Internal and external coupling heating continuous sinking bed catalytic pyrolysis poly-generation device and method

Abstract

The present invention relates to an internal and external coupling heating continuous sinking bed catalytic pyrolysis polygeneration device and method. The device includes a feeding system, a pyrolysis system, a catalyst and product separation system, and a catalyst regeneration system. The feeding system is located above the pyrolysis system and feeds dry solid fuel into the pyrolysis system. A hollow stirring shaft is provided inside the pyrolysis system, which can heat and fully mix the catalyst and the raw material at the same time. The lower part of the pyrolysis system is connected to the catalyst and product separation system for separating biochar and deactivated catalyst. The carbon deposited on the surface of the deactivated catalyst is controllably combusted and regenerated in the catalyst regeneration system and then re-fed into the pyrolysis system to heat the raw material and catalytically pyrolyze the product. The characteristics of the device and method are as follows: the easy-to-operate sinking bed does not require carrier gas, catalytic pyrolysis is used to prepare high-quality liquid fuel, biochar is collected to obtain high-performance carbon materials, the carbon deposited on the surface of the catalyst and part of the non-condensable gas are combusted to provide heat source for the pyrolysis system, realizing the regeneration of the catalyst and the hierarchical utilization of heat.

Description

Technical Field

[0001] The present invention relates to the technical field of solid fuel resource utilization, and particularly to an internally and externally coupled heating continuous sinking bed catalytic pyrolysis poly-generation device and method. Background Art

[0002] Traditional fossil fuels (such as natural gas, petroleum, coal, etc.) have the characteristics of non-renewability and will cause serious environmental pollution during their use. With the increasing attention of people to the energy crisis, the development of clean and renewable alternative energy has become a research hotspot in various countries around the world.

[0003] Biomass is currently the only solid fuel containing carbon and hydrogen elements in nature except fossil fuels, and has the advantages of renewability, low harmful substance content, rich raw materials, etc., and has received extensive attention worldwide. In the process of using biomass energy, pyrolysis technology can efficiently convert biomass into liquid fuels that are easy to store, transport, and have a high energy density. Therefore, since its appearance in the 1980s of the 20th century, it has developed very rapidly and is still widely concerned and studied. China is a large agricultural country, and a large amount of agricultural and forestry waste generated by agricultural and forestry crops can be used as raw materials for biomass pyrolysis devices. However, the high oxygen content and water content of biomass have caused many troubles to the development of biomass pyrolysis technology. For example, when no catalyst is added to the biomass pyrolysis reactor, coking is easy to occur in the reactor and continuous operation cannot be achieved. After adding a catalyst, due to the easy deactivation of the catalyst, a dual-bed device needs to be equipped, which has a large system volume, large investment, and low production efficiency. In addition, most biomass pyrolysis reactors need to supplement additional heat to maintain the temperature of the pyrolysis zone, resulting in a great waste of energy.

[0004] Therefore, it is necessary to develop a biomass catalytic pyrolysis poly-generation device that can meet continuous operation, has a simple structure, can control carbon deposition on the surface of the combustion catalyst and some non-condensable gases, collect biochar, and realize catalyst recycling and regeneration. Summary of the Invention

[0005] The purpose of the present invention is to provide a rationally designed internally and externally coupled heating continuous sinking bed catalytic pyrolysis poly-generation device and method in view of the defects of the prior art, which can meet the purposes of continuous operation, simple structure, burning non-condensable gases and heavy tar components, collecting biochar, and realizing catalyst recycling and regeneration.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] Internal and external coupling heating continuous sinking bed catalytic pyrolysis polygeneration device, characterized in that: it includes a feeding system, a pyrolysis system, a catalyst and product separation system, and a catalyst regeneration system; the pyrolysis system includes a pyrolyzer, a stirring shaft, and a stirring device. A jacket is arranged outside the pyrolyzer. The stirring shaft is arranged inside the pyrolyzer. The stirring device is coaxially connected to the stirring shaft. The feeding system is connected to the pyrolyzer; the catalyst regeneration system includes a first air distribution device, a combustion zone arranged inside the stirring shaft, and a cyclone separator. The inlet end of the combustion zone is connected to the first air distribution device. The outlet end of the combustion zone is connected to the inlet of the cyclone separator through a regenerated catalyst pipeline. The cyclone separator is connected to the jacket through a high-temperature gas pipeline. The cyclone separator is connected to the pyrolyzer through a catalyst delivery pipeline; the catalyst and product separation system includes a horizontal cyclone separation device and a condensation device. The material outlet at the bottom of the pyrolyzer is connected to the inlet of the horizontal cyclone separation device. The gaseous product outlet of the horizontal cyclone separation device is connected to the condensation device.

[0008] Further, the feeding system includes a raw material bin, a screw feeder, a cyclone dryer, a second air distribution device, a mixing pipeline, a raw material delivery pipeline, and a first hot air pipeline. The raw material bin is arranged at the inlet of the screw feeder. The second air distribution device and the screw feeder converge through the mixing pipeline and are connected to the inlet of the cyclone dryer. The outlet of the cyclone dryer is connected to the pyrolyzer through the raw material delivery pipeline. The first hot air pipeline is connected to the jacket and the mixing pipeline.

[0009] Further, the stirring device includes a material mixer and a double spiral ribbon stirring paddle. The material mixer and the double spiral ribbon stirring paddle are coaxially arranged on the stirring shaft from top to bottom in sequence.

[0010] Further, the outer diameter of the double spiral ribbon stirring paddle is nine-tenths of the diameter of the pyrolyzer, the inner diameter of the double spiral ribbon stirring paddle is seven-tenths of the diameter of the pyrolyzer, and the pitch of the double spiral ribbon stirring paddle is one-half of its outer diameter.

[0011] Further, a nitrogen supplement pipeline is arranged on the pyrolyzer.

[0012] Further, the catalyst and product separation system further includes a biochar separation device and a biochar cooling device. A screen is arranged inside the biochar separation device. The inlet of the biochar separation device is connected to the solid product outlet of the horizontal cyclone separation device. The outlet below the screen is connected to the combustion zone through a deactivated catalyst pipeline. The outlet above the screen is connected to the biochar cooling device.

[0013] Further, the gas outlet of the biochar cooling device is connected to the first hot air pipeline through a second hot air pipeline.

[0014] Furthermore, the catalyst and product separation system also includes a gas distribution device, the condensing device includes an air-cooled condensing device, an electrostatic collector, and a spray condensing device, the gaseous product outlet of the horizontal cyclone separation device is connected to the air-cooled condensing device, the electrostatic collector, the spray condensing device, and the gas distribution device in sequence, the gas distribution device is connected to the combustion zone through a non-condensable gas supplementary pipeline, and the gas outlet of the air-cooled condensing device is connected to the first hot air duct through the second hot air duct.

[0015] Furthermore, the screen is a double-layer structure staggered up and down, and its aperture is adjustable.

[0016] The internal and external coupling heating continuous sinking bed catalytic pyrolysis polygeneration method is characterized in that the internal and external coupling heating continuous sinking bed catalytic pyrolysis polygeneration device is used, and the steps include:

[0017] S1: The biomass fuel dried in the feeding system and the catalyst regenerated in the catalyst regeneration system are fed into the pyrolyzer at a drying temperature of 90-105°C;

[0018] S2: In the pyrolyzer, the biomass fuel and the catalyst are pyrolyzed under sufficient stirring and mixing in a stirring device, and the reaction temperature is 550-600°C;

[0019] S3: After the pyrolysis reaction, the mixture in the pyrolyzer is sent to the catalyst and product separation system to separate liquid bio-oil, non-condensable gas, high-performance carbon material, small-sized broken biochar and deactivated catalyst;

[0020] S4: Non-condensable gas, small-sized crushed biochar and deactivated catalyst are sent to the catalyst regeneration system to burn and regenerate the catalyst. The combustion temperature is 700°C. The generated heat is sequentially provided to the pyrolysis system and the feeding system for pyrolysis reaction and drying of biomass fuel, respectively.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The device of the present invention has a simple and compact structure, does not require a complex double-bed structure, meets the continuous operation requirements of the device, and improves production efficiency;

[0023] 2. The device of the present invention adopts internal and external coupling heating, does not need to provide additional heat source, and utilizes heat in stages, saving energy;

[0024] 3. The product separation effect is good. The heavy tar, part of the non-condensable gas and small-sized biochar attached to the catalyst surface are burned to provide a heat source for the pyrolysis system. Large-particle biochar is collected to obtain high-performance carbon materials, and light bio-oil components are condensed to obtain high-quality liquid fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an embodiment of an internal and external coupled heating continuous sinking bed catalytic pyrolysis polygeneration device of the present invention;

[0026] Figure 2 This is a schematic diagram of the process of adjusting the aperture of the screen in the embodiment of the present invention;

[0027] Among them: 1 - feeding system, 2 - pyrolysis system, 3 - catalyst and product separation system, 4 - catalyst regeneration system, 101 - cyclone dryer, 102 - raw material bin, 103 - screw feeder, 104 - second air distribution device, 105 - first hot air pipeline, 106 - mixing pipeline, 107 - raw material conveying pipeline, 201 - stirring shaft, 202 - nitrogen supplement pipeline, 203 - material mixer, 204 - double spiral ribbon stirring paddle, 205 - material outlet, 206 - pyrolyzer, 207 - pyrolyzer jacket, 301 - horizontal cyclone separator, 302 - air-cooled condensation device, 303 - electrostatic precipitator, 304 - spray condensation device, 305 - non-condensable gas outlet, 306 - gas distribution device 307 - non-condensable gas supplement pipeline, 308 - second hot air pipeline, 309 - biochar separation device, 310 - deactivated catalyst pipeline, 311 - biochar cooling device, 312 - screen, 401 - first air distribution device, 402 - combustion zone, 403 - regenerated catalyst pipeline, 404 - cyclone separator, 405 - high-temperature gas pipeline, 406 - catalyst conveying pipeline. Detailed implementation manners

[0028] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings. This embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0029] Figure 1 Shows a specific embodiment of an internal and external coupled heating continuous sinking bed catalytic pyrolysis polygeneration device, including four systems: a feeding system 1, a pyrolysis system 2, a catalyst and product separation system 3, and a catalyst regeneration system 4.

[0030] The feeding system 1 is located above the pyrolysis system 2 and is used to convey the dried solid biomass fuel into the pyrolysis system 2. The feeding system 1 includes: a raw material bin 102, a screw feeder 103, a cyclone dryer 101, a second air distribution device 104, a mixing pipeline 106, a raw material conveying pipeline 107, and a first hot air pipeline 105. The raw material bin 102 is arranged at the inlet of the screw feeder 103. After the second air distribution device 104 and the screw feeder 103 converge through the mixing pipeline 106, they are connected to the inlet of the cyclone dryer 101.

[0031] The pyrolysis system 2 includes a stirring shaft 201, a nitrogen supplement pipeline 202, a material mixer 203, a double spiral ribbon stirring paddle 204 and a pyrolyzer 206. A jacket 207 is arranged outside the pyrolyzer 206. The material mixer 203 and the double spiral ribbon stirring paddle 204 are coaxially arranged from top to bottom on the stirring shaft 201. The stirring shaft 201 is of a hollow structure and can rotate independently inside the pyrolyzer 206. The outlet of the cyclone dryer 101 is connected to the inside of the pyrolyzer through a raw material conveying pipeline 107, and the first hot air pipeline 105 is connected to the jacket 207 and the mixing pipeline 106.

[0032] The catalyst and product separation system 3 is located at the lower part of the pyrolysis system 2 and includes: a horizontal cyclone separation device 301, an air-cooled condensation device 302, an electrostatic precipitator 303, a spray condensation device 304, a gas distribution device 306, a biochar separation device 309, and a biochar cooling device 311. The lower part of the pyrolyzer 206 is connected to the inlet of the horizontal cyclone separation device 301 through a material outlet 205. The gaseous product outlet of the horizontal cyclone separation device 301 passes through a three-stage condensation device composed of an air-cooled condensation device 302, an electrostatic precipitator 303, and a spray condensation device 304 in sequence. The outlet of the spray condensation device 304 is connected to the gas distribution device 306. An incondensable gas outlet 305 and an incondensable gas supplement pipeline 307 are arranged above the gas distribution device 306. The solid product outlet of the horizontal cyclone separation device 301 is connected to the inlet of the biochar separation device 309. A screen 312 is arranged inside the biochar separation device 309. The outlet of the biochar separation device 309 below the screen 312 is connected to the stirring shaft 201 through an inactivated catalyst pipeline 310, and the outlet of the biochar separation device 309 above the screen 312 is connected to the biochar cooling device 311. The gas outlets of the air-cooled condensation device 302 and the biochar cooling device 311 are connected to the first hot air pipeline 105 in the feeding system 1 through a second hot air pipeline 308.

[0033] The catalyst regeneration system 4 includes: a first air distribution device 401, a combustion zone 402 arranged inside the stirring shaft 201, and a cyclone separator 404. The inlet end of the combustion zone 402 is connected to the first air distribution device 401, and the outlet end of the combustion zone 402 is connected to the inlet of the cyclone separator 404 through a regenerated catalyst pipeline 403. The cyclone separator 404 is connected to the jacket 207 through a high-temperature gas pipeline 405, and the cyclone separator 404 is connected to the pyrolyzer through a catalyst conveying pipeline 406. The regenerated catalyst is sent into the cyclone separator 404 through the regenerated catalyst pipeline 403, and then re-enters the pyrolysis system 2 from the catalyst conveying pipeline 406 below the cyclone separator 404. The high-temperature gas enters the jacket 207 of the pyrolyzer in the pyrolysis system 2 from the high-temperature gas pipeline 405 above the cyclone separator 404, so as to heat the catalyst and the biomass raw material outside the pyrolyzer 206.

[0034] The operation process and principle of the above embodiments are as follows: The high-temperature gas that has completed heating the pyrolysis system 2 flows into the first hot air pipeline 105 from the outlet of the pyrolyzer jacket 207. The second air distribution device 104 starts to work according to the moisture content and material characteristics of the biomass raw materials in the raw material bin 102 and introduces an appropriate amount of fresh low-temperature air, which is mixed with the high-temperature gas from the first hot air pipeline 105 to form a mixed gas with a temperature range of 90 - 105 °C. Subsequently, the biomass raw materials in the raw material bin 102 are transported into the mixing pipeline 106 through the spiral feeder 103 and enter the cyclone dryer 101 together with the above-mentioned mixed gas. The dried biomass raw materials pass through the outlet below the cyclone dryer 101 and enter the pyrolyzer 206 along the raw material transportation pipeline 107. The low-temperature gas after drying is discharged from the upper outlet of the cyclone dryer 101.

[0035] The first air distribution device 401 in the catalyst regeneration system 4 provides an appropriate amount of fresh air according to the mass of the catalyst and small-sized crushed biochar in the deactivated catalyst pipeline 310, and blows the catalyst and small-sized crushed biochar into the combustion zone 402 inside the stirring shaft 201 from bottom to top for combustion regeneration. The combustion temperature is 700 °C, and the heat generated by the combustion heats the catalyst and biomass raw materials inside the pyrolyzer 206. After the regeneration is completed, the catalyst is sent into the cyclone separator 404 through the regenerated catalyst pipeline 403, and then re-enters the pyrolyzer 206 from the catalyst transportation pipeline 406 below the cyclone separator 404. The high-temperature gas enters the pyrolyzer jacket 207 in the pyrolysis system 2 from the high-temperature gas pipeline 405 above the cyclone separator 404 and heats the catalyst and biomass raw materials outside the pyrolyzer 206.

[0036] The solid biomass fuel from the raw material transportation pipeline 107 and the high-temperature catalyst in the catalyst transportation pipeline 406 are preliminarily mixed when passing through the material mixer 203. The mixed materials are then further mixed by the double spiral ribbon stirring paddle 204 to make them fully stirred and evenly mixed and further react. The internal temperature range of the pyrolyzer 206 is 550 - 600 °C. The pyrolyzer jacket 207 is outside the pyrolyzer 206, and there is a certain gap between them. The outlet of the pyrolyzer jacket 207 is connected to the feeding system 1 through the first hot air pipeline 105. The reaction products, deactivated catalyst, and biochar are sent into the catalyst and product separation system 3 through the material outlet 205. The nitrogen supplement pipeline 202 is arranged on the upper side of the pyrolyzer 206 and is used to supplement an appropriate amount of nitrogen when the materials accumulate at the bottom of the pyrolyzer 206, and blow the materials at the bottom of the pyrolyzer 206 to the material outlet 205.

[0037] The reaction products, deactivated catalysts and biochar from the pyrolysis system 2 first enter the horizontal cyclone separator 301. The gaseous products therein, including pyrolysis oil vapor and non-condensable gas, in order to effectively prevent the condensation of the oil vapor therein and block the pipeline, enter the air-cooled condensation device 302 for preliminary cooling, and then enter the electrostatic precipitator 303 and the spray condensation device 304 in sequence. The pyrolysis oil vapor after being condensed becomes liquid bio-oil and is collected from below the gas distribution device 306, while the non-condensable gas finally enters the gas distribution device 306. The air-cooled condensation device 302 can achieve preliminary condensation and waste heat utilization. The electrostatic precipitator 303 can improve the yield of liquid products by capturing aerosol particles. The spray condensation device 304 can completely condense the oil vapor. The gas distribution device 306 can adjust the proportion of the gas flow rates in the non-condensable gas outlet 305 and the gas supply pipeline 307, so that the oxygen concentration is 15% after the gas entering the combustion zone 402 is mixed with the fresh air from the first air distribution device 401.

[0038] The solid products from the pyrolysis system 2, including biochar and catalyst, enter the biochar separation device 309 from the horizontal cyclone separator 301, and the screen 312 starts to vibrate and work. The large-sized biochar enters the biochar cooling device 311 after screening and obtains high-performance carbon materials after cooling. The deactivated catalysts and small-sized broken biochar enter the combustion zone 402 of the catalyst regeneration system 4 through the deactivated catalyst pipeline 310 for combustion regeneration after being screened by the biochar separation device 309.

[0039] As Figure 2 shown, the screen 312 in the biochar separation device 309 has a double-layer structure and can vibrate independently. By staggering the upper and lower layers, its pore size can be adjusted. Therefore, when the temperature in the combustion zone 402 of the catalyst regeneration system 4 is not sufficient to completely regenerate the catalyst, the pore size of the screen 312 can be adjusted to increase the amount of biochar in the solid products entering the deactivated catalyst pipeline 310 and increase the temperature in the combustion zone 402.

[0040] The high-temperature gas for cooling the gaseous products in the air-cooled condensation device 302 and cooling the solid products in the biochar cooling device 311 is connected to the first hot air pipeline 105 in the feeding system 1 through the auxiliary second hot air pipeline 308, so as to improve the utilization efficiency of the heat source.

[0041] The above specific embodiments are only for explaining the technical concept and structural features of the present invention, aiming to enable those skilled in the art to implement it accordingly. However, the above content does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. The internal and external coupling heating continuous sinking bed catalytic pyrolysis polygeneration device is characterized in that: It includes a feeding system (1), a pyrolysis system (2), a catalyst and product separation system (3), and a catalyst regeneration system (4); the pyrolysis system (2) includes a pyrolyzer (206), a stirring shaft (201), and a stirring device. A jacket (207) is provided outside the pyrolyzer (206). The stirring shaft (201) is arranged inside the pyrolyzer (206). The stirring device is coaxially connected to the stirring shaft (201). The feeding system (1) is connected to the pyrolyzer (206); the catalyst regeneration system (4) includes a first air distribution device (401), a combustion zone (402) arranged inside the stirring shaft (201), and a cyclone separator (404). The inlet end of the combustion zone (402) is connected to the first air distribution device (401). The outlet end of the combustion zone (402) is connected to the inlet of the cyclone separator (404) through a regenerated catalyst pipeline (403). The cyclone separator (404) is connected to the jacket (207) through a high-temperature gas pipeline (405). The cyclone separator (404) is connected to the pyrolyzer (206) through a catalyst conveying pipeline (406); the catalyst and product separation system (3) includes a horizontal cyclone separation device (301) and a condensation device. The material outlet (205) at the bottom of the pyrolyzer (206) is connected to the inlet of the horizontal cyclone separation device (301). The gaseous product outlet of the horizontal cyclone separation device (301) is connected to the condensation device. The feeding system (1) includes a raw material bin (102), a screw feeder (103), a cyclone dryer (101), a second air distribution device (104), a mixing pipeline (106), a raw material conveying pipeline (107), and a first hot air pipeline (105). The raw material bin (102) is arranged at the inlet of the screw feeder (103). The second air distribution device (104) and the screw feeder (103) converge through the mixing pipeline (106) and are then connected to the inlet of the cyclone dryer (101). The outlet of the cyclone dryer (101) is connected to the pyrolyzer (206) through the raw material conveying pipeline (107). The first hot air pipeline (105) is connected to the jacket (207) and the mixing pipeline (106).

2. The internal and external coupling heating continuous sinking bed catalytic pyrolysis polygeneration device according to claim 1, characterized in that: The stirring device includes a material mixer (203) and a double spiral ribbon stirring paddle (204). The material mixer (203) and the double spiral ribbon stirring paddle (204) are coaxially arranged on the stirring shaft (201) from top to bottom in sequence.

3. The continuous sinking bed catalytic pyrolysis polygeneration device with internal and external coupled heating according to claim 2, wherein: The outer diameter of the double spiral ribbon stirring paddle (204) is nine-tenths of the diameter of the pyrolyzer (206). The inner diameter of the double spiral ribbon stirring paddle (204) is seven-tenths of the diameter of the pyrolyzer (206). The pitch of the double spiral ribbon stirring paddle (204) is one-half of its outer diameter.

4. The continuous sinking bed catalytic pyrolysis poly-generation device with internal and external coupled heating according to claim 1, characterized in that: A nitrogen supplement pipeline (202) is provided on the pyrolyzer (206).

5. The continuous sinking bed catalytic pyrolysis poly-generation device with internal and external coupled heating according to claim 1, characterized in that: The catalyst and product separation system (3) further includes a biochar separation device (309) and a biochar cooling device (311). A screen (312) is arranged inside the biochar separation device (309). The inlet of the biochar separation device (309) is connected to the solid product outlet of the horizontal cyclone separation device (301). The outlet below the screen (312) is connected to the combustion zone (402) through an inactivated catalyst pipeline (310), and the outlet above the screen (312) is connected to the biochar cooling device (311).

6. The internal and external coupling heating continuous sinking bed catalytic pyrolysis poly-generation device according to claim 5, characterized in that: The gas outlet of the biochar cooling device (311) is connected to the first hot air pipeline (105) through a second hot air pipeline (308).

7. The continuous sinking bed catalytic pyrolysis poly-generation device with internal and external coupled heating according to claim 6, characterized in that: The catalyst and product separation system (3) further includes a gas distribution device (306). The condensation device includes an air-cooled condensation device (302), an electrostatic precipitator (303), and a spray condensation device (304). The gaseous product outlet of the horizontal cyclone separation device (301) is sequentially connected to the air-cooled condensation device (302), the electrostatic precipitator (303), the spray condensation device (304), and the gas distribution device (306). The gas distribution device (306) is connected to the combustion zone (402) through a non-condensable gas supplement pipeline (307). The gas outlet of the air-cooled condensation device (302) is connected to the first hot air pipeline (105) through the second hot air pipeline (308).

8. The continuous sinking bed catalytic pyrolysis poly-generation device with internal and external coupled heating according to claim 5, wherein: The screen (312) is a double-layer structure with upper and lower staggering, and its aperture is adjustable.

9. A continuous catalytic pyrolysis poly-generation method with internal and external coupled heating and a sunken bed, characterized in that, Using the internal and external coupled heating continuous sinking bed catalytic pyrolysis polygeneration device according to any one of claims 1-8, the steps include: S1: The biomass fuel dried in the feeding system (1) and the catalyst regenerated in the catalyst regeneration system (4) are fed into the pyrolyzer (206), and the drying temperature is 90-105 °C; S2: In the pyrolyzer (206), the biomass fuel and the catalyst are pyrolyzed under the full stirring and mixing of the stirring device, and the reaction temperature is 550-600 °C; S3: After the pyrolysis reaction, the mixture in the pyrolyzer (206) is fed into the catalyst and product separation system (3), and liquid bio-oil, non-condensable gas, high-performance carbon material, small-sized broken biochar, and inactivated catalyst are separated; S4: The non-condensable gas, small-sized broken biochar, and inactivated catalyst are fed into the catalyst regeneration system (4) to burn and regenerate the catalyst. The combustion temperature is 700 °C, and the generated heat is sequentially provided to the pyrolysis system (2) and the feeding system (1) for pyrolysis reaction and drying of biomass fuel respectively.

Images