Pretreatment device for pyrolysis and gasification of garbage biomass

Abstract

The utility model discloses a pretreatment device for pyrolysis and gasification of garbage biomass, which comprises a case, an opening is arranged at the upper end of the case, a feed hopper is fixedly connected to the opening, a feeding mechanism is arranged in the feed hopper, the feeding mechanism presses loose garbage into continuous blocks in a reciprocating compression mode, sewage in the garbage is discharged, and the waste is recycled. A discharging port is formed in the lower end of the feeding hopper, a crushing mechanism is installed at the discharging port and continuously shreds blocky garbage pressed by the feeding mechanism through crushing teeth arranged in a spiral path, a water collecting cover is installed on the side wall of the feeding hopper, a drainage pipe is fixedly connected to the bottom of the water collecting cover, and one end of the drainage pipe extends out of the machine box; and the chain plate type conveyor is arranged in the case. According to the biomass pyrolysis and gasification device, biomass pyrolysis and gasification garbage can be fully crushed, the specific surface area of the garbage is increased, moisture in the garbage can be discharged during crushing, and energy consumption in the subsequent pyrolysis and gasification process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment technology, and in particular to a pretreatment device for waste biomass pyrolysis and gasification. Background Technology

[0002] Waste-to-biomass pyrolysis gasification first sorts municipal waste to remove non-combustible impurities such as stones and metals that are detrimental to subsequent processing. Then, it undergoes crushing and drying to ensure that the particle size and moisture content of the waste meet the requirements for pyrolysis gasification incineration, guaranteeing the smooth progress of subsequent processing. The pre-treated waste is then fed into a pyrolysis gasification furnace, where it undergoes pyrolysis gasification according to pre-set parameters such as temperature and material residence time, generating syngas (mainly containing combustible gases such as carbon monoxide and hydrogen) and byproducts such as coke and tar. Different pyrolysis gasification furnaces vary in structure and heating methods, such as fixed-bed pyrolysis gasification furnaces and fluidized-bed pyrolysis gasification furnaces, to separate the syngas, coke, and tar produced by pyrolysis gasification. Syngas can be further purified and used as an energy source; tar needs to be processed and can be converted into small-molecule combustible gas through cracking and other methods to improve energy utilization; coke can be used as fuel or disposed of in landfill or other ways depending on its quality; some incompletely converted materials are burned in an incinerator, and the high-temperature flue gas generated is used to heat water to produce steam through a waste heat recovery system. The steam drives a steam turbine to generate electricity or is used for external heating, realizing energy recovery and utilization. At the same time, the exhaust gas after combustion is strictly purified to ensure that it meets emission standards.

[0003] Currently, before waste treatment, technologies such as hot air heating are needed to reduce the moisture content of the waste. However, due to the large particle size of the waste, the entrained sewage is difficult to evaporate, resulting in the drying process requiring a lot of heat. Moreover, because the waste is too loose and has a large volume, traditional waste crushing methods cannot fully crush the waste to the appropriate particle size, resulting in insufficient pyrolysis and gasification reactions. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the existing technology where the waste particles are too large, the entrained sewage is difficult to evaporate, resulting in a large amount of heat consumption during the drying process, and the traditional waste crushing method cannot fully crush the waste to the appropriate particle size due to the excessively loose and large volume of the waste, resulting in insufficient pyrolysis and gasification reaction. Therefore, this invention proposes a pretreatment device for waste biomass pyrolysis and gasification.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pretreatment device for waste biomass pyrolysis gasification includes:

[0007] The chassis has an opening at its upper end, and a feeding hopper is fixedly connected to the opening. A feeding mechanism is installed inside the feeding hopper. The feeding mechanism uses a reciprocating compression method to compress loose garbage into continuous blocks and discharge wastewater from the garbage.

[0008] The crushing mechanism has a discharge port at the lower end of the feed hopper, and the crushing mechanism is installed at the discharge port. The crushing mechanism continuously shreds the blocky waste pressed by the feed mechanism through crushing teeth arranged in a spiral path.

[0009] A water collection hood is installed on the side wall of the feed hopper and a drain pipe is fixedly connected to the bottom. One end of the drain pipe extends to the outside of the machine casing.

[0010] A chain plate conveyor, wherein the chain plate conveyor is installed inside a casing, and a rectangular discharge port is provided on one side of the casing;

[0011] An air supply duct is installed on the frame of the chain conveyor and is used to air dry the garbage fragments above the chain conveyor.

[0012] Preferably, the feeding mechanism includes a crossbar and a pressure block. The crossbar is fixed inside the feeding hopper and has two sliding sleeves. A guide post is sleeved inside each of the two sliding sleeves. The lower end of the guide post is fixedly connected to the upper end of the pressure block. A hydraulic cylinder is fixedly connected to the center of the crossbar. The piston rod end of the hydraulic cylinder passes through the wall of the crossbar and is fixedly connected to the center of the upper end of the pressure block. The lower end of the feeding hopper is provided with a compression section that cooperates with the structure of the pressure block.

[0013] Preferably, the inner side of the compression section is fixedly connected with a plurality of evenly distributed baffles, the side wall of the pressure block is provided with a plurality of grooves that cooperate with the baffles, the compression section is provided with a plurality of evenly distributed water seepage holes, the water seepage holes are located between two adjacent baffles, and the lower end of the pressure block is fixedly connected with a plurality of material feeding teeth.

[0014] Preferably, the crushing mechanism includes a crushing roller, the crushing teeth are fixedly connected to the side wall of the crushing roller along a spiral path, a central shaft is fixedly connected to the center of the crushing roller, the shaft wall of the central shaft is rotatably connected to the discharge port through two ball bearings, a reduction motor is fixedly connected to one side of the machine housing, the output end of the reduction motor extends into the machine housing and is fixedly connected coaxially with the central shaft, and two inclined plates are fixedly connected inside the machine housing, the lower ends of the two inclined plates extend to the top of the chain conveyor.

[0015] Preferably, a drive shaft is rotatably connected to the lower outlet of the feed hopper via a rolling bearing. A cleaning roller is fixedly connected to the shaft wall of the drive shaft. A first bevel gear is fixedly connected to one end of the cleaning roller. A second bevel gear is fixedly connected to the shaft wall of the central shaft. The side wall of the feed hopper is rotatably connected to the drive shaft via a bearing seat. A third bevel gear is fixedly connected to both ends of the drive shaft. The first bevel gear meshes with one of the third bevel gears, and the second bevel gear meshes with the other of the third bevel gears.

[0016] Preferably, a compression pipe is fixedly connected to the lower end of the feed hopper by bolts at the discharge port. The upper end of the compression pipe is inclinedly provided with a guide section, and one side of the lower end of the compression pipe is provided with an arc-shaped limiting section, which cooperates with the crushing teeth.

[0017] Preferably, the seepage holes are arranged in multiple layers on the side wall of the feed hopper, and the lower end of the water collection hood is lower than the height of the lowest layer of seepage holes.

[0018] Preferably, the air supply duct includes a main duct, two secondary ducts, several horizontal pipes, and several bends. The two main ducts are located on both sides of the chain conveyor frame, and the several horizontal pipes are evenly distributed and fixed to the side walls of the two secondary ducts. One end of the horizontal pipe that supplies air passes through the chain conveyor frame, and the several bends are evenly distributed and fixed to the side walls of the two secondary ducts. One end of the bend that supplies air is located on one side of the middle roller of the chain conveyor.

[0019] Preferably, an air collecting hood is fixedly connected inside the casing, a duct fan is fixedly connected to the upper end of the air collecting hood, an exhaust pipe is fixedly connected to the air outlet end of the duct fan, one end of the exhaust pipe extends to the outside of the casing, and the air collecting hood is located above the discharge port on one side of the casing.

[0020] Compared with the prior art, this utility model provides a pretreatment device for waste biomass pyrolysis gasification, which has the following beneficial effects:

[0021] 1. First, the loose, large-particle waste is compressed into blocks. The compression process can effectively remove the wastewater carried in the waste, increase the calorific value of the raw materials, and reduce the energy consumption in the subsequent pyrolysis and gasification process.

[0022] 2. Secondly, the spiral-arranged crushing teeth can effectively and quickly shred the compressed waste. Compared with traditional crushers such as hammer crushers, auger crushers, and double roll crushers, this equipment can greatly reduce the particle size of waste, reduce the particle size of waste biomass, increase the specific surface area, and make the pyrolysis and gasification reaction more complete.

[0023] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model can fully crush the waste from biomass pyrolysis and gasification, increase the specific surface area of ​​the waste, and also remove moisture from the waste during crushing, thereby reducing energy consumption in the subsequent pyrolysis and gasification process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a pretreatment device for waste biomass pyrolysis and gasification proposed in this utility model;

[0025] Figure 2 This utility model proposes a pretreatment device for waste biomass pyrolysis gasification. Figure 1 A sectional view;

[0026] Figure 3 This is a schematic diagram of the structure of the casing, water collection hood, air supply duct and chain plate conveyor in a pretreatment device for waste biomass pyrolysis gasification proposed in this utility model.

[0027] Figure 4 This is a schematic diagram of the structure of a water collection hood, a feeding hopper, a compression pipe, and a crushing roller in a pretreatment device for waste biomass pyrolysis and gasification proposed in this utility model.

[0028] Figure 5 This utility model proposes a pretreatment device for waste biomass pyrolysis gasification. Figure 4 Side view;

[0029] Figure 6 This is a schematic diagram of the structure of the cleaning roller, crushing roller, first bevel gear, second bevel gear and third bevel gear in a pretreatment device for waste biomass pyrolysis gasification proposed in this utility model;

[0030] Figure 7 This is a partial structural diagram of the feed section in a pretreatment device for waste biomass pyrolysis and gasification proposed in this utility model.

[0031] Figure 8 This is a schematic diagram of the structure of the compression pipe of a pretreatment device for waste biomass pyrolysis and gasification proposed in this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of a pretreatment device briquette for waste biomass pyrolysis and gasification proposed in this utility model.

[0033] In the diagram: 1. Feed hopper; 2. Crossbar; 3. Guide column; 4. Hydraulic cylinder; 5. Press block; 6. Machine box; 7. Gear motor; 8. Air supply duct; 9. Drain pipe; 10. Duct fan; 11. Air collection hood; 12. Inclined plate; 13. Chain conveyor; 14. Crushing roller; 15. Crushing teeth; 16. Compression pipe; 17. Water collection hood; 18. Second bevel gear; 19. Third bevel gear; 20. First bevel gear; 21. Cleaning roller; 22. Baffle bar; 23. Drainage hole; 24. Limiting part; 25. Guide part; 26. Feeding teeth; 27. Groove. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] This utility model discloses a pretreatment device for waste biomass pyrolysis and gasification. This device is used to treat waste that has already had non-combustible impurities such as stones, metals, and glass removed, as well as substances that are not conducive to pyrolysis and gasification. It mainly discharges wastewater from the waste, removes moisture from the waste biomass, increases the calorific value of the raw materials, reduces energy consumption in the subsequent pyrolysis and gasification process, and crushes the waste into small particles, thereby reducing the particle size of the waste biomass, increasing the specific surface area, and making the pyrolysis and gasification reaction more complete.

[0037] Reference Figure 1-9The key technical features of this utility model are as follows: It includes a casing 6 with an opening at its upper end. A feeding hopper 1 is fixedly installed at the opening. A feeding mechanism is installed inside the feeding hopper 1. The feeding mechanism uses a reciprocating compression method to compress loose waste into continuous blocks and discharge wastewater from the waste. The feeding mechanism uses a crossbar 2 and a pressing block 5 as compression components. The crossbar 2 is fixed inside the feeding hopper 1 and has two sliding sleeves. Guide posts 3 are fitted inside each of the two sliding sleeves. The lower end of the guide posts 3 is fixedly connected to the upper end of the pressing block 5. A hydraulic cylinder 4 is fixedly connected to the center of the crossbar 2. The piston rod end of the hydraulic cylinder 4 passes through the rod wall of the crossbar 2 and is connected to the pressing block 5. The upper center is fixedly connected, and the lower end of the feed hopper 1 is provided with a compression section that cooperates with the structure of the pressing block 5. The compression section reduces the discharge port diameter of the feed hopper 1 by means of a variable diameter method, so that the garbage forms a continuous block shape. This is mainly achieved by bolting the compression pipe 16 to the discharge port at the lower end of the feed hopper 1. The upper end of the compression pipe 16 is provided with a guide section 25 at an incline. The guide section 25 has a structure that is larger at the top and smaller at the bottom. An arc-shaped limiting section 24 is provided on one side of the lower end of the compression pipe 16. The limiting section 24 cooperates with the crushing tooth 15. The limiting section 24 mainly cooperates with the crushing tooth 15 to pass under the compression pipe 16 and restricts the discharge direction of the crushed garbage.

[0038] Furthermore, to facilitate the discharge of wastewater from the waste during compression, this technical solution employs multiple evenly distributed baffles 22 fixedly connected to the inner side of the compression section, and multiple grooves 27 that mate with the baffles 22 are provided on the side wall of the compression block 5. When the compression block 5 moves down into the compression section, the baffles 22 move into the grooves 27, allowing the compression block 5 to fit against the inner side of the compression section. The compression section has multiple evenly distributed seepage holes 23 located between adjacent baffles 22. As the waste is gradually compressed by the compression block 5 from top to bottom, the wastewater in the waste can be discharged through the seepage holes 23. Multiple feeding teeth 26 are fixedly connected to the lower end of the compression block 5. When the compression block 5 moves upward, the waste can slide down to the bottom of the compression block 5. When the compression block 5 moves downward, the feeding teeth 26 can carry the waste into the compression section. Figure 9 As shown, the feeding tooth 26 has a triangular structure. When the pressing block 5 enters the compression section, the inclined surface of the feeding tooth 26 can squeeze the garbage to the middle of the compression section, making the compressed garbage block compact. A water collection cover 17 is set on the outside of the compression section. The water collection cover 17 is installed on the side wall of the feeding hopper 1 and a drain pipe 9 is fixedly connected to the bottom. One end of the drain pipe 9 extends to the outside of the machine box 6. The seepage holes 23 are arranged in multiple layers on the side wall of the feeding hopper 1. The lower end of the water collection cover 17 is lower than the height of the lowest layer of seepage holes 23, so that the sewage discharged from the compression can be discharged to the outside of the equipment in a timely manner.

[0039] A crushing mechanism is installed below the feed hopper 1. The feed hopper 1 has a discharge port at its lower end. The crushing mechanism is installed at the discharge port. The crushing mechanism continuously shreds the blocky waste pressed by the feed mechanism using crushing teeth 15 arranged along a spiral path. The crushing teeth 15 are fixedly connected to the side wall of the crushing roller 14 along the spiral path. A central shaft is fixedly connected to the center of the crushing roller 14. The shaft wall of the central shaft is rotatably connected to the discharge port via two ball bearings. A reduction motor 7 is fixedly connected to one side of the housing 6. The speed of the reduction motor 7 is 200 to 300 revolutions per minute. The output end of the reduction motor 7 extends into the housing 6 and is fixedly connected coaxially to the central shaft. Two inclined plates 12 are fixedly connected inside the housing 6. The lower ends of the two inclined plates 12 extend above the chain conveyor 13. The crushed waste, guided by the inclined plates 12, can slide onto the chain conveyor 13. The chain conveyor 13 is installed inside the housing 6. A rectangular discharge port is provided on one side of the housing 6. Figure 2 and Figure 3 As shown, one end of the chain conveyor 13 extends directly out of the discharge port;

[0040] At the lower discharge port of the feed hopper 1, a drive shaft is rotatably connected via a rolling bearing. A cleaning roller 21 is fixedly connected to the shaft wall of the drive shaft. The cleaning roller 21 uses soft materials such as nylon strips and steel wire strips as cleaning components. When the cleaning roller 21 rotates, it brushes off the debris on the crushing teeth 15, keeping the crushing teeth 15 clean and residue-free. A first bevel gear 20 is fixedly connected to one end of the cleaning roller 21, and a second bevel gear 18 is fixedly connected to the shaft wall of the central shaft. The number of teeth of the second bevel gear 18 is greater than the number of teeth of the first bevel gear 20, which serves to increase speed. The side wall of the feed hopper 1 is rotatably connected to the drive shaft via a bearing seat. A third bevel gear 19 is fixedly connected to both ends of the drive shaft. The first bevel gear 20 meshes with one of the third bevel gears 19, and the second bevel gear 18 meshes with the other third bevel gear 19. Figure 5 As shown, when the second bevel gear 18 rotates counterclockwise, under the linkage of the two third bevel gears 19, the first bevel gear 20 rotates in the opposite direction to the second bevel gear 18. In this way, the second bevel gear 18 drives the first bevel gear 20 to rotate at high speed through the third bevel gear 19, and the rotation directions are opposite. In this way, the cleaning roller 21 can be used to clean the crushing roller 14 synchronously.

[0041] The air supply duct 8 delivers heat recovered from the pyrolysis gasification furnace to the chain conveyor 13 for drying the waste. A Roots blower (not shown in the figure) is used as the power source. The air supply duct 8 is installed on the frame of the chain conveyor 13 to dry the waste fragments above the chain conveyor 13. The air supply duct 8 includes a main duct, two secondary ducts, several horizontal pipes, and several bends. The two main ducts are located on both sides of the frame of the chain conveyor 13. Several horizontal pipes are evenly distributed and fixed to the side walls of the two secondary ducts. One end of the horizontal pipes passes through the frame of the chain conveyor 13. The horizontal pipes mainly blow hot air laterally onto the surface of the waste above the chain conveyor 13. In addition, several bends are evenly distributed and fixed to the side walls of the two secondary ducts. One end of the bends is located on one side of the middle roller of the chain conveyor 13. Figure 2 and Figure 3 The curved pipe mainly directs the hot air to the bottom of the garbage, so that it can be used in conjunction with the horizontal pipe to dry the garbage in a three-dimensional manner.

[0042] The exhaust gas produced during drying not only contains water vapor but also has a strong odor. The solution is to fix an air collecting hood 11 inside the casing 6. The air collecting hood 11 is located above the discharge port on one side of the casing 6. The upper end of the air collecting hood 11 is fixedly connected to a duct fan 10. An exhaust pipe is fixedly installed at the air outlet of the duct fan 10, and one end of the exhaust pipe extends outside the casing 6. At this time, the gas inside the casing 6 can be quickly extracted and discharged by the duct fan 10. The discharged gas can be directly transported to the pyrolysis gasification furnace, where it can be used as combustion air and the odor can be treated by burning it with flames in the pyrolysis furnace.

[0043] The advantage of this technical solution is that it first compresses loose, large-particle waste into blocks, and the compression process can effectively remove the wastewater entrained in the waste, increase the calorific value of the raw materials, and reduce the energy consumption in the subsequent pyrolysis and gasification process.

[0044] Secondly, the spiral-arranged crushing teeth 15 can effectively and quickly shred the compressed waste. Compared with traditional hammer crushers, auger crushers, double roll crushers and other common crushers, this equipment can greatly reduce the particle size of waste, reduce the particle size of waste biomass, increase the specific surface area, and make the pyrolysis and gasification reaction more complete.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pretreatment device for waste biomass pyrolysis gasification, characterized by, Include: Cabinet (6), the upper end of the cabinet (6) is provided with an opening, and the opening is fixedly connected with a feeding hopper (1), the feeding hopper (1) is provided with a feeding mechanism, the feeding mechanism adopts reciprocating compression to compress loose garbage into continuous blocks, and discharge sewage in the garbage; The crushing mechanism is installed at the discharge port of the feeding hopper (1), the crushing mechanism continuously tears the block-shaped garbage compressed by the feeding mechanism through the crushing teeth (15) arranged in a spiral path; Water collecting cover (17) is installed on the side wall of the feeding hopper (1) and is fixedly connected with a drain pipe (9) at the bottom, one end of the drain pipe (9) extends to the outside of the cabinet (6); Chain plate conveyor (13) is installed in the cabinet (6), one side of the cabinet (6) is provided with a rectangular discharge port; Air supply duct (8) is installed on the frame of chain plate conveyor (13) for air drying treatment of garbage pieces above chain plate conveyor (13).

2. The pretreatment device for the pyrolysis gasification of waste biomass according to claim 1, characterized in that, The feeding mechanism includes a cross bar (2) and a block (5), the cross bar (2) is fixed in the feeding hopper (1) and is provided with two sliding sleeves, two sliding sleeves are sleeved with guide columns (3), the lower end of the guide column (3) is fixedly connected with the upper end of the block (5), the center of the cross bar (2) is fixedly connected with a hydraulic cylinder (4), the piston rod end of the hydraulic cylinder (4) penetrates through the rod wall of the cross bar (2) and is fixedly connected with the upper end center of the block (5), the lower end of the feeding hopper (1) is provided with a compression part matched with the structure of the block (5).

3. A pre-treatment device for pyrolysis gasification of waste biomass according to claim 2, characterized in that, The inside of the compression part is fixedly connected with a plurality of evenly distributed blocking strips (22), the side wall of the block (5) is provided with a plurality of grooves (27) matched with the blocking strips (22), the compression part is provided with a plurality of evenly distributed water permeation holes (23), the water permeation holes (23) are located between adjacent two blocking strips (22), the lower end of the block (5) is fixedly connected with a plurality of stirring teeth (26).

4. The apparatus for pretreatment of waste biomass for pyrolysis gasification according to claim 1, wherein, The crushing mechanism includes a crushing roller (14), the crushing teeth (15) are fixedly connected to the side wall of the crushing roller (14) along the spiral path, the center of the crushing roller (14) is fixedly connected with a center shaft, the shaft wall of the center shaft is rotatably connected at the discharge port through two ball bearings, one side of the cabinet (6) is fixedly connected with a speed reducer (7), the output end of the speed reducer (7) extends into the cabinet (6) and is fixedly connected with the center shaft coaxially, two inclined plates (12) are fixedly connected in the cabinet (6), the lower end of the two inclined plates (12) extends above the chain plate conveyor (13).

5. A pre-treatment device for pyrolysis gasification of waste biomass according to claim 4, characterized in that, The lower end discharge port of the feeding hopper (1) is rotatably connected with a transmission shaft through a rolling bearing, the shaft wall of the transmission shaft is fixedly connected with a cleaning roller (21), one end of the cleaning roller (21) is fixedly connected with a first bevel gear (20), the shaft wall of the central shaft is fixedly connected with a second bevel gear (18), the sidewall of the feeding hopper (1) is rotatably connected with a transmission shaft through a bearing seat, both ends of the transmission shaft are fixedly connected with third bevel gears (19), the first bevel gear (20) is engaged with one of the third bevel gears (19), and the second bevel gear (18) is engaged with the other third bevel gear (19).

6. The apparatus for pretreatment of waste biomass for pyrolysis gasification according to claim 1, wherein The lower end discharge port of the feeding hopper (1) is rotatably connected with a transmission shaft through a rolling bearing, the shaft wall of the transmission shaft is fixedly connected with a cleaning roller (21), one end of the cleaning roller (21) is fixedly connected with a first bevel gear (20), the shaft wall of the central shaft is fixedly connected with a second bevel gear (18), the sidewall of the feeding hopper (1) is rotatably connected with a transmission shaft through a bearing seat, both ends of the transmission shaft are fixedly connected with third bevel gears (19), the first bevel gear (20) is engaged with one of the third bevel gears (19), and the second bevel gear (18) is engaged with the other third bevel gear (19).

7. The apparatus for pretreatment of waste biomass for pyrolysis gasification according to claim 3, wherein The water seepage holes (23) are arranged in multiple layers on the sidewall of the feeding hopper (1), and the lower end of the water collecting cover (17) is lower than the height of the lowermost water seepage hole (23).

8. The apparatus for pretreatment of waste biomass for pyrolysis gasification according to claim 1, wherein, The air supply pipeline (8) comprises one main pipeline, two auxiliary pipelines, a plurality of cross pipes and a plurality of elbow pipes, the two main pipelines are located on the two sides of the frame of the chain plate conveyor (13), the plurality of cross pipes are uniformly distributed and fixed on the sidewalls of the two auxiliary pipelines, one end of the cross pipe for air outlet passes through the frame of the chain plate conveyor (13), and the plurality of elbow pipes are uniformly distributed and fixed on the sidewalls of the two auxiliary pipelines, and one end of the elbow pipe for air outlet is located on one side of the intermediate roller of the chain plate conveyor (13).

9. The apparatus for pretreatment of waste biomass for pyrolysis gasification according to claim 1, wherein, The air collecting cover (11) is fixedly connected in the case (6), the upper end of the air collecting cover (11) is fixedly connected with the pipeline fan (10), the air outlet end of the pipeline fan (10) is fixedly connected with an exhaust pipe, one end of the exhaust pipe extends out of the case (6), and the air collecting cover (11) is located above the discharge port on one side of the case (6).

Images