Horizontal heat-charcoal co-production furnace based on forestry and agricultural residues

Abstract

The invention relates to the technical field of agricultural and forestry waste treatment, and provides an agricultural and forestry waste-based horizontal heat-charcoal co-production furnace, which comprises a furnace body and a plurality of groups of conveying chain plates arranged in the furnace body, and the plurality of groups of conveying chain plates are arranged along the length direction of the furnace body at intervals; the output end of the front conveying chain plate is located above the input end of the rear conveying chain plate, each conveying chain plate comprises a transmission shaft rotationally arranged in the furnace body, each transmission shaft is a hollow shaft, the outer wall of each transmission shaft is provided with a first air supply opening, and the end of each transmission shaft is connected with an air supply pipe through a rotary connector. The first air supply opening is used for supplying air needed by material combustion into the furnace body, and pyrolysis gas generated by material combustion can be pressurized through an external draught fan and then conveyed to heat using equipment to provide heat energy for the outside. By means of the technical scheme, the technical problems that in the prior art, carbonization equipment cannot accurately supply oxygen to the position where materials are located, oxygen enters the furnace body and cannot participate in combustion at the first time, and the pyrolysis effect is affected are solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of agricultural and forestry waste treatment, and in particular, to a horizontal heat-carbon cogeneration furnace based on agricultural and forestry waste. Background Art

[0002] With the large-scale development of agriculture and forestry, the amount of agricultural and forestry waste generated is increasing, and waste such as straw and wood chips has emerged in large quantities. The traditional method of treating agricultural and forestry waste is direct incineration, which not only pollutes the environment but also wastes resources.

[0003] Carbonization equipment is an increasingly popular method for treating agricultural and forestry waste. It operates by heating agricultural and forestry waste under conditions that isolate or restrict oxygen supply. During this process, the material undergoes drying, pyrolysis, and carbonization. After the carbonization reaction is complete, the furnace is cooled before the discharge port is opened to remove the charcoal product. The tar and gases generated during the process must be properly disposed of.

[0004] Conventional carbonization equipment cannot accurately deliver oxygen to the material within the furnace. As a result, oxygen entering the furnace cannot immediately participate in combustion, and oxygen not directly in the material's location is not fully utilized. This ultimately affects the pyrolysis effect, reduces carbonization efficiency and product quality, and limits the further development and application of agricultural and forestry waste carbonization technology. Furthermore, conventional carbonization equipment lacks measures to properly collect and utilize pyrolysis wood gas, making it impossible to export heat energy externally, resulting in a waste of thermal energy resources.

[0005] Therefore, developing an agricultural and forestry waste carbonization equipment that can accurately supply oxygen and fully utilize oxygen is an urgent problem to be solved in the field of agricultural and forestry waste treatment. Summary of the Invention

[0006] In order to overcome the above-mentioned defects, an embodiment of the present invention provides a horizontal heat-carbon cogeneration furnace based on agricultural and forestry waste, which solves the technical problem in the related art that the carbonization equipment cannot accurately supply oxygen to the location of the material, and the oxygen entering the furnace body cannot participate in combustion in the first time, thereby affecting the pyrolysis effect.

[0007] According to one aspect, at least one embodiment of the present invention provides a horizontal heat-carbon co-production furnace based on agricultural and forestry waste, including a furnace body and a plurality of sets of conveying chain plates arranged in the furnace body. An inlet and a discharge port are respectively and correspondingly arranged at the top and bottom of the furnace body. The plurality of sets of conveying chain plates are arranged at intervals along the length direction of the furnace body. The output end of the previous set of conveying chain plates is located above the input end of the next set of conveying chain plates. The conveying chain plate includes a transmission shaft rotatably arranged in the furnace body. The transmission shaft is a hollow shaft and the outer wall of the transmission shaft has a first air supply port. The end of the transmission shaft is connected to an air supply pipe through a rotary joint. The first air supply port is used to supply air required for the combustion of materials into the furnace body.

[0008] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: It further includes a negative pressure heat collection channel, which penetrates through the top wall of the furnace body. One end of the negative pressure heat collection channel is located at one end of the furnace body far from the inlet, and the other end is used to connect to a heat-using unit.

[0009] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: A material spreading roller is rotatably arranged in the furnace body. The material spreading roller is located above the conveying chain plate. Spiral material spreading teeth are arranged on the outer circumference of the material spreading roller. Two sets of the material spreading teeth are symmetrically arranged along the middle of the material spreading roller, and the rotation directions of the two sets of material spreading teeth are opposite. The material spreading teeth can be driven by the material spreading roller to insert into the material pile and apply a force to the material pile to spread to both sides of the conveying chain plate or to gather towards the central axis of the conveying chain plate.

[0010] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: A plurality of the material spreading rollers are arranged at intervals along the length direction of the furnace body. The two adjacent material spreading rollers before and after are respectively used to apply a force to the material pile to spread to both sides of the conveying chain plate and to gather towards the central axis of the conveying chain plate.

[0011] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: The material spreading roller includes a plurality of roller body modules that are detachably assembled in sequence along the axial direction.

[0012] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: The inside of the material spreading roller is hollow and is used to connect to a gas supply unit. The surface of the material spreading roller has a second air supply port, and the second air supply port is used to convey air required for combustion to the material pile.

[0013] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: The surface of the bulk material roller has a plurality of mounting holes, the bulk material teeth are slidably arranged in the mounting holes, a spring is connected between the bulk material teeth and the inner wall of the bulk material roller, the spring is used to provide a force for the bulk material teeth to approach the axis of the bulk material roller, and a support inner cylinder is slidably arranged along the axial direction inside the bulk material roller. The end of the support inner cylinder has a guiding conical surface, and the support inner cylinder can support the bulk material teeth outward so that the bulk material teeth protrude out of the mounting holes.

[0014] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: A material guiding plate is arranged inside the furnace body. The material guiding plate is located below the feeding port and extends obliquely downward toward the side close to the conveying chain plate, and is used to guide the materials in the feeding port to fall onto the conveying chain plate.

[0015] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: A baffle extending downward is arranged inside the furnace body. The baffle is located above the conveying chain plate and is used to limit the height of the material pile.

[0016] For example, in a horizontal heat-carbon co-production furnace based on agricultural and forestry waste provided by at least one embodiment of the present invention, it further includes: Adjacent roller body modules are connected by means of flanges.

[0017] The beneficial effects of the embodiments of the present invention are as follows: In the present invention, when carbonization treatment is carried out, first, the feeding port at the top of the furnace body is opened, and agricultural and forestry waste is conveyed into the furnace body. After the feeding is completed, the feeding port is closed to make the furnace body form a relatively closed space. At this time, the materials in the furnace body are ignited by an ignition element (such as an electric igniter or a gas igniter) penetrating into the furnace body. Air enters the inside of the transmission shaft through the air supply pipe and the rotary joint, and finally is discharged from the first air supply port on the outer wall of the transmission shaft. Because the first air supply port is arranged on the transmission shaft of the conveying chain plate, the discharged air can directly be discharged upward through the gaps of the upper conveying chain plate to the place where the materials are located, realizing accurate oxygen supply. When oxygen enters the furnace body, it can participate in combustion, ensuring that oxygen is fully utilized. With the rotation of the transmission shaft, oxygen is evenly distributed, so that the materials are evenly heated during the combustion process and sufficient pyrolysis reaction is carried out. In a closed anoxic environment, the materials undergo flameless anaerobic combustion and successively experience the drying, pyrolysis, and carbonization stages.

[0018] During the combustion process of the material, the conveying chain plate runs slowly driven by the transmission shaft, transporting the material from one end of the furnace body to the other end. Since the output end of the previous group of conveying chain plates is located above the input end of the next group of conveying chain plates, when the material moves to the output end along with the conveying chain plate, it will naturally fall onto the next group of conveying chain plates. During the falling process, the material will turn over and become looser, making the combustion pyrolysis reaction of the material more uniform and sufficient. When the carbonization reaction of the material is completed, wait for the furnace body to cool to an appropriate temperature, open the discharge port at the bottom of the furnace body, and discharge the carbon product. The pyrolysis gas generated by the combustion of the material can be pressurized by an external blower and input into the heat-using unit to output thermal energy while producing carbon. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present invention and these drawings.

[0020] Figure 1 Structural schematic diagram of a horizontal thermal-carbon co-production furnace based on agricultural and forestry waste from one angle in an embodiment of the present invention; Figure 2 For Figure 1 Structural schematic diagram of a horizontal thermal-carbon co-production furnace based on agricultural and forestry waste from another angle in the embodiment of; Figure 3 For Figure 1 Internal structural schematic diagram of the furnace body in the embodiment of; Figure 4 For Figure 1 Structural schematic diagram of the bulk material roller in the embodiment of; Figure 5 For Figure 1 Internal structural schematic diagram of the roller body module in the embodiment of; Figure 6 For Figure 1 Structural schematic diagram of the support inner cylinder in the embodiment of.

[0021] In the figure: 1. Furnace body, 2. Conveying chain plate, 101. Feeding port, 102. Discharge port, 3. Transmission shaft, 301. First air supply port, 4. Rotary joint, 5. Air supply pipe, 6. Negative pressure heat collection channel, 7. Bulk material roller, 8. Bulk material teeth, 701. Roller body module, 702. Second air supply port, 703. Installation hole, 9. Spring, 10. Support inner cylinder, 1001. Guide cone surface, 11. Guide plate, 12. Baffle. Detailed Embodiments

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0023] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0024] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0027] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] like Figures 1 to 6As shown, it shows a horizontal thermal-carbon co-production furnace based on agricultural and forestry waste in an embodiment of the present invention, including a furnace body 1 and multiple groups of conveying chain plates 2. At the top of one end and the bottom of the other end of the furnace body 1, a feeding port 101 and a discharging port 102 are respectively arranged in one-to-one correspondence, and both the feeding port 101 and the discharging port 102 are equipped with openable and closable gate plates. The feeding port 101 is used to convey agricultural and forestry waste into the furnace body 1, and the discharging port 102 is used to discharge carbon products after the carbonization reaction ends.

[0029] Multiple groups of conveying chain plates 2 are arranged in the furnace body 1 along the length direction of the furnace body 1. Each group of conveying chain plates 2 includes a sprocket, a chain, and chain plates installed on the chain. A transmission shaft 3 penetrates the side wall of the furnace body 1 and is rotatably arranged on the furnace body 1 through a bearing seat, and is driven to rotate by a motor installed outside the furnace body 1. The sprocket is installed on the transmission shaft 3. The transmission shaft 3 is a hollow shaft, and first air supply ports 301 are evenly distributed on the outer wall. The output end of the previous group of conveying chain plates 2 is located above the input end of the next group of conveying chain plates 2 (defining the direction close to the discharging port 102 as the rear and the direction away from the discharging port 102 as the front), forming a stepped layout, so that the material can be turned over and loosened during the conveying process. The end of the transmission shaft 3 is connected to an air supply pipe 5 through a rotary joint 4. Through the rotary joint 4, air can be conveyed into the transmission shaft 3 without affecting the rotation of the transmission shaft 3. One end of the air supply pipe 5 is connected to the rotary joint 4, and the other end is connected to an air supply unit, such as an air compressor or a blower.

[0030] When carbonization treatment is carried out, first open the feeding port 101 at the top of the furnace body 1, convey agricultural and forestry waste into the furnace body 1, and close the feeding port 101 after the feeding is completed, so that the furnace body 1 forms a relatively closed space. At this time, the material in the furnace body 1 is ignited by an ignition element (such as an electric igniter or a gas igniter) penetrating into the furnace body 1. Air enters the inside of the transmission shaft 3 through the air supply pipe 5 and the rotary joint 4, and finally is discharged from the first air supply ports 301 on the outer wall of the transmission shaft 3. Because the first air supply ports 301 are arranged on the transmission shaft 3 of the conveying chain plates 2, the discharged air can directly be discharged upward through the gaps of the upper conveying chain plates 2 to the place where the material is located, realizing accurate oxygen supply. When oxygen enters the furnace body 1, it can participate in combustion, ensuring the full utilization of oxygen. With the rotation of the transmission shaft 3, oxygen is evenly distributed, so that the material is evenly heated during the combustion process and undergoes a sufficient pyrolysis reaction. In a closed anoxic environment, the material undergoes flameless anaerobic combustion and successively experiences the drying, pyrolysis, and carbonization stages.

[0031] During the combustion process of the material, the conveying chain plate 2 runs slowly driven by the transmission shaft 3, conveying the material from one end of the furnace body 1 to the other end. Since the output end of the previous group of conveying chain plates 2 is located above the input end of the next group of conveying chain plates 2, when the material moves to the output end along with the conveying chain plate 2, it will naturally fall onto the next group of conveying chain plates 2. During the falling process, the material will turn over and become looser, making the combustion pyrolysis reaction of the material more uniform and sufficient. When the carbonization reaction of the material is completed, wait for the furnace body 1 to cool to an appropriate temperature, open the discharge port 102 at the bottom of the furnace body 1, and discharge the carbon product.

[0032] In some examples, such as Figures 1 to 3 shown, a negative pressure heat collection channel 6 is arranged inside the furnace body 1. One end of the negative pressure heat collection channel 6 is located at one end of the furnace body 1 far from the feed inlet 101, and the other end extends out of the furnace body 1 for connecting a heat-using unit, such as common equipment like a boiler, etc., to realize the effective reuse of heat energy.

[0033] During the anaerobic combustion process of agricultural and forestry waste without open flame in the furnace, a large amount of combustible gas containing heat energy will be generated. The combustible gas generated by the pyrolysis of biomass materials contains components such as carbon monoxide, hydrogen, and methane, which belong to flammable gases. In this embodiment, the combustible gas can be pressurized and transported to heat-using equipment such as boilers, drying furnaces, and heat-conducting oil furnaces through the negative pressure heat collection pipeline 6 and the fan arranged at the top of the furnace body 1, so that this equipment can output heat energy externally and realize the co-production of heat and carbon.

[0034] The inlet end of the negative pressure heat collection channel 6 is located at one end of the furnace body 1 far from the feed inlet 101, where the material has been combusted more sufficiently and the temperature of the generated heat energy gas is relatively high. Through the negative pressure generated by the fan, these high-temperature heat energy gases are sucked into the negative pressure heat collection channel 6 and finally transported to the heat-using unit, such as a boiler, etc., thus realizing the secondary utilization of heat energy and the co-production of heat and carbon, and improving the resource utilization rate.

[0035] In some examples, such as Figures 3 to 5 shown, in order to spread out the material pile in the furnace body 1 to obtain a more sufficient combustion pyrolysis reaction, a plurality of material spreading rollers 7 are arranged along the length direction inside the furnace body 1. The material spreading rollers 7 are rotatably arranged above the conveying chain plate 2 so that the material spreading rollers 7 can cover the conveying path of the material on the conveying chain plate 2.

[0036] Material spreading teeth 8 are arranged on the circumferential surface of the material spreading roller 7 along the spiral direction. The material spreading teeth 8 are symmetrically arranged into two groups along the middle of the material spreading roller 7, and the spiral directions of the two groups of material spreading teeth 8 are opposite. This design enables the material spreading roller 7 to exert a lateral force on the material pile when rotating, causing it to spread to both sides or gather towards the middle. And in order to ensure that the material spreading teeth 8 have sufficient pushing effect on the material pile, the linear speed of the rotation of the material spreading roller 7 is greater than the conveying speed of the conveying chain plate 2.

[0037] Two adjacent bulk material rollers 7 in the furnace body 1 apply forces to the material pile to spread it to both sides and to gather it towards the middle respectively. For example, the spiral direction of the bulk material teeth 8 on the previous bulk material roller 7 is designed to spread the material to both sides, while the spiral direction of the bulk material teeth 8 on the subsequent bulk material roller 7 is designed to gather the material towards the middle. This alternating arrangement causes the material to be continuously spread and gathered during the conveying process, playing a role in stirring, thereby promoting the full progress of the combustion and pyrolysis reactions of the material.

[0038] When the material is conveyed in the furnace along with the conveying chain plate 2, the bulk material roller 7 rotates at a linear speed higher than the conveying speed of the conveying chain plate 2 under the drive of the motor. Since the bulk material teeth 8 are distributed along the spiral direction on the circumferential surface of the bulk material roller 7 and the spiral directions of the two groups of bulk material teeth 8 are opposite, the bulk material teeth 8 will gradually insert into the material pile. As the bulk material roller 7 rotates, the spiral bulk material teeth 8 will apply a lateral force to the material pile. Depending on the spiral direction of the bulk material teeth 8, the material pile will be spread to both sides or gathered towards the middle. The two adjacent bulk material rollers 7 in the front and back achieve the alternating spreading and gathering operations on the material pile through different spiral directions of the bulk material teeth 8. The previous bulk material roller 7 spreads the material pile to both sides, while the subsequent bulk material roller 7 gathers the spread material back towards the middle, changing the distribution state of the material and enabling the material to undergo more sufficient combustion and pyrolysis reactions during the subsequent conveying process.

[0039] In some examples, as Figure 4 shown, the bulk material roller 7 is composed of a plurality of roller body modules 701 that are detachably assembled in sequence along the axial direction. The interior of the bulk material roller 7 is hollow, and its structure is similar to that of the transmission shaft 3 of the conveying chain plate 2. The bulk material roller 7 is connected to the air supply unit to convey the air required for combustion. The end of the bulk material roller 7 can also be connected to the air supply unit through a rotary joint 4. Second air supply ports 702 are evenly distributed on the surface of the bulk material roller 7. A plurality of mounting holes 703 are provided on the surface of the bulk material roller 7, and the bulk material teeth 8 are slidably arranged in the mounting holes 703. A spring 9 is connected between the inner wall of the bulk material roller 7 and the bulk material teeth 8, and the spring 9 provides a force for the bulk material teeth 8 to retract into the mounting holes 703. A support inner cylinder 10 is slidably arranged along the axial direction inside the bulk material roller 7, and the end of the support inner cylinder 10 has a guiding conical surface 1001.

[0040] The bulk material roller 7 is composed of a plurality of roller body modules 701 that are detachably assembled in sequence along the axial direction. When the bulk material teeth 8 in a certain area are damaged, it is not necessary to replace the entire bulk material roller 7. Only the single roller body module 701 with damaged bulk material teeth 8 needs to be disassembled and replaced, reducing the maintenance cost and difficulty. During operation, air enters the interior of the bulk material roller 7 from the air supply unit, and the air is directly sprayed onto the material pile through the second air supply port 702, achieving precise air supply to the material pile and enabling oxygen to be transported to the area where the materials are concentrated, facilitating the full combustion and pyrolysis of the materials. When the support inner cylinder 10 is inserted into the bulk material roller 7, its guiding conical surface 1001 first contacts the bulk material teeth 8, and finally the circumferential surface of the support inner cylinder 10 expands the bulk material teeth 8 outward, causing the bulk material teeth 8 to protrude from the mounting holes 703 and enabling them to be normally inserted into the material pile. As the usage time increases, the bulk material teeth 8 may adhere to materials. At this time, the support inner cylinder 10 can be withdrawn, and the elastic force of the spring 9 causes the bulk material teeth 8 to retract into the mounting holes 703. During the retraction process, the inner wall of the mounting hole 703 will scrape the surface of the bulk material teeth 8, thereby scraping off the adhered materials and realizing the automatic cleaning of the bulk material teeth 8.

[0041] In some examples, as Figure 3 shown, inside the furnace body 1, the material guiding plate 11 is arranged between the feeding port 101 and the conveying chain plate 2, and there is a certain angle between the material guiding plate 11 and the horizontal plane. When the agricultural and forestry waste enters the furnace body 1 from the feeding port 101, due to the angle between the material guiding plate 11 and the horizontal plane, the materials slide along the material guiding plate 11 under the action of their own gravity, causing the materials to be guided onto the conveying chain plate 2 and preventing the materials from piling up or scattering near the feeding port 101.

[0042] The baffle 12 is arranged above the conveying chain plate 2. During the process of the materials moving with the conveying chain plate 2, the baffle 12 plays a role in restricting the height of the material pile, enabling the materials to be kept within a suitable height range under the restriction of the baffle 12, which helps the materials to better contact the bulk material teeth 8 and oxygen, and promotes the full progress of the combustion and pyrolysis reaction.

[0043] The adjacent roller body modules 701 are connected by means of flanges. The ends of the roller body modules 701 are provided with flange plates, and a plurality of bolt holes are evenly distributed on the flange plates. By passing bolts through the bolt holes and tightening the nuts, the connection of the two roller body modules 701 is realized. When it is necessary to replace a certain roller body module 701, only the bolts need to be unscrewed, and the damaged roller body module 701 can be disassembled from the bulk material roller 7. This connection method is simple and reliable, facilitating the maintenance work of the maintenance personnel.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A horizontal heat-carbon co-production furnace based on agricultural and forestry waste, characterized in that, It includes a furnace body (1) and multiple groups of conveying chain plates (2) arranged in the furnace body (1). Feed inlets (101) and discharge outlets (102) are respectively arranged in a one-to-one correspondence at the top and bottom of the furnace body (1). The multiple groups of conveying chain plates (2) are arranged at intervals along the length direction of the furnace body (1). The output end of the previous group of conveying chain plates (2) is located above the input end of the next group of conveying chain plates (2). The conveying chain plate (2) includes a transmission shaft (3) rotatably arranged in the furnace body (1). The transmission shaft (3) is a hollow shaft and the outer wall of the transmission shaft (3) has a first air supply port (301). The end of the transmission shaft (3) is connected to an air supply pipe (5) through a rotary joint (4). The first air supply port (301) is used to supply the air required for the combustion of the materials into the furnace body (1).

2. The horizontal heat-carbon co-production furnace based on agricultural and forestry waste according to claim 1, characterized in that It further includes a negative pressure heat collection channel (6). The negative pressure heat collection channel (6) penetrates through the top wall of the furnace body (1). One end of the negative pressure heat collection channel (6) is located at one end of the furnace body (1) far from the feed inlet (101), and the other end is used to connect to a heat-using unit.

3. The horizontal heat-carbon co-production furnace based on agricultural and forestry waste according to claim 1, characterized in that, A material spreading roller (7) is rotatably arranged in the furnace body (1). The material spreading roller (7) is located above the conveying chain plate (2). The outer circumference of the material spreading roller (7) is provided with spiral material spreading teeth (8). Two groups of the material spreading teeth (8) are symmetrically arranged along the middle of the material spreading roller (7). The spiral directions of the two groups of material spreading teeth (8) are opposite. The material spreading teeth (8) can be driven by the material spreading roller (7) to insert into the material pile and apply a force to the material pile to spread it to both sides of the conveying chain plate (2) or gather it towards the central axis of the conveying chain plate (2).

4. A horizontal thermal-carbon co-production furnace based on agricultural and forestry waste according to claim 3, characterized in that, A plurality of the material spreading rollers (7) are arranged at intervals along the length direction of the furnace body (1). The two adjacent material spreading rollers (7) in the front and back are respectively used to apply a force to the material pile to spread it to both sides of the conveying chain plate (2) and to gather it towards the central axis of the conveying chain plate (2).

5. The horizontal heat-carbon co-production furnace based on agricultural and forestry waste according to claim 3, wherein, The material spreading roller (7) includes a plurality of roller body modules (701) detachably assembled in sequence along the axial direction.

6. The horizontal heat-carbon co-production furnace based on agricultural and forestry waste according to claim 3, characterized in that, The interior of the material spreading roller (7) is hollow and is used to connect to a gas supply unit. The surface of the material spreading roller (7) has a second air supply port (702). The second air supply port (702) is used to convey the air required for combustion to the material pile.

7. The horizontal thermal-carbon co-production furnace based on agricultural and forestry waste according to claim 6, wherein The surface of the material spreading roller (7) has a plurality of mounting holes (703). The material spreading teeth (8) are slidably arranged in the mounting holes (703). A spring (9) is connected between the material spreading teeth (8) and the inner wall of the material spreading roller (7). The spring (9) is used to provide a force for the material spreading teeth (8) to approach the axis of the material spreading roller (7). A support inner cylinder (10) is slidably arranged along the axial direction in the material spreading roller (7). The end of the support inner cylinder (10) has a guiding conical surface (1001). The support inner cylinder (10) can support the material spreading teeth (8) outward so that the material spreading teeth (8) protrude out of the mounting holes (703).

8. The horizontal thermal-carbon co-production furnace based on agricultural and forestry waste according to claim 1, characterized in that, A material guide plate (11) is provided in the furnace body (1), and the material guide plate (11) is located below the material inlet (101) and extends obliquely downward toward a side close to the conveying chain plate (2), and is used to guide the material in the material inlet (101) to fall onto the conveying chain plate (2).

9. The horizontal heat-carbon co-production furnace based on agricultural and forestry waste according to claim 1, characterized in that, A downwardly extending baffle (12) is provided in the furnace body (1); the baffle (12) is located above the conveying chain plate (2) and is used to limit the height of the material pile.

10. A horizontal heat-carbon co-production furnace based on agricultural and forestry waste according to claim 5, characterized in that, Adjacent roller modules (701) are connected by means of flanges.

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