Forest and agricultural biomass skid-mounted pyrolysis device

Abstract

The invention relates to a forest and agricultural biomass skid-mounted pyrolysis device which comprises a heat energy supply chamber and a pyrolysis furnace, the heat energy supply chamber is arranged on the vertical center line of the pyrolysis furnace and comprises a heat transfer wall, a heating cavity is defined by the heat transfer wall, and a pyrolysis wall is arranged on the periphery of the heat transfer wall to form an annular pyrolysis cavity. Solid particles enter from the upper portion of the pyrolyzing furnace to serve as bed materials, oxygen-free gas enters from the bottom to enable the bed materials to form a fluidized bed in the pyrolyzing cavity, heat is produced in the heating cavity and transmitted to the fluidized bed, and the lower portion of the pyrolyzing furnace is communicated with a raw material feeding mechanism for inputting biomass raw materials into the pyrolyzing cavity. The top of the pyrolyzing furnace is communicated with an output mechanism for outputting gaseous intermediates to the outside of the pyrolyzing furnace, and the device can be moved to producing areas of waste low-density biomass raw materials such as straws and wood chips for treatment, so that the waste low-density biomass raw materials are converted into liquid oil and combustible gas to replace high-pollution energy sources such as coal, the heat loss is less, the heat efficiency is high, the control is easy, and the product yield is high.

Description

Technical Field

[0001] The invention relates to the technical field of biomass energy conversion, and in particular to a forestry and agricultural biomass skid-mounted pyrolysis device. Background Art

[0002] Pyrolysis is a biomass energy conversion technology. It refers to the process of decomposing waste low-density biomass raw materials such as straw, wood, and rice husks into intermediates by heating under anaerobic conditions, and the intermediates subsequently react to generate gaseous, liquid, and solid products. Biomass pyrolysis technology can convert agricultural and forestry waste such as straw and wood chips into liquid oil and combustible gas, replacing high-pollution energy sources such as coal, and significantly reducing the emission of pollutants such as particulate matter and sulfur dioxide. The current industrial situation is that the production areas of forestry and agricultural biomass are scattered and far away from biomass pyrolysis plants, resulting in high transportation costs. In addition, biomass pyrolysis equipment occupies a large area, the pyrolysis process consumes more energy, and the pipelines through which the raw materials pass are long, resulting in limited reaction efficiency and product quality. Summary of the Invention

[0003] The purpose of the present invention is to provide a skid-mounted pyrolysis device for forestry and agricultural biomass to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A forestry and agricultural biomass skid-mounted pyrolysis device includes a heat energy supply chamber and a pyrolysis furnace, the pyrolysis furnace including a connected first top cover, a pyrolysis wall and a first base from top to bottom, the heat energy supply chamber including a connected second top cover, a heat transfer wall and a second base from top to bottom, the heat energy supply chamber is installed in the pyrolysis reactor, and the installation method is that the second top cover is arranged on the vertical center line of the first top cover, the heat transfer wall encloses to form a heating chamber, the pyrolysis wall is arranged on the periphery of the heat transfer wall to form an annular pyrolysis chamber, the first base is provided with a sand feeding mechanism for conveying solid particles into the pyrolysis chamber, the solid particles form a fluidized bed in the pyrolysis chamber, the heat energy supply chamber is used to generate heat and transfer heat to the fluidized bed, the lower part of the pyrolysis furnace is connected to a raw material feeding mechanism for inputting biomass raw materials into the pyrolysis chamber, the lower part of the pyrolysis furnace is also connected to a first air inlet mechanism for inputting oxygen-free gas into the pyrolysis chamber, and the first top cover is connected to an output mechanism for outputting gaseous intermediates to the outside of the pyrolysis furnace.

[0006] As a further solution of the present invention: a heat transfer tube is provided between the heat transfer wall and the second base, and the heat transfer tube includes a connected elbow and a vertical tube from top to bottom. The side end opening of the elbow is connected to the pyrolysis chamber, and the bottom end opening of the vertical tube downwardly penetrates the second base. The first base is provided with an injection mechanism for ejecting high-pressure oxygen-free gas, and the injection port of the injection mechanism is aligned with the bottom end opening of the vertical tube.

[0007] As a further solution of the present invention: the jet mechanism includes a speed control mechanism for controlling the flow rate of the high-pressure oxygen-free gas.

[0008] As a further solution of the present invention: a raised portion is arranged around the outer periphery of the lower portion of the pyrolysis wall, a through opening is arranged at the lower portion of the pyrolysis wall, the interior of the raised portion is a cavity connected to the pyrolysis chamber via the through opening, the first base serves as the inner bottom surface of the raised portion, a sand feeding mechanism is arranged on the inner bottom surface of the raised portion, and the vertical cross-section of the pyrolysis furnace and the raised portion is stepped.

[0009] As a further solution of the present invention: the sand feeding mechanism includes a sand blasting head, the sand blasting head protrudes from the top surface of the first base, and the opening of the sand blasting head for spraying solid particles faces obliquely downward.

[0010] As a further solution of the present invention: the output mechanism includes an output pipe and a centrifugal separator assembly, one end of the output pipe is connected to the first top cover and communicates with the pyrolysis chamber, and the other end is communicated with the upper part of the centrifugal separator assembly, and the lower end of the centrifuge assembly is connected to the first top cover and communicates with the pyrolysis chamber.

[0011] As a further solution of the present invention: the centrifugal separator assembly includes a first centrifugal separator and a second centrifugal separator, the first centrifugal separator and the second centrifugal separator are connected by a pipe, and the lower end of the first centrifugal separator is provided with an opening connected to the pyrolysis chamber.

[0012] As a further solution of the present invention: the output mechanism further includes a transmission pipe and a condensation mechanism, one end of the transmission pipe is connected to the centrifugal separator assembly, and the other end is connected to the condensation mechanism.

[0013] As a further solution of the present invention: the raw material feeding mechanism includes a crushing mechanism for crushing the biomass raw material.

[0014] As a further solution of the present invention: the second base is connected to a third air intake mechanism for inputting air into the heating chamber, the second top cover is connected to a fuel intake mechanism for inputting fuel into the heating chamber, and the second top cover is connected to an exhaust mechanism for outputting combustion exhaust gas outside the heating chamber.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The various functional mechanisms of the skid-mounted pyrolysis device for forestry and agricultural biomass provided by the present invention are tightly installed and have a small size. It can be moved to the production site of waste low-density biomass raw materials such as straw and wood chips for processing, so that they are converted into liquid oil and combustible gas, replacing high-pollution energy sources such as coal. Through structural design, the solid particle fluidized bed is evenly distributed outside the heat energy supply room, with less heat loss, high thermal efficiency and easy control, and high product yield.

[0017] 2. In the present invention, the first centrifugal separator can return the solid particles mixed in the gaseous intermediate to the pyrolysis chamber, and the second centrifugal separator can add the incompletely pyrolyzed biomass raw materials contained in the gaseous intermediate back to the pyrolysis chamber, with almost no loss of solid particles and full utilization of resources.

[0018] 3. In the present invention, part of the gaseous intermediate produced is condensed into liquid oil by the condensing mechanism, and the uncondensed gaseous intermediate is mainly hydrocarbons and is re-added into the heating chamber as fuel, thereby fully utilizing resources.

[0019] 4. The combustion waste gas generated by the exhaust mechanism of the present invention is burned out by the burnout mechanism, and the gas mainly composed of carbon dioxide is introduced into the pyrolysis chamber to assist in creating oxygen-free and high-temperature conditions in the pyrolysis chamber, thereby making full use of resources.

[0020] 5. The jet mechanism of the present invention ejects high-pressure oxygen-free gas to push solid particles through the heat transfer tube into the fluidized bed. On the one hand, this promotes the flow and heating of the fluidized bed and accelerates the mixing of the fluidized bed and the biomass feedstock. On the other hand, it allows the deposited biomass feedstock to be re-introduced into the fluidized bed.

[0021] 6. In the present invention, the first air intake mechanism enables the oxygen-free gas to lift the solid particles upward to form a fluidized bed, and the second air intake mechanism enables the oxygen-free gas to cause the fluidized bed to flow around the heat energy supply chamber, thereby making the fluidized bed of solid particles in the pyrolysis chamber more full, improving heat utilization and reducing heat loss.

[0022] 7. The air inlet head used in the present invention is used to input oxygen-free gas into the pyrolysis chamber. The opening faces obliquely downward, and the solid particles will not fall out of the pyrolysis chamber when falling back. The solid particles can be reused, saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0025] Figure 3 It is an internal schematic diagram of the present invention.

[0026] Among them: 1. raw material feeding mechanism; 2. pyrolysis furnace; 21. first top cover; 22. pyrolysis wall; 23. first base; 24. pyrolysis chamber; 25. first air inlet mechanism; 251. first air inlet pipe; 252. air inlet head; 26. sand feeding mechanism; 27. jet mechanism; 28. raised portion; 29. second air inlet mechanism; 3. heat energy supply chamber; 31. second top cover; 32. heat transfer wall; 33. second base; 34. heating chamber; 35. third air inlet mechanism; 351. temperature sensor; 36. fuel feeding mechanism; 37. exhaust mechanism; 371. centrifugal separator assembly; 372. exhaust pipe; 38. heat transfer pipe; 381. elbow; 382. vertical pipe; 4. output mechanism; 41. output pipe; 42. first centrifugal separator; 43. second centrifugal separator; 44. transmission pipe. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-3 .

[0029] A skid-mounted pyrolysis device for forestry and agricultural biomass, comprising a heat supply chamber 3 and a pyrolysis furnace 2, wherein the pyrolysis furnace 2 comprises a first top cover 21, a pyrolysis wall 22 and a first base 23 connected from top to bottom, and the heat supply chamber 3 comprises a second top cover 31, a heat transfer wall 32 and a second base 33 connected from top to bottom, the cross sections of the pyrolysis wall 22 and the heat transfer wall 32 are both annular, the cross section of the first top cover 21 is annular, the cross section of the second top cover 31 is circular, the second top cover 31 is arranged on the vertical center line of the first top cover 21, the heat transfer wall 32 encloses a heating chamber 34, the pyrolysis wall 22 is arranged on the periphery of the heat transfer wall 32 to form an annular pyrolysis chamber 24, the first top cover 21 is connected to a sand feeding mechanism 26 for conveying solid particles into the pyrolysis chamber 24, the solid particles are quartz sand, and the first bottom The seat 23 is connected to a first air inlet mechanism 25 for inputting oxygen-free gas into the pyrolysis chamber 24. The oxygen-free gas is nitrogen, which serves as a gasifying agent for the fluidized bed and enters the pyrolysis chamber 24 at a speed of 1-3 m / s, lifting the solid particles so that the solid particles form a fluidized bed in the pyrolysis chamber 24. The heat energy supply chamber 3 is used to generate heat and transfer heat to the fluidized bed. The heat energy supply chamber 3 has a built-in mechanism for ignition, and the heat energy supply chamber 3 generates heat by combustion. The lower part of the pyrolysis furnace 2 is connected to a raw material input mechanism 1 for inputting biomass raw materials into the pyrolysis chamber 24. The first top cover 21 is connected to an output mechanism 4 for outputting gaseous intermediates to the outside of the pyrolysis furnace 2. After subsequent treatment, the gaseous intermediates can generate low-molecular hydrocarbon combustible gases, liquid oils such as acetic acid, acetone, methanol, and solid fuels such as charcoal.

[0030] The raw material feeding mechanism 1 includes a crushing mechanism for crushing biomass raw materials. The outlet of the raw material feeding mechanism 1 is directly connected to the pyrolysis chamber 24, and the biomass raw material particles are directly fed into the pyrolysis chamber 24.

[0031] A raised portion 28 is provided around the outer periphery of the lower portion of the pyrolysis wall 22, and a through opening is provided at the lower portion of the pyrolysis wall 22. The interior of the raised portion 28 is a cavity communicated with the pyrolysis chamber 24 via the through opening, and the fluidized bed moves in the cavity and the pyrolysis chamber 24. The first base 23 serves as the inner bottom surface of the raised portion 28, and the inner bottom surface of the raised portion 28 is connected to a first air intake mechanism 25. The vertical cross-section of the pyrolysis furnace 2 and the raised portion 28 is stepped, and the side wall of the raised portion 28 is connected to a second air intake mechanism 29 for introducing oxygen-free gas into the interior of the raised portion 28. Four second air intake mechanisms 29 are provided, and the four second air intake mechanisms 29 are distributed along the circumferential side wall of the raised portion 28. The first air intake mechanism 25 enables the oxygen-free gas to lift the solid particles upward to form a fluidized bed, and the second air intake mechanism 29 enables the oxygen-free gas to cause the fluidized bed to move around the heat energy supply chamber 3, so as to make the solid particle fluidized bed in the pyrolysis chamber 24 and the cavity inside the protrusion 28 more full, quickly mix with the biomass raw materials, improve heat utilization, and reduce heat loss.

[0032] The first air intake mechanism 25 includes a first air intake pipe 251 and an air intake head 252. The air intake head 252 protrudes from the top surface of the first base 23. The opening of the air intake head 252 for inputting oxygen-free gas into the pyrolysis chamber 24 is facing obliquely downward, so that the solid particles will not fall out of the pyrolysis chamber 24 when falling back, and can be reused to save resources.

[0033] A heat transfer tube 38 is disposed between the heat transfer wall 32 and the second base 33. From top to bottom, the heat transfer tube 38 comprises a connected curved tube 381 and a vertical tube 382. The side opening of the curved tube 381 communicates with the pyrolysis chamber 24, while the bottom opening of the vertical tube 382 extends downward through the second base 33. The first base 23 is provided with a jet mechanism 27 for ejecting high-pressure oxygen-free gas, which is high-pressure nitrogen. The jet port of the jet mechanism 27 is aligned with the bottom opening of the vertical tube 382. The ejection of high-pressure oxygen-free gas propels solid particles through the heat transfer tube 38 and into the fluidized bed. This not only promotes the flow and heating of the fluidized bed, accelerating the mixing of the fluidized bed and the biomass feedstock, but also allows settled biomass feedstock to be re-entered into the fluidized bed. The jet mechanism 27 includes a rate control mechanism (not shown) for controlling the flow rate of the high-pressure oxygen-free gas.

[0034] The output mechanism 4 includes an output pipe 41, a first centrifugal separator 42, and a second centrifugal separator 43. One end of the output pipe 41 is connected to the first top cover 21 and communicates with the pyrolysis chamber 24, and the other end is connected to the first centrifugal separator 42. The first centrifugal separator 42 and the second centrifugal separator 43 are connected by a pipe. The lower end of the first centrifugal separator 42 is connected to the first top cover 21 and communicates with the pyrolysis chamber 24, and the second centrifugal separator 43 is connected to the pyrolysis chamber 24. The first centrifugal separator 42 can return solid particles mixed in the gaseous intermediate to the pyrolysis chamber 24, and the second centrifugal separator 43 can allow incompletely pyrolyzed biomass feedstock contained in the gaseous intermediate to be re-added to the pyrolysis chamber 24, thereby virtually eliminating the loss of solid particles and fully utilizing resources.

[0035] The second base 33 is connected to a third air intake mechanism 35 for supplying air into the heating chamber 34. The second top cover 31 is connected to a fuel intake mechanism 36 for supplying fuel into the heating chamber 34. The second top cover 31 is connected to an exhaust mechanism 37 for discharging combustion exhaust gases out of the heating chamber 34. A temperature sensor 351 is provided on the second top cover 31 adjacent to the third air intake mechanism 35. The exhaust mechanism 37 includes a centrifugal separator assembly 371 and an exhaust pipe 372. One end of the centrifugal separator assembly 371 is connected to the second top cover 31 and communicates with the heating chamber 34. The other end communicates with the exhaust pipe 372, which is Y-shaped when viewed from above. The exhaust pipe 372 communicates with a burnout mechanism (not shown) for burning out the combustion exhaust gases. The burnout mechanism communicates with the pyrolysis chamber 24 to assist in creating an oxygen-free environment within the pyrolysis chamber 24. After being burned out by the burnout mechanism, the gas mainly composed of carbon dioxide is introduced into the pyrolysis chamber 24 to assist in creating oxygen-free and high-temperature conditions in the pyrolysis chamber 24, thereby fully utilizing resources.

[0036] The output mechanism 4 also includes a transmission pipe 44, one end of which is connected to the second centrifugal separator 43 and the other end to a condensing mechanism (not shown) for condensing the gaseous intermediate into liquid oil. The condensing mechanism is connected to the fuel mechanism 36 for feeding uncondensed gaseous intermediate into the heating chamber 34. A portion of the produced gaseous intermediate is condensed into liquid oil by the condensing mechanism, while the uncondensed gaseous intermediate, primarily hydrocarbons, is reintroduced into the heating chamber 34 as fuel, thus fully utilizing resources. The output pipe 41, first centrifugal separator 42, and second centrifugal separator 43 are each provided in pairs. The transmission pipe 44 is T-shaped when viewed from above.

[0037] The implementation principle of the present invention is: first, fuel is added to the heating chamber 34 through the fuel inlet mechanism 36, and at the same time, the third air inlet mechanism 35 inputs air into the heating chamber 34, and the combustion exhaust gas after combustion is discharged from the heating chamber 34 by the exhaust mechanism 37. The combustion exhaust gas passes through the centrifugal separator assembly 371 and then enters the burnout mechanism through the exhaust pipe 372. The gas mainly composed of carbon dioxide after the combustion exhaust gas is burned is introduced into the pyrolysis chamber 24 to assist in creating oxygen-free and temperature conditions in the pyrolysis chamber 24. After the heat transfer wall 32 and the heat transfer tube 38 are preheated, the sand feeding mechanism 26 adds quartz sand particles as bed material into the pyrolysis chamber 24. The first air inlet mechanism 25 feeds nitrogen upward into the pyrolysis chamber 24. Nitrogen, as a gasifying agent, enters the pyrolysis chamber 24 at a relatively low speed, usually 1-3 m / s, causing the bed material to flow in a bubbling manner. The second air inlet mechanism 29 feeds nitrogen into the pyrolysis chamber 24 from the side, causing the bed material to move around the heat energy supply chamber 3. Biomass materials such as straw enter the pyrolysis furnace 2 in the form of particles through the raw material feeding mechanism 1. The jet mechanism 27 ejects high-pressure nitrogen to push the quartz sand particles into the pyrolysis furnace 2. The particles pass through the entire heat transfer tube 38, so that the deposited biomass raw materials are re-added to the fluidized bed, and the generated gaseous intermediates are separated from the pyrolysis chamber 24 through the output pipe 41 and enter the first centrifugal separator 42. The quartz sand particles mixed in the gaseous intermediates are re-added to the pyrolysis chamber 24. The biomass raw materials that are not completely pyrolyzed after passing through the second centrifugal separator 43 are re-added to the pyrolysis chamber 24. The remaining substances enter the condensation mechanism through the transmission pipe 44 and are condensed to form liquid oil. The uncondensed gaseous intermediates are mainly hydrocarbons and are re-added to the heating chamber 34 as fuel.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Although this specification describes the embodiments, not every embodiment contains only one technical solution. This description is for clarity only. Those skilled in the art should read the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A skid-mounted pyrolysis device for forestry and agricultural biomass, characterized in that: The invention comprises a heat energy supply chamber (3) and a pyrolysis furnace (2), wherein the pyrolysis furnace (2) comprises, from top to bottom, a first top cover (21), a pyrolysis wall (22) and a first base (23) connected to each other, and the heat energy supply chamber (3) comprises, from top to bottom, a second top cover (31), a heat transfer wall (32) and a second base (33) connected to each other, wherein the second top cover (31) is arranged on the vertical center line of the first top cover (21), and the heat transfer wall (32) encloses a heating cavity (34), and the pyrolysis wall (22) is arranged on the periphery of the heat transfer wall (32) to form an annular pyrolysis cavity (24), and the first top cover (21) is provided on the periphery of the heat transfer wall (32) to form an annular pyrolysis cavity (24). ) is connected to a sand feeding mechanism (26) for conveying solid particles into the pyrolysis chamber (24), the first base (23) is connected to a first air inlet mechanism (25) for inputting oxygen-free gas into the pyrolysis chamber (24), the solid particles form a fluidized bed in the pyrolysis chamber (24), the heat energy supply chamber (3) is used to generate heat and transfer heat to the fluidized bed, the lower part of the pyrolysis furnace (2) is connected to a raw material feeding mechanism (1) for inputting biomass raw materials into the pyrolysis chamber (24), and the first top cover (21) is connected to an output mechanism (4) for outputting gaseous intermediates to the outside of the pyrolysis furnace (2).

2. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 1, characterized in that: A heat transfer pipe (38) is provided between the heat transfer wall (32) and the second base (33). The heat transfer pipe (38) comprises a connected curved pipe (381) and a vertical pipe (382) from top to bottom. The side opening of the curved pipe (381) is communicated with the pyrolysis chamber (24). The bottom opening of the vertical pipe (382) passes through the second base (33) downward. The first base (23) is provided with a jet mechanism (27) for ejecting high-pressure oxygen-free gas. The jet port of the jet mechanism (27) is aligned with the bottom opening of the vertical pipe (382).

3. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 1, characterized in that: The first air intake mechanism (25) comprises a first air intake pipe (251) and an air intake head (252). The air intake head (252) protrudes from the top surface of the first base (23). The opening of the air intake head (252) for inputting oxygen-free gas into the pyrolysis chamber (24) faces obliquely downward.

4. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 1, characterized in that: A raised portion (28) is provided around the outer side of the lower portion of the pyrolysis wall (22), a through opening is provided at the lower portion of the pyrolysis wall (22), the interior of the raised portion (28) is a cavity communicated with the pyrolysis chamber (24) via the through opening, the first base (23) serves as the inner bottom surface of the raised portion (28), the inner bottom surface of the raised portion (28) is connected to a first air intake mechanism (25), the vertical cross-section of the pyrolysis furnace (2) and the raised portion (28) is stepped, and the side wall of the raised portion (28) is connected to a second air intake mechanism (29) for introducing oxygen-free gas into the interior of the raised portion (28).

5. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 1, characterized in that: The second top cover (31) is connected to a third air intake mechanism (35) for inputting air into the heating chamber (34), the second top cover (31) is connected to a fuel intake mechanism (36) for inputting fuel into the heating chamber (34), and the second top cover (31) is connected to an exhaust mechanism (37) for outputting combustion exhaust gas out of the heating chamber (34).

6. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 5, characterized in that: The exhaust mechanism (37) comprises a centrifugal separator assembly (371) and an exhaust pipe (372). One end of the centrifugal separator assembly (371) is connected to the second top cover (31) and communicates with the heating chamber (34), and the other end is communicated with the exhaust pipe (372). The exhaust pipe (372) is communicated with a burnout mechanism for burning out the combustion waste gas. The burnout mechanism is connected to the pyrolysis chamber (24) to assist in creating an oxygen-free condition in the pyrolysis chamber (24).

7. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 5, characterized in that: A temperature sensor (351) is provided at a position of the second top cover (31) adjacent to the third air intake mechanism (35).

8. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 1, characterized in that: The output mechanism (4) comprises an output pipe (41), a first centrifugal separator (42) and a second centrifugal separator (43); one end of the output pipe (41) is connected to the first top cover (21) and communicates with the pyrolysis chamber (24); the other end is communicated with the first centrifugal separator (42); the first centrifugal separator (42) and the second centrifugal separator (43) are communicated with each other through a pipe; the lower end of the first centrifugal separator (42) is connected to the first top cover (21) and communicates with the pyrolysis chamber (24); the second centrifugal separator (43) is communicated with the pyrolysis chamber (24).

9. A skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 5 or 8, characterized in that: The output mechanism (4) further comprises a transmission pipe (44), one end of which is connected to the second centrifugal separator (43), and the other end of which is connected to a condensing mechanism for condensing the gaseous intermediate into liquid oil. The condensing mechanism is connected to a fuel mechanism (36) for adding the uncondensed gaseous intermediate into the heating chamber (34).

10. The skid-mounted pyrolysis device for forestry and agricultural biomass according to claim 1, characterized in that: The raw material feeding mechanism (1) comprises a pulverizing mechanism for pulverizing biomass raw materials.

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