality of push assemblies for pushing the push plates to move;

[0009] A dust removal component is installed on the exhaust duct and is used to filter dust in the gas discharged from the exhaust duct, so that the gas discharged from the exhaust duct meets the emission standards.

[0010] Optionally, the dust removal assembly includes a filter membrane, and the filter membrane is coaxially fixedly mounted on the inner wall of the exhaust duct.

[0011] Optionally, a dust shaking piece is further provided in the exhaust duct, a mounting frame is provided in the exhaust duct, the dust shaking piece is installed on the mounting frame, and the dust shaking piece is used to shake off the dust on the filter membrane to avoid the filter membrane from being blocked as much as possible.

[0012] Optionally, the mounting frame is located on a side of the filter membrane that is relatively far away from the kiln body, and a power supply assembly is also provided on the mounting frame, the power supply assembly includes an impeller and an electromagnetic power generation assembly, the electromagnetic power generation assembly is installed on the mounting frame, the impeller is rotatably installed on the mounting frame, the impeller is connected to the electromagnetic power generation assembly, the electromagnetic power generation assembly is connected to the dust shaking piece through a wire, the wind in the exhaust duct drives the impeller to rotate, thereby making the electromagnetic power generation assembly generate electricity, and the electromagnetic power generation assembly supplies power to the dust shaking piece to ensure the continuous operation of the dust shaking piece as much as possible.

[0013] Optionally, a detection component is provided between the electromagnetic power generation component and the dust shaking component, and the detection component is configured as a current tester, and the current tester is connected in series with the electromagnetic power generation component and the dust shaking component. When the value measured by the current tester is lower than a predetermined value, it indicates that the filter membrane is too severely clogged at this time, and less gas can pass through, thereby causing the impeller speed to decrease and the power generation of the electromagnetic generator to decrease.

[0014] Optionally, an adjusting component for adjusting the diameter of the exhaust pipe is provided on the exhaust pipe. When the filter membrane is blocked, the adjusting component is started, and the adjusting component reduces the diameter of the exhaust pipe between the filter membrane and the impeller to increase the pressure and momentum of the gas there, thereby increasing the impeller speed and the power generation of the electromagnetic generator, thereby making the dust shaking piece have a stronger output power and a dust removal effect on the filter membrane.

[0015] Optionally, the exhaust duct is connected to the air inlet duct, and the exhaust duct reintroduces the filtered gas into the kiln body to achieve recycling of resources.

[0016] Optionally, a liquid filter device is provided between the exhaust pipe and the inlet pipe, and the liquid filter device can filter harmful gases in the gas after dust removal to ensure the purity of the gas flowing back into the kiln body as much as possible.

[0017] Optionally, the exhaust duct is arranged in a horizontal direction, and a collection component for collecting dust is also provided on the kiln main body, and the collection component is connected to the exhaust duct, and the connection between the collection component and the exhaust duct is close to the filter membrane.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. The setting of the dust removal component in the present application can remove dust from the exhaust gas discharged from the kiln, so that the exhausted gas can meet the emission standards, thereby achieving the effect of protecting the environment; in addition, the setting of the dust shaking member in the present application can continuously keep the filter membrane in a shaking state, so that the dust adhering to the filter membrane is shaken off, thereby avoiding the filter membrane from being blocked by dust as much as possible, thereby ensuring the stable operation of the dust removal component and the dust removal effect of the dust removal component on the exhaust gas as much as possible;

[0020] 2. The power supply component in this embodiment converts the wind energy generated when the gas flows through the exhaust duct into the electric energy required by the dust shaking part. Therefore, the dust shaking part in this application does not need additional energy supply, thereby achieving the effect of energy saving as a whole; at the same time, the detection component in this application can also determine whether the air volume flowing through the filter membrane is sufficient according to the amount of electricity generated by the power supply component, and then determine the degree to which the filter membrane is blocked by dust, so that workers can clean the dust on the filter membrane in time;

[0021] 3. When the filter membrane is blocked, the flow rate and flow velocity of the gas will decrease, so the speed of the impeller and the power generation of the electromagnetic generator will decrease. At this time, the output power of the dust-shaking piece will decrease, resulting in a decrease in the dust removal effect on the filter membrane. Therefore, by adjusting the setting of the component, the diameter of the exhaust pipe between the filter membrane and the impeller is reduced, thereby increasing the pressure and momentum of the gas there. Therefore, the gas flowing through there has a large momentum, which can increase the speed of the impeller, thereby increasing the power generation of the electromagnetic generator, and then increasing the output power of the dust-shaking piece, so as to ensure the dust removal effect of the filter membrane of the dust-shaking piece as much as possible;

[0022] 4. The connection between the exhaust duct and the air inlet duct can allow the inert gas in the exhaust gas to re-enter the kiln, thereby realizing the recycling of resources and reducing resource waste; at the same time, the setting of the liquid filtering device can remove harmful substances in the gas after dust removal to ensure the purity of the inert gas returning to the kiln body as much as possible, thereby further improving the overall resource utilization and the evolution effect of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the structure of the dust removal assembly in the embodiment of the present application;

[0025] Figure 3 This Figure 2 The enlarged schematic diagram of point A in the middle;

[0026] Figure 4 is a schematic diagram of the structure of the power supply assembly in an embodiment of the present application;

[0027] In the figure, 1. kiln body; 11. air inlet pipe; 111. mounting frame; 12. exhaust pipe; 121. slideway; 2. track assembly; 3. pushing assembly; 4. dust removal assembly; 41. filter membrane; 5. dust shaking piece; 6. power supply assembly; 61. impeller; 62. protective tube; 63. magnetic block; 64. coil; 65. conductive ring; 66. connecting rod; 7. detection assembly; 8. adjustment assembly; 81. cylinder; 82. slider; 9. liquid filtering device; 10. collecting assembly; 101. collecting pipe; 102. collecting box. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 , further details of this application are given.

[0029] A double push plate kiln with atmosphere protection structure, refer to Figure 1 and Figure 2 , including a kiln main body 1, a track assembly 2 and a dust removal assembly 4.

[0030] The kiln body 1 in this embodiment is fixedly installed on the ground, and mainly includes a preheating zone, a firing zone and a cooling zone. A feed port is provided at one end of the preheating zone, a discharge port is provided at one end of the cooling zone, and an air intake pipe 11 and an exhaust pipe 12 are provided at the upper end of the firing zone. The air intake pipe 11 in this embodiment is connected to a gas source at one end away from the kiln body 1. The gas source in this embodiment can be an inert gas such as hydrogen or nitrogen. When the material is burned at high temperature, the inert gas can isolate oxygen, thereby minimizing oxidation reaction of the material and thereby improving the production quality of the product.

[0031] The track component 2 in this embodiment is configured as a circular track, which passes through the kiln body 1 in the direction from the feed port to the discharge port. Two parallel tracks are arranged on the upper end face of the circular track, and push plates are arranged on the tracks. Four pushing components 3 for pushing the push plates to move are respectively arranged at the four corners of the circular track. The pushing component 3 in this embodiment is configured as a hydraulic cylinder, and each hydraulic cylinder is provided with two output shafts, and the two output shafts correspond one by one to the push plates on the two parallel tracks.

[0032] The dust removal component 4 in this embodiment is configured as a filter membrane 41 , which allows gas to pass through but does not allow fixed particles to pass through. The filter membrane 41 is coaxially fixedly installed on the inner wall of the exhaust pipe 12 .

[0033] When the material needs to be burned, the gas source is started first. After the inert gas enters the burning area from the air inlet pipe 11, the original air in the burning area will be squeezed out and discharged from the exhaust pipe 12. When the air in the burning area is discharged from the exhaust pipe 12, it will carry the dust in the burning area into the exhaust pipe 12. At this time, the filter membrane 41 in the exhaust pipe 12 can filter the dust in the gas, so that relatively clean gas is discharged into the atmosphere, thereby minimizing the pollution of the atmosphere by the smoke from the kiln.

[0034] After the original air in the firing zone is exhausted, the kiln equipment is started so that the material will not come into contact with air during high-temperature burning in the firing zone, thereby preventing oxidation reaction. In addition, since the temperature in the firing zone is relatively high, the gas molecules inside the firing zone are relatively active, thereby increasing the pressure. The gas in the firing zone will also be continuously discharged from the exhaust pipe 12, and the filter membrane 41 will also continue to perform filtering work. Therefore, the gas source also needs to continuously provide inert gas for the tank body in the firing zone. At this time, a large amount of inert gas will need to be consumed. Therefore, the exhaust pipe 12 and the air intake pipe 11 in this embodiment are interconnected. After the filter membrane 41 in the exhaust pipe 12 purifies the flue gas, the purified gas will re-enter the firing zone along the air intake pipe 11, thereby realizing the recycling of inert gas resources.

[0035] In addition, since harmful gases such as sulfur dioxide may be generated when the material is burned, the gas filtered through the filter membrane 41 may not be a pure inert gas. Therefore, in this embodiment, a liquid filter device 9 is also provided between the air intake pipe 11 and the exhaust pipe 12. The liquid filter device 9 is filled with an alkaline solution, such as sodium hydroxide. Acidic gases such as sulfur dioxide can be dissolved in alkaline solutions, while inert gases such as hydrogen and nitrogen cannot be dissolved in alkaline solutions. Therefore, after the smoke is double filtered by the filter membrane 41 and the alkaline solution, the purity of the secondary utilization gas can be improved, thereby improving the protection effect of the inert gas on the material, and then realizing the recycling of resources while ensuring the quality of the product as much as possible.

[0036] Reference Figure 2 and Figure 3 A dust shaking piece 5 is also provided in the exhaust duct 12. The dust shaking piece 5 in this embodiment is configured as an ultrasonic transmitter. A mounting frame 111 is fixedly provided on the inner wall of the exhaust duct 12. The mounting frame 111 is located on a side of the filter membrane 41 relatively away from the kiln body. The ultrasonic transmitter is fixedly mounted on the mounting frame 111, and the output end of the ultrasonic transmitter is facing the filter membrane 41.

[0037] The mounting frame 111 is also provided with a power supply assembly 6, which includes an impeller 61 and an electromagnetic power generation assembly (combined with Figure 4 ).

[0038] The electromagnetic power generation assembly includes a protective tube 62, a connecting rod 66, a magnetic block 63, a coil 64 and a conductive ring 65. The protective tube 62 in this embodiment is a closed type. The protective tube 62 is fixedly mounted on the mounting frame 111. The connecting rod 66 passes through the protective tube 62 and is rotatably mounted on the mounting frame 111. The connecting rod 66 is coaxially arranged with the protective tube 62. The magnetic block 63 in this embodiment is configured as two magnetic blocks 63 with different magnetic properties. The two magnetic blocks 63 with different magnetic properties are fixedly mounted on the inner wall of the protective tube 62, and the two magnetic blocks 63 with different magnetic properties are relatively arranged on both sides of the connecting rod 66. The coil 64 is located inside the protective tube 62 and is coaxially fixedly mounted on the connecting rod. On the outer wall of the connecting rod 66, the coil 64 is also located between the two magnetic blocks 63 with different magnetic properties, and the coil 64 does not contact the two magnetic blocks 63 with different magnetic properties. In this embodiment, two conductive rings 65 are provided, and the two conductive rings 65 are fixedly mounted on the mounting frame 111, and the two conductive rings 65 are coaxially slidably sleeved on the outer wall of the connecting rod 66. The two conductive rings 65 are not located inside the protective tube 62, and the coil 64 is divided into two parts by the connecting rod 66, one part of which is electrically connected to one of the conductive rings 65 through a wire, and the other part is connected to another wire ring through a wire, and the conductive ring 65 is electrically connected to the ultrasonic transmitter through a wire. (The wires in the figure are not shown)

[0039] When the equipment is started, the gas in the kiln enters the exhaust pipe 12, and the gas first passes through the filter membrane 41. After the filter membrane 41 filters the dust in the gas, the gas will continue to flow along the exhaust pipe 12. When the gas flows through the impeller 61, it will drive the impeller 61 to rotate, and the rotation of the impeller 61 drives the connecting rod 66 and the coil 64 to rotate, so the coil 64 will cut the magnetic field generated by the two opposite magnetic blocks 63. After the coil 64 cuts the magnetic field, current will be generated in the coil 64, and the wire and the conductive ring 65 will conduct the current to the ultrasonic transmitter, thereby realizing the power supply of the ultrasonic transmitter. In this embodiment, the wind energy generated when the gas flows through the exhaust pipe 12 is converted into the electrical energy required by the ultrasonic transmitter. Therefore, the ultrasonic transmitter in this application does not require additional energy supply. In addition, the ultrasonic transmitter in the present embodiment can continuously transmit ultrasonic waves, and the ultrasonic waves transmitted can drive the filter membrane 41 to vibrate, and the filter membrane 41 will shake off the dust attached to the filter membrane 41 when vibrating, thereby avoiding the clogging of the filter membrane 41 by dust as much as possible, and thus ensuring the stable operation of the filter membrane 41 and the dust removal effect of the filter membrane 41 on the exhaust gas as much as possible. The start and stop of the ultrasonic transmitter in the present embodiment depends on whether there is air flow in the exhaust duct 12, and the air flow indicates that the filter membrane 41 is filtering the gas. Therefore, the filter membrane 41 and the ultrasonic transmitter in the present embodiment can be regarded as adaptive work with relatively high automation.

[0040] A detection component 7 is also provided between the electromagnetic power generation component and the ultrasonic transmitter. The detection component 7 in this embodiment is configured as a current tester. The current tester is connected in series with the electromagnetic power generation component and the ultrasonic transmitter. The current tester is electrically connected to the control center. The current tester transmits the measured value to the control center. When this value is lower than a predetermined value, it means that the power generation of the electromagnetic power generation component is relatively small at this time. The small power generation of the electromagnetic power generation component indicates that the speed of the impeller 61 is slow. The slow speed of the impeller 61 indicates that the gas flow rate in the exhaust duct 12 is reduced. The reduced gas flow rate in the exhaust duct 12 indicates that the filter membrane 41 is too seriously blocked. Therefore, the current value measured by the current tester can show the blockage of the filter membrane 41, so that the workers can clean the filter membrane 41 in time.

[0041] In addition, an adjusting component 8 for adjusting the diameter of the exhaust pipe 12 is provided on the exhaust pipe 12 , and the adjusting component 8 includes a slider 82 and a cylinder 81 .

[0042] A slide groove 121 for the slider 82 to slide and insert is provided on the pipe wall of the exhaust pipe 12, and the slide groove 121 is located between the filter membrane 41 and the impeller 61. In this embodiment, the upper end surface of the slider 82 is set to be an arc surface adapted to the inner wall of the exhaust pipe 12. When the slider 82 is in the initial position, the arc surface of the slider 82 is a part of the pipe wall of the exhaust pipe 12. The cylinder 81 is set on the side of the slider 82 away from the exhaust pipe 12. The output shaft of the cylinder 81 is fixedly connected to the slider 82, and the cylinder 81 is electrically connected to the control center.

[0043] When the value measured by the current tester is relatively low, it means that the flow speed of the gas in the pipeline is relatively low at this time. Therefore, the control center starts the cylinder 81, and the cylinder 81 drives the slider 82 to move in the direction close to the exhaust pipe 12. At this time, the diameter of the exhaust pipe 12 at this location will be reduced, and because the gas pressure will increase when it suddenly enters a smaller space from a larger space, the gas pressure in the exhaust pipe 12 will increase when it flows through the slider 82. Then, when the gas flows from the slider 82 to the exhaust pipe 12 of normal diameter, its kinetic energy will increase, and the flow speed of the gas will increase, thereby accelerating the rotation speed of the impeller 61, thereby increasing the power generation of the electromagnetic power generation component, and therefore the ultrasonic transmitter will receive more electricity, and the ultrasonic transmitter can continue to work or the power will increase, so the ultrasonic The transmitter can emit ultrasonic waves or more powerful ultrasonic waves, so that the filter membrane 41 continues to vibrate or vibrates with a larger amplitude, so that the dust on the filter membrane 41 is shaken off, thereby improving the ultrasonic transmitter's dust removal effect on the filter membrane 41, so that the filter membrane 41 can resume normal operation, and when the filter membrane 41 can resume normal operation, the gas in the exhaust pipe 12 can also flow normally, and then the entire equipment can continue to operate normally; and when the filter membrane 41 returns to normal, the gas can flow normally, and the impeller 61 can rotate at a normal speed, so that the electromagnetic power generation component can generate enough electricity. At this time, the value measured by the current tester will continue to remain within the normal range. At this time, the control center will start the cylinder 81 to contract, driving the slider 82 back to the initial position to restore the normal discharge volume of the exhaust pipe 12.

[0044] The coordinated use of the power supply component 6 and the dust shaking component 5 in the present embodiment enables the device to keep the filter membrane 41 in a relatively efficient working state without any additional energy, and the coordinated use of the power supply component 6, the detection component 7, the dust shaking component 5 and the adjustment component 8 enables the device to adaptively adjust and remove dust on the filter membrane 41 to restore the normal working state of the filter membrane 41 even when the filter membrane 41 in the present embodiment is in a serious blockage state. The entire process does not require human regulation and has a very high level of automation.

[0045] It should be noted that in this embodiment, the middle section of the exhaust duct 12 is arranged in the horizontal direction, and the filter membrane 41, the mounting frame 111 and the slider 82 are all located on this section of the exhaust duct 12. This section of the exhaust duct 12 is also connected to a collecting component 10, and the collecting component 10 includes a collecting pipe 101 and a collecting box 102.

[0046] Continue to refer to Figure 2 and Figure 3 The collecting box 102 is located below this section of the exhaust duct 12, one end of the collecting duct 101 is connected to the exhaust duct 12, and the other end of the collecting duct 101 is connected to the collecting box 102. The connecting point between the collecting duct 101 and the exhaust duct 12 is close to the filter membrane 41, and the connecting point between the collecting duct 101 and the exhaust duct 12 is located on the side of the filter membrane 41 that is relatively close to the kiln body. After the dust removal component cleans the dust on the filter membrane 41, the dust will fall into the collecting duct 101 due to gravity, and finally fall into the collecting box 102, thereby achieving the dust collection effect.

[0047] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double push plate kiln with an atmosphere protection structure, characterized in that: include: A kiln body (1), wherein an air intake pipe (11) and an air exhaust pipe (12) are provided on the kiln body (1), and an end of the air intake pipe (11) away from the kiln body (1) is connected to an air source; A track assembly (2), the track assembly (2) passing through the kiln body (1), the track assembly (2) being provided with a double push plate, and the track assembly (2) being further provided with a plurality of push assemblies (3) for pushing the push plates to move; a dust removal component (4), the dust removal component (4) being mounted on the exhaust duct (12), the dust removal component (4) being used to filter dust in the gas exhausted from the exhaust duct (12), so that the gas exhausted from the exhaust duct (12) complies with emission standards; The dust removal component (4) comprises a filter membrane (41), and the filter membrane (41) is coaxially fixedly mounted on the inner wall of the exhaust pipe (12); A dust shaking piece (5) is also provided in the exhaust duct (12), a mounting frame (111) is provided in the exhaust duct (12), the dust shaking piece (5) is mounted on the mounting frame (111), and the dust shaking piece (5) is used to shake off dust on the filter membrane (41) to avoid clogging of the filter membrane as much as possible; The mounting frame (111) is located on a side of the filter membrane (41) relatively far from the kiln body. The mounting frame (111) is also provided with a power supply component (6). The power supply component (6) comprises an impeller (61) and an electromagnetic power generation component. The electromagnetic power generation component is mounted on the mounting frame (111). The impeller (61) is rotatably mounted on the mounting frame (111). The impeller (61) is connected to the electromagnetic power generation component. The electromagnetic power generation component is connected to the dust shaking member (5) via a wire. The wind in the exhaust duct (12) drives the impeller (61) to rotate, thereby causing the electromagnetic power generation component to generate electricity. The electromagnetic power generation component supplies power to the dust shaking member (5) to ensure that the dust shaking member (5) continues to work as much as possible. A detection component (7) is provided between the electromagnetic power generation component and the dust shaking component (5), and the detection component (7) is configured as a current tester. The current tester is connected in series with the electromagnetic power generation component and the dust shaking component (5). When the value measured by the current tester is lower than a predetermined value, it indicates that the filter membrane (41) is too seriously blocked at this time, and less gas can pass through, thereby causing the impeller (61) to rotate at a reduced speed, and the power generation of the electromagnetic generator to decrease; The exhaust duct (12) is provided with an adjusting component (8) for adjusting the diameter of the exhaust duct (12); when the filter membrane (41) is blocked, the adjusting component (8) is activated, and the adjusting component (8) reduces the diameter of the exhaust duct (12) between the filter membrane (41) and the impeller (61), thereby increasing the rotation speed of the impeller (61) and the power generation of the electromagnetic generator, thereby enabling the dust shaking element (5) to have a stronger output power and a better dust removal effect on the filter membrane (41).

2. The double push plate kiln with atmosphere protection structure according to claim 1, characterized in that: The exhaust pipe (12) is connected to the air intake pipe (11), and the exhaust pipe (12) re-introduces the filtered gas into the kiln body to achieve recycling of resources.

3. The double push plate kiln with atmosphere protection structure according to claim 2 is characterized in that: A liquid filter device (9) is provided between the exhaust pipe (12) and the inlet pipe, and the liquid filter device (9) is capable of filtering harmful gases in the gas after dust removal, so as to ensure the purity of the gas flowing back into the kiln body as much as possible.

4. The double push plate kiln with atmosphere protection structure according to claim 1, characterized in that: The exhaust duct (12) is arranged in a horizontal direction, and a collection component (10) for collecting dust is also provided on the kiln body (1), the collection component (10) is connected to the exhaust duct (12), and the connection between the collection component (10) and the exhaust duct (12) is close to the filter membrane (41).

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