Gasification reactor and process for biomass

Abstract

The invention relates to the technical field of gasification reaction equipment, and discloses a gasification reactor for biomass and a process wherein the gasification reactor for biomass comprises a gasification tank, a first fixing block is arranged in the gasification tank, a plate frame is hinged to the first fixing block, and a plurality of grating plates are arranged on the plate frame at equal intervals; a pair of arc-shaped rods is installed on the inner wall of the gasification tank, the arc-shaped rods are slidably connected with the plate frame in an inserted mode, the arc-shaped rods are sleeved with compressed springs and first tension springs, the compressed springs are located below the plate frame, the top ends of the compressed springs are connected with the plate frame, the first tension springs are located above the plate frame, the bottom ends of the first tension springs are connected with the plate frame, and an extrusion plate is fixedly installed in the gasification tank and located above the plate frame. And the cutting plate at the bottom of the extrusion plate cuts the large biomass raw materials, the large biomass raw materials are disassembled into small blocks, the biomass raw materials can be fully dried when falling down, and meanwhile, the biomass materials can be fully gasified when falling down to a pyrolysis layer, an oxidation layer and a reduction layer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gasification reaction equipment, in particular to a gasification reactor for biomass and a process. BACKGROUND

[0002] Biomass gasification is a technology that converts solid biomass such as straw and sawdust into synthesis gas mainly composed of carbon monoxide and hydrogen under anoxic or limited oxygen conditions through a thermochemical reaction. The complete process includes four consecutive steps: raw material pretreatment, gasification reaction, gas purification, and synthesis gas utilization. Raw material pretreatment involves natural air-drying or hot air drying, followed by crushing with a crusher to increase the specific surface area. During the gasification reaction, the pretreated raw material enters the gasifier, where it undergoes a series of reactions under the action of gasification agents such as air, oxygen, or steam. The process includes a drying layer (water evaporation) at 100-250℃, a pyrolysis layer (biomass decomposition into volatile matter and coke) at 250-600℃, an oxidation layer (coke reacts with oxygen to release heat, providing energy for subsequent reactions) at 600-1000℃, and a reduction layer (carbon dioxide and steam react with coke to generate synthesis gas) at 800-1100℃. The purified synthesis gas can be used for energy supply. Biomass gasification is an important technology for realizing the resource utilization of agricultural and forestry waste and replacing clean energy.

[0003] In the prior art, the pretreated biomass raw material still contains a certain amount of water. The presence of water causes the biomass raw material to clump. When the clumped biomass material falls into the drying layer, it cannot be fully dried. When the clumped biomass material falls into the pyrolysis layer, oxidation layer, and reduction layer, it cannot fully undergo gasification reaction. Therefore, we propose a gasification reactor for biomass and a process. SUMMARY

[0004] The present application provides a gasification reactor for biomass and a process, which can solve the problem of clumping of biomass raw material due to the presence of water in the pretreated biomass raw material in the prior art mentioned in the background. The clumped biomass material cannot be fully dried in the drying layer, and it cannot fully undergo gasification reaction when it falls into the pyrolysis layer, oxidation layer, and reduction layer.

[0005] In order to achieve the above object, the scheme provides a gasification reactor for biomass, which comprises a gasification tank, a first fixed block is arranged in the gasification tank, a plate frame is hinged to the first fixed block, a plurality of grid plates are equidistantly arranged on the plate frame, a pair of arc-shaped rods are installed on the inner wall of the gasification tank, the arc-shaped rods are slidingly inserted into the plate frame, a compression spring and a first tension spring are sleeved on the arc-shaped rods, the compression spring is located below the plate frame, the top end of the compression spring is connected with the plate frame, the first tension spring is located above the plate frame, and the bottom end of the first tension spring is connected with the plate frame, and an extrusion plate is fixedly installed in the gasification tank and located above the plate frame.

[0006] Optionally, a baffle is installed at one end of the plate frame close to the extrusion plate, a discharging hole is formed in the plate frame, and a discharge mechanism is arranged adjacent to the discharging hole. The extrusion plate is provided with a cutting plate, and the cutting plate is arranged adjacent to the discharging hole.

[0007] Optionally, a rotating plate is hinged to the bottom end of the baffle, a first torsional spring is arranged at one end of the rotating plate, one end of the first torsional spring is connected with the rotating plate, and the other end of the first torsional spring is connected with the baffle. A push rod is slidingly inserted into the extrusion plate, a second tension spring is sleeved on the push rod, and the other end of the second tension spring is connected with the extrusion plate.

[0008] Optionally, a plurality of through slots are equidistantly formed in the grid plates, and an anti-blocking mechanism is arranged on the plate frame, the anti-blocking mechanism comprises a movable rod, and the movable rod is inserted into the through slots.

[0009] Optionally, an installation plate is installed on the side of the plate frame, a reciprocating rod is slidingly inserted into the installation plate, and one end of the reciprocating rod is fixedly connected with the movable rod. A reciprocating spring is sleeved on the reciprocating rod, the other end of the reciprocating spring is connected with the installation plate, an arc-shaped plate is arranged on the first fixed block, a plurality of convex blocks are annularly distributed on the arc-shaped plate, and the arc-shaped surface of the convex blocks is in sliding contact with one end of the reciprocating rod.

[0010] Optionally, a drying mechanism is arranged in the gasification tank, the drying mechanism comprises a second fixed block, the second fixed block is installed on the inner wall of the gasification tank, a drying plate is hinged to the second fixed block, a plurality of through holes are formed in the drying plate, and the drying plate is located directly below the discharging hole.

[0011] Optionally, a second torsional spring is arranged at one end of the drying plate, one end of the second torsional spring is connected with the drying plate, and the other end of the second torsional spring is connected with the second fixed block. The plate frame is provided with a connecting rod on the side close to the first fixed block, and the bottom end of the connecting rod is connected with a supporting rod which is in abutment with the bottom of the drying plate.

[0012] Optionally, the drying plate is provided with a vertical plate at both ends, and the drying plate is provided with an inclined plate at the end away from the second fixed block.

[0013] Optionally, the first fixed block is provided in an inclined manner at the top end of the second fixed block, the first fixed block is provided with a first folding cloth, the other end of the first folding cloth is connected with the plate frame, the second fixed block is provided with a second folding cloth, and the other end of the second folding cloth is connected with the drying plate.

[0014] According to a second aspect of the present application, a process for biomass gasification is provided, comprising the gasification reactor for biomass as described above, comprising the following steps: S1, pretreatment: the biomass raw material is crushed, the particle size is controlled to be 3-50 mm, and the free water in the biomass raw material particles is removed, so that the moisture content of the raw material particles is reduced to 10-20%; S2, feeding: the pretreated biomass raw material is transported into the gasification tank; S3, drying: the biomass raw material is further dehydrated in the drying area of the gasification tank, and the moisture content is reduced to below 5%, and the specific process is as follows: a1, intercepting the lumps in the biomass raw material by using a grid plate, the raw material with a particle size less than 10 mm directly falls, and the raw material with a particle size greater than or equal to 10 mm is intercepted by the grid plate; a2, cutting the intercepted biomass raw material lumps, and the cut raw material lumps fall onto the drying plate for baking; a3, after the cut raw material lumps are baked, the drying plate is inclined, and the baked raw material falls; S4, gasification reaction: the biomass raw material enters the gasification area, and under the action of high temperature and gasification agent, pyrolysis, oxidation and reduction reactions occur to generate combustible gas; S5, gas purification: the generated combustible gas is sequentially subjected to dust removal, decoking and desulfurization treatment to obtain clean gas.

[0015] Through the above technical solution, the gasification reactor for biomass and the process provided by the present application have the following advantages in use: the biomass raw material with a larger particle size rolls along the inclined plate frame, after the plate frame is reset under the action of the compression spring and the first tension spring, the biomass raw material with a larger particle size is gathered near the baffle, when the plate frame is reset, the cutting plate at the bottom of the pressing plate cuts the large biomass raw material, the large biomass raw material is disassembled into small pieces, which is convenient for the biomass raw material to be fully dried when falling, and is also conducive to the biomass material to fully perform the gasification reaction when falling to the pyrolysis layer, the oxidation layer and the reduction layer; In addition, the cut biomass raw material falls on the drying plate, the gasification tank has a hot air flow from bottom to top, the hot air flow passes through the through hole on the drying plate to deeply roast the cut biomass raw material, when the next time the biomass raw material is added to the gasification tank, the impact of the biomass raw material drives the deflection of the plate frame, the plate frame further drives the support rod to move through the connecting rod, the support rod loses the support of the drying plate, the drying plate is deflected downward under the action of the No. 2 torsional spring, and the deeply dehydrated biomass raw material rolls down along the drying plate, so that the water content of the caked biomass raw material is further reduced, and the subsequent gasification degree of the biomass material is ensured.

[0016] Other features and advantages of the present application will be further described in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the present application, but do not constitute a limitation on the present application. In the drawings: Figure 1 It is an internal structure diagram of the gasification tank of the present application.

[0018] Figure 2 It is a structure diagram of the plate frame of the present application.

[0019] Figure 3 It is an enlarged structure diagram of the part A in the present application. Figure 2

[0020] Figure 4 It is a structure diagram of the extrusion plate of the present application.

[0021] Figure 5 It is a structure diagram of the anti-blocking mechanism and the drying mechanism of the present application.

[0022] Figure 6 It is a cross-sectional structure diagram of the plate frame of the present application.

[0023] Figure 7 It is an enlarged structure diagram of the part B in the present application. Figure 6

[0024] Figure 8 It is an enlarged structure diagram of the part C in the present application. Figure 6

[0025] Figure 9 It is a schematic diagram of the position change of the drying plate of the present application.

[0026] Figure 10 It is a schematic diagram of the installation structure of the drying plate of the present application.

[0027] ​​​Explanation of reference signs: 101, gasification tank; 201, first fixed block; 202, plate frame; 203, arc-shaped rod; 204, compression spring; 205, first tension spring; 206, extrusion plate; 207, push rod; 208, cutting plate; 209, grating plate; 211, second tension spring; 212, through slot; 213, baffle; 214, support rod; 215, connecting rod; 216, first folding cloth; 217, rotating plate; 218, blanking hole; 219, first torsion spring; 300, anti-blocking mechanism; 301, arc-shaped plate; 302, protruding block; 303, reciprocating rod; 304, movable rod; 305, reciprocating spring; 306, mounting plate; 400, drying mechanism; 401, second fixed block; 402, drying plate; 403, vertical plate; 404, inclined plate; 405, through hole; 406, second folding cloth; 407, second torsion spring. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a sufficient understanding of the present application. However, the present application can be implemented in many other different ways than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first, second" are used to distinguish one element from another element, and do not have sequentiality and importance. In addition, the following description, when referring to the drawings, the same reference signs in different drawings represent the same or similar elements, and the present application does not make redundant descriptions here.

[0030] In the present solution, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present solution can be understood according to the specific circumstances.

[0031] According to some embodiments of the present solution, a gasification reactor for biomass is provided, referring to Figures 1 to 10 The gasification reactor for biomass includes a gasification tank 101, a first fixed block 201 is arranged in the gasification tank 101, a plate frame 202 is hinged on the first fixed block 201, a plurality of grid plates 209 are equidistantly arranged on the plate frame 202, a pair of arc-shaped rods 203 are installed on the inner wall of the gasification tank 101, the arc-shaped rods 203 are slidingly inserted with the plate frame 202, a compression spring 204 and a first tension spring 205 are sleeved on the arc-shaped rods 203, the compression spring 204 is located below the plate frame 202, and the top end of the compression spring 204 is connected with the plate frame 202, the first tension spring 205 is located above the plate frame 202, and the bottom end of the first tension spring 205 is connected with the plate frame 202, and an extrusion plate 206 is fixedly installed in the gasification tank 101, and the extrusion plate 206 is located above the plate frame 202.

[0032] In this way, after the biomass raw materials are put into the gasification tank 101, the biomass raw materials fall on the grid plates 209 on the plate frame 202, the biomass raw materials with smaller particle sizes fall through the gaps between the grid plates 209, and the biomass raw materials with larger particle sizes are intercepted by the grid plates 209. Under the impact of the falling biomass raw materials, the plate frame 202 deflects against the compression spring 204 and the first tension spring 205, the biomass raw materials with larger particle sizes roll along the inclined plate frame 202, and after the plate frame 202 resets under the action of the compression spring 204 and the first tension spring 205, the biomass raw materials with larger particle sizes roll to the position directly below the extrusion plate 206. The plate frame 202 and the extrusion plate 206 jointly extrude the biomass raw materials with larger particle sizes, so that the biomass raw materials are dispersed into smaller particle sizes.

[0033] It should be noted that after the plate frame 202 is deflected and inclined, the biomass raw materials with larger particle sizes may directly roll along the plate frame 202 before being extruded, therefore, please refer to Figure 6 , Figure 7, the plate frame 202 is provided with a baffle plate 213 close to one end of the extrusion plate 206, the plate frame 202 is provided with a discharging hole 218, the discharging hole 218 is provided adjacent to the discharging hole 218, the extrusion plate 206 is provided with a cutting plate 208, the cutting plate 208 is provided adjacent to the discharging hole 218, the baffle plate 213 is provided to prevent the biomass raw material with large particle size from directly rolling along the plate frame 202, the biomass raw material with large particle size is gathered near the baffle plate 213, when the plate frame 202 is reset, the cutting plate 208 at the bottom of the extrusion plate 206 cuts the large biomass raw material, and the cut biomass raw material falls through the discharging hole 218.

[0034] In addition, the bottom end of the baffle plate 213 is hingedly connected with a rotating plate 217, one end of the rotating plate 217 is provided with a first torsional spring 219, one end of the first torsional spring 219 is connected with the rotating plate 217, the other end of the rotating plate 217 is connected with the baffle plate 213, the extrusion plate 206 is slidingly inserted with a push rod 207, the push rod 207 is sleeved with a second tension spring 211, the other end of the second tension spring 211 is connected with the extrusion plate 206, it should be noted that the rotating plate 217 seals the discharging hole 218 in the normal state, the rotating plate 217 is provided to prevent the biomass raw material from directly falling through the discharging hole 218 before cutting, in addition, after the biomass raw material is cut, the bottom end of the push rod 207 pushes the biomass raw material downward, forcing the rotating plate 217 to deflect, the discharging hole 218 is opened, thereby completing the discharging of the biomass raw material.

[0035] The embodiment also provides a process for biomass gasification, including the following specific steps: S1, pretreatment: the biomass raw material is crushed, the particle size is controlled to be 3-50mm, the free water in the biomass raw material particles is removed, and the moisture content of the raw material particles is reduced to 10%-20%; S2, feeding: the pretreated biomass raw material is transported into the gasification tank 101; S3, drying: the biomass raw material is further dehydrated in the drying area of the gasification tank 101, and the moisture content is reduced to below 5%, and the specific process is as follows: a1, the agglomerates in the biomass raw material are intercepted by the grid plate 209, the raw material with a particle size less than 10mm directly falls, and the raw material with a particle size greater than or equal to 10mm is intercepted by the grid plate 209; a2, the intercepted biomass raw material agglomerates are cut, and the cut raw material agglomerates fall onto the drying plate 402 for baking; a3, after the cut raw material agglomerates are baked, the drying plate 402 is inclined, and the baked raw material falls; S4, gasification reaction: the biomass raw material enters the gasification area, and under the action of high temperature and gasification agent, pyrolysis, oxidation and reduction reactions occur, generating combustible gas; S5, gas purification: the generated combustible gas is sequentially subjected to dust removal, coke removal and desulfurization treatment to obtain clean gas.

[0036] By the above technical scheme, the biomass gasification reactor and process provided by the scheme are used in the following manner: the biomass raw material with a large particle size rolls along the inclined plate frame 202, the plate frame 202 is reset under the action of the compression spring 204 and the first tension spring 205, the biomass raw material with a large particle size is gathered near the baffle 213, the cutting plate 208 at the bottom of the extrusion plate 206 cuts the biomass raw material with a large particle size when the plate frame 202 is reset, and the cut biomass raw material falls through the discharge hole 218. Therefore, the device automatically decomposes the biomass raw material agglomerate by using the cutting plate 208 at the bottom of the extrusion plate 206 to disassemble the biomass raw material with a large particle size into small pieces, facilitates the biomass raw material to be fully dried when falling, and is beneficial to the biomass material to fully perform the gasification reaction when falling to the pyrolysis layer, the oxidation layer and the reduction layer.

[0037] It should be noted that the drying layer with a temperature of 100-250℃, the pyrolysis layer with a temperature of 250-600℃, the oxidation layer with a temperature of 600-1000℃ and the reduction layer with a temperature of 800-1100℃ are arranged in the gasification tank 101 from top to bottom, the plate frame 202 is arranged above the drying layer, the gasification tank 101 is provided with a gas inlet at the bottom and a gas outlet at the top, the gasification agent enters the gasification tank 101 through the gas inlet, and the synthesis gas in the gasification tank 101 gradually rises and is discharged through the gas outlet. The specific structure and working principle of the drying layer, the pyrolysis layer, the oxidation layer and the reduction layer belong to the prior art and are well known to those skilled in the art, and will not be described here.

[0038] In some embodiments of the present scheme, as shown in Figure 2 , Figure 3 The grid plate 209 is provided with a plurality of through slots 212 at equal intervals, the plate frame 202 is provided with an anti-blocking mechanism 300, the anti-blocking mechanism 300 includes a movable rod 304, the movable rod 304 is inserted into the through slot 212, and when the movable rod 304 continuously moves in the through slot 212, the movable rod 304 repeatedly pushes the blocked biomass raw material, so that the biomass raw material falls from the adjacent grid plate 209, thereby achieving the effect of preventing blocking.

[0039] Specifically, the plate frame 202 is provided with a mounting plate 306 on the side, a reciprocating rod 303 is slidably inserted on the mounting plate 306, the reciprocating rod 303 is fixedly connected with one end of the movable rod 304, a reciprocating spring 305 is sleeved on the reciprocating rod 303, the other end of the reciprocating spring 305 is connected with the mounting plate 306, the arc-shaped plate 301 is arranged on the first fixed block 201, a plurality of protrusions 302 are annularly arranged on the arc-shaped plate 301, the protrusions 302 are arranged as arc-shaped protrusions, the arc-shaped surfaces of the protrusions 302 are in sliding contact with one end of the reciprocating rod 303, wherein the center of the arc-shaped plate 301 is collinear with the rotation shaft of the plate frame 202, when the plate frame 202 is deflected, one end of the reciprocating rod 303 constantly collides with the protrusions 302 at the edge of the arc-shaped plate 301, so that the reciprocating rod 303 constantly reciprocates along the stretching direction of the reciprocating spring 305, and at the same time, the reciprocating rod 303 drives the movable rod 304 to constantly move in the through slot 212.

[0040] In some embodiments of the present scheme, as shown in Figure 5 , Figure 6 , Figure 8 , the drying mechanism 400 is arranged in the gasification tank 101, the drying mechanism 400 comprises a second fixed block 401, the second fixed block 401 is mounted on the inner wall of the gasification tank 101, a drying plate 402 is hingedly connected to the second fixed block 401, a plurality of through holes 405 are formed in the drying plate 402, and the drying plate 402 is located directly below the discharging hole 218.

[0041] Specifically, as shown in Figure 8 , one end of the drying plate 402 is provided with a second torsional spring 407, one end of the second torsional spring 407 is connected with the drying plate 402, the other end of the second torsional spring 407 is connected with the second fixed block 401, a connecting rod 215 is mounted on the side of the plate frame 202 close to the first fixed block 201, a supporting rod 214 is connected to the bottom end of the connecting rod 215, and the supporting rod 214 is in contact with the bottom of the drying plate 402.

[0042] It should be noted that the gasification tank 101 has a hot gas flow from bottom to top, the hot gas flow passes through the through holes 405 on the drying plate 402 to deeply roast the cut biomass raw materials, and the water content of the caked biomass raw materials is sufficiently reduced. Specifically, the cut biomass raw materials fall on the drying plate 402, and at this time, the drying plate 402 cannot be deflected because the supporting rod 214 supports the drying plate 402. When the biomass raw materials are added to the gasification tank 101 next time, the impact of the biomass raw materials drives the plate frame 202 to deflect, the plate frame 202 further drives the supporting rod 214 to move through the connecting rod 215, the supporting rod 214 loses the support for the drying plate 402, the drying plate 402 is deflected downward under the action of the second torsional spring 407, and the biomass raw materials that have been deeply dehydrated roll off along the drying plate 402.

[0043] In addition, as shown in Figure 10In order to prevent the biomass raw material from rolling along the drying plate 402, vertical plates 403 are arranged at both ends of the drying plate 402, and an inclined plate 404 is arranged at the end of the drying plate 402 away from the second fixed block 401.

[0044] In addition, please refer to Figure 6 The first fixed block 201 and the second fixed block 401 are arranged in an inclined manner at the top end, the first fixed block 201 is provided with a first folding cloth 216, the other end of the first folding cloth 216 is connected with the plate frame 202, the second fixed block 401 is provided with a second folding cloth 406, the other end of the second folding cloth 406 is connected with the drying plate 402, therefore, when the biomass raw material is fed, the top inclined surface of the first fixed block 201 guides the biomass raw material to fall on the grid plate 209, at the same time, the first folding cloth 216 shields the hinged part of the plate frame 202 to prevent the hinged part of the plate frame 202 from being blocked, and the top inclined surface of the second fixed block 401 guides the cut biomass raw material to fall on the drying plate 402, at the same time, the second folding cloth 406 is used to prevent the hinged part of the drying plate 402 from being blocked.

[0045] It should be noted that the first folding cloth 216 and the second folding cloth 406 are both ceramic fiber cloth, which can withstand 1000℃ for a long time, and the temperature of the drying layer of the gasification tank 101 is between 100-250℃, therefore, the ceramic fiber cloth meets the working environment requirements.

[0046] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0047] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, in order to avoid unnecessary repetition, the present application will not further describe various possible combination manners.

[0048] In addition, the various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the technical concept of the present application, it should also be considered as the disclosed content of the present application.

Claims

1. A gasification reactor for biomass comprising a gasification tank (101), characterized in that: The gasification tank (101) is provided with a fixed block (201), the fixed block (201) is hinged with a plate frame (202), a plurality of grid plates (209) are equidistantly arranged on the plate frame (202), a pair of arc-shaped rods (203) are installed on the inner wall of the gasification tank (101), the arc-shaped rods (203) are slidably inserted with the plate frame (202), the arc-shaped rods (203) are sleeved with compression springs (204) and a first tension spring (205), the compression springs (204) are located below the plate frame (202), the top end of the compression spring (204) is connected with the plate frame (202), the first tension spring (205) is located above the plate frame (202), and the bottom end of the first tension spring (205) is connected with the plate frame (202), and an extrusion plate (206) is fixedly installed in the gasification tank (101), and the extrusion plate (206) is located above the plate frame (202).

2. The gasification reactor for biomass according to claim 1, wherein: The plate frame (202) is provided with a baffle (213) at one end close to the extrusion plate (206), and a discharging hole (218) is formed in the plate frame (202), and the discharging hole (218) is adjacent to the discharging hole (218); The extrusion plate (206) is provided with a cutting plate (208), and the cutting plate (208) is adjacent to the discharging hole (218).

3. The gasification reactor for biomass according to claim 2, wherein: The bottom end of the baffle (213) is hinged with a rotating plate (217), one end of the rotating plate (217) is provided with a first torsional spring (219), one end of the first torsional spring (219) is connected with the rotating plate (217), and the other end of the rotating plate (217) is connected with the baffle (213); The extrusion plate (206) is slidably inserted with a push rod (207), the push rod (207) is sleeved with a second tension spring (211), and the other end of the second tension spring (211) is connected with the extrusion plate (206).

4. The gasification reactor for biomass according to claim 1, wherein: A plurality of through grooves (212) are equidistantly formed in the grid plate (209), and a anti-blocking mechanism (300) is arranged on the plate frame (202), the anti-blocking mechanism (300) comprises a movable rod (304), and the movable rod (304) penetrates the through groove (212).

5. A gasification reactor for biomass according to claim 4, characterized in that: The plate frame (202) is provided with a mounting plate (306), the mounting plate (306) is slidably inserted with a reciprocating rod (303), and one end of the reciprocating rod (303) is fixedly connected with the movable rod (304); The reciprocating rod (303) is sleeved with a reciprocating spring (305), and the other end of the reciprocating spring (305) is connected with the mounting plate (306), the first fixed block (201) is provided with an arc-shaped plate (301), a plurality of convex blocks (302) are annularly distributed on the arc-shaped plate (301), and the arc-shaped surface of the convex block (302) is in sliding contact with one end of the reciprocating rod (303).

6. The gasification reactor for biomass according to claim 2, wherein: The gasification tank (101) is internally provided with a drying mechanism (400), the drying mechanism (400) comprises a second fixed block (401), the second fixed block (401) is installed on the inner wall of the gasification tank (101), a drying plate (402) is hinged to the second fixed block (401), a plurality of through holes (405) are formed in the drying plate (402), and the drying plate (402) is located directly below the discharging hole (218).

7. A gasification reactor for biomass according to claim 6, characterized in that: One end of the drying plate (402) is provided with a second torsional spring (407), one end of the second torsional spring (407) is connected with the drying plate (402), and the other end of the second torsional spring (407) is connected with the second fixed block (401). A connecting rod (215) is installed on one side of the plate frame (202) close to the first fixed block (201), a supporting rod (214) is connected to the bottom end of the connecting rod (215), and the supporting rod (214) abuts against the bottom of the drying plate (402).

8. A gasification reactor for biomass according to claim 7, characterized in that: Vertical plates (403) are arranged at both ends of the drying plate (402), and an inclined plate (404) is installed at the end of the drying plate (402) away from the second fixed block (401).

9. A gasification reactor for biomass according to claim 8, characterized in that: The first fixed block (201) and the second fixed block (401) are obliquely arranged at the top ends, a first folding cloth (216) is installed on the first fixed block (201), the other end of the first folding cloth (216) is connected with the plate frame (202), a second folding cloth (406) is installed on the second fixed block (401), and the other end of the second folding cloth (406) is connected with the drying plate (402).

10. A process for gasification of biomass, characterized by: The gasification reactor for biomass according to any one of claims 1-9 comprises the following steps: S1, pretreatment: the biomass raw material is crushed, the particle size is controlled to be 3-50 mm, free water in the biomass raw material particles is removed, and the moisture content of the raw material particles is reduced to 10-20%; S2, feeding: the pretreated biomass raw material is transported into the gasification tank (101); S3, drying: the biomass raw material is further dehydrated in the drying area of the gasification tank (101), and the moisture content is reduced to below 5%, and the specific process is as follows: a1, the caked biomass raw material is intercepted by the grid plate (209), the raw material with a particle size of less than 10 mm directly falls, and the raw material with a particle size of greater than or equal to 10 mm is intercepted by the grid plate (209); a2, the intercepted biomass raw material caked is cut, and the cut raw material caked falls onto the drying plate (402) for baking; a3, after the cut raw material caked is baked, the drying plate (402) is inclined, and the baked raw material falls; S4, gasification reaction: the biomass raw material enters the gasification area, and pyrolysis, oxidation and reduction reactions occur under the action of high temperature and gasification agents, to generate combustible gas; S5, gas purification: the generated combustible gas is sequentially subjected to dust removal, decoking and desulfurization treatment, to obtain clean gas.

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