CN115253506B

CN115253506B - Rotary filter bag ash removal device and dust remover

Info

Publication number: CN115253506B
Application number: CN202210602967.1A
Authority: CN
Inventors: 陈奎续; 黄亚继; 王圣; 钟永生; 朱召平; 信明勋
Original assignee: Southeast University; Fujian Longking Co Ltd.
Current assignee: Southeast University; Fujian Longking Co Ltd.
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2023-06-16
Anticipated expiration: 2042-05-30
Also published as: CN115253506A

Abstract

The invention discloses a rotary filter bag ash removal device and a dust remover, which comprises a gas transmission main pipe and at least one group of blowing units, wherein the gas transmission main pipe is communicated with a gas supply unit, the blowing units comprise gas transmission branch pipes, blowing pipes and gas guide pipes, the gas transmission branch pipes are axially communicated with the blowing pipes and can rotate relatively in the circumferential direction, the gas guide pipes are communicated with the gas transmission main pipe, blowing holes uniformly distributed in the axial direction are formed in the peripheral wall of the blowing pipes, the blowing direction is along the radial direction of the blowing pipes, the dust remover also comprises at least one group of driving units, each driving unit comprises a rotating shaft and a power blade, the rotating shaft is coincident with the rotating axis of the blowing pipe, the first end of each driving unit is connected with the gas transmission branch pipe and can rotate circumferentially, the second end of each driving unit is fixedly connected with the blowing pipe, and the power blade is fixedly arranged on the rotating shaft and the gas guide pipe extends along the tangential direction of the circumference where the power blade is located. The invention uses compressed air as power to blow to the power blade to drive the blowing pipe to rotate, the blowing direction is perpendicular to the filter bag, and continuous high-strength blowing is formed, and the ash removing effect is good.

Description

Rotary filter bag ash removal device and dust remover

Technical Field

The invention relates to the technical field of industrial smoke and dust treatment, in particular to a rotary filter bag ash removal device and a dust remover.

Background

The bag type dust collector or the electric bag type dust collector filters dust-containing gas by utilizing the filtering effect of fiber fabrics, the core component of the dust-containing gas is a filter bag, and the operation stability of the dust collector and even the whole system is directly influenced by the quality of the working performance of the filter bag. In the dust removal and filtration process of the filter bag, as more and more dust are trapped, the pore channel of the filtered air flow can be gradually reduced, so that the resistance of the filter bag to the air flow is increased, the filtration effect and the service life of the filter bag can be seriously influenced for a long time, and the operation stability of the dust remover and even the whole system is influenced. Therefore, in the operation process of the bag type dust collector or the electric bag type dust collector, dust adsorbed on the surface of the filter bag needs to be timely removed through the filter bag ash removing device, and the filter bag ash removing device is one of key technologies for ensuring the stable operation of the dust collector.

In the ash removing mechanism in the prior art, compressed air sprayed out of the air spraying holes in the spraying pipe and the circumference of the filter bag are close to form a tangential direction, when compressed air sprayed out of the back-blowing air spraying pipe is sprayed to the inner side of the filter bag, the formed reaction force makes the back-blowing air spraying pipe rotate, continuous high-strength spraying cannot be formed on the filter bag, and the ash removing effect is poor.

Disclosure of Invention

The invention aims to provide a rotary filter bag ash removal device which can form continuous high-strength blowing on a filter bag and has good ash removal effect.

The invention also aims to provide a dust remover which can form continuous high-strength blowing on the filter bag and has good dust removing effect.

In order to solve the technical problems, the invention provides a rotary filter bag ash removal device which comprises a gas transmission main pipe and at least one group of blowing units, wherein the gas transmission main pipe is communicated with a gas supply unit,

the blowing unit comprises a gas transmission branch pipe, a blowing pipe and a gas guide pipe, wherein the gas transmission branch pipe is axially communicated with the blowing pipe and can rotate relatively in the circumferential direction, the gas guide pipe is communicated with the gas transmission branch pipe and the gas transmission main pipe, blowing holes which are uniformly distributed in the axial direction are formed in the circumferential wall of the blowing pipe, and the blowing direction is along the radial direction of the blowing pipe;

the air guide device comprises an air guide pipe, and is characterized by further comprising at least one group of driving units, wherein the driving units are correspondingly arranged inside the air blowing unit, each driving unit comprises a rotating shaft and a power blade, the rotating shafts are coincident with the rotating axes of the air blowing pipes, the first ends of the rotating shafts are connected with the air conveying branch pipes and can circumferentially rotate, the second ends of the rotating shafts are fixedly connected with the air blowing pipes, the power blades are fixed on the rotating shafts, and the air guide pipes extend along the tangential directions of the circumferences of the power blades.

The injection pipe of the rotary filter bag ash removal device is partially inserted into the filter bag, when the filter bag is required to be ash removed, the control valve can be opened firstly, compressed air from the air storage tank can enter the gas transmission main pipe, then the compressed air enters the injection pipe through the gas guide pipe and the gas transmission branch pipe in sequence, and the compressed air is vertically injected to the filter bag from the injection hole to remove ash; simultaneously, because the air duct extends along the tangential direction of the circumference that power blade place, consequently, when compressed air gets into the gas-supply branch pipe along the air duct, can blow to power blade along power blade's tangential to order about power blade and revolute the pivot and rotate, because pivot second end and jetting pipe fixed connection, and then drive the jetting pipe and revolute the pivot and rotate, make the jetting pipe can blow the filter bag inner wall along circumference evenly, guarantee the homogeneity of filter bag circumference each position deashing effect.

Therefore, the invention blows the compressed air to the power blade by taking the compressed air as the power, and drives the blowing pipe to rotate, the blowing direction of the compressed air is always vertical to the filter bag in the process, continuous high-strength blowing is formed on the filter bag, and the ash removing effect is better.

Optionally, the jetting pipe includes axial intercommunication big footpath section and path section, path section with big footpath section eccentric settings, big footpath section with the gas-supply branch pipe passes through sealed rotary joint and connects, path section perisporium outside is provided with the jetting hole.

Optionally, the diameter of the blowing hole is 5 mm-10 mm; the distance between two adjacent blowing holes is 10 mm-50 mm.

Optionally, one end of the small diameter section away from the large diameter section is connected with a positioning rod, the axis of the positioning rod coincides with the rotation axis, and the positioning rod further comprises a positioning bracket, the positioning bracket is fixed on a bottom cover of the cage frame, and the positioning rod is installed on the positioning bracket in a relatively rotatable manner.

Optionally, the device further comprises a sealing rotary joint, wherein one axial end of the sealing rotary joint is a fixed end, the other axial end of the sealing rotary joint is a rotatable end, the fixed end is communicated with the gas transmission branch pipe, and the rotatable end is communicated with the blowing pipe.

Optionally, the utility model also comprises an outer sleeve which can be sleeved with the small diameter section in a relative rotation way and has a preset gap with the small diameter section,

the peripheral wall of the outer sleeve is provided with strip-shaped holes which are axially and sequentially connected and circumferentially staggered to surround the outer sleeve for at least one circle, each strip-shaped hole at least corresponds to one blowing hole, the width of each strip-shaped hole is not less than the aperture of the blowing hole,

the rotation speed of the outer sleeve is set as follows: the blowing pipe rotates for a circle, and the outer sleeve rotates the width of the strip-shaped hole.

Optionally, the gap between the outer sleeve and the small-diameter section is 0.1 mm-0.3 mm.

Optionally, both ends of the outer sleeve are connected with the small-diameter section through sealing bearings, the sealing bearings close to one end of the large-diameter section are provided with gear parts, the second end of the rotating shaft penetrates out of the large-diameter section and is fixedly sleeved with a transmission gear, and the sealing bearings with the gear parts are in transmission connection with the transmission gear.

Optionally, the two ends of the rotating shaft are respectively connected with the gas transmission branch pipe and the large-diameter section through the sealing bearings, and the rotating shaft further comprises connecting blades, wherein the connecting blades are fixedly sleeved with the rotating shaft and fixedly connected with the inner wall of the large-diameter section.

The invention also provides a dust remover, which comprises a filter bag, a cage frame for supporting the filter bag and the rotary filter bag ash removing device, wherein the blowing pipe is partially inserted into the filter bag.

The dust remover comprises the rotary filter bag ash removing device, so that the dust remover has the same technical effects as the rotary filter bag ash removing device, and the description is omitted.

Drawings

FIG. 1 is a schematic view of a dust collector according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the blowing unit of FIG. 1;

FIG. 4 is a schematic view of the lance tube of FIG. 3;

FIG. 5 is a schematic view of the positioning bracket in FIG. 1;

FIG. 6 is a schematic view of the outer sleeve of FIG. 1;

FIG. 7 is a schematic view of the connecting vane of FIG. 1;

wherein reference numerals in fig. 1-7 are described as follows:

1-a gas transmission main pipe; a 2-blowing unit; 21-a gas transmission branch pipe; 22-blowing pipe; 22 a-blowing holes; 221-large diameter section; 222-small diameter section; 223-positioning rod; 23-an airway; 3-an air supply unit; 41-a rotating shaft; 42-power blades; 43-transmission gear, 44-connection blade; 5-positioning a bracket; 6-sealing the rotary joint; 7-an outer sleeve; 7 a-bar-shaped holes; 8-sealing the bearing; 9-bearing; 10-a control valve;

01-filtering bag; 02-cage.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first," "second," and the like, herein are merely used for convenience in describing two or more structures or components that are identical or functionally similar, and do not denote any particular limitation of order and/or importance.

Herein, the side of the peripheral wall of the small diameter section 222 remote from the axis of rotation is the "outside".

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a dust collector according to an embodiment of the present invention; fig. 2 is a top view of fig. 1.

The invention provides a rotary filter bag ash removal device, which comprises a gas transmission main pipe 1 and at least one group of blowing units 2, wherein the gas transmission main pipe 1 is communicated with a gas supply unit 3, the gas supply unit 3 is a gas storage tank for supplying compressed air, and a control valve 10 is arranged on the gas transmission main pipe 1 and used for controlling the on-off of the compressed air;

the blowing unit 2 comprises a gas transmission branch pipe 21, a blowing pipe 22 and a gas guide pipe 23, wherein the gas transmission branch pipe 21 is axially communicated with the blowing pipe 22 and can rotate relatively in the circumferential direction, the gas guide pipe 23 is communicated with the gas transmission branch pipe 21 and the gas transmission main pipe 1, blowing holes 22a uniformly distributed in the axial direction are formed in the circumferential wall of the blowing pipe 22, the blowing direction is along the radial direction of the blowing pipe 22,

the air duct type air blowing device further comprises at least one group of driving units, the driving units are correspondingly arranged in the blowing unit 2, each driving unit comprises a rotating shaft 41 and a power blade 42, the rotating shafts 41 are overlapped with the rotating axis of the blowing pipe 22, the first ends of the rotating shafts 41 are connected with the air conveying branch pipes 21 and can circumferentially rotate, the second ends of the rotating shafts are fixedly connected with the blowing pipe 22, the power blades 42 are fixed on the rotating shafts 41, and the air duct 23 extends along the tangential direction of the circumference where the power blades 42 are located.

When the filter bag 01 needs to be cleaned, the control valve 10 can be opened firstly, compressed air from the air storage tank can enter the air transmission main pipe 1, then sequentially enters the injection pipe 22 through the air guide pipe 23 and the air transmission branch pipe 21, and is vertically injected to the filter bag 01 from the injection hole 22a for cleaning; meanwhile, since the power blade 42 and the air duct 23 are located in the same plane, and the air duct 23 extends along the tangential direction of the circumference of the power blade 42, when compressed air enters the air duct 21 along the air duct 23, the compressed air blows to the power blade 42 along the tangential direction of the power blade 42, so that the power blade 42 is driven to rotate around the rotating shaft 41, and the second end of the rotating shaft 41 is fixedly connected with the blowing pipe 22, so that the blowing pipe 22 drives the blowing pipe 22 to rotate around the rotating shaft 41, so that the blowing pipe 22 can uniformly blow the inner wall of the filter bag 01 along the circumferential direction, and the uniformity of the ash cleaning effect of each part of the filter bag 01 in the circumferential direction is ensured.

Therefore, the compressed air is used as power to blow to the power blades 42, so that the blowing pipe 22 is driven to rotate, the blowing direction of the compressed air is always perpendicular to the filter bag 01 in the process, continuous high-strength blowing is formed on the filter bag 01, and the ash removing effect is better.

In practical application, the quantity of the blowing units 2 can be set according to the quantity of the filter bags 01, the blowing units 2 are in one-to-one correspondence with the filter bags 01, and when the quantity of the blowing units 2 is multiple, the blowing units 2 are uniformly distributed along the axial direction of the gas transmission main pipe 1, so that the pressure and the flow of compressed air entering each blowing unit 2 are basically the same, and each filter bag 01 is guaranteed to have good and consistent ash cleaning effect.

Referring to fig. 3-4, fig. 3 is a schematic structural diagram of the blowing unit in fig. 1; fig. 4 is a schematic view of the structure of the blowing pipe in fig. 3.

In the invention, the blowing pipe 22 comprises a large-diameter section 221 and a small-diameter section 222 which are axially communicated, wherein the small-diameter section 222 and the large-diameter section 221 are eccentrically arranged, namely the rotation axes of the large-diameter section 221 and the small-diameter section are not overlapped, the large-diameter section 221 and the gas transmission branch pipe 21 are connected through a sealed rotary joint 6, and blowing holes 22a are formed at the outer side of the peripheral wall of the small-diameter section 222.

When the large-diameter section 221 rotates around the rotating shaft 41, the small-diameter section 222 performs circular motion by taking the rotating shaft 41 as a circle center and taking the distance between the axis of the small-diameter section 222 and the axis of the rotating shaft 41 as a radius, so that the small-diameter section 222 is always close to the inner wall of the filter bag 01 when rotating, and achieves higher blowing strength by smaller compressed air pressure and air quantity, the ash removal effect is good, the accumulated ash of each part of the filter bag 01 can be thoroughly and uniformly removed, the overall resistance of the dust remover is reduced, the ash removal period is prolonged, the service life of the filter bag 01 is prolonged, and the overall performance of the dust remover is improved.

The diameter of the large diameter section 221 is defined as R, the diameter of the small diameter section 222 is defined as R, the distance between the axis of the small diameter section 222 and the axis of the rotating shaft 41 is in the range of (0, R-R), it can be understood that the closer the small diameter section 222 is to the radial outer end of the large diameter section 221, namely the larger the distance between the axis of the small diameter section 222 and the axis of the rotating shaft 41 is, the smaller the distance between the small diameter section 222 and the inner wall of the filter bag 01 is, the better the ash removing effect is, as shown in fig. 5, in this embodiment, the outer side of the peripheral wall of the small diameter section 222 is flush with the peripheral wall of the large diameter section 221, namely the distance between the axis of the small diameter section 222 and the axis of the rotating shaft 41 is in the range of R-R, which is a preferable technical scheme.

In this embodiment, the diameter of the blowing hole 22a is 5mm to 10mm; the distance between two adjacent blowing holes 22a is 10mm to 50mm.

The axial end of the sealing rotary joint 6 is a fixed end, the other end is a rotatable end, the fixed end is communicated with the gas transmission branch pipe 21, and the rotatable end is communicated with the blowing pipe 22, so that the gas transmission branch pipe 21 is in rotary connection with the blowing pipe 22. The sealing rotary joint 6 can smoothly rotate and simultaneously ensure the sealing performance.

Wherein, the fixed end is fixedly connected with the gas transmission branch pipe 21 through a flange, and the rotatable end is fixedly connected with the blowing pipe 22 through a flange.

With continued reference to fig. 1 and fig. 3-5, fig. 5 is a schematic structural view of the positioning bracket in fig. 1.

In the invention, one end of the small diameter section 222 far away from the large diameter section 221 is connected with a positioning rod 223, the axis of the positioning rod 223 coincides with the rotation axis, and the invention also comprises a positioning bracket 5, the positioning bracket 5 is fixed on the bottom cover of the cage 02, and the positioning rod 223 is arranged on the positioning bracket 5 in a relatively rotatable manner.

So, both ends of the axial of the blowing pipe 22 are positioned, so that the blowing pipe 22 can always rotate around the rotation axis, the blowing pipe 22 is prevented from shaking, the rotation stability of the blowing pipe 22 is improved, and the uniformity of the ash removing effect of each part of the filter bag 01 is improved.

In the embodiment, a bearing 9 is arranged in the middle of the positioning bracket 5, and the positioning rod 223 is connected with the positioning bracket 5 through the bearing 9; in practical application, the locating support 5 is provided with a locating hole extending along the rotation axis, the locating rod 223 is inserted in the locating hole and can play a role in guiding, and of course, the locating rod 223 is connected with the locating support 5 through the bearing 9, so that the rotation of the blowing pipe 22 is smoother, and the technical scheme is preferred.

Referring to fig. 6, fig. 6 is a schematic structural view of the outer sleeve of fig. 1,

the invention relates to a rotary filter bag ash removal device, which further comprises an outer sleeve 7, wherein the outer sleeve 7 is sleeved with a small-diameter section 222 in a relatively rotatable manner, a preset gap is reserved between the outer sleeve 7 and the small-diameter section 222, strip-shaped holes 7a are formed in the peripheral wall of the outer sleeve 7, the strip-shaped holes 7a are axially and sequentially connected and are staggered circumferentially to each other so as to surround the outer sleeve 7 for at least one circle, each strip-shaped hole 7a at least corresponds to one blowing hole 22a, the width of each strip-shaped hole 7a is not smaller than the aperture of the blowing hole 22a, and the rotation speed of the outer sleeve 7 is set as follows: the blowing pipe 22 rotates one turn, and the outer sleeve 7 rotates the width of the strip-shaped hole 7 a.

It will be appreciated that in the rotary filter bag ash removal device of the present invention, if the outer sleeve 7 is not provided, compressed air is blown out from each of the injection holes 22a at the same time, and under a certain air intake amount, the intensity of compressed air sprayed out from each of the injection holes 22a is necessarily weakened, and the compressed air sprayed out from each of the injection holes 22a is uneven, although the ash removal effect is improved to a certain extent as compared with the prior art, the improvement degree is limited. Based on the above, the rotary filter bag ash removal device is provided with the outer sleeve 7, compressed air is blown out from only one blowing hole 22a at the same time, and along with the rotation of the blowing pipe 22, the compressed air is blown out from each blowing hole 22a in turn, so that the blowing strength is greatly improved, the ash removal effect is greatly improved, and the compressed air sprayed out from each blowing hole 22a is more uniform; meanwhile, as the blowing pipe 22 rotates for one circle, the outer sleeve 7 rotates the width of the strip-shaped hole 7a, when the outer sleeve 7 rotates for one circle, the dust removal of all parts in the circumferential direction of the filter bag 01 is just completed once, and the uniformity of the dust removal effect of all parts in the circumferential direction of the filter bag 01 is ensured.

Therefore, the rotary filter bag ash removal device is not limited by the length of the filter bag 01, has uniform blowing strength under certain compressed air condition, can thoroughly and uniformly remove accumulated ash at each part of the filter bag 01, effectively solves the ash removal problem of the long filter bag, and solves the application problem of the long filter bag, namely in practical application, the large space formed between the lower part of the filter bag area and the ash bucket can be fully utilized to arrange the long filter bag, the area of the filter bag is increased, the space utilization rate is high, the occupied area is reduced, and the manufacturing cost of the dust remover is reduced.

In practical applications, the number of the openings of the strip-shaped holes 7a may be set according to the length of the filter bag 01, the diameter of the outer sleeve 7, and the aperture of the blowing holes 22a. The gap between the outer sleeve 7 and the small diameter section 222 is 0.1 mm-0.3 mm. The inner wall of the outer sleeve 7 and the outer wall of the small-diameter section 222 are both provided with finish smooth surfaces, and the rotation is smoother.

With continued reference to fig. 3, in this embodiment, two ends of the outer sleeve 7 are connected to the small-diameter section 222 through the sealing bearing 8, so that the sealing performance can be ensured while the smooth rotation of the outer sleeve 7 is ensured; the sealing bearing 8 near one end of the large-diameter section 221 is provided with a gear part, the second end of the rotating shaft 41 penetrates out of the large-diameter section 221 and is fixedly sleeved with the transmission gear 43, and the sealing bearing 8 with the gear part is in transmission connection with the transmission gear 43.

Thus, the rotary shaft 41 drives the blowing pipe 22 to rotate, and simultaneously, the outer sleeve 7 is driven, so that the structure is simple, and the transmission is reliable.

Further, referring to fig. 3 and 7, in the present embodiment, two ends of the rotating shaft 41 are respectively connected with the gas delivery branch pipe 21 and the large diameter section 221 through the sealing bearing 8, so as to ensure sealing performance, and the present embodiment further includes a connecting blade 44, wherein the connecting blade 44 is fixedly sleeved with the rotating shaft 41 and fixedly connected with the inner wall of the large diameter section 221, so that on one hand, the fixing of the rotating shaft 41 and the large diameter section 221 is realized, and on the other hand, the connecting blade 44 can also be used as a secondary power to realize the driving of the blowing pipe 22.

It should be noted that the foregoing numerical ranges are all exemplary, and in practical application, the numerical ranges may be adaptively adjusted according to the actual working conditions.

The invention also provides a dust remover, which comprises a filter bag 01, a cage 02 for supporting the filter bag 01 and the rotary filter bag ash removing device, wherein the injection pipe 22 is partially inserted into the filter bag 01.

The rotary filter bag ash removal device and the dust remover provided by the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The rotary filter bag ash removal device is characterized by comprising a gas transmission main pipe (1) and at least one group of blowing units (2), wherein the gas transmission main pipe (1) is communicated with a gas supply unit (3),

the blowing unit (2) comprises a gas transmission branch pipe (21), a blowing pipe (22) and a gas guide pipe (23), wherein the gas transmission branch pipe (21) is axially communicated with the blowing pipe (22) and can rotate relatively in the circumferential direction, the gas guide pipe (23) is communicated with the gas transmission branch pipe (21) and the gas transmission main pipe (1), blowing holes (22 a) uniformly distributed in the axial direction are formed in the peripheral wall of the blowing pipe (22), and the blowing direction is along the radial direction of the blowing pipe (22);

the air duct type air conditioner further comprises at least one group of driving units, the driving units are correspondingly arranged inside the blowing unit (2), each driving unit comprises a rotating shaft (41) and power blades (42), the rotating shafts (41) are overlapped with the rotating axes of the blowing pipes (22), the first ends of the rotating shafts (41) are connected with the air conveying branch pipes (21) and can circumferentially rotate, the second ends of the rotating shafts are fixedly connected with the blowing pipes (22), the power blades (42) are fixed on the rotating shafts (41), and the air duct (23) extends along the tangential direction of the circumferences where the power blades (42) are located;

the blowing pipe (22) comprises a large-diameter section (221) and a small-diameter section (222) which are axially communicated, the small-diameter section (222) is eccentrically arranged with the large-diameter section (221), the large-diameter section (221) is connected with the gas transmission branch pipe (21) through a sealing rotary joint (6), and the blowing hole (22 a) is formed in the outer side of the peripheral wall of the small-diameter section (222).

2. The rotary filter bag ash removal device according to claim 1, characterized in that the diameter of the blowing holes (22 a) is 5 mm-10 mm; the distance between two adjacent blowing holes (22 a) is 10 mm-50 mm.

3. The rotary filter bag ash removal device according to claim 1, characterized in that one end of the small diameter section (222) away from the large diameter section (221) is connected with a positioning rod (223), the axis of the positioning rod (223) coincides with the rotation axis, and the rotary filter bag ash removal device further comprises a positioning bracket (5), the positioning bracket (5) is fixed on the bottom cover of the cage frame (02), and the positioning rod (223) is rotatably installed on the positioning bracket (5) relatively.

4. The rotary filter bag ash removal device according to claim 1, characterized in that one axial end of the sealing rotary joint (6) is a fixed end, the other axial end is a rotatable end, the fixed end is communicated with the gas transmission branch pipe (21), and the rotatable end is communicated with the large-diameter section (221).

5. The rotary filter bag ash removal device according to claim 1, further comprising an outer sleeve (7), wherein the outer sleeve (7) is sleeved with the small diameter section (222) in a relatively rotatable manner, and a preset gap is arranged between the outer sleeve and the small diameter section (222),

the peripheral wall of the outer sleeve (7) is provided with strip-shaped holes (7 a), the strip-shaped holes (7 a) are axially and sequentially connected and circumferentially staggered to each other so as to surround the outer sleeve (7) for at least one circle, each strip-shaped hole (7 a) at least corresponds to one blowing hole (22 a), the width of each strip-shaped hole (7 a) is not smaller than the aperture of the blowing hole (22 a),

the rotation speed of the outer sleeve (7) is set as follows: the blowing pipe (22) rotates for one circle, and the outer sleeve (7) rotates the width of the strip-shaped hole (7 a).

6. The rotary filter bag ash removal device according to claim 5, characterized in that the clearance between the outer sleeve (7) and the small diameter section (222) is 0.1 mm-0.3 mm.

7. The rotary filter bag ash removal device according to claim 5, characterized in that both ends of the outer sleeve (7) are connected with the small diameter section (222) through sealing bearings (8), the sealing bearings (8) near one end of the large diameter section (221) are provided with gear parts, the second end of the rotating shaft (41) penetrates out of the large diameter section (221), and a transmission gear (43) is fixedly sleeved, and the sealing bearings (8) with the gear parts are in transmission connection with the transmission gear (43).

8. The rotary filter bag ash removal device according to claim 7, characterized in that two ends of the rotating shaft (41) are respectively connected with the gas transmission branch pipe (21) and the large-diameter section (221) through the sealing bearing (8), and further comprise a connecting blade (44), wherein the connecting blade (44) is fixedly sleeved with the rotating shaft (41) and is fixedly connected with the inner wall of the large-diameter section (221).

9. A dust collector, characterized by comprising a filter bag (01), a cage (02) for supporting the filter bag (01), and a rotary filter bag dust cleaning apparatus according to any one of claims 1-8, wherein the blowing tube (22) is partly inserted inside the filter bag (01).