A filtering device for waste incineration exhaust gas

Abstract

The present invention relates to the technical field of bag dust removal, and particularly to a filtering device for waste incineration exhaust gas, which comprises a box body, a first partition board, a cloth bag, a nozzle and an adjusting component. The box body is fixedly arranged, the first partition board is slidably arranged in the box body in the vertical direction, the cloth bag is arranged on the first partition board and penetrates through the first partition board in the vertical direction, the nozzle is located above the cloth bag and moves along with the first partition board, and the adjusting component is used to control the amount of gas that the nozzle can eject according to the distance that the nozzle slides downward. The length of the distance that the nozzle slides downward is positively correlated with the amount of gas ejected by the nozzle. By setting the first partition board, the cloth bag will drive the first partition board to slide downward under the impact force of the gas ejected by the nozzle, reducing the instantaneous tension received at the connection position between the cloth bag and the first partition board. Through the cooperation of the displacement of the nozzle and the cloth bag, the greater the moving amount of the cloth bag, the greater the amount of gas ejected by the nozzle, and the better the cleaning effect on the cloth bag. At the same time, it also avoids the reduction of the service life of the cloth bag due to long-term exposure to large impacts.

Description

Technical Field

[0001] The present invention relates to the technical field of bag dust removal, and particularly to a filtering device for waste incineration exhaust gas. Background Art

[0002] Some of the domestic waste cannot be sorted, recycled, and reused. In this case, incineration treatment is required. However, waste gas is generated during incineration. If it is directly discharged into the air, it will seriously pollute the environment. Therefore, it is necessary to treat the waste gas. Among the existing waste incineration waste gas treatment technologies, the bag filter is one of the commonly used devices.

[0003] As a highly efficient dust removal mechanism that utilizes the fact that dust particles collide with and are intercepted by fibers when they bypass the filter cloth fibers, and then filters and separates the dust in the flue gas. Among them, to ensure the filtering effect of the filter mesh bag on the dust and prevent it from being blocked due to the accumulation of dust, a pulse bag filter is provided in the existing technical solution. After a certain amount of dust has accumulated on the filter mesh bag, the filter mesh bag is vibrated in a pulsed manner by reverse blowing, so as to shake off the dust trapped on its surface and clean the dust particles stuck inside the filter cloth fibers of the filter mesh bag. However, due to the large instantaneous impact force generated by the pulsed gas, the bag will bear a large load during the dust cleaning process. After long-term exposure to such a high-intensity impact, the bag is extremely vulnerable to damage and even breakage. The frequent replacement of the bag not only increases the operating cost but also affects the normal operating time of the filtering device and reduces the waste gas treatment efficiency; while a smaller pulse has a poor cleaning effect on the bag, which also reduces the waste gas treatment efficiency. Summary of the Invention

[0004] Based on this, in view of the problem of the poor use effect of the current pulse bag filter, it is necessary to provide a filtering device for waste incineration exhaust gas.

[0005] The above object is achieved by the following technical solutions:

[0006] A filtering device for waste incineration exhaust gas, comprising a box body, a first partition board, a cloth bag and a gas pulse mechanism. The box body is fixedly arranged. The first partition board is slidably arranged in the box body in the vertical direction and is slidably sealed with the box body. The first partition board divides the box body into two upper and lower cavities. The box body is provided with an air inlet and an air outlet. The air inlet is communicated with the cavity below the first partition board, and the air outlet is communicated with the cavity above the first partition board. A first spring that can stretch and contract in the vertical direction is arranged in the box body. The first spring connects the box body and the first partition board. The cloth bag is arranged on the first partition board and penetrates through the first partition board in the vertical direction. The two cavities are communicated through the cloth bag. The gas pulse mechanism includes a nozzle, a gas pulse generator and an adjustment component. The nozzle is slidably arranged in the box body in the vertical direction. The nozzle is located above the first partition board and moves with the first partition board. The gas pulse generator is arranged on the box body and is used to fill pulse gas into the cloth bag through the nozzle. The adjustment component is used to control the amount of gas that the nozzle can eject according to the distance that the nozzle slides downward, and make the amount of gas ejected by the nozzle be positively correlated with the length of the distance that the nozzle slides downward.

[0007] Preferably, a sleeve and a second partition board are arranged in the box body. The sleeve is fixedly installed on the lower surface of the first partition board and sleeved on the cloth bag. The second partition board is fixedly installed in the box body and is located below the first partition board. A through hole is opened on the second partition board. The sleeve and the cloth bag pass through the through hole, and the diameter of the through hole is larger than the diameter of the sleeve.

[0008] Preferably, the adjustment component includes a transmission part, a distance sensor, a sliding ring and a rubber sleeve. The transmission part can control the distance between the nozzle and the cloth bag to be always consistent according to the change of the distance between the first partition board and the second partition board. The distance sensor is arranged between the first partition board and the second partition board and is used to detect the change of the distance between the first partition board and the second partition board. Through holes penetrating the nozzle are arranged on the circumferential surface of the nozzle, and the through holes extend in the vertical direction. The sliding ring is arranged on the box body and sleeved on the nozzle. The sliding ring can slide relative to the nozzle in the vertical direction. The rubber sleeve is sleeved on the nozzle. The rubber sleeve sleeved on the nozzle covers the nozzle and covers a part of the through holes. One end of the rubber sleeve is fixedly connected to the nozzle, and the other end of the rubber sleeve is turned outwards and fixedly connected to the sliding ring.

[0009] Preferably, the transmission part includes an electric push rod and a sliding rod. The electric push rod is fixedly installed on the box body and can stretch and contract in the vertical direction. The sliding rod is arranged in the box body, and the end of the sliding rod is connected to the end of the electric push rod that can stretch and contract. A branch pipe is arranged on the sliding rod. The branch pipe is communicated with the gas pulse generator through a hose. The nozzle is arranged on the branch pipe and is communicated with the branch pipe.

[0010] Preferably, a telescopic rod is fixedly installed at the top of the box body. The telescopic rod can be telescoped in the vertical direction. One end of the telescopic rod that can be telescoped is fixedly connected to the sliding ring. A second spring is arranged inside the telescopic rod. The second spring is a tension spring. When the nozzle still moves downward after the rubber sleeve covering the nozzle is completely turned outwards, the nozzle can pull the telescopic rod to extend through the rubber sleeve.

[0011] Preferably, a sealing plate is arranged inside the box body. The sealing plate is located between the cloth bag and the air inlet. The upper surface of the sealing plate is connected to the second partition board. The two side surfaces of the sealing plate are respectively connected to the inner wall of the box body. The lower surface of the sealing plate is located below the cloth bag.

[0012] Preferably, a material guiding shell is arranged at the bottom of the box body. The material guiding shell is funnel-shaped. A collecting box is arranged at the bottom of the material guiding shell.

[0013] Preferably, wheels are arranged at the bottom of the collecting box.

[0014] Preferably, a door panel is arranged on the box body. The door panel is located below the first partition board. Opening the door panel can observe the usage condition of the cloth bag.

[0015] Preferably, an air extraction mechanism is arranged at the position of the air outlet. A pressure sensor is arranged in the cavity above the first partition board, which is used to judge the degree of blockage of the cloth bag according to the change of the pressure in the cavity above the first partition board.

[0016] The beneficial effects of the present invention are as follows: A first partition board that can slide in the vertical direction is arranged. After the nozzle fills the cloth bag with gas, the cloth bag will drive the first partition board to slide downward under the impact force, reducing the instantaneous tension received at the connection position between the cloth bag and the first partition board, and prolonging the service life of the cloth bag. A first spring is arranged to further improve the buffering effect on the cloth bag and enable the first partition board to reset at the same time. When more impurities adhere to the surface of the cloth bag, the amount of gas ejected by the nozzle passing through the cloth bag will decrease, the impact force received by the cloth bag will increase, and the distance that the cloth bag drives the first partition board to move downward will increase. An adjusting component is arranged. The greater the distance that the nozzle moves downward with the first partition board, the greater the amount of gas ejected by the nozzle, and the further the impact on the cloth bag increases, so the cleaning effect on the cloth bag is better. As the impurities on the cloth bag are removed, the amount of pulsed gas passing through the cloth bag increases, the distance that the cloth bag moves downward decreases, the amount of pulsed gas ejected from the nozzle subsequently decreases, and the impact force of the pulsed gas on the cloth bag decreases, avoiding the service life of the cloth bag being reduced due to being subjected to a large impact for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a filtering device for waste incineration exhaust gas provided by an embodiment of the present invention;

[0018] Figure 2 is a top view of a filtering device for waste incineration exhaust gas provided by an embodiment of the present invention;

[0019] Figure 3 is Figure 2 a sectional view taken along the A-A direction in

[0020] Figure 4 is Figure 3 an enlarged view at position B in

[0021] Figure 5 is Figure 3 an enlarged view at position C in

[0022] Wherein:

[0023] 100, box body; 101, first partition board; 102, cloth bag; 103, air inlet; 104, air outlet; 105, first spring; 106, sleeve; 107, second partition board; 108, first cavity; 109, second cavity; 110, through hole; 111, groove; 112, telescopic rod; 113, sealing plate; 114, supporting leg; 115, material guiding shell; 116, collection box; 117, door panel; 201, nozzle; 202, gas pulse generator; 203, sliding ring; 204, rubber sleeve; 205, electric push rod; 206, sliding rod; 207, branch pipe. Specific embodiments

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0026] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] As Figures 1 to 5 shown, a filtering device for waste incineration exhaust gas provided by an embodiment of the present invention includes a box body 100, a first partition 101, a cloth bag 102 and a gas pulse mechanism. The box body 100 is fixedly arranged. The first partition 101 is slidably arranged in the box body 100 in the vertical direction and is slidably sealed with the box body 100. The first partition 101 divides the box body 100 into upper and lower cavities. An air inlet 103 and an air outlet 104 are provided on the box body 100. The air inlet 103 communicates with the cavity below the first partition 101, and the air outlet 104 communicates with the cavity above the first partition 101. A first spring 105 that can expand and contract in the vertical direction is arranged in the box body 100. The first spring 105 connects the box body 100 and the first partition 101. The cloth bag 102 is arranged on the first partition 101 and penetrates through the first partition 101 in the vertical direction. The two cavities are communicated through the cloth bag 102. The gas pulse mechanism includes a nozzle 201, a gas pulse generator 202 and an adjustment component. The nozzle 201 is slidably arranged in the box body 100 in the vertical direction. The nozzle 201 is located above the first partition 101 and moves with the first partition 101. The gas pulse generator 202 is arranged on the box body 100 and is used to fill the cloth bag 102 with pulse gas through the nozzle 201. The adjustment component is used to control the amount of gas that the nozzle 201 can eject according to the distance that the nozzle 201 slides downward, and make the amount of gas ejected by the nozzle 201 be positively correlated with the length of the distance that the nozzle 201 slides downward.

[0028] A first partition plate 101 is provided to slide vertically. After the nozzle 201 fills the cloth bag 102 with gas, the cloth bag 102 will drive the first partition plate 101 to slide downward under the impact force, reducing the instantaneous tension at the connection position between the cloth bag 102 and the first partition plate 101 and extending the service life of the cloth bag 102. A first spring 105 is provided to further improve the buffering effect on the cloth bag 102 and at the same time enable the first partition plate 101 to reset. When there is more impurity adhesion on the surface of the cloth bag 102, the amount of gas ejected by the nozzle 201 passing through the cloth bag 102 will decrease, the impact force on the cloth bag 102 will increase, and the distance that the cloth bag 102 drives the first partition plate 101 to move downward will increase. An adjustment component is provided. The greater the distance that the nozzle 201 moves downward with the first partition plate 101, the greater the amount of gas ejected by the nozzle 201, further increasing the impact on the cloth bag 102, and thus the better the cleaning effect on the cloth bag 102. As the impurities on the cloth bag 102 are removed, the amount of pulse gas passing through the cloth bag 102 increases, the distance that the cloth bag 102 moves downward decreases, the amount of pulse gas ejected from the nozzle 201 subsequently decreases, and the impact force of the pulse gas on the cloth bag 102 decreases, avoiding the reduction of the service life of the cloth bag 102 due to long-term exposure to a large impact.

[0029] In this embodiment, a sleeve 106 and a second partition plate 107 are provided in the box body 100. The sleeve 106 is fixedly installed on the lower surface of the first partition plate 101 and sleeved on the cloth bag 102. The second partition plate 107 is fixedly installed in the box body 100 and located below the first partition plate 101. The second partition plate 107 divides the cavity below the first partition plate 101 into a first cavity 108 and a second cavity 109 in the vertical direction. The air inlet 103 is communicated with the second cavity 109. The first spring 105 is located in the first cavity 108. When the first partition plate 101 slides downward, it can compress the first spring 105. A through hole 110 is provided on the second partition plate 107. The sleeve 106 and the cloth bag 102 pass through the through hole 110, and the diameter of the through hole 110 is larger than the diameter of the sleeve 106. There are multiple cloth bags 102, and the multiple cloth bags 102 are evenly arranged on the first partition plate 101. The number of the through holes 110 and the sleeves 106 is the same as the number of the cloth bags 102 and corresponds one by one. When the difference between the diameter of the through hole 110 and the diameter of the sleeve 106 is small and the first partition plate 101 approaches the second partition plate 107, the volume of the first cavity 108 decreases, and the pressure in the first cavity 108 will increase rapidly compared with the pressure in the second cavity 109. The gas in the first cavity 108 will flow into the second cavity 109 through the gap between the through hole 110 and the sleeve 106. The gas entering the second cavity 109 has a certain initial velocity and will flow downward. At this time, the impurities flushed off the surface of the cloth bag 102 will move downward along with the airflow in the first cavity 108, reducing the influence of the impurities falling on the cloth bag 102 on the impurity content of the adjacent cloth bag 102.

[0030] The lower surface of the first partition plate 101 is provided with a groove 111. One end of the first spring 105 connected to the first partition plate 101 is arranged in the first groove 111. When the diameter of the through hole 110 is quite different from the diameter of the sleeve 106 and the first partition plate 101 approaches the second partition plate 107, the gas in the first cavity 108 can quickly pass through the through hole 110 and enter the second cavity 109. The air pressure difference between the first cavity 108 and the second cavity 109 is small, and the first partition plate 101 can relatively easily impact the second partition plate 107. After the first partition plate 101 impacts the second partition plate 107, the speed instantaneously decreases, and the impurities attached to the cloth bag 102 are more likely to fall off the cloth bag 102 under the action of inertia.

[0031] In this embodiment, the adjusting assembly includes a transmission part, a distance sensor, a sliding ring 203 and a rubber sleeve 204. The transmission part can control the distance between the nozzle 201 and the cloth bag 102 to be always consistent according to the change in the distance between the first partition plate 101 and the second partition plate 107. The distance sensor is arranged between the first partition plate 101 and the second partition plate 107 and is used to detect the change in the distance between the first partition plate 101 and the second partition plate 107. A plurality of air holes penetrating through the nozzle 201 are provided on the circumferential surface of the nozzle 201, and the plurality of air holes are evenly distributed around the circumferential surface of the nozzle 201. The gas in the nozzle 201 is ejected through the air holes, and the air holes extend in the vertical direction. The sliding ring 203 is arranged on the box body 100 and sleeved on the nozzle 201, and the sliding ring 203 can slide relative to the nozzle 201 in the vertical direction. The rubber sleeve 204 is sleeved on the nozzle 201. The rubber sleeve 204 sleeved on the nozzle 201 covers the nozzle 201 and covers a part of the air holes. One end of the rubber sleeve 204 is fixedly connected to the nozzle 201, and the other end of the rubber sleeve 204 turns outwards and is fixedly connected to the sliding ring 203. When the nozzle 201 moves downwards, it drives the rubber sleeve 204 thereon to move downwards. When the rubber sleeve 204 on the nozzle 201 moves to the bottommost position, it will turn over. The inner side of the rubber sleeve 204 becomes the outer side, and the rubber sleeve 204 covering the nozzle 201 becomes less and less, and the exposed area of the air holes on the nozzle 201 becomes more and more, and the amount of gas ejected from the nozzle 201 increases accordingly.

[0032] In this embodiment, the transmission part includes an electric push rod 205 and a sliding rod 206. The distance sensor transmits the change data of the distance between the first partition plate 101 and the second partition plate 107 detected to the control panel. The control panel controls the telescopic movement of the electric push rod 205 through a circuit control program in the prior art. The electric push rod 205 is fixedly installed on the box body 100 and can telescopically move in the vertical direction. The sliding rod 206 is horizontally arranged inside the box body 100, and the electric push rod 205 is arranged outside the box body 100. There is a sliding groove on the box body 100. The electric push rod 205 is slidably arranged in the sliding groove, and the end of the sliding rod 206 is connected to the telescopable end of the electric push rod 205. A baffle is provided at the telescopable end of the electric push rod 205. The baffle is slidably connected to the box body 100 and always covers the sliding groove to prevent the gas inside the box body 100 from flowing out through the sliding groove. There are two electric push rods 205, and the two electric push rods 205 are arranged horizontally on both sides of the box body 100. A branch pipe 207 is provided on the sliding rod 206. The branch pipe 207 is communicated with the gas pulse generator 202 through a hose. A plurality of nozzles 201 are provided on the branch pipe 207 and are respectively communicated with the branch pipe 207. The gas pulse generator 202 injects pulsed gas into the branch pipe 207 through the hose, and the pulsed gas leads to the plurality of nozzles 201 through the branch pipe 207.

[0033] In this embodiment, a telescopic rod 112 is fixedly installed on the top of the box body 100. The telescopic rod 112 telescopically moves in the vertical direction. The telescopic end of the telescopic rod 112 is fixedly connected to the sliding ring 203. A second spring is provided inside the telescopic rod 112, and the second spring is a tension spring; when the nozzle 201 continues to move downward after the rubber sleeve 204 covering the nozzle 201 is completely turned outwards, the nozzle 201 can pull the telescopic rod 112 to extend through the rubber sleeve 204 to prevent the rubber sleeve 204 from being damaged.

[0034] In this embodiment, a sealing plate 113 is provided inside the box body 100. The sealing plate 113 is located between the cloth bag 102 and the air inlet 103, and the upper surface of the sealing plate 113 is connected to the second partition plate 107. The two side surfaces of the sealing plate 113 are respectively connected to the inner wall of the box body 100. The lower surface of the sealing plate 113 is located below the cloth bag 102. The gas entering the second cavity 109 from the air inlet 103 will come below the plurality of cloth bags 102 under the guidance of the sealing plate 113, so that the impurity content attached to the surfaces of the plurality of cloth bags 102 is as consistent as possible. When using gas pulse dust removal, the dust removal effect of the plurality of cloth bags 102 is better.

[0035] In this embodiment, legs 114 are provided on the box body 100. A material guiding shell 115 is provided at the bottom of the box body 100. The material guiding shell 115 is funnel-shaped. A collection box 116 is provided at the bottom of the material guiding shell 115. The impurities falling from the cloth bag 102 fall into the collection box 116 under the guidance of the material guiding shell 115.

[0036] In this embodiment, wheels are provided at the bottom of the collection box 116 to facilitate the movement of the collection box 116.

[0037] In this embodiment, a door panel 117 is provided on the box body 100. The door panel 117 is located below the first partition 101. Opening the door panel 117 can observe the usage condition of the cloth bag 102, which is convenient for replacing the cloth bag 102 and repairing the internal structure of the box body 100.

[0038] In this embodiment, an air extraction mechanism is provided at the position of the air outlet 104. A pressure sensor is provided in the cavity above the first partition 101 to judge the degree of blockage of the cloth bag 102 according to the change of the pressure in the cavity above the first partition 101. The air extraction mechanism sucks the waste gas from the air inlet 103 into the box body 100, and then discharges it from the air outlet 104 after being filtered by the cloth bag 102. If the pressure sensor monitors a change in the pressure in the cavity above the first partition 101, it means that the cloth bag 102 is blocked. When the pressure in the cavity above the first partition 101 reaches the preset value, the air extraction mechanism stops extracting air, and the gas pulse generator 202 works.

[0039] The working principle of a waste incineration exhaust gas filtering device provided by the above embodiment is as follows:

[0040] First, start the air extraction mechanism. The air extraction mechanism sucks the waste gas after garbage combustion into the second cavity 109 through the air inlet 103. The gas in the second cavity 109 moves to the cavity above the first partition 101 after being filtered by the cloth bag 102, and then is discharged from the box body 100 through the air outlet 104.

[0041] After long-term use, impurities with a certain thickness adhere to the surface of the cloth bag 102, the ventilation volume of the cloth bag 102 decreases, and the pressure in the cavity above the first partition 101 gradually decreases under the action of the air extraction mechanism. When the pressure in the cavity above the first partition 101 reaches the preset value, the air extraction mechanism stops working, and the gas pulse generator 202 starts to start. The pulsed gas generated by the gas pulse generator 202 enters the branch pipe 207 through the hose, and the pulsed gas in the branch pipe 207 is sprayed into the corresponding cloth bag 102 through a plurality of nozzles 201. The more severely the cloth bag 102 is blocked, the greater the distance that the pulsed gas sprayed from the nozzle 201 pushes the cloth bag 102 downward, the larger the area of the air holes exposed on the nozzle 201, the larger the amount of gas sprayed from the nozzle 201, and the better the cleaning effect on the cloth bag 102.

[0042] Taking one of the nozzles 201 and its corresponding cloth bag 102 as an example, in the initial state, the amount of gas that the nozzle 201 can eject is the least. The gas ejected by the nozzle 201 impacts the cloth bag 102. The cloth bag 102 subjected to the impact drives the first partition plate 101 to compress the first spring 105 and move downward. The distance sensor transmits the distance of the downward movement of the first partition plate 101 to the control board. The control board controls the electric push rod 205 to contract. The electric push rod 205 drives the sliding rod 206 to move downward. The sliding rod 206 drives the nozzle 201 to move downward through the branch pipe 207, so that the distance between the nozzle 201 and the cloth bag 102 remains unchanged. While moving downward, the nozzle 201 drives the rubber sleeve 204 wrapped thereon to move together. At this time, the telescopic rod 112 does not expand or contract under the action of the second spring. The sliding ring 203 pulls the rubber sleeve 204 to move upward relative to the nozzle 201. The rubber sleeve 204 wrapped on the nozzle 201 turns outwards continuously, and the exposed part of the air hole becomes larger and larger. The amount of gas ejected by the nozzle 201 increases more and more, and the cleaning effect on the cloth bag 102 increases; if during the process of the nozzle 201 jetting gas, after the rubber sleeve 204 turns outwards completely, the nozzle 201 still moves downward, at this time the nozzle 201 will pull the sliding ring 203 to move synchronously through the rubber sleeve 204, and the sliding ring 203 pulls the telescopic rod 112 to extend.

[0043] With the end of the first jet of the nozzle 201, the impact on the cloth bag 102 decreases. The first spring 105 drives the first partition plate 101 to reset. The electric push rod 205 drives the nozzle 201 to move upward through the sliding rod 206. When the telescopic rod 112 resets, the sliding ring 203 moves downward relative to the nozzle 201. The nozzle 201 drives the rubber sleeve 204 to turn inwards. The turned-in rubber sleeve 204 wraps on the nozzle 201, and the nozzle 201 returns to the initial state.

[0044] Since part of the impurities on the cloth bag 102 are cleaned during the first jet of the nozzle 201, the blockage condition of the cloth bag 102 is alleviated. When the nozzle 201 jets gas for the second time, the maximum distance for pushing the cloth bag 102 to move downward is shorter than that of the first time. The impact force on the cloth bag 102 decreases. And so on, the downward movement distance of the cloth bag 102 gradually shortens. When the gas performs backflushing on the cloth bag 102, the impact force on the cloth bag 102 can be reduced according to the blockage degree of the cloth bag 102, and the service life of the cloth bag 102 can be prolonged.

[0045] When the first partition 101 approaches the second partition 107 and the difference between the diameter of the through hole 110 on the second partition 107 and the diameter of the sleeve 106 is small, the gas in the first cavity 108 can quickly be discharged into the second cavity 109, and the flowing gas drives the impurities falling on the cloth bag 102 to move towards the material guiding shell 115 and converge into the collection shell under the guidance of the material guiding shell 115; when the first partition 101 approaches the second partition 107 and the difference between the diameter of the through hole 110 on the second partition 107 and the diameter of the sleeve 106 is large, the resistance when the first partition 101 approaches the second partition 107 is relatively reduced, and the impact force of the first partition 101 on the second partition 107 is large, causing the cloth bag 102 to vibrate, and the impurities on the cloth bag 102 are more likely to fall off.

[0046] After cleaning with pulsed gas, start the air extraction mechanism again for waste gas filtration.

[0047] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0048] The above-described embodiments merely represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A device for filtering waste gas from garbage incineration, characterized in that: include: A box body, a first partition, a cloth bag and a gas pulse mechanism, the box body is fixedly arranged, the first partition is slidably arranged in the box body along the vertical direction and is slidably sealed with the box body, the first partition divides the box body into two upper and lower cavities, and an air inlet and an air outlet are provided on the box body, the air inlet is communicated with the cavity below the first partition, and the air outlet is communicated with the cavity above the first partition; a first spring that can be extended and retracted in the vertical direction is provided in the box body, and the first spring connects the box body and the first partition; the cloth bag is arranged on the first partition and penetrates the first partition in the vertical direction, and the two cavities are communicated through the cloth bag; the gas pulse mechanism includes a nozzle, a gas pulse generator and an adjustment component, the nozzle is slidably arranged in the box body along the vertical direction, the nozzle is located above the first partition and moves with the first partition, and the gas pulse generator is arranged on the box body, and is used to fill the pulse gas into the cloth bag through the nozzle; The regulating component is used to control the amount of gas that can be sprayed from the nozzle according to the distance the nozzle slides downward, and the amount of gas sprayed from the nozzle is positively correlated with the distance the nozzle slides downward; A sleeve and a second partition are provided in the box, the sleeve is fixedly mounted on the lower surface of the first partition, and the sleeve is sleeved on the cloth bag, the second partition is fixedly mounted in the box and is located below the first partition, a through hole is opened on the second partition, the sleeve and the cloth bag pass through the through hole, and the diameter of the through hole is greater than the diameter of the sleeve; The adjustment component includes a transmission part, a distance sensor, a sliding ring and a rubber sleeve. The transmission part can control the distance between the nozzle and the cloth bag to be consistent according to the change of the distance between the first partition and the second partition. The distance sensor is arranged between the first partition and the second partition, and is used to detect the change of the distance between the first partition and the second partition; an air hole penetrating the nozzle is arranged on the circumferential surface of the nozzle, and the air hole extends in the vertical direction; the sliding ring is arranged on the box body, and the sliding ring is sleeved on the nozzle, and the sliding ring can slide in the vertical direction relative to the nozzle; the rubber sleeve is sleeved on the nozzle, and the rubber sleeve sleeved on the nozzle covers the nozzle and covers a part of the air hole, one end of the rubber sleeve is fixedly connected to the nozzle, and the other end of the rubber sleeve is turned outward and fixedly connected to the sliding ring.

2. The device for filtering waste gas from garbage incineration according to claim 1, characterized in that: The transmission part includes an electric push rod and a sliding rod. The electric push rod is fixedly installed on the box body and can be extended and retracted in the vertical direction. The sliding rod is arranged in the box body, and the end of the sliding rod is connected to the retractable end of the electric push rod. A branch pipe is provided on the sliding rod, and the branch pipe is connected to the gas pulse generator through a hose. The nozzle is arranged on the branch pipe and connected to the branch pipe.

3. The device for filtering waste gas from incineration according to claim 1, characterized in that: A telescopic rod is fixedly installed on the top of the box body, and the telescopic rod is telescopic in the vertical direction. One end of the telescopic rod is fixedly connected to the sliding ring. A second spring is arranged inside the telescopic rod, and the second spring is a tension spring. When the rubber sleeve covering the nozzle is completely turned outward and the nozzle still moves downward, the nozzle can pull the telescopic rod to extend through the rubber sleeve.

4. The device for filtering waste incineration exhaust gas according to claim 1, characterized in that: A sealing plate is provided in the box body, the sealing plate is located between the cloth bag and the air inlet, the upper surface of the sealing plate is connected to the second partition plate, the two side surfaces of the sealing plate are respectively connected to the inner wall of the box body, and the lower surface of the sealing plate is located below the cloth bag.

5. The device for filtering waste gas from incineration according to claim 1, characterized in that: A material guiding shell is arranged at the bottom of the box body, the material guiding shell is in a funnel shape, and a collecting box is arranged at the bottom of the material guiding shell.

6. The device for filtering waste gas from incineration according to claim 5, characterized in that: The bottom of the collection box is provided with wheels.

7. The device for filtering waste gas from garbage incineration according to claim 1, characterized in that: The box body is provided with a door panel, which is located below the first partition plate. The use status of the cloth bag can be observed by opening the door panel.

8. The device for filtering waste gas from garbage incineration according to claim 1, characterized in that: An air extraction mechanism is provided at the air outlet, and an air pressure sensor is provided in the cavity above the first partition plate, which is used to judge the blockage degree of the cloth bag according to the pressure change in the cavity above the first partition plate.

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