Bidirectional dividing wall type carbonization equipment for biomass

Abstract

The bidirectional dividing wall type carbonization equipment comprises an inner furnace body, an outer furnace body and a temperature measuring device, the outer furnace body is arranged outside the inner furnace body, the inner furnace body, an inner furnace body front end cover and an inner furnace body rear end cover jointly form a closed carbonization space, and a plurality of heating pipes are arranged in the inner furnace body in the radial direction; the two ends of the heating pipe penetrate through the inner furnace body through heating pipe elbows to be communicated with the interior of the outer furnace body, an inlet of the outer furnace body right faces one heating pipe elbow, an outlet of the outer furnace body right faces the other heating pipe elbow, an outer furnace body baffle is arranged in the inlet of the outer furnace body to divide an outer furnace body channel and a heating pipe channel into two independent spaces, and two independent outer furnace body adjusting plates are arranged. Industrial long-period continuous operation can be achieved, and meanwhile the problems of heat efficiency, reliability and environmental protection in traditional biomass carbonization equipment are solved.

Description

Technical Field

[0001] This invention relates to the field of biomass technology, specifically a two-way indirect carbonization device for biomass. Background Technology

[0002] Driven by the "dual carbon" goals, the utilization of biomass resources has become an important path to achieve green development. Biomass carbonization technology is a technology that converts biomass into high-value-added biochar and by-products through thermochemical transformation in an oxygen-deficient or low-oxygen environment. It has both resource recycling and ecological environmental protection value, and therefore has received widespread attention.

[0003] However, existing biomass carbonization equipment still faces many technical bottlenecks: traditional earthen kiln carbonization relies on manual experience, with a carbon yield of only about 20%, and serious black smoke emissions, resulting in poor environmental performance; in internal combustion carbonization furnaces, the raw materials are in direct contact with the flame, which not only leads to a large waste of materials, but also easily causes the carbonization temperature to run out of control, resulting in unstable product quality.

[0004] Indirect carbonization, due to its advantages of isolating raw materials from the heat source and creating a low-oxygen, precisely temperature-controlled environment, has become the industry's development direction. However, existing indirect carbonization equipment generally suffers from low heat transfer efficiency and high energy consumption, with some equipment having a thermal efficiency of less than 65%. Furthermore, uneven heating of materials within the carbonization chamber affects the consistency of biochar quality. Poor sealing performance fails to guarantee oxygen-free conditions, leading to air leakage into high-temperature carbonization equipment and posing safety risks such as explosions; leakage of high-temperature carbonized materials also poses a risk of fire. Intermittent feeding and discharging prevents continuous operation. Small processing capacity and difficulties in scaling up equipment also hinder the industrial development of biomass carbonization.

[0005] Therefore, developing a partitioned carbonization equipment that is highly efficient in heat transfer, precise in temperature control, energy-saving and environmentally friendly, and capable of continuous and stable production, to solve the pain points of existing technologies such as low thermal efficiency, high energy consumption, unstable product quality, poor equipment stability, and serious pollution, is of great practical significance for promoting the industrialization of biomass resource utilization. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a two-way indirect carbonization device for biomass, which can achieve long-term continuous industrial operation and solve the problems of thermal efficiency, reliability and environmental protection in traditional biomass carbonization equipment.

[0007] To achieve the above objectives, the present invention provides a bidirectional indirect carbonization device for biomass, comprising an inner furnace body, an outer furnace body, and a temperature measuring device. The outer furnace body is disposed outside the inner furnace body, and the inner and outer furnace bodies are coaxial. The two ends of the outer furnace body are sealed to the inner furnace body by axial dynamic and static sealing devices. Roller support devices are installed under the inner furnace body at both ends of the outer furnace body. A motor gear drive device drives the inner furnace body to rotate within the outer furnace body via gears and a gear ring fitted on the inner furnace body. An inner furnace body front cover and an inner furnace body rear cover are fixedly installed at both ends of the inner furnace body, forming a sealed carbonization space. Several heating tubes are radially arranged inside the inner furnace body, with heating tube elbows at both ends. The inner furnace body connects to the outer furnace body. The inlet of the outer furnace body faces one heating pipe bend, and the outlet of the outer furnace body faces another heating pipe bend. An outer furnace body baffle is installed inside the inlet of the outer furnace body to divide the outer furnace body channel and the heating pipe channel into two independent spaces. Two independent outer furnace body adjustment plates are also installed. The outer furnace body adjustment plates can adjust the ratio of heating medium passing through the two channels. When the heating medium passes through the inlet of the outer furnace body, it is divided into two parts according to a certain ratio and enters the outer furnace body channel and the heating pipe respectively, thereby realizing bidirectional heating and carbonization of biomass materials in the furnace. The center hole of the front end cover of the inner furnace body is equipped with an integrated feeding and gas guiding device through a radial dynamic and static sealing device, and the center hole of the rear end cover of the inner furnace body is equipped with an upper discharge device through a radial dynamic and static sealing device.

[0008] In addition, the bidirectional indirect carbonization device for biomass proposed in the above embodiments of the present invention may also have the following additional technical features: As a further improvement of the present invention, the spacing between adjacent heating tubes inside the inner furnace body is not less than 200mm; a corrugated expansion joint is also provided on the heating tube; the surface of the heating tube is provided with straight fins, which, while enhancing heat transfer, also act as a material lifting plate, which is conducive to uniform heating of the material and prevents material jamming.

[0009] As a further improvement of the present invention, the inner furnace body is arranged in a horizontal inclined manner, and the inclination angle of the inner furnace body is determined according to the rotation speed and residence time. Straight fins of the inner furnace body are provided on the outer wall of the inner furnace body to turbulent the heating medium, thereby enhancing the heat transfer effect.

[0010] As a further improvement of the present invention, a number of inner furnace body material lifting plates are installed at equal intervals on the inner side of the inner furnace body rear end cover.

[0011] As a further improvement of the present invention, the upper discharge device includes an upper discharge device housing, an upper discharge device spiral component, an upper discharge device housing notch, an upper discharge port, an upper discharge device cover, and a lower discharge port. The upper discharge device spiral component is coaxially installed inside the upper discharge device housing. An upper discharge device housing notch is formed on the upper surface of one end of the upper discharge device housing located inside the inner furnace body, and an upper discharge port is formed near the other end of the upper discharge device housing. During the rotation of the inner furnace body, the inner furnace body lifting plates, which rotate together, lift the material from the bottom of the inner furnace body and move it to a certain position. At a fixed height, the material falls into the upper discharge device housing through the notch due to gravity. Then, the upper discharge device is conveyed to the upper discharge port end of the upper discharge device by the motor-driven upper discharge device spiral component. The upper discharge port of the upper discharge device is equipped with an upper discharge device cover. The upper part of the upper discharge device cover is closed, and the lower part has an upper discharge port. The material is squeezed in the upper discharge device housing and accumulates to a certain height before being discharged into the upper discharge device cover through the upper discharge port and then discharged from the lower discharge port of the upper discharge device cover.

[0012] As a further improvement of the present invention, the integrated feeding and gas guiding device includes a small cylinder, a spiral component, and a large cylinder. The rear end of the small cylinder is connected to the lower front end of the large cylinder. The small cylinder houses the spiral component, driven by a motor, which extends into the large cylinder. The cross-sections of the large and small cylinders are circular, allowing material to be pushed into the inner furnace. The upper large cylinder serves as a gas guiding channel, through which the reaction gases generated during carbonization are discharged and enter the post-processing system. Dust in the gas phase falls into the lower small cylinder during the gas guiding process and is then pushed back into the inner furnace by the spiral component, thus preventing dust accumulation and blockage in the gas guiding channel.

[0013] As a further improvement of the present invention, a temperature measuring device is provided at one end of the inner furnace body.

[0014] As a further improvement of the present invention, the temperature measuring device includes a temperature measuring device protection tube, a temperature measuring device thermocouple, and a temperature measuring device wireless temperature transmitter. The temperature measuring device wireless temperature transmitter is fixedly installed on the outside of the rear end cover of the inner furnace body via a bracket. The temperature measuring device wireless temperature transmitter is connected to the temperature measuring device thermocouple with the temperature measuring device protection tube. The temperature measuring device thermocouple is installed inside the inner furnace body and is used to monitor the material temperature, gas phase temperature, and furnace wall temperature at appropriate locations inside the inner furnace body. The temperature measuring device thermocouple is connected to the temperature measuring device wireless temperature transmitter located outside the rear end cover of the inner furnace body. Both the temperature measuring device thermocouple and the temperature measuring device wireless temperature transmitter rotate together with the inner furnace body. The temperature data measured by the temperature measuring device thermocouple is wirelessly transmitted to the control system by the temperature measuring device wireless temperature transmitter.

[0015] As a further improvement of the present invention, the radial dynamic and static sealing device includes a radial dynamic and static sealing device dynamic sealing plate. The radial dynamic and static sealing device dynamic sealing plate is fixedly installed on the front end cover or rear end cover of the inner furnace body and rotates together with the inner furnace body. The dynamic and static sealing device static sealing plate is fixed to the feeding and air guiding integrated device or the upper discharge device through the radial dynamic and static sealing device expansion joint and remains stationary. The dynamic and static sealing device static sealing plate is pressed by the radial dynamic and static sealing device pressing device and is always in contact with the radial dynamic and static sealing device dynamic sealing plate to form a dynamic and static seal.

[0016] By means of the above-described solution, the present invention has at least the following advantages: (1) The inner furnace body 2 of the present invention is a horizontal rotary device. The device has a simple structure, reliable technology, and wide material flow channel, which can solve the problem of poor flowability of solid materials, avoid the occurrence of blockage and jamming, and ensure the long-term operation of the equipment.

[0017] (2) The present invention adopts a partition structure, and the high-temperature heating medium is indirectly heated with the material. The high-temperature heating medium is not mixed with the exhaust gas, which reduces the amount of exhaust gas to be treated. The heating medium after heat exchange can be recycled again, which reduces heat loss.

[0018] (3) The present invention adopts a bidirectional heating structure, which has high thermal efficiency and large heat exchange area per unit volume, thus solving the problems of small processing capacity and difficulty in scaling up the equipment in traditional equipment.

[0019] (4) The integrated feeding and air guiding device is adopted, which avoids the clogging of traditional air guiding devices and improves the reliability of the equipment.

[0020] (5) The use of an upper discharge device solves the problem that the traditional discharge screw cannot control the material density and avoids the situation where oxygen leaks into the furnace through the discharge channel.

[0021] (6) The use of wireless temperature measuring device can accurately measure the temperature of materials in each section of the pyrolysis furnace, and can be combined with DCS system to realize interlock control of heating medium supply, improve the quality of roasted materials and reduce sulfuric acid decomposition loss.

[0022] (7) A special dynamic and static sealing structure is adopted. This sealing structure is simple and can adapt to the radial runout of the rotating furnace body and the thermal expansion of the furnace body. It has a good sealing effect and is environmentally friendly. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 AA section view; Figure 3 for Figure 1 BB cross-section; Figure 4 This is a schematic diagram of the upper discharge device of the present invention; Figure 5 for Figure 4 The C-direction view; Figure 6 for Figure 4 DD cross-section; Figure 7 This is a schematic diagram of the radial dynamic and static sealing device of the present invention; Figure 8 This is a schematic diagram of the installation structure of the temperature measuring device of the present invention; In the diagram: 1. Integrated feeding and air guiding device; 11. Small cylinder of integrated feeding and air guiding device; 12. Spiral component of integrated feeding and air guiding device; 13. Large cylinder of integrated feeding and air guiding device; 2. Inner furnace body; 21. Front cover of inner furnace body; 22. Rear cover of inner furnace body; 23. Straight fins of inner furnace body; 24. Material lifting plate of inner furnace body; 3. Outer furnace body; 31. Inlet of outer furnace body; 32. Adjusting plate of outer furnace body; 33. Baffle of outer furnace body; 34. Outer furnace body outlet; 4. Heating tube; 41. Heating tube elbow; 42. Corrugated expansion joint of heating tube; 43. Straight fins of heating tube; 5. Temperature measuring device; 51. Protective tube of temperature measuring device; 52. Temperature measuring... 53. Thermocouple of the device; 6. Wireless temperature transmitter of the temperature measuring device; 7. Upper discharge device; 8. Upper discharge device housing; 9. Spiral component of the upper discharge device; 10. Notch of the upper discharge device housing; 11. Upper discharge port of the upper discharge device; 12. Cover of the upper discharge device; 13. Lower discharge port of the upper discharge device; 14. Roller support device; 15. Axial dynamic and static sealing device; 16. Motor gear drive device; 17. Radial dynamic and static sealing device; 18. Dynamic sealing plate of the radial dynamic and static sealing device; 19. Static sealing plate of the dynamic and static sealing device; 100. Expansion joint of the radial dynamic and static sealing device; 101. Tightening device of the radial dynamic and static sealing device. Detailed Implementation

[0024] The following description, in conjunction with the accompanying drawings, describes a bidirectional indirect carbonization device for biomass according to the present invention.

[0025] In Embodiment 1 of this application, as Figure 1 and Figure 2 As shown, this invention is a bidirectional indirect carbonization device for biomass (hereinafter referred to as "the invention"), comprising an inner furnace body 2, an outer furnace body 3, and a temperature measuring device 5. The outer furnace body 3 is disposed outside the inner furnace body 2. The inner furnace body 2 and the outer furnace body 3 are coaxial. The two ends of the outer furnace body 3 are sealed to the inner furnace body (2) by an axial dynamic and static sealing device 8. Roller support devices 7 are disposed under the inner furnace body 2 at both ends of the outer furnace body 3. A motor gear drive device 9 drives the inner furnace body 2 to rotate in the outer furnace body 3 through gears and a gear ring fitted on the inner furnace body 2. The inner furnace body 2 has a front end cover 21 and a rear end cover 22 fixedly installed at both ends. The inner furnace body 2, the front end cover 21, and the rear end cover 22 together form a sealed carbonization space. Several heating pipes 4 are radially arranged inside the inner furnace body 2. The two ends of the heating pipes 4 are connected by heating pipe elbows 4. 1. The inner furnace body 2 connects to the outer furnace body 3. The outer furnace body inlet 31 is directly opposite a heating pipe bend 41, and the outer furnace body outlet 34 is directly opposite another heating pipe bend 41. An outer furnace body baffle 33 is set inside the outer furnace body inlet 31 to divide the outer furnace body 3 channel and the heating pipe 4 channel into two independent spaces. Two independent outer furnace body adjustment plates 32 are also set. The outer furnace body adjustment plates 32 can adjust the ratio of heating medium passing through the two channels. When the heating medium passes through the outer furnace body inlet 31, it is divided into two parts according to a certain ratio and enters the outer furnace body 3 channel and the heating pipe 4 respectively, thereby realizing bidirectional heating and carbonization of biomass materials in the furnace. The central hole of the inner furnace body front end cover 21 is equipped with a feeding and gas guiding integrated device 1 through a radial dynamic and static sealing device 10. The central hole of the inner furnace body rear end cover 22 is equipped with an upper discharge device 6 through a radial dynamic and static sealing device 10. The spacing between adjacent heating tubes 4 inside the inner furnace body 2 is not less than 200mm. To prevent thermal stress caused by temperature difference between the heating tubes 4 and the inner furnace body 2, corrugated expansion joints 42 are also provided on the heating tubes 4. Straight fins 43 are provided on the surface of the heating tubes 4. These straight fins 43 enhance heat transfer and act as material lifting plates, promoting uniform heating of the material and preventing material jamming. The inner furnace body 2 is horizontally inclined, with the inclination angle determined by the rotational speed and residence time. Straight fins 23 are provided on the outer wall of the inner furnace body 2 to turbulent the heating medium, thereby enhancing heat transfer. One or more outer furnace body inlets 31 and outlets 34 can be provided on the outer furnace body 3 according to heat transfer calculation requirements. The outer furnace body 3 can adopt an external insulation structure or an internal insulation structure. The outer furnace body inlet 31 and outlet 34 can be connected to a dedicated boiler and heat recovery equipment.

[0026] like Figures 4 to 6 As shown, several inner furnace body lifting plates 24 are installed at equal intervals on the inner side of the inner furnace body 2's rear end cover 22. The upper discharge device 6 includes an upper discharge device housing 61, an upper discharge device spiral component 62, an upper discharge device housing notch 63, an upper discharge port 64, an upper discharge device cover 65, and an upper discharge port 66. The upper discharge device spiral component 62 is coaxially installed inside the upper discharge device housing 61. An upper discharge device housing notch 63 is opened on the upper surface of one end of the upper discharge device housing 61 located inside the inner furnace body 2, and an upper discharge port 64 is opened near the other end of the upper discharge device housing 61. During the rotation of the inner furnace body 2, the rotating inner furnace body lifting plates 24 lift the material from the bottom of the inner furnace body 2. When the material reaches a certain height, the material... Due to gravity, the material falls through the notch 63 of the upper discharge device housing into the upper discharge device housing 61 of the upper discharge device 6. Then, the upper discharge device spiral component 62 driven by the motor transports the material to the upper discharge port 64 of the upper discharge device 6. The upper discharge port 64 is equipped with an upper discharge device cover 65. The upper part of the upper discharge device cover 65 is closed, and the lower part has an upper discharge port 66. The material is squeezed in the upper discharge device housing 61 and accumulates to a certain height before being discharged through the upper discharge port 64 into the upper discharge device cover 65 and discharged through the upper discharge port 66 of the upper discharge device cover 65.

[0027] like Figure 3 As shown, the integrated feeding and gas guiding device 1 includes a small cylindrical feeding and gas guiding device 11, a spiral component 12, and a large cylindrical feeding and gas guiding device 13. The rear end of the small cylindrical feeding and gas guiding device 11 is connected to the lower front end of the large cylindrical feeding and gas guiding device 13. The small cylindrical feeding and gas guiding device 11 houses the spiral component 12, which is driven by a motor. The spiral component 12 extends into the large cylindrical feeding and gas guiding device 13. The cross-sections of the large cylindrical feeding and gas guiding device 13 and the small cylindrical feeding and gas guiding device 11, which are arranged vertically, are circular with large and small diameters, which can push the material into the inner furnace body 2. The upper large cylindrical feeding and gas guiding device 13 serves as a gas guiding channel, through which the reaction gases generated during the carbonization process are discharged and enter the post-processing system. During the gas guiding process, dust in the gas phase falls into the small cylinder 11 of the lower integrated feeding and gas guiding device, and is then pushed back into the inner furnace body 2 by the spiral component 12 of the integrated feeding and gas guiding device, thereby preventing dust accumulation and blockage in the gas guiding channel. The small cylinder 11 of the integrated feeding and gas guiding device is equipped with a feed inlet.

[0028] To further optimize the efficiency of this application, such as Figure 1 and Figure 8As shown, a temperature measuring device 5 is installed at one end of the inner furnace body 2. The temperature measuring device 5 includes a temperature measuring device protection tube 51, a temperature measuring device thermocouple 52, and a temperature measuring device wireless temperature transmitter 53. The temperature measuring device wireless temperature transmitter 53 is fixedly installed on the outside of the rear end cover 22 of the inner furnace body via a bracket. The temperature measuring device wireless temperature transmitter 53 is connected to the temperature measuring device thermocouple 52 with the temperature measuring device protection tube 51. The temperature measuring device thermocouple 52 is installed inside the inner furnace body 2 and is used to monitor the material temperature, gas phase temperature, and furnace wall temperature at appropriate locations inside the inner furnace body 2. The temperature measuring device thermocouple 52 is connected to the temperature measuring device wireless temperature transmitter 53 located outside the rear end cover 22 of the inner furnace body. Both the temperature measuring device thermocouple 52 and the temperature measuring device wireless temperature transmitter 53 rotate together with the inner furnace body 2. The temperature data measured by the temperature measuring device thermocouple 52 is wirelessly transmitted to the control system by the temperature measuring device wireless temperature transmitter 53.

[0029] like Figure 7 As shown, the radial dynamic and static sealing device 10 includes a radial dynamic and static sealing device dynamic sealing plate 101. The radial dynamic and static sealing device dynamic sealing plate 101 is fixedly installed on the inner furnace body 2 front end cover 21 or rear end cover 22 of the inner furnace body 2, and rotates together with the inner furnace body 2. The dynamic and static sealing device static sealing plate 102 is fixed to the feeding and air guiding integrated device 1 or the upper discharge device 6 through the radial dynamic and static sealing device expansion joint 103 and remains stationary. The dynamic and static sealing device static sealing plate 102 is pressed by the radial dynamic and static sealing device pressing device 104 and is always in contact with the radial dynamic and static sealing device dynamic sealing plate 101 to form a dynamic and static seal. The radial dynamic and static sealing device dynamic sealing plate 101 is fixed to the outer side of the inner furnace body 2 at both ends of the inner furnace body 2 at the front end cover 21 and the rear end cover 22 of the inner furnace body. The dynamic and static sealing device static sealing plate 102 installed on the feeding and air guiding integrated device 1 or the upper discharge device 6 is fixed by the radial dynamic and static sealing device expansion joint 103. The radial dynamic and static sealing device tightening device 104 tightens the dynamic and static sealing device static sealing plate 102 against the radial dynamic and static sealing device dynamic sealing plate 101.

[0030] When in use, this invention works as follows: In use, the motor of the gear drive device 9 drives the inner furnace body 2 to rotate within the roller support device 7 and the outer furnace body 3 via a reducer, transmission shaft, and gear ring mounted on the inner furnace body 2. The material first enters the small cylinder 11 of the integrated feeding and gas guiding device 1 through the feed inlet. Then, under the action of the spiral component 12, it is pushed into the large cylinder 13 of the integrated feeding and gas guiding device, and enters the inner furnace body 2 through the opening on the lower rear surface of the large cylinder 13. As the inner furnace body 2 continues to roll, the material gradually moves upwards to one end of the discharge device 6 under the pressure of gravity and the pushing action of other materials. During the process, the external heating medium enters the outer furnace body 3 through the outer furnace body inlet 31. The outer furnace body inlet 31 is equipped with an outer furnace body baffle 33 to divide the outer furnace body 3 channel and the heating pipe 4 channel into two independent spaces. Two independent outer furnace body adjustment plates 32 are also provided. The outer furnace body adjustment plates 32 can adjust the ratio of heating medium passing through the two channels. When the heating medium passes through the outer furnace body inlet 31, it is divided into two parts according to a certain ratio and enters the outer furnace body 3 channel and the heating pipe 4 respectively, thereby realizing bidirectional heating and carbonization of biomass materials in the furnace. After passing through the outer furnace body 3 channel and the heating pipe 4 channel, the heating medium is discharged through the outer furnace body outlet 34 and recycled by the heating equipment. After passing through the outer furnace body 3 channel and the heating pipe 4 channel, the material arrives at the rear end of the inner furnace body 2. As the inner furnace body 2 rotates, the inner furnace body lifting plate 24, which rotates together, lifts the material from the bottom of the inner furnace body 2. When it reaches a certain height, the material falls into the upper discharge device housing 61 of the upper discharge device 6 through the upper discharge device housing notch 63 due to gravity. Then, the upper discharge device spiral component 62 driven by the motor transports the material to the upper discharge port 64 at the other end of the upper discharge device 6. The material is squeezed in the upper discharge device housing 61 and accumulates to a certain height before being discharged through the upper discharge port 64 into the upper discharge device cover 65 and discharged from the lower discharge port 66 of the upper discharge device cover 65.

[0031] In summary, the bidirectional indirect-wall carbonization equipment for biomass of this invention, through the combination of an inner furnace body 2 with a certain tilt angle and rotation, and an outer furnace body 3 with external heating, along with a wide material flow channel, solves the problem of poor flowability of solid materials, avoids material blockage and jamming, and ensures long-term operation of the equipment. The indirect-wall structure allows for indirect heating between the high-temperature heating medium and the material, preventing the high-temperature heating medium from mixing with the exhaust gas, thus reducing the amount of exhaust gas to be processed. The heating medium after heat exchange can be recycled, reducing heat loss. The bidirectional heating structure of the outer furnace body 3 channel and the heating pipe 4 channel results in high thermal efficiency and a large heat exchange area per unit volume, solving the problems of small processing capacity and difficulty in scaling up traditional equipment. The specially designed integrated feeding and gas guiding device 1 avoids the clogging issues common in traditional gas guiding devices, improving equipment reliability. The upper discharge device 6 solves the problem of traditional discharge screws being unable to control material density, preventing oxygen from leaking into the furnace through the discharge channel. The use of a wireless temperature transmitter 53 enables accurate measurement of the temperature of materials in different sections of the pyrolysis furnace. Combined with a DCS system, it allows for interlocking control of the heating medium supply, improving the quality of the roasted materials and reducing sulfuric acid decomposition losses. A special radial dynamic and static sealing device 10 is employed. This sealing structure is simple and can adapt to the radial runout of the rotating furnace body and the thermal expansion of the furnace body, providing excellent sealing performance and being environmentally friendly.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A two-way indirect carbonization device for biomass, comprising an inner furnace body (2), an outer furnace body (3), and a temperature measuring device (5), wherein the outer furnace body (3) is disposed outside the inner furnace body (2), characterized in that, The inner furnace body (2) and the outer furnace body (3) are coaxial. The two ends of the outer furnace body (3) are sealed to the inner furnace body (2) by an axial dynamic and static sealing device (8). Roller support devices (7) are set under the inner furnace body (2) at both ends of the outer furnace body (3). The motor gear drive device (9) drives the inner furnace body (2) to rotate in the outer furnace body (3) through gears and gear rings fitted on the inner furnace body (2). The inner furnace body (2) has a front end cover (21) and a rear end cover (22) fixedly installed at both ends. The inner furnace body (2), the front end cover (21) and the rear end cover (22) together form a closed carbonization space. Several heating tubes (4) are radially arranged inside the inner furnace body (2) to heat The two ends of the pipe (4) pass through the inner furnace body (2) and connect to the outer furnace body (3) through the heating pipe elbow (41). The outer furnace body inlet (31) is directly opposite one heating pipe elbow (41), and the outer furnace body outlet (34) is directly opposite another heating pipe elbow (41). An outer furnace body baffle (33) is set inside the outer furnace body inlet (31) to divide the outer furnace body (3) channel and the heating pipe (4) channel into two independent spaces, and two independent outer furnace body adjustment plates (32) are set. The center hole of the inner furnace body front end cover (21) is fitted with a feeding and air guiding integrated device (1) through a radial dynamic and static sealing device (10), and the center hole of the inner furnace body rear end cover (22) is fitted with an upper discharge device (6) through a radial dynamic and static sealing device (10).

2. The bidirectional indirect carbonization equipment for biomass according to claim 1, characterized in that, The distance between adjacent heating tubes (4) inside the inner furnace body (2) is not less than 200mm; a corrugated expansion joint (42) is also provided on the heating tube (4); and straight fins (43) are provided on the surface of the heating tube (4).

3. The bidirectional indirect carbonization equipment for biomass according to claim 2, characterized in that, The inner furnace body (2) is arranged in a horizontal inclined manner.

4. A two-way indirect carbonization device for biomass according to claim 3, characterized in that, Several inner furnace body lifting plates (24) are installed at equal intervals on the inner side of the inner furnace body (2) rear end cover (22).

5. A two-way indirect carbonization device for biomass according to claim 1, characterized in that, The upper discharge device (6) includes an upper discharge device housing (61) and an upper discharge device lower outlet (66). The upper discharge device spiral component (62) is coaxially installed inside the upper discharge device housing (61). An upper discharge device housing notch (63) is opened on the upper surface of one end of the upper discharge device housing (61) located inside the inner furnace body (2). An upper discharge device upper outlet (64) is opened near the other end of the upper discharge device housing (61). The upper discharge device upper outlet (64) is equipped with an upper discharge device cover (65). The upper part of the upper discharge device cover (65) is closed, and the lower part of the upper discharge device lower outlet (66) is opened at the bottom.

6. A two-way indirect carbonization device for biomass according to claim 5, characterized in that, The integrated feeding and air guiding device (1) includes a small cylinder (11), a spiral component (12), and a large cylinder (13). The rear end of the small cylinder (11) is connected to the lower front end of the large cylinder (13). The small cylinder (11) is equipped with a spiral component (12) driven by a motor. The spiral component (12) extends into the large cylinder (13). The large cylinder (13) and the small cylinder (11) are arranged vertically and vertically, and their cross-sections are large and small circles.

7. A two-way indirect carbonization device for biomass according to claim 1, characterized in that, A temperature measuring device (5) is installed at one end of the inner furnace body (2).

8. A two-way indirect carbonization device for biomass according to claim 7, characterized in that, The temperature measuring device (5) includes a temperature measuring device protection tube (51), a temperature measuring device thermocouple (52), and a temperature measuring device wireless temperature transmitter (53). The temperature measuring device wireless temperature transmitter (53) is fixedly installed on the outside of the rear end cover (22) of the inner furnace body through a bracket. The temperature measuring device wireless temperature transmitter (53) is connected to the temperature measuring device thermocouple (52) with the temperature measuring device protection tube (51). The temperature measuring device thermocouple (52) is installed inside the inner furnace body (2).

9. A two-way indirect carbonization device for biomass according to claim 1, characterized in that, The radial dynamic and static sealing device (10) includes a radial dynamic and static sealing device dynamic sealing plate (101). The radial dynamic and static sealing device dynamic sealing plate (101) is fixedly installed on the inner furnace body (2) front end cover (21) or rear end cover (22) of the inner furnace body (2) and rotates together with the inner furnace body (2). The dynamic and static sealing device static sealing plate (102) is fixed to the feed and air guiding integrated device (1) or the upper discharge device (6) through the radial dynamic and static sealing device expansion joint (103) and remains stationary. The dynamic and static sealing device static sealing plate (102) is pressed by the radial dynamic and static sealing device pressing device (104) and is always in contact with the radial dynamic and static sealing device dynamic sealing plate (101).

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