Multi-hole combined blowing device for blowing filter bag

Abstract

The utility model relates to a multi-hole combined blowing device for blowing a filter bag, which comprises a first air bag, the air outlet end of the first air bag is communicated with a first blowing pipe through a first pulse valve, the first blowing pipe is provided with a plurality of first blowing hole groups, the first blowing hole groups comprise a plurality of first blowing holes, and the first blowing holes are communicated with the first blowing pipe through a second pulse valve. One first blowing hole group is opposite to the inner cavity of one filter bag, the air outlet end of the second air bag is communicated with a second blowing pipe through a second pulse valve, a plurality of second blowing hole groups are formed in the second blowing pipe, each second blowing hole group comprises a plurality of second blowing holes, and the second blowing holes are communicated with the air outlet end of the second air bag through a second pulse valve. And one second blowing hole group and one first blowing hole group are opposite to the inner cavity of the same filter bag. According to the utility model, the plurality of first blowing holes are matched with the plurality of second blowing holes to respectively and synchronously blow the upper part and the lower part of the filter bag, so that the soot blowing requirement of the existing ultra-long and ultra-large filter bag with a lengthened bag body and a widened bag opening is met.

Description

Technical Field

[0001] This utility model relates to the technical field of bag filter technology, specifically to a jet blowing device for a multi-porous combined blowing filter bag. Background Technology

[0002] Since its introduction in the 1950s, the pulse jet bag filter has been widely used and continuously improved both domestically and internationally, achieving significant progress in purifying dust-laden gases. It features large air volume handling capacity, small footprint, high purification efficiency, reliable operation, simple structure, and low maintenance. With a dust removal efficiency exceeding 99.99%, it is a mature and highly efficient dust removal device.

[0003] Conventional pulse jet cleaning systems typically use a single jet nozzle to blow air onto one filter bag. To ensure sufficient cleaning capacity, conventional filter bags are generally required to be no longer than 9 meters, and the filtration area of ​​a single filter bag must be less than 5 square meters. However, to reduce the size of the dust collector and its footprint, existing dust collection equipment has increased the requirements for both the length of individual filter bags and the filtration area, resulting in the emergence of square, oval, large-diameter, and pleated filter bags on the market. Therefore, the one-to-one cleaning method and capacity of conventional pulse jet cleaning systems are insufficient to meet the needs of existing filter bag sizes. There is an urgent need for a pulse jet cleaning system to effectively clean the new filter bags with longer bodies and wider openings. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a multi-hole combined blowing filter bag jetting device, which improves the dust blowing effect on existing extra-long and extra-large filter bags with extended bag bodies and widened bag openings, and meets the dust blowing requirements for existing new filter bags.

[0005] This utility model is achieved through the following technical solution: a multi-hole combined blowing filter bag blowing device, including a first air bag, the air outlet of the first air bag is connected to a first blowing pipe through a first pulse valve, and a plurality of first blowing hole groups are distributed along the axial direction on the first blowing pipe. The first blowing hole group includes a plurality of first blowing holes arranged along the axial direction of the first blowing pipe, and one first blowing hole group is opposite to the inner cavity of a filter bag.

[0006] In this scheme, the compressed air from the first air tank is output to the first jet hole group through the first pulse valve. The filter bag is purged through multiple first jet holes, increasing the airflow range and achieving effective purging of the filter bag with a widened opening.

[0007] As an optimization, each of the openings of the multiple first blow holes is fixedly connected to a downward-extending guide tube, and the air outlets of the multiple guide tubes are opposite to the inner cavity of the filter bag. This optimized solution guides the airflow into the inner cavity of the filter bag through the guide tubes, making the airflow more concentrated, increasing the gas velocity, and improving the blowing effect.

[0008] As an optimization, the air outlets of multiple guide tubes extend above the opening of the filter bag. This optimized solution is suitable for purging medium-sized filter bags (approximately 6 meters in length and 14 square meters in area).

[0009] As an optimization, in this design, the air outlets of some of the multiple guide pipes extend above the bag opening of the filter bag, while the air outlets of others extend into the interior of the filter bag. In this optimized design, some guide pipes purge the upper area of ​​the filter bag, while others extend into the interior, guiding the airflow to the inside of the filter bag to purge the lower area. This achieves zoned spraying of the filter bag, improving the cleaning effect on the lower area and making it suitable for purging ultra-long and ultra-large filter bags (over 6 meters in length and over 14 square meters in area).

[0010] As an optimization, a Venturi tube communicating with the inner cavity of the filter bag is fixed at the bag opening, and the air outlet of the guide tube located above the bag opening is connected to the Venturi tube. In this optimized scheme, the Venturi tube further concentrates and induces the airflow injected by the guide tube, entraining more gas and improving the dust removal efficiency.

[0011] As an optimization, a second air chamber is also included. The outlet of the second air chamber is connected to a second blowpipe via a second pulse valve. Several second blowpipe groups are distributed axially along the second blowpipe. Each second blowpipe group includes multiple second blowpipes arranged axially along the second blowpipe. One second blowpipe group and one first blowpipe group are opposite to the inner cavity of the same filter bag. This optimized solution uses the second air chamber in conjunction with the first air chamber to synchronously blow air onto the filter bag, increasing the intensity and volume of the blowing airflow, thereby improving the dust removal effect.

[0012] As an optimization, the second blowpipe is located above and parallel to the first blowpipe. Each of the openings of the multiple second blowpipes is fixedly connected to a blowpipe extension pipe, the outlet of which passes through or bypasses the first blowpipe and faces the inner cavity of the filter bag. This optimized design distributes the second and first blowpipes vertically, thereby reducing horizontal space occupation and allowing for a sufficiently large area for the clean flue gas to rise, resulting in a reasonable structural layout. The blowpipe extension pipes guide the airflow from the second blowpipes into the filter bag for purging, preventing the airflow from being blocked by the first blowpipe.

[0013] As an optimization, multiple guide pipes and multiple jet extension pipes are arranged at axial intervals.

[0014] As an optimization, the air outlet of the extended blowpipe extends into the interior of the filter bag. This optimized solution, in conjunction with the first blowpipe, enables zoned blowing of the filter bag at the top and bottom, ensuring effective dust removal in the lower zone of the extra-long filter bag.

[0015] The beneficial effects of this invention are as follows: By setting up a first air bag and a second air bag to respectively deliver airflow to the inside of the filter bag, sufficient airflow intensity is ensured. Multiple first and second jet nozzles are combined to blow air into the same filter bag cavity, enabling the combined airflow to effectively clean the widened, extra-large filter bag. Furthermore, through a guide pipe or jet extension pipe, part of the airflow is guided to the lower part of the filter bag, ensuring effective cleaning of the lower part. The lower airflow can also drive the upper airflow, improving the blowing effect on the bottom of the bag. By blowing air into the upper and lower areas of the filter bag separately, effective cleaning of extra-long, large filter bags is ensured. In summary, this device can meet the dust blowing needs of existing extra-long, extra-large filter bags with extended bodies and widened openings, as well as pleated filter bags. Attached Figure Description

[0016] Figure 1 This is a front view of Example 1;

[0017] Figure 2 This is a front view of Example 2;

[0018] Figure 3 This is a schematic diagram of the first jet nozzle group;

[0019] Figure 4 This is a schematic diagram of the second jet nozzle group;

[0020] Figure 5 These are front views of Examples 3 and 4;

[0021] Figure 6 This is a side view of the jet extension tube in Example 3;

[0022] Figure 7 This is a side view of the jet extension tube in Example 4;

[0023] As shown in the figure:

[0024] 1. Filter bag, 2. First air tank, 3. First pulse valve, 4. First blow pipe, 5. First blow hole group, 51. First blow hole, 6. Guide pipe, 7. Venturi tube, 8. Second air tank, 9. Second pulse valve, 10. Second blow pipe, 11. Blow pipe connection pipe, 12. Second blow hole group, 121. Second blow hole, 13. Blow extension pipe, 131. Upper straight pipe section, 132. Bent pipe section, 133. Lower straight pipe section. Detailed Implementation

[0025] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0026] Example 1:

[0027] like Figure 1 ,3 As shown, a multi-hole combined blowing filter bag blowing device includes a first air tank 2. The air outlet of the first air tank 2 is connected to a first blowing pipe 4 through a first pulse valve 3. A plurality of first blowing hole groups 5 are distributed along the axial direction on the first blowing pipe 4. The first blowing hole group 5 includes a plurality of first blowing holes 51 arranged along the axial direction of the first blowing pipe 4. One first blowing hole group 5 is opposite to the inner cavity of a filter bag 1.

[0028] Specifically, the number of the first blow hole group 5 is the same as the number of filter bags 1 arranged axially along the first blow pipe 4 inside the dust collector. The first blow hole group 5 corresponds one-to-one with the filter bag 1. By blowing airflow onto a filter bag 1 through multiple first blow holes 51 arranged axially, the blowing range in the width direction of the filter bag 1 is ensured, so that multiple airflows can cover the radial end face of the inner cavity of the filter bag 1, and effectively blow the filter bag 1 in the width direction.

[0029] In this embodiment, since the flow field resistance of each region of the filter bag cavity corresponding to the multiple first blowing holes 51 is different, the multiple first blowing holes 51 can be set with different hole diameters, so that the multiple first blowing holes 51 can spray airflows of different intensities to purify each region with different intensities.

[0030] Each of the plurality of first blow holes 51 has a downwardly extending guide tube 6 fixedly connected to its opening, and the air outlets of the guide tubes 6 are all opposite to the inner cavity of the filter bag 1. In this embodiment, the air outlets of the guide tubes 6 extend to the top of the bag opening of the filter bag 1. The airflow blown by the first blow holes 51 is guided to the bag opening of the filter bag 1 through the guide tubes 6, so that the airflow is more concentrated and sprayed into the interior of the filter bag 1, increasing the gas flow rate and improving the blowing efficiency and blowing effect.

[0031] A Venturi tube 7, communicating with the inner cavity of the filter bag 1, is fixed at the bag opening. The air outlet of the guide pipe 6 located above the bag opening is connected to the Venturi tube 7. The number of Venturi tubes is the same as the number of guide pipes located above the bag opening, and the Venturi tubes 7 and guide pipes 6 are paired one-to-one. The airflow injected into the guide pipe 6 through the Venturi tube 7 is further concentrated and induced into the filter bag 1, drawing in more gas and further improving the dust removal effect.

[0032] Specifically, the filter bag is usually installed on a sealing plate inside the dust collector. The sealing plate divides the inner cavity of the dust collector into upper and lower chambers. The bag opening of the filter bag is fixed to the bottom surface of the sealing plate. The venturi tube is installed on the sealing plate, thereby connecting the inner cavity of the filter bag and the upper chamber. This is the conventional technology of existing dust collectors, and will not be elaborated on here.

[0033] In use, compressed air is supplied through the first air tank 2, and the airflow is controlled by the first pulse valve 3 to be delivered into the first blowpipe 4. The airflow is guided by multiple first blowholes 51 and the guide pipe 6 and blown into the filter bag 1 for cleaning. In this embodiment, multiple first blowholes 51 are used to blow air onto a single filter bag 1, resulting in a wider and larger airflow range. Therefore, it can clean medium-sized filter bags with relatively wide openings (width greater than 240 mm and less than 450 mm). However, because the guide pipe in this embodiment is located above the bag opening, the airflow gradually weakens after entering the filter bag. To ensure that the airflow can effectively clean the filter bag along its length, this embodiment is only suitable for filter bags of conventional length (length not exceeding 6 meters).

[0034] Example 2:

[0035] like Figure 2 , 3 As shown, the difference between this embodiment and Embodiment 1 is that, among the plurality of guide pipes 6, the air outlet of a portion of the guide pipes 6 extends to the top of the bag opening of the filter bag 1, while the air outlet of the other portion of the guide pipes 6 extends into the interior of the filter bag 1. Specifically, the guide pipes located above the bag opening and the guide pipes extending into the interior of the filter bag are distributed alternately, and the air outlet of the guide pipes 6 extending into the interior of the filter bag 1 extends at least to the middle position of the inner cavity of the filter bag 1.

[0036] In use, in this embodiment, one part of the guide pipe 6 is set above the bag opening, which can effectively blow the upper area of ​​the filter bag 1. Another part of the guide pipe 6 extends through the sealing plate of the dust collector into the interior of the filter bag 1, thereby guiding a part of the airflow into the interior of the filter bag 1, thereby blowing the lower area of ​​the filter bag 1, improving the dust removal effect of the lower area of ​​the filter bag 1, realizing the zoned jet blowing of the filter bag, thus ensuring effective blowing and dust removal of ultra-long and ultra-large filter bags (length exceeding 6 meters and area greater than 14 square meters), and meeting the dust removal needs of existing new filter bags with extended bag bodies and widened bag openings.

[0037] Example 3:

[0038] like Figure 4 , 5 As shown in Figure 6, the difference between this embodiment and Embodiment 1 is that it further includes a second air chamber 8. The air outlet of the second air chamber 8 is connected to a second blowpipe 10 via a second pulse valve 9. Several second blowpipe groups 12 are axially distributed on the second blowpipe 10. Each second blowpipe group 12 includes multiple second blowpipe holes 121 arranged axially along the second blowpipe 10. One second blowpipe group 12 and one first blowpipe group 5 are opposite to the inner cavity of the same filter bag 1. The number of second blowpipe groups 12 is the same as the number of first blowpipe groups 5. Using one second blowpipe group 12 in conjunction with one first blowpipe group 5 to blow the upper and lower sections of a filter bag 1 results in higher efficiency.

[0039] Specifically, the second blowpipe 10 is located above the first blowpipe 4 and is arranged parallel to the first blowpipe 4. Each of the openings of the plurality of second blowpipe holes 121 is fixedly connected to a blowpipe extension pipe 13. The air outlets of the blowpipe extension pipes 13 extend into the interior of the filter bag 1 and at least to the middle of the inner cavity of the filter bag 1. The plurality of guide pipes 6 and the plurality of blowpipe extension pipes 13 are arranged at axial intervals. In this embodiment, the air outlet of the blowpipe extension pipe 13 extends into the interior of the filter bag 1 after passing through the sealing plate of the dust collector.

[0040] In this embodiment, since the flow field resistance of each region in the lower part of the filter bag cavity corresponding to the multiple second blowing holes is different, the multiple second blowing holes 121 can be set with different hole diameters, so that the multiple second blowing holes 121 can spray airflows of different intensities to purify each region with different intensities.

[0041] In use, the second air tank 8 provides compressed air, and the airflow is controlled by the second pulse valve 9 to enter the second blow pipe 10. The airflow is sprayed to the lower part of the filter bag 1 through multiple second blow holes 121 in conjunction with the guide of the blow extension pipe 13, extending the airflow blowing length and ensuring the dust removal effect on the lower part of the filter bag 1. The lower airflow can also drive the upper airflow, improving the blowing effect of the device.

[0042] The first and second air bags provide airflow to simultaneously blow the upper and lower areas of filter bag 1. The air volume is sufficient, the airflow intensity is higher, the blowing area is larger, and the blowing length is longer, thus ensuring effective blowing and dust removal of ultra-long and ultra-large filter bags (length exceeds 6 meters and area is greater than 14 square meters). This meets the dust removal needs of new filter bags with extended bag bodies and widened bag openings, as well as pleated filter bags.

[0043] In this embodiment, a blow-through connecting pipe 11 is connected to the side wall of the second blow-through pipe 10, and the second pulse valve 9 is connected to the second blow-through pipe 10 through the blow-through connecting pipe 11.

[0044] In this embodiment, the air outlets of multiple blowing extension pipes 13 bypass the first blowing pipe 4 and the inner cavity of the filter bag 1.

[0045] Relatively speaking, the blowing extension tube 13 includes an upper straight tube section 131, a lower straight tube section 133, and a curved tube section 132 connecting the upper straight tube section 131 and the lower straight tube section 133. The upper and lower straight tube sections are located above and below the first blowing tube 4, respectively. The upper port of the upper straight tube section 131 is fixedly connected to the opening of the second blowing hole 121. The inner diameter of the curved tube section 132 is adapted to the outer diameter of the first blowing tube 4, and the inner wall of the curved tube section is attached to the outer wall of the first blowing tube. The upper port of the curved tube section 132 is fixedly connected to the lower port of the upper straight tube section 131, and the lower port of the curved tube section 132 is fixedly connected to the upper port of the lower straight tube section 133. The lower port of the lower straight tube section 133 extends into the filter bag 1. In this embodiment, the blowing extension tube 13 extends into the filter bag 1 by bypassing the first blowing tube 4 through the curved tube section 132, thus preventing the second blowing hole 121 from being blocked by the first blowing tube 4.

[0046] Example 4:

[0047] like Figure 4 , 5 As shown in Figure 7, the difference between this embodiment and Embodiment 3 is that in this embodiment, the air outlets of multiple blowing extension tubes 13 all pass through the first blowing tube 4 and are opposite to the inner cavity of the filter bag 1. Specifically, the blowing extension tube 13 is a vertically extending straight tube, which passes through the top and bottom of the first blowing tube 4 in sequence and extends into the filter bag 1. The connection between the blowing extension tube 13 and the first blowing tube 4 is sealed.

[0048] In this embodiment, the blowing extension tube 13 is designed as a straight tube, which facilitates processing and saves material costs. Furthermore, the airflow injected from the second blowing hole 121 can enter the filter bag 1 vertically downwards, shortening the airflow path, reducing losses during the flow process, and increasing the airflow intensity.

[0049] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A jet-blowing device for a porous combined purge filter bag, comprising a first air chamber (2), wherein the air outlet of the first air chamber is connected to a first jet pipe (4) via a first pulse valve (3), characterized in that: The first blow pipe (4) has a plurality of first blow hole groups (5) distributed along the axial direction. The first blow hole group (5) includes a plurality of first blow holes (51) arranged along the axial direction of the first blow pipe (4). One first blow hole group (5) is opposite to the inner cavity of a filter bag (1).

2. The jet-blowing device for the porous combined purging filter bag according to claim 1, characterized in that: Each of the openings of the first blow holes (51) is fixed with a downward-extending guide tube (6), and the air outlets of the multiple guide tubes (6) are opposite to the inner cavity of the filter bag (1).

3. The jet-blowing device for the porous combined purging filter bag according to claim 2, characterized in that: The air outlets of multiple guide tubes (6) extend above the bag opening of the filter bag (1).

4. The jet-blowing device for the porous combined purge filter bag according to claim 2, characterized in that: Among the multiple guide tubes (6), the air outlet of a portion of the guide tubes (6) extends to the top of the bag opening of the filter bag (1), while the air outlet of another portion of the guide tubes (6) extends into the interior of the filter bag (1).

5. The jet-blowing device for the porous combined purge filter bag according to claim 3 or 4, characterized in that: A venturi tube (7) communicating with the inner cavity of the filter bag (1) is fixed at the bag opening, and the air outlet of the guide tube (6) located above the bag opening is connected to the venturi tube (7).

6. The jet-blowing device for the porous combined purge filter bag according to claim 3, characterized in that: It also includes a second air bag (8), the air outlet of the second air bag is connected to a second blow pipe (10) through a second pulse valve (9), and a number of second blow hole groups (12) are distributed along the axial direction on the second blow pipe (10). The second blow hole group (12) includes a number of second blow holes (121) arranged along the axial direction of the second blow pipe (10). A second blow hole group (12) and a first blow hole group (5) are opposite to the inner cavity of the same filter bag (1).

7. The jet-blowing device for the porous combined purging filter bag according to claim 6, characterized in that: The second blow pipe (10) is located above the first blow pipe (4) and is parallel to the first blow pipe (4). The openings of the multiple second blow holes (121) are all fixed with blow extension pipes (13). The air outlets of the multiple blow extension pipes pass through or bypass the first blow pipe (4) and are opposite to the inner cavity of the filter bag (1).

8. The jet-blowing device for the porous combined purge filter bag according to claim 7, characterized in that: Multiple guide pipes (6) and multiple jet extension pipes (13) are arranged at intervals along the axial direction.

9. The jet-blowing device for the porous combined purge filter bag according to claim 7, characterized in that: The air outlets of the blow-out extension tubes (13) all extend into the interior of the filter bag (1).

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