Bag blowing tool of bag-type dust collector and bag-type dust collector

Abstract

The utility model belongs to the technical field of dust removal of bag-type dust removers, and relates to a bag-type blowing tool of a bag-type dust remover and the bag-type dust remover. The purging head is communicated with the air storage tank through a connecting pipe and extends into the inner cavity of the cloth bag; the ratio of the diameter of the purging head to the caliber of the cloth bag is 1: (1.5-3); according to the utility model, the blowing head extends into the inner cavity of the cloth bag to perform back blowing on the cloth bag, dust on the dust sticking surface of the cloth bag and dust on the inner surface of the cloth bag are removed simultaneously, and the blowing effect of the cloth bag is ensured. The ratio of the diameter of the blowing head to the caliber of the cloth bag is 1: (1.5-3), and the distance between the blowing head and the dust sticking surface of the cloth bag is proper, so that when compressed air blown out of the blowing head reaches the dust sticking surface of the cloth bag, the pressure of the compressed air is kept at about 0.35 Mp, the blowing effect of the cloth bag is further ensured, and the service life of the cloth bag is prolonged. The cloth bag blowing tool of the cloth bag dust remover is particularly suitable for large-scale cloth bag dust removers, and aims at solving the problem that a large-capacity cloth bag is poor in reverse blowing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of dust cleaning of bag filters, and particularly relates to a bag purging tool for a bag filter and a bag filter. Background Art

[0002] A bag filter is a dust removal device that uses bags to filter dust-containing gas; when the dust-containing gas passes through the bags, dust particles are intercepted on the surface of the bags, and clean gas is discharged through the pores of the bags, so that the gas is purified. As the use time increases, dust will gradually accumulate on the surface of the bags, affecting the air permeability and dust removal efficiency of the bags. Therefore, in order to ensure the continuous and efficient operation of the bag filter, it is necessary to clean the bags in time.

[0003] In the prior art, there is a certain research on the bag purging tool for bag filters. Referring to the patent document with the application number 201310478416.X, a multi-mode cleaning and backwashing process for a bag dust collection system in blast furnace pulverizing is disclosed, including: at least including 1 bag collection box, and this process controls the backwashing and dust cleaning of the bag collection box with nitrogen by sequentially arranging at least 2 pulse valves on the nitrogen inlet pipe of each bag collection box. The cleaning and backwashing of each bag collection box are specifically divided into a basic cleaning mode, a strengthened cleaning mode, a reinforced cleaning mode, and a heating cleaning mode.

[0004] It can be seen from this that by arranging a pulse valve on the nitrogen inlet pipe, the dust cleaning of the dust-adhering surface of the bag can be realized. However, due to long-term use, some fine dust is easily adsorbed on the inner surface of the bag, and it is difficult to remove the dust on the inner surface of the bag by arranging a pulse valve on the nitrogen inlet pipe to purge the bag, and it is difficult to ensure the purging effect of the bag. Summary of the Utility Model

[0005] In order to solve the technical problems in the background art that the distance between the blow holes and the dust-adhering surface of the bag is too large, and the pressure of the compressed air blown out of the blow holes is greatly reduced when it reaches the dust-adhering surface of the bag, the utility model provides a bag purging tool for a bag filter and a bag filter.

[0006] The bag purging tool of the bag filter of the utility model blows back the bag by extending a purging head into the inner cavity of the bag, and at the same time realizes the dust cleaning of the dust-adhering surface of the bag and the inner surface of the bag, ensuring the purging effect of the bag. Moreover, the ratio of the diameter of the purging head to the diameter of the bag mouth is 1:1.5 - 3, and the distance between the purging head and the dust-adhering surface of the bag is appropriate, so that when the compressed air blown out of the purging head reaches the dust-adhering surface of the bag, the pressure of the compressed air remains at about 0.35Mp, further ensuring the purging effect of the bag. The bag purging tool of the bag filter of the utility model is particularly suitable for large bag filters and aims at the problem of poor backwashing effect for large-capacity bags.

[0007] To solve the above technical problems, the present utility model provides the following technical solutions:

[0008] A cloth bag purging tool for a bag filter, comprising a purging head and a connecting pipe; the purging head is communicated with an air storage tank through the connecting pipe, the air storage tank provides compressed air for purging the cloth bag, the purging head extends into the inner cavity of the cloth bag, and the compressed air reaches the ash adhering surface of the cloth bag through the purging head, wherein the cloth bag refers to the cloth bag of the bag filter; the ratio between the diameter of the purging head and the caliber of the cloth bag is 1:1.5 - 3.

[0009] In a specific feasible embodiment, the purging head is arranged in a circular tubular structure.

[0010] In a specific feasible embodiment, a plurality of first ash blowing holes are formed in the purging head, the plurality of first ash blowing holes are distributed along the circumferential direction of the purging head, and the first ash blowing holes are used for spraying compressed air to the side surface of the cloth bag.

[0011] In a specific feasible embodiment, the plurality of first ash blowing holes are evenly distributed along the circumferential direction of the purging head.

[0012] In a specific feasible embodiment, the aperture range of the first ash blowing holes is 8mm - 12mm.

[0013] In a specific feasible embodiment, a second ash blowing hole is further formed at one end of the purging head away from the connecting pipe, and the second ash blowing hole is used for spraying compressed air to the bottom of the cloth bag.

[0014] In a specific feasible embodiment, the aperture range of the second ash blowing hole is 12mm - 16mm.

[0015] In a specific feasible embodiment, the cloth bag purging tool of the bag filter further comprises a pipeline connector; one end of the pipeline connector is connected to the purging head, and the other end is connected to the connecting pipe.

[0016] In a specific feasible embodiment, a pressurizing device is further included; the pressurizing device is arranged at one end of the connecting pipe close to the purging head, and one end of the pressurizing device is connected to the connecting pipe, and the other end is connected to the purging head.

[0017] A bag filter comprises an air storage tank and an air compressor, and further comprises a cloth bag purging tool of the bag filter; the air compressor is connected to the air storage tank and is used for providing compressed air to the air storage tank; the air storage tank is communicated with one end of the connecting pipe away from the purging head.

[0018] In summary, the present utility model includes the following beneficial technical effects:

[0019] 1. The bag purging tool of the bag filter of the present utility model blows the bag in reverse by extending the purging head into the inner cavity of the bag, simultaneously realizing the ash cleaning of the ash - adhering surface of the bag and the inner surface of the bag, and ensuring the purging effect of the bag. The ratio between the diameter of the purging head and the caliber of the bag is 1:1.5 - 3, and the distance between the purging head and the ash - adhering surface of the bag is appropriate, so that when the compressed air blown out from the purging head reaches the ash - adhering surface of the bag, the pressure of the compressed air remains at about 0.35Mp, further ensuring the purging effect of the bag. The bag purging tool of the bag filter of the present utility model is particularly applicable to large - scale bag filters, aiming at the problem of poor reverse - blowing effect for bags with large capacity.

[0020] 2. The bag purging tool of the bag filter of the present utility model is provided with first ash - blowing holes evenly distributed in the circumferential direction of the purging head. The compressed air blown out through the first ash - blowing holes forms a uniform spraying surface, and the side of the bag is uniformly impacted, avoiding over - purging or omission in local areas and improving the overall purging efficiency of the bag.

[0021] 3. The bag purging tool of the bag filter of the present utility model is also provided with second ash - blowing holes at one end of the purging head far away from the connecting pipe. The second ash - blowing holes purge the dust at the bottom of the bag. The second ash - blowing holes cooperate with the first ash - blowing holes to conduct a comprehensive purge of the side and bottom of the bag, avoiding the emergence of cleaning blind spots and dead corners and improving the purging effect of the bag. Description of the Drawings

[0022] Figure 1 is a schematic structural view of the bag purging tool of the bag filter of the present utility model.

[0023] Figure 2 is a schematic structural view of the bag filter of the present utility model.

[0024] Description of the reference numerals: 1, purging head; 2, connecting pipe; 3, first ash - blowing hole; 4, bag; 5, air storage tank; 6, air compressor. Detailed Embodiments

[0025] The technical solutions of the present utility model will be further explained below in conjunction with the drawings and embodiments, but the present utility model is not limited to the following described embodiments.

[0026] Referring to Figure 1 and Figure 2 , a bag purging tool for a bag filter includes a purging head 1 and a connecting pipe 2. The purging head 1 is communicated with an air storage tank 5 through the connecting pipe 2. The air storage tank 5 provides compressed air for purging the bag 4. The purging head 1 extends into the inner cavity of the bag 4, and the compressed air reaches the ash - adhering surface of the bag 4 through the purging head 1. Among them, the bag 4 refers to the bag 4 of the bag filter; the ratio between the diameter of the purging head 1 and the caliber of the bag 4 is 1:1.5 - 3.

[0027] In the present utility model, the ratio between the caliber of the purging head 1 and the caliber of the cloth bag 4 can be 1:1.5, can be 1:2, or can also be 1:3. The distance between the purging head 1 and the ash - adhering surface of the cloth bag 4 is set within a suitable range, so that when the compressed air blown out from the purging head 1 reaches the ash - adhering surface of the cloth bag 4, the pressure of the compressed air remains at about 0.35 Mp. Any setting method is acceptable.

[0028] The cloth bag purging tool of the cloth bag dust collector of the present utility model blows back the cloth bag 4 by extending the purging head 1 into the inner cavity of the cloth bag 4, and simultaneously realizes the dust cleaning of the ash - adhering surface of the cloth bag 4 and the inner surface of the cloth bag 4, ensuring the purging effect of the cloth bag 4. Moreover, the ratio between the diameter of the purging head 1 and the caliber of the cloth bag 4 is 1:1.5 - 3, and the distance between the purging head 1 and the ash - adhering surface of the cloth bag 4 is appropriate, so that when the compressed air blown out from the purging head 1 reaches the ash - adhering surface of the cloth bag 4, the pressure of the compressed air remains at about 0.35 Mp, further ensuring the purging effect of the cloth bag 4. The cloth bag purging tool of the cloth bag dust collector of the present utility model is particularly suitable for large - scale cloth bag dust collectors to solve the problem of poor back - blowing effect for cloth bags 4 with large capacities.

[0029] Refer to Figure 2 , a cloth bag dust collector includes an air storage tank 5, an air compressor 6, and the cloth bag purging tool of the cloth bag dust collector. The air compressor 6 is connected to the air storage tank 5 and is used to supply compressed air to the air storage tank 5; the air storage tank 5 is communicated with one end of the connecting pipe 2 far from the purging head 1.

[0030] Example 1:

[0031] Refer to Figure 1 and Figure 2 , in the cloth bag purging tool of the cloth bag dust collector of this example, the purging head 1 is set as a circular tubular structure. In the present utility model, the purging head 1 can be set as a circular tubular structure, can be set as a conical structure, or can also be set as a fan - shaped structure, and any setting method that enables the compressed air to reach the ash - adhering surface of the cloth bag 4 through the purging head 1 is acceptable.

[0032] In this example, the purging head 1 is set as a circular tubular structure, so that the resistance suffered by the compressed air when passing through the purging head 1 is small, effectively transmitting the compressed air to the ash - adhering surface of the cloth bag 4 and improving the purging effect of the cloth bag 4.

[0033] Example 2:

[0034] Refer to Figure 1 and Figure 2, The bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 1, a plurality of first ash blowing holes 3 are opened on the blowing head 1, and the plurality of first ash blowing holes 3 are distributed along the circumferential direction of the blowing head 1, and the first ash blowing holes 3 are used to blow compressed air to the side of the bag 4. In the present invention, the number of the first ash blowing holes 3 can be 6, can be 7, or can be 8, and the setting method of blowing compressed air to the side of the bag 4 through the first ash blowing holes 3 is acceptable. In this embodiment, the number of the first ash blowing holes 3 is set to 8.

[0035] Embodiment 3:

[0036] Referring to Figure 1 and Figure 2 , The bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 2, a plurality of first ash blowing holes 3 are evenly distributed along the circumferential direction of the blowing head 1. In the present invention, the plurality of first ash blowing holes 3 can be distributed in a fixed-point strengthening manner or evenly along the circumferential direction of the blowing head 1. The first ash blowing holes 3 are distributed along the circumferential direction of the blowing head 1, and the setting method that the sides of the ash sticking surface of the bag 4 can be cleaned is acceptable.

[0037] In this embodiment, 8 first ash blowing holes 3 are evenly distributed along the circumferential direction of the blowing head 1. The compressed air blown out through the 8 first ash blowing holes 3 forms a uniform jet surface, and the side of the bag 4 is subjected to uniform impact, avoiding over-cleaning or omission in local areas, and improving the overall cleaning efficiency of the bag 4.

[0038] Embodiment 4:

[0039] Referring to Figure 1 , The bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 3, the aperture range of the first ash blowing holes 3 is 8 mm - 12 mm. Specifically, the aperture of the first ash blowing holes 3 can be 8 mm, can be 10 mm, or can be 12 mm, and the aperture of the first ash blowing holes 3 can be set according to the diameter of the blowing head 1. In this embodiment, the aperture of the first ash blowing holes 3 is set to 8 mm.

[0040] Embodiment 5:

[0041] Referring to Figure 1 and Figure 2 , The bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 4, a second ash blowing hole is further opened at one end of the blowing head 1 away from the connecting pipe 2. The second ash blowing hole blows the dust at the bottom of the bag 4. The second ash blowing hole cooperates with the first ash blowing holes 3 to comprehensively clean the side and bottom of the bag 4, avoiding the appearance of cleaning blind spots and dead corners, and improving the cleaning effect of the bag 4.

[0042] Embodiment 6:

[0043] Referring to Figure 1, for the bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 5, the aperture range of the second soot blowing hole is 12 mm - 16 mm. Specifically, the aperture of the second soot blowing hole can be 12 mm, can be 14 mm, or can be 16 mm. The aperture of the second soot blowing hole can be set according to the diameter of the blowing head 1. In this embodiment, the aperture of the second soot blowing hole is 12 mm.

[0044] Embodiment 7:

[0045] Refer to Figure 1 , for the bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 1, the bag cleaning tool of the bag filter further includes a pipe connector. One end of the pipe connector is connected to the blowing head 1, and the other end is connected to the connecting pipe 2. Among them, the pipe connector is an existing commercially available product.

[0046] Embodiment 8:

[0047] Refer to Figure 1 and Figure 2 , for the bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 5, the bag cleaning tool of the bag filter further includes a pressurizing device. The pressurizing device is placed at one end of the connecting pipe 2 close to the blowing head 1, and one end of the pressurizing device is connected to the connecting pipe 2, and the other end is connected to the blowing head 1. In the present utility model, the pressurizing device can be an air compressor 6, an electric booster pump, a piston type booster, etc., and any setting method of pressurizing the compressed air output through the connecting pipe 2 can be used. In this embodiment, the pressurizing device is set as an air compressor 6.

[0048] Embodiment 9:

[0049] Refer to Figure 1 and Figure 2 , for the bag cleaning tool of the bag filter in this embodiment, on the basis of Embodiment 1, the connecting pipe 2 is set as a flexible corrugated pipe. In the present utility model, the connecting pipe 2 can be set as a high-pressure hose, a galvanized pipe, a flexible corrugated pipe, etc., and any setting method of connecting the blowing head 1 and the compressed air pipe through the connecting pipe 2 can be used.

[0050] In this embodiment, the connecting pipe 2 is set as a flexible corrugated pipe. The flexible corrugated pipe can be freely bent and contracted within its elastic range, which is convenient for inserting the blowing head 1 into the inner cavity of the bag 4. At the same time, the flexible corrugated pipe maintains good flow performance when bent, reduces the pressure loss of compressed air caused by pipe bending, and ensures the cleaning effect of the bag 4.

[0051] The working principle of a bag filter of the present utility model is as follows: An air compressor 6 supplies compressed air to an air storage tank 5. The compressed air flows from the air storage tank 5 into a connecting pipe 2. When the compressed air flows along the connecting pipe 2 to the outlet, a pressurizing device pressurizes the compressed air at the outlet of the connecting pipe 2. The pressurized compressed air continues to flow to a blowing head 1. The compressed air at the blowing head 1 is blown to the ash-adhering surface of a bag 4 through a first soot-blowing hole 3 and a second soot-blowing hole, and the dust on the ash-adhering surface and the inner surface of the bag 4 is shaken off, realizing the cleaning of the bag 4.

[0052] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A bag blowing tool for a bag dust collector, characterized by: It comprises a purge head (1) and a connecting pipe (2); The purge head (1) is connected to an air storage tank (5) via a connecting pipe (2), the air storage tank (5) provides compressed air for blowing the bag (4), the purge head (1) extends into the inner cavity of the bag (4), and the compressed air reaches the dust-adhering surface of the bag (4) through the purge head (1), wherein the bag (4) refers to the bag (4) of a bag filter; The ratio between the diameter of the purge head (1) and the diameter of the cloth bag (4) is 1:1.5-3.

2. The bag blowing tool for bag dust collector according to claim 1, characterized in that: The purge head (1) is configured as a circular tubular structure.

3. The bag blowing tool for bag dust collector according to claim 2, characterized in that: The blowing head (1) is provided with a plurality of first soot blowing holes (3), the plurality of first soot blowing holes (3) are distributed along the circumference of the blowing head (1), and the first soot blowing holes (3) are used to spray compressed air toward the sides of the cloth bag (4).

4. The bag blowing tool for bag dust collector according to claim 3, characterized in that: The plurality of first soot blowing holes (3) are evenly distributed along the circumference of the blowing head (1).

5. The bag blowing tool for bag dust collector according to claim 4, characterized in that: The diameter of the first soot blowing hole (3) ranges from 8 mm to 12 mm.

6. The bag blowing tool for bag dust collector according to claim 5, characterized in that: A second soot blowing hole is also provided at one end of the blowing head (1) away from the connecting pipe (2), and the second soot blowing hole is used to spray compressed air toward the bottom of the bag (4).

7. The bag blowing tool for bag dust collector according to claim 6, characterized in that: The aperture of the second soot blowing hole ranges from 12 mm to 16 mm.

8. The bag blowing tool for bag dust collector according to claim 1, characterized in that: Also included are pipe connectors; One end of the pipeline connector is connected to the purge head (1), and the other end is connected to the connecting pipe (2).

9. The bag blowing tool for bag dust collector according to claim 6, characterized in that: It also includes pressurizing equipment; The boosting device is placed at one end of the connecting pipe (2) close to the purge head (1), and one end of the boosting device is connected to the connecting pipe (2) and the other end is connected to the purge head (1).

10. A bag dust collector, characterized in that: It comprises an air storage tank (5) and an air compressor (6), and is characterized in that it also comprises a bag blowing tool for a bag dust collector as claimed in any one of claims 1 to 9; The air compressor (6) is connected to the air storage tank (5) and is used to provide compressed air to the air storage tank (5); The gas storage tank (5) is in communication with an end of the connecting pipe (2) away from the purge head (1).

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