Gas discharging device for biomass gasification furnace

Abstract

The present application relates to the technical fields of biomass gasification furnace, particularly relates to a kind of gas discharge device for biomass gasification furnace, including filter bucket and gasification furnace body, the side wall of filter bucket is fixedly connected with the link plate near gasification furnace body, pipeline one is communicated on the filter bucket, the gasification furnace body is communicated with pipeline two, the link plate is fixedly connected with the communicating pipe in, the movable pipe is installed and connected between the upper end of communicating pipe and pipeline one, the bottom end of communicating pipe is communicated with pipeline two.The gas discharge device for biomass gasification furnace provided in the present application, the industry core pain point of the gas discharge device for biomass gasification furnace is aimed at, realizes that gas pressure self-adapting adjustment, whole process self-cleaning and automatic integrated design of waste collection and discharge, improves the stability and security of gasification furnace operation, greatly reduces equipment loss and operation and maintenance cost, has extremely high popularization value in the field of biomass resource utilization.

Description

Technical Field

[0001] This invention relates to the field of biomass gasification furnace technology, specifically to a gas exhaust device for a biomass gasification furnace. Background Technology

[0002] Biomass gasification is a core technology for the resource utilization and reduction of agricultural and forestry organic waste. It can convert low-value biomass into clean, combustible gas, and has extremely high promotional value in the fields of distributed energy supply, rural clean heating, and industrial and agricultural solid waste disposal. The gas exhaust device is a core safety component of the biomass gasifier, playing a crucial role in gas pressure stabilization and transmission, impurity purification, and operational condition adaptation and safety protection. Its performance directly determines the gasifier's operational stability, safety level, and maintenance costs. Currently, mainstream gas exhaust devices in the industry generally adopt a multi-component discrete series architecture. Each functional unit can only achieve a single fixed effect, resulting in complex system piping, high overall flow resistance, and significant loss of gasifier gas production efficiency. Furthermore, the series connection of multiple components multiplies the number of failure points, significantly increasing the difficulty of assembly and maintenance.

[0003] The existing equipment has significant operational adaptability defects. The fixed-structure purification unit only has the best purification effect under the rated gas production flow rate. However, biomass gasifiers generally have the inherent characteristic of large fluctuations in gas production load. Under low-load conditions such as ignition and furnace shut-off, the gas flow rate is insufficient, and the dust removal and coking removal functions are completely ineffective. Under overpressure gas production conditions, it is impossible to achieve rapid pressure relief, which can easily lead to safety accidents such as furnace deformation and deflagration. At the same time, the existing conventional fixed pore flame arresters can only passively quench the flame and cannot cut off the gas passage from the source. The reliability of backfire prevention is insufficient, and the pores are easily blocked by tar and dust in the gas. Frequent manual disassembly and coking removal are required, resulting in a short maintenance cycle and making it difficult to meet the use requirements of long-term continuous and stable operation of gasifiers. Summary of the Invention

[0004] To address the aforementioned problems, the present invention provides a gas exhaust device for a biomass gasification furnace.

[0005] This invention adopts the following technical solution: a gas exhaust device for a biomass gasification furnace, comprising a filter barrel and a gasification furnace body. A connecting plate is fixedly connected to one side wall of the filter barrel near the gasification furnace body. A first pipe is connected to the filter barrel, and a second pipe is connected to the gasification furnace body. A connecting pipe is fixedly connected inside the connecting plate. A movable pipe is installed between the upper end of the connecting pipe and the first pipe. The lower end of the connecting pipe is connected to the second pipe. The device also includes:

[0006] The self-regulating mechanism is capable of automatically adjusting air pressure and self-cleaning, and the self-regulating mechanism is installed inside the connecting pipe;

[0007] And a sludge collection mechanism, which can automatically collect and discharge oil sludge, the sludge collection mechanism being installed inside the connecting pipe.

[0008] As a further description of the above technical solution: the self-adjusting mechanism includes a rotating ring, which is movably disposed within the inner cavity of the connecting pipe. A fixed guide post is fixedly connected to the inner wall of the movable pipe, and the fixed guide post is located at the center of the rotating ring. The rotating ring can rotate and move up and down. A flow guide fan is disposed inside the rotating ring. Rotating airbags are provided on both the inner and outer sides of the rotating ring. The rotating airbags are movably disposed within the rotating ring. A rotating ring is fixedly connected to the upper end of the rotating airbag. The rotating ring is rotatably disposed within the rotating ring. A torsion spring is fixedly connected between the side wall of the rotating ring and the rotating ring. A [missing information - likely a component or element] is fixedly connected to the upper end of the rotating ring. A connecting block has a fixing block on one side. The upper end of the fixing block is fixed to the rotating ring, and the lower end of the fixing block abuts against the upper end of the rotating ring. An air guide groove is connected between the connecting block, the rotating ring, and the rotating airbag. An air storage bag is provided on the upper side of the rotating airbag. One side wall of the air storage bag is fixed to the rotating ring. An air cavity is surrounded by the opposite ends of the connecting block and the fixing block. The air cavity is connected to the air storage bag. The outer space of the air storage bag is connected to the outer side of the rotating ring. A first connecting cavity is provided at the lower part of the inner wall of the connecting tube, and a second connecting cavity is provided at the upper part of the inner wall of the connecting tube. The inner diameter of the first connecting cavity is smaller than the inner diameter of the second connecting cavity.

[0009] As a further description of the above technical solution: the sludge collection mechanism includes a collection box, which is fixedly connected to the connecting plate and located below the connecting pipe. The lower end of the inner wall of the collection box has an inclined conical surface. An arc ring is formed on the upper side of the end of the collection box located inside the connecting plate. A scraper is rotatably installed inside the collection box. A discharge port is formed on the lower wall of the end of the collection box located outside the connecting plate, and a movable plug is installed in the discharge port. A fixed rod is fixedly connected to the inner wall of the collection box. A lever is fixedly connected to the bottom end of the rotating ring above the scraper. Both the bottom end of the lever and the upper end of the scraper have rounded corners. A guide groove is formed on the inner wall of the connecting pipe, and the guide groove is located directly above the arc ring.

[0010] As a further description of the above technical solution: the movable tube can be detached from pipe one and the connecting pipe.

[0011] As a further description of the above technical solution: when the rising airflow passes through the guide fan, it can drive the rotating ring to rotate.

[0012] As a further description of the above technical solution: the rotating airbag is made of wear-resistant material.

[0013] As a further description of the above technical solution: the toggle blocks are arranged in a ring with equal spacing.

[0014] As a further description of the above technical solution: the bottom end of the fixed guide post is inserted into the fixed rod from top to bottom.

[0015] This invention provides an improved gas exhaust device for a biomass gasification furnace, which, compared with the prior art, has the following improvements and advantages:

[0016] Firstly, this device achieves adaptive dynamic adjustment of gas pressure, significantly improving the adaptability and operational safety of the gasifier. Addressing the large fluctuations in gas production load of biomass gasifiers, the rotating ring rises and falls autonomously with the gas pressure, working in conjunction with a variable-diameter chamber. This allows for rapid pressure relief in case of overpressure, avoiding safety risks such as deflagration, and automatic pressure maintenance during low-load conditions, ensuring stable gas delivery. This solves the problem of poor adaptability of traditional fixed-structure devices. The design integrates pressure stabilization and relief functions, simplifies the pipeline architecture, reduces flow resistance and potential failure points, and effectively improves gas production efficiency.

[0017] Secondly, this device has all-dimensional self-cleaning and anti-clogging capabilities, significantly reducing equipment maintenance frequency and downtime costs. During gas transmission, the airflow drives the rotating ring to rotate, which, together with the rotating airbag, simultaneously scrapes and cleans the inner wall of the pipeline and the fixed guide column. The rotating ring moves up and down with the air pressure to further expand the cleaning range, achieving dynamic cleaning of the entire pipeline area. For dry and hard oil residue, the rotating airbag can achieve reverse intermittent scraping through deformation, enhancing the slag removal effect and fundamentally solving the problems of easy clogging and frequent manual cleaning required by traditional devices.

[0018] Thirdly, this device achieves automated collection and convenient discharge of oil, greatly improving equipment operation and maintenance efficiency. The oil is automatically guided to the collection box for centralized collection through the guide channel. During cleaning, there is no need to disassemble the main body of the equipment. Just open the movable plug and use the rotating ring to drive the scraper to rotate and discharge the oil. The inclined conical surface improves the thoroughness of the discharge. At the same time, the quick-release movable pipe design facilitates the inspection and replacement of core components. The integrated architecture greatly reduces the difficulty of equipment assembly and operation and maintenance.

[0019] In summary, this device addresses the core pain points of biomass gasifier exhaust systems by integrating adaptive gas pressure regulation, full-process self-cleaning, and automated waste collection and discharge. This not only improves the stability and safety of gasifier operation but also significantly reduces equipment wear and maintenance costs, making it highly valuable for promotion in the field of biomass resource utilization. Attached Figure Description

[0020] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

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

[0022] Figure 2 This is a three-dimensional sectional view of the connecting pipe provided in an embodiment of the present invention;

[0023] Figure 3 A perspective sectional view of the rotating ring provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the fixing block and the connecting block provided in an embodiment of the present invention;

[0025] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 6 for Figure 2 Enlarged view of point B in the middle;

[0027] Figure 7 for Figure 3 Enlarged view of point C in the middle;

[0028] Figure 8 for Figure 3 Enlarged view of point D in the middle.

[0029] In the diagram: 1. Filter barrel; 2. Gasifier body; 3. Connecting plate; 4. Pipe 1; 5. Pipe 2; 6. Movable pipe; 7. Connecting pipe; 8. Self-adjusting mechanism; 81. Rotating ring; 82. Fixed guide column; 83. Guide fan; 84. Rotating air bag; 85. Rotating ring; 86. Torsion spring; 87. Connecting block; 88. Air guide groove; 89. Fixed block; 810. Air storage bag; 811. Air chamber; 812. Connecting chamber 1; 813. Connecting chamber 2; 9. Sludge collection mechanism; 91. Collection box; 92. Inclined conical surface; 93. Arc ring; 94. Scraper; 95. Movable plug; 96. Fixed rod; 97. Pulley; 98. Rounded corner; 99. Guide groove. Detailed Implementation

[0030] To make the technical means, creative features, objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific illustrations. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Please see Figure 1 - Figure 8 This invention provides a technical solution: a gas exhaust device for a biomass gasification furnace, comprising a filter barrel 1 and a gasification furnace body 2. A connecting plate 3 is fixedly connected to one side wall of the filter barrel 1 near the gasification furnace body 2. A first pipe 4 is connected to the filter barrel 1, and a second pipe 5 is connected to the gasification furnace body 2. A connecting pipe 7 is fixedly connected inside the connecting plate 3. A movable pipe 6 is installed and connected between the upper end of the connecting pipe 7 and the first pipe 4. The bottom end of the connecting pipe 7 is connected to the second pipe 5. The device also includes:

[0032] The self-regulating mechanism 8 is capable of automatically adjusting air pressure and self-cleaning. The self-regulating mechanism 8 is located inside the connecting pipe 7.

[0033] And a sludge collection mechanism 9, which can automatically collect and discharge oil sludge, is installed inside the connecting pipe 7.

[0034] The movable tube 6 can be removed from pipe 4 and connecting pipe 7.

[0035] Specifically, this device achieves adaptive dynamic adjustment of gas pressure, significantly improving the adaptability and operational safety of the gasifier. Addressing the large fluctuations in gas production load of biomass gasifiers, the rotating ring 81 rises and falls autonomously with the gas pressure, working in conjunction with a variable-diameter chamber. This allows for rapid pressure relief in case of overpressure, mitigating safety risks such as deflagration, and automatic pressure maintenance under low load conditions, ensuring stable gas delivery. This solves the problem of poor adaptability in traditional fixed-structure devices. The design integrates pressure stabilization and relief functions, simplifies the pipeline architecture, reduces flow resistance and potential failure points, and effectively improves gas production efficiency.

[0036] This device has all-dimensional self-cleaning and anti-clogging capabilities, significantly reducing equipment maintenance frequency and downtime costs. During gas transmission, the airflow drives the rotating ring 81 to rotate, which, together with the rotating airbag 84, simultaneously scrapes and cleans the inner wall of the pipeline and the fixed guide column 82. The rotating ring 81 moves up and down with the air pressure to further expand the cleaning range, achieving dynamic cleaning of the entire pipeline area. For dry and hard oil residue, the rotating airbag 84 can achieve reverse intermittent scraping through deformation, enhancing the slag removal effect and fundamentally solving the problems of easy clogging and frequent manual cleaning required by traditional devices.

[0037] This device enables automated collection and convenient discharge of oil sludge, significantly improving equipment operation and maintenance efficiency. The oil sludge is automatically guided to the collection box 91 for centralized collection through the guide channel 99. During cleaning, there is no need to disassemble the main body of the equipment. Simply open the movable plug 95 and use the rotating ring 81 to drive the scraper 94 to rotate and discharge the oil sludge. The inclined conical surface 92 enhances the thoroughness of the discharge. At the same time, the quick-release movable pipe 6 design facilitates the inspection and replacement of core components. The integrated architecture greatly reduces the difficulty of equipment assembly and operation and maintenance.

[0038] In summary, this device addresses the core pain points of biomass gasifier exhaust systems by integrating adaptive gas pressure regulation, full-process self-cleaning, and automated waste collection and discharge. This not only improves the stability and safety of gasifier operation but also significantly reduces equipment wear and maintenance costs, making it highly valuable for promotion in the field of biomass resource utilization.

[0039] In another embodiment of the present invention, the self-adjusting mechanism 8 includes a rotating ring 81, which is movably disposed within the cavity of the connecting pipe 7. A fixed guide post 82 is fixedly connected to the inner wall of the movable pipe 6, and the fixed guide post 82 is located at the center of the rotating ring 81. The rotating ring 81 can rotate and move up and down. A guide fan 83 is disposed inside the rotating ring 81. Rotating airbags 84 are provided on both the inner and outer sides of the rotating ring 81. The rotating airbags 84 are movably disposed within the rotating ring 81. A rotating ring 85 is fixedly connected to the upper end of the rotating airbag 84. The rotating ring 85 is rotatably disposed within the rotating ring 81. A torsion spring 86 is fixedly connected between the side wall of the rotating ring 85 and the rotating ring 81. A connecting block 87 is fixedly connected to the upper end of the rotating ring 85. A fixing block 89 is provided on one side. The upper end of the fixing block 89 is fixedly connected to the rotating ring 81, and the lower end of the fixing block 89 abuts against the upper end of the rotating ring 85. A guide groove 88 is connected to the connecting block 87, the rotating ring 85 and the rotating airbag 84. An air storage bag 810 is provided on the upper side of the rotating airbag 84. One side wall of the air storage bag 810 is fixedly connected to the rotating ring 81. An air cavity 811 is surrounded by the opposite ends of the connecting block 87 and the fixing block 89. The air cavity 811 is connected to the air storage bag 810. The outer space of the air storage bag 810 is connected to the outer side of the rotating ring 81. A first connecting cavity 812 is provided in the lower part of the inner wall of the connecting pipe 7. A second connecting cavity 813 is provided in the upper part of the inner wall of the connecting pipe 7. The inner diameter of the first connecting cavity 812 is smaller than the inner diameter of the second connecting cavity 813.

[0040] The rising airflow can drive the rotating ring 81 to rotate when it passes through the guide fan 83.

[0041] The rotating airbag 84 is made of wear-resistant material.

[0042] Specifically, this device achieves adaptive dynamic adjustment of gas pressure, significantly improving the adaptability and operational safety of the gasifier. Addressing the large fluctuations in gas production load of biomass gasifiers, the rotating ring 81 rises and falls autonomously with the gas pressure, working in conjunction with a variable-diameter chamber. This allows for rapid pressure relief in case of overpressure, mitigating safety risks such as deflagration, and automatic pressure maintenance under low load conditions, ensuring stable gas delivery. This solves the problem of poor adaptability in traditional fixed-structure devices. The design integrates pressure stabilization and relief functions, simplifies the pipeline architecture, reduces flow resistance and potential failure points, and effectively improves gas production efficiency.

[0043] In another embodiment of the present invention, the sludge collection mechanism 9 includes a collection box 91, which is fixedly connected to the connecting plate 3. The collection box 91 is located below the connecting pipe 7. An inclined conical surface 92 is provided at the lower end of the inner wall of the collection box 91. An arc ring 93 is provided on the upper side of the end of the collection box 91 located inside the connecting plate 3. A scraper 94 is rotatably provided in the inner cavity of the collection box 91. A discharge port is provided on the lower wall of the end of the collection box 91 located outside the connecting plate 3, and a movable plug 95 is installed in the discharge port. A fixed rod 96 is fixedly connected to the inner wall of the collection box 91. A lever 97 is fixedly connected to the bottom end of the rotating ring 81 above the scraper 94. Both the bottom end of the lever 97 and the upper end of the scraper 94 are provided with rounded corners 98. A guide groove 99 is provided on the inner wall of the connecting pipe 7. The guide groove 99 is located directly above the arc ring 93.

[0044] The pusher blocks 97 are arranged in a ring with equal spacing.

[0045] The bottom ends of the fixed guide column 82 are inserted into the fixed rod 96.

[0046] Specifically, this device has all-dimensional self-cleaning and anti-clogging capabilities, significantly reducing equipment maintenance frequency and downtime costs. During gas transmission, the airflow drives the rotating ring 81 to rotate, which, together with the rotating airbag 84, simultaneously scrapes and cleans the inner wall of the pipeline and the fixed guide column 82. The rotating ring 81 moves up and down with the air pressure to further expand the cleaning range, achieving dynamic cleaning of the entire pipeline area. For dry and hard oil residue, the rotating airbag 84 can achieve reverse intermittent scraping through deformation, enhancing the slag removal effect and fundamentally solving the problems of easy clogging and frequent manual cleaning required by traditional devices.

[0047] This device enables automated collection and convenient discharge of oil sludge, significantly improving equipment operation and maintenance efficiency. The oil sludge is automatically guided to the collection box 91 for centralized collection through the guide channel 99. During cleaning, there is no need to disassemble the main body of the equipment. Simply open the movable plug 95 and use the rotating ring 81 to drive the scraper 94 to rotate and discharge the oil sludge. The inclined conical surface 92 enhances the thoroughness of the discharge. At the same time, the quick-release movable pipe 6 design facilitates the inspection and replacement of core components. The integrated architecture greatly reduces the difficulty of equipment assembly and operation and maintenance.

[0048] Working principle: When using this device, the gasifier body 2 generates gas during operation. The gas flows through pipe 2 5, connecting pipe 7, movable pipe 6 and pipe 1 4, and is introduced into the filter barrel 1 for filtration. The pressure of the gas generated in the gasifier body 2 will change. When the gas pressure in the connecting pipe 7 increases, the rotating ring 81 will be pushed upward. Then the rotating ring 81 will move up to the connecting cavity 2 813. Because the gap between the outer wall of the rotating ring 81 and the connecting cavity 2 813 is larger, the pressure in the connecting pipe 7 will decrease rapidly. When the gas pressure in the connecting pipe 7 is too low, the rotating ring 81 will automatically fall due to its own weight. Then the rotating ring 81 will drive the lever 97 to move down. The bottom end of the lever 97 will abut against the upper end of the arc ring 93, so that the gap between the arc ring 93 and the connecting pipe 7 will decrease rapidly, which can make the gas pressure in the connecting pipe 7 increase rapidly. It can automatically adjust the gas pressure and prevent the gas pressure change from affecting the subsequent work.

[0049] When gas flows from the lower side to the upper side of the inner cavity of the connecting pipe 7, the gas will drive the guide fan 83 and the rotating ring 81 to rotate together. The rotating ring 81 is suspended in the inner cavity of the connecting pipe 7, so the rotating airbags 84 on the inner and outer walls of the rotating ring 81 will scrape the outer wall of the fixed guide column 82 and the inner wall of the connecting pipe 7 for self-cleaning, preventing excessive oil stains from accumulating on the inner wall of the connecting pipe 7 and affecting the flow of gas. When the gas pressure in the connecting pipe 7 changes, the rotating ring 81 also moves up and down accordingly, so that the rotating ring 81 can automatically rotate up and down and move back and forth, which can further increase the self-cleaning area, so that the smaller area of ​​the inner diameter of the connecting pipe 7 can be cleaned in time, reducing the frequency of cleaning by workers and equipment downtime, and improving the overall work efficiency.

[0050] After the device has been shut down for a period of time, the oil stains on the fixed guide column 82 and the connecting pipe 7 may harden, increasing the difficulty of cleaning. In this case, air is first introduced from the bottom to the top of the connecting pipe 7. If the rotating ring 81 can move upwards without obstruction, the air pressure will drop significantly, so that too much dry oil residue does not accumulate in the smaller area of ​​the inner diameter of the connecting pipe 7, and the subsequent movement of the rotating ring 81 will not be affected. When the air pressure does not drop, it means that the movement of the rotating ring 81 is obstructed. At this time, gas is intermittently introduced from the bottom of the connecting pipe 7, which allows the rotating ring 81 to rotate. When the inner and outer rotating airbags 84 are obstructed, the inner and outer rotating airbags 84 will be squeezed, and the gas inside the rotating airbags 84 will be squeezed into the air guide groove 88. Afterwards, the gas flows into the area enclosed by the fixed block 89 and the connecting block 87 through the gas guide groove 88, causing the connecting block 87 to rotate toward the side away from the fixed block 89. The connecting block 87 will drive the rotating ring 85 and the rotating air bag 84 to rotate, which can reciprocate and intermittently scrape the outer wall of the self-adjusting mechanism 8 and the inner wall of the connecting pipe 7. When squeezed, the rotating air bag 84 rotates clockwise. When the gas is introduced from the bottom to the top, the rotating ring 81 rotates counterclockwise. The rotating ring 81 and the rotating air bag 84 rotate in opposite directions, thereby further enhancing the slag removal effect. The setting of the connecting cavity 2 813 and the connecting cavity 1 812 can not only self-adjust the gas pressure, but also facilitate the detection of whether the movement of the rotating ring 81 is obstructed.

[0051] When gas passes through the rotating ring 81, the rotation of the rotating ring 81 can throw a large amount of liquid oil onto the inner wall of the connecting pipe 7. After a large amount of oil accumulates, it can flow downwards along the guide groove 99. The oil will fall into the inner cavity of the collection box 91 through the guide of the arc ring 93 for collection. When it is necessary to clean the collected oil, the work is stopped for a period of time to allow the oil to fall as cleanly as possible. Then the movable plug 95 is opened, which greatly reduces the air pressure from bottom to top. At this time, the rotating ring 81 moves down, and the lever 97 falls on the arc ring 93. Due to the rounded corners 96 at the upper end of the scraper 94 and the lower end of the lever 97, the gas flows smoothly. The design of 8 allows the toggle block 97 to be positioned on one side of the scraper 94 after it moves down. When the rotating ring 81 continues to rotate, the toggle block 97 will drive the scraper 94 to rotate. The scraper 94 will then push the oil towards the discharge port where the movable plug 95 is located. The rotation of the scraper 94 can also scrape away the oil residue on the inner wall of the collection box 91, allowing the staff to quickly clean the oil without disassembling it. The introduced air can also be discharged from the discharge port, and the reduced air pressure can further accelerate the discharge of oil. When the fixed guide column 82 needs to be replaced, the movable tube 6 can be disassembled, which is quick and convenient.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas exhaust device for a biomass gasification furnace, comprising a filter barrel (1) and a gasification furnace body (2), wherein a connecting plate (3) is fixedly connected to one side wall of the filter barrel (1) near the gasification furnace body (2), a first pipe (4) is connected to the filter barrel (1), a second pipe (5) is connected to the gasification furnace body (2), a connecting pipe (7) is fixedly connected inside the connecting plate (3), a movable pipe (6) is installed and connected between the upper end of the connecting pipe (7) and the first pipe (4), and the lower end of the connecting pipe (7) is connected to the second pipe (5), characterized in that, Also includes: The self-regulating mechanism (8) is capable of automatically adjusting air pressure and self-cleaning. The self-regulating mechanism (8) is located inside the connecting pipe (7). And a sludge collection mechanism (9) that can automatically collect and discharge oil sludge, wherein the sludge collection mechanism (9) is located inside the connecting pipe (7).

2. The gas exhaust device for a biomass gasification furnace according to claim 1, characterized in that: The self-adjusting mechanism (8) includes a rotating ring (81), which is movably disposed in the inner cavity of the connecting pipe (7). A fixed guide post (82) is fixedly connected to the inner wall of the movable pipe (6). The fixed guide post (82) is located at the center of the rotating ring (81). The rotating ring (81) can rotate and move up and down. A guide fan (83) is provided inside the rotating ring (81). Rotating airbags (84) are provided on both the inner and outer sides of the rotating ring (81). The rotating airbags (84) are movably disposed inside the rotating ring (81). A rotating ring (85) is fixedly connected to the upper end of the rotating airbag (84). The rotating ring (85) is rotatably disposed inside the rotating ring (81). A torsion spring (86) is fixedly connected between the side wall of the rotating ring (85) and the rotating ring (81). A connecting block (87) is fixedly connected to the upper end of the rotating ring (85). A fixed spring (86) is provided on one side of the connecting block (87). Block (89), the upper end of the fixed block (89) is fixedly connected to the rotating ring (81), the lower end of the fixed block (89) abuts against the upper end of the rotating ring (85), the connecting block (87), the rotating ring (85) and the rotating airbag (84) are connected by an air guide groove (88), the rotating airbag (84) is provided with an air storage bag (810) on the upper side, one side wall of the air storage bag (810) is fixedly connected to the rotating ring (81), the connecting block (87) An air cavity (811) is surrounded at the opposite end of the fixed block (89). The air cavity (811) is connected to the air storage bag (810). The outer space of the air storage bag (810) is connected to the outer side of the rotating ring (81). A first connecting cavity (812) is provided at the lower part of the inner wall of the connecting pipe (7). A second connecting cavity (813) is provided at the upper part of the inner wall of the connecting pipe (7). The inner diameter of the first connecting cavity (812) is smaller than the inner diameter of the second connecting cavity (813).

3. The gas exhaust device for a biomass gasification furnace according to claim 2, characterized in that: The sludge collection mechanism (9) includes a collection box (91), which is fixedly connected to the connecting plate (3). The collection box (91) is located below the connecting pipe (7). An inclined conical surface (92) is provided at the lower end of the inner wall of the collection box (91). An arc ring (93) is provided on the upper side of one end of the collection box (91) located inside the connecting plate (3). A scraper (94) is rotatably provided inside the collection box (91). The collection box (91) is located on the connecting plate (7). 3) A discharge port is provided on the lower wall of one end of the outer side, and a movable plug (95) is installed in the discharge port. A fixed rod (96) is fixedly connected to the inner wall of the collection box (91). A paddle block (97) is fixedly connected to the bottom of the rotating ring (81) on the upper side of the scraper (94). A rounded corner (98) is provided at the bottom of the paddle block (97) and the upper end of the scraper (94). A guide groove (99) is provided on the inner wall of the connecting pipe (7). The guide groove (99) is located directly above the arc ring (93).

4. The gas exhaust device for a biomass gasification furnace according to claim 1, characterized in that: The movable tube (6) can be detached from the pipe (4) and the connecting pipe (7).

5. A gas exhaust device for a biomass gasification furnace according to claim 2, characterized in that: The rising airflow can drive the rotating ring (81) to rotate when it passes through the guide fan (83).

6. A gas exhaust device for a biomass gasification furnace according to claim 2, characterized in that: The rotating airbag (84) is made of wear-resistant material.

7. A gas exhaust device for a biomass gasification furnace according to claim 3, characterized in that: The pusher blocks (97) are arranged in a ring with equal spacing.

8. A gas exhaust device for a biomass gasification furnace according to claim 3, characterized in that: The bottom end of the fixed guide post (82) is inserted into the fixed rod (96).

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