Bag-type dust collector for boiler

Abstract

The bag-type dust collector comprises a shell, a dust collection bag and a supporting frame, the shell is provided with an air inlet, an air outlet and an ash discharge port, a partition plate is fixedly connected in the shell and provided with a through groove for the supporting frame to penetrate through, the dust collection bag is arranged on the supporting frame in a sleeved mode, and the supporting frame is provided with an air inlet and an air outlet. The supporting frame comprises a clamping ring, a guide rod, a supporting rod and a cooling pipe, the guide rod and the cooling pipe penetrate through the through groove, the clamping ring is connected with the upper surface of the partition plate in a clamped mode, the guide rod, the supporting rod and the cooling pipe are all fixedly installed on the clamping ring, the supporting rod abuts against the inner wall of the dust removal bag, and the dust removal bag is located between the supporting rod and the cooling pipe. The utility model has the beneficial effects that the effect of cooling the flue gas is realized, the temperature of the flue gas introduced into the dust removal bag is effectively reduced, the advantage that the temperature of the dust removal bag is lower in the working process is achieved, and the service life of the dust removal bag is prolonged.

Description

Technical Field

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

[0002] Bag filters are made of woven filter cloth or non-woven felt, and use the filtering effect of fiber fabrics to filter dust-containing gases. When the dust-containing gas enters the bag filter, dust particles with large particle size and high specific gravity settle down due to the action of gravity and fall into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is retained, and the gas is purified.

[0003] The Chinese patent application document with publication number CN117323748A discloses a bag filter for boilers in thermal power plants, including a dust collector body, including a dust removal chamber arranged inside the dust collector body; a dust removal unit, including a flower plate arranged at the top of the dust removal chamber, mounting holes opened on the flower plate, dust removal bags and cage arranged in the mounting holes; a connection unit, including a spring rubber ring arranged on the dust removal bag, an auxiliary strip arranged on the spring rubber ring, and a clamping part arranged on the cage; an auxiliary strip connected to the spring rubber ring of the dust removal bag is provided, a special-shaped rod capable of providing a moving space for the auxiliary strip, and the clamping part can pass through the auxiliary strip during the process of installing the dust removal bag and then lowering and installing the cage. During the process of disassembling the cage and taking out the cage upward, the auxiliary strip is squeezed to make the spring rubber ring sink towards the middle of the cage, and the dust removal bag can be taken out when the cage continues to move upward, and it can effectively prevent the dust removal bag from falling into the dust removal chamber when disassembling the bag.

[0004] The waste gas generated by boilers is often at a relatively high temperature. During the long-term treatment of boiler waste gas using a bag filter, the dust removal bags in the bag filter are in a high-temperature state for a long time, which affects the service life of the dust removal bags. Therefore, the bag filters in the prior art have the problem that the temperature of the dust removal bags is too high during the working process. Summary of the Utility Model

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a bag filter for boilers, which includes a shell, a dust removal bag and a support frame, and has the advantage that the temperature of the dust removal bag is relatively low during the working process.

[0006] To achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0007] A boiler bag filter, comprising a housing, dust removal bags and a support frame. The housing is provided with an air inlet, an air outlet and an ash discharge port. A partition is fixedly connected inside the housing. The partition is provided with a through groove for the support frame to pass through. The dust removal bags are sleeved on the support frame. The support frame includes a snap ring, guide rods, support rods and cooling pipes. The guide rods and the cooling pipes pass through the through groove. The snap ring is clamped with the upper surface of the partition. The guide rods, the support rods and the cooling pipes are all fixedly installed on the snap ring. The support rods are in contact with the inner wall of the dust removal bags. The dust removal bags are located between the support rods and the cooling pipes.

[0008] Through such a setting: the effect of cooling the flue gas is achieved, the temperature of the flue gas introduced into the dust removal bags is effectively reduced, the advantage that the temperature of the dust removal bags is relatively low during the working process is achieved, and the service life of the dust removal bags is improved.

[0009] Preferably, the snap ring is provided with an air inlet annular groove and an air outlet annular groove that are respectively communicated with both ends of the cooling pipe. The snap ring is fixedly connected with an air inlet pipe and an air outlet pipe that are respectively communicated with the air inlet annular groove and the air outlet annular groove. The air inlet pipe and the air outlet pipe extend out of the housing.

[0010] Through such a setting: the effect of facilitating the input of cooling air into the cooling pipe is achieved.

[0011] Preferably, a plurality of the cooling pipes are provided. Both ends of the plurality of cooling pipes are communicated with the air inlet annular groove and the air outlet annular groove.

[0012] Through such a setting: the cooling effect on the high-temperature flue gas is improved.

[0013] Preferably, a plurality of the support rods are provided. The plurality of support rods correspond to the plurality of cooling pipes one by one.

[0014] Through such a setting: the dust removal bags are supported by a plurality of support rods, and the stability of the dust removal bags is improved.

[0015] Preferably, the cooling pipe is provided with a heat conducting plate. The cooling pipe is integrally in a "U" shape and extends along the edge of the heat conducting plate. The edge of the heat conducting plate is fixedly connected with the cooling pipe.

[0016] Through such a setting: the effect of improving the cooling effect on the high-temperature flue gas is achieved.

[0017] Preferably, the guide rod is slidably connected with a sliding sleeve. The sliding sleeve is slidably connected with the cooling pipe and the heat conducting plate.

[0018] Through such a setting: the cooling effect of the cooling pipe and the heat conducting plate on the high-temperature flue gas is ensured.

[0019] Preferably, the sliding sleeve is fixedly connected with a dust scraping head located at the cooling pipe and the heat conducting plate.

[0020] By such a setting, the dust removal effect is improved and the residual dust is reduced.

[0021] Preferably, a threaded sleeve is fixedly connected to the lower end of the guide rod, and the threaded sleeve is threadedly connected to a water collecting tray located below the cooling pipe.

[0022] By such a setting, the adverse effect of condensed water on the service life of the dust removal bag is prevented.

[0023] Preferably, a screw is inserted through the sliding sleeve, and the screw is threadedly connected to the partition plate.

[0024] By such a setting, the accidental movement of the sliding sleeve is prevented.

[0025] Preferably, the upper end of the dust removal bag is fixedly connected to the sliding sleeve.

[0026] By such a setting, the function of fixing the dust removal bag is realized.

[0027] Compared with the prior art, the utility model has obtained beneficial technical effects:

[0028] When the air in the shell flows towards the dust removal bag, it contacts the cooling pipe. A cooling gas is introduced into the cooling pipe, and the cooling gas absorbs the heat of the cooling pipe and the flue gas around the cooling pipe, achieving the effect of cooling the flue gas, effectively reducing the temperature of the flue gas introduced into the dust removal bag, achieving the advantage of a relatively low temperature of the dust removal bag during the working process, and improving the service life of the dust removal bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a boiler bag filter in an embodiment of the utility model;

[0030] Figure 2 is a schematic diagram of the internal structure of the shell in an embodiment of the utility model;

[0031] Figure 3 is a schematic diagram of the structure of the partition plate, the dust removal bag and the support frame in an embodiment of the utility model;

[0032] Figure 4 is the utility model Figure 3 a cross-sectional view taken along line A-A;

[0033] Figure 5 is the utility model Figure 3 a cross-sectional view taken along line B-B.

[0034] Among them, the technical features represented by the respective reference numerals are as follows:

[0035] 11. Housing; 12. Air inlet; 13. Exhaust port; 14. Ash discharge port; 15. Partition; 16. Through groove; 21. Dust removal bag; 22. Sliding sleeve; 23. Ash scraping head; 24. Threaded sleeve; 25. Water collecting tray; 26. Screw; 31. Snap ring; 32. Cooling pipe; 33. Air inlet annular groove; 34. Air outlet annular groove; 35. Air inlet pipe; 36. Air outlet pipe; 37. Heat conducting plate; 41. Guide rod; 42. Support rod. Detailed implementation mode

[0036] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following further details the present utility model in conjunction with embodiments. However, the scope of protection required by the present utility model is not limited to the following specific embodiments.

[0037] Reference Figures 1-5 , a boiler bag filter, including a housing 11, a dust removal bag 21 and a support frame. The housing 11 is provided with an air inlet 12, an exhaust port 13 and an ash discharge port 14. A partition 15 is fixedly connected inside the housing 11. The partition 15 is provided with a through groove 16 for the support frame to pass through. The dust removal bag 21 is sleeved on the support frame.

[0038] The support frame includes a snap ring 31, a guide rod 41, a support rod 42 and a cooling pipe 32. The guide rod 41 and the cooling pipe 32 are arranged through the through groove 16. The snap ring 31 is clamped with the upper surface of the partition 15. The guide rod 41, the support rod 42 and the cooling pipe 32 are all fixedly installed on the snap ring 31. The support rod 42 abuts against the inner wall of the dust removal bag 21. A plurality of support rods 42 are provided. The plurality of support rods 42 correspond to the plurality of cooling pipes 32 one by one. The dust removal bag 21 is supported by the plurality of support rods 42 to improve the stability of the dust removal bag 21. The dust removal bag 21 is located between the support rod 42 and the cooling pipe 32. An air pump is used to input air with a lower temperature outside the housing 11 into the cooling pipe 32 to realize the function of cooling the high-temperature flue gas through the cooling pipe 32.

[0039] The snap ring 31 is provided with an intake annular groove 33 and an exhaust annular groove 34 that are respectively communicated with both ends of the cooling pipe 32. The snap ring 31 is fixedly connected with an intake pipe 35 and an exhaust pipe 36 that are respectively communicated with the intake annular groove 33 and the exhaust annular groove 34, and the intake pipe 35 and the exhaust pipe 36 extend outside the housing 11. By connecting with an external air pump through the intake pipe 35, the external air pump inputs cooling air into the cooling pipe 32 through the intake pipe 35 and the intake annular groove 33. After the air in the cooling pipe 32 absorbs heat, it is discharged to the outside of the housing 11 through the exhaust annular groove 34 and the exhaust pipe 36, achieving the effect of facilitating the input of cooling air into the cooling pipe 32. A plurality of cooling pipes 32 are provided in total, and both ends of the plurality of cooling pipes 32 are communicated with the intake annular groove 33 and the exhaust annular groove 34. Through the arrangement of the intake annular groove 33 and the exhaust annular groove 34, it is convenient to input cooling air into a plurality of cooling pipes 32 simultaneously, and the high-temperature flue gas can be cooled by the plurality of cooling pipes 32, improving the cooling effect on the high-temperature flue gas.

[0040] The cooling pipe 32 is provided with a heat conducting plate 37. The cooling pipe 32 is integrally in a "U" shape and extends along the edge of the heat conducting plate 37, and the edge of the heat conducting plate 37 is fixedly connected with the cooling pipe 32. The cooling pipe 32 absorbs the heat on the heat conducting plate 37, and then absorbs the heat of the high-temperature flue gas through the heat conducting plate 37, achieving the effect of improving the cooling effect on the high-temperature flue gas. The guide rod 41 is slidably connected with a sliding sleeve 22, and the sliding sleeve 22 is slidably connected with the cooling pipe 32 and the heat conducting plate 37. The sliding sleeve 22 is fixedly connected with a dust scraping head 23 located at the cooling pipe 32 and the heat conducting plate 37. The sliding sleeve 22 is provided with a screw 26, and the screw 26 is threadedly connected with the partition plate 15. When it is not necessary to move the sliding sleeve 22, the sliding sleeve 22 is fixed on the partition plate 15 through the screw 26 to prevent the sliding sleeve 22 from accidentally moving. The upper end of the dust removal bag 21 is fixedly connected with the sliding sleeve 22, realizing the function of fixing the dust removal bag 21.

[0041] The lower end of the guide rod 41 is fixedly connected with a threaded sleeve 24, and the threaded sleeve 24 is threadedly connected with a water collecting tray 25 located below the cooling pipe 32. When condensed water is generated on the cooling pipe 32 and the heat conducting plate 37, the water collecting tray 25 is used to hold the condensed water, preventing the condensed water from dripping onto the dust removal bag 21 and preventing the condensed water from having an adverse effect on the service life of the dust removal bag 21. Rotate the water collecting tray 25 and remove the water collecting tray 25 from the threaded sleeve 24 to facilitate the cleaning of the water in the water collecting tray 25.

[0042] Specific working process: The flue gas is sent into the housing 11 through the air inlet 12, and the flue gas in the housing 11 passes through the dust removal bag 21 and the exhaust port 13. Larger particles in the flue gas fall downward by gravity to the ash discharge port 14 and are discharged through the ash discharge port 14; smaller particles in the flue gas are filtered by the dust removal bag 21, and the filtered gas is discharged to the outside of the housing 11 through the exhaust port 13, realizing the function of filtering the flue gas.

[0043] This embodiment has the following advantages:

[0044] When the air in the housing 11 flows towards the dust removal bag 21, it contacts the cooling pipe 32. A cooling gas is introduced into the cooling pipe 32, and the cooling gas absorbs the heat of the cooling pipe 32 and the flue gas around the cooling pipe 32, achieving the effect of cooling the flue gas, effectively reducing the temperature of the flue gas introduced into the dust removal bag 21, achieving the advantage of a relatively low temperature of the dust removal bag 21 during the working process, and increasing the service life of the dust removal bag 21.

[0045] The sliding sleeve 22 slides on the guide rod 41, and the dust attached to the cooling pipe 32 and the heat conducting plate 37 is scraped off through the sliding sleeve 22, preventing the dust from reducing the heat conduction efficiency between the cooling pipe 32 and the heat conducting plate 37 and the high-temperature flue gas, and ensuring the cooling effect of the cooling pipe 32 and the heat conducting plate 37 on the high-temperature flue gas. The dust attached to the cooling pipe 32 and the heat conducting plate 37 is scraped off by the ash scraping head 23, improving the dust removal effect and reducing the residual dust.

[0046] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A boiler bag filter, characterized in that: It includes a housing (11), a dust removal bag (21) and a support frame. The housing (11) is provided with an air inlet (12), an air outlet (13) and an ash discharge port (14). A partition plate (15) is fixedly connected inside the housing (11). The partition plate (15) is provided with a through groove (16) for the support frame to pass through. The dust removal bag (21) is sleeved on the support frame. The support frame includes a snap ring (31), a guide rod (41), a support rod (42) and a cooling pipe (32). The guide rod (41) and the cooling pipe (32) pass through the through groove (16). The snap ring (31) is clamped with the upper surface of the partition plate (15). The guide rod (41), the support rod (42) and the cooling pipe (32) are all fixedly installed on the snap ring (31). The support rod (42) abuts against the inner wall of the dust removal bag (21). The dust removal bag (21) is located between the support rod (42) and the cooling pipe (32).

2. The boiler bag filter according to claim 1, characterized in that: The snap ring (31) is provided with an air inlet annular groove (33) and an air outlet annular groove (34) that are respectively communicated with both ends of the cooling pipe (32). The snap ring (31) is fixedly connected with an air inlet pipe (35) and an air outlet pipe (36) that are respectively communicated with the air inlet annular groove (33) and the air outlet annular groove (34). The air inlet pipe (35) and the air outlet pipe (36) extend outside the housing (11).

3. The boiler bag filter according to claim 2, characterized in that: A plurality of the cooling pipes (32) are provided. Both ends of the plurality of cooling pipes (32) are communicated with the air inlet annular groove (33) and the air outlet annular groove (34).

4. The boiler bag filter according to claim 3, characterized in that: A plurality of the support rods (42) are provided. The plurality of support rods (42) correspond to the plurality of cooling pipes (32) one by one.

5. The boiler bag filter according to claim 1, characterized in that: The cooling pipe (32) is provided with a heat conduction plate (37). The cooling pipe (32) is integrally in a "U" shape and extends along the edge of the heat conduction plate (37). The edge of the heat conduction plate (37) is fixedly connected with the cooling pipe (32).

6. The boiler bag filter according to claim 5, characterized in that: A sliding sleeve (22) is slidably connected to the guide rod (41). The sliding sleeve (22) is slidably connected to the cooling pipe (32) and the heat conduction plate (37).

7. The boiler bag filter according to claim 6, characterized in that: The sliding sleeve (22) is fixedly connected with a dust scraping head (23) located at the cooling pipe (32) and the heat conduction plate (37).

8. The boiler bag filter according to claim 6, characterized in that: A threaded sleeve (24) is fixedly connected to the lower end of the guide rod (41). The threaded sleeve (24) is threadedly connected with a water collecting tray (25) located below the cooling pipe (32).

9. The boiler bag filter according to claim 6, wherein: The sliding sleeve (22) is provided with a screw (26). The screw (26) is threadedly connected with the partition plate (15).

10. The boiler bag filter according to claim 6, wherein: The upper end of the dust removal bag (21) is fixedly connected with the sliding sleeve (22).

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