Electromagnetic heating type carbon gasification system

Abstract

This invention relates to the technical field of biomass and high-calorific-value solid waste material treatment, and provides an electromagnetic heating carbonization gasification system, including a carbonization gasification device. The carbonization gasification device includes: a carbonization gasification tube, including a first end and a second end along the axial direction, the first end being provided with a feed inlet, and the second end being provided with a solid product outlet and a gaseous product outlet; a mandrel, coaxially disposed inside the carbonization gasification tube, with a conical head at the end facing the feed inlet; a sandwich cavity is formed between the mandrel and the inner wall of the carbonization gasification tube; an electromagnetic heating device, including an excitation power supply and an excitation coil disposed on the outer periphery of the carbonization gasification tube; and a sealed feeding device, the discharge end of which is connected to the feed inlet of the carbonization gasification tube. This configuration reduces the requirements for moisture and particle size of the carbonized material, thereby increasing the carbonization material processing capacity and carbonization gasification capacity. In addition, the electromagnetic heating method enables precise control of the carbon gas temperature, avoiding the problem of waste gas generated by the combustion of combustible or auxiliary fuels during the carbonization process.

Description

Technical Field

[0001] This invention relates to the technical field of biomass and high-calorific-value solid waste treatment, and in particular to an electromagnetic heating carbonization system. Background Technology

[0002] Biomass oxygen-free (or oxygen-deprived) carbonization, also known as biomass dry distillation technology, refers to the process of heating biomass feedstock in an oxygen-free or low-oxygen environment to decompose the organic matter, ultimately leaving behind a residue based on fixed carbon (i.e., biochar). During this process, non-carbonaceous substances in the biomass feedstock are removed, generating large amounts of volatiles and bio-oil, while simultaneously producing biochar.

[0003] The relatively mature and widely used oxygen-free (absolute) carbonization process at present is mainly the carbon gasification process route based on the drum-type carbonization device. The main feature of this process is that a box-type insulated heating furnace is set outside the rotating drum. The outer wall of the drum is directly heated by combustible gas or auxiliary fuel. The material inside the drum is dry distilled and cracked through heat transfer through the drum wall to generate carbon and combustible gas. The flue gas generated by combustion is cooled and purified by a heat exchange device before being discharged into the atmosphere.

[0004] However, among the aforementioned technologies, the drum-type carbonization gasification device has high requirements for the moisture content (≤15%) and particle size (≤20mm) of the carbonized material, which leads to increased material pretreatment and procurement costs. In addition, the rotating carbonization drum suffers from reduced strength and shortened service life due to alternating stress under high-temperature heating. Summary of the Invention

[0005] This invention provides an electromagnetic heating carbon gasification system to solve the defects of existing carbon gasification devices, which have high requirements for the moisture and particle size of carbonized materials and short service life. It can reduce the requirements for the moisture and particle size of carbonized materials, improve the carbonized material processing capacity and carbon gasification capacity, and is not affected by alternating stress during operation, thus having a longer service life.

[0006] This invention provides an electromagnetic heating carbon gasification system, including a carbon gasification device;

[0007] The carbonization device includes:

[0008] The carbon gasification pipe includes a first end and a second end along the axial direction. The first end is provided with a feed inlet, and the second end is provided with a solid product outlet and a gaseous product outlet.

[0009] A mandrel is coaxially disposed inside the carbon gasification pipe, and a conical head is provided at one end facing the feed inlet; a jacket cavity for material to pass through is formed between the mandrel and the inner wall of the carbon gasification pipe.

[0010] An electromagnetic heating device includes an excitation power supply and an excitation coil disposed on the outer periphery of the carbonization tube, for heating the tube wall of the carbonization tube;

[0011] A sealed feeding device, the discharge end of which is connected to the inlet of the carbonization pipe.

[0012] According to an electromagnetic heating carbon gasification system provided by the present invention, the sealed feeding device includes a sealed feeding screw, and the carbon gasification pipe is arranged coaxially with the feeding sealed screw.

[0013] According to an electromagnetic heating carbon gasification system provided by the present invention, the discharge end of the sealed feeding screw is provided with a first cavity section of a preset length.

[0014] According to an electromagnetic heating carbonization system provided by the present invention, the mandrel and the carbonization tube are detachably connected.

[0015] According to the electromagnetic heating carbon gasification system provided by the present invention, a cooling conveying device and a carbon bin are also included.

[0016] The inlet end of the cooling conveying device is connected to the outlet of the solid product, and the outlet end is connected to the carbon bin, which is used to cool the solid product discharged from the carbon gasification pipe and convey it to the carbon bin for storage.

[0017] According to the electromagnetic heating carbon gasification system provided by the present invention, it further includes a dust removal module, a dust conveying module, and a carbon powder bin;

[0018] The gas inlet of the dust removal module is connected to the gaseous product outlet, and the dust outlet is connected to the carbon powder bin via the dust conveying module.

[0019] According to an electromagnetic heating carbon gasification system provided by the present invention, the dust removal module includes a cooling dust removal device;

[0020] The cooling and dust removal device includes a tower body and a heat exchange tube disposed within the tower body; the top of the tower body is provided with an air inlet, the bottom of the tower body is provided with an air outlet and a first carbon powder collection hopper, and an expansion section is provided between the air inlet of the tower body and the first carbon powder collection hopper; the heat exchange tube is connected to a circulating cooling module.

[0021] The dust conveying module includes a first carbon powder conveying screw, the feed end of which is connected to the first carbon powder collecting hopper, and the discharge end of which is connected to the carbon powder bin.

[0022] According to an electromagnetic heating carbon gasification system provided by the present invention, an exhaust chamber is provided between the tower body and the first carbon powder collection hopper. The exhaust chamber is arranged coaxially with the tower body, and the flow cross-section of the exhaust chamber is larger than the flow cross-section of the tower body. The connection between the exhaust chamber and the tower body is covered with a flow equalization perforated plate.

[0023] According to the present invention, an electromagnetic heating carbon gasification system is provided, wherein the dust removal module includes a bag filter; the air inlet of the bag filter is connected to the air outlet of the cooling dust removal device, and a second carbon powder collection hopper is provided at the bottom of the bag filter;

[0024] The dust conveying module includes a second carbon powder conveying screw, the feed end of which is connected to the second carbon powder collecting hopper, and the discharge end of which is connected to the carbon powder bin.

[0025] According to the electromagnetic heating carbon gasification system provided by the present invention, a tar treatment device is further included. One end of the tar treatment device is provided with an air inlet and the other end is provided with an air outlet. The air inlet of the tar treatment device is connected to the gaseous product outlet, and the air outlet is connected to the dust removal module.

[0026] The tar treatment device includes multiple heating tubes arranged in parallel and an excitation coil disposed on the outer periphery of the heating tubes. The excitation coil is electrically connected to the excitation power supply. One end of each of the multiple heating tubes is connected to the air inlet of the tar treatment device, and the other end is connected to the air outlet of the tar treatment device.

[0027] According to an electromagnetic heating carbon gasification system provided by the present invention, the inner diameter of the carbon gasification pipe gradually expands from the first end to the second end.

[0028] According to an electromagnetic heating carbonization system provided by the present invention, the feed end of the sealed feeding screw is connected to a buffer hopper.

[0029] According to an electromagnetic heating carbon gasification system provided by the present invention, the second end of the carbon gasification pipe is connected to a carbon collection hopper and a combustible gas collection box; the carbon collection hopper is located below the collection box; the solid product outlet is located at the bottom of the carbon collection hopper, and the gaseous product outlet is located at the top of the combustible gas collection box.

[0030] According to an electromagnetic heating carbon gasification system provided by the present invention, the cooling conveying device includes a water-cooled spiral and a circulating cooling module;

[0031] The feed end of the water-cooled spiral is connected to the outlet of the solid product, and the discharge end is connected to the carbon bin; the circulating cooling module is connected to the coolant inlet and coolant outlet of the water-cooled spiral.

[0032] According to the electromagnetic heating carbon gasification system provided by the present invention, the circulating cooling module includes:

[0033] The heat exchanger is provided with a medium inlet, a medium outlet, a cooling water inlet, and a cooling water outlet; the medium outlet is used for the intake of cooling medium and the outlet is used for the discharge of heating medium; the cooling water inlet is used for the intake of heating cooling water and the cooling water outlet is used for the discharge of cooling water.

[0034] A closed water tank, connected to the cooling water outlet, is used to store cooling water;

[0035] A water pump, connected to the enclosed water tank, is used to pump cooling water.

[0036] According to an electromagnetic heating carbon gasification system provided by the present invention, a first vibrator is provided on the first carbon powder collection hopper.

[0037] According to an electromagnetic heating carbon gasification system provided by the present invention, the discharge end of the first carbon powder conveying screw is provided with a second cavity section of a preset length.

[0038] According to an electromagnetic heating carbon gasification system provided by the present invention, a third vibrator is provided on the second carbon powder collection hopper.

[0039] According to an electromagnetic heating carbon gasification system provided by the present invention, the discharge end of the second carbon powder conveying screw is provided with a third cavity section of a preset length.

[0040] According to an electromagnetic heating carbonization system provided by the present invention, the outlet of the bag filter is connected to an induced draft fan, and the outlet of the induced draft fan is connected to a main pipeline, which is used to connect to the next process.

[0041] According to an electromagnetic heating carbon gasification system provided by the present invention, a gas flow meter is connected to the main pipeline.

[0042] According to the electromagnetic heating carbonization system provided by the present invention, it further includes an exhaust flare, wherein the main pipeline is connected to the exhaust flare via a branch pipeline.

[0043] According to an electromagnetic heating carbon gasification system provided by the present invention, the closed water tank is connected to a water supply pipe and an overflow pipe.

[0044] According to an electromagnetic heating carbonization system provided by the present invention, two water pumps are connected in parallel.

[0045] According to an electromagnetic heating carbon gasification system provided by the present invention, the circulating cooling module further includes a flow meter for detecting the flow rate of cooling water.

[0046] According to an electromagnetic heating carbon gasification system provided by the present invention, a fault discharge gate is provided on the sealed feeding screw, and the fault discharge gate is located between the feed end of the sealed feeding screw and the first motor.

[0047] The electromagnetic heating carbonization system provided by this invention, through a sealed feeding device, can transport materials into the carbonization pipe while ensuring its sealing performance. Guided by the conical head of the mandrel, the material enters the interlayer cavity formed by the inner wall of the carbonization pipe and the mandrel, causing the carbonized material to form a circumferential carbonized material layer of a certain uniform thickness along the inner wall of the pipe. The electromagnetic heating device can uniformly heat the pipe wall of the carbonization pipe, thereby achieving uniform heating of the carbonized material layer, ensuring carbonization efficiency and uniformity, reducing the requirements for moisture and particle size of the carbonized material, and improving the carbonized material processing capacity and carbonization production capacity. In addition, the use of electromagnetic heating can achieve precise control of carbon gas temperature, effectively avoiding the problem of waste gas generated by the combustion of combustible gas or auxiliary fuel during carbonization operation. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the electromagnetic heating carbonization system provided in an embodiment of the present invention.

[0050] Figure 2 This is a schematic diagram of the structure of the carbonization pipe provided in an embodiment of the present invention.

[0051] Figure 3 yes Figure 1 A magnified view of part A in the middle.

[0052] Figure 4 This is a schematic diagram of the cooling and dust removal device provided in an embodiment of the present invention.

[0053] Figure 5 yes Figure 4 Cross-sectional view of the intermediate cooling and dust removal device along the BB direction.

[0054] Figure 6 This is one of the structural schematic diagrams of the bag filter dust collector provided in the embodiments of the present invention.

[0055] Figure 7 This is the second structural schematic diagram of the bag filter dust collector provided in the embodiment of the present invention.

[0056] Figure 8 This is a schematic diagram of the tar treatment device provided in an embodiment of the present invention.

[0057] Figure 9 yes Figure 8 Cross-sectional view of the medium tar processing unit along the AA direction.

[0058] Figure label:

[0059] 1. Carbon gasification pipe; 1-1. Carbon collection hopper; 1-2. Combustible gas collection box; 2. Core rod; 3. Electromagnetic heating device; 3-1. Excitation power supply; 3-2. Excitation coil; 3-3. Automatic temperature control device; 4. Sealed feeding screw; 4-1. First motor; 4-2. Shaftless screw guide vane; 4-3. First cavity section; 4-4. Fault discharge gate; 4-5. Buffer hopper; 4-6. Isolation door; 4-7. Water spray valve; 5. Feeding conveyor device; 6. Water-cooled screw; 6-1. Second motor; 6-2. Outer shell; 6-3. Screw shaft; 7. Carbon bin; 7-1. First bin wall vibrator; 8. Circulating cooling module; 8-1. Heat exchanger; 8-2. Enclosed water tank; 8-3. Water pump; 8 -4. Flow meter; 9. Carbon powder bin; 9-1. Second bin wall vibrator; 10. Cooling and dust removal device; 10-1. Tower body; 10-2. First carbon powder collection hopper; 10-3. Heat exchange tube; 10-4. Exhaust chamber; 10-5. Flow equalization orifice plate; 10-6. First vibrator; 10-7. Second vibrator; 11. First carbon powder conveying screw; 11-1. Third motor; 12. Bag dust collector; 12-1. Second carbon powder collection hopper; 12-2. Beating device; 12-3. Third vibrator; 13. Second carbon powder conveying screw; 13-1. Fourth motor; 14. Tar treatment device; 14-1. Heating tube; 15. Exhaust fan; 16. Gas flow meter; 17. Exhaust flare. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0061] To facilitate understanding of the electromagnetic heating carbon gasification system provided by this invention, its application background is first introduced. At present, the relatively mature and applied oxygen-free (absolute) carbonization process is mainly a carbon gasification process route based on a drum-type carbonization device. The main feature of this process is that a box-type insulated heating furnace is set outside the rotating drum. The outer wall of the drum is directly heated by combustible gas or auxiliary fuel. The material inside the drum is dry distilled and cracked through heat transfer through the drum wall to generate carbon and combustible gas. The flue gas generated by combustion is cooled and purified by a heat exchange device before being discharged into the atmosphere.

[0062] However, in the aforementioned technologies, due to the influence of the residence time of the material in the drum, the drum-type carbonization gasification device has high requirements for the moisture content and particle size of the carbonized material. Generally, the moisture content of the material should be ≤15% and the particle size should be ≤20mm to ensure uniform heating and sufficient carbonization. This leads to an increase in the pretreatment and procurement costs of the material. Furthermore, the aforementioned drum-type carbonization gasification device uses the combustible gas generated by carbonization to heat the drum, resulting in poor accuracy in controlling the carbon gas temperature. In addition, the rotating carbonization drum experiences a decrease in strength due to alternating stress under high-temperature heating, resulting in a shorter service life.

[0063] To address the aforementioned issues, this invention provides an electromagnetic heating carbonization system that reduces the requirements for moisture content and particle size of the carbonized materials, increases the carbonized material processing capacity and carbonization production capacity, and is unaffected by alternating stress during operation, resulting in a longer service life. Furthermore, the temperature control is more precise, improving carbonization efficiency and effectively avoiding the generation of exhaust gases from the combustion of combustible or auxiliary fuels.

[0064] The following is combined Figures 1-9 The electromagnetic heating carbon gasification system of the present invention is described. The electromagnetic heating chamber carbon gasification system provided in the embodiments of the present invention can be applied to the oxygen-free (absolute) carbon gasification of materials such as biomass and high-calorific-value industrial solid waste.

[0065] Reference Figure 1 An electromagnetic heating carbonization system includes a carbonization device; the carbonization device includes a carbonization pipe 1, a mandrel 2, an electromagnetic heating device 3, and a sealed feeding device; wherein, the carbonization pipe 1 includes a first end and a second end along the axial direction, the first end is provided with a feed inlet, and the second end is provided with a solid product outlet and a gaseous product outlet; the mandrel 2 is coaxially arranged inside the carbonization pipe 1, and the end of the mandrel 2 facing the feed inlet is provided with a conical head, and a jacket cavity for material passage is formed between the inner wall of the carbonization pipe 1 and the mandrel 2; the electromagnetic heating device 3 includes an excitation power supply 3-1 and an excitation coil 3-2 arranged on the outer periphery of the carbonization pipe 1 for heating the pipe wall of the carbonization pipe 1; the discharge end of the sealed feeding device is connected to the feed inlet of the carbonization pipe 1 for conveying carbonized material into the carbonization pipe 1 and ensuring the sealing of the carbonization pipe 1.

[0066] In a specific application scenario, a sealed feeding device can convey materials into the gasification pipe 1 while ensuring its sealing performance. Guided by the conical head of the mandrel 2, the material enters the interlayer cavity formed by the inner wall of the gasification pipe 1 and the mandrel 2, causing the carbonized material to form a circumferential carbonized material layer of a certain uniform thickness along the inner wall of the pipe. The electromagnetic heating device 3 can uniformly heat the pipe wall of the gasification pipe 1, thereby achieving uniform heating of the carbonized material layer, ensuring carbonization efficiency and uniformity, reducing the requirements for moisture and particle size of the carbonized material, and improving the carbonized material processing capacity and gasification capacity. In addition, the use of electromagnetic heating can achieve precise control of the carbon gas temperature, effectively avoiding the problem of waste gas generated by the combustion of combustible gas or auxiliary fuel during the gasification process.

[0067] Understandably, the specific material, specifications, and other parameters of the carbonization pipe 1 can be selected according to actual needs.

[0068] In one embodiment of the present invention, reference is made to Figure 1 and Figure 2 The carbon gasification pipe 1 is made of high-strength heat-resistant pipe material that is equal to or better than 310S to ensure that the carbon gasification pipe 1 can operate stably at high temperatures. The inner diameter of the carbon gasification pipe 1 gradually expands from the first end to the second end to reduce the resistance to material flow.

[0069] The first end of the carbon gasification pipe is open, forming the aforementioned feed inlet. The second end is connected to a carbon discharge collection hopper 1-1 and a combustible gas collection box 1-2. The carbon discharge collection hopper 1-1 is located below the combustible gas collection box 1-2. The carbon gasification pipe 1 is connected to both the carbon discharge collection hopper 1-1 and the combustible gas collection box 1-2. The solid product outlet is located at the bottom of the carbon discharge collection hopper 1-1. The solid product discharged through the carbon gasification pipe 1 enters the carbon discharge collection hopper 1-1 for buffering and is discharged from the solid product outlet at the bottom of the carbon discharge collection hopper 1-1. The gaseous product outlet is located at the top of the combustible gas collection box 1-2. The gaseous product discharged through the carbon gasification pipe 1 enters the combustible gas collection box 1-2 for buffering and is discharged from the gaseous product outlet at the top of the combustible gas collection box 1-2.

[0070] The sealing feeding device includes a sealing feeding screw 4, which is driven by a first motor 4-1. As a commonly used feeding device, the specific structure and working principle of the sealing feeding screw 4 can be referred to the existing technology, and will not be described in detail in this embodiment of the invention.

[0071] In this embodiment, the sealed feeding screw 4 can be a tubular high-strength shaftless screw feeder, which is equipped with shaftless screw guide vanes 4-2. The carbonization pipe 1 is coaxially arranged with the sealed feeding screw 4, and the discharge end of the sealed feeding screw 4 is connected to the inlet of the carbonization pipe 1, specifically by flange connection. The first motor 4-1 can be a variable frequency drive motor to facilitate adjustment of the feeding speed of the sealed feeding screw 4. Under the drive of the first motor 4-1, the sealed feeding screw 4 axially conveys the carbonized material into the carbonization pipe 1.

[0072] To ensure sealing performance, refer to Figure 1 and Figure 3 The discharge end of the sealed feeding screw 4 is provided with a first cavity section 4-3 of a preset length. When feeding, the carbonized material first fills the first cavity section 4-3 and forms a material seal with the material blockage of the core rod 2, preventing the combustible gas generated by the carbonized material in the carbonization pipe 1 during high-temperature dry distillation from backflowing and leaking outward. A water spray valve 4-7 is provided above the first cavity section 4-3 to ensure safety.

[0073] The sealed feeding screw 4 is equipped with a fault discharge gate 4-4 for emergency discharge in case of failure. Specifically, the fault discharge gate 4-4 is located between the first motor 4-1 and the feed end of the sealed feeding screw 4, and is normally open.

[0074] In order to achieve continuous feeding by the sealed feeding screw 4, the feed end of the sealed feeding screw 4 is connected to the buffer hopper 4-5. The electromagnetic heating carbonization system also includes a feeding conveyor 5, which is located above the buffer hopper 4-5. Specifically, a belt conveyor can be used to transport the carbonized material into the buffer hopper 4-5. The sealed feeding screw 4 continuously transports the material in the buffer hopper 4-5 to the carbonization pipe 1.

[0075] Specifically, a closable partition door 4-6 is installed between the buffer hopper 4-5 and the feed end of the feeding screw to isolate the feed during maintenance of the feeding equipment. To facilitate monitoring and control of the feeding process, a level gauge is installed on the buffer hopper 4-5, which provides a feeding signal to the feeding conveyor 5. The feeding conveyor 5 then feeds the material according to the level within the buffer hopper 4-5. Specifically, the level gauge can be of ultrasonic, infrared, or other types; this embodiment uses an infrared sensing level gauge.

[0076] In one embodiment of the present invention, the mandrel 2 is detachably connected to the carbonization tube 1. This allows for the replacement of mandrels 2 with those of different diameters according to the actual application scenario, thereby adjusting the thickness of the carbonized material layer within the interlayer cavity and ensuring carbonization efficiency.

[0077] Specifically, a flange seat is provided at the end of the gasification pipe 1 away from the feed inlet, and a flange is fixedly connected at the end of the mandrel 2 away from the conical head. The flange at the end of the mandrel 2 is connected to the flange seat at the end of the gasification pipe 1 by bolts, thereby realizing the detachable fixed connection of the mandrel 2 in the gasification pipe 1.

[0078] Of course, the connection methods between the mandrel 2 and the gasification tube 1 include, but are not limited to, the connection methods listed above. Any other connection method that allows the mandrel 2 to be detachably fixed inside the gasification tube 1 is also applicable.

[0079] In actual operation, the carbonized material is conveyed to the jacket cavity formed by the inner wall of the carbonization pipe 1 and the core rod 2 through the sealed feeding device, so that the carbonized material forms a circumferential carbonized material layer of a certain uniform thickness along the inner wall of the pipe. Then, the uniform heating of the pipe wall of the carbonization pipe 1 is achieved by the electromagnetic heating device 3.

[0080] The electromagnetic heating device 3 is a device that converts electrical energy into heat energy using the principle of electromagnetic induction. The excitation power supply 3-1 is used to provide high-frequency alternating current. The excitation coil 3-2 is wound around the outer periphery of the carbon gasification tube 1. When the high-frequency alternating current is transmitted to the excitation coil 3-2 through the wire, a changing magnetic field is generated in the excitation coil 3-2. The excitation coil 3-2 induces eddy currents in the carbon gasification tube 1, thereby achieving heating.

[0081] To facilitate temperature control, an automatic temperature control device 3-3 can be installed to monitor and control the temperature during the heating process, ensuring that the temperature inside the carbonization tube 1 reaches and is maintained within the set temperature range. Specifically, the automatic temperature control device 3-3 can employ a temperature feedback mechanism consisting of a temperature sensor and a controller, combined with a PID control algorithm, to achieve precise temperature control and ensure the stability and reliability of the heating process.

[0082] It should be noted that the above is only a brief description of the structure and principle of the electromagnetic heating device 3. For more specific structures and working principles, please refer to the existing technology. It will not be described again in the embodiments of this invention.

[0083] In one embodiment of the present invention, the carbonization pipe 1 is provided with a preheating section, a volatilization carbonization section, and a discharge section from the first end to the second end. The carbonized material enters the preheating section for preheating under the conveying of the sealed feeding device, then carbonizes in the volatilization carbonization section, and finally discharges the carbonized material and combustible gas through the discharge section. The temperatures of the preheating section, the volatilization carbonization section, and the discharge section can be individually controlled by the automatic temperature control device 3-3.

[0084] In one embodiment of the present invention, the electromagnetic heating carbon gasification system further includes a cooling conveying device and a carbon bin 7; wherein, the feed end of the cooling conveying device is connected to the solid product outlet at the bottom of the carbon collection hopper 1-1, and the discharge end of the cooling conveying device is connected to the carbon bin 7; the cooling conveying device is used to cool the solid product discharged from the carbon gasification pipe 1 and convey it to the carbon bin 7 for storage.

[0085] The cooling conveying device includes a water-cooled spiral 6 and a circulating cooling module 8. The water-cooled spiral 6 is driven by a second motor 6-1. Specifically, the second motor 6-1 can be a variable frequency drive motor to adjust the discharge speed of the water-cooled spiral 6. The feed end of the water-cooled spiral 6 is connected to the solid product outlet, and the discharge end is connected to the charcoal bin 7. Driven by the second motor 6-1, the water-cooled spiral 6 conveys the solid product to the charcoal bin 7 for storage. The circulating cooling module 8 is connected to the coolant inlet and coolant outlet of the water-cooled spiral 6.

[0086] Specifically, the water-cooled spiral 6 generally includes a jacketed outer shell 6-2 and a spiral shaft 6-3 with spiral guide vanes; the outer shell 6-2 forms a shell side and a tube side, and the spiral shaft 6-3 is rotatably supported in the tube side of the outer shell 6-2, forming a channel for transporting materials, and the second motor 6-1 is drivenly connected to the spiral shaft 6-3; while the shell side forms a flow channel for coolant to pass through, and the coolant inlet and coolant outlet are both connected to the shell side of the outer shell 6-2, wherein the coolant inlet is arranged near the discharge end of the water-cooled spiral 6, and the coolant outlet is arranged near the feed end of the water-cooled spiral 6.

[0087] Specifically, the spiral shaft 6-3 is a tubular shaft with internal channels for coolant to pass through. Rotary joints are connected to both ends of the spiral shaft 6-3. The coolant outlet on the outer shell 6-2 is connected to the spiral joint near the feed end. The coolant can enter the spiral shaft 6-3 through the spiral joint at the feed end and be discharged from the spiral joint at the other end to form a circulation, further improving the cooling efficiency of the material.

[0088] Specifically, temperature measuring points are set on both the coolant side and the material side of the water-cooled spiral 6. The temperature feedback provided by the temperature measuring points, combined with the controller and PID control algorithm, forms a temperature feedback mechanism to adjust the coolant volume and the speed of the spiral shaft 6-3, thereby achieving precise temperature control.

[0089] The water-cooled spiral 6 is driven by the second motor 6-1 to transport the solid material buffered in the charcoal collection hopper 1-1 to the charcoal bin 7 for storage. To ensure safety, the charcoal bin 7 can be equipped with auxiliary safety facilities such as a level gauge, thermometer, explosion-proof door, dust collector, and fire sprinkler pipe. The bottom of the charcoal bin 7 is equipped with a discharge door and a first bin wall vibrator 7-1 for convenient material discharge.

[0090] Specifically, a level gauge is installed on the charcoal collection hopper 1-1. The level gauge is used to provide a level signal to the controller. The controller adjusts the rotation speed of the water-cooled spiral 6 according to the material height in the charcoal collection hopper 1-1, so as to adjust the material conveying speed of the water-cooled spiral 6 and maintain a certain material level in the charcoal collection hopper 1-1 to maintain a seal.

[0091] Specifically, an openable and closable isolation door is provided between the coal collection hopper 1-1 and the feed end of the water-cooled spiral 6 for feeding isolation during maintenance of the feeding equipment.

[0092] It should be noted that the above description is only a brief overview of the structure and principle of the water-cooled spiral 6. As a commonly used material conveying device, the more specific structure and working principle of the water-cooled spiral 6 can be found in existing technologies, and will not be elaborated upon in this embodiment of the invention.

[0093] The circulating cooling module 8 provided in the embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0094] Reference Figure 1 The circulating cooling module 8 includes a heat exchanger 8-1, a closed water tank 8-2, and a water pump 8-3. The heat exchanger 8-1 can be a conventional finned or other type of heat exchanger. In this embodiment, to improve heat exchange efficiency, the heat exchanger 8-1 is equipped with a medium inlet, a medium outlet, a cooling water inlet, and a cooling water outlet. The medium inlet is for the inflow of a cooling medium, such as cold water, and the medium outlet is for the discharge of the heated medium after heat exchange. The cooling water inlet is for the inflow of heated cooling water, and the cooling water outlet is for the discharge of cooled cooling water. The medium and cooling water exchange heat within the heat exchanger 8-1, cooling the cooling water, while the residual heat in the heated medium can be recovered. The closed water tank 8-2 is connected to the cooling water outlet of the heat exchanger 8-1 and is used to store cooling water. The water pump 8-3 is connected to the closed water tank 8-2 and is used to provide power for the circulation of cooling water.

[0095] In one embodiment of the present invention, the outlet of the water pump 8-3 is connected to the coolant inlet of the water-cooled spiral 6, and the rotary joint near the discharge end of the water-cooled spiral 6 is connected to the cooling water inlet of the heat exchanger 8-1. Driven by the water pump 8-3, cold cooling water flows into the water-cooled spiral 6 to cool the solid product, while hot cooling water enters the heat exchanger 8-1 to exchange heat and cool down.

[0096] In one embodiment of the present invention, the cooling water is softened water to avoid the formation of scale; the closed water tank 8-2 is connected to a water supply pipe and an overflow pipe, the water supply pipe is used to supply water to the closed water tank 8-2, and the overflow pipe is used for safety protection when the water level is abnormal.

[0097] In one embodiment of the present invention, two water pumps 8-3 are connected in parallel, with the two water pumps 8-3 serving as backups for each other, to ensure the stability of the cooling module operation.

[0098] In one embodiment of the present invention, the water pump 8-3 can be driven by a variable frequency motor, and detection components such as thermometers, pressure sensors, and flow meters 8-4 can be installed on the pipeline of the circulating cooling module 8 to realize variable frequency adjustment of cooling water volume through parameter signals such as temperature, pressure, and flow.

[0099] Reference Figure 1 The electromagnetic heating carbon gasification system also includes a dust removal module, a dust conveying module, and a carbon powder silo 9. The gas inlet of the dust removal module is connected to the outlet of the gaseous product, and the dust outlet is connected to the carbon powder silo 9 via the dust conveying module. The dust removal module removes dust from the gaseous product, purifying it for use in subsequent processes. The dust conveying module transports the removed dust to the carbon powder silo 9 for storage.

[0100] Specifically, refer to Figure 4 and Figure 5 The dust removal module includes a cooling dust removal device 10; the cooling dust removal device 10 includes a tower body 10-1 and a heat exchange tube 10-3 disposed in the tower body 10-1; the top of the tower body 10-1 is provided with an air inlet, the bottom is provided with an air outlet and a first carbon powder collection hopper 10-2, and an expansion section is provided between the air inlet of the tower body 10-1 and the first carbon powder collection hopper 10-2. After the gaseous product flows through the expansion section, the flow velocity will decrease, and some of the dust in the gaseous product will settle at a loss; the heat exchange tube 10-3 is connected to the circulating cooling module 8. The decrease in flow velocity can prolong the residence time of the gaseous product in the tower body 10-1, and the cooling and heat exchange are sufficient.

[0101] It is understandable that during the flow of gaseous products within tower 10-1, they will tend to move along the path of least resistance. In other words, gaseous products will tend to flow towards the outlet side of tower 10-1, causing flow deviation and affecting heat exchange and dust settling.

[0102] To address the aforementioned issues, an exhaust chamber 10-4 is provided between the tower body 10-1 and the first carbon powder collection hopper 10-2. The exhaust chamber 10-4 is coaxially arranged with the tower body 10-1, and its flow cross-section is larger than that of the tower body 10-1. A flow equalization perforated plate 10-5 covers the connection between the exhaust chamber 10-4 and the tower body 10-1. The flow equalization perforated plate reduces the flow velocity of the gaseous products, causing dust to settle at a loss within the tower body 10-1. Furthermore, it balances the resistance within the tower body 10-1, effectively preventing flow deviation and promoting heat exchange and dust settling.

[0103] Specifically, the heat exchange tube 10-3 is a serpentine tube extending from the bottom to the top of the tower body 10-1. The inlet of the heat exchange tube 10-3 is located at the bottom of the tower body 10-1 and is connected to the outlet of the water pump 8-3. The outlet is located at the top of the tower body 10-1 and is connected to the heat exchanger 8-1. Driven by the water pump 8-3, cold cooling water flows into the heat exchange tube 10-3, and the gaseous products come into contact with the heat exchange tube 10-3 and are cooled as they flow through it.

[0104] The dust conveying module includes a first carbon powder conveying screw 11, which is driven by a third motor 11-1. The feed end of the first carbon powder conveying screw 11 is connected to the first carbon powder collecting hopper 10-2, and the discharge end is connected to the carbon powder bin 9.

[0105] The first carbon powder conveying screw 11 can transport the sediment buffered in the first carbon powder collection hopper 10-2 to the carbon powder silo 9 for storage. To ensure safety, the carbon powder silo 7 can be equipped with auxiliary safety facilities such as a level gauge, thermometer, explosion-proof door, dust collector, and fire sprinkler pipe. The bottom of the carbon powder silo 9 is equipped with a discharge door and a second silo wall vibrator 9-1 for convenient discharge.

[0106] Specifically, the first charcoal powder conveying screw 11 can be a tubular screw, using a shaftless screw conveying method. The discharge end of the first charcoal powder conveying screw 11 is provided with a second cavity section of preset length. During discharge, the material accumulates in the second cavity section to form a material plug, preventing bidirectional gas leakage. A level gauge is connected to the first charcoal powder collecting hopper 10-2, and the third motor 11-1 can be a variable frequency drive motor, so as to adjust the conveying speed of the first charcoal powder conveying screw 11 according to the height of the charcoal powder in the first charcoal powder collecting hopper 10-2.

[0107] In one embodiment of the present invention, a first vibrator 10-6 is provided at the bottom of the tower body 10-1 near the air outlet. The first vibrator 10-6 is used to vibrate and clean the deposits settled on the windward side of the serpentine heat exchange tube 10-3, maintaining a stable heat exchange effect. A second vibrator 10-7 is fixedly connected to the first carbon powder collection hopper 10-2. The second vibrator 10-7 is used to vibrate the first carbon powder collection hopper 10-2, so that the carbon powder in the first carbon powder collection hopper 10-2 can be discharged smoothly.

[0108] Depending on their working principles, the first vibrator 10-6 and the second vibrator 10-7 can be mechanical vibrators, electromagnetic vibrators, or pneumatic vibrators, etc. The specific type can be selected according to actual needs.

[0109] In one embodiment of the present invention, reference is made to Figure 6 and Figure 7The dust removal module also includes a bag filter 12; the air inlet of the bag filter 12 is connected to the air outlet of the cooling dust removal device 10, and a second carbon powder collection hopper 12-1 is provided at the bottom of the bag filter 12; the dust conveying module includes a second carbon powder conveying screw 13, which is driven by a fourth motor 13-1, the feed end of the second carbon powder conveying screw 13 is connected to the second carbon powder collection hopper 12-1, and the discharge end is connected to the carbon powder bin 9.

[0110] In practical operation, in addition to settling the dust in the gaseous product, the cooling dust removal device 10 can also cool the gaseous product to the suitable temperature range of the bag filter dust removal device 12. The cooled gaseous product enters the bag filter dust removal device 12 from the air inlet, is filtered by the filter bag, and is discharged from the air outlet of the bag filter dust removal device 12, thereby achieving further purification of the gaseous product and meeting the needs of subsequent processes.

[0111] The bag filter dust collector 12 is a commonly used gas purification device. Its specific structure and working principle can be referred to the existing technology, and will not be described in detail in the embodiments of this invention.

[0112] In this embodiment, the bag filter 12 is a positive pressure bag filter, where dust-laden combustible gas is filtered from the inside of the filter bag to the outside. The bag filter 12 is equipped with a beating device 12-2, which beats the filter bag. Dust on the filter bag is beaten by the beating device 12-2 and falls into the second carbon powder collection hopper 12-1. The second carbon powder conveying screw 13 then conveys the carbon powder buffered in the second carbon powder collection hopper 12-1 to the carbon powder silo 9.

[0113] Specifically, the beating device 12-2 uses a mechanical beater to knock the dust into the bottom hopper, avoiding the use of nitrogen blowing to reduce the calorific value of combustible gas.

[0114] The second charcoal powder conveying screw 13 can be a tubular screw, using a shaftless screw conveying method. The discharge end of the second charcoal powder conveying screw 13 is provided with a third cavity section of preset length. During discharge, the material accumulates in the third cavity section to form a material plug, preventing bidirectional gas leakage. A level gauge is connected to the second charcoal powder collecting hopper 12-1. The fourth motor 13-1 can be a variable frequency drive motor, so as to adjust the conveying speed of the second charcoal powder conveying screw 13 according to the height of the charcoal powder in the second charcoal powder collecting hopper 12-1.

[0115] In one embodiment of the present invention, a third vibrator 12-3 is fixedly connected to the second carbon powder collecting hopper 12-1. The third vibrator 12-3 is used to vibrate the second carbon powder collecting hopper 12-1 so that the carbon powder in the second carbon powder collecting hopper 12-1 can be discharged smoothly.

[0116] Depending on the different working principles, the third vibrator 12-3 can be a mechanical vibrator, an electromagnetic vibrator, or a pneumatic vibrator, etc. The specific type can be selected according to actual needs.

[0117] In practice, the gaseous products generated by the carbonization of materials in the range of 500~600℃ contain tar substances. The tar substances and carbon dust carried in the combustible gas are prone to condensation and adhesion during pipeline transportation, leading to pipeline blockage.

[0118] To solve the above problems, refer to Figure 8 and Figure 9 The electromagnetic heating carbon gasification system also includes a tar treatment device 14. One end of the tar treatment device 14 is provided with an air inlet and the other end is provided with an air outlet. The air inlet of the tar treatment device 14 is connected to the gaseous product outlet, and the air outlet is connected to the dust removal module.

[0119] The tar treatment device 14 includes multiple heating tubes 14-1 arranged in parallel and an excitation coil 3-2 disposed on the outer periphery of the heating tubes 14-1. The excitation coil 3-2 is electrically connected to the excitation power supply 3-1. One end of each of the multiple heating tubes 14-1 is connected to the air inlet of the tar treatment device 14, and the other end is connected to the air outlet of the tar treatment device 14.

[0120] In actual operation, the gaseous products discharged from the gaseous product outlet enter the tar treatment device 14 through the gas inlet end. The heating tube 14-1 with excitation coil 3-2 can reheat the tar-containing gaseous products to 750~950℃, which can decompose large molecular materials such as tar into small molecular non-condensable gaseous substances at high temperature. This effectively solves the problem of pipeline blockage caused by tar and can improve the calorific value of combustible gas.

[0121] Specifically, the temperature of the heating element 14-1 can be controlled by the automatic temperature control device 3-3.

[0122] Specifically, one end of the tar treatment device 14 is connected to an inlet flange, which is connected to the outlet of the gaseous product. The gaseous product is diverted to multiple parallel heating tubes 14-1 through the inlet flange. The multiple parallel heating tubes 14-1 can increase the heat exchange area and improve the tar cracking efficiency. The other end of the tar treatment device 14 is connected to an outlet flange, which is connected to the inlet of the cooling and dust removal device 10. The gaseous product after cracking by the multiple heating tubes 14-1 is combined and transported to the cooling and dust removal device 10 through the outlet flange for cooling and dust removal.

[0123] In one embodiment of the present invention, the outlet of the bag filter 12 is connected to an induced draft fan 15 for drawing out gaseous products. The outlet of the induced draft fan 15 is connected to a main pipeline for connecting to the next process. A gas flow meter 16 is connected to the main pipeline for measuring the gaseous products. The main pipeline is connected to an exhaust flare 17 through a branch pipeline. During the start-up phase, gaseous products with unqualified calorific value are burned and discharged into the atmosphere by the exhaust flare 17. After the gaseous products are qualified, the exhaust flare 17 is closed, and the gaseous products are transported to the next process through the main pipeline.

[0124] In one embodiment of the present invention, the controller may be a PLC (Programmable Logic Controller) or a DCS (Distributed Control System).

[0125] In actual operation, the circulating cooling module 8 is started first to ensure the normal operation of the cooling conveying device and the cooling dust removal device 10. The controller adjusts the working status of the water pump 8-3 through the feedback of water temperature and flow signals to control the circulating water volume to meet the cooling requirements.

[0126] The feeding and conveying device 5 feeds material into the buffer hopper 4-5 to a certain level. When the material level in the buffer hopper 4-5 is lower than the set level, the feeding and conveying device 5 automatically replenishes the material. At the same time as feeding, the electromagnetic heating device 3 is started to heat the carbon gasification pipe 1 and the tar treatment device 14. When the carbon gasification pipe 1 and the tar treatment device 14 reach the set temperature, the partition door 4-6 is opened and the sealed feeding screw 4 is started. The speed of the sealed feeding screw 4 is controlled by the controller to transport the carbonized material into the carbon gasification pipe 1 at a specific feeding speed for high-temperature carbon gasification reaction. The gaseous product is drawn out by the induced draft fan 15. By adjusting the speed of the induced draft fan 15, the pipeline system can be maintained at 0 pressure or slightly positive pressure (within +100pa). During the start-up phase, the main pipeline is closed and the branch pipeline is opened. Unqualified gaseous products are discharged to the vent flare 17 for combustion treatment. After the gaseous products are qualified, the main pipeline is opened and the branch pipeline is closed. The gaseous products are transported to the next process for normal gas supply by the main pipeline.

[0127] When the material level in the charcoal collection hopper 1-1 reaches the preset value, the controller opens the isolation door and controls the water-cooled spiral 6 to rotate at a certain speed via the second motor 6-1, maintaining a certain material level in the first charcoal powder collection hopper 10-2 to keep it sealed. The discharged solid product is transported to the charcoal bin 7 for temporary storage. The gaseous product is discharged to the tar treatment device 14 through the gaseous product outlet. The heating tube with the excitation coil 3-2 can reheat the tar-containing gaseous product to 750~950℃, breaking down large molecules such as tar into small non-condensable gaseous substances at high temperature. This solves the pipeline blockage problem while improving the quality of the gaseous product. The temperature of the heating tube can be adjusted according to the tar content at the outlet.

[0128] When the material level in the second charcoal powder collecting hopper 12-1 reaches the set level, the first charcoal powder conveying screw 11 is activated to convey the charcoal powder in the second charcoal powder collecting hopper 12-1 to the charcoal powder silo 9; when the material level in the fourth collecting hopper reaches the set level, the second charcoal powder conveying screw 13 is activated to convey the charcoal powder in the fourth collecting hopper to the charcoal powder silo 9; the rotation speed of the first charcoal powder conveying screw 11 and the second charcoal powder conveying screw 13 can be adjusted according to the material levels in the second charcoal powder collecting hopper 12-1 and the fourth collecting hopper to adjust the discharge speed.

[0129] When the electromagnetic heating carbonization system is shut down, empty the carbonized material in the buffer hopper 4-5, close the isolation door 4-6, and stop the operation of the sealing feed screw 4 when the operating current drops back to the no-load current. Turn off the electromagnetic heating device 3, and then sequentially stop the water-cooled screw 6, the first carbon powder conveying screw 11, and the second carbon powder conveying screw 13, and close the corresponding feed valves. Close the main pipeline and open the branch pipeline to discharge and burn the unqualified gaseous products from the shutdown stage. When a negative pressure appears in the pipeline and the temperature in the carbonization pipe 1 cools down to near room temperature, turn off the induced draft fan 15 and the circulating cooling module 8, and turn off the exhaust flare 17 to isolate the entire electromagnetic heating carbonization system from the outside air.

[0130] It is understood that, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0131] The electromagnetic heating carbonization system provided in this invention allows for the feeding of materials into the carbonization pipe 1 while ensuring its sealing performance, thanks to a sealed feeding device. Guided by the conical head of the mandrel 2, the material enters the interlayer cavity formed by the inner wall of the carbonization pipe 1 and the mandrel 2, creating a circumferential carbonized material layer of uniform thickness along the inner wall of the pipe. The electromagnetic heating device 3 can uniformly heat the pipe wall of the carbonization pipe 1, thus achieving uniform heating of the carbonized material layer. This ensures carbonization efficiency and uniformity, reduces the requirements for moisture and particle size of the carbonized material, and improves the carbonized material processing capacity and carbonization production capacity. Furthermore, the electromagnetic heating method enables precise control of the carbon gas temperature, effectively avoiding the problem of waste gas generated by the combustion of combustible or auxiliary fuels during carbonization operation.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnetic heating type carbon gasification system, characterized in that, Including carbon gasification equipment; The carbonization device includes: The carbon gasification pipe (1) includes a first end and a second end along the axial direction. The first end is provided with a feed inlet, and the second end is provided with a solid product outlet and a gaseous product outlet. The mandrel (2) is coaxially disposed inside the carbon gasification pipe (1), and a conical head is provided at one end facing the feed inlet; a sandwich cavity for material to pass through is formed between the mandrel (2) and the inner wall of the carbon gasification pipe (1); The electromagnetic heating device (3) includes an excitation power supply (3-1) and an excitation coil (3-2) disposed on the outer periphery of the carbon gasification tube (1) for heating the tube wall of the carbon gasification tube (1); A sealed feeding device, the discharge end of which is connected to the inlet of the carbonization pipe (1); The sealed feeding device includes a sealed feeding screw (4), the carbon gasification pipe (1) is coaxially arranged with the sealed feeding screw (4), and the discharge end of the sealed feeding screw (4) is provided with a first cavity section (4-3) of a preset length.

2. The electromagnetic heating carbonization system according to claim 1, characterized in that, The mandrel (2) is detachably connected to the carbonization pipe (1).

3. The electromagnetic heating carbonization system according to claim 1, characterized in that, It also includes a cooling conveyor and a charcoal bin (7); The inlet end of the cooling conveying device is connected to the outlet of the solid product, and the outlet end is connected to the carbon bin (7), which is used to cool the solid product discharged from the carbon gasification pipe (1) and convey it to the carbon bin (7) for storage.

4. The electromagnetic heating carbonization system according to claim 3, characterized in that, It also includes a dust removal module, a dust conveying module, and a carbon powder bin (9); The gas inlet of the dust removal module is connected to the gaseous product outlet, and the dust outlet is connected to the carbon powder bin (9) through the dust conveying module.

5. The electromagnetic heating carbonization system according to claim 4, characterized in that, The dust removal module includes a cooling dust removal device (10); The cooling and dust removal device (10) includes a tower body (10-1) and a heat exchange tube (10-3) disposed in the tower body (10-1); the top of the tower body (10-1) is provided with an air inlet, the bottom is provided with an air outlet and a first carbon powder collection hopper (10-2), and an expansion section is provided between the air inlet of the tower body (10-1) and the first carbon powder collection hopper (10-2); the heat exchange tube (10-3) is connected to the circulating cooling module (8); The dust conveying module includes a first carbon powder conveying screw (11), the feed end of which is connected to the first carbon powder collecting hopper (10-2), and the discharge end is connected to the carbon powder bin (9).

6. The electromagnetic heating carbonization system according to claim 5, characterized in that, An exhaust chamber (10-4) is provided between the tower body (10-1) and the first carbon powder collection hopper (10-2). The exhaust chamber (10-4) is arranged coaxially with the tower body (10-1), and the flow cross-section of the exhaust chamber (10-4) is larger than the flow cross-section of the tower body (10-1). The connection between the exhaust chamber (10-4) and the tower body (10-1) is covered with a flow equalization perforated plate (10-5).

7. The electromagnetic heating carbonization system according to claim 5, characterized in that, The dust removal module includes a bag filter (12); the air inlet of the bag filter (12) is connected to the air outlet of the cooling dust removal device (10), and a second carbon powder collection hopper (12-1) is provided at the bottom of the bag filter (12). The dust conveying module includes a second carbon powder conveying screw (13), the feed end of which is connected to the second carbon powder collecting hopper (12-1), and the discharge end is connected to the carbon powder bin (9).

8. The electromagnetic heating carbonization system according to claim 4, characterized in that, It also includes a tar treatment device (14), one end of which is provided with an air inlet and the other end with an air outlet. The air inlet of the tar treatment device (14) is connected to the gaseous product outlet, and the air outlet is connected to the dust removal module. The tar treatment device (14) includes multiple heating tubes (14-1) arranged in parallel and an excitation coil (3-2) disposed on the outer periphery of the heating tubes (14-1). The excitation coil (3-2) is electrically connected to the excitation power supply (3-1). One end of each of the multiple heating tubes (14-1) is connected to the air inlet of the tar treatment device (14), and the other end is connected to the air outlet of the tar treatment device (14).

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