A continuous irradiation device and method for modifying a biomass precursor by ultraviolet light

Abstract

This invention relates to the field of ultraviolet (UV) light modification technology for biomass precursors, and particularly to a continuous UV irradiation device and method for biomass precursor modification. The device includes a reactor comprising a cylindrical body, conveying spiral blades, a spiral drive support plate, an internal light source, external light sources, and a conveying motor driving the conveying spiral blades. The conveying motor is fixedly mounted at the end of the cylindrical body. The spiral drive support plate is rotatably mounted inside the cylindrical body and is connected to the conveying motor. The conveying spiral blades are fixedly mounted on the spiral drive support plate. The internal light source is fixedly mounted on the central axis of the cylindrical body and extends axially. Multiple external light sources are fixedly mounted on the outer side walls of the cylindrical body and extend axially. This method effectively reduces the irradiation dead zones present in traditional static stacking methods, significantly improves modification uniformity and reaction sufficiency, and simultaneously enables continuous biomass modification production, meeting the capacity requirements of industrial mass production.

Description

Technical Field

[0001] This invention relates to the field of ultraviolet light modification technology for biomass precursors, and particularly to a continuous irradiation device and method for ultraviolet light modification of biomass precursors. Background Technology

[0002] Biomass carbon materials have become an important research direction for supercapacitors, ion battery electrode materials, and adsorption and catalytic support materials due to their significant advantages such as wide availability of raw materials, green and renewable nature, and low preparation cost. Traditional biomass carbon material preparation often employs high-temperature carbonization followed by chemical activation. This process suffers from high energy consumption, highly corrosive chemical activators, significant pollution during production, and difficulties in precisely controlling the pore structure of carbon materials, as well as severe loss of native heteroatoms from biomass, thus hindering the industrial application and performance improvement of biomass carbon materials. To address these issues, researchers have proposed using ultraviolet light as a green activator, combined with photocatalysis, to modify biomass and achieve a one-step process for in-situ pore formation and heteroatom doping. This process can significantly reduce the amount of chemical activator used, reduce production pollution, and precisely control the pore structure and heteroatom doping performance of carbon materials, representing an important development direction for the green preparation of biomass carbon materials.

[0003] However, existing ultraviolet (UV) light treatment equipment (such as UV lamp boxes and conveyor belt curing machines) are designed for processing planar, regularly shaped, or liquid materials. They are unsuitable for modifying solid, loose, irregularly shaped, and variable-density biomass powders / granules / fibers. The core technical defects are as follows: First, there are severe irradiation dead zones; the interior and bottom of the biomass cannot be effectively irradiated by UV light during stacking, resulting in insufficient biomass modification and significant local performance differences. Second, irradiation uniformity is poor; biomass particles naturally vary in size, and particles of different sizes receive significantly different UV light intensities, leading to low consistency in the final modification effect. Third... First, the lack of coordination between gas-solid mass transfer and illumination makes it difficult to ensure sufficient contact between gaseous reactants (such as ozone and atomic oxygen) and solid biomass during dynamic processing, resulting in low photocatalytic reaction efficiency. Second, low production efficiency, with existing equipment mostly operating on a batch basis, unable to achieve continuous production of biomass modification and failing to meet the capacity requirements of industrial mass production. Third, poor process controllability, unable to flexibly adjust key parameters such as UV light intensity and reaction atmosphere according to biomass type and modification requirements, and lacking effective temperature control methods; the heat generated by prolonged operation of UV lamps can easily cause pyrolysis of thermosensitive components in biomass, damaging the biomass precursor structure. Some studies have attempted to solve the biomass accumulation problem through artificial stirring, but this easily causes biomass particle breakage and cannot achieve continuous processing; some equipment has attempted to increase the irradiation range by increasing the number of UV light sources, but this has not solved the problem of coordination between gas-solid mass transfer and illumination, resulting in low photocatalytic reaction efficiency.

[0004] Therefore, there is an urgent need for a continuous irradiation device and method for ultraviolet light modification of biomass precursors to solve the above-mentioned technical problems. Summary of the Invention

[0005] The primary technical objective of this invention is to address the problems in the prior art by providing a continuous irradiation device for ultraviolet modification of biomass precursors.

[0006] The second technical objective of this invention is to address the problems in the background art by providing a continuous irradiation method for ultraviolet modification of biomass precursors.

[0007] The first technical objective of this invention is achieved through the following technical solution: A continuous irradiation device and method for ultraviolet modification of biomass precursors includes a reactor. The reactor includes a cylindrical body, conveying spiral blades, a spiral drive support plate, a built-in light source, an external light source, and a conveying motor for driving the conveying spiral blades. The conveying motor is fixedly mounted at the end of the cylindrical body. The spiral drive support plate is rotatably mounted inside the cylindrical body and is connected to the conveying motor. The conveying spiral blades are fixedly mounted on the spiral drive support plate. The built-in light source is fixedly mounted on the central axis of the cylindrical body and extends axially. A plurality of external light sources are fixedly mounted on the outer side wall of the cylindrical body and extend axially.

[0008] Preferably, the reactor further includes a material-turning protrusion, a plurality of which extend along the axial direction of the cylinder and are fixedly connected to the conveying spiral blades and the spiral drive support plate. When the conveying motor drives the spiral drive support plate to rotate, the conveying spiral blades and the material-turning protrusion rotate synchronously. During the process of the material being pushed by the conveying spiral blades, the material-turning protrusion scoops up the biomass material accumulated at the bottom of the cylinder. After the material is lifted to a certain height, it falls freely, forming a dynamic material curtain. Under the illumination of the built-in light source, it comes into full contact with ultraviolet light, eliminating the irradiation dead angles caused by the traditional static stacking method, and significantly improving the uniformity of modification and the sufficiency of reaction.

[0009] Preferably, the lifting direction of the material-turning protrusion deviates from the radial direction of the cylinder; the material-facing surface of the material-turning protrusion and the radial direction of the cylinder form a certain angle, so that the material can be lifted to a higher position and then sprinkled, increasing the contact area and duration of the material with the ultraviolet light emitted by the built-in light source, and further improving the efficiency of photocatalytic reaction.

[0010] Preferably, the reactor further includes a quick-release mechanism. A light source through hole is formed on the end wall of the cylinder away from the screw drive support plate. A fixing sleeve is fixedly fitted on the end of the built-in light source away from the screw drive support plate. The fixing sleeve extends out of the light source through hole. A clamping groove is formed on the outer wall of the fixing sleeve extending out of the light source through hole. The quick-release mechanism is fixed on the outer end wall of the cylinder and located around the light source through hole. The quick-release mechanism enables the rapid installation and removal of the built-in light source, significantly shortening the installation and removal time of the built-in light source, reducing the impact of maintenance operations on continuous production, and improving production efficiency.

[0011] Preferably, the quick-release mechanism includes at least two clamping assemblies. Each clamping assembly includes a driving block, a guide rod, a sliding seat, a guide rail, a clamping collar, and a quick-release cylinder for driving the driving block. The quick-release cylinders and guide rails of both clamping assemblies are fixedly mounted on the end wall of the cylinder and are respectively located on both sides symmetrically opposite the light source through-hole. The ejection direction of the quick-release cylinder points towards the center of the cylinder, and the extension directions of the guide rails are perpendicular to each other. The driving block is fixedly mounted on the ejection end of the quick-release cylinder, and the guide rod is fixedly mounted on the driving block. The extension direction of the guide rod is perpendicular to the ejection direction of the quick-release cylinder. The sliding seat is slidably mounted on the guide rail and slidably connected to the guide rod. The clamping collar is fixedly mounted on the sliding seat and extends into the clamping groove. The quick-release cylinder drives the drive block to move radially along the cylinder. When the built-in light source needs to be installed, the quick-release cylinder retracts, causing the drive block to move radially outward. The sliding seat slides outward on the guide rail along with the drive block via the guide rod. The clamping collar then opens radially outward and is inserted into the built-in light source through the light source through-hole. After installation, the quick-release cylinder pushes out, causing the clamping collar to retract radially inward until it clamps the clamping groove 32.

[0012] Preferably, the reactor further includes a feed inlet, a discharge outlet, a feeding screw, and an atmosphere regulating mechanism. The atmosphere regulating mechanism includes a first gas pipe, a second gas pipe, a gas source box, a tail gas box, and a four-way reversing valve. The feed inlet is fixedly located on the side wall of the cylinder and at the top. The discharge outlet is fixedly located on the end wall of the cylinder away from the feed inlet and at the bottom. The feeding screw rotates inside the feed inlet. The first gas pipe is fixedly located at the bottom of the cylinder and below the feed inlet. The second gas pipe is fixedly located at the top of the cylinder and above the discharge outlet. The first gas pipe, the second gas pipe, the gas source box, and the tail gas box are respectively connected to each end of the four-way reversing valve. The feeding screw can precisely control the feed rate and fully disperse the material flow to prevent material bridging. The atmosphere regulating mechanism can selectively introduce reactive gas and / or inert protective gas from the bottom or top of the cylinder according to the modification process requirements to achieve co-current or counter-current contact mode of gas and material, thereby optimizing gas-solid mass transfer efficiency and reaction selectivity.

[0013] Preferably, a semi-annular cooling hood is provided on the lower half of the outer wall of the cylinder, and the cooling hood and the outer wall of the cylinder form a cooling air channel, with the external light source located inside the cooling air channel; the cooling airflow in the cooling air channel performs forced convection heat exchange on the external light source and the outer wall of the cylinder, effectively preventing the external light source from light decaying or being damaged due to overheating, while avoiding the thermal decomposition of the heat-sensitive components of the biomass material due to excessively high cylinder wall temperature, thus protecting the structural integrity of the precursor.

[0014] Preferably, the built-in light source and the external light source are one or more combinations of ultraviolet LED arrays, excimer lamps, and ultraviolet lamp tubes; the built-in light source and the external light source provide ultraviolet light with a wavelength of 315-420nm.

[0015] The second technical objective of this invention is achieved through the following technical solution: A continuous irradiation method for ultraviolet modification of biomass precursors includes a continuous irradiation device for ultraviolet modification of biomass precursors, and further includes the following steps: S1. Material feeding: The biomass precursor is fed into the cylinder through the feed inlet; S2. Atmosphere conditioning: Reactive gas and / or inert protective gas are introduced through the first or second trachea; S3. Online modification: Start the conveyor motor, built-in light source and external light source. The conveyor spiral blades drive the material forward. The material turning ridge lifts the material and sprinkles it. The built-in light source illuminates the material sprinkled in the cylinder. The external light source illuminates the material at the bottom of the cylinder. S4. Material discharge: The modified material is discharged from the cylinder through the discharge port along with the conveying spiral blades.

[0016] Preferably, in step S2, when rapid surface activation of the material is required, gas is introduced from the first gas pipe and exhaust gas is discharged from the second gas pipe, flowing in the same direction as the material flow. When deep and uniform modification of the material is required, gas is introduced from the second gas pipe and exhaust gas is discharged from the first gas pipe, flowing in the opposite direction to the material flow. When rapid surface activation of the material is required, the parallel flow mode causes the gas concentration to decrease along the material flow direction, resulting in a strong reaction at the front end of the material flow, achieving rapid surface activation and avoiding excessive oxidation that could damage the pore structure. When deep and uniform modification of the material is required, the counter-flow mode allows the gas to contact the material that is about to be modified and discharged, ensuring the full progress of the deep modification reaction.

[0017] In summary, the present invention has the following beneficial effects: 1. This invention achieves comprehensive dynamic irradiation treatment of solid, loose biomass materials through the coordinated arrangement of built-in and external light sources and the continuous conveying structure of the conveying spiral blades. The built-in light source extends axially along the central axis of the cylinder, emitting ultraviolet light from the center of the material accumulation area outwards, penetrating the gaps between material particles. The external light source is arranged axially along the outer side wall of the cylinder, irradiating the material layer at the bottom of the cylinder from the outside. This effectively reduces the irradiation dead angles present in traditional static accumulation methods, allowing the material to receive irradiation from both internal and external light sources, significantly improving the uniformity of modification and the sufficiency of reaction. At the same time, it enables continuous production of biomass modification, meeting the capacity requirements of industrial mass production.

[0018] 2. The atmosphere conditioning mechanism of the present invention enables the device to switch between co-current or counter-current modes of the introduced gas according to the type of target product, so that the gaseous reactants and solid biomass can fully contact each other during dynamic processing, solving the technical problem of the difficulty in coordinating gas-solid mass transfer and light irradiation. At the same time, the optimization of airflow organization enables precise adaptation to different modification processes.

[0019] 3. The material-turning protrusion of the present invention lifts and sprinkles the bottom material to form a material curtain, eliminating irradiation dead angles and ensuring that each particle can receive full irradiation from both internal and external light sources; the quick-release mechanism greatly shortens the maintenance and replacement time of the light source and reduces equipment downtime losses; the cooling hood allows the cylinder wall and external light source to be subjected to forced convection cooling in the cooling air duct, effectively preventing overheating and light decay of the light source and pyrolysis of biomass heat-sensitive components. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a continuous irradiation device for ultraviolet light modification of biomass precursors according to the present invention. Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the conveying spiral blade, built-in light source, and external light source structure of the present invention; Figure 4 This is a cross-sectional view of the overall structure of the present invention; Figure 5 This is a schematic diagram of the quick-release mechanism of the present invention; Figure 6 This is a cross-sectional schematic diagram of the quick-release mechanism structure of the present invention; Figure 7 This is a schematic diagram of the atmosphere regulating mechanism of the present invention; In the diagram, 1. Reactor; 11. Shell; 12. Light source through hole; 13. Feed inlet; 14. Discharge outlet; 15. Feeding screw; 16. Cooling hood; 17. Cooling duct; 2. Conveying screw blades; 21. Screw drive support plate; 22. Conveying motor; 3. Built-in light source; 31. Fixed sleeve; 32. Clamping groove; 4. External light source; 5. Tilting protrusion; 6. Quick release mechanism; 60. Clamping assembly; 61. Drive block; 62. Guide rod; 63. Sliding seat; 64. Guide rail; 65. Clamping collar; 66. Quick release cylinder; 7. Atmosphere conditioning mechanism; 71. First gas pipe; 72. Second gas pipe; 73. Gas source box; 74. Exhaust gas box; 75. Four-way reversing valve. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-7 The present invention will be described in further detail below.

[0022] Example 1

[0023] according to Figure 1 , Figure 3 As shown, a continuous irradiation device for ultraviolet modification of biomass precursors includes a reactor 1. The reactor 1 includes a cylindrical body 11, a conveying spiral blade 2, a spiral drive support plate 21, a built-in light source 3, an external light source 4, and a conveying motor 22 that drives the conveying spiral blade 2. The conveying motor 22 is fixedly installed at the end of the cylindrical body 11. The spiral drive support plate 21 is rotatably installed inside the cylindrical body 11 and is connected to the conveying motor 22. The conveying spiral blade 2 is fixedly installed on the spiral drive support plate 21. The built-in light source 3 is fixedly installed on the central axis of the cylindrical body 11 and extends axially. Multiple external light sources 4 are fixedly installed on the outer side wall of the cylindrical body 11 and extend axially.

[0024] according to Figure 3 As shown, the reactor 1 also includes a material turning protrusion 5, and multiple material turning protrusions 5 extend axially along the cylinder 11 and are fixedly connected to the conveying spiral blade 2 and the spiral drive support plate 21.

[0025] according to Figure 4 As shown, the lifting direction of the material turning protrusion 5 deviates from the radial direction of the cylinder 11.

[0026] according to Figure 5 , Figure 6As shown, the reactor 1 also includes a quick-release mechanism 6. A light source through hole 12 is provided on the end wall of the cylinder 11 away from the screw drive support plate 21. A fixed sleeve 31 is fixedly sleeved on the end of the built-in light source 3 away from the screw drive support plate 21. The fixed sleeve 31 extends out of the light source through hole 12. A clamping groove 32 is provided on the outer wall of the fixed sleeve 31 extending out of the light source through hole 12. The quick-release mechanism 6 is fixedly installed on the outer end wall of the cylinder 11 and located around the light source through hole 12.

[0027] according to Figure 5 , Figure 6 As shown, the quick-release mechanism 6 includes at least two clamping assemblies 60. Each clamping assembly 60 includes a drive block 61, a guide rod 62, a sliding seat 63, a guide rail 64, a clamping collar 65, and a quick-release cylinder 66 that drives the drive block 61. The quick-release cylinder 66 and the guide rail 64 of the two clamping assemblies 60 are fixedly mounted on the end wall of the cylinder 11 and are located on both sides symmetrically opposite to the light source through hole 12. The ejection direction of the quick-release cylinder 66 points towards the center of the cylinder 11, and the extension directions of the guide rail 64 are perpendicular to each other. The drive block 61 is fixedly mounted on the ejection end of the quick-release cylinder 66, and the guide rod 62 is fixedly mounted on the drive block 61. The extension direction of the guide rod 62 is perpendicular to the ejection direction of the quick-release cylinder 66. The sliding seat 63 is slidably mounted on the guide rail 64 and slidably connected to the guide rod 62. The clamping collar 65 is fixedly mounted on the sliding seat 63 and extends into the clamping groove 32.

[0028] according to Figure 1 , Figure 2 , Figure 7 As shown, reactor 1 also includes an inlet 13, an outlet 14, a feeding screw 15, and an atmosphere regulating mechanism 7. The atmosphere regulating mechanism 7 includes a first gas pipe 71, a second gas pipe 72, a gas source box 73, a tail gas box 74, and a four-way reversing valve 75. The inlet 13 is fixedly installed on the side wall of the cylinder 11 and located at the top. The outlet 14 is fixedly installed on the end wall of the cylinder 11 away from the inlet 13 and located at the bottom. The feeding screw 15 is rotatably installed inside the inlet 13. The first gas pipe 71 is fixedly installed at the bottom of the cylinder 11 and located below the inlet 13. The second gas pipe 72 is fixedly installed at the top of the cylinder 11 and located above the outlet 14. The first gas pipe 71, the second gas pipe 72, the gas source box 73, and the tail gas box 74 are respectively connected to each end of the four-way reversing valve 75.

[0029] according to Figure 1 , Figure 4 As shown, a semi-annular cooling shroud 16 is provided on the lower half of the outer wall of the cylinder 11. The cooling shroud 16 and the outer wall of the cylinder 11 form a cooling air duct 17, and the external light source 4 is located in the cooling air duct 17.

[0030] according to Figure 3 As shown, the built-in light source 3 and the external light source 4 are one or more combinations of ultraviolet LED arrays, excimer lamps, and ultraviolet lamp tubes.

[0031] according to Figures 1 to 7 As shown, a continuous irradiation method for ultraviolet modification of biomass precursors includes a continuous irradiation device for ultraviolet modification of biomass precursors, and further includes the following steps: S1. Material feeding: The biomass precursor is fed into the cylinder 11 through the feed inlet 13; S2, Atmosphere conditioning: Reactive gas and / or inert protective gas are introduced through the first gas tube 71 or the second gas tube 72; S3, Online Modification: Start the conveyor motor 22, the built-in light source 3 and the external light source 4. The conveyor spiral blade 2 drives the material forward. The material turning convex 5 drives the material to be lifted and sprinkled. The built-in light source 3 illuminates the material sprinkled inside the cylinder 11, and the external light source 4 illuminates the material at the bottom of the cylinder 11.

[0032] S4. Material discharge: The modified material is discharged from the cylinder 11 through the discharge port 14 along with the conveying spiral blades 2.

[0033] according to Figure 7 As shown, in step S2, when rapid surface activation of the material is required, gas is introduced from the first gas pipe 71 and exhaust gas is discharged from the second gas pipe 72, flowing in the same direction as the material. When deep and uniform modification of the material is required, gas is introduced from the second gas pipe 72 and exhaust gas is discharged from the first gas pipe 71, flowing in the opposite direction to the material.

[0034] Working principle: According to Figures 1 to 7 As shown, the quick-release cylinder 66 of the quick-release mechanism 6 retracts, driving the drive block 61 to move radially outward along the cylinder 11, causing the sliding seat 63 to slide outward along the guide rail 64 under the limit of the guide rod 62. The clamping collar 65 then opens outward and inserts the built-in light source 3 through the light source through hole 12 until the tail end abuts against the screw drive support plate 21. The quick-release cylinder 66 pushes out, causing the clamping collar 65 to retract inward until it extends into and clamps the clamping groove 32, completing the installation of the built-in light source 3. The material enters the cylinder 11 from the feed port 13 through the feeding screw 15. The conveying motor 22 drives the screw drive support plate 21 to rotate, driving the conveying screw blades 2 and the turning screw to rotate. The material turning ridge 5 rotates synchronously, and the material moves towards the discharge port 14 under the conveying action of the conveying spiral blade 2. During the forward movement, the turning ridge 5 continuously scoops up the material accumulated at the bottom of the cylinder 11 and lifts it up. When the material reaches a certain height with the turning ridge 5, it falls under the action of gravity and comes into full contact with the circumferential ultraviolet light emitted by the built-in light source 3. At the same time, the material near the bottom wall of the cylinder 11 is fully irradiated by the external light source 4. Reactive gas and / or inert protective gas are introduced through the first air pipe 71 or the second air pipe 72. The material undergoes full ultraviolet light modification during the conveying process until it is discharged through the discharge port 14. The continuous online modification of the material is completed.

[0035] Example 2

[0036] according to Figure 7 As shown, a multi-level porous carbon material for adsorption is prepared using wood chips as raw material. The dried wood chips are fed into the cylinder 11 through the feeding screw 15, and an O3 / N2 mixed gas is introduced through the first gas pipe 71. The airflow and material flow are parallel. Ultraviolet light and ozone work together to oxidize and etch the wood chips to form initial channels. The modified wood chips are continuously discharged and sent to a carbonization furnace. After carbonization, the multi-level porous carbon material for adsorption is obtained.

[0037] Example 3

[0038] according to Figure 7 As shown, a sodium-ion battery hard carbon material is prepared using bamboo fiber as raw material. The dried bamboo fiber is fed into the cylinder 11 through the feeding screw 15, and an O2 / N2 mixed gas is introduced through the second gas pipe 72. The airflow and material flow are counter-current. Ultraviolet light excites O2 to produce ozone, and at the same time, the chemical bonds on the surface of the bamboo fiber are broken to achieve in-situ pore formation of the bamboo fiber. The modified bamboo fiber is continuously discharged and sent to the carbonization furnace. After carbonization, the sodium-ion battery hard carbon material is obtained.

[0039] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A continuous irradiation device for ultraviolet modification of biomass precursors, comprising a reactor (1), wherein the reactor (1) comprises a cylinder (11), a conveying spiral blade (2), a spiral drive support plate (21), a built-in light source (3), an external light source (4), and a conveying motor (22) for driving the conveying spiral blade (2), wherein the conveying motor (22) is fixedly disposed at the end of the cylinder (11), the spiral drive support plate (21) is rotatably disposed inside the cylinder (11) and is connected to the conveying motor (22) for transmission, the conveying spiral blade (2) is fixedly disposed on the spiral drive support plate (21), the built-in light source (3) is fixedly disposed on the central axis of the cylinder (11) and extends axially, and a plurality of external light sources (4) are fixedly disposed on the outer side wall of the cylinder (11) and extend axially.

2. The continuous irradiation device for ultraviolet modification of biomass precursors according to claim 1, characterized in that, The reactor (1) also includes a material turning protrusion (5), and a plurality of the material turning protrusions (5) extend axially along the cylinder (11) and are fixedly connected to the conveying spiral blade (2) and the spiral drive support plate (21).

3. The continuous irradiation device for ultraviolet modification of biomass precursors according to claim 2, characterized in that, The lifting direction of the turning protrusion (5) deviates from the radial direction of the cylinder (11).

4. The continuous irradiation device for ultraviolet modification of biomass precursors according to claim 1, characterized in that, The reactor (1) also includes a quick-release mechanism (6). A light source through hole (12) is provided on the end wall of the cylinder (11) away from the screw drive support plate (21). A fixed sleeve (31) is fixedly sleeved on the end of the built-in light source (3) away from the screw drive support plate (21). The fixed sleeve (31) extends out of the light source through hole (12). A clamping groove (32) is provided on the outer side wall of the fixed sleeve (31) extending out of the light source through hole (12). The quick-release mechanism (6) is fixedly installed on the outer end wall of the cylinder (11) and located around the light source through hole (12).

5. A continuous irradiation device for ultraviolet modification of biomass precursors according to claim 4, characterized in that, The quick-release mechanism (6) includes at least two clamping assemblies (60). Each clamping assembly (60) includes a drive block (61), a guide rod (62), a sliding seat (63), a guide rail (64), a clamping collar (65), and a quick-release cylinder (66) for driving the drive block (61). The quick-release cylinders (66) and guide rails (64) of the two clamping assemblies (60) are fixedly mounted on the end wall of the cylinder (11) and are located symmetrically on both sides of the light source through hole (12). The ejection direction of the quick-release cylinder (66) points towards the cylinder. (11) At the center, the extension directions of the guide rail (64) are perpendicular to each other. The drive block (61) is fixedly mounted on the ejection end of the quick-release cylinder (66). The guide rod (62) is fixedly mounted on the drive block (61). The extension direction of the guide rod (62) is perpendicular to the ejection direction of the quick-release cylinder (66). The sliding seat (63) is slidably mounted on the guide rail (64) and slidably connected to the guide rod (62). The clamping collar (65) is fixedly mounted on the sliding seat (63) and extends into the clamping groove (32).

6. The continuous irradiation device for ultraviolet modification of biomass precursors according to claim 1, characterized in that, The reactor (1) further includes an inlet (13), an outlet (14), a feeding screw (15), and an atmosphere regulating mechanism (7). The atmosphere regulating mechanism (7) includes a first gas pipe (71), a second gas pipe (72), a gas source box (73), a tail gas box (74), and a four-way reversing valve (75). The inlet (13) is fixedly installed on the side wall of the cylinder (11) and located at the top. The outlet (14) is fixedly installed on the end wall of the cylinder (11) away from the inlet (13). The upper part is located at the bottom, the feeding screw (15) is rotatably installed inside the feed inlet (13), the first air pipe (71) is fixedly installed at the bottom of the cylinder (11) and located below the feed inlet (13), the second air pipe (72) is fixedly installed at the top of the cylinder (11) and located above the discharge port (14), the first air pipe (71), the second air pipe (72), the air source box (73) and the tail gas box (74) are respectively connected to each end of the four-way reversing valve (75).

7. The continuous irradiation device for ultraviolet modification of biomass precursors according to claim 1, characterized in that, A semi-annular cooling hood (16) is provided on the lower half of the outer wall of the cylinder (11). The cooling hood (16) and the outer wall of the cylinder (11) form a cooling air duct (17). The external light source (4) is located in the cooling air duct (17).

8. A continuous irradiation device for ultraviolet modification of biomass precursors according to claim 1, characterized in that, The built-in light source (3) and the external light source (4) are one or more combinations of ultraviolet LED array, excimer lamp, and ultraviolet lamp tube.

9. A continuous irradiation method for ultraviolet modification of biomass precursors, comprising the continuous irradiation apparatus for ultraviolet modification of biomass precursors as described in any one of claims 1 to 8, further comprising the following steps: S1. Material feeding: The biomass precursor is fed into the cylinder (11) through the feed port (13); S2, Atmosphere conditioning: Reactive gas and / or inert protective gas are introduced through the first gas tube (71) or the second gas tube (72); S3, Online modification: Start the conveying motor (22), built-in light source (3) and external light source (4), the conveying spiral blade (2) drives the material forward, the material turning ridge (5) drives the material to be lifted and sprinkled, the built-in light source (3) illuminates the material sprinkled in the cylinder (11), and the external light source (4) illuminates the material at the bottom of the cylinder (11); S4. Material discharge: The modified material is discharged from the cylinder (11) through the discharge port (14) along with the conveying spiral blades (2).

10. The continuous irradiation method for ultraviolet modification of biomass precursors according to claim 9, characterized in that, In step S2, when rapid surface activation of the material is required, gas is introduced from the first gas pipe (71) and exhaust gas is discharged from the second gas pipe (72), flowing in the same direction as the material. When deep and uniform modification of the material is required, gas is introduced from the second gas pipe (72) and exhaust gas is discharged from the first gas pipe (71), flowing in the opposite direction to the material.

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