CN114159907B - Staggered filtration-end filtration composite dust removal system and control method thereof - Google Patents

Abstract

The invention relates to the technical field of dust removal, in particular to a staggered filtration-end filtration composite dust removal system and a control method thereof, which are suitable for a composite dust removal system and comprise a box body, wherein four spaces of an air inlet chamber, a staggered filtration chamber, an end filtration chamber and a clean room are sequentially arranged in the box body according to the flow direction of main airflow, and meanwhile, the staggered filtration chamber is connected with the clean room, so that the staggered filtration chamber and the end filtration chamber play a role of filtering and removing dust in parallel, the problem of overlarge ventilation of the end filtration chamber can be effectively solved, and the filtration resistance of an end filtration type filter cylinder is reduced; the design of a movable dust removing ring is adopted for replacing pulse spraying dust removing action of a staggered filtering chamber, dust removing is carried out on staggered filtering type filtering cylinders by using dust-containing airflow, and air consumption of an air bag is greatly reduced; the staggered filtration-end filtration composite dust removal system provided by the invention integrates multiple functions, is reasonable in structure, saves space and energy consumption, is skillfully designed, enables the dust removal systems to work in parallel, and greatly reduces the filtration resistance of the dust removal systems.

Description

Misfilter-end filter compound dust removal system and its control method

technical field

The invention relates to the technical field of dust removal, in particular to a misfiltration-end filter composite dust removal system and a control method thereof.

Background technique

For a long time, the occupational hazards of industrial dust in my country have been serious, involving coal mining, metallurgy, chemical industry, building materials and many other industries and departments, posing a serious threat to the lives and health of employees.

Filtration and dust removal technology is efficient, stable, reliable, economical and practical in dust control, and has been widely used in the field of dust control. At present, the filter and dust removal used in industrial production is generally in the form of end-flow filtration, that is, to block the dust and let the wind flow through it. The treatment effect on the dusty gas with large air volume is not good, and the running resistance is too large. Even if a composite dust removal system with first-level coarse effect and second-level high efficiency (such as gravity-filtration, cyclone-filtration, electrostatic-filtration, etc.) is adopted, all the air volume still needs to pass through the filter dust removal module, and the problem of large operating resistance cannot be effectively solved. solve.

The national patent CN112473309A discloses a composite dust collection system with cross-flow filtration. The cross-flow filter layer is set in the space of the air duct, and part of the clean air is diverted from the cross-filter air duct in advance. This part of the air flow directly leads to the fan, reducing The processing air volume of the filter dust collector is increased, which can effectively reduce the overall running resistance. However, there are many components in this system, the system is relatively complex, and it is not easy to cooperate and control all links.

Contents of the invention

In view of the deficiencies in the prior art, the present invention provides a misfiltration-end filtration composite dust removal system and its control method. Through the design of the misfiltration-end filtration integrated composite dust removal system, the dust can be separated in the misfiltration chamber in one stage, and Part of the clean air flow is diverted directly to the clean room, which effectively reduces the air volume passing through the end filter cartridge of the secondary separation and purification system. Compared with ordinary filter and dust removal systems, it can significantly reduce the overall running resistance.

The technical solution of the present invention is: a wrong filter-end filter composite dust removal system, including a box body, and the inside of the box body is sequentially provided with four spaces: an air intake room, a wrong filter room, an end filter room and a clean room according to the flow direction of the main body of air;

The air intake chamber is formed by the middle partition, the upper flower plate and the inner wall of the box, and the air intake pipe is installed on the right side wall of the air intake chamber;

The wrong filter room is formed by the middle partition board, the upper flower plate, the lower flower plate and the inner wall of the box. There are several wrong filter cartridges in the wrong filter chamber, and the wrong filter cartridges are installed on the upper flower plate and the lower flower plate. Between the plates, a dust removal ring is set on the outside of the wrong filter cartridge, the bottom end of the dust removal ring is connected to the outer end of the telescopic rod of the telescopic cylinder, and the bottom of the telescopic cylinder is provided with an air hole connected to the end of the air pipe II , the other end of the trachea II is connected to the air bag and a valve K2 is installed on the trachea II, and the valve K2 is electrically connected to the controller;

The end filter chamber is formed by the middle partition, the lower flower plate, the flower plate and the inner wall of the box. There are several end filter cartridges in the end filter chamber, and the end filter cartridges are suspended and installed under the flower plate. Its top opening corresponds to the opening position in the middle of the flower plate;

The clean room is formed by the middle partition, the flower plate and the inner wall of the box. There are nozzles, pulse valves and blowing pipes in the clean room. The nozzles are installed on the blowing pipes through the pulse valves. The opening of the nozzles is directly opposite to the end filter cartridge. The top is open, the spray pipe is connected to the air bag, and the air bag is connected to the air compressor through the air pipe I. The valve K1 is installed on the air pipe I. The valve K1 and the pulse valve are respectively electrically connected to the controller. The air outlet pipe is installed on the top of the clean room. , a fan is installed on the outlet pipe, and the fan is electrically connected to the controller;

There is an opening on the middle partition for connecting the wrong filter room with the clean room, and an air stabilizing valve is installed at the opening;

A detachable dust collection device is provided under the inner cavity of the box.

The dust-cleaning ring is provided with sliding holes for the fixed rod I and the fixed rod II to pass through, and the two ends of the fixed rod I and the fixed rod II are respectively fixed on the upper flower plate and the lower flower plate, and the telescopic cylinder is installed on the On the lower flower plate, there is an air hole at the bottom of the telescopic cylinder to connect to the air pipe II; the dust cleaning ring is driven by the telescopic cylinder to move between the upper flower plate and the lower flower plate.

The telescopic cylinder includes a cylinder body and a support rod, the support rod is fixed on the bottom of the cylinder body, and the bottom of the support rod is fixed on the lower flower plate; the cylinder body is provided with a telescopic rod and an air hole for compression The air enters from the air hole and pushes the telescopic rod up; when the pressure of the compressed air becomes smaller, the telescopic rod moves down.

The inside of the wind stabilizing valve is provided with a wind sensing plate, a connecting rod, a wind deflector, a spring, a threaded rod and a knob, and the structure of the wind sensing plate is a plane above and a convex surface below; The lower end of the threaded rod is connected to the spring, the lower end of the spring is connected to the upper end of the wind deflector, the lower end of the wind deflector is connected to the side wall of the wind sensing plate through a connecting rod, and can be adjusted by a knob The degree of compression of the spring on the windshield controls different air volume stability values.

The invention discloses a control method of a misfiltration-end filtration compound dust removal system, which includes the following steps:

S1: Start the fan and air compressor, and the dust removal system performs the dust removal operation;

S2: Ash cleaning of the wrong filter cartridge; close K1, open K2, the compressed air of the air bag is delivered to the telescopic cylinder through the air pipe II, and the telescopic cylinder drives the dust cleaning ring to move upward at a slow and uniform speed to realize the dust cleaning ring in the wrong filter cartridge The peeling of the dust cake in the corresponding coverage area;

S3: Dust cleaning of the end filter cartridge; close K2, open the pulse valve, so that the compressed gas in the air bag is sprayed out through the blowing pipe and through the nozzle, and the dust is removed from the end filter cartridge. After the dust removal of the end filter cartridge is completed , close the pulse valve;

S4: Reset the ash removal device in the wrong filter chamber; open K2, move the ash cleaning ring down to the bottom of the wrong filter cartridge, and then close K2;

S5: Supplement the pressure of the air bag; turn on K1, and the air compressor will pressurize the air bag.

Beneficial effects: 1) The integrated design of misfiltration and end filtration. The interior of the composite dust removal system is equipped with an air intake room, a wrong filter room, an end filter room and a clean room according to the flow direction of the dust-laden airflow. It can effectively solve the problems of concentrated air volume and excessive resistance in the end filter chamber, and realize the organic combination of misfiltration and end filtration.

(1) Two-stage filtration: The inner surface of the wrong filter cartridge in the wrong filter chamber can realize the separation and capture of dust (first-level purification), thereby reducing the load of the end filter cartridge in the subsequent end filter chamber; the end filter cartridge Dust can be intercepted and retained (secondary purification) to further improve the effect of gas-solid separation;

(2) The operation of the fault filter chamber is stable: the shearing effect of the downward airflow on the inner surface of the fault filter cartridge suppresses the formation of filter cake, weakens the clogging of the fault filter cartridge, and makes the running resistance in the fault filter chamber less With the progress of dust removal operation, the increase is slow, the frequency of dust removal is low, and the impact on the total resistance of the system is small;

(3) Gas shunting reduces resistance: Part of the clean air flow in the cross-filter chamber directly reaches the clean room, which can reduce the air volume load in the subsequent end filter chamber and avoid the concentration of air flow. The overall airflow resistance of the system.

(4) Control the air volume distribution through the misfilter chamber and end filter chamber through the air stabilization valve, so that the two-stage purification operation of the misfilter-end filter composite dust removal system is stable and the resistance changes as expected.

2) Low energy consumption cleaning ring design. Using compressed gas as the working medium, the power is transmitted by the pressure of the gas, so that the telescopic cylinder drives the ash cleaning ring to move on the outer wall of the wrong filter cartridge, and the radial wind flow force of the filter cake in the corresponding area is weakened by the coverage of the ash cleaning ring to reduce the filter cake Adhesion makes it peeled off under the shearing action of the downward airflow, which reduces the air consumption of the air bag compared with the pulse jet cleaning;

3) Automatic air stabilization valve. Using Bernoulli's principle, a wind sensing plate with a plane above the air stabilizing valve and a convex surface below it is designed, and the wind sensing plate is used to drive the wind deflector to control the flow section of the air stabilizing valve, realizing the automatic closed loop of the air volume and the flow section of the air stabilizing valve Negative feedback control to achieve the stability of wind flow. And the compression degree of the spring on the windshield can be adjusted through the knob, so as to control different stable values of air volume.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

Fig. 2 is a structural schematic diagram of the dust cleaning ring of the present invention.

Fig. 3 is a schematic view inside the telescopic cylinder of the present invention.

Fig. 4 is an internal schematic diagram of the steady flow valve of the present invention.

Fig. 5 is a schematic diagram of the control system of the present invention.

In the figure: 1. Box body, 2. Air inlet pipe, 3. Upper flower plate, 4. Fault filter cartridge, 5. Ash cleaning ring, 6. Fault filter chamber, 7. Telescopic cylinder, 8. Lower flower plate , 9. Ash collection device, 10. Air intake chamber, 11. Intermediate partition, 12. Wind stabilization valve, 13. Nozzle, 14. Pulse valve, 15. Injection pipe, 16. Air outlet pipe, 17. Clean room, 18. Fan, 19. Air bag, 20. Air pipe Ⅰ, 21. Controller, 22. Air compressor, 23. Flower plate, 24. End filter chamber, 25. End filter cartridge, 26. Air pipe Ⅱ, 27 .Fixed rod Ⅰ, 28. Fixed rod Ⅱ, 701. Telescopic rod, 702. Cylinder body, 703. Air hole, 704. Support rod, 1201. Wind sensing plate, 1202. Connecting rod, 1203. Wind deflector, 1204. Spring , 1205. Threaded rod, 1206. Knob.

Detailed ways

Below the present invention is further described:

Please refer to Figure 1-5,

Combining Figure 1 and Figure 5, the compound dust removal system of wrong filter-end filter includes air inlet chamber 10, wrong filter room 6, end filter room 24, clean room 17, air inlet pipe 2, air outlet pipe 16, wrong filter filter Cartridge 4, end filter cartridge 25, dust cleaning ring 5, telescopic cylinder 7, air pipe I20, air pipe II26, fixed rod I27, fixed rod II28, nozzle 13, pulse valve 14, blowing pipe 15, controller 21, steady wind Valve (12), air bag 19, fan 18, air compressor 22, ash collecting device 9;

Inside the box body 1, four spaces are arranged in sequence according to the flow direction of the main airflow, which are the air intake chamber 10, the misfilter chamber 6, the end filter chamber 24, and the clean room 17;

The air intake chamber 10 is a space formed by the middle partition 11, the upper flower plate 3 and the inner wall of the box body 1, and the air inlet pipe 2 is installed in the opening of the box body 1 on the right side of the air intake chamber 10;

The wrong filter chamber 6 forms a space by the middle partition 11, the upper flower plate 3, the lower flower plate 8 and the inner wall of the box body 1. In the wrong filter chamber 6, a wrong filter cartridge 4 is provided. 4 Installed between the upper flower plate 3 and the lower flower plate 8, a dust removal ring 5 is set on the periphery of the wrong filter cartridge 4, the dust removal ring 5 is connected with the telescopic rod 701 of the telescopic cylinder 7, and the bottom of the telescopic cylinder 7 is provided with The air hole 703 is connected to the trachea II 26, the trachea II 26 is connected to the air bag 19 and a valve K2 is installed on the trachea II 26, and the valve K2 is connected to the controller 21;

The end filter chamber 24 forms a space by the middle partition 11, the lower flower plate 8, the flower plate 23 and the inner wall of the casing 1, and an end filter cartridge 25 is arranged in the end filter chamber 24, and the end filter cartridge 25 Suspended and installed under the flower plate 23, the top opening of the end filter cartridge 25 corresponds to the opening position in the middle of the flower plate 23;

The clean room 17 is formed by the middle partition 11, the flower plate 23 and the box body 1. The clean room 17 is provided with a nozzle 13, a pulse valve 14 and a spray pipe 15. The nozzle 13 is installed on the spray pipe through the pulse valve 14. On 15, the opening of the nozzle 13 is opposite to the top opening of the end filter cartridge 25, the blowing pipe 15 is connected to the air bag 19, the air bag 19 is connected to the air compressor 22 through the air pipe I20, and the valve K1 is installed on the air pipe I20, and the valve K1 is connected to the controller 21 , the pulse valve 14 is also connected with the controller 21, and the outlet pipe 16 is installed in the opening of the cabinet 1 on the top of the clean room 17, and the fan 18 is installed on the outlet pipe 16, and the fan 18 is connected to the controller 21;

Open a hole on the middle partition 11, so that the wrong filter chamber 6 communicates with the clean room 17, and install the wind stabilizing valve 12 at the opening;

An ash collecting device 9 is arranged below the inside of the box body 1, and the ash collecting device 9 can be disassembled. The ash collecting device 9 is a square structure with a hollow top opening.

Combined with Figure 2, the cleaning ring 5 has two holes, the fixed rod I27 and the fixed rod II28 pass through the two holes, and both ends of the fixed rod I27 and the fixed rod II28 are fixed between the upper flower plate 3 and the lower flower plate 8, and the telescopic The cylinder 7 is installed on the lower flower plate 8, and the bottom of the telescopic cylinder 7 is provided with an air hole 703 connected to the air pipe II 26; the cleaning ring 5 moves between the upper flower plate 3 and the lower flower plate 8.

3, the telescopic cylinder 7 is composed of a cylinder body 702 and a support rod 704. The cylinder body 702 is provided with a telescopic rod 701 and an air hole 703. Compressed air enters through the air hole 703 and pushes the telescopic rod 701 to move upward; when the pressure of the compressed air decreases, Telescopic rod 701 moves down.

4, wind stabilizing valve 12 is provided with a wind sensing plate 1201, a connecting rod 1202, a wind deflector 1203, a spring 1204, a threaded rod 1205 and a knob 1206. The structure of the wind sensing plate 1201 is an upper plane and a lower convex surface; the knob 1206 is connected to the threaded rod 1205, the lower end of the threaded rod 1205 is connected to the spring 1204, the compression degree of the spring 1204 on the windshield 1203 can be adjusted through the knob 1206, and then different air volume stability values can be controlled.

Specific embodiment 2:

During dust removal, the blower fan 18 and the air compressor 22 are turned on. Under the negative pressure of the blower fan 18, the dust-laden air volume is recorded as Q _T and enters the air intake chamber 10 from the air inlet pipe 2, and then continues to enter the wrong filter cartridge 4.

In the wrong filter cartridge 4, part of the air flow enters the wrong filter chamber 6 through the side wall of the wrong filter cartridge 4, and the air volume of this part is recorded as Q _c , and the dust in the air flow is intercepted and retained by the side wall of the wrong filter cartridge 4 And gather on the inner surface of the wrong filter cartridge 4 to form a dust cake. On the one hand, this part of the dust cake is subjected to the drag force of the wind passing through the side wall of the wrong filter cartridge 4 and the adhesion force on the inner surface of the wrong filter cartridge 4. And the attachment, on the other hand, is subjected to the shearing force of the axially downward flowing air flow in the wrong filter cartridge 4 . Under the action of shear force, part of the attached dust breaks away from the dust cake and re-enters the airflow. At the same time, due to the diversion of part of the airflow, the dust concentration of the dusty airflow of the misfiltered filter cartridge 4 becomes larger.

The dust-laden airflow axially passing through the misfilter filter cartridge 4 enters the end filter chamber 24 with an air volume denoted as Q _d (Q _c +Q _d =Q _T ).

In the end filter chamber 24, the air volume Q _d passes through the side wall of the end filter cartridge 25 and enters the interior and reaches the clean room 17 through the upper opening, and the dust in the dusty airflow is filtered and retained in the end filter cartridge 25 A dust cake forms on the outer surface;

The clean air volume _Qc in the misfilter chamber 6 enters the clean room 17 through the air stabilizing valve 12 and the clean air volume _Qd from the upper opening of the end filter chamber 24 merges, and is discharged through the air outlet pipe 16 and the fan 18.

In the misfilter chamber 6, the dust cake on the inner surface of the misfilter filter cartridge 4 is jointly affected by gravity, axial wind shear force, radial wind drag force and cylinder wall adhesion. If the thickness of the dust cake is too high, the misfilter The shear force effect of the axially downward flowing wind in the filter cartridge 4 on the dust cake will be more obvious, so that the dust cake will fall off, and finally the thickness of the dust cake on the inner surface of the wrong filter cartridge 4 tends to be stable.

In the end filter chamber 24, the dust on the surface of the end filter cartridge 25 gradually accumulates. With the increase of the filter resistance of the end filter cartridge 25, the air volume _Qc passing through the misfilter chamber 6 is trying to increase, that is, through the air stabilizing valve The air volume of 12 attempts to increase, but under the Bernoulli effect, the increased air volume will increase the pressure difference between the upper and lower sides of the wind sensing plate 1201, causing the wind sensing plate 1201 to move downward under force, and through the connecting rod 1202 to make the windshield The plate 1203 moves down, thereby reducing the cross-section of the air flow channel of the air stabilizing valve 12, keeping the outlet air volume Q _c stable, and thus Q _d also keeping stable, and finally making the mis-filter-end filter composite dust removal system work stably.

When the wrong filter-end filter composite dust removal system is used for dust removal,

Step 1: Dust removal of wrong filter cartridge 4;

Close K1, open K2, the compressed air in the air bag 19 is transmitted to the telescopic cylinder 7 through the air pipe II26, the compressed air enters through the air hole 703, and pushes the telescopic rod 701 to move up. Because the air hole 703 flow channel is small, the compressed air passes through slowly and at a constant speed, which can realize the slow and uniform movement of the ash cleaning ring 5 to the top of the wrong filter cartridge 4, and the side wall of the wrong filter cartridge 4 surrounded by the ash cleaning ring 5 In the area, the airflow cannot pass through the side wall of the filter cartridge 4, that is, the dust cake on the inner surface is subjected to the drag force of the radial wind flow of the filter cartridge and disappears. At this time, under the shearing action of the axial downward flow of the filter cartridge , the dust cake on the inner surface of the wrong filter cartridge 4 is easily peeled off and falls, so as to realize dust removal.

Step 2: Dust removal at the end filter cartridge 25;

Close K2, the controller 21 controls the pulse valve 14 to open, so that the compressed gas in the air bag 19 is sprayed out through the injection pipe 15 through the nozzle 13, and the pulse jet flow hits the bottom of the end filter cartridge 25, and the dynamic pressure of the pulse jet flow Converted to the static pressure required for dust removal, the end filter cartridge 25 is cleaned, and after the end filter cartridge 25 is cleaned, the pulse valve 14 is closed;

After the dust removal of the end filter cartridge 25, the filter resistance decreases, the air volume passing through the end filter chamber 24 tends to increase, and the air volume _Qc of the misfilter chamber 6 tends to decrease. Once the air volume of the misfilter chamber 6 becomes smaller, under the Bernoulli effect, the upward force on the wind sensing plate 1201 inside the air stabilizing valve 12 decreases, and the wind deflector 1203 moves upward through the connecting rod 1202, and the airflow of the air stabilizing valve 12 The section of the channel increases, which keeps the outlet air volume _Qc stable, and thus _Qd also keeps stable, and finally makes the mis-filter-end filter compound dust removal system work stably.

Step 3: reset the dust removal device in the wrong filter chamber 6;

Open K2, due to the consumption of nozzle 13, the air pressure in the air bag 19 drops, the compressed gas in the cylinder body 702 passes through the air hole 703, and then flows back into the air bag 19 through the air pipe II26, realizing the recovery of the gas, so that the cylinder body Insufficient gas pressure in 702, telescopic rod 701 moves down, drives ash removal ring 5 to move down to the bottom of wrong filter cartridge 4, and then closes K2.

Step 4: Supplement the air bag 19 pressure;

K1 is opened, and the air compressor 22 pressurizes the air bag 19 for the next round of dust removal.

The dust removed from the wrong filter chamber 6 and the end filter chamber 24 all falls in the dust collecting device 9 below the box body 1 and is to be discharged in a concentrated manner.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made by using the description of the present invention and the contents of the accompanying drawings or directly or indirectly used in the relevant technical fields are all included in this patent. inventions within the scope of patent protection.

Claims (5)

1. Wrong filter-end filter composite dust removal system, characterized in that: it includes a box (1), and the inside of the box (1) is provided with an air intake chamber (10) and a wrong filter room (6) in sequence according to the flow direction of the main airflow , end filter room (24) and clean room (17) four spaces; The air inlet chamber (10) is formed by the middle partition (11), the upper flower plate (3) and the inner wall of the box (1), and the air inlet pipe ( 2); The wrong filter chamber (6) is formed by the middle partition (11), the upper flower plate (3), the lower flower plate (8) and the inner wall of the box body (1), and several The wrong filter cartridge (4), the wrong filter cartridge (4) is installed between the upper flower plate (3) and the lower flower plate (8), and the outer set of the wrong filter filter cartridge (4) is equipped with a dust removal Ring (5), through the coverage of the dust-cleaning ring, weakens the radial wind flow force of the filter cake in the corresponding area, reduces the adhesion of the filter cake, and makes it peeled off under the shearing action of the downward airflow. The dust-cleaning ring ( The bottom end of 5) is connected to the outer end of the telescopic rod (701) of the telescopic cylinder (7), and the bottom of the telescopic cylinder (7) is provided with an air hole (703) connected to one end of the air pipe II (26), and the air pipe II (26) The other end of the gas bag (19) is connected with a valve K2 on the air pipe II (26), and the valve K2 is electrically connected with the controller (21); The end filter chamber (24) is a space formed by the middle partition (11), the lower flower plate (8), the flower plate (23) and the inner wall of the box body (1), and several end filter chambers (24) are provided. Filter type filter cartridge (25), the end filter type filter cartridge (25) is suspended and installed under the flower plate (23), and its top opening corresponds to the opening position in the middle of the flower plate (23); The clean room (17) is a space formed by the middle partition (11), the flower plate (23) and the inner wall of the box (1), and the clean room (17) is provided with a nozzle (13), a pulse valve (14) and The blowing pipe (15), the nozzle (13) is installed on the blowing pipe (15) through the pulse valve (14), the opening of the nozzle (13) is opposite to the top opening of the filter cartridge (25), and the blowing pipe (15) is connected to the air The air bag (19), the air bag (19) is connected to the air compressor (22) through the air pipe I (20), the air pipe I (20) is equipped with a valve K1, and the valve K1 and the pulse valve (14) are respectively connected with the controller (21 ), the air outlet pipe (16) is installed on the top of the clean room (17), the fan (18) is installed on the air outlet pipe (16), and the fan (18) is electrically connected to the controller (21); An opening for connecting the misfilter chamber (6) with the clean room (17) is provided on the middle partition (11), and an air stabilizing valve (12) is installed at the opening; A detachable ash collecting device (9) is provided under the inner cavity of the box body (1). 2. The wrong filter-end filter compound dust removal system according to claim 1, characterized in that: the dust cleaning ring (5) is provided with a fixed rod I (27) and a fixed rod II (28) to pass through the sliding hole, the two ends of the fixed rod I (27) and the fixed rod II (28) are respectively fixed on the upper flower plate (3) and the lower flower plate (8), and the telescopic cylinder (7) is installed on the lower flower plate ( 8) On the top, there is an air hole (703) at the bottom of the telescopic cylinder (7) to connect to the air pipe II (26); (8) Movement between. 3. The misfilter-end filter compound dust removal system according to claim 2, characterized in that: the telescopic cylinder (7) includes a cylinder body (702) and a support rod (704), and the support rod (704) is fixed At the bottom of the cylinder (702), and the bottom of the support rod (704) is fixed on the lower flower plate (8); the cylinder (702) is equipped with a telescopic rod (701) and air holes (703) , the compressed air enters through the air hole (703), and the telescopic rod (701) is pushed up; when the pressure of the compressed air becomes smaller, the telescopic rod (701) moves down. 4. The wrong filter-end filter compound dust removal system according to claim 1, characterized in that: the inside of the wind stabilizing valve (12) is provided with a wind sensing plate (1201), a connecting rod (1202), a wind deflector ( 1203), a spring (1204), a threaded rod (1205) and a knob (1206), the wind sensing plate (1201) has a structure of a plane above and a convex surface below; the knob (1206) and the threaded rod (1205) The upper end is connected, the lower end of the threaded rod (1205) is connected to the spring (1204), the lower end of the spring (1204) is connected to the upper end of the windshield (1203), and the lower end of the windshield (1203) is connected by The rod (1202) is connected to the side wall of the wind-sensing plate (1201), and the compression degree of the spring (1204) on the windshield (1203) can be adjusted through the knob (1206), thereby controlling different stable values of air volume. 5. A control method of the misfilter-end filter compound dust removal system as described in any one of claims 1-4, characterized in that it comprises the following steps: S1: Start the fan (18) and the air compressor (22), and the dust removal system performs the dust removal operation; S2: Wrong filter cartridge (4) for dust removal; close K1, open K2, the compressed air of the air bag (19) is sent to the telescopic cylinder (7) through the air pipe II (26), and the telescopic cylinder (7) drives the dust removal ring (5) Slowly move up at a constant speed to realize the peeling off of the dust cake in the area covered by the cleaning ring (5) in the wrong filter cartridge (4); S3: End filter cartridge (25) cleans dust; close K2, open pulse valve (14), make the compressed gas in the air bag (19) spray out through the nozzle (13) through the blowing pipe (15), and end filter Type filter cartridge (25) for dust removal, end filter type filter cartridge (25) after dust removal is completed, close the pulse valve (14); S4: reset the ash removal device in the wrong filter chamber (6); open K2, the ash removal ring (5) moves down to the bottom of the wrong filter cartridge (4), and then close K2; S5: replenish the pressure of the air bag (19); open K1, and the air compressor (22) pressurizes the air bag (19).

Images