A cloth bag type dust collector

Abstract

The application relates to the dust removal technical field, in particular to a bag type dust collector, which comprises a dust removal box, dust removal bags, an adjusting unit and a back blowing unit. The dust removal bags are arranged in the dust removal box. The upper end of each dust removal bag is provided with a vertical guide cylinder fixedly connected with a partition plate. The adjusting unit corresponds to each dust removal bag and comprises a supporting cylinder, a baffle, a sliding cylinder and a one-way component. The baffle is arranged below the guide cylinder and defines an air inlet channel together with the guide cylinder. The cooperation of the baffle and the one-way component enables the dust removal bag to trigger the baffle to move and close the air inlet channel when the dust removal bag is damaged, so that the unfiltered flue gas in the dust removal bag is prevented from escaping. When multiple dust removal bags are used simultaneously, the normal work of other dust removal bags is not affected, and the dust removal bags do not need to be replaced during shutdown. The baffle can also temporarily close the air inlet channel of the undamaged dust removal bag when the back blowing unit blows back, thereby reducing the backflow of the back blowing gas and improving the utilization rate of the back blowing gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust removal, in particular to a bag-type dust collector. BACKGROUND

[0002] As a kind of efficient and reliable flue gas purification equipment, bag-type dust collector is widely used in metallurgy, chemical industry, power, building material and other industrial fields. Its core working principle is to use filter bag made of fiber fabric to filter dust-containing gas. When dust-containing gas passes through dust removal bag, dust is blocked on the outer surface of filter bag, and the purified gas enters clean gas chamber and is discharged. However, as the core filter element, dust removal bag is inevitably worn, ablated or corroded under the harsh working conditions of high temperature, high humidity, corrosion and airflow scouring. When single or multiple filter bags are damaged, dust-containing flue gas will directly enter the clean gas chamber through the broken hole without filtration, resulting in emission concentration exceeding the standard and failure of the whole dust removal system. At present, operators often need to find damaged filter bags by observing abnormal increase of emission concentration or regularly opening the box for inspection. This process has serious lag, and after the damage is found, the replacement must be carried out after shutdown. For large-scale industrial production systems that need continuous operation, such unscheduled shutdown will bring huge economic loss. SUMMARY

[0003] The present application provides a bag-type dust collector to solve the problem that individual dust removal bag damage affects the overall dust removal quality and efficiency in the prior art.

[0004] The bag-type dust collector of the present application adopts the following technical scheme:

[0005] The utility model provides a cloth bag type dust catcher, including dust catcher, dust cloth bag, adjusting unit and blowback unit, be provided with the baffle in dust catcher, the baffle divides the dust catcher into upper chamber and lower chamber, dust cloth bag has a plurality of, all set up in lower chamber, and its lower end is blocked, and the upper end is open and passes through the baffle and makes its inside with upper chamber intercommunication, the upper end of dust cloth bag is provided with the vertical guide cylinder with the fixed connection of baffle, adjusting unit with dust cloth bag one to one corresponds, including support cylinder, baffle, sliding cylinder and one way component, support cylinder is vertical and is fixed in upper chamber, and is located in the inside of guide cylinder, baffle is located below support cylinder and can move up and down relative to guide cylinder and is connected between support cylinder through elastic member, in initial state, baffle is located below guide cylinder and is spaced apart with guide cylinder, the flue gas with pressure enters from lower chamber, passes through dust cloth bag and is filtered and passes through the air inlet channel defined between baffle and guide cylinder after and is discharged from upper chamber, when dust cloth bag breaks, the flue gas with pressure pushes baffle and moves up and is attached to the inner wall of guide cylinder and blocks the air inlet channel, sliding cylinder is connected with baffle and is installed in the inside of support cylinder and is connected with support cylinder through one way component, when dust cloth bag breaks, baffle moves up and blocks the air inlet channel, one way component hinders sliding cylinder and moves down, in turn hinders baffle and moves down, and when blowback unit is through sliding cylinder and blows gas and recoils in dust cloth bag, allow baffle in the dust cloth bag that has not broken to move up first and then move down under the action of elastic member and open the air inlet channel.

[0006] Further, the one-way component includes a one-way rack, fixed teeth, and movable teeth. The fixed teeth are arranged on the upper end of the sliding cylinder, a groove is arranged on the outer circumferential wall of the upper end of the sliding cylinder and below the fixed teeth, and the movable teeth are arranged in the groove in a sliding manner. The one-way rack extends along the axial direction of the sliding cylinder and is arranged between the support cylinder and the sliding cylinder in a radially elastic manner. The upper end surface of the teeth of the one-way rack is a flat surface, and the lower end surface is an inclined surface. The lower end surface of the fixed teeth is a flat surface, and the upper end surface is an inclined surface parallel to the lower end surface of the teeth. The upper end surface of the movable teeth is a flat surface, and the lower end surface is an inclined surface opposite to the inclined direction of the lower end surface of the teeth. When the sliding cylinder moves upward, the fixed teeth and the inclined surface of the teeth of the one-way rack cooperate to push the one-way rack to avoid, thereby allowing the sliding cylinder to move upward, and the teeth of the one-way rack and the flat surface of the fixed teeth abut to hinder the sliding cylinder from moving downward. When the sliding cylinder moves upward to the upper side of the uppermost tooth of the one-way rack, the flat surface of the upper end of the movable teeth abuts with the flat surface of the lower end of the fixed teeth, and the inclined surface of the lower end of the movable teeth abuts with the teeth of the one-way rack to push the one-way rack to avoid, thereby allowing the sliding cylinder to move downward to the initial position.

[0007] Further, the adjusting unit further comprises an adjusting cone fixed in the supporting cylinder, the lower end of the adjusting cone can extend into the sliding cylinder, and the upper end of the part of the adjusting cone in the supporting cylinder is thick and the lower end is thin; after each back flushing, the flue gas with pressure enters the dust removal bag again, the distance of the push block moving upward is positively correlated with the air permeability of the dust removal bag and negatively correlated with the size of the back flushing channel defined between the adjusting cone and the sliding cylinder.

[0008] Further, the sliding cylinder is provided with a one-way valve allowing gas to enter the dust removal bag from the sliding cylinder.

[0009] Further, the dust removal bag is provided with a supporting framework connected with the guide cylinder.

[0010] Further, the plurality of dust removal bags are distributed in a matrix in the lower chamber.

[0011] Further, the back flushing unit comprises a gas pump and a plurality of branch pipes in communication with the gas pump, each branch pipe is in communication with the supporting cylinder of one row or one column of adjusting units.

[0012] Further, the side wall of the dust removal box is provided with an air inlet in communication with the lower chamber and an air outlet in communication with the upper chamber.

[0013] Further, the bottom of the dust removal box is provided with a dust collecting hopper in communication with the lower chamber.

[0014] Further, the guide cylinder is provided with a limiting block, the push block is provided with a guide rod in sliding cooperation with the limiting block, and the limiting block limits the limit position of the push block moving upward.

[0015] The beneficial effects of the present application are: the bag type dust collector of the present application is provided with a push block and a one-way assembly, so that when the dust removal bag is damaged, the pressure of the flue gas flow triggers the push block to move and close the air inlet channel, preventing the unfiltered flue gas in the dust removal bag from escaping, and when multiple dust removal bags are used at the same time, it does not affect the normal work of other dust removal bags and does not need to be replaced. Further, the push block can also temporarily close the air inlet channel of the undamaged dust removal bag when the back flushing unit blows back, reducing the back flow of the back flushing gas, improving the utilization rate of the back flushing gas, and further improving the back flushing effect.

[0016] Further, by setting the adjusting cone, the back flushing gas flow in different dust removal bags is adjusted, so that the back flushing gas flow is reasonably distributed in multiple dust removal bags, as much as possible to blow to the dust removal bag with more serious blockage, and further improve the overall cleaning effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the bag filter of the present invention;

[0019] Figure 2 This is a front view of the overall structure of an embodiment of the bag filter of the present invention;

[0020] Figure 3 for Figure 2 Schematic diagram of cross section along the AA direction;

[0021] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0022] Figure 5 This is a schematic diagram of the structure of the dust collector bag and the regulating unit in an embodiment of the bag filter of the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0024] Figure 7 for Figure 6 Enlarged diagram of point D in the middle.

[0025] In the diagram: 100, dust collector box; 110, partition; 120, air inlet; 130, air outlet; 140, dust collection hopper; 200, dust collector bag; 210, guide cylinder; 211, limiting block; 220, support frame; 310, support cylinder; 320, baffle; 321, guide rod; 322, elastic element; 330, sliding cylinder; 331, valve plate; 340, one-way assembly; 341, one-way rack; 342, fixed tooth; 343, movable tooth; 350, adjusting cone; 400, backflushing unit; 410, air pump; 420, branch pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] An embodiment of a cloth bag type dust collector of the present application, as shown in Figures 1 to 7 includes a dust removal box 100, a dust removal cloth bag 200, an adjusting unit and a back flushing unit 400.

[0028] A partition plate 110 is arranged in the dust removal box 100, which separates the dust removal box 100 into an upper chamber and a lower chamber, and a communication port is formed in the partition plate 110 to communicate the upper chamber and the lower chamber.

[0029] The dust removal cloth bag 200 is provided in multiple numbers and arranged in the lower chamber, and its lower end is blocked, its upper end is open and penetrates through the partition plate 110 so that its interior communicates with the upper chamber through the communication port; the upper end of the dust removal cloth bag 200 is provided with a vertical guide cylinder 210 fixedly connected with the partition plate 110, which is located in the inner circle of the dust removal cloth bag 200 and blocked between the dust removal cloth bag 200.

[0030] The adjusting unit corresponds to the dust removal cloth bag 200 one by one, which includes a support cylinder 310, a baffle 320, a sliding cylinder 330 and a one-way assembly 340; the support cylinder 310 is vertical and fixed in the upper chamber and located inside the guide cylinder 210; the baffle 320 is located below the support cylinder 310 and can move up and down relative to the guide cylinder 210 and connected with the support cylinder 310 through an elastic member 322. Specifically, a limiting block 211 is arranged in the guide cylinder 210, and a guide rod 321 slidingly matched with the limiting block 211 is arranged on the baffle 320, and the limiting block 211 limits the limit position of the baffle 320 moving upward.

[0031] In the initial state, the baffle 320 is located below the guide cylinder 210 and spaced apart from the guide cylinder 210; the flue gas with pressure enters from the lower chamber, is filtered by the dust removal cloth bag 200 and then discharged from the upper chamber through the gas inlet passage defined between the baffle 320 and the guide cylinder 210. When the dust removal cloth bag 200 is damaged, the flue gas with pressure pushes the baffle 320 to move upward and abut against the inner wall of the guide cylinder 210 to block the gas inlet passage; the sliding cylinder 330 is connected with the baffle 320 and slidingly installed inside the support cylinder 310 and connected with the support cylinder 310 through the one-way assembly 340. The one-way assembly 340 hinders the sliding cylinder 330 from moving downward when the baffle 320 moves upward by a first preset distance to block the gas inlet passage due to the damage of the dust removal cloth bag 200, thereby hindering the baffle 320 from moving downward, and allows the baffle 320 in the dust removal cloth bag 200 which is not damaged to move upward by a second preset distance first and then move downward under the action of the elastic member 322 to open the gas inlet passage when the back flushing unit 400 blows gas back into the dust removal cloth bag 200 through the sliding cylinder 330, wherein the second preset distance is greater than the first preset distance.

[0032] In use, the flue gas can be sent to the lower chamber by a pressurized pump, or the upper chamber is connected to a suction pump, so that the flue gas enters the lower chamber with a certain pressure. After the flue gas enters the lower chamber, the impurities are intercepted outside the dust removal bag 200, and the filtered flue gas enters the upper chamber through the communication port at the upper end of the dust removal bag 200 and is discharged. The flue gas with pressure will push the baffle 320 to move upward, due to the resistance of the dust removal bag 200, the baffle 320 will not move upward or have a small moving range, and will not cause the blockage of the air inlet channel. When the dust removal bag 200 is damaged, the resistance to flue gas is greatly reduced, the flue gas pushes the baffle 320 to move upward by a first preset distance and is attached to the guide cylinder 210, blocking the air inlet channel, and the one-way assembly 340 prevents the sliding cylinder 330 from moving downward, thereby preventing the baffle 320 from moving downward, avoiding the air inlet channel from being opened again, and allowing unfiltered flue gas to escape. When the dust removal bag 200 is not damaged, as the use time accumulates, the outer surface of the dust removal bag 200 is blocked by dust and needs to be cleaned regularly. When cleaning, the air inlet needs to be stopped first, and the back blowing unit 400 ventilates the inside of the dust removal bag 200 through the sliding cylinder 330. Due to the blockage of the dust removal bag 200, the gas blown by the back blowing unit 400 causes the internal pressure of the dust removal bag 200 to rise, pushing the baffle 320 to move upward to close the air inlet channel and prevent the backflow of the backflow gas, and the one-way assembly 340 allows the baffle 320 to move upward by a second preset distance and then move downward under the action of the elastic member 322 to reset. After back blowing, it does not affect the normal flow of the flue gas. The damaged dust removal bag 200 will not further increase the internal pressure when it is backflushed, and the baffle 320 will not further move upward, so the air inlet channel can always remain closed.

[0033] The baffle 320 is similar in structure to the pressure valve in the prior art. When the dust removal bag 200 is not damaged, it has resistance to the flue gas, so that the flue gas with pressure is not enough to push the baffle 320 to close the air inlet channel. When the dust removal bag 200 is damaged, the pressure of the flue gas pushes the baffle 320 to close.

[0034] By setting the baffle 320 and the one-way assembly 340, when the dust removal bag 200 is damaged, the pressure of the flue gas flow triggers the baffle 320 to move to close the air inlet channel, preventing the unfiltered flue gas in the dust removal bag 200 from escaping. When multiple dust removal bags 200 are used at the same time, it does not affect the normal work of other dust removal bags 200, and there is no need to stop and replace. Further, the baffle 320 can also temporarily close the air inlet channel of the undamaged dust removal bag 200 when the back blowing unit 400 blows back, reducing the backflow of the backflow gas, improving the utilization rate of the back blowing gas, and further improving the backflushing effect.

[0035] In the embodiment, the one-way assembly 340 comprises a one-way rack 341, fixed teeth 342 and movable teeth 343. The fixed teeth 342 are arranged on the upper end of the sliding cylinder 330. A groove is arranged on the outer circumferential wall of the upper end of the sliding cylinder 330 below the fixed teeth 342. The movable teeth 343 are arranged in the groove in a sliding manner. The one-way rack 341 extends along the axial direction of the sliding cylinder 330 and is elastically installed on the support cylinder 310 in a radial direction between the support cylinder 310 and the sliding cylinder 330. The upper end surface of the teeth of the one-way rack 341 is a plane, and the lower end surface is an inclined surface. The lower end surface of the fixed teeth 342 is a plane, and the upper end surface is an inclined surface parallel to the lower end surface of the teeth. The upper end surface of the movable teeth 343 is a plane, and the lower end surface is an inclined surface opposite to the inclined direction of the lower end surface of the teeth. When the sliding cylinder 330 moves upward, the fixed teeth 342 and the inclined surface of the teeth of the one-way rack 341 cooperate to push the one-way rack 341 to avoid, thereby allowing the sliding cylinder 330 to move upward, and the teeth of the one-way rack 341 and the plane of the fixed teeth 342 abut to block the sliding cylinder 330 from moving downward. When the sliding cylinder 330 moves upward to the uppermost tooth of the one-way rack 341, the plane of the upper end of the movable teeth 343 and the plane of the lower end of the fixed teeth 342 are in close contact, and the inclined surface of the lower end of the movable teeth 343 and the teeth of the one-way rack 341 abut to push the one-way rack 341 to avoid, thereby allowing the sliding cylinder 330 to move downward to the initial position. In the initial state, the fixed teeth 342 and the lowermost tooth of the one-way rack 341 cooperate. The first preset distance is less than the distribution length of the teeth of the one-way rack 341, and the second preset distance is greater than the distribution length of the teeth of the one-way rack 341. That is, by reasonably configuring the flow pressure of the flue gas, when the dust cloth bag 200 is damaged, the baffle 320 moves under the pushing of the flue gas, and the amplitude does not exceed the distribution length of the teeth of the one-way rack 341, so as to ensure that the baffle 320 can keep the air inlet channel blocked. By reasonably configuring the backflush gas pressure of the backflush unit 400, when the dust cloth bag 200 is not damaged, the baffle 320 can move upward to the position above the teeth of the one-way rack 341 under the pushing of the gas in the dust cloth bag 200, thereby moving downward to reset when the gas blowing is stopped.

[0036] In the embodiment, the adjusting unit further comprises an adjusting cone 350 fixed in the supporting cylinder 310, the lower end of the adjusting cone 350 can extend into the sliding cylinder 330, and the part of the adjusting cone 350 in the supporting cylinder 310 is thick at the upper end and thin at the lower end. After each back flushing, the flue gas with pressure enters the dust cloth bag 200 again, the distance of the upward movement of the pushing baffle 320 is positively correlated with the air permeability of the dust cloth bag 200 and negatively correlated with the size of the back flushing channel defined between the adjusting cone 350 and the sliding cylinder 330. Specifically, because the plugging degrees of each dust cloth bag 200 are different, the air permeability of the dust cloth bag 200 is also different after the first back flushing, the more serious the plugging of the dust cloth bag 200 is, the lower the air permeability is, the greater the resistance to the flue gas flow is, the shorter the distance of the upward movement of the flue gas pushing baffle 320 is, and the wider the back flushing channel between the adjusting cone 350 and the sliding cylinder 330 is, and the greater the air flow into the dust cloth bag 200 is during the next back flushing of the dust cloth bag 200, and the better the back flushing effect is. On the contrary, the lighter the plugging of the dust cloth bag 200 is, the higher the air permeability is, the smaller the resistance to the flue gas flow is, the longer the distance of the upward movement of the flue gas pushing baffle 320 is, the narrower the back flushing channel between the adjusting cone 350 and the sliding cylinder 330 is, and the smaller the air flow into the dust cloth bag 200 is during the next back flushing of the dust cloth bag 200. By setting the adjusting cone 350, the back flushing air flow into different dust cloth bags 200 is adjusted, the back flushing air flow is reasonably distributed in the plurality of dust cloth bags 200, as much as possible, the back flushing air flow is blown to the dust cloth bags 200 with more serious plugging, and then the overall cleaning effect is improved.

[0037] In the embodiment, the sliding cylinder 330 is provided with a one-way valve allowing the gas to enter the dust cloth bag 200 from the sliding cylinder 330; specifically, the one-way valve can be a pressure valve commonly used in the prior art, or a valve plate 331 is adopted in the embodiment. Figure 4

[0038] In the embodiment, the dust cloth bag 200 is provided with a supporting framework 220 connected with the guide cylinder 210, and the supporting framework 220 is used to keep the dust cloth bag 200 in an unfolded state.

[0039] In the embodiment, the plurality of dust cloth bags 200 are arranged in a matrix in the lower chamber.

[0040] In the embodiment, the back flushing unit 400 comprises a gas pump 410 and a plurality of branch pipes 420 in communication with the gas pump 410, each branch pipe 420 is in communication with the supporting cylinder 310 of one row or one column of adjusting units.​

[0041] In the embodiment, the side wall of the dust removal box 100 is provided with an air inlet 120 communicated with the lower chamber and an air outlet 130 communicated with the upper chamber. An air supply pump is connected to the air inlet 120 or a suction pump is connected to the air outlet 130, so that the flue gas enters the lower chamber with a certain pressure.

[0042] In the embodiment, the bottom of the dust removal box 100 is provided with a conical dust collecting hopper 140 communicated with the lower chamber, and the bottom of the dust collecting hopper 140 is provided with a valve for discharging dust.

[0043] In use, the bag-type dust collector of the present application has flue gas with pressure entering the lower chamber from the air inlet 120, and after being filtered by the dust removal bag 200, the flue gas enters the inside of the dust removal bag 200, and then flows to the upper chamber through the air inlet passage between the baffle 320 and the guide cylinder 210, and is discharged from the air outlet 130. When an individual dust removal bag 200 is damaged, the resistance to the flue gas is greatly reduced, the flue gas pushes the baffle 320 to move upward by a first preset distance and abuts against the guide cylinder 210 to block the air inlet passage, the teeth of the fixed tooth 342 and the one-way rack 341 are matched to hinder the sliding cylinder 330 from moving downward, thereby hindering the baffle 320 from moving downward, avoiding the air inlet passage from being opened again, and preventing the unfiltered flue gas from escaping. Other undamaged dust removal bags 200 need to be cleaned regularly as the use time accumulates, and the outer surfaces of the dust removal bags 200 are blocked by dust. During the cleaning, the air inlet needs to be stopped first, and the back-blowing unit 400 ventilates the inside of the dust removal bag 200 through the sliding cylinder 330. Since the dust removal bag 200 is blocked, the gas blown by the back-blowing unit 400 causes the air pressure in the inside of the dust removal bag 200 to rise, the baffle 320 is pushed upward by a second preset distance and closes the air inlet passage, and the backflow of the back-blowing gas is hindered. After the baffle 320 moves upward by the second preset distance, the movable tooth 343 is located above all the teeth of the one-way rack 341, the baffle 320 moves downward under the action of the elastic member 322, the movable tooth 343 pushes the one-way rack 341 to avoid, and then the baffle 320 is allowed to move downward and reset. After the back-blowing gas, the normal flow of the flue gas is not affected. The damaged dust removal bag 200 does not further increase the internal pressure when subjected to the back-blowing gas, and the baffle 320 does not further move upward, so that the air inlet passage can always be closed. Then, the air pump 410 is closed, and the flue gas continues to be introduced for dust removal.

[0044] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A baghouse dust collector, characterized in that, Includes a dust collection box, dust collection bags, regulating unit, and back-flushing unit; The dust collector is equipped with a partition that divides the interior of the dust collector into an upper chamber and a lower chamber. There are multiple dust collector bags, all located in the lower chamber, with their lower ends sealed and their upper ends open and passing through a partition to connect their interiors to the upper chamber; the upper end of the dust collector bag is provided with a vertical guide tube that is fixedly connected to the partition. The adjustment unit corresponds one-to-one with the dust collector bag and includes a support cylinder, a baffle, a sliding cylinder and a one-way assembly. The support cylinder is vertical and fixed in the upper chamber and is located inside the guide cylinder. The baffle is located below the support cylinder and can move up and down relative to the guide cylinder and is connected to the support cylinder through an elastic element. Initially, the baffle is located below the guide cylinder and spaced apart from it. Pressurized flue gas enters from the lower chamber, is filtered by the dust collector bag, and then exits from the upper chamber through the air inlet channel defined between the baffle and the guide cylinder. When the dust collector bag is damaged, the pressurized flue gas pushes the baffle upward to fit against the inner wall of the guide cylinder and block the air inlet channel. The sliding cylinder is connected to the baffle and is slidably installed inside the support cylinder and connected to the support cylinder through a one-way component. When the dust collector bag is damaged and the baffle moves upward to block the air inlet channel, the one-way component prevents the sliding cylinder from moving downward, thus preventing the baffle from moving downward. When the backflushing unit blows air into the dust collector bag through the sliding cylinder, it allows the baffle inside the undamaged dust collector bag to move upward first and then move downward under the action of the elastic element to open the air inlet channel.

2. The bag filter according to claim 1, characterized in that, The unidirectional assembly includes a unidirectional rack, fixed teeth, and movable teeth. The fixed teeth are located at the upper end of the sliding cylinder, and a groove is formed on the outer peripheral wall of the upper end of the sliding cylinder below the fixed teeth. The movable teeth are slidably disposed in the groove. The unidirectional rack extends axially along the sliding cylinder and is elastically and retractably mounted on the support cylinder and located between the support cylinder and the sliding cylinder. The upper end face of the teeth on the unidirectional rack is flat, and the lower end face is inclined. The lower end face of the fixed teeth is flat, and the upper end face is inclined parallel to the lower end face of the teeth. The upper end face of the movable teeth is flat, and the lower end face is inclined parallel to the lower end face of the teeth. Inclined surfaces in opposite directions; when the sliding cylinder moves upward, the inclined surfaces of the fixed teeth and the teeth of the one-way rack engage to push the one-way rack aside, thus allowing the sliding cylinder to move upward, and the plane of the teeth of the one-way rack abuts against the plane of the fixed teeth to prevent the sliding cylinder from moving downward; when the sliding cylinder moves upward to the upper side of the uppermost tooth of the one-way rack, the plane of the upper end of the movable tooth fits against the plane of the lower end of the fixed tooth, and the inclined surface of the lower end of the movable tooth abuts against the teeth of the one-way rack to push the one-way rack aside, thus allowing the sliding cylinder to move downward back to the initial position.

3. The bag filter according to claim 1, characterized in that, The adjustment unit also includes an adjustment cone fixed inside the support cylinder. The lower end of the adjustment cone can extend into the sliding cylinder, and the part of the adjustment cone inside the support cylinder is thicker at the upper end and thinner at the lower end. After each backflushing, the pressurized flue gas re-enters the dust collector bag. The distance the push baffle moves upward is positively correlated with the air permeability of the dust collector bag and negatively correlated with the size of the backflushing channel defined between the adjustment cone and the sliding cylinder.

4. The bag filter according to claim 1, characterized in that, The sliding cylinder is equipped with a one-way valve that allows gas to enter the dust collector bag from the sliding cylinder.

5. The bag filter according to claim 1, characterized in that, The dust collector bag is equipped with a support frame, which is connected to the guide cylinder.

6. The bag filter according to claim 1, characterized in that, Multiple dust collector bags are arranged in a matrix in the lower chamber.

7. The bag filter according to claim 6, characterized in that, The backflush unit includes an air pump and multiple branch pipes connected to the air pump. Each branch pipe is connected to the support cylinder of a row or column of adjustment units.

8. The bag filter according to claim 1, characterized in that, The side wall of the dust collector has an air inlet that communicates with the lower chamber and an air outlet that communicates with the upper chamber.

9. The bag filter according to claim 1, characterized in that, The bottom of the dust collector is equipped with a dust collection hopper that connects to the lower chamber.

10. The bag filter according to claim 1, characterized in that, A limit block is provided inside the guide cylinder, and a guide rod that slides with the limit block is provided on the baffle. The limit block restricts the baffle from moving upward to its extreme position.

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