Preparation of raw material for anode and system for hierarchical utilization of pyrolysis gas based on biomass pyrolysis

Abstract

The utility model provides a kind of raw material preparation and pyrolysis gas graded utilization system of green anode based on biomass pyrolysis, comprising: first pyrolysis furnace, it includes first combustion chamber, first shell and first screw conveyor, second pyrolysis furnace, it includes second combustion chamber, electromagnetic induction heating chamber, second shell and second screw conveyor, electromagnetic induction heating chamber is equipped with the electromagnetic heating coil being set around second shell;And pyrolysis gas processing subsystem, it includes tar storage tank, condensing tower, dissolved water storage room, nitrogen storage room and gas storage tank.The utility model has the beneficial effects: improve the problem that existing petroleum coke calcination cost is high, emission is high, effectively reduce the dosage of fuel gas, more green environmental protection, adopt multistage pyrolysis gas processing system, carry out multistage separation to pyrolysis gas, separated pyrolysis tar is used for subsequent green anode mixing, separated combustible gas is used to supplement gas supply in anode baking, realize energy saving and efficient, also avoid tail gas emission.

Description

Technical Field

[0001] This utility model relates to the technical field of prebaked anode production equipment, and in particular to a system for preparing raw anode materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis. Background Technology

[0002] The preparation of raw anode aggregate is an essential step in the production of electrolytic anodes. Traditional raw anode manufacturing uses petroleum coke, asphalt, and other materials as main raw materials through calcination, resulting in high raw material costs and large carbon emissions. Biomass pyrolysis can produce char for raw anode aggregate at low cost and with low emissions. However, while biomass pyrolysis technology can generate char, gaseous, and liquid products, the direct emission of water-soluble gases (such as CO2 and NH3) and non-water-soluble gases (such as CH4 and H2) from the pyrolysis gas causes environmental pollution and resource waste. Therefore, there is an urgent need for a technical solution that efficiently utilizes biomass pyrolysis char in raw anode manufacturing and classifies and utilizes the pyrolysis gas to achieve low carbon emissions and high efficiency, thereby achieving energy conservation and emission reduction. Utility Model Content

[0003] In view of this, in order to solve the problems of high cost and large carbon emissions in the preparation of existing green anode aggregates, the embodiments of this utility model provide a green anode raw material preparation and pyrolysis gas classification and utilization system based on biomass pyrolysis.

[0004] An embodiment of this utility model provides a system for preparing raw anode material and classifying and utilizing pyrolysis gas based on biomass pyrolysis, comprising:

[0005] The first pyrolysis furnace includes a first combustion chamber, a first outer shell, and a first screw conveyor. The first outer shell is disposed transversely through the first combustion chamber, and the first screw conveyor is disposed inside the first outer shell. The first combustion chamber is provided with a first burner. One end of the first outer shell is provided with a first nitrogen inlet and a feed inlet, and the other end is provided with a first pyrolysis gas pipe and a first discharge pipe.

[0006] The second pyrolysis furnace includes a second combustion chamber, an electromagnetic induction heating chamber, a second outer shell, and a second screw conveyor. The second outer shell passes through the second combustion chamber and the electromagnetic induction heating chamber in sequence. The second combustion chamber is equipped with a second burner. The electromagnetic induction heating chamber is equipped with an electromagnetic heating coil arranged around the second outer shell. The end of the second outer shell near the second combustion chamber is connected to the first feeding pipe and is equipped with a second nitrogen inlet. The end of the second outer shell near the electromagnetic induction heating chamber is equipped with a second pyrolysis gas pipe and a second feeding pipe.

[0007] The system also includes a pyrolysis gas treatment subsystem, comprising a tar storage tank, a condenser tower, a dissolved water storage chamber, a nitrogen storage chamber, and a gas storage tank. The dissolved water storage chamber is equipped with a first degassing membrane structure, and the nitrogen storage chamber is equipped with a second degassing membrane structure. The condenser tower is equipped with a gas transmission pipeline. The middle part of the gas transmission pipeline connects the first pyrolysis gas pipeline and the second pyrolysis gas pipeline. The lower end of the gas transmission pipeline is connected to the tar storage tank, and the upper end is sequentially connected to the first degassing membrane structure, the second degassing membrane structure, and the gas storage tank.

[0008] Furthermore, the first degassing membrane structure includes a first external air channel and a hollow fiber membrane. One end of the first external air channel is provided with a first pyrolysis gas inlet and the other end is provided with a first pyrolysis gas outlet. The hollow fiber membrane is disposed inside the first external air channel to form a first internal air channel. The first pyrolysis gas inlet is connected to the upper end of the gas transmission pipeline. The first pyrolysis gas outlet is connected to the second degassing membrane structure through a pipeline. Both ends of the first internal air channel are connected to the dissolved water storage chamber through circulation pipelines.

[0009] Furthermore, the second degassing membrane structure includes a second external air duct and a polyimide membrane. One end of the second external air duct is provided with a second pyrolysis gas inlet and the other end is provided with a second pyrolysis gas outlet. The polyimide membrane is disposed inside the second external air duct to form a second internal air duct. The second pyrolysis gas inlet is connected to the first degassing membrane structure, the second pyrolysis gas outlet is connected to the gas storage tank, and the second internal air duct is connected to the nitrogen storage chamber through a nitrogen absorption pipe.

[0010] Furthermore, the pyrolysis gas treatment subsystem also includes a drying tower, which is disposed between the second degassing membrane structure and the gas storage tank, and is connected to the second degassing membrane structure and the gas storage tank respectively through pipelines.

[0011] Furthermore, the electromagnetic induction heating chamber is disposed on one side of the second combustion chamber, and the electromagnetic induction heating chamber and the second combustion chamber are connected by an insulating material, with the second outer shell passing through the insulating material.

[0012] Furthermore, both the first burner and the second burner are gas burners. The gas burner includes an air passage, a gas passage, and a fan. The gas passage is located within the air passage and extends out of the air passage at its rear end, where it is equipped with a solenoid valve. An ignition transformer is located within the air passage. The rear end of the air passage is connected to the fan, and the fan is equipped with an air pressure switch.

[0013] Furthermore, both the first outer shell and the second outer shell are cylindrical tubes.

[0014] Furthermore, the first screw conveyor includes two first motors and a first screw auger, the first screw auger being disposed inside the first housing and extending out of the first housing at both ends and connected to the two first motors.

[0015] Furthermore, the second screw conveyor includes two second motors and a second screw auger, the second screw auger being disposed inside the second housing and extending out of the second housing at both ends and connected to the two second motors.

[0016] Furthermore, the tops of the first combustion chamber and the second combustion chamber are also connected to a waste heat boiler via pipes.

[0017] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows:

[0018] 1. This utility model discloses a system for preparing raw anode materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis. It employs a two-stage pyrolysis furnace consisting of a first pyrolysis furnace and a second pyrolysis furnace. The first pyrolysis furnace heats the biomass raw material to approximately 500°C at a low temperature. The second pyrolysis furnace heats the pyrolysis solid products from the first pyrolysis furnace to approximately 1200°C through gas combustion. The pyrolysis solid products are continuously heated and maintained at approximately 1200°C through an electromagnetic induction heating chamber. This achieves biomass pyrolysis char production, improving upon the high cost and high emissions of existing petroleum coke calcination. The use of gas-electric coupling heating and electromagnetic induction heating effectively reduces gas consumption, making it more environmentally friendly.

[0019] 2. This utility model discloses a system for preparing raw anode materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis. The pyrolysis gas treatment subsystem adopts a multi-stage pyrolysis gas treatment system, which can gradually separate pyrolysis tar, pyrolysis water-soluble gas, nitrogen in the pyrolysis gas, and combustible gas. This not only avoids tail gas emissions but also fully realizes the collection of tar and combustible gas in the pyrolysis gas. The tar can continue to be used for subsequent raw anode mixing, while the combustible gas can be used to supplement the gas supply in anode roasting, achieving energy saving and high efficiency.

[0020] 3. The present invention provides a system for preparing raw anode materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis. Both the first and second pyrolysis furnaces use motor-driven spiral augers to transport pyrolysis solid products. The heating time of the raw materials in the pyrolysis furnace can be adjusted by controlling the speed of the spiral augers with the motor, thereby achieving stable and uniform pyrolysis char production. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a system for preparing raw anode materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis according to this utility model.

[0022] Figure 2 This is a schematic diagram of a gas burner;

[0023] Figure 3 This is a schematic diagram of the first degassing membrane structure;

[0024] Figure 4 This is a schematic diagram of the second degassing membrane structure.

[0025] In the diagram: 1. First pyrolysis furnace; 101. First outer shell; 102. First nitrogen inlet; 103. Feed inlet; 104. First auger; 105. First combustion chamber; 106. First burner; 106a. Air passage; 106b. Gas passage; 106c. Fan; 106d. Ignition transformer; 106f. Air pressure switch; 106g. Solenoid valve; 106h. Burner; 107. First pyrolysis gas pipeline; 108. First feeding pipeline; 109. First sealed bearing; 110. First motor; 2. Second pyrolysis furnace; 201. Second outer shell; 202. Second nitrogen inlet; 203. Second auger; 204. Second combustion chamber; 205. Second burner; 206. Insulating material; 207. Electromagnetic induction heating chamber; 208. Electromagnetic heating coil; 209. Second feeding pipeline; 210. Hopper; 211. Second pyrolysis gas pipeline; 212. Second sealed bearing; 213. Second motor; 3. Pyrolysis gas treatment subsystem; 301. Condensation tower; 302. Tar storage tank; 303. Dissolved water storage chamber; 304. Nitrogen storage chamber; 305. Gas storage tank; 306. Drying tower; 307. Gas transmission pipeline; 308. First degassing membrane structure; 308a. First external gas duct; 308b. 308c, Hollow fiber membrane; 308d, First internal air duct; 308f, First pyrolysis gas inlet; 309, Second degassing membrane structure; 309a, Second external air duct; 309b, Polyimide membrane; 309c, Second internal air duct; 309d, Second pyrolysis gas inlet; 309f, Second pyrolysis gas outlet; 310, Circulation pipeline; 311, Water pump; 312, Nitrogen absorption pipeline. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0030] In the description of this utility model, it should be noted that the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon.

[0031] It should be further noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Please refer to Figure 1 The present invention provides a system for preparing raw anode materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis, which mainly includes a first pyrolysis furnace 1, a second pyrolysis furnace 2 and a pyrolysis gas treatment subsystem 3.

[0033] The first pyrolysis furnace 1 includes a first combustion chamber 105, a first outer shell 101, and a first screw conveyor. The first outer shell 101 is a horizontally arranged cylindrical tube that extends through the first combustion chamber 105. The first screw conveyor is disposed inside the first outer shell 101. The first combustion chamber 105 is equipped with a first burner 106. One end of the first outer shell 101 is provided with a first nitrogen inlet 102 and a feed inlet 103, and the other end is provided with a first pyrolysis gas pipe 107 and a first discharge pipe 108.

[0034] The first screw conveyor is a tubular screw conveyor. Specifically, the first screw conveyor includes two first motors 110 and a first auger 104. The first auger 104 is disposed inside the first housing 101 and extends out of both ends of the first housing 101. The two ends of the first auger 104 are sealed to the two ends of the first housing 101 through first sealed bearings 109. The two ends of the first auger 104 are respectively connected to the two first motors 110, and the two first motors 110 drive the first auger 104 to rotate to transport materials.

[0035] Biomass feedstock enters the first outer shell 101 through the feed inlet 103, while nitrogen is simultaneously introduced into the outer shell through the first nitrogen inlet 102. The first screw conveyor transports the biomass feedstock toward the first discharge pipe 108. When the biomass feedstock passes through the first combustion chamber 105, fuel is burned in the first burner 106, thereby heating the biomass feedstock inside the first outer shell 101. At this time, it is low-temperature heating, and the heating temperature is about 500°C.

[0036] The second pyrolysis furnace 2 includes a second combustion chamber 204, an electromagnetic induction heating chamber 207, a second outer shell 201, and a second screw conveyor. The second outer shell 201 is a horizontally arranged cylindrical tube. The second outer shell 201 passes through the second combustion chamber 204 and the electromagnetic induction heating chamber 207 in sequence. Here, the electromagnetic induction heating chamber 207 is located on one side of the second combustion chamber 204, and the electromagnetic induction heating chamber 207 and the second combustion chamber 204 are connected by an insulating material 206. The second outer shell 201 passes through the insulating material 206.

[0037] Similar to the first screw conveyor, the second screw conveyor includes two second motors 213 and a second screw auger 203. The second screw auger 203 is disposed inside the second housing 201 and extends out of both ends of the second housing 201. The two ends of the second screw auger 203 are sealed to the two ends of the second housing 201 through second sealed bearings 212. The two ends of the second screw auger 203 are respectively connected to the two second motors 213, which drive the second screw auger 203 to rotate to transport materials.

[0038] The second combustion chamber 204 is equipped with a second burner 205. The electromagnetic induction heating chamber 207 contains an electromagnetic heating coil 208 surrounding the second outer casing 201. The electromagnetic heating coil 208 is powered by solar energy or the mains power grid. The end of the second outer casing 201 near the second combustion chamber 204 is connected to the first feeding pipe 108 and has a second nitrogen inlet 202. The end of the second outer casing 201 near the electromagnetic induction heating chamber 207 has a second pyrolysis gas pipe 211 and a second feeding pipe 209. The lower end of the second feeding pipe 209 is connected to a hopper 210.

[0039] The first feeding pipe 108 transports the solid product from the first outer shell 101 to the second outer shell 201. The second screw conveyor transports the solid product to the second feeding pipe 209. The solid product sequentially passes through the second combustion chamber 204 and the electromagnetic induction heating chamber 207. When the solid product is in the second combustion chamber 204, fuel is burned by the second burner 205 to heat the solid product in the second outer shell 201 to about 1200°C. After entering the electromagnetic induction heating chamber 207, power is supplied to the electromagnetic heating coil 208, which continues to heat the solid product in the second outer shell 201, maintaining the solid product in the second outer shell 201 at 1200°C. This setup significantly saves fuel consumption. The solid product output from the second outer shell 201 is transported to the silo 210 through the second feeding pipe 209 for storing the calcined carbon material, which is subsequently mixed with pitch gold and tar in a certain proportion to form a green anode.

[0040] In some embodiments, both the first burner 106 and the second burner 205 are gas burners, such as... Figure 2 As shown, the gas burner includes an air passage 106a, a gas passage 106b, and a fan 106c. The gas passage 106b is located within the air passage 106a and extends outward from the air passage 106a, where it is equipped with a solenoid valve. An ignition transformer 106d is located within the air passage 106a. The fan 106c is connected to the rear end of the air passage 106a. The fan 106c is equipped with an air pressure switch 106f. A burner 106g with a solenoid valve 106h is located at the front end of the gas passage 106b. Gas is input through the gas passage 106b, and air is input through the air passage 106a via the fan 106c. The gas and air mix and are ignited by the ignition transformer 106d, causing the gas to burn at the burner 106g with the solenoid valve 106h. The gas flow rate can be adjusted via the solenoid valve, and the air flow rate can be adjusted via the air pressure switch 106f to achieve the combustion state required for biomass pyrolysis.

[0041] In some embodiments, the tops of the first combustion chamber 105 and the second combustion chamber 204 are also connected to a waste heat boiler via pipes. The exhaust gas from the combustion of the gas in the first combustion chamber 105 and the second combustion chamber 204 enters the waste heat boiler for waste heat utilization, thereby improving fuel utilization efficiency.

[0042] The pyrolysis gas treatment subsystem 3 includes a tar storage tank 302, a condenser tower 301, a dissolved water storage chamber 303, a nitrogen storage chamber 304, and a gas storage tank 305. The dissolved water storage chamber 303 is provided with a first degassing membrane structure 308, and the nitrogen storage chamber 304 is provided with a second degassing membrane structure 309. The condenser tower 301 is provided with a gas transmission pipe 307. The middle part of the gas transmission pipe 307 is connected to the first pyrolysis gas pipe 107 and the second pyrolysis gas pipe 211. The lower end of the gas transmission pipe 307 is connected to the tar storage tank 302, and the upper end is sequentially connected to the first degassing membrane structure 308, the second degassing membrane structure 309, and the gas storage tank 305.

[0043] The pyrolysis gas products from the first outer shell 101 and the second outer shell 201 are transported to the gas transmission pipeline 307. The condenser tower 301 condenses the pyrolysis tar in the pyrolysis gas products, allowing the cooled tar to flow into the tar storage tank 302 for collection. Then, as the pyrolysis gas products flow through the first degassing membrane structure 308, water-soluble gases are absorbed by circulating water. Next, as the pyrolysis gas products flow through the second degassing membrane structure 309, nitrogen is separated and stored in the nitrogen storage chamber 304. The pyrolysis gas products after nitrogen separation, which are mainly methane-based combustible gases, are transported to the gas storage tank 305 for storage, providing fuel for the subsequent roasting of the prebaked anode.

[0044] like Figure 3As shown, the first degassing membrane structure 308 specifically includes a first external air channel 308a and a hollow fiber membrane 308b. The first external air channel 308a has a tubular structure, with a first pyrolysis gas inlet 308d at one end and a first pyrolysis gas outlet 308f at the other end. The hollow fiber membrane 308b is disposed inside the first external air channel 308a to form a first internal air channel 308c. The first pyrolysis gas inlet 308d is connected to the upper end of the gas transmission pipe 307. The first pyrolysis gas outlet 308f is connected to the second degassing membrane structure 309 through a pipe. The two ends of the first internal air channel 308c are connected to the dissolved water storage chamber 303 through a circulation pipe 310. A water pump 311 is provided on the circulation pipe 310, and water circulates in the circulation pipe 310 under the action of the water pump 311. The pyrolysis gas products enter the first external gas channel 308a through the first pyrolysis gas inlet 308d, specifically into the space outside the first internal gas channel 308c. Water-soluble gases such as CO2 and NH3 in the pyrolysis gas products enter the hollow fiber membrane 308b, that is, into the first internal gas channel 308c. When the water in the circulation pipe 310 flows through the first internal gas channel 308c, it absorbs the water-soluble gases that enter. The remaining components of the pyrolysis gas products flow to the second degassing membrane structure 309.

[0045] like Figure 4 As shown, the second degassing membrane structure 309 specifically includes a second external air duct 309a and a polyimide membrane 309b. The second external air duct 309a has a tubular structure, with a second pyrolysis gas inlet 309d at one end and a second pyrolysis gas outlet 309f at the other end. The polyimide membrane 309b is disposed inside the second external air duct 309a to form a second internal air duct 309c. The second pyrolysis gas inlet 309d is connected to the first degassing membrane structure 308, and the second pyrolysis gas outlet 309f is connected to the gas storage tank 305. The second internal air duct 309c is connected to the nitrogen storage chamber 304 through a nitrogen absorption pipe 312. The pyrolysis gas products enter the second external gas channel 309a through the second pyrolysis gas inlet 309d, specifically into the space outside the second internal gas channel 309c. The nitrogen in the pyrolysis gas products easily passes through the polyimide membrane 309b, that is, enters the second internal gas channel 309c, and flows into the nitrogen storage chamber 304 for storage through the nitrogen absorption pipe 312, while the remaining component gases in the pyrolysis gas products flow to the gas storage tank 305.

[0046] In some embodiments, the pyrolysis gas treatment subsystem 3 further includes a drying tower 306, which is disposed between the second degassing membrane structure 309 and the gas storage tank 305, and is connected to the second degassing membrane structure 309 and the gas storage tank 305 respectively via pipelines. The pyrolysis gas product, from which nitrogen is separated by the second degassing membrane structure 309, is dried in the drying tower 306 before being stored in the gas storage tank 305 for use as fuel.

[0047] This utility model provides a system for preparing raw anode materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis. The second feeding pipe 209 of the second pyrolysis furnace 2 outputs solid products (carbon materials). The pyrolysis tar and pitch gold in the tar storage tank 302 of the pyrolysis gas treatment subsystem 3 can be mixed and kneaded in proportion to form raw anodes. The pyrolysis gas products, mainly methane, collected in the gas storage tank 305 of the pyrolysis gas treatment subsystem 3 can be used as fuel for the prebaked anode roasting process.

[0048] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0049] Where there is no conflict, the embodiments and features described above can be combined with each other. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A system for preparing raw anode feedstock and classifying and utilizing pyrolysis gas based on biomass pyrolysis, characterized in that, include: The first pyrolysis furnace includes a first combustion chamber, a first outer shell, and a first screw conveyor. The first outer shell is disposed transversely through the first combustion chamber, and the first screw conveyor is disposed inside the first outer shell. The first combustion chamber is provided with a first burner. One end of the first outer shell is provided with a first nitrogen inlet and a feed inlet, and the other end is provided with a first pyrolysis gas pipe and a first discharge pipe. The second pyrolysis furnace includes a second combustion chamber, an electromagnetic induction heating chamber, a second outer shell, and a second screw conveyor. The second outer shell passes through the second combustion chamber and the electromagnetic induction heating chamber in sequence. The second combustion chamber is equipped with a second burner. The electromagnetic induction heating chamber is equipped with an electromagnetic heating coil arranged around the second outer shell. The end of the second outer shell near the second combustion chamber is connected to the first feeding pipe and is equipped with a second nitrogen inlet. The end of the second outer shell near the electromagnetic induction heating chamber is equipped with a second pyrolysis gas pipe and a second feeding pipe. The system also includes a pyrolysis gas treatment subsystem, comprising a tar storage tank, a condenser tower, a dissolved water storage chamber, a nitrogen storage chamber, and a gas storage tank. The dissolved water storage chamber is equipped with a first degassing membrane structure, and the nitrogen storage chamber is equipped with a second degassing membrane structure. The condenser tower is equipped with a gas transmission pipeline. The middle part of the gas transmission pipeline connects the first pyrolysis gas pipeline and the second pyrolysis gas pipeline. The lower end of the gas transmission pipeline is connected to the tar storage tank, and the upper end is sequentially connected to the first degassing membrane structure, the second degassing membrane structure, and the gas storage tank.

2. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: The first degassing membrane structure includes a first external air channel and a hollow fiber membrane. One end of the first external air channel is provided with a first pyrolysis gas inlet and the other end is provided with a first pyrolysis gas outlet. The hollow fiber membrane is disposed inside the first external air channel to form a first internal air channel. The first pyrolysis gas inlet is connected to the upper end of the gas transmission pipeline. The first pyrolysis gas outlet is connected to the second degassing membrane structure through a pipeline. Both ends of the first internal air channel are connected to the dissolved water storage chamber through circulation pipelines.

3. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1 or 2, characterized in that: The second degassing membrane structure includes a second external air duct and a polyimide membrane. One end of the second external air duct is provided with a second pyrolysis gas inlet and the other end is provided with a second pyrolysis gas outlet. The polyimide membrane is disposed inside the second external air duct to form a second internal air duct. The second pyrolysis gas inlet is connected to the first degassing membrane structure, the second pyrolysis gas outlet is connected to the gas storage tank, and the second internal air duct is connected to the nitrogen storage chamber through a nitrogen absorption pipe.

4. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: The pyrolysis gas treatment subsystem further includes a drying tower, which is disposed between the second degassing membrane structure and the gas storage tank, and is connected to the second degassing membrane structure and the gas storage tank respectively through pipelines.

5. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: The electromagnetic induction heating chamber is located on one side of the second combustion chamber, and the electromagnetic induction heating chamber and the second combustion chamber are connected by an insulating material, with the second outer shell passing through the insulating material.

6. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: Both the first burner and the second burner are gas burners. The gas burner includes an air passage, a gas passage, and a fan. The gas passage is located within the air passage and extends out of the air passage at its rear end, and is equipped with a solenoid valve. An ignition transformer is located within the air passage. The rear end of the air passage is connected to the fan, and the fan is equipped with an air pressure switch.

7. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: Both the first outer shell and the second outer shell are cylindrical tubes.

8. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: The first screw conveyor includes two first motors and a first screw auger. The first screw auger is disposed inside the first housing and extends out of the first housing at both ends and is connected to the two first motors.

9. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: The second screw conveyor includes two second motors and a second screw auger. The second screw auger is disposed inside the second housing and extends out of the second housing at both ends and is connected to the two second motors.

10. The system for preparing green anode raw materials and classifying and utilizing pyrolysis gas based on biomass pyrolysis as described in claim 1, characterized in that: The tops of the first combustion chamber and the second combustion chamber are also connected to a waste heat boiler via pipes.

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