Biomass environment-friendly gasification furnace

Abstract

The invention belongs to the technical field of gasification furnaces, and particularly relates to a biomass environment-friendly gasification furnace which comprises a furnace body, a spiral water distribution pipe is arranged in the furnace body, the upper end of the water distribution pipe is a water inlet, the lower end of the water distribution pipe is a water outlet, the water inlet and the water outlet both extend out of the outer wall of the furnace body, and an exhaust pipeline is arranged on one side of the furnace body. A first exhaust pipe is arranged on the other side of the furnace body and used for exhausting gas in the furnace body, a water filtering box is further arranged on the adjacent side of the furnace body, a spiral pipeline is further arranged in the water filtering box, one end of the spiral pipeline is fixedly connected with the water outlet, and the other end of the spiral pipeline extends out of the water filtering box to form a water drainage opening; and the lower port of the feeding port is narrow and is expanded outwards to form a cylinder diameter consistent with that of the feeding port. The probability that the bottom of the furnace body is blocked can be reduced, and ash can be further discharged, so that the combustion environment in the furnace body is improved, and the effect of recycling waste heat resources is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of gasifiers, and in particular relates to a biomass environmentally friendly gasifier. Background Art

[0002] Biomass gasifier is a device that converts biomass raw materials into combustible gas, which has two advantages: environmental protection and economy. When working, the biomass gasifier burns biomass materials at high temperature and certain pressure. The heat energy and gas generated can be used in catering, stoves, boilers and various heating furnaces, replacing traditional fuel oil or coal, thus helping users save energy costs. In addition, this technology can also reduce dependence on fossil fuels, which is conducive to environmental protection and sustainable development.

[0003] Problems with existing technologies: As a green new energy source, the raw materials used by biomass gasifiers are renewable biomass resources, such as crop straw, forest waste, edible fungus residue, etc. These raw materials are inexhaustible. Therefore, biomass gasifiers can not only provide clean energy, but also effectively utilize agricultural and forestry waste to reduce environmental pollution. In general, biomass gasifiers are an efficient and environmentally friendly energy conversion equipment, which can not only help users save energy costs, but also promote the resource utilization of agricultural waste, which is of great significance for promoting the development of green energy. However, how to improve its combustion efficiency and reduce bottom blockage while ensuring the ventilation structure is a problem that needs to be solved urgently in the current biomass gasifier. In this regard, this application proposes a biomass gasifier that can ensure the entry of air volume, reduce bottom blockage, and improve the combustion environment inside the equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a biomass environmentally friendly gasification furnace, which can reduce the probability of blockage at the bottom of the furnace body and further help the discharge of ash, thereby improving the combustion environment inside the furnace body and achieving the effect of recycling waste heat resources.

[0005] The technical solution adopted by the present invention is as follows: A biomass environmentally friendly gasification furnace comprises a furnace body, wherein a spiral water distribution pipe is arranged in the furnace body, wherein the upper end of the water distribution pipe is a water inlet, and the lower end of the water distribution pipe is a water outlet, and the water inlet and the water outlet both extend out of the outer wall of the furnace body; An exhaust duct is provided on one side of the furnace body for exhausting air into the furnace body, and a first exhaust pipe is provided on the other side of the furnace body for exhausting gas inside the furnace body. A water filter box is also provided on one side adjacent to the furnace body, and a spiral pipe is also provided inside the water filter box, one end of the spiral pipe is connected and fixed to the water outlet, and the other end extends out of the water filter box to form a drain outlet; The top opening of the furnace body is a feed port, the lower port of the feed port is narrow and expands outward to form a cylinder diameter consistent with the feed port, which is a combustion layer, and the bottom port of the combustion layer is provided with a junction ash layer, the cylinder diameter of the junction ash layer is smaller than the cylinder diameter of the combustion layer, the discharge layer is located at the bottom of the furnace body, and is connected to the lower port of the junction ash layer, and a discharge device is provided at the bottom port of the discharge layer; The end of one end of the exhaust duct is inserted into the interior of the furnace body and is directly opposite to the position of the boundary ash layer. The air volume is discharged into the boundary ash layer through the exhaust duct, and blows air to the upper and lower tube openings of the boundary ash layer.

[0006] A heat collector is arranged inside the furnace body around the feeding port, the combustion layer, the boundary ash layer and the outer ring of the discharge layer. The interior of the heat collector is hollow, and the water distribution pipe is located inside the heat collector. There is a distance between the inner wall of the furnace body and the outer wall of the heat collector to form a first air chamber.

[0007] A hollow ash chamber is provided at the bottom of the furnace body, a grate plate is provided at the position corresponding to the discharge port below the discharge layer, ash leakage holes are evenly spaced on the grate plate, and the middle part of the grate plate protrudes downward to form a cylindrical shape, which is set as a motor room; The discharging device is mounted on the grate plate.

[0008] The discharge device comprises a top discharge plate, a middle discharge plate and a bottom discharge plate, the diameters of the top discharge plate, the middle discharge plate and the bottom discharge plate gradually increase from top to bottom, the top surface of the top discharge plate is arched, and the bottom thereof is folded and covered on the middle discharge plate; The middle discharge plate includes an upper plate, which is a plane located inside the top discharge plate. The outer ring edge of the upper plate extends vertically downward and tilts outward to form an outer ring plate. The bottom of the outer ring plate extends vertically downward to form a vertical plate. The top of the bottom discharge plate is located at the bottom of the middle discharge plate and contacts with the inner ring surface of the vertical plate. The middle discharge plate and the bottom discharge plate have the same structure.

[0009] An upper shifting ratchet is arranged on the top of the top discharge plate, and a first shifting ratchet and a second shifting ratchet are arranged in sequence on the top of the upper shifting ratchet away from the center of the top discharge plate, and the tops of the first shifting ratchet and the second shifting ratchet are tilted in a direction consistent with the top arch surface of the top discharge plate.

[0010] The outer annular surfaces of the middle discharge plate and the bottom discharge plate are provided with lower push ratchets, and the top surface of the lower push ratchets is provided with a first convex ratchet, a second convex ratchet and a third convex ratchet in sequence away from the center of the discharge plate, and the protrusions of the first convex ratchets, the second convex ratchets and the third convex ratchets are all inclined outwards.

[0011] The upper pushing ratchet, the middle discharge plate and the lower pushing ratchet on the bottom discharge plate are all arranged in equidistant spirals on the three discharge plates, and the upper pushing ratchet and the lower pushing ratchet are arranged in a staggered manner.

[0012] A fixed shaft is arranged in the middle of the inner bottom of the top discharge plate, and the top of the fixed shaft passes through the top surfaces of the middle discharge plate and the bottom discharge plate in sequence. A driving motor is arranged inside the motor chamber, and the bottom of the fixed shaft is connected to the driving shaft of the driving motor.

[0013] The interior of the water filter box is hollow to form a second air chamber. A water tank is also provided inside the water filter box. One end of the first exhaust pipe extends to the inside of the water tank. The spiral pipe is arranged inside the water tank. A second exhaust pipe is also provided on the inner wall of the water filter box and above the water tank. A sewage pipe outlet is also provided on the outside of the water filter box where it is connected to the water tank.

[0014] The technical effects achieved by the present invention are: In the present invention, the other end of the exhaust duct is connected to the air pump. When the air pump is running to discharge air, the airflow enters the position of the junction ash layer through the exhaust duct. The airflow and the fuel inside the furnace body disrupt the moving direction of the gas, and moves to the low-pressure positions on the upper and lower sides of the furnace body. When the airflow moves upward, the oxygen in the gas is oxidized by the burning biomass fuel, which has a combustion-supporting effect. When the airflow moves downward, it does not have a combustion effect because the bottom is the ash product of the combustion of the biomass fuel. The dual effects of air pressure and the discharge device help discharge the ash product of the combustion of the biomass fuel, thereby reducing the probability of blockage at the bottom of the furnace body.

[0015] The present invention drives the fixed shaft to rotate by driving the motor, so that the top discharge plate, the middle discharge plate and the bottom discharge plate rotate together. When the three discharge plates rotate, the boundary ash layer and the combustion ash inside the discharge layer will be broken and tend to form powder. In addition, the vibration caused by the rotation of the top discharge plate, the middle discharge plate and the bottom discharge plate will discharge the ash from the ash leakage holes, thereby improving the blockage of the bottom of the furnace body. The wind pressure transmitted by the exhaust duct on the bottom of the furnace can further help the ash to be discharged, thereby improving the combustion environment inside the furnace body.

[0016] In the present invention, when biomass fuel is burned inside the gasifier, the high-temperature gas inside the furnace body is discharged into the water tank inside the water filter box through the first exhaust pipe. The water flow inside the water tank is gradually heated up by the high-temperature gas, heating the spiral pipe in the water tank, and the gas achieves a simple clean effect after preliminary filtration through the water body. The filtered gas can be guided to the equipment that needs to be heated by connecting the second exhaust pipe. At the same time, the water in the water distribution pipe is guided to the spiral pipe through the pipe for secondary heating. On top of that, the high-temperature gas of the furnace body and the water in the water distribution pipe are guided to the water filter box in a cross manner, thereby achieving the effect of filtering the gas and secondary heating the water flow, thereby achieving the effect of recycling waste heat resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the furnace body in the present invention; Figure 3 It is a structural schematic diagram of the wind direction inside the furnace body in the present invention; Figure 4 It is a schematic diagram of the structure of a half-section of a furnace body in the present invention; Figure 5 The present invention Figure 4 A detailed enlarged structural diagram; Figure 6 It is a schematic diagram of the structure of the discharging device in the present invention; Figure 7 It is a schematic diagram of the structure of the separation of the discharge device in the present invention; Figure 8 It is a half-section structural schematic diagram of the discharge device in the present invention; Fig. 9 It is a structural schematic diagram of the water filter box in the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Furnace body; 101. Feeding port; 102. Combustion layer; 103. Boundary ash layer; 104. Discharge layer; 105. Heat collector; 106. First air chamber; 107. Ash chamber; 108. Grate plate; 109. Ash leakage hole; 110. Motor room; 2. Water distribution pipe; 3. Water inlet; 4. Water outlet; 5. Exhaust duct; 6. First exhaust pipe; 7. Water filter box; 701. Water tank; 702. Second air chamber; 703. Second exhaust pipe; 704. Drain pipe outlet; 8. Spiral pipe; 9. Drainage outlet; 10. Discharge device; 11. Top discharge plate; 1101. Upper push rod; 1102. First lift rod; 1103. Second lift rod; 1104. Fixed shaft; 12. Middle discharge plate; 1201. Upper plate; 1202. Outer ring plate; 1203. Vertical plate; 1204. Lower pusher; 1205. First convex ridge; 1206. Second convex ridge; 1207. Third convex ridge; 13. Bottom discharge plate; 14. Driving motor. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0020] like Figure 1-2 As shown, a biomass environmentally friendly gasification furnace comprises a furnace body 1, a spiral water distribution pipe 2 is arranged in the furnace body 1, the upper end of the water distribution pipe 2 is a water inlet 3, and the lower end is a water outlet 4, the water inlet 3 and the water outlet 4 both extend out of the outer wall of the furnace body 1, the water inlet 3 is connected to an external water supply device to supply water to the water distribution pipe 2, so that the water flow inside the water distribution pipe 2 is heated inside the furnace body 1 according to the spiral pipe diameter; An exhaust duct 5 is provided on one side of the furnace body 1 for discharging air into the furnace body 1. A first exhaust pipe 6 is provided on the other side of the furnace body 1 for discharging gas inside the furnace body 1. A water filter box 7 is also provided on the adjacent side of the furnace body 1. A spiral pipe 8 is also provided inside the water filter box 7. One end of the spiral pipe 8 is connected and fixed to the water outlet 4, and the other end extends to the outside of the water filter box 7 to form a drain outlet 9.

[0021] Refer to the attached Figure 3-4 The top opening of the furnace body 1 is a feed port 101. The lower end of the feed port 101 is narrow and expands outward to form a cylinder diameter consistent with the feed port 101, which is a combustion layer 102. The bottom end of the combustion layer 102 is provided with a boundary ash layer 103. The cylinder diameter of the boundary ash layer 103 is smaller than the cylinder diameter of the combustion layer 102. The discharge layer 104 is located at the bottom of the furnace body 1 and is connected to the lower end of the boundary ash layer 103. A discharge device 10 is provided at the bottom end of the discharge layer 104. One end of the exhaust duct 5 is inserted into the furnace body 1 and is directly opposite to the boundary ash layer 103 . The air volume is discharged into the boundary ash layer 103 through the exhaust duct 5 , and blows air to the upper and lower tube openings of the boundary ash layer 103 .

[0022] The feed port 101 and the combustion layer 102 are mainly raw materials to be burned, until the raw materials in the interface ash layer 103 are fully burned, and ash products of biomass fuel combustion appear and are discharged through the discharge device 10 at the bottom port of the discharge layer 104.

[0023] Furthermore, the other end of the exhaust duct 5 is connected to the air pump. When the air pump is running to discharge air, the airflow passes through the exhaust duct 5 and enters the position of the boundary ash layer 103. The airflow and the fuel inside the furnace body 1 disrupt the direction of the gas flow and move to the low-pressure positions on the upper and lower sides of the furnace body. When the airflow moves upward, the oxygen in the gas is oxidized by the burning biomass fuel, which has a combustion-supporting effect. When the airflow moves downward, since the bottom is the ash product of the combustion of the biomass fuel, it does not have a combustion effect. The dual effects of air pressure and the discharge device 10 help discharge the ash product of the combustion of the biomass fuel, thereby reducing the probability of blockage at the bottom of the furnace body 1.

[0024] Refer to the attached Figure 3-4 A collector 105 is provided inside the furnace body 1 in the outer ring around the feed port 101, the combustion layer 102, the boundary ash layer 103 and the discharge layer 104. The interior of the collector 105 is hollow, and the water distribution pipe 2 is located inside the collector 105. There is a distance between the inner wall of the furnace body 1 and the outer wall of the collector 105, forming a first air chamber 106.

[0025] The collector 105 is close to the combustion layer 102, the boundary ash layer 103 and the discharge layer 104 inside the furnace body 1. When the biomass fuel burns inside the furnace body 1, the collector 105, as a heat transfer medium, can quickly heat up and conduct heat to the water distribution pipe 2, so that the water flow inside the water distribution pipe 2 is heated. On the other hand, the heat from the combustion in the furnace body 1 makes the first air chamber 106 in a high temperature state, which can improve the heat transfer efficiency and quickly heat up the collector 105 and the water distribution pipe 2.

[0026] Refer to the attached Figure 5 A hollow ash chamber 107 is provided at the bottom of the furnace body 1, and a grate plate 108 is provided at the position corresponding to the discharge port below the discharge layer 104. Ash leakage holes 109 are evenly spaced on the grate plate 108. The middle part of the grate plate 108 protrudes downward and extends to form a cylindrical shape, which is set as a motor room 110, and the discharge device 10 is mounted on the grate plate 108.

[0027] Furthermore, when the discharge device 10 is started, the biomass fuel ash inside the discharge layer 104 is pushed out from the ash discharge hole 109 .

[0028] Refer to the attached Figure 6-7The discharge device 10 includes a top discharge plate 11, a middle discharge plate 12 and a bottom discharge plate 13. The diameters of the top discharge plate 11, the middle discharge plate 12 and the bottom discharge plate 13 gradually increase from top to bottom. The top surface of the top discharge plate 11 is arched, and its bottom is retracted and covered on the middle discharge plate 12. The middle discharge plate 12 includes an upper plate 1201. The upper plate 1201 is a plane located inside the top discharge plate 11. The outer ring edge of the upper plate 1201 extends vertically downward and tilts outward to form an outer ring plate 1202. The bottom of the outer ring plate 1202 extends vertically downward to form a vertical plate 1203. The top of the bottom discharge plate 13 is located at the inner bottom of the middle discharge plate 12 and contacts with the inner ring surface of the vertical plate 1203. The structures of the middle discharge plate 12 and the bottom discharge plate 13 are consistent.

[0029] Furthermore, the top discharge plate 11, the middle discharge plate 12 and the bottom discharge plate 13 are transitionally matched.

[0030] Refer to the attached Figure 6-7 An upper shifting ratchet 1101 is provided on the top of the top discharge plate 11, and a first shifting ratchet 1102 and a second shifting ratchet 1103 are provided in sequence on the top of the upper shifting ratchet 1101 away from the center of the top discharge plate 11, and the top tilting direction of the first shifting ratchet 1102 and the second shifting ratchet 1103 is consistent with the top arch surface of the top discharge plate 11, and a lower shifting ratchet 1204 is provided on the outer annular surface of the middle discharge plate 12 and the bottom discharge plate 13, and a first convex ratchet 1205, a second convex ratchet 1206 and a third convex ratchet 1207 are provided on the top surface away from the center of the discharge plate, and the protrusion directions of the first convex ratchet 1205, the second convex ratchet 1206 and the third convex ratchet 1207 are all inclined outward.

[0031] Furthermore, the protrusions on the upper ratchet 1101 and the lower ratchet 1204 enable them to contact the ash after the combustion of the biomass fuel to the greatest extent when rotating, and can effectively break up the ash so that it can be discharged more easily from the ash leakage hole 109. Furthermore, the upper ratchet 1101 , the middle discharge plate 12 and the lower ratchet 1204 on the bottom discharge plate 13 are all equidistantly arranged in spirals on the three discharge plates, and the upper ratchet 1101 and the lower ratchet 1204 are staggered.

[0032] Refer to the attached Figure 8 A fixed shaft 1104 is provided in the middle part of the inner bottom of the top discharge plate 11, and the top of the fixed shaft 1104 passes through the top surfaces of the middle discharge plate 12 and the bottom discharge plate 13 in sequence. A driving motor 14 is provided inside the motor chamber 110, and the bottom of the fixed shaft 1104 is connected to the driving shaft of the driving motor 14.

[0033] Furthermore, by driving the motor 14, the fixed shaft 1104 is driven to rotate, so that the top discharge plate 11, the middle discharge plate 12 and the bottom discharge plate 13 rotate together. When the three discharge plates rotate, the boundary ash layer 103 and the combustion ash inside the discharge layer 104 will be broken and tend to form powder. In addition, the vibration caused by the rotation of the top discharge plate 11, the middle discharge plate 12 and the bottom discharge plate 13 will discharge the ash from the ash leakage hole 109, thereby improving the blockage of the bottom of the furnace body 1. The wind pressure transmitted from the exhaust duct 5 at the bottom of the furnace can further help the ash to be discharged, thereby improving the combustion environment inside the furnace body 1.

[0034] Refer to the attached Fig. 9 The interior of the water filter box 7 is hollow to form a second air chamber 702. A water tank 701 is also provided inside the water filter box 7. One end of the first exhaust pipe 6 extends to the inside of the water tank 701. The spiral pipe 8 is arranged inside the water tank 701. A second exhaust pipe 703 is also provided on the inner wall of the water filter box 7 and higher than the water tank 701. A sewage pipe outlet 704 is also provided on the outside of the water filter box 7 where it is connected to the water tank 701.

[0035] Furthermore, when biomass fuel is burned inside the gasifier, the high-temperature gas inside the furnace body 1 is discharged into the water tank 701 inside the water filter box 7 through the first exhaust pipe 6. The water flow inside the water tank 701 is gradually heated up by the high-temperature gas, heating the spiral pipe 8 in the water tank 701. The gas achieves a simple clean effect after preliminary filtration by the water body. The filtered gas can be guided to the equipment that needs to be heated by connecting the second exhaust pipe 703. At the same time, the water supply equipment pumps the water flow into the water distribution pipe 2. The high temperature environment in the furnace and the fast heat conduction rate of the collector 105 heat the water flow in the water distribution pipe 2. The water in the water distribution pipe 2 is guided to the spiral pipe 8 through the pipe for secondary heating. Thereon, the high-temperature gas of the furnace body 1 and the water in the water distribution pipe 2 are guided to the water filter box 7 in a cross manner, which not only achieves the effect of filtering the gas, but also can heat the water flow for secondary use, thereby achieving the effect of recycling waste heat resources.

[0036] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A biomass environmentally friendly gasifier, characterized in that: It comprises a furnace body (1), wherein a spiral water distribution pipe (2) is arranged in the furnace body (1), the upper end of the water distribution pipe (2) is a water inlet (3), and the lower end is a water outlet (4), and the water inlet (3) and the water outlet (4) both extend out of the outer wall of the furnace body (1); An exhaust duct (5) is provided on one side of the furnace body (1) for exhausting air into the furnace body (1); a first exhaust pipe (6) is provided on the other side of the furnace body (1) for exhausting gas from the furnace body (1); a water filter box (7) is provided on an adjacent side of the furnace body (1); a spiral duct (8) is provided inside the water filter box (7); one end of the spiral duct (8) is connected and fixed to the water outlet (4); the other end extends out of the water filter box (7) to form a water outlet (9); The top opening of the furnace body (1) is a feed port (101); the lower end of the feed port (101) is narrow and expands outward to form a cylinder diameter consistent with the feed port (101), which is a combustion layer (102); the bottom end of the combustion layer (102) is provided with a boundary ash layer (103); the cylinder diameter of the boundary ash layer (103) is smaller than the cylinder diameter of the combustion layer (102); the discharge layer (104) is located at the bottom of the furnace body (1) and is connected to the lower end of the boundary ash layer (103); and a discharge device (10) is provided at the bottom end of the discharge layer (104); The end of one end of the exhaust duct (5) is inserted into the interior of the furnace body (1) and is directly opposite to the position of the boundary ash layer (103); the air volume is discharged into the boundary ash layer (103) through the exhaust duct (5) and blows air to the upper and lower tube openings of the boundary ash layer (103).

2. The biomass environmentally friendly gasifier according to claim 1, characterized in that: A heat collector (105) is provided in the outer ring portion of the furnace body (1) surrounding the feed port (101), the combustion layer (102), the boundary ash layer (103) and the discharge layer (104); the interior of the heat collector (105) is hollow, and the water distribution pipe (2) is located inside the heat collector (105); There is a distance between the inner wall of the furnace body (1) and the outer wall of the heat collector (105), forming a first air chamber (106).

3. The biomass environmentally friendly gasifier according to claim 1, characterized in that: A hollow ash chamber (107) is provided at the bottom of the furnace body (1), a grate plate (108) is provided at a position corresponding to a discharge port below the discharge layer (104), ash leakage holes (109) are provided on the grate plate (108) at equal intervals, and a middle portion of the grate plate (108) protrudes downward and extends to form a cylindrical shape, which is set as a motor chamber (110); The discharge device (10) is mounted on the grate plate (108).

4. The biomass environmentally friendly gasifier according to claim 3, characterized in that: The discharge device (10) comprises a top discharge plate (11), a middle discharge plate (12) and a bottom discharge plate (13), wherein the diameters of the top discharge plate (11), the middle discharge plate (12) and the bottom discharge plate (13) gradually increase from top to bottom, and the top surface of the top discharge plate (11) is arched, and its bottom is folded and covers the middle discharge plate (12); The middle discharge plate (12) comprises an upper plate (1201), wherein the upper plate (1201) is a plane located inside the top discharge plate (11), the outer ring edge of the upper plate (1201) extends vertically downward and tilts outward to form an outer ring plate (1202), the bottom of the outer ring plate (1202) extends vertically downward to form a vertical plate (1203), the top of the bottom discharge plate (13) is located inside the bottom of the middle discharge plate (12) and contacts the inner ring surface of the vertical plate (1203), and the middle discharge plate (12) and the bottom discharge plate (13) have the same structure.

5. The biomass environmentally friendly gasifier according to claim 4, characterized in that: The top of the top discharge plate (11) is provided with an upper push rod (1101), and the top of the upper push rod (1101) is provided with a first push rod (1102) and a second push rod (1103) in sequence away from the center of the top discharge plate (11), and the tops of the first push rod (1102) and the second push rod (1103) are tilted in the same direction as the top arch surface of the top discharge plate (11).

6. The biomass environmentally friendly gasifier according to claim 5, characterized in that: The outer annular surfaces of the middle discharge plate (12) and the bottom discharge plate (13) are provided with lower pusher ratchets (1204), and the top surface of the lower pusher ratchets (1204) is provided with a first convex ratchet (1205), a second convex ratchet (1206) and a third convex ratchet (1207) in sequence away from the center of the discharge plate, and the protrusions of the first convex ratchets (1205), the second convex ratchets (1206) and the third convex ratchets (1207) are all arranged to be inclined outwards.

7. The biomass environmentally friendly gasifier according to claim 6, characterized in that: The upper pushing ratchet (1101), the middle discharge plate (12) and the lower pushing ratchet (1204) on the bottom discharge plate (13) are all arranged in an equidistant spiral on the three discharge plates, and the upper pushing ratchet (1101) and the lower pushing ratchet (1204) are arranged in a staggered manner.

8. The biomass environmentally friendly gasifier according to claim 7, characterized in that: A fixed shaft (1104) is provided in the middle of the inner bottom of the top discharge plate (11), and the top of the fixed shaft (1104) passes through the top surfaces of the middle discharge plate (12) and the bottom discharge plate (13) in sequence. A drive motor (14) is provided inside the motor chamber (110), and the bottom of the fixed shaft (1104) is connected to the drive shaft of the drive motor (14).

9. The biomass environmentally friendly gasifier according to claim 1, characterized in that: The interior of the water filter box (7) is hollow, forming a second air chamber (702); a water tank (701) is also provided inside the water filter box (7); one end of the first exhaust pipe (6) extends into the interior of the water tank (701); the spiral pipe (8) is arranged inside the water tank (701); a second exhaust pipe (703) is also provided at a position located on the inner wall of the water filter box (7) and higher than the water tank (701); and a sewage pipe outlet (704) is also provided at a position outside the water filter box (7) connected to the water tank (701).

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