Carbonization system and carbonization method

Abstract

The invention provides a carbonization system and a carbonization method, and the system comprises a carbonization device which comprises a carbonization cylinder and a hot air conveying pipeline, and the carbonization cylinder is rotatably arranged around the central axis of the carbonization cylinder; a material feeding opening is formed in the head end of the carbonization barrel, a treated material discharging opening is formed in the tail end of the carbonization barrel, and a preset included angle is formed between the central shaft and the mounting horizontal plane; the gas-solid separation chamber is connected with the treated material outlet, a pyrolysis gas outlet is formed in the upper part of the gas-solid separation chamber, and a carbide outlet is formed in the bottom of the gas-solid separation chamber; the hot blast stove comprises a stove body and a combustor. The furnace body and the gas-solid separation chamber are arranged on the same wall, and the combustor is adjacently connected with the pyrolysis gas outlet and used for combusting separated pyrolysis gas to generate high-temperature hot air; the furnace body is also connected with a cooling device; the hot air conveying pipeline penetrates through the gas-solid separation chamber, is communicated with the furnace body and is used for providing heat energy for carbonization of materials in the carbonization barrel; according to the method, tar blockage of the tobacco stems in the carbonization process can be avoided, and continuous production is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbonization, and in particular to a tobacco stem carbonization system and a carbonization method. Background Art

[0002] During the tobacco stem incineration process, since tobacco stems are rich in alkali metals such as potassium and sodium, tar is often produced due to excessive temperature during the incineration carbonization process, which leads to problems such as coking and scaling of the furnace wall, blockage of the precipitated gas channel, and material agglomeration. Therefore, it is difficult for traditional carbonization systems to achieve continuous production.

[0003] Therefore, there is an urgent need for a carbonization system and a carbonization method to avoid tar blockage of tobacco stems during the carbonization process and to achieve continuous production. Summary of the invention

[0004] The purpose of the present invention is to provide a carbonization system and a carbonization method, aiming to solve the technical problems that the traditional carbonization system is prone to coking and is difficult to achieve continuous generation.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a carbonization system, comprising:

[0006] The carbonization device comprises a carbonization cylinder and a hot air conveying pipeline arranged in the carbonization cylinder, wherein the carbonization cylinder is rotatable around its central axis; a material input port is arranged at the head end of the carbonization cylinder, a processed material discharge port is arranged at the tail end, and the central axis is arranged at a preset angle with the installation horizontal plane;

[0007] A gas-solid separation chamber is connected to the treated material discharge port, and is provided with a pyrolysis gas discharge port at the top and a carbide discharge port at the bottom;

[0008] A hot blast furnace, comprising a furnace body and a burner connected thereto; the furnace body and the gas-solid separation chamber are arranged on the same wall, and the burner is adjacently connected to the pyrolysis gas outlet, and is used to burn the pyrolysis gas separated from the gas-solid separation chamber to generate high-temperature hot blast; the furnace body is also connected to a cooling device, which is used to reduce the temperature of the hot blast generated by the combustion of the pyrolysis gas;

[0009] The hot air delivery duct passes through the gas-solid separation chamber and is in communication with the furnace body, and is used to transmit the hot air reduced to a preset temperature into the carbonization cylinder to provide heat energy for carbonization of the material.

[0010] As a further improvement of the above solution, the furnace body is provided with an exhaust port, and the exhaust port is provided with an exhaust control valve;

[0011] A temperature detection device is also provided in the furnace body, and the temperature detection device is communicatively connected with the exhaust control valve, and is used for exhausting excess hot air in the hot air furnace to control the carbonization temperature in the carbonization cylinder.

[0012] As a further improvement of the above scheme, the carbonization cylinder is provided with an exhaust gas exhaust device near the head end, which is used to exhaust the hot air after heat exchange and temperature reduction by the carbonization device;

[0013] The tail gas exhaust device is also connected to the exhaust control valve through a hot air bypass pipe, and is used to exhaust excess hot air in the hot air furnace.

[0014] As a further improvement of the above solution, the carbonization device also includes a rotation driving device, which is drivingly connected to the carbonization cylinder and is used to drive the carbonization cylinder to rotate.

[0015] As a further improvement of the above scheme, the rotation drive device includes an active friction drive device, which includes a drive motor-reducer, a first active friction wheel drivingly connected to the drive motor-reducer, and a first driven friction wheel arranged on the outer wall of the carbonized cylinder and pressed into engagement with the first active friction wheel.

[0016] As a further improvement of the above scheme, the rotary drive device also includes a follower friction drive device, which includes a second active friction wheel, a second driven friction wheel arranged on the outer wall of the carbonized cylinder and pressed into engagement with the second active friction wheel, and the first driven friction wheel and the second driven friction wheel are arranged at intervals on the outer wall of the carbonized cylinder.

[0017] As a further improvement of the above scheme, the head end of the carbonization cylinder is connected to a waste gas smoke chamber, and the waste gas smoke chamber is connected to the tail gas exhaust device to discharge the waste gas generated during the carbonization process of the material;

[0018] The exhaust gas chamber is sealed and connected to the head end of the carbonization cylinder through a head seal;

[0019] The tail end of the carbonization cylinder is sealed and connected to the gas-solid separation chamber through a tail seal.

[0020] As a further improvement of the above scheme, one end of the hot air conveying pipe is fixedly connected to the exhaust gas chamber, and the other end passes through the carbonization cylinder, the gas-solid separation chamber, is connected to the hot air furnace, and is fixedly connected to the gas-solid separation chamber.

[0021] As a further improvement of the above solution, there is at least one hot air delivery pipeline.

[0022] As a further improvement of the above scheme, the carbonization system also includes a feeding device, which is connected to the material input port to feed the tobacco stem carbonization device.

[0023] As a further improvement of the above scheme, the feeding device includes a feeding screw, a feeding unloading valve and a feeding bin which are sequentially connected to the head end of the carbonization cylinder; the feeding unloading valve is arranged at the bottom of the feeding bin and is connected to the feeding port of the feeding screw; the feeding bin is sealed.

[0024] As a further improvement of the above scheme, the exhaust gas discharge device includes an exhaust gas treatment device, an exhaust gas discharge fan and a chimney which are sequentially connected to the head end of the carbonization cylinder;

[0025] The exhaust gas exhaust fan is a variable frequency controlled fan, which is used to maintain a slight negative pressure state in the system.

[0026] As a further improvement of the above scheme, the gas-solid separation chamber includes a separation chamber body, a pyrolysis gas pipe arranged at the top of the separation chamber body, a cooling spiral communicating with the bottom of the separation chamber body, and a discharge valve connected to the cooling spiral;

[0027] The pyrolysis gas pipe is connected to the burner;

[0028] A side wall of the separation chamber body is communicated with the rear end of the carbonization cylinder, and an opposite side wall thereof is arranged on the same wall as the furnace body.

[0029] As a further improvement of the above solution, the burner can also be operably connected to an external gas device to provide startup heat energy for the carbonization device.

[0030] As a further improvement of the above solution, the preset angle from the material input port toward the processed material discharge port is greater than 2.5°, so that the material can be slowly transported from the head to the tail of the carbonization cylinder.

[0031] In a second aspect, the present invention further provides a carbonization method of the above carbonization system, the steps of which include:

[0032] S1: rotating the carbonization cylinder, connecting the burner of the hot blast furnace to the external combustion gas to generate high-temperature hot blast, and starting the cooling device of the hot blast furnace to reduce the high-temperature hot blast to a predicted temperature range;

[0033] S2: The hot air reaching the preset temperature range is transported into the carbonization cylinder through the hot air transport pipeline to heat and carbonize the material disposed in the carbonization cylinder;

[0034] S3: The output of the carbonization process enters the gas-solid separation chamber for gas-solid separation, and the separated pyrolysis gas is connected to the burner for combustion to generate high-temperature hot air, while the external combustion gas is turned off, and the cooling device of the hot air furnace continuously reduces the high-temperature hot air to a predicted temperature range;

[0035] The separated solid carbon is discharged from the bottom of the gas-solid separation chamber; steps S2 and S3 are repeated until the carbonization of the material is completed.

[0036] As a further improvement of the above scheme, the gas-solid separation chamber is also provided with an exhaust port. When the temperature inside the chamber still exceeds the preset temperature range under the action of the cooling device, the high-temperature hot air is directly discharged from the exhaust port.

[0037] Since the present invention adopts the above technical solution, the beneficial effects of this application are:

[0038] The present invention provides a carbonization system, comprising: a carbonization device, comprising a carbonization cylinder and a hot air conveying pipeline arranged in the carbonization cylinder, the carbonization cylinder being rotatable around its central axis; a material input port is arranged at the head end of the carbonization cylinder, a processed material discharge port is arranged at the tail end thereof, and the central axis is arranged at a preset angle with a mounting horizontal plane; a gas-solid separation chamber is connected to the processed material discharge port, and a pyrolysis gas discharge port is arranged at the upper part thereof, and a carbonization discharge port is arranged at the bottom; a hot air furnace, comprising a furnace body and a burner arranged in communication with the furnace body; the furnace body and the gas-solid separation chamber are arranged on the same wall, and the burner is connected adjacent to the pyrolysis gas discharge port, and is used to burn the pyrolysis gas separated by the gas-solid separation chamber to generate high-temperature hot air; the furnace body is also connected to a cooling device, which is used to reduce the temperature of the hot air generated by the combustion of the pyrolysis gas; the hot air conveying pipeline passes through the gas-solid separation chamber and is connected with the furnace body, and is used to transmit the hot air reduced to a preset temperature into the carbonization cylinder to provide heat energy for material carbonization; such an arrangement, on the one hand, the furnace body The body and the gas-solid separation chamber are arranged on the same wall, and the burner is arranged to be adjacent to the pyrolysis gas outlet, so that the pyrolysis gas separated by the gas-solid separation chamber can be quickly burned by the burner to generate high-temperature hot air; since the transmission path of the pyrolysis gas from the separation to the burner is very short, and its own temperature is relatively high, the problem of tar precipitation from the pyrolysis gas and pipe blockage is avoided, which provides a guarantee for continuous production; on the other hand, the furnace body is also connected to a cooling device for cooling the high-temperature hot air generated by the combustion of the pyrolysis gas, so that the high-temperature hot air is reduced to a suitable temperature for carbonization, thereby avoiding the coking of the material in the carbonization cylinder, further providing a guarantee for continuous production; on the other hand, in the present invention, in order to realize the continuous production of tobacco stem carbonization, the carbonization cylinder can be rotatably arranged, and the central axis of the carbonization cylinder is inclined at a preset angle to the installation horizontal plane, so that the carbonized material (tobacco stem) rotates continuously in the carbonization cylinder, so as to ensure that the carbonized material (tobacco stem) is slowly and continuously transported from the head end to the tail end of the carbonization cylinder;

[0039] In some preferred embodiments, the furnace body is provided with an exhaust port, and the exhaust port is provided with an exhaust control valve; a temperature detection device is also provided in the furnace body, and the temperature detection device is communicatively connected with the exhaust control valve. When the temperature detection device detects that the temperature in the furnace body exceeds a preset temperature value, the exhaust control valve is opened to directly discharge excess hot air, thereby lowering the temperature in the furnace body, so that the temperature transported to the carbonization cylinder through the hot air delivery pipeline is maintained at a temperature suitable for carbonization and not easy to coke, thereby further avoiding coking of materials in the carbonization cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0041] Figure 1 A schematic diagram of a carbonization system disclosed in the present invention;

[0042] Figure 2 It is a perspective front view schematic diagram of the carbonization device disclosed in the present invention;

[0043] Figure 3 It is a perspective schematic diagram of a carbonization device and a gas-solid separation chamber disclosed in the present invention;

[0044] Figure 4 It is a three-dimensional cross-sectional schematic diagram of the carbonization device and the gas-solid separation chamber disclosed in the present invention;

[0045] Reference numerals:

[0046] 1. Carbonization device; 11. Carbonization cylinder; 111. Material input port; 112. Processed material discharge port; 12. Hot air delivery pipeline; 13. Exhaust gas discharge device; 131. Exhaust gas treatment device; 132. Exhaust gas discharge fan; 133. Chimney;

[0047] 14. Rotation drive device; 15. Active friction drive device; 151. Drive motor-reducer; 152. First active friction wheel; 153. First driven friction wheel; 16. Follow-up friction drive device; 161. Second active friction wheel; 162. Second driven friction wheel; 17. Exhaust gas chamber; 18. Head seal; 19. Tail seal;

[0048] 2. Gas-solid separation chamber; 20. Separation chamber body; 21. Pyrolysis gas outlet; 22. Carbide outlet; 23. Pyrolysis gas pipe; 24. Cooling spiral; 25. Discharge valve;

[0049] 3. Hot air furnace; 31. Furnace body; 311. Exhaust port; 312. Exhaust control valve; 32. Burner; 33. Cooling device; 34. Hot air bypass pipe;

[0050] 4. Feeding device; 41. Feeding screw; 42. Feeding discharge valve; 43. Feeding bin;

[0051] 5. External gas device.

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0056] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0057] Embodiment 1:

[0058] See also Figure 1-Figure 4 The present invention provides a carbonization system. In order to better illustrate the working principle of the present invention, in this embodiment, tobacco stems are used as the processing object of the carbonization system, but it is not limited to tobacco stems. Specifically, the carbonization system includes:

[0059] A carbonization device 1 comprises a carbonization cylinder 11 and a hot air conveying duct 12 arranged in the carbonization cylinder 11, wherein the carbonization cylinder 11 is rotatable around its central axis; a material input port 111 is arranged at the head end of the carbonization cylinder 11, and a processed material discharge port 112 is arranged at the tail end thereof, and the central axis is arranged at a preset angle with a mounting horizontal plane, and the preset angle from the material input port 111 toward the processed material discharge port 112 is greater than 2.5°. In the present embodiment, the preset angle is 2.6° and is inclined so that the tobacco stem material is slowly conveyed from the head to the tail of the carbonization cylinder 11;

[0060] The gas-solid separation chamber 2 is used to separate the pyrolysis gas and solid carbide produced during the carbonization process of the material in the carbonization cylinder 11. The gas-solid separation chamber 2 is connected to the treated material discharge port 112, and a pyrolysis gas discharge port 21 is provided at the top thereof for discharging the separated pyrolysis gas, and a carbide discharge port 22 is provided at the bottom thereof for discharging the separated solid carbide;

[0061] The hot blast furnace 3 comprises a furnace body 31 and a burner 32 connected thereto; the furnace body 31 and the gas-solid separation chamber 2 are provided on the same wall, and the burner 32 is adjacently connected to the pyrolysis gas outlet 21, and is used to burn the pyrolysis gas separated from the gas-solid separation chamber 2 to generate high-temperature hot blast; the furnace body 31 is also connected to a cooling device 33, which is used to reduce the temperature of the hot blast generated by the combustion of the pyrolysis gas;

[0062] The hot air delivery pipe 12 passes through the gas-solid separation chamber 2 and is in communication with the furnace body 31, and is used to transmit the hot air reduced to a preset temperature to the carbonization cylinder 11 to provide heat energy for carbonization of the material;

[0063] Specifically, in this embodiment, the burner 32 is installed on the top of the hot blast furnace 3, and the burner 32 burns the pyrolysis gas to form a high-temperature hot blast of about 1000°C. The temperature of the high-temperature hot blast is reduced to 600-700°C by the cooling device 33, and then the hot blast of 600-700°C is transported from the tail end of the carbonization cylinder 11 through the hot blast conveying pipe 12, and indirectly exchanges heat with the tobacco stem material as a heat source for carbonization of the tobacco stem. The tobacco stem material is heated to about 500°C to achieve complete carbonization without coking.

[0064] With such an arrangement, on the one hand, the furnace body 31 and the gas-solid separation chamber 2 are arranged on the same wall, and the burner 32 is arranged adjacent to the pyrolysis gas outlet 21, so that the pyrolysis gas separated by the gas-solid separation chamber 2 can be quickly burned by the burner 32 to generate high-temperature hot air; since the transmission path of the pyrolysis gas from the separation to the burner 32 is very short, and its own temperature is relatively high, the problem of tar precipitation from the pyrolysis gas and blockage of the pipe is avoided, providing a guarantee for continuous production; on the other hand, the furnace body 31 is also connected to a cooling device 33 for cooling the pyrolysis gas. The high-temperature hot air generated by the combustion of the gas can be reduced to a suitable temperature for carbonization, thereby avoiding coking of the material in the carbonization cylinder 11, and further providing guarantee for continuous production; on the other hand, in the present invention, in order to realize the continuous production of tobacco stem carbonization, the carbonization cylinder 11 can be rotatably arranged, and the central axis of the carbonization cylinder 11 is inclined at a preset angle to the installation horizontal plane, so that the carbonized material (tobacco stem) keeps rotating in the carbonization cylinder 11, so as to ensure that the carbonized material (tobacco stem) is slowly and continuously transported from the head end to the tail end of the carbonization cylinder 11.

[0065] As a preferred embodiment, in order to prevent the carbonization cylinder 11 from overheating and coking, the furnace body 31 is provided with an exhaust port 311, and the exhaust port 311 is provided with an exhaust control valve 312;

[0066] The furnace body 31 is also provided with a temperature detection device, which is in communication with the exhaust control valve 312 and is used to exhaust the excess hot air in the hot air furnace 3 to control the carbonization temperature in the carbonization cylinder 11;

[0067] When the temperature detection device detects that the temperature inside the furnace body 31 exceeds the preset temperature value, the exhaust control valve 312 opens to directly discharge the excess hot air, thereby lowering the temperature inside the furnace body 31, so that the temperature delivered to the carbonization cylinder 11 through the hot air delivery pipe 12 is maintained at a temperature suitable for carbonization and not prone to coking, further avoiding coking of materials in the carbonization cylinder 11.

[0068] As a preferred embodiment, a tail gas exhaust device 13 is provided near the head end of the carbonization cylinder 11, which is used to exhaust the hot air after heat exchange and cooling by the carbonization device 1; the tail gas exhaust device 13 includes a tail gas treatment device 131, a waste gas exhaust fan 132 and a chimney 133 connected to the head end of the carbonization cylinder 11 in sequence; specifically, the hot air after heat exchange and cooling by the carbonization device 1 is about 200°C, and then passes through the tail gas treatment device 131 for cooling and dust removal, and then is discharged through the exhaust fan and the chimney 133, thereby reducing pollution to the environment;

[0069] In order to reduce pollution to the environment, the exhaust gas discharge device 13 is also connected to the exhaust control valve 312 through a hot air bypass pipe 34, so as to discharge the excess hot air in the hot air furnace 3, so that the excess hot air in the hot air furnace 3 is discharged into the air after being cooled and dust-removed by the exhaust gas discharge device 13, thereby reducing pollution to the environment;

[0070] In some embodiments, the exhaust gas exhaust fan 132 is a variable frequency controlled fan. During the exhaust process of the exhaust gas, the variable frequency automatic control of the exhaust gas exhaust fan 132 is used to ensure that all equipment in the system is operating under a slightly negative pressure (-100pa~0) condition, so as to ensure that there are no leakage safety hazards in each device in the system, and at the same time avoid possible leakage of odorous gases from various equipment in the system.

[0071] As a preferred embodiment, the carbonization device 1 further comprises a rotation driving device 14, which is drivingly connected to the carbonization cylinder 11 and is used to drive the carbonization cylinder 11 to rotate so that the tobacco stem material inside can be slowly and continuously transported from the head end to the tail end;

[0072] In this embodiment, see Figure 2 and Figure 3 The rotary drive device 14 includes an active friction drive device 15, which includes a driving motor-reducer 151, a first active friction wheel 152 drivingly connected to the driving motor-reducer 151, and a first driven friction wheel 153 provided on the outer wall of the carbonized cylinder 11 and pressed tightly with the first active friction wheel 152;

[0073] The rotary drive device 14 also includes a follower friction drive device 16, which includes a second active friction wheel 161, a second driven friction wheel 162 arranged on the outer wall of the carbonizing cylinder 11 and pressed together with the second active friction wheel 161, and the first driven friction wheel 153 and the second driven friction wheel 162 are arranged on the outer wall of the carbonizing cylinder 11 at intervals; in this embodiment, the rotation of the carbonizing cylinder 11 is achieved by friction driving, which is convenient for controlling the rotation speed of the carbonizing cylinder 11, and can slowly transport the tobacco stem material from the head end to the tail end while ensuring that the tobacco stem material is fully carbonized; in addition, by providing an active friction drive device 15 and a follower friction drive device 16, on the one hand, support is provided for the carbonizing cylinder 11, and on the other hand, the carbonizing cylinder 11 is facilitated to rotate stably and smoothly, and the structure of the rotary drive device 14 is simple and reliable, which further provides a guarantee for realizing continuous production.

[0074] As a preferred embodiment, the head end of the carbonization cylinder 11 is connected to a waste gas smoke chamber 17, and the waste gas smoke chamber 17 is connected to the tail gas exhaust device 13 to discharge the waste gas generated during the carbonization process of the material;

[0075] The exhaust gas chamber 17 is sealed and connected to the head end of the carbonization cylinder 11 through a head seal 18;

[0076] The tail end of the carbonization cylinder 11 is sealed and connected to the gas-solid separation chamber 2 via a tail seal 19;

[0077] The exhaust gas chamber 17 is provided to cache a portion of the exhaust gas, so that the exhaust gas discharge device 13 can fully cool and remove dust from the exhaust gas; in addition, since the carbonization cylinder 11 needs to be rotatable, the exhaust gas chamber 17 is fixedly provided, so that the head seal 18 and the exhaust gas chamber 17 can be sealed and rotatable;

[0078] In the present embodiment, the head seal 18 and the tail seal 19 are both made of high temperature resistant flexible dynamic fluororubber plates, which are practical and reliable, simple in structure, and easy to replace and maintain.

[0079] As a preferred embodiment, one end of the hot air delivery pipe 12 is fixedly connected to the exhaust gas chamber 17, and the other end passes through the carbonization cylinder 11, the gas-solid separation chamber 2 and communicates with the hot air furnace 3, and is fixedly connected to the gas-solid separation chamber 2; such a setting only requires rotating the carbonization cylinder 11, and the hot air delivery pipe 12 is fixedly set, so that the structure of the carbonization device 1 is simple and reliable;

[0080] The number of the hot air delivery pipe 12 is at least one. Figure 3 There are three hot air conveying pipes 12, which are evenly distributed in the carbonizing cylinder 11, so as to fully convey hot air to the tobacco stem materials therein.

[0081] As a preferred embodiment, the carbonization system further comprises a feeding device 4, and the feeding device 4 is connected to the material input port 111 to feed the tobacco stem carbonization device 1;

[0082] For details, see Figure 1 In this embodiment, the feeding device 4 includes a feeding screw 41, a feeding discharge valve 42 and a feeding bin 43 which are sequentially connected to the head end of the carbonization cylinder 11; the feeding discharge valve 42 is arranged at the bottom of the feeding bin 43 and connected to the feeding port of the feeding screw 41;

[0083] Specifically, the tobacco stem material is transported to the feed bin 43 through a feeding conveyor. The feed bin 43 is airtightly arranged. A feed discharge valve 42 is arranged at the bottom of the feed bin 43. The outlet of the feed discharge valve 42 is connected to a feed screw 41. The feed amount and uniform feeding of the tobacco stem material to the carbonization device 1 are controlled by the feed discharge valve 42 and the feed screw 41. The airtight design of the feed bin 43, the feed discharge valve 42 and the feed screw 41 ensure that the feed end of the carbonization device 1 is isolated from air. The tobacco stem material is then transported to the carbonization cylinder 11 for anaerobic carbonization. Under the action of the heat source, the tobacco stem material is gradually heated to a carbonization temperature of about 500°C to produce pyrolysis gas and tobacco stem charcoal.

[0084] As a preferred embodiment, the gas-solid separation chamber 2 includes a separation chamber body 20, a pyrolysis gas pipe 23 arranged at the top of the separation chamber body 20, a cooling spiral 24 connected to the bottom of the separation chamber body 20, and a discharge valve 25 connected to the cooling spiral 24;

[0085] The pyrolysis gas pipe 23 is connected to the burner 32;

[0086] One side wall of the separation chamber body 20 is connected to the rear end of the carbonization cylinder 11, and the opposite side wall is arranged on the same wall as the furnace body 31; since the separation chamber body 20 and the furnace body 31 are arranged on the same wall, the pyrolysis gas pipe 23 only needs a short length to be transported to the burner 32, thereby preventing the separated pyrolysis gas from being burned quickly in the burner 32, thereby avoiding the generation of tar;

[0087] The soot char separated in the gas-solid separation chamber 2 is deposited at the bottom of the separation chamber body 20 and enters the cooling spiral 24 to cool to room temperature, and then discharged through the discharge valve 25; in this embodiment, the soot char is discharged through the cooling spiral 24 and the discharge valve 25 to achieve air isolation at the tail end of the carbonization device 1, thereby ensuring that the entire carbonization process is carried out in an air-isolated environment, thereby ensuring that the tobacco stem material is fully carbonized.

[0088] It should be noted that, in the present embodiment, the burner 32 is a dual-purpose burner 32, which is not only connected to the pyrolysis gas port 21, but also operably connected to an external gas device 5. Preferably, natural gas is selected as the heat source of the external gas device, and as the starting heat source of the carbonization device 1; when the tobacco stem material in the carbonization cylinder 11 burns normally and produces pyrolysis gas, the natural gas source is turned off, and only the pyrolysis gas separated during the tobacco stem carbonization process is used as the heat source for continuous carbonization, so as to achieve the purpose of energy saving and environmental protection.

[0089] In addition, the carbonization device 1, the gas-solid separation chamber 2, the hot air furnace 3 and the pyrolysis gas pipe 23 are all provided with an insulation structure (not shown in the drawings). The setting of the insulation structure, on the one hand, provides the thermal efficiency of the carbonization system provided by the present invention, and on the other hand, the insulation structure can serve as a safety protection measure against high temperature burns to ensure the safety of personnel.

[0090] Embodiment 2:

[0091] The present invention also provides a carbonization method of the above carbonization system, the steps of which include:

[0092] S1: The carbonization cylinder 11 is continuously rotated, and the burner 32 of the hot blast furnace 3 is connected to the external combustion gas to generate high-temperature hot blast, and the cooling device 33 of the hot blast furnace 3 is started to reduce the high-temperature hot blast to a predicted temperature range;

[0093] S2: The hot air reaching the preset temperature range is transported to the carbonization cylinder 11 through the hot air transport pipe 12 to heat and carbonize the material disposed in the carbonization cylinder 11;

[0094] S3: The output of the carbonization process enters the gas-solid separation chamber 2 for gas-solid separation, and the separated pyrolysis gas is connected to the burner 32 for combustion to generate high-temperature hot air. At the same time, the external combustion gas is turned off, and the cooling device 33 of the hot air furnace 3 continuously reduces the high-temperature hot air to a predicted temperature range; in this embodiment, the preset temperature range is 500-700°C. Within this preset temperature range, hot air enters the carbonization cylinder 11 as a carbonization heat source for the tobacco stem material, and the tobacco stem material is gradually heated to about 500°C, which is not easy to coke, for tobacco stem carbonization;

[0095] The separated solid carbon is discharged from the bottom of the gas-solid separation chamber 2; steps S2 and S3 are repeated until the carbonization of the material is completed; with such a setting, the pyrolysis gas separated during the carbonization process is used as heat energy for continuous carbonization production, so that the carbonization method provided by the present invention plays an energy-saving and environmentally friendly role; in addition, a cooling device 33 is provided in the hot air furnace 3 to reduce the high-temperature hot air to a predicted temperature range that is not easy to coke, so that production can be carried out continuously; furthermore, during the carbonization process, the carbonization cylinder 11 continues to rotate and cooperates with the setting of a preset angle, so that the tobacco stem material is continuously and slowly transported from the starting end to the tail end, ensuring that the tobacco stem material is fully carbonized while ensuring continuous production.

[0096] As a preferred embodiment, the gas-solid separation chamber 2 is also provided with an exhaust port 311. When the high-temperature hot air therein still exceeds the preset temperature range under the action of the cooling device 33, the excess hot air is directly discharged from the exhaust port 311, thereby ensuring that the hot air entering the carbonization cylinder 11 is not easy to coke and is at a temperature suitable for carbonization.

[0097] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A carbonization system, It is characterized in that include: The carbonization device comprises a carbonization cylinder and a hot air conveying pipeline arranged in the carbonization cylinder, wherein the carbonization cylinder is rotatable around its central axis; a material input port is arranged at the head end of the carbonization cylinder, a processed material discharge port is arranged at the tail end, and the central axis is arranged at a preset angle with the installation horizontal plane; A gas-solid separation chamber is connected to the treated material discharge port, and is provided with a pyrolysis gas discharge port at the top and a carbide discharge port at the bottom; A hot blast furnace, comprising a furnace body and a burner connected thereto; the furnace body and the gas-solid separation chamber are arranged on the same wall, and the burner is adjacently connected to the pyrolysis gas outlet, and is used to burn the pyrolysis gas separated from the gas-solid separation chamber to generate high-temperature hot blast; the furnace body is also connected to a cooling device, which is used to reduce the temperature of the hot blast generated by the combustion of the pyrolysis gas; The hot air delivery duct passes through the gas-solid separation chamber and is in communication with the furnace body, and is used to transmit the hot air reduced to a preset temperature into the carbonization cylinder to provide heat energy for carbonization of the material.

2. A carbonization system according to claim 1, It is characterized in that The furnace body is provided with an exhaust port, and an exhaust control valve is provided at the exhaust port; A temperature detection device is also provided in the furnace body, and the temperature detection device is communicatively connected with the exhaust control valve, and is used for exhausting excess hot air in the hot air furnace to control the carbonization temperature in the carbonization cylinder.

3. A carbonization system according to claim 2, It is characterized in that The carbonization cylinder is provided with an exhaust gas discharge device near the head end, which is used to discharge the hot air after heat exchange and temperature reduction by the carbonization device; The tail gas exhaust device is also connected to the exhaust control valve through a hot air bypass pipe, and is used to exhaust excess hot air in the hot air furnace.

4. A carbonization system according to any one of claims 1 to 3, It is characterized in that The carbonization device also includes a rotation driving device, which is drivingly connected to the carbonization cylinder and is used to drive the carbonization cylinder to rotate.

5. A carbonization system according to claim 4, It is characterized in that The rotary drive device includes an active friction drive device, which includes a drive motor-reducer, a first active friction wheel drivingly connected to the drive motor-reducer, and a first driven friction wheel arranged on the outer wall of the carbonized cylinder and pressed tightly with the first active friction wheel.

6. A carbonization system according to claim 5, It is characterized in that The rotary drive device also includes a follower friction drive device, which includes a second active friction wheel, a second driven friction wheel arranged on the outer wall of the carbonized cylinder and pressed against the second active friction wheel, and the first driven friction wheel and the second driven friction wheel are arranged on the outer wall of the carbonized cylinder at intervals.

7. A carbonization system according to claim 3, It is characterized in that The head end of the carbonization cylinder is connected to a waste gas smoke chamber, and the waste gas smoke chamber is connected to the tail gas exhaust device to discharge the waste gas generated during the carbonization process of the material; The exhaust gas chamber is sealed and connected to the head end of the carbonization cylinder through a head seal; The tail end of the carbonization cylinder body is hermetically connected to the gas-solid separation chamber through a tail seal.

8. A carbonization system according to claim 7, wherein, One end of the hot air conveying pipeline is fixedly connected to the waste gas smoke chamber, and the other end passes through the carbonization cylinder body, the gas-solid separation chamber and communicates with the hot blast stove, and is fixedly connected to the gas-solid separation chamber.

9. A carbonization system according to any one of claims 1-3, wherein, The gas-solid separation chamber includes a separation chamber body, a pyrolysis gas pipe arranged at the top of the separation chamber body, a cooling spiral communicated with the bottom of the separation chamber body, and a discharge valve connected to the cooling spiral; The pyrolysis gas pipe is connected to the burner; One side wall of the separation chamber body communicates with the tail end of the carbonization cylinder body, and its opposite side wall is arranged in common with the furnace body.

10. A carbonization method of a carbonization system according to any one of claims 1-9, wherein, Its steps include: S1: Keep the carbonization cylinder body rotating, the burner of the hot blast stove is connected to an external combustion gas to generate high-temperature hot air, and at the same time start the cooling device of the hot blast stove to reduce the high-temperature hot air to the predicted temperature range; S2: The hot air reaching the preset temperature range is conveyed into the carbonization cylinder body through the hot air conveying pipeline to heat the materials arranged in the carbonization cylinder body; S3: The products during the carbonization process enter the gas-solid separation chamber for gas-solid separation, the separated pyrolysis gas is connected to the burner for combustion to generate high-temperature hot air, and at the same time the external combustion gas is closed, and the cooling device of the hot blast stove continuously reduces the high-temperature hot air to the predicted temperature range; The separated solid carbon is discharged from the bottom of the gas-solid separation chamber; repeat steps S2 and S3 until the material carbonization is completed.

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