High efficiency rotating bed coal pyrolysis device

Abstract

The utility model discloses a kind of high-efficiency rotary bed coal pyrolysis devices.The device includes feeding mechanism, first low-temperature pyrolysis mechanism, second low-temperature pyrolysis mechanism and heat supply mechanism, heat supply mechanism includes the heat supply box that can generate heat, first heat supply pipe and second heat supply pipe, wherein first low-temperature pyrolysis mechanism and second low-temperature pyrolysis mechanism are fixed at the upper and lower ends of heat supply mechanism respectively.Each low-temperature pyrolysis mechanism includes heat-insulating shell, heat-insulating inner cylinder, intelligent grate, circulating flue and flue gas pipeline, and the inner part of heat-insulating inner cylinder is separated into upper pyrolysis cavity and lower pyrolysis cavity by intelligent grate, and material transfer can be realized by turning over.Feeding mechanism can feed two pyrolysis mechanisms simultaneously by shunt design.Heat supply mechanism uses upper and lower double-way heat supply pipe, and heat is transported to two pyrolysis mechanisms.The utility model realizes the efficient pyrolysis and energy cascade utilization of low-rank coal by double-layer pyrolysis, flue gas circulation and intelligent material control, and significantly improves pyrolysis efficiency and heat energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of energy conversion technology, specifically to a high-efficiency rotating bed coal pyrolysis device. Background Technology

[0002] In recent years, with the development of clean and efficient coal utilization technologies, it is imperative to shift coal from being primarily a fuel to a resource that serves as both fuel and feedstock. Coal-based polygeneration technologies using coal as a raw material have essentially formed two main technical routes: one is the coal gasification polygeneration process route, and the other is the low-temperature coal pyrolysis polygeneration process route. For low-rank coal, its degree of coalification is low, its volatile matter is high, and its direct combustion or gasification efficiency is low. However, its organic matter chemical structure contains many side chains, and its organic matter elemental composition has a high hydrogen and oxygen content. Therefore, it can be obtained through pyrolysis with minimal energy and material consumption (meaning low investment and low operating costs) to produce the necessary clean energy and chemicals. To obtain high-yield coal tar and high-calorific-value gas, low-rank coal is mostly treated with low-temperature pyrolysis. Through medium- and low-temperature pyrolysis, low-rank coal is graded and upgraded, achieving cascade utilization. This effectively reduces emissions of sulfur dioxide, nitrogen oxides, and dust during the combustion of low-rank coal. Simultaneously, it can separate some oil and gas, which have higher economic value and are relatively scarce resources, improving the efficiency of coal resource utilization and reducing my country's dependence on imported oil and gas.

[0003] Rotary bed coal pyrolysis equipment is a commonly used device for low-temperature pyrolysis of low-rank coal. Current rotary bed coal pyrolysis equipment, such as Shenwu rotary bed, can only perform low-temperature pyrolysis on a single layer of material, and the low-temperature pyrolysis efficiency needs to be improved. At the same time, the overall heat utilization rate is not high. In order to improve the low-temperature pyrolysis efficiency and increase the heat utilization rate, we propose a high-efficiency rotary bed coal pyrolysis device. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency rotating bed coal pyrolysis device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency rotating bed coal pyrolysis device, comprising a feeding mechanism, a first low-temperature pyrolysis mechanism, a second low-temperature pyrolysis mechanism, and a heating mechanism, wherein the first low-temperature pyrolysis mechanism and the second low-temperature pyrolysis mechanism are respectively fixedly connected to the upper and lower ends of the heating mechanism; Both the first and second low-temperature pyrolysis mechanisms include an insulating outer shell, an insulating inner cylinder, a slag discharge channel, an inner flue pipe, an outer flue pipe, and an inlet pipe. The insulating inner cylinder is fixedly installed inside the insulating outer shell, and a circulating flue is formed between the insulating inner cylinder and the insulating outer shell. A smart grate is rotatably connected to the middle of the inner wall of the insulating inner cylinder via a drive mechanism. The smart grate divides the interior of the insulating inner cylinder into an upper pyrolysis chamber and a lower pyrolysis chamber. The smart grate can be flipped to transfer the material in the upper pyrolysis chamber to the lower pyrolysis chamber. One end of the slag discharge channel is connected to the lower pyrolysis chamber, and the other end of the slag discharge channel extends to the outside of the insulation shell. One end of the inner flue pipe is connected to the top of the upper pyrolysis chamber, and the other end of the inner flue pipe is connected to the circulating flue. One end of the flue pipe is connected to the circulating flue, and the other end of the flue pipe is connected to the lower pyrolysis chamber. The outer flue pipe is fixedly connected to the outside of the insulation shell and is connected to the circulating flue. The bottom of the inner insulation cylinder is a slope that is higher on the left and lower on the right, and the lowest point of the slope is aligned with the inlet of the slag discharge channel. The feeding mechanism includes two controllable discharge ports, which respectively extend into the upper pyrolysis chambers of the first low-temperature pyrolysis mechanism and the second low-temperature pyrolysis mechanism. The heating mechanism includes a heating box capable of generating heat, a first heating pipe, and a second heating pipe. One end of the first heating pipe is connected to the upper part of the heating box, and the other end of the first heating pipe is connected to the lower pyrolysis chamber of the first low-temperature pyrolysis mechanism. One end of the second heating pipe is connected to the lower part of the heating box, and the other end of the second heating pipe is connected to the lower pyrolysis chamber of the second low-temperature pyrolysis mechanism.

[0006] Preferably, the heating machinery further includes a combustion furnace head and a fuel pipeline. The fuel pipeline is connected to the combustion furnace head and is used to supply fuel to the combustion furnace head. The combustion furnace head is fixedly installed in the middle of the interior of the heating box, and both the upper and lower surfaces of the combustion furnace head can burn.

[0007] Preferably, the feeding mechanism further includes a feeding hopper, a herringbone pipe, and two solenoid valves. The feeding hopper is fixedly mounted on the bracket, the herringbone pipe is fixedly connected to the lower end of the feeding hopper, the two discharge ports are located at the lower ends of the herringbone pipe, and the solenoid valves are mounted on the herringbone pipe and located at the fork of the herringbone pipe.

[0008] Preferably, the feeding hopper is provided with a feeding assembly, which includes a support beam, a first servo motor and a spiral feeding rod. The support beam is fixedly connected to the middle of the inner wall of the feeding hopper, the first servo motor is fixedly connected to the surface of the support beam, and the spiral feeding rod extends to the inlet of the herringbone tube and is drivenly connected to the first servo motor.

[0009] Preferably, a material rake is fixedly connected to the inner wall of the heat-insulating inner cylinder, and the length of the material rake is equal to the radius of the intelligent grate.

[0010] Preferably, the intelligent grate includes a movable ring, a middle heat-insulating pipe, multiple second servo motors, and multiple material racks. The movable ring is rotatably connected to the inner wall of the heat-insulating inner cylinder. The middle heat-insulating pipe is disposed between the inner walls on both sides of the movable ring. The multiple second servo motors are fixedly connected to both sides of the inner wall of the middle heat-insulating pipe. One end of the material rack is drivenly connected to the output end of the second servo motor, and the other end of the material rack extends to the inner side of the movable ring.

[0011] Preferably, the driving mechanism includes a third servo motor, a transmission rod, and a heat insulation ring. The heat insulation ring is fixedly connected between the bottom of the insulation outer shell and the bottom of the insulation inner cylinder. The third servo motor is fixedly connected to the bottom of the insulation outer shell and located inside the heat insulation ring. One end of the transmission rod is connected to the third servo motor, and the other end of the transmission rod passes through the bottom of the insulation inner cylinder and is fixedly connected to the intermediate heat insulation pipe.

[0012] Preferably, a hinge plate is fixed to the surface of the transmission rod, and a pusher plate is rotatably connected to the surface of the hinge plate.

[0013] Preferably, there are multiple first heating pipes and multiple second heating pipes, which are arranged in a ring array around the heating box.

[0014] Beneficial effects This utility model provides a high-efficiency rotating bed coal pyrolysis device, which has the following beneficial effects: 1. This high-efficiency rotating bed coal pyrolysis device, by setting up a first low-temperature pyrolysis mechanism and a second low-temperature pyrolysis mechanism, realizes the synchronous operation of the upper and lower double-layer pyrolysis mechanisms. It can simultaneously perform two pyrolysis processes on two different materials or the same material twice, realizing the stratified and staged processing of materials, improving the processing capacity and pyrolysis thoroughness per unit time, and enhancing the pyrolysis efficiency.

[0015] 2. This high-efficiency rotating bed coal pyrolysis device forms a flue gas circulation system by setting up a circulating flue, an inner flue gas outlet pipe and a flue gas inlet pipe. The waste heat flue gas in the upper pyrolysis chamber is introduced into the circulating flue and partially recovered to the lower pyrolysis chamber for reuse. Combined with the double-layer insulation structure of the heat-insulating outer shell and the heat-insulating inner cylinder, heat loss is effectively reduced and heat energy is utilized in stages.

[0016] 3. This high-efficiency rotating bed coal pyrolysis device features an intelligent grate that can be tilted for unloading. It is driven by a third servo motor to rotate the intelligent grate and a material rake to level the material, achieving automatic material transfer and uniform heating. The feeding mechanism is equipped with a solenoid valve and a screw feeder, which can achieve continuous and controllable feeding to adapt to different coal types and process requirements. Attached Figure Description

[0017] Figure 1 This is a schematic cross-sectional view of the overall structure of a high-efficiency rotating bed coal pyrolysis device proposed in this utility model; Figure 2 This is a schematic diagram of the internal structure of the heat-insulating inner cylinder of a high-efficiency rotating bed coal pyrolysis device proposed in this utility model; Figure 3 This is a top-section structural diagram of the heating mechanism of a high-efficiency rotating bed coal pyrolysis device proposed in this utility model; Figure 4 This is a schematic diagram of the feeding mechanism of a high-efficiency rotating bed coal pyrolysis device proposed in this utility model; Figure 5 This utility model proposes a high-efficiency rotating bed coal pyrolysis device. Figure 4 Schematic diagram of the enlarged structure of A in the middle; Figure 6 This is a schematic diagram of the intelligent grate structure of a high-efficiency rotating bed coal pyrolysis device proposed in this utility model. Figure 7 This is a schematic diagram of the drive mechanism of a high-efficiency rotating bed coal pyrolysis device proposed in this utility model.

[0018] In the diagram: 1. Feeding mechanism; 2. First low-temperature pyrolysis mechanism; 3. Second low-temperature pyrolysis mechanism; 4. Heating mechanism; 5. Insulated outer shell; 6. Insulated inner cylinder; 7. Slag discharge channel; 8. Inner flue pipe; 9. Outer flue pipe; 10. Inlet flue pipe; 11. Circulating flue; 12. Drive mechanism; 13. Intelligent grate; 14. Upper pyrolysis chamber; 15. Lower pyrolysis chamber; 16. Discharge port; 17. Heating box; 18. First heating pipe; 19. 20. Second heating pipe; 21. Combustion furnace head; 22. Fuel pipe; 23. Feed hopper; 24. Herringbone pipe; 25. Solenoid valve; 26. Support beam; 27. First servo motor; 28. Spiral feed rod; 29. ​​Material rake; 30. Movable ring; 31. Intermediate heat insulation pipe; 32. Second servo motor; 33. Material rack; 34. Third servo motor; 35. Transmission rod; 36. Heat insulation ring; 37. Hinge plate; 38. Pusher plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Example 1, please refer to Figure 1-7 This utility model provides a technical solution: a high-efficiency rotating bed coal pyrolysis device, including a feeding mechanism 1, a first low-temperature pyrolysis mechanism 2, a second low-temperature pyrolysis mechanism 3 and a heating mechanism 4, wherein the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3 are respectively fixedly connected to the upper and lower ends of the heating mechanism 4. Both the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3 include an insulating outer shell 5, an insulating inner cylinder 6, a slag discharge channel 7, an inner flue pipe 8, an outer flue pipe 9, and an inlet pipe 10. The insulating inner cylinder 6 is fixedly installed inside the insulating outer shell 5, and a circulating flue 11 is formed between the insulating inner cylinder 6 and the insulating outer shell 5. The middle of the inner wall of the insulating inner cylinder 6 is rotatably connected to an intelligent grate 13 via a drive mechanism 12. The intelligent grate 13 divides the interior of the insulating inner cylinder 6 into an upper pyrolysis chamber 14 and a lower pyrolysis chamber 15. The intelligent grate 13 can be flipped to transfer the material in the upper pyrolysis chamber 14 to the lower pyrolysis chamber 15. One end of the slag discharge channel 7 is connected to the lower pyrolysis chamber 15, and the other end of the slag discharge channel 7 extends to the outside of the insulation shell 5. One end of the inner flue pipe 8 is connected to the top of the upper pyrolysis chamber 14, and the other end of the inner flue pipe 8 is connected to the circulating flue 11. One end of the inlet pipe 10 is connected to the circulating flue 11, and the other end of the inlet pipe 10 is connected to the lower pyrolysis chamber 15. The outer flue pipe 9 is fixedly connected to the outside of the insulation shell 5 and is connected to the circulating flue 11. The bottom of the inner insulation cylinder 6 is a slope that is higher on the left and lower on the right, and the lowest point of the slope is aligned with the inlet of the slag discharge channel 7. The slag discharge channel 7 is controlled by a valve. The feeding mechanism 1 includes two controllable discharge ports 16, which are respectively connected to the upper pyrolysis chambers 14 of the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3. The heating mechanism 4 includes a heating box 17 capable of generating heat, a first heating pipe 18 and a second heating pipe 19. One end of the first heating pipe 18 is connected to the upper part of the heating box 17, and the other end of the first heating pipe 18 is connected to the lower pyrolysis chamber 15 of the first low-temperature pyrolysis mechanism 2. One end of the second heating pipe 19 is connected to the lower part of the heating box 17, and the other end of the second heating pipe 19 is connected to the lower pyrolysis chamber 15 of the second low-temperature pyrolysis mechanism 3.

[0024] The heating equipment also includes a combustion furnace head 20 and a fuel pipe 21. The fuel pipe 21 is connected to the combustion furnace head 20 and is used to supply fuel to the combustion furnace head 20. The combustion furnace head 20 is fixedly installed in the middle of the interior of the heating box 17, and both the upper and lower surfaces of the combustion furnace head 20 can burn. There are multiple first heating pipes 18 and multiple second heating pipes 19, which are distributed in a ring array around the heating box 17. Fuel can be continuously supplied to the combustion furnace head 20 through the fuel pipe 21. The operation of the combustion furnace head 20 can generate high-temperature hot air in the heating box 17. Through multiple first heating pipes 18 and multiple second heating pipes 19, the heat in the heating box 17 can be easily transferred to the lower pyrolysis chamber 15 of the heat-insulating inner cylinder 6.

[0025] The feeding mechanism 1 also includes a feeding hopper 22, a herringbone pipe 23, and two solenoid valves 24. The feeding hopper 22 is fixedly mounted on a support, and the herringbone pipe 23 is fixedly connected to the lower end of the feeding hopper 22. Two discharge ports 16 are located at the lower ends of the herringbone pipe 23, respectively. The solenoid valves 24 are mounted on the herringbone pipe 23 and located at the bifurcation point of the herringbone pipe 23. By setting up the feeding mechanism 1 and using the two solenoid valves 24 to open and close the two discharge ports 16 at the lower end of the herringbone pipe 23, the two discharge ports 16 at the lower end of the herringbone pipe 23 can be controlled. This is useful when performing low-temperature pyrolysis of low-rank coal materials. The material in the feeding hopper 22 can be fed into the upper pyrolysis chamber 14 of the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3 through the herringbone pipe 23 by the solenoid valve 24. The material falls onto the surface of the intelligent grate 13. By having the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3 work simultaneously, the pyrolysis efficiency of low-rank coal can be greatly improved. Furthermore, the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3 can simultaneously perform low-temperature pyrolysis on two different types of materials, effectively expanding the applicability of the device.

[0026] The feeding hopper 22 is equipped with a feeding assembly, which includes a support beam 25, a first servo motor 26, and a spiral feeding rod 27. The support beam 25 is fixedly connected to the middle of the inner wall of the feeding hopper 22, and the first servo motor 26 is fixedly connected to the surface of the support beam 25. The spiral feeding rod 27 extends to the inlet of the herringbone pipe 23 and is connected to the first servo motor 26 for transmission. By setting up the feeding assembly, the first servo motor 26 can drive the spiral feeding rod 27 to rotate, thereby facilitating the smooth entry of materials in the feeding hopper 22 into the herringbone pipe 23, thus ensuring the continuity of material entering the herringbone pipe 23, and also realizing controllable feeding.

[0027] The intelligent grate 13 includes a movable ring 29, a middle heat-insulating pipe 30, multiple second servo motors 31, and multiple material racks 32. The movable ring 29 is rotatably connected to the inner wall of the heat-insulating inner cylinder 6. The middle heat-insulating pipe 30 is arranged between the inner walls on both sides of the movable ring 29. The multiple second servo motors 31 are fixedly connected to both sides of the inner wall of the middle heat-insulating pipe 30. One end of the material rack 32 is connected to the output end of the second servo motor 31, and the other end of the material rack 32 extends to the inner side of the movable ring 29.

[0028] After the material in the upper pyrolysis chamber 14 has completed pyrolysis, the intelligent grate 13 is set up, and the second servo motor 31 can drive the material rack 32 to rotate. By rotating the material rack 32 by 90 degrees, the material on the surface of the material rack 32 can enter the lower pyrolysis chamber 15. After the material enters the lower pyrolysis chamber 15, it can undergo low-temperature pyrolysis again, thereby realizing the secondary pyrolysis of the material, effectively improving the utilization rate of the material and avoiding material waste.

[0029] The drive mechanism 12 includes a third servo motor 33, a transmission rod 34, and a heat insulation ring 35. The heat insulation ring 35 is fixedly connected between the bottom of the insulation shell 5 and the bottom of the insulation inner cylinder 6. The third servo motor 33 is fixedly connected to the bottom of the insulation shell 5 and located inside the heat insulation ring 35. One end of the transmission rod 34 is connected to the third servo motor 33, and the other end of the transmission rod 34 passes through the bottom of the insulation inner cylinder 6 and is fixedly connected to the middle heat insulation pipe 30. Through the heat insulation ring 35, the third servo motor 33 can operate at a safe temperature. The operation of the third servo motor 33 can drive the transmission rod 34 to rotate. The rotation of the transmission rod 34 can drive the middle heat insulation pipe 30 to rotate, thereby realizing the rotation of the entire intelligent grate 13.

[0030] Example 2, see Figure 1 and Figure 2 Including Embodiment 1, and based on Embodiment 1, this utility model provides a technical solution: a material rake 28 is fixedly connected to the inner wall of the heat-insulating inner cylinder 6. The length of the material rake 28 is equal to the radius of the intelligent grate 13. By setting the material rake 28 and utilizing the rotation of the intelligent grate 13, the material can be easily spread out, which is conducive to the material being heated evenly, thereby facilitating the low-temperature pyrolysis of the material.

[0031] Example 3, see Figure 7 Including Embodiment 2, and based on Embodiment 2, this utility model provides a technical solution: the surface of the transmission rod 34 is fixed with a hinge plate 36, and the surface of the hinge plate 36 is rotatably connected to a pusher plate 37. After the material is pyrolyzed in the lower pyrolysis chamber 15, the transmission rod 34 is rotated by the third servo motor 33, which can rotate the hinge plate 36, thereby driving the pusher plate 37 to rotate. The pusher plate 37 can rotate up and down, which facilitates the contact between the pusher plate 37 and the material residue at the bottom of the lower pyrolysis chamber 15, so as to push the material residue into the slag discharge channel 7.

[0032] A pyrolysis method for a high-efficiency rotating bed coal pyrolysis device includes the following steps: S1, low-rank coal is fed into the upper pyrolysis chamber 14 of the first low-temperature pyrolysis unit 2 and the second low-temperature pyrolysis unit 3 through the feeding mechanism 1 respectively; S2, start the drive mechanism 12 to drive the intelligent grate 13 to rotate, and cooperate with the material rake 28 to spread the material; S3, the heating mechanism 4 generates high-temperature hot gas, which enters the lower pyrolysis chambers 15 of the two low-temperature pyrolysis mechanisms through the first heating pipe 18 and the second heating pipe 19 respectively. S4, the high-temperature hot gas rises and performs initial pyrolysis on the coal in the upper pyrolysis chamber 14, and the resulting oil fumes enter the circulating flue 11 through the inner smoke outlet pipe 8. S5. After the initial pyrolysis is completed, the intelligent grate 13 flips over to transfer the material to the lower pyrolysis chamber 15 for secondary pyrolysis. S6, some of the flue gas in the circulating flue 11 is recovered to the lower pyrolysis chamber 15 through the flue pipe 10 to realize the utilization of waste heat; S7. After the secondary pyrolysis is completed, the slag discharge channel 7 is opened, and the pusher plate 37 is rotated by the transmission rod 34 to discharge the residue, thus completing the pyrolysis process.

[0033] Working Principle: When this high-efficiency rotating bed coal pyrolysis device is in operation, low-rank coal material is first fed into the upper pyrolysis chamber 14 of the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3 through the feeding mechanism 1 and the two discharge ports 16 respectively. Then, the intelligent grate 13 is rotated by the drive mechanism 12, which, together with the material rake 28, facilitates the leveling of the material. Then, the combustion furnace head 20 of the heating mechanism 4 works, which allows multiple first heating pipes 18 and multiple second heating pipes 19 to transfer hot air into the lower pyrolysis chamber 15 of the first low-temperature pyrolysis mechanism 2 and the second low-temperature pyrolysis mechanism 3 respectively. After entering the lower pyrolysis chamber 15, the hot air rises and then enters the upper pyrolysis chamber 14, thereby performing the initial low-temperature pyrolysis on the material in the upper pyrolysis chamber 14. The oil fumes generated during the low-temperature pyrolysis process are discharged from the inner smoke outlet pipe 8 at the top into the circulating flue 11 and enter the circulating flue. A portion of the flue gas from flue 11 will be discharged from the outer flue pipe 9 for subsequent processing. Another portion of the flue gas entering the circulating flue 11 will enter the lower pyrolysis chamber 15 from the inlet pipe 10, thus enabling the flue gas to be recycled. This facilitates the maintenance of a stable temperature in the inner insulation cylinder 6. Combined with the outer insulation shell 5 for external insulation, double-cylinder insulation is achieved, greatly improving the heat utilization rate. After the material completes the initial low-temperature pyrolysis in the upper pyrolysis chamber 14, the material rack 32 is rotated 90 degrees by the second servo motor 31, which can flip the material into the lower pyrolysis chamber 15. After the material undergoes a second low-temperature pyrolysis in the lower pyrolysis chamber 15, the valve of the slag discharge channel 7 can be opened. Then, the transmission rod 34 is rotated by the third servo motor 33, which can make the hinge plate 36 and the pusher plate 37 rotate synchronously, so that the material slag in the lower pyrolysis chamber 15 can be discharged from the slag discharge channel 7.

[0034] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency rotating bed coal pyrolysis device, characterized in that, It includes a feeding mechanism (1), a first low-temperature pyrolysis mechanism (2), a second low-temperature pyrolysis mechanism (3), and a heating mechanism (4). The first low-temperature pyrolysis mechanism (2) and the second low-temperature pyrolysis mechanism (3) are respectively fixedly connected to the upper and lower ends of the heating mechanism (4). Both the first low-temperature pyrolysis mechanism (2) and the second low-temperature pyrolysis mechanism (3) include an insulating outer shell (5), an insulating inner cylinder (6), a slag discharge channel (7), an inner flue pipe (8), an outer flue pipe (9), and an inlet pipe (10). The insulating inner cylinder (6) is fixedly installed inside the insulating outer shell (5). A circulating flue (11) is formed between the insulating inner cylinder (6) and the insulating outer shell (5). The middle of the inner wall of the insulating inner cylinder (6) is rotatably connected to an intelligent grate (13) through a drive mechanism (12). The intelligent grate (13) divides the interior of the insulating inner cylinder (6) into an upper pyrolysis chamber (14) and a lower pyrolysis chamber (15). The intelligent grate (13) can be flipped to transfer the material in the upper pyrolysis chamber (14). The slag discharge channel (7) is connected to the lower pyrolysis chamber (15) at one end and to the outside of the insulation shell (5) at the other end. The inner flue pipe (8) is connected to the top of the upper pyrolysis chamber (14) at one end and to the circulating flue (11) at the other end. The flue pipe (10) is connected to the circulating flue (11) at one end and to the lower pyrolysis chamber (15) at the other end. The outer flue pipe (9) is fixedly connected to the outside of the insulation shell (5) and to the circulating flue (11). The bottom of the inner insulation cylinder (6) is a slope that is higher on the left and lower on the right, and the lowest point of the slope is aligned with the inlet of the slag discharge channel (7). The feeding mechanism (1) includes two controllable discharge ports (16), which are respectively connected to the upper pyrolysis chambers (14) of the first low-temperature pyrolysis mechanism (2) and the second low-temperature pyrolysis mechanism (3); The heating mechanism (4) includes a heating box (17) capable of generating heat, a first heating pipe (18) and a second heating pipe (19). One end of the first heating pipe (18) is connected to the upper part of the heating box (17), and the other end of the first heating pipe (18) is connected to the lower pyrolysis chamber (15) of the first low-temperature pyrolysis mechanism (2). One end of the second heating pipe (19) is connected to the lower part of the heating box (17), and the other end of the second heating pipe (19) is connected to the lower pyrolysis chamber (15) of the second low-temperature pyrolysis mechanism (3).

2. The high-efficiency rotating bed coal pyrolysis device according to claim 1, characterized in that: The heating mechanism (4) also includes a combustion head (20) and a fuel pipe (21). The fuel pipe (21) is connected to the combustion head (20) and is used to supply fuel to the combustion head (20). The combustion head (20) is fixedly installed in the middle of the interior of the heating box (17), and both the upper and lower surfaces of the combustion head (20) can burn.

3. The high-efficiency rotating bed coal pyrolysis device according to claim 1, characterized in that: The feeding mechanism (1) also includes a feeding hopper (22), a herringbone pipe (23) and two solenoid valves (24). The feeding hopper (22) is fixedly installed on the bracket. The herringbone pipe (23) is fixedly connected to the lower end of the feeding hopper (22). The two discharge ports (16) are located at the lower ends of the herringbone pipe (23) respectively. The solenoid valves (24) are installed on the herringbone pipe (23) and are located at the fork of the herringbone pipe (23).

4. The high-efficiency rotating bed coal pyrolysis device according to claim 3, characterized in that: The feeding hopper (22) is equipped with a feeding assembly, which includes a support beam (25), a first servo motor (26) and a spiral feeding rod (27). The support beam (25) is fixedly connected to the middle of the inner wall of the feeding hopper (22), the first servo motor (26) is fixedly connected to the surface of the support beam (25), and the spiral feeding rod (27) extends to the inlet of the herringbone tube (23) and is connected to the first servo motor (26) for transmission.

5. The high-efficiency rotating bed coal pyrolysis device according to claim 1, characterized in that: The inner wall of the heat-insulating inner cylinder (6) is fixedly connected to a material rake (28), the length of which is equal to the radius of the intelligent grate (13).

6. The high-efficiency rotating bed coal pyrolysis device according to claim 1, characterized in that: The intelligent grate (13) includes a movable ring (29), a middle heat-insulating pipe (30), multiple second servo motors (31) and multiple material racks (32). The movable ring (29) is rotatably connected to the inner wall of the heat-insulating inner cylinder (6). The middle heat-insulating pipe (30) is arranged between the inner walls on both sides of the movable ring (29). The multiple second servo motors (31) are fixedly connected to the inner walls on both sides of the middle heat-insulating pipe (30). One end of the material rack (32) is connected to the output end of the second servo motor (31) for transmission. The other end of the material rack (32) extends to the inner side of the movable ring (29).

7. The high-efficiency rotating bed coal pyrolysis device according to claim 6, characterized in that: The drive mechanism (12) includes a third servo motor (33), a transmission rod (34) and a heat insulation ring (35). The heat insulation ring (35) is fixedly connected between the bottom of the heat insulation shell (5) and the bottom of the heat insulation inner cylinder (6). The third servo motor (33) is fixedly connected to the bottom of the heat insulation shell (5) and located inside the heat insulation ring (35). One end of the transmission rod (34) is connected to the third servo motor (33) for transmission, and the other end of the transmission rod (34) passes through the bottom of the heat insulation inner cylinder (6) and is fixedly connected to the middle heat insulation pipe (30).

8. The high-efficiency rotating bed coal pyrolysis device according to claim 7, characterized in that: The surface of the transmission rod (34) is fixed with a hinge plate (36), and the surface of the hinge plate (36) is rotatably connected to a pusher plate (37).

9. The high-efficiency rotating bed coal pyrolysis device according to claim 1, characterized in that: There are multiple first heating pipes (18) and second heating pipes (19), which are arranged in a ring array around the heating box (17).

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