Crop residue carbonization preparation furnace

Abstract

The invention relates to the technical field of carbonization furnaces, in particular to a crop residue carbonization preparation furnace which comprises a conveying pipeline, an auger and a forming mold, the interior of the auger is rotationally installed in the conveying pipeline, and the forming mold is installed at the output end of the conveying pipeline; the heating cylinder is arranged in the middle of the conveying pipeline, the heater is installed on the outer side of the heating cylinder, the heating cylinder is made of a high-heat-conduction material, the drying cylinder is located above the conveying pipeline, and the discharging opening is communicated with an input port of the conveying pipeline; the barrel cover is detachably installed on a feeding opening of the drying barrel, the shaft pipe is installed on the barrel cover, a lower end opening of the shaft pipe extends into a drying cavity of the drying barrel, the upper end of the shaft pipe is connected with an air suction pipe of the vacuum pump, and the refrigerating mechanism refrigerates the drying barrel. By additionally arranging a dehydration function, the water content of crop residues is reduced, and the carbonization efficiency, the carbonization thorough degree and the biochar quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of carbonization furnaces, in particular to a furnace for carbonizing and preparing crop residues. Background Art

[0002] The carbonization preparation furnace of crop residues is a device for carbonizing crop residue biomass and producing biochar. A variety of carbonization preparation furnaces for crop residues have been proposed in the prior art. For example, the Chinese utility model patent with application number CN202022282171.1 proposes an efficient and environmentally friendly carbonization furnace suitable for straws of various types of crops. The carbonization furnace is suitable for efficient and environmentally friendly carbonization furnaces for straws of various types of crops. The design of the crushing component can crush the straw well, so that it can be better carbonized. The design of the long sheet body and the short sheet body further improves its crushing effect. In addition, the flue gas with a certain temperature enters the heating chamber of the shell, so that the straw crushed material transported inside the shell can be heated, so that the heat can be utilized. The heated straw crushed material can accelerate its carbonization efficiency in the carbonization furnace. In addition, the design of the filling layer and the liquid can purify the flue gas well, so that it will not pollute the environment when discharged.

[0003] In actual work, it is found that some crop residues have a relatively high water content, and most existing carbonization furnaces do not have a dehydration function. Directly placing crop residues with a high water content into the carbonization furnace will affect the carbonization efficiency, easily causing incomplete carbonization and affecting the quality of biochar preparation. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a crop residue carbonization preparation furnace which reduces the water content of crop residues by adding a dehydration function, improves the carbonization efficiency, the thoroughness of carbonization and the quality of biochar.

[0005] The invention discloses a carbonization preparation furnace for crop residues, comprising a conveying pipeline, an auger and a forming mold, wherein the auger is internally rotatably installed in the conveying pipeline, and the forming mold is installed at the output end of the conveying pipeline; the furnace also comprises a heating cylinder, a heater, a drying barrel, a barrel cover, an axle tube, a vacuum pump and a refrigeration mechanism, wherein the heating cylinder is arranged in the middle of the conveying pipeline, the heater is arranged on the outside of the heating cylinder, the heating cylinder is made of a high thermal conductivity material, the drying barrel is located above the conveying pipeline, a drying chamber is arranged inside the drying barrel, a feeding port communicating with the drying chamber is arranged at the upper end of the drying barrel, a discharge port communicating with the drying chamber is arranged at the lower end of the drying barrel, the discharge port is communicated with the input port of the conveying pipeline, the barrel cover is detachably installed on the feeding port of the drying barrel, the axle tube is installed on the barrel cover, the lower end of the axle tube extends into the drying chamber of the drying barrel, the upper end of the axle tube is connected to the suction pipe of the vacuum pump, and the refrigeration mechanism refrigerates the drying barrel; when working, a certain amount of crop residues is put into the drying chamber through the feeding port of the drying barrel. In the chamber, the barrel cover is sealed and installed on the feeding port of the drying barrel, the refrigeration mechanism cools the drying barrel to freeze the crop residues, and the vacuum pump draws the drying chamber of the drying barrel to a certain vacuum degree through the shaft tube, so that the crop residues reach the temperature and pressure of the triple point, so that the crop residues are freeze-dried in the drying chamber of the drying barrel, and the moisture in the crop residues directly and quickly sublimates, and the water vapor is extracted through the shaft tube, and the freeze-dried crop residues are input into the conveying pipeline through the discharge port of the drying barrel. The vacuum pumping effect also makes the inside of the conveying pipeline a low-pressure and oxygen-deficient state, and the auger is operated to convey the crop residues to the heating cylinder, and the heater is turned on to make the heating cylinder reach a high temperature state, so that the crop residues are oxygen-deficient carbonized in the heating cylinder, and the carbonized crop residues are discharged after being extruded and shaped by the forming mold, so as to make biochar, and by adding a dehydration function, the water content of the crop residues is reduced, the carbonization efficiency and the thoroughness of carbonization are improved, and the quality of the biochar is improved.

[0006] Preferably, a portion of the spiral blade of the auger in the heating cylinder close to the shaft is provided with a stop; after the auger rotates to push the crop residues in the conveying pipe into the heating cylinder, the portion of the auger in the heating cylinder stirs and breaks up the crop residues, thereby improving the heating uniformity of the crop residues and improving the carbonization effect.

[0007] Preferably, it also includes a filter box and a cloth bag, the filter box is installed between the shaft tube and the vacuum pump, the upper air inlet pipe of the filter box is connected to the upper end of the shaft tube, the cloth bag is installed in the filter box, the opening of the cloth bag is connected to the inner wall of the filter box, the lower air outlet pipe of the filter box is connected to the air inlet pipe of the vacuum pump, and the cloth bag filters the gas passing through the filter box; by arranging the filter box and the cloth bag to filter the gas, the wear on the vacuum pump is reduced.

[0008] Preferably, the refrigeration mechanism includes a coil, a heat preservation sleeve, a compressor and a heat exchanger. The coil is sleeved on the drying barrel, the heat preservation sleeve is sleeved on the outside of the drying barrel and the coil, the output end of the coil is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the heat exchanger, the outlet of the heat exchanger is connected to the input end of the coil, and the heat exchanger is arranged on the outer wall of the conveying pipeline; the coil, the compressor and the heat exchanger are filled with a refrigerant medium, and the operation of the compressor causes the refrigerant medium to circulate in the coil and the heat exchanger, so that the coil cools the drying barrel, and the temperature of the crop residue in the drying barrel reaches the triple point of water, which is convenient for freeze-drying, and the heat exchanger releases heat. The heat released by the heat exchanger heats the conveying pipeline, which is conducive to thawing the crop residue in the conveying pipeline.

[0009] Preferably, it also includes a temperature sensor and a pressure sensor, both of which are installed on the barrel cover, the temperature sensor detects the temperature in the drying chamber of the drying barrel, and the pressure sensor detects the vacuum degree in the drying chamber of the drying barrel; by setting the temperature sensor and the pressure sensor to monitor the temperature and vacuum degree in the drying barrel, it is convenient to adjust the power of the compressor and the vacuum pump, and the practicality is good.

[0010] Preferably, it also includes bearings, blades, a motor and a transmission assembly. The shaft tube is rotatably mounted on the barrel cover via the bearings. A plurality of blades are arranged at the lower part of the shaft tube. The motor is mounted on the barrel cover. The output shaft of the motor is connected to the shaft tube via the transmission assembly. The output shaft of the motor drives the shaft tube and the plurality of blades to rotate via the transmission assembly. The plurality of blades cut and crush the crop residues, which is beneficial to the complete carbonization of the crop residues and improves practicality.

[0011] Preferably, it also includes a rotating joint, which is installed at the upper end of the shaft tube, and the shaft tube is connected to the filter box through the rotating joint; by setting the rotating joint, the connecting pipeline between the shaft tube and the filter box will not be twisted and damaged when the shaft tube rotates.

[0012] Preferably, it also includes a flip motor and a gate plate, the flip motor is installed on the conveying pipeline, the gate plate is rotatably installed in the input port of the conveying pipeline through a rotating shaft, and the rotating shaft of the gate plate is connected to the output shaft of the flip motor; during the freeze-drying and crushing stage of the crop residue, the gate plate closes the input port of the conveying pipeline, so that it is easy to maintain a high vacuum degree in the drying barrel. After the freeze-drying is completed, the flip motor drives the gate plate to rotate to open the input port of the conveying pipeline, so that the crop residue can be easily discharged into the conveying pipeline.

[0013] Preferably, it also includes an exhaust pipe and a valve, the input end of the exhaust pipe extends into the heating cylinder, the output end of the exhaust pipe is connected to the air inlet pipe of the filter box, and the valve is installed on the exhaust pipe; when the crop residue is carbonized in the heating cylinder, the valve opens, and the smoke generated in the heating cylinder is discharged into the filter box through the exhaust pipe and filtered through a bag to reduce smoke pollution.

[0014] Preferably, it also includes an extrusion cylinder, which is conical and installed on the conveying pipeline. The extrusion cylinder is located between the heating cylinder and the forming mold, and one end of the auger extends into the extrusion cylinder; when the carbonized crop residues pass through the extrusion cylinder, they are squeezed and gathered, so that the biochar density is appropriate, not easy to loosen, and has good practicality.

[0015] Compared with the prior art, the beneficial effects of the present invention are: by adding a dehydration function, the water content of crop residues is reduced, the carbonization efficiency and the thoroughness of carbonization are improved, and the quality of biochar is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0017] Figure 2 is an axonometric schematic diagram of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the drying barrel, barrel cover, shaft tube, vacuum pump, filter box and refrigeration mechanism;

[0019] Figure 4 It is a schematic diagram of the exploded structure of the drying barrel, barrel cover, shaft tube, vacuum pump, filter box and refrigeration mechanism;

[0020] Figure 5 It is a schematic diagram of the structure of the vacuum pump, filter box and bag;

[0021] Figure 6 It is a partial cross-sectional structural diagram of the conveying pipeline, auger, forming die, heating cylinder and heater;

[0022] Figure 7 It is a structural diagram of the auger.

[0023] Markings in the attached figure: 1. conveying pipeline; 2. auger; 3. forming mold; 4. heating cylinder; 5. heater; 6. drying barrel; 7. barrel cover; 8. shaft tube; 9. vacuum pump; 10. filter box; 11. cloth bag; 12. coil; 13. insulation sleeve; 14. compressor; 15. heat exchanger; 16. temperature sensor; 17. pressure sensor; 18. bearing; 19. blade; 20. motor; 21. transmission assembly; 22. rotary joint; 23. flip motor; 24. gate; 25. exhaust pipe; 26. valve; 27. extrusion cylinder. DETAILED DESCRIPTION

[0024] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] Example 1

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, a carbonization preparation furnace for crop residues includes a conveying pipeline 1, an auger 2 and a forming mold 3. The auger 2 is internally rotatably installed in the conveying pipeline 1, and the forming mold 3 is installed at the output end of the conveying pipeline 1; it also includes a heating cylinder 4, a heater 5, a drying barrel 6, a barrel cover 7, an axle tube 8, a vacuum pump 9 and a refrigeration mechanism. The heating cylinder 4 is arranged in the middle of the conveying pipeline 1, the heater 5 is installed on the outside of the heating cylinder 4, the heating cylinder 4 is a high thermal conductivity material, the drying barrel 6 is located above the conveying pipeline 1, a drying chamber is arranged inside the drying barrel 6, a feeding port communicating with the drying chamber is arranged at the upper end of the drying barrel 6, a discharge port communicating with the drying chamber is arranged at the lower end of the drying barrel 6, the discharge port is communicated with the input port of the conveying pipeline 1, the barrel cover 7 is detachably installed on the feeding port of the drying barrel 6, the axle tube 8 is installed on the barrel cover 7, the lower end of the axle tube 8 extends into the drying chamber of the drying barrel 6, the upper end of the axle tube 8 is connected to the suction pipe of the vacuum pump 9, and the refrigeration mechanism cools the drying barrel 6; the spiral of the auger 2 The portion of the blade in the heating cylinder 4 close to the shaft is provided with a stop; the refrigeration mechanism includes a coil 12, a heat preservation sleeve 13, a compressor 14 and a heat exchanger 15, the coil 12 is sleeved on the drying barrel 6, the heat preservation sleeve 13 is sleeved on the outside of the drying barrel 6 and the coil 12, the output end of the coil 12 is connected to the inlet of the compressor 14, the outlet of the compressor 14 is connected to the inlet of the heat exchanger 15, the outlet of the heat exchanger 15 is connected to the input end of the coil 12, and the heat exchanger 15 is arranged on the outer wall of the conveying pipeline 1; it also includes a temperature sensor 16 and a pressure sensor 17, the temperature sensor 16 and the pressure sensor 17 are both installed on the barrel cover 7, the temperature sensor 16 detects the temperature in the drying chamber of the drying barrel 6, and the pressure sensor 17 detects the vacuum degree in the drying chamber of the drying barrel 6; it also includes an extrusion cylinder 27, the extrusion cylinder 27 is conical, the extrusion cylinder 27 is installed on the conveying pipeline 1, the extrusion cylinder 27 is located between the heating cylinder 4 and the forming mold 3, and one end of the auger 2 extends into the extrusion cylinder 27.

[0027] During operation, a certain amount of crop residues are put into the drying chamber through the feeding port of the drying barrel 6, and the barrel cover 7 is sealed and installed on the feeding port of the drying barrel 6. The coil 12, the compressor 14 and the heat exchanger 15 are filled with a refrigerant. The compressor 14 is operated to make the refrigerant circulate in the coil 12 and the heat exchanger 15, so that the coil 12 cools the drying barrel 6, so that the crop residues are frozen. The vacuum pump 9 draws the drying chamber of the drying barrel 6 to a certain vacuum degree through the shaft tube 8. The temperature sensor 16 and the pressure sensor 17 monitor the temperature and vacuum degree in the drying barrel 6, and the power of the compressor 14 and the vacuum pump 9 is conveniently adjusted to make the crop residues reach the temperature and pressure of the triple point, so that the crop residues are freeze-dried in the drying chamber of the drying barrel 6. The moisture in the crop residues is directly and quickly sublimated, and the water vapor is extracted through the shaft tube 8. The freeze-dried crop residues are discharged through the drying barrel 6. The steam is input into the conveying pipe 1, and the vacuum pump 9 makes the inside of the conveying pipe 1 a low-pressure and oxygen-deficient state. The heat exchanger 15 releases the heat, and the heat released by the heat exchanger 15 heats the conveying pipe 1, which is beneficial to the thawing of the crop residues in the conveying pipe 1. The auger 2 runs to convey the crop residues to the heating cylinder 4. After the auger 2 rotates to push the crop residues in the conveying pipe 1 into the heating cylinder 4, the part of the auger 2 in the heating cylinder 4 stirs and breaks up the crop residues to improve the heating uniformity of the crop residues. The heater 5 is turned on to make the heating cylinder 4 reach a high temperature state, so that the crop residues are carbonized by lack of oxygen in the heating cylinder 4. The carbonized crop residues are discharged after being extruded and shaped by the forming mold 3, thereby making biochar. By adding a dehydration function, the water content of the crop residues is reduced, the carbonization efficiency and the thoroughness of carbonization are improved, and the quality of the biochar is improved.

[0028] Example 2

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, it also includes a bearing 18, a blade 19, a motor 20 and a transmission assembly 21. The shaft tube 8 is rotatably mounted on the barrel cover 7 through the bearing 18. A plurality of blades 19 are arranged at the lower part of the shaft tube 8. The motor 20 is mounted on the barrel cover 7. The output shaft of the motor 20 is connected to the shaft tube 8 through the transmission assembly 21. It also includes a rotary joint 22. The rotary joint 22 is mounted on the upper end of the shaft tube 8. The shaft tube 8 is connected to the filter box 10 through the rotary joint 22. It also includes a flip motor 23 and a gate plate 24. The flip motor 23 is mounted on the conveying pipeline 1. The gate plate 24 is rotatably mounted in the input port of the conveying pipeline 1 through a rotating shaft. The rotating shaft of the gate plate 24 is connected to the output shaft of the flip motor 23.

[0030] The output shaft of the motor 20 drives the shaft tube 8 and multiple blades 19 to rotate through the transmission assembly 21. The multiple blades 19 cut and crush the crop residues, which is beneficial to the complete carbonization of the crop residues. By setting the rotating joint 22, the shaft tube 8 will not twist and damage the connecting pipeline between the shaft tube 8 and the filter box 10 when it rotates. During the freeze-drying and crushing stage of the crop residues, the gate plate 24 closes the input port of the conveying pipeline 1, so that it is easy to maintain a high vacuum degree in the drying barrel 6. After the freeze-drying is completed, the flip motor 23 drives the gate plate 24 to rotate to open the input port of the conveying pipeline 1, so that the crop residues can be easily discharged into the conveying pipeline 1.

[0031] Example 3

[0032] like Figure 5 and Figure 6 As shown, it also includes an exhaust pipe 25 and a valve 26. The input end of the exhaust pipe 25 extends into the heating tube 4, the output end of the exhaust pipe 25 is connected to the air inlet pipe of the filter box 10, and the valve 26 is installed on the exhaust pipe 25; it also includes a filter box 10 and a cloth bag 11. The filter box 10 is installed between the shaft tube 8 and the vacuum pump 9, the upper air inlet pipe of the filter box 10 is connected to the upper end of the shaft tube 8, the cloth bag 11 is installed in the filter box 10, the opening of the cloth bag 11 is connected to the inner wall of the filter box 10, the lower air outlet pipe of the filter box 10 is connected to the air inlet pipe of the vacuum pump 9, and the cloth bag 11 filters the gas passing through the filter box 10.

[0033] By setting up the filter box 10 and the cloth bag 11 to filter the gas, the wear on the vacuum pump 9 is reduced. When the crop residue is carbonized in the heating cylinder 4, the valve 26 is opened, and the smoke generated in the heating cylinder 4 is discharged into the filter box 10 through the exhaust pipe 25 and filtered by the cloth bag 11 to reduce smoke pollution.

[0034] like Figures 1 to 7As shown, a carbonization preparation furnace for crop residues of the present invention, when working, firstly put a certain amount of crop residues into the drying chamber through the feeding port of the drying barrel 6, and seal the barrel cover 7 to the feeding port of the drying barrel 6, the output shaft of the motor 20 drives the shaft tube 8 and the plurality of blades 19 to rotate through the transmission assembly 21, and the plurality of blades 19 cut and crush the crop residues, and then the refrigeration mechanism refrigerates the drying barrel 6 to freeze the crop residues, and the vacuum pump 9 draws the drying chamber of the drying barrel 6 to a certain vacuum degree through the shaft tube 8, so that the crop residues reach the temperature and pressure of the triple point, so that the crop residues are freeze-dried in the drying chamber of the drying barrel 6, and the moisture in the crop residues is directly and quickly discharged. The crop residues are quickly sublimated, and the water vapor is extracted through the shaft tube 8. Then the turning motor 23 drives the gate plate 24 to rotate to open the input port of the conveying pipeline 1. The freeze-dried crop residues are input into the conveying pipeline 1 through the discharge port of the drying barrel 6. The auger 2 is operated to transport the crop residues to the heating cylinder 4. The heater 5 is turned on to make the heating cylinder 4 reach a high temperature state, so that the crop residues are carbonized by lack of oxygen in the heating cylinder 4. The valve 26 is opened, and the smoke generated in the heating cylinder 4 is discharged into the filter box 10 through the exhaust pipe 25 and filtered through the bag 11. Finally, the carbonized crop residues are squeezed and gathered when passing through the extrusion cylinder 27. The crop residues are extruded and shaped by the forming mold 3 and then discharged, thereby making biochar.

[0035] The main functions achieved by the present invention are:

[0036] 1. By adding a dehydration function, the water content of crop residues can be reduced, and the carbonization efficiency, the thoroughness of carbonization and the quality of biochar can be improved;

[0037] 2. It has the function of crushing crop residues and improving the carbonization effect of crop residues;

[0038] 3. It has smoke filtering function to reduce smoke pollution.

[0039] The installation method, connection method or setting method of the crop residue carbonization preparation furnace of the present invention are all common mechanical methods, and can be implemented as long as the beneficial effects can be achieved; the conveying pipeline 1, auger 2, forming mold 3, heater 5, vacuum pump 9, filter box 10, cloth bag 11, coil 12, insulation sleeve 13, compressor 14, heat exchanger 15, temperature sensor 16, pressure sensor 17, bearing 18, blade 19, motor 20, transmission assembly 21, rotary joint 22, flip motor 23, gate 24, valve 26, and extrusion cylinder 27 of the crop residue carbonization preparation furnace of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A carbonization preparation furnace for crop residues, comprising a conveying pipeline (1), an auger (2) and a forming mold (3), wherein the auger (2) is internally rotatably installed in the conveying pipeline (1), and the forming mold (3) is installed at the output end of the conveying pipeline (1); characterized in that: The invention also comprises a heating cylinder (4), a heater (5), a drying barrel (6), a barrel cover (7), an axle tube (8), a vacuum pump (9) and a refrigeration mechanism. The heating cylinder (4) is arranged in the middle of the conveying pipeline (1). The heater (5) is installed on the outside of the heating cylinder (4). The heating cylinder (4) is made of a high thermal conductivity material. The drying barrel (6) is located above the conveying pipeline (1). A drying chamber is arranged inside the drying barrel (6). A loading port communicating with the drying chamber is arranged at the upper end of the drying barrel (6). A discharge port communicating with the drying chamber is arranged at the lower end of the drying barrel (6). The discharge port is communicated with an input port of the conveying pipeline (1). The barrel cover (7) is detachably mounted on the loading port of the drying barrel (6). The axle tube (8) is installed on the barrel cover (7). The lower end of the axle tube (8) extends into the drying chamber of the drying barrel (6). The upper end of the axle tube (8) is connected to the suction pipe of the vacuum pump (9). The refrigeration mechanism cools the drying barrel (6).

2. The crop residue carbonization preparation furnace according to claim 1, characterized in that: A portion of the spiral blade of the auger (2) in the heating cylinder (4) close to the shaft is provided with a stop.

3. The carbonization furnace for preparing crop residues according to claim 1, characterized in that: The invention also comprises a filter box (10) and a cloth bag (11), wherein the filter box (10) is installed between the shaft tube (8) and the vacuum pump (9), the upper air inlet pipe of the filter box (10) is connected to the upper end of the shaft tube (8), the cloth bag (11) is installed in the filter box (10), the opening of the cloth bag (11) is connected to the inner wall of the filter box (10), the lower air outlet pipe of the filter box (10) is connected to the air inlet pipe of the vacuum pump (9), and the cloth bag (11) filters the gas passing through the filter box (10).

4. The crop residue carbonization preparation furnace according to claim 1, characterized in that: The refrigeration mechanism comprises a coil (12), a heat preservation sleeve (13), a compressor (14) and a heat exchanger (15); the coil (12) is sleeved on a drying barrel (6); the heat preservation sleeve (13) is sleeved on the outer side of the drying barrel (6) and the coil (12); the output end of the coil (12) is connected to the inlet end of the compressor (14); the outlet end of the compressor (14) is connected to the inlet end of the heat exchanger (15); the outlet end of the heat exchanger (15) is connected to the input end of the coil (12); and the heat exchanger (15) is arranged on the outer wall of the conveying pipeline (1).

5. The carbonization furnace for preparing crop residues according to claim 4, characterized in that: The invention also comprises a temperature sensor (16) and a pressure sensor (17), both of which are mounted on the barrel cover (7), the temperature sensor (16) detecting the temperature in the drying chamber of the drying barrel (6), and the pressure sensor (17) detecting the vacuum degree in the drying chamber of the drying barrel (6).

6. The carbonization furnace for preparing crop residues according to claim 1, characterized in that: The invention also comprises a bearing (18), a blade (19), a motor (20) and a transmission assembly (21); the shaft tube (8) is rotatably mounted on the barrel cover (7) via the bearing (18); a plurality of blades (19) are arranged at the lower part of the shaft tube (8); the motor (20) is mounted on the barrel cover (7); and the output shaft of the motor (20) is transmission-connected to the shaft tube (8) via the transmission assembly (21).

7. The carbonization furnace for preparing crop residues according to claim 6, characterized in that: It also comprises a rotary joint (22), which is installed on the upper end of the shaft tube (8), and the shaft tube (8) is connected with the filter box (10) through the rotary joint (22).

8. The crop residue carbonization preparation furnace according to claim 1, characterized in that: It also includes a flip motor (23) and a gate plate (24), wherein the flip motor (23) is mounted on the conveying pipeline (1), and the gate plate (24) is rotatably mounted in the input port of the conveying pipeline (1) via a rotating shaft, and the rotating shaft of the gate plate (24) is connected to the output shaft of the flip motor (23).

9. The carbonization furnace for preparing crop residues according to claim 3, characterized in that: It also includes an exhaust pipe (25) and a valve (26), wherein the input end of the exhaust pipe (25) extends into the heating cylinder (4), the output end of the exhaust pipe (25) is connected to the air inlet pipe of the filter box (10), and the valve (26) is installed on the exhaust pipe (25).

10. The carbonization furnace for preparing crop residues according to claim 1, characterized in that: It also includes an extrusion cylinder (27) which is conical and installed on the conveying pipeline (1). The extrusion cylinder (27) is located between the heating cylinder (4) and the forming mold (3), and one end of the auger (2) extends into the extrusion cylinder (27).

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