A biomass pyrolysis gasification gas purification device

Abstract

The present invention relates to the field of biomass fuel gas purification technology, and specifically to a biomass pyrolysis gasification gas purification device, comprising a connecting pipe, an intermittent air suction mechanism, a dust removal mechanism, a dust collection mechanism and a connecting mechanism, wherein the top of the connecting pipe is connected to a debris removal pipe, the outer wall of the debris removal pipe is connected to a trapezoidal inclined pipe, the top outer wall of the trapezoidal inclined pipe is fixedly connected to three evenly distributed atomizing nozzles, the outer wall of the cooling water pipe is connected to an annular water pipe, and a return water pipe is connected between the annular water pipe and the cooling water pipe. The present invention uses the action of water flow to cause a closed circular plate, a curved pipe and a plurality of perforated circular plates to slide along the inner wall of the annular water pipe, so that a negative pressure fan absorbs the flue gas under negative pressure, thereby accelerating the purification speed of the flue gas, and when the curved pipe does not push the circumferential plate, the restoring force of the annular spring causes the upper edge of the cleaning frame to contact the bottom surface of the filter screen, scraping off the large particles of impurities trapped on the bottom surface of the filter screen and collecting them into the cleaning frame, thereby achieving the dual effects of accelerated flue gas purification and automatic dust collection.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass fuel gas purification, and in particular to a biomass pyrolysis gasification gas purification device. Background Art

[0002] Biomass refers to various organisms formed through photosynthesis using the atmosphere, water, land, etc. In a broad sense, biomass includes all plants, microorganisms, animals that feed on plants and microorganisms, and the waste they produce. In a narrow sense, biomass mainly refers to materials such as straw, trees, and other wood cellulose, agricultural product processing industry waste, agricultural and forestry waste, and livestock manure. However, the high-temperature dust removal device in the existing biomass wood chip and biomass gas has a poor dust removal effect during use. When the biomass fuel is gasified, a large amount of smoke and evaporated oil smoke are generated inside, which will cause a large amount of adhesion inside the exhaust pipe, thereby increasing the resistance of the airflow during circulation. After long-term use, the gas flowability of the dust removal pipe is reduced, resulting in a reduction in the dust removal effect.

[0003] The patent with announcement number CN117903852B discloses a high-temperature dust removal device for a biomass gasification furnace, including an air collecting hood, a cooling pipe is fixedly connected to the upper side of the air collecting hood, an outer enclosure is fixedly connected to the outer wall of the cooling pipe, the outer enclosure is an annular structure, and the middle part of the outer enclosure does not contact the outer wall of the cooling pipe, a water inlet pipe is fixedly connected to one side of the outer enclosure, and the water inlet pipe connects the outer enclosure, the cooling pipe and the outside of the outer enclosure, a mounting hole is opened on the side wall of the cooling pipe in the middle of the outer enclosure, and a fixing seat is fixedly connected to the inner wall of the mounting hole. The present invention is provided with a moving mechanism.

[0004] However, the above-mentioned method still has some shortcomings in actual use: 1. Through the spraying of a layer of atomizing nozzles, part of the flue gas can easily escape from the gaps and cannot be purified; 2. Only part of the sewage will be sprayed onto the surface of the gathering hood and flow along the surface of the gathering hood to the inside of the cooling hood and be discharged. However, most of the sewage still remains inside the connecting pipe, and the large particles of impurities contained in the flue gas are not processed, so they are very likely to remain inside the connecting pipe. Therefore, a biomass pyrolysis gasification gas purification device is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the background technology and to propose a biomass pyrolysis gasification gas purification device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A biomass pyrolysis gasification gas purification device includes a connecting pipe, the top of the connecting pipe is connected to a debris removal pipe, the outer wall of the debris removal pipe is connected to a trapezoidal inclined pipe, the outer wall of the trapezoidal inclined pipe is connected to an exhaust pipe, the bottom outer wall of the trapezoidal inclined pipe is connected to a sewage pipe, three evenly distributed atomizing nozzles are fixedly connected to the top outer wall of the trapezoidal inclined pipe, the outer wall of each atomizing nozzle is fixedly connected to a purification branch pipe, and the three purification branch pipes are all fixedly connected to the same trapezoidal inclined pipe, the outer wall of the cooling water pipe is connected to an annular water pipe, and a return water pipe is connected between the annular water pipe and the cooling water pipe, and further includes:

[0008] The intermittent air suction mechanism includes a curved pipe, a closed circular plate, and a plurality of perforated circular plates. The curved pipe is arranged inside the annular water pipe. The closed circular plate is fixedly connected to the end of the curved pipe. The plurality of perforated circular plates are fixedly connected to the outer wall of the curved pipe.

[0009] The dust removal mechanism includes a circular outer slide, a circular inner rack and a dust cleaning frame. The circular outer slide and the circular inner rack are fixedly connected to the inner wall of the impurity removal pipe through a bracket, and the dust cleaning frame is arranged inside the impurity removal pipe;

[0010] The dust collection mechanism includes two opening and closing plates, two second gears and two third shafts, the two second gears are respectively fixedly connected to the third shafts, the two third shafts are rotatably connected to the dust cleaning frame, and the two opening and closing plates are respectively fixedly connected to the two third shafts;

[0011] And a connecting mechanism which is slidably connected to the outer wall of the debris removal pipe.

[0012] Preferably, the outer wall of the annular water pipe is connected to a connecting cavity, the outer wall of the connecting cavity is rotatably connected to a second shaft rod, the second shaft rod is rotatably connected to the debris removal pipe, a rotating circumferential dial plate is provided inside the connecting cavity, the rotating circumferential dial plate is fixedly connected to the second shaft rod, the end of the second shaft rod is rotatably connected to a one-way rotating bearing, the end of the one-way rotating bearing is rotatably connected to a mounting bracket, and the mounting bracket is fixedly connected to the debris removal pipe.

[0013] Preferably, the outer wall of the one-way rotating bearing is fixedly connected to a large gear, the outer wall of the large gear is meshed with a small gear, the outer wall of the small gear is fixedly connected to a first shaft, and the other end of the first shaft is fixedly connected to a negative pressure fan.

[0014] Preferably, the inner wall of the impurity removal pipe is slidably connected to a filter frame, the inner wall of the filter frame is fixedly connected to a filter screen, and the inner wall on the other side of the impurity removal pipe is slidably connected to a dust collecting chamber, and the dust collecting chamber is arranged below the cleaning frame.

[0015] Preferably, the connecting mechanism includes a transmission gear, a first rack, a connecting rod 1 and a sealing slide, the transmission gear is fixedly connected to the second shaft, the outer wall of the transmission gear is fixedly connected to the first rack, the first rack is slidably connected to the outer wall of the debris removal pipe, the first rack is fixedly connected to the connecting rod 1, the connecting rod 1 is fixedly connected to the sealing slide, and the sealing slide is slidably connected to the debris removal pipe.

[0016] Preferably, the outer wall of one end of the second shaft away from the transmission gear is fixedly connected to a connecting plate, a fixing plate is provided on one side of the connecting plate, the fixing plate is fixedly connected to the debris removal pipe, limiting rings are fixed to the outer walls on both sides of the fixing plate, the limiting rings are slidably connected to the inner wall of the connecting plate, an annular spring is provided around the outer side of the limiting ring, and the annular spring is fixedly connected to the connecting plate and the fixing plate.

[0017] Preferably, the inner wall of the sealing slide is fixedly connected to a fixed rod, the inner wall of the fixed rod is slidably connected to a sliding rod, the end of the sliding rod is fixedly connected to a limiting gear, the limiting gear is engaged with the circular inner rack, the limiting gear is fixedly connected to a slider through a one-way bearing, and the slider is fixedly connected to the cleaning frame.

[0018] Preferably, the outer wall of the cleaning frame is slidably connected to a second rack, the outer wall of the second rack is meshed with a first gear, the first gear is fixedly connected to one of the third shafts, and a first spring is fixedly connected between the second rack and the cleaning frame.

[0019] Compared with the existing technology, the present invention has the following beneficial effects:

[0020] The present invention arranges a cooling water pipe, an annular water pipe and a return water pipe to cause the closed circular plate, the curved pipe and a number of perforated circular plates to slide along the inner wall of the annular water pipe, thereby driving the small gear to rotate through the large gear, so that the negative pressure fan absorbs the flue gas under negative pressure, thereby accelerating the purification of the flue gas. There is no need to arrange smoking equipment such as a blower, and when the curved pipe does not push the circumferential paddle, the restoring force of the annular spring causes the upper edge of the cleaning frame to contact the bottom surface of the filter screen, scraping off the large particles of impurities trapped on the bottom surface of the filter screen and collecting them into the cleaning frame. Subsequently, the impurities inside the frame are collected into the dust collecting chamber, and the flow of water achieves the dual effects of accelerated flue gas purification and automatic dust collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention Figure 2 ;

[0023] Figure 3It is a schematic diagram of the structure inside the annular water pipe of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the present invention after removing the large gear and the small gear;

[0025] Figure 5 This is a schematic diagram of the internal structure of the impurity removal pipe of the present invention;

[0026] Figure 6 This is a schematic structural diagram of the circular outer slideway of the present invention;

[0027] Figure 7 This invention Figure 6 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 8 It is a structural schematic diagram of the bottom of the dust cleaning frame of the present invention;

[0029] Figure 9 This invention Figure 8 A schematic diagram of the partially enlarged structure at point B in the middle;

[0030] Figure 10 This invention Figure 8 Schematic diagram of the partially enlarged structure at point C in the middle.

[0031] Figure: 1, connecting pipe; 2, debris removal pipe; 3, first spring; 4, annular water pipe; 5, return pipe; 6, atomizing nozzle; 7, purification branch pipe; 8, cooling water pipe; 9, trapezoidal inclined pipe; 10, exhaust pipe; 11, sewage pipe; 12, connecting chamber; 13, mounting bracket; 14, large gear; 15, small gear; 16, sealing slide; 17, connecting rod 1; 18, dust collecting chamber; 19, first rack; 20, transmission gear; 21, one-way rotating bearing; 22, rotating circular plate; 23, filter frame; 24, closed circular plate; 25, perforated circular plate; 26, curved Tube; 27, first gear; 28, fixing rod; 29, first shaft; 30, second shaft; 31, annular spring; 32, limiting ring; 33, connecting plate; 34, fixing plate; 35, negative pressure fan; 36, filter; 37, circular outer slide; 38, circular inner rack; 39, cleaning frame; 40, sliding rod; 41, limiting gear; 42, slider; 43, opening and closing plate; 44, second rack; 45, third shaft; 46, second gear; 101, intermittent suction mechanism; 202, dust removal mechanism; 303, dust collection mechanism; 404, connecting mechanism. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] Reference Figure 1 - Figure 10 A biomass pyrolysis gasification gas purification device includes a connecting pipe 1, the top of the connecting pipe 1 is connected to a debris removal pipe 2, the outer wall of the debris removal pipe 2 is connected to a trapezoidal inclined pipe 9, the outer wall of the trapezoidal inclined pipe 9 is connected to an exhaust pipe 10, the bottom outer wall of the trapezoidal inclined pipe 9 is connected to a sewage pipe 11, the top outer wall of the trapezoidal inclined pipe 9 is fixedly connected to three evenly distributed atomizing nozzles 6, the outer wall of each atomizing nozzle 6 is fixedly connected to a purification branch pipe 7, and the three purification branch pipes 7 are all fixedly connected to the same trapezoidal inclined pipe 9, the outer wall of the cooling water pipe 8 is connected to an annular water pipe 4, and a return water pipe 5 is connected between the annular water pipe 4 and the cooling water pipe 8, and further includes:

[0035] The intermittent air suction mechanism 101 includes a curved pipe 26, a closed circular plate 24, and a plurality of perforated circular plates 25. The curved pipe 26 is disposed inside the annular water pipe 4. The closed circular plate 24 is fixedly connected to the end of the curved pipe 26. The plurality of perforated circular plates 25 are fixedly connected to the outer wall of the curved pipe 26.

[0036] The dust removal mechanism 202 includes a circular outer slide 37, a circular inner rack 38, and a dust cleaning frame 39. The circular outer slide 37 and the circular inner rack 38 are fixedly connected to the inner wall of the impurity removal pipe 2 through a bracket. The dust cleaning frame 39 is arranged inside the impurity removal pipe 2.

[0037] The dust collection mechanism 303 includes two opening and closing plates 43, two second gears 46, and two third shafts 45. The two second gears 46 are respectively fixedly connected to the third shafts 45. The two third shafts 45 are rotatably connected to the dust cleaning frame 39. The two opening and closing plates 43 are respectively fixedly connected to the two third shafts 45.

[0038] And a connection mechanism 404 that is slidably connected to the outer wall of the impurity removal pipe 2.

[0039] In this embodiment, the specific working principle and usage method of the present invention are explained in detail below: When in use, the connecting pipe 1 is connected to the exhaust of the biomass gas, the condensed water is input from the cooling water pipe 8, the sewage flue gas enters the trapezoidal inclined pipe 9 through the connecting pipe 1 and the impurity removal pipe 2, the large particles of impurities in the flue gas are intercepted by the filter 36, the condensed water flows from the purification branch pipe 7 into the atomizing nozzle 6, the flue gas passes through the three atomizing nozzles 6 in turn for purification, to avoid incomplete purification of the flue gas, and finally the sewage is discharged from the sewage pipe 11 and the gas is discharged from the exhaust pipe 10.

[0040] Among them, the outer wall of the annular water pipe 4 is connected to the connecting cavity 12, the outer wall of the connecting cavity 12 is rotatably connected to the second shaft rod 30, the second shaft rod 30 is rotatably connected to the debris removal pipe 2, and a rotating circumferential dial plate 22 is provided inside the connecting cavity 12, the rotating circumferential dial plate 22 is fixedly connected to the second shaft rod 30, the end of the second shaft rod 30 is rotatably connected to the one-way rotating bearing 21, the end of the one-way rotating bearing 21 is rotatably connected to the mounting bracket 13, and the mounting bracket 13 is fixedly connected to the debris removal pipe 2.

[0041] The outer wall of the one-way rotating bearing 21 is fixedly connected to the large gear 14 , the outer wall of the large gear 14 is meshed with the small gear 15 , the outer wall of the small gear 15 is fixedly connected to the first shaft 29 , and the other end of the first shaft 29 is fixedly connected to the negative pressure fan 35 .

[0042] In this embodiment, when water flows through the cooling water pipe 8 and the annular water pipe 4 and then flows into the cooling water pipe 8 through the return pipe 5 and returns to the annular water pipe 4, since the outer wall of the closed circular plate 24 is consistent with the inner diameter of the annular water pipe 4, the closed circular plate 24 and the curved pipe 26 and several perforated circular plates 25 will slide along the inner wall of the annular water pipe 4. At the same time, when the closed circular plate 24 and the perforated circular plate 25 rotate through the rotating circumferential dial plate 22, the rotating circumferential dial plate 22 will be driven to rotate one circle, so that the rotating circumferential dial plate 22 drives the second shaft rod 30 to rotate, and the second shaft rod 30 drives the large gear 14 to rotate through the one-way rotating bearing 21. The large gear 14 drives the first shaft rod 29 and the negative pressure fan 35 to rotate several circles through the small gear 15, so that the negative pressure fan 35 absorbs the smoke under negative pressure and accelerates its discharge below the atomizing nozzle 6, thereby speeding up the purification of the smoke and eliminating the need to set up smoking equipment such as a fan.

[0043] Among them, the inner wall of the impurity removal pipe 2 is slidably connected to a filter frame 23, the inner wall of the filter frame 23 is fixedly connected to a filter screen 36, and the inner wall on the other side of the impurity removal pipe 2 is slidably connected to a dust collecting chamber 18, which is arranged below the cleaning frame 39.

[0044] Among them, the connecting mechanism 404 includes a transmission gear 20, a first rack 19, a connecting rod 17 and a sealing slide 16. The transmission gear 20 is fixedly connected to the second shaft 30, the outer wall of the transmission gear 20 is fixedly connected to the first rack 19, the first rack 19 is slidingly connected to the outer wall of the debris removal pipe 2, the first rack 19 is fixedly connected to the connecting rod 17, the connecting rod 17 is fixedly connected to the sealing slide 16, and the sealing slide 16 is slidingly connected to the debris removal pipe 2.

[0045] Among them, the outer wall of one end of the second shaft 30 away from the transmission gear 20 is fixedly connected with a connecting plate 33, and a fixing plate 34 is provided on one side of the connecting plate 33. The fixing plate 34 is fixedly connected to the debris removal pipe 2, and the outer walls on both sides of the fixing plate 34 are fixed with limiting rings 32. The limiting rings 32 are slidingly connected to the inner wall of the connecting plate 33. An annular spring 31 is provided around the outer side of the limiting ring 32, and the annular spring 31 is fixedly connected to the connecting plate 33 and the fixing plate 34.

[0046] Among them, the inner wall of the sealing slide 16 is fixedly connected to the fixed rod 28, the inner wall of the fixed rod 28 is slidably connected to the sliding rod 40, the end of the sliding rod 40 is fixedly connected to the limiting gear 41, the limiting gear 41 is engaged with the circular inner rack frame 38, the limiting gear 41 is fixedly connected to the slider 42 through a one-way bearing, and the slider 42 is fixedly connected to the cleaning frame 39.

[0047] Among them, the outer wall of the cleaning frame 39 is slidably connected to the second rack 44, the outer wall of the second rack 44 is engaged with the first gear 27, the first gear 27 is fixedly connected to one of the third shafts 45, and the first spring 3 is fixedly connected between the second rack 44 and the cleaning frame 39.

[0048] In this embodiment, the second shaft 30 drives the transmission gear 20 to rotate at the same time, so that it drives the first rack 19 and the connecting rod 17 to move, and drives the sealing slide 16 and the fixed rod 28 to move. Since the limit gear 41 is a one-way bearing connection, the limit gear 41 will move in a circle along the circular outer slide 37 and the circular inner rack frame 38. At this time, the limit gear 41 moves along the lower part of the circular outer slide 37 and the circular inner rack frame 38, and the upper edge of the cleaning frame 39 will not contact the bottom surface of the filter 36. When the end of the second rack 44 conflicts with the inner wall of the impurity removal pipe 2, the second rack 44 drives the first gear 27 to rotate, and the first gear 27 drives the two third shafts 45 and the opening and closing plate 43 to open through two mutually meshing second gears 46, and collects the impurities inside them into the dust collecting chamber 18.

[0049] Then, when the bend 26 rotates to the other half of the annular water pipe 4, the second shaft 30 is restored by the force of the annular spring 31. At this time, the second shaft 30 drives the transmission gear 20 to rotate, so that the limit gear 41 moves along the upper part of the circular outer slide 37 and the circular inner rack 38. The upper edge of the cleaning frame 39 contacts the bottom surface of the filter 36, scraping off the large particles of impurities trapped on the bottom surface of the filter 36 and storing them in the cleaning frame 39.

[0050] The specific working principle and usage method of the present invention are explained in detail below: When in use, the connecting pipe 1 is connected to the exhaust of the biomass gas, the condensed water is input from the cooling water pipe 8, the sewage flue gas enters the trapezoidal inclined pipe 9 through the connecting pipe 1 and the impurity removal pipe 2, the large particles of impurities in the flue gas are intercepted by the filter 36, the condensed water flows from the purification branch pipe 7 into the atomizing nozzle 6, the flue gas passes through the three atomizing nozzles 6 in turn, and is purified to avoid incomplete flue gas purification. Finally, the sewage is discharged from the sewage pipe 11 and the gas is discharged from the exhaust pipe 10.

[0051] In the process of water flowing through the cooling water pipe 8 and the annular water pipe 4 and then flowing into the cooling water pipe 8 and returning to the annular water pipe 4 through the return pipe 5, since the outer wall of the closed circular plate 24 is consistent with the inner diameter of the annular water pipe 4, the closed circular plate 24, the curved pipe 26 and the several perforated circular plates 25 will slide along the inner wall of the annular water pipe 4. At the same time, when the closed circular plate 24 and the perforated circular plate 25 rotate through the rotating circumferential dial plate 22, the rotating circumferential dial plate 22 will be driven to rotate one circle, so that the rotating circumferential dial plate 22 drives the second shaft rod 30 to rotate, and the second shaft rod 30 drives the large gear 14 to rotate through the one-way rotating bearing 21, and the large gear 14 drives the first shaft rod 29 and the negative pressure fan 35 to rotate several circles through the small gear 15, so that the negative pressure fan 35 absorbs the smoke under negative pressure and accelerates its discharge below the atomizing nozzle 6, thereby speeding up the purification of the smoke and eliminating the need to set up smoking equipment such as a fan.

[0052] At the same time, the second shaft 30 drives the transmission gear 20 to rotate, so that it drives the first rack 19 and the connecting rod 17 to move, and drives the sealing slide 16 and the fixed rod 28 to move. Since the limit gear 41 is a one-way bearing connection, the limit gear 41 will move in a circle along the circular outer slide 37 and the circular inner rack frame 38. At this time, the limit gear 41 moves along the circular outer slide 37 and the lower part of the circular inner rack frame 38. The upper edge of the cleaning frame 39 will not contact the bottom surface of the filter 36. When the end of the second rack 44 conflicts with the inner wall of the impurity removal pipe 2, the second rack 44 drives the first gear 27 to rotate, and the first gear 27 drives the two third shafts 45 and the opening and closing plate 43 to open through two mutually meshing second gears 46, collecting the impurities inside them into the dust collecting chamber 18.

[0053] Then, when the bend 26 rotates to the other half of the annular water pipe 4, the second shaft 30 is restored by the force of the annular spring 31. At this time, the second shaft 30 drives the transmission gear 20 to rotate, so that the limit gear 41 moves along the upper part of the circular outer slide 37 and the circular inner rack 38. The upper edge of the cleaning frame 39 contacts the bottom surface of the filter 36, scraping off the large particles of impurities trapped on the bottom surface of the filter 36 and storing them in the cleaning frame 39.

[0054] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0055] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A biomass pyrolysis gasification gas purification device, comprising a connecting pipe (1), the top of the connecting pipe (1) is connected to a debris removal pipe (2), the outer wall of the debris removal pipe (2) is connected to a trapezoidal inclined pipe (9), the outer wall of the trapezoidal inclined pipe (9) is connected to an exhaust pipe (10), the bottom outer wall of the trapezoidal inclined pipe (9) is connected to a sewage pipe (11), the top outer wall of the trapezoidal inclined pipe (9) is fixedly connected to three evenly distributed atomizing nozzles (6), the outer wall of each atomizing nozzle (6) is fixedly connected to a purification branch pipe (7), the three purification branch pipes (7) are all fixedly connected to the same trapezoidal inclined pipe (9), the outer wall of the cooling water pipe (8) is connected to an annular water pipe (4), a return water pipe (5) is connected between the annular water pipe (4) and the cooling water pipe (8), characterized in that Also includes: The intermittent air suction mechanism (101) comprises a curved pipe (26), a closed circular plate (24) and a plurality of perforated circular plates (25), wherein the curved pipe (26) is arranged inside the annular water pipe (4), the closed circular plate (24) is fixedly connected to the end of the curved pipe (26), and the plurality of perforated circular plates (25) are fixedly connected to the outer wall of the curved pipe (26); The dust removal mechanism (202) includes a circular outer slideway (37), a circular inner rack (38) and a dust cleaning frame (39), wherein the circular outer slideway (37) and the circular inner rack (38) are fixedly connected to the inner wall of the impurity removal pipe (2) through a bracket, and the dust cleaning frame (39) is arranged inside the impurity removal pipe (2); The dust collecting mechanism (303) includes two opening and closing plates (43), two second gears (46) and two third shafts (45), the two second gears (46) are fixedly connected to the third shafts (45), the two third shafts (45) are rotatably connected to the dust cleaning frame (39), and the two opening and closing plates (43) are fixedly connected to the two third shafts (45). and a connecting mechanism (404) slidably connected to the outer wall of the impurity removal pipe (2).

2. The biomass pyrolysis gasification gas purification device according to claim 1, characterized in that: The outer wall of the annular water pipe (4) is connected to a connecting cavity (12), the outer wall of the connecting cavity (12) is rotatably connected to a second shaft (30), the second shaft (30) is rotatably connected to the debris removal pipe (2), a rotating circumferential dial plate (22) is provided inside the connecting cavity (12), the rotating circumferential dial plate (22) is fixedly connected to the second shaft (30), the end of the second shaft (30) is rotatably connected to a one-way rotating bearing (21), the end of the one-way rotating bearing (21) is rotatably connected to a mounting bracket (13), and the mounting bracket (13) is fixedly connected to the debris removal pipe (2).

3. The biomass pyrolysis gasification gas purification device according to claim 2, characterized in that: The outer wall of the one-way rotating bearing (21) is fixedly connected to a large gear (14), the outer wall of the large gear (14) is meshed with a small gear (15), the outer wall of the small gear (15) is fixedly connected to a first shaft (29), and the other end of the first shaft (29) is fixedly connected to a negative pressure fan (35).

4. The biomass pyrolysis gasification gas purification device according to claim 3, characterized in that: The inner wall of the impurity removal pipe (2) is slidably connected to a filter frame (23), the inner wall of the filter frame (23) is fixedly connected to a filter screen (36), and the inner wall of the other side of the impurity removal pipe (2) is slidably connected to a dust collecting chamber (18), and the dust collecting chamber (18) is arranged below the dust cleaning frame (39).

5. The biomass pyrolysis gasification gas purification device according to claim 1, characterized in that: The connecting mechanism (404) includes a transmission gear (20), a first rack (19), a connecting rod (17) and a sealing slide (16); the transmission gear (20) is fixedly connected to the second shaft (30); the outer wall of the transmission gear (20) is fixedly connected to the first rack (19); the first rack (19) is slidably connected to the outer wall of the debris removal pipe (2); the first rack (19) is fixedly connected to the connecting rod (17); the connecting rod (17) is fixedly connected to the sealing slide (16); and the sealing slide (16) is slidably connected to the debris removal pipe (2).

6. The biomass pyrolysis gasification gas purification device according to claim 5, characterized in that: The outer wall of one end of the second shaft (30) away from the transmission gear (20) is fixedly connected to a connecting plate (33), a fixing plate (34) is provided on one side of the connecting plate (33), the fixing plate (34) is fixedly connected to the impurity removal pipe (2), and limiting rings (32) are fixed on the outer walls of both sides of the fixing plate (34), the limiting rings (32) are slidably connected to the inner wall of the connecting plate (33), an annular spring (31) is provided around the outer side of the limiting ring (32), and the annular spring (31) is fixedly connected to the connecting plate (33) and the fixing plate (34).

7. The biomass pyrolysis gasification gas purification device according to claim 5, characterized in that: The inner wall of the sealing slide plate (16) is fixedly connected to a fixed rod (28), the inner wall of the fixed rod (28) is slidably connected to a sliding rod (40), the end of the sliding rod (40) is fixedly connected to a limit gear (41), the limit gear (41) is engaged with a circular inner rack (38), the limit gear (41) is fixedly connected to a slider (42) through a one-way bearing, and the slider (42) is fixedly connected to the dust cleaning frame (39).

8. The biomass pyrolysis gasification gas purification device according to claim 4, characterized in that: The outer wall of the cleaning frame (39) is slidably connected to a second rack (44), the outer wall of the second rack (44) is meshed with a first gear (27), the first gear (27) is fixedly connected to one of the third shafts (45), and a first spring (3) is fixedly connected between the second rack (44) and the cleaning frame (39).

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