Flue gas filtering device for gas-fired boiler

Abstract

The utility model relates to the technical field of smoke filtering, in particular to a smoke filtering device for a gas-fired boiler, which comprises a filter cartridge, a filtering mechanism, a leading-out mechanism and a pushing mechanism, a sealing plate is fixed at the top of the filter cartridge, the filtering mechanism is positioned in the filter cartridge, the leading-out mechanism is positioned on the lower side of the filtering mechanism, and the pushing mechanism is positioned on the top of the filtering cartridge. The pushing mechanism is positioned on the bottom side of the filter cartridge. Four ejector rods alternately act to enable a scraping and sweeping seat to move up and down in a filter bag, at the moment, an upper scraping plate and a lower scraping plate on the scraping and sweeping seat scrape and sweep dust on the inner wall of the filter bag, so that the dust is scraped to the position near a dust collection seat, and a dust discharge ball valve is opened to enable the dust collection seat to guide the dust to the outside through a guide-out pipe and a dust discharge branch pipe. And then the dust cleaning process is completed.

Description

Technical Field

[0001] This utility model relates to the field of flue gas filtration technology, and in particular to a flue gas filtration device for a gas-fired boiler. Background Technology

[0002] According to the patent document with publication number CN222305174U, two sets of bypass pipes with filter structures are connected in parallel on the flue gas duct. When the flue gas throughput of the filter structure in one bypass pipe decreases to a certain level, the impact force of the flue gas on the pressure sensor decreases to a certain level as the flue gas flow rate decreases. The pressure sensor then sends a signal to the controller, which simultaneously sends signals to the four solenoid valves on the two bypass pipes and controls the two solenoid valves on that side to close, while opening the two solenoid valves on the other bypass pipe. This allows the flue gas to be automatically switched to flow through the bypass pipe on the other side and the filter structure on the other side to be replaced. At the same time, the filter structure on the side where the flue gas is not flowing is replaced.

[0003] The patent document states that when filtering flue gas, if the flue gas flow rate is too large, the filter structure needs to be replaced frequently, which is very cumbersome. Furthermore, the replaced filter structure needs to be cleaned before it can be used again, making it very inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas filtration device for gas boilers in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A flue gas filtration device for a gas-fired boiler includes a filter cylinder with a sealing plate fixed to the top of the filter cylinder. It also includes a filtration mechanism, a discharge mechanism, and a pushing mechanism. The filtration mechanism is located inside the filter cylinder, the discharge mechanism is located below the filtration mechanism, and the pushing mechanism is located at the bottom of the filter cylinder.

[0007] The filtration mechanism includes a fixed plate, with four filter bags fixed at the bottom of the fixed plate. Each filter bag is equipped with a scraper seat, and three upper scrapers and three lower scrapers are rotatably connected to the outside of each scraper seat. Six rubber strips are fixed at the top of the scraper seat.

[0008] The discharge mechanism includes a sliding plate with four vacuum seats fixed on it. The upper end of each vacuum seat extends into the bottom of the filter bag, and the vacuum seats have a hollow structure.

[0009] The jacking mechanism includes a rotating frame with two arc-shaped seats fixed on the top. Four push rods are provided on the upper side of the rotating frame, with the upper ends of the push rods fixed to the bottom of the scraper seat. A drive assembly is provided at the bottom of the rotating frame.

[0010] Preferably, the fixing plate is fixedly connected to the filter cylinder, and the three upper scrapers and three lower scrapers are arranged alternately.

[0011] Preferably, the lower ends of the six rubber strips are fixed to the upper sides of the three upper scrapers and the three lower scrapers, respectively.

[0012] Preferably, the dust collection base has a sliding hole in the center for the top rod to slide up and down, and the end of the dust collection base that extends into the filter bag has a slot.

[0013] Preferably, the discharge mechanism also includes a discharge pipe located below the sliding plate. A dust discharge ball valve is fixed to one end of the discharge pipe that extends out of the filter cylinder. Four dust discharge branch pipes for connecting to the dust collection seat are provided on the upper side of the discharge pipe.

[0014] Preferably, the drive assembly includes a drive shaft, the upper end of which is fixed to the bottom of the rotating frame, and a drive motor is fixedly mounted on the lower end of the drive shaft.

[0015] Preferably, an inlet pipe is welded to the upper side of the filter cylinder, an outlet pipe is welded to the lower side of the filter cylinder, a flange pipe is welded to the bottom of the filter cylinder, a drain pipe is welded to the side of the flange pipe, a drain valve is installed at the end of the drain pipe, and a support frame for sealing the flange pipe is fixed at the bottom of the filter cylinder.

[0016] The advantages compared to existing technologies are as follows:

[0017] 1. The four push rods move alternately to make the scraper seat move up and down inside the filter bag. At this time, the upper and lower scrapers on the scraper seat will scrape the dust on the inner wall of the filter bag, so that the dust falls to the vicinity of the vacuum seat.

[0018] 2. By opening the dust discharge ball valve, the dust is discharged through the outlet pipe and dust discharge branch pipe to the outside, thus completing the dust cleaning process.

[0019] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a perspective view of a flue gas filtration device for a gas boiler as described in this utility model.

[0021] Figure 2 This is a side view of a flue gas filtration device for a gas boiler as described in this utility model.

[0022] Figure 3 yes Figure 2 The sectional view at point AA.

[0023] Figure 4 yes Figure 2 The sectional view at point BB.

[0024] Figure 5 This is a schematic diagram of the fixed plate, filter bag, and sliding plate of a flue gas filtration device for a gas boiler according to the present invention.

[0025] Figure 6 This is a schematic diagram of the scraper seat, upper scraper, lower scraper, and rubber strip of a flue gas filtration device for a gas boiler according to the present invention.

[0026] Figure 7 This is a schematic diagram of the filter cylinder structure of a flue gas filtration device for a gas boiler according to the present invention.

[0027] Figure 8 This is a schematic diagram of the drain pipe structure of a flue gas filtration device for a gas boiler according to the present invention.

[0028] Figure 9 This is a schematic diagram of the dust collection seat structure of a flue gas filtration device for a gas boiler according to the present invention.

[0029] Figure 10 This is a schematic diagram of the jacking mechanism of a flue gas filtration device for a gas boiler according to the present invention.

[0030] Figure 11 This is a partial cross-sectional view of the connection position between the upper scraper (14), the lower scraper (15), and the scraper seat (13) of the flue gas filtration device for a gas boiler described in this utility model.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. Filtering mechanism; 2. Discharge mechanism; 3. Pushing mechanism; 4. Filter cartridge; 5. Sealing plate; 6. Support frame; 7. Drain pipe; 11. Fixing plate; 12. Filter bag; 13. Scraper seat; 14. Upper scraper; 15. Lower scraper; 16. Rubber strip; 21. Discharge pipe; 22. Dust discharge branch pipe; 23. Dust discharge ball valve; 24. Dust suction seat; 25. Sliding plate; 31. Rotating frame; 32. Arc-shaped seat; 33. Push rod; 34. Drive shaft; 35. Drive motor. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings:

[0034] like Figures 1-11As shown, a flue gas filtration device for a gas-fired boiler includes a filter cylinder 4, a sealing plate 5 fixed to the top of the filter cylinder 4, an inlet pipe welded to the upper side of the filter cylinder 4, an outlet pipe welded to the lower side of the filter cylinder 4, a flange pipe welded to the bottom of the filter cylinder 4, a drain pipe 7 welded to the side of the flange pipe, a drain valve installed at the end of the drain pipe 7, a support frame 6 for sealing the flange pipe fixed to the bottom of the filter cylinder 4, and also includes a filtration mechanism 1, an outlet mechanism 2, and a push mechanism 3. The filtration mechanism 1 is located inside the filter cylinder 4, the outlet mechanism 2 is located below the filtration mechanism 1, and the push mechanism 3 is located at the bottom side of the filter cylinder 4.

[0035] In this embodiment: the filter mechanism 1 includes a fixed plate 11, with four filter bags 12 fixed to the bottom of the fixed plate 11. Each filter bag 12 is provided with a scraper seat 13. Three upper scrapers 14 and three lower scrapers 15 are rotatably connected to the outside of each scraper seat 13. Six rubber strips 16 are fixed to the top of the scraper seat 13. The fixed plate 11 is fixedly connected to the filter cylinder 4. The three upper scrapers 14 and three lower scrapers 15 are arranged alternately. The lower ends of the six rubber strips 16 are respectively fixed to the upper side of the three upper scrapers 14 and three lower scrapers 15. The four filter bags 12 on the fixed plate 11 are used to filter the dust in the flue gas. At the same time, the pushing mechanism 3 is used to push each scraper seat 13 to move up and down in the corresponding filter bag 12. During movement, the flue gas inside the filter bag 12 is blown from top to bottom. During this process, the scraper seat 13 moves in the opposite direction to the flow of the flue gas. Therefore, the three upper scrapers 14 and three lower scrapers 15 on the outside of the scraper seat 13 come together downwards. At the same time, the six rubber strips 16 on the top of the scraper seat 13 are stretched to prevent the dust attached to the filter bag 12 from being scraped off. When the scraper seat 13 moves downwards, since the direction of movement of the scraper seat 13 is the same as the direction of flue gas flow, and under the pull of the six rubber strips 16, the three lower scrapers 15 and three upper scrapers 14 on the scraper seat 13 unfold outwards. Then, the outer edges of the upper scrapers 14 and lower scrapers 15 come into contact with the side wall of the filter bag 12, thereby scraping the dust on the inner wall of the filter bag 12 to the bottom of the filter bag 12.

[0036] In this embodiment: the discharge mechanism 2 includes a sliding plate 25 and a discharge pipe 21. Four dust collection seats 24 are fixed on the sliding plate 25. The upper end of the dust collection seat 24 extends into the bottom of the filter bag 12. The dust collection seat 24 has a hollow structure. The discharge pipe 21 is located below the sliding plate 25. A dust discharge ball valve 23 is fixed at one end of the discharge pipe 21 that extends out of the filter cylinder 4. Four dust discharge branch pipes 22 for connecting the dust collection seats 24 are provided on the upper side of the discharge pipe 21. A slot is opened at one end of the dust collection seat 24 that extends out of the filter bag 12. By opening the dust discharge ball valve 23, the smoke in the filter bag 12 is blown into the hollow structure of the dust collection seat 24 through the slot. Then, the dust is guided into the discharge pipe 21 by the dust discharge branch pipes 22 and sprayed out from the dust discharge ball valve 23 at the front of the discharge pipe 21. In addition, when the scraper seat 13 falls and hits the dust collection seat 24, it will generate a certain degree of shaking on the filter bag 12. The dust is shaken off by the shaking of the filter bag 12.

[0037] In this embodiment: the pushing mechanism 3 includes a rotating frame 31, with two arc-shaped seats 32 fixed on the top of the rotating frame 31. Four push rods 33 are provided on the upper side of the rotating frame 31. The upper ends of the push rods 33 are fixed to the bottom of the scraping seat 13. A drive shaft 34 is fixed at the bottom of the rotating frame 31. A drive motor 35 is fixed at the lower end of the drive shaft 34. A sliding hole for the push rods 33 to slide up and down is opened in the center of the dust collection seat 24. The drive motor 35 drives the drive shaft 34 to rotate, and the drive shaft 34 drives the rotating frame 31 to rotate inside the filter cylinder 4. The rotation of the rotating frame 31 drives the two arc-shaped seats 32 to rotate alternately from the bottom of the four push rods 33, thereby pushing the four push rods 33 to push upward alternately, thus completing the up and down reciprocating movement of the scraping seat 13.

[0038] Working principle: When in use, first install the air inlet pipe of the filter cylinder 4 to the exhaust end of the gas boiler. At this time, the flue gas will flow from the air inlet pipe of the filter cylinder 4 to the upper side of the fixed plate 11. As the flue gas is continuously supplied, the flue gas enters the four filter bags 12 from top to bottom and filters the dust in the flue gas through the four filter bags 12. The filtered flue gas will enter the lower side of the filter bags 12 and be discharged through the exhaust pipe, thus completing the flue gas filtration process. The moisture in the filtration process is collected at the flange pipe at the bottom of the filter cylinder 4 and discharged through the drain pipe 7 at the flange pipe.

[0039] When it is necessary to clean the dust attached to the filter bag 12, the drive motor 35 drives the drive shaft 34 to rotate, and the drive shaft 34 drives the rotating frame 31 to rotate inside the filter cylinder 4. The rotation of the rotating frame 31 drives the two arc-shaped seats 32 to rotate alternately from the bottom of the four top rods 33, thereby pushing the four top rods 33 to push upward alternately, and then completing the up-and-down reciprocating movement of the scraping seat 13.

[0040] As the scraper seat 13 moves upward, the flue gas inside the filter bag 12 is blown downward. During this process, the scraper seat 13 moves in the opposite direction to the flow of the flue gas. Therefore, the blowing force of the flue gas will blow the three upper scraper plates 14 and the three lower scraper plates 15 on the outside of the scraper seat 13 downward, so that the three upper scraper plates 14 and the three lower scraper plates 15 close together downward and do not contact the inner wall of the filter bag 12. At the same time, the six rubber strips 16 on the top of the scraper seat 13 are stretched to prevent the dust attached to the filter bag 12 from being scraped off.

[0041] As the scraper seat 13 moves downward, since the scraper seat 13 moves in the same direction as the flue gas flow, and is pulled by the six rubber strips 16, the three lower scrapers 15 and the three upper scrapers 14 on the scraper seat 13 unfold outward, and then the outer edges of the upper scrapers 14 and the lower scrapers 15 come into contact with the side wall of the filter bag 12, and then scrape the dust on the inner wall of the filter bag 12 to the bottom of the filter bag 12, and the scraped dust will gather near the groove of the dust collection seat 24.

[0042] When a certain amount of smoke and dust accumulates at the dust collection seat 24 of each filter bag 12, the dust discharge ball valve 23 is opened to allow the smoke inside the filter bag 12 to be blown into the hollow structure of the dust collection seat 24 through the slot. Then, the dust is guided into the outlet pipe 21 by the dust discharge branch pipe 22 and sprayed out from the dust discharge ball valve 23 at the front of the outlet pipe 21. In addition, when the scraper seat 13 falls and hits the dust collection seat 24, it will cause a certain degree of shaking on the filter bag 12, and the dust will be shaken off by the shaking of the filter bag 12.

[0043] The above description is merely a specific embodiment of this utility model, and the various examples do not constitute a limitation on the substantive content of this utility model.

Claims

1. A flue gas filtering device for gas boilers, comprising a filtering cartridge (4) having a top part fixed with a cover plate (5), characterized in that: It also includes a filter mechanism (1), an outlet mechanism (2) and a push mechanism (3). The filter mechanism (1) is located inside the filter cylinder (4), the outlet mechanism (2) is located below the filter mechanism (1), and the push mechanism (3) is located at the bottom of the filter cylinder (4). The filtration mechanism (1) includes a fixed plate (11), and four filter bags (12) are fixed at the bottom of the fixed plate (11). Each filter bag (12) is provided with a scraper seat (13). Three upper scrapers (14) and three lower scrapers (15) are rotatably connected to the outside of each scraper seat (13). Six rubber strips (16) are fixed at the top of the scraper seat (13). The discharge mechanism (2) includes a sliding plate (25), on which four dust collection seats (24) are fixed. The upper end of the dust collection seat (24) extends into the bottom of the filter bag (12), and the dust collection seat (24) has a hollow structure. The pushing mechanism (3) includes a rotating frame (31), with two arc-shaped seats (32) fixed on the top of the rotating frame (31). Four push rods (33) are provided on the upper side of the rotating frame (31). The upper end of the push rods (33) is fixed to the bottom of the scraper seat (13). A driving component is provided at the bottom of the rotating frame (31).

2. A flue gas filtering device for gas boilers according to claim 1, characterized in that: The fixing plate (11) is fixedly connected to the filter cylinder (4), and the three upper scrapers (14) and the three lower scrapers (15) are arranged alternately.

3. A flue gas filtering device for gas boilers according to claim 1, characterized in that: The lower ends of the six rubber strips (16) are respectively fixed to the upper side of the three upper scrapers (14) and the three lower scrapers (15).

4. A flue gas filtering device for gas boilers according to claim 1, characterized in that: The vacuum cleaner seat (24) has a sliding hole in the center for the top rod (33) to slide up and down, and the end of the vacuum cleaner seat (24) that extends into the filter bag (12) has a slot.

5. A flue gas filtering device for gas boilers according to claim 1, characterized in that: The discharge mechanism (2) also includes a discharge pipe (21), which is located below the sliding plate (25). A dust discharge ball valve (23) is fixed at one end of the discharge pipe (21) that extends out of the filter cylinder (4). Four dust discharge branch pipes (22) for connecting the dust collection seat (24) are provided on the upper side of the discharge pipe (21).

6. The flue gas filtration device for a gas-fired boiler according to claim 1, characterized in that: The drive assembly includes a drive shaft (34), the upper end of which is fixed to the bottom of the rotating frame (31), and a drive motor (35) is fixedly installed at the lower end of the drive shaft (34).

7. A flue gas filtering device for gas boilers according to claim 1, characterized in that: The filter cylinder (4) has an inlet pipe welded to its upper side and an outlet pipe welded to its lower side. A flange pipe is welded to the bottom of the filter cylinder (4), and a drain pipe (7) is welded to the side of the flange pipe. A drain valve is installed at the end of the drain pipe (7). A support frame (6) for sealing the flange pipe is fixed to the bottom of the filter cylinder (4).

Images