Method for preparing carbon dioxide adsorption carbon material based on straw

Abstract

The application discloses a method for preparing carbon dioxide adsorption carbon material based on straw, and relates to the technical field of adsorption material preparation.The method comprises the following steps: step one, crushing and pretreating raw materials; step two, conveying the pretreated materials to a drying device for drying; step three, conveying the dried materials to a carbonization furnace for carbonization treatment; and step four, conveying the carbonized materials to a reaction furnace for activation treatment; wherein the drying device in step two comprises a first-stage drying box, a second-stage drying box and a material transferring mechanism, the material transferring mechanism comprises a material transferring assembly, the material transferring assembly is arranged in an outer shell, the material transferring assembly comprises a material beating plate and a reciprocating material beating driving assembly, and the reciprocating material beating driving assembly is in transmission connection with the material beating plate.The method can beat and scatter the caked materials by means of the reciprocating swing of the material beating plate, so that the materials falling to the second-stage drying box can be uniformly heated and sufficiently dried.

Description

Technical Field

[0001] This invention belongs to the field of adsorption material preparation technology, specifically relating to a method for preparing carbon dioxide adsorption carbon material based on straw. Background Technology

[0002] Straw is a general term for plant residues such as stalks and leaves left after crop harvesting, and it is a rich biomass resource. It typically comes from the stalks of crops such as wheat, rice, corn, and soybeans, and is widely present in agricultural production. Furthermore, straw serves as an ideal precursor for the preparation of porous carbon materials. Porous carbon materials prepared from straw are used to adsorb and capture carbon dioxide, thereby reducing carbon dioxide emissions into the atmosphere caused by rapid industrial development.

[0003] Existing methods for preparing carbon dioxide adsorbent carbon materials based on straw require drying the straw fragments to reduce moisture content and prevent moisture from affecting the subsequent carbonization process of biomass. However, for straw with high moisture content, the straw clumps together during drying, resulting in insufficient drying of the straw within the clumps and affecting the drying effect. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and rationally designed method for preparing carbon dioxide adsorbent carbon materials based on straw in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] The first aspect of this invention provides a method for preparing carbon dioxide adsorbent carbon material based on straw, the method comprising the following steps:

[0007] Step 1: Crush and pre-treat the raw materials;

[0008] Step 2: The pre-treated material is conveyed to the drying device for reciprocating discharge drying;

[0009] Step 3: The dried material is conveyed to the carbonization furnace for carbonization treatment;

[0010] Step 4: The carbonized material is transported to the reactor for activation treatment;

[0011] The second aspect of the present invention provides a drying device, namely the drying device described in step two, which includes a primary drying chamber, a secondary drying chamber, and a material transfer mechanism. The material transfer mechanism includes a material transfer component and a housing. The housing is disposed between the primary drying chamber and the secondary drying chamber, and is connected to both the primary drying chamber and the secondary drying chamber. The material transfer component is disposed in the housing and includes a material tapping plate and a reciprocating material tapping drive component. The reciprocating material tapping drive component is connected to the material tapping plate in a transmission manner. Under the drive of the reciprocating material tapping drive component, the material tapping plate oscillates back and forth.

[0012] As a further optimization of the present invention, the reciprocating material tapping drive assembly includes a telescopic drive component, a lifting plate, and a connecting rod. One end of the lifting plate is rotatably connected to the inner wall of the outer shell, and the other end of the lifting plate is rotatably connected to one end of the material tapping plate. The telescopic drive component is fixedly disposed on the lower side of the lifting plate and fixedly connected to the outer shell. The end of the telescopic drive component away from the outer shell is rotatably connected to the lifting plate. The connecting rod is rotatably connected to the lower side of the material tapping plate, and the other end of the connecting rod is rotatably connected to the outer shell. The rotatable connection point between the material tapping plate and the connecting rod is located adjacent to the lifting plate.

[0013] As a further optimization of the present invention, the outer shell is provided with an inlet and outlet at one end adjacent to the primary drying box, and the outer shell is connected to the primary drying box through the inlet and outlet. The outer shell is provided with a discharge outlet at one end adjacent to the secondary drying box, and the outer shell is connected to the secondary drying box through the discharge outlet.

[0014] The lifting plate is located below the upper and lower material inlets, and the tapping plate is located above the lower material inlet. When the lifting plate is in the lower swing position under the drive of the telescopic drive, the tilt of the tapping plate is less than that of the lifting plate; when the lifting plate is in the upper swing position under the drive of the telescopic drive, the tilt of the tapping plate is greater than that of the lifting plate.

[0015] As a further optimization of the present invention, a plurality of material support blocks are fixedly provided on the upper surface of the lifting plate, and the material support blocks have material support grooves.

[0016] As a further optimization of the present invention, the material tapping plate is provided with a plurality of material tapping blocks on the side facing the primary drying box.

[0017] As a further optimization of the present invention, the material transfer mechanism further includes a material pushing component and a side baffle. The material pushing component includes a material pushing ring. The side baffle is fixedly disposed in the housing near the bottom of the material inlet. The material pushing ring is disposed on the lower side of the material tapping plate, and the outer wall of the material pushing ring is slidably attached to the housing and the side baffle respectively. The material pushing ring is drivenly connected to the material tapping plate.

[0018] When the lifting plate is in the lower position, the pushing ring moves upward to its maximum displacement; when the lifting plate is in the upper position, the pushing ring moves downward to its maximum displacement.

[0019] As a further optimization of the present invention, a limiting plate is fixedly connected to the upper end of the pushing ring, and a limiting groove is formed on the limiting plate. A limiting post is fixedly connected to the side end of the tapping plate. The limiting post is correspondingly arranged with the limiting plate, and the limiting post is slidably connected to the limiting plate through the limiting groove.

[0020] As a further optimization of the present invention, a telescopic abutment block is provided at the end of the material tapping plate away from the lifting plate. The telescopic abutment block is slidably connected in the material tapping plate. A guide rod is fixedly connected to the inner end of the telescopic abutment block, and a spring is sleeved on the guide rod. Multiple fixed abutment blocks are provided at the upper end of the limiting plate along the extension direction of the limiting plate. The fixed abutment blocks and the telescopic abutment blocks are in frictional contact.

[0021] As a further optimization of the present invention, the drying temperature of the primary drying oven is lower than that of the secondary drying oven.

[0022] As a further optimization of the present invention, the primary drying box and the secondary drying box are respectively inclined. The primary drying box is provided with a feeding port near the feeding end, and the secondary drying box is provided with a discharge port near the discharge end. The end of the primary drying box near the feeding port is higher than the feeding port, and the end of the secondary drying box near the discharge port is lower than the discharge port.

[0023] The present invention has at least the following beneficial effects: The present invention provides a method for preparing carbon dioxide adsorption carbon material based on straw, which achieves uniform drying of the material by grading, dispersing and drying the crushed straw material, thereby ensuring that the quality of the prepared carbon dioxide adsorption carbon material meets the standards.

[0024] Moreover, the drying device used in this method uses the reciprocating swing of the patting plate to pat the material fed by the lifting plate, thereby breaking up the clumps of material and ensuring that the material is dried evenly and thoroughly after being dried in the secondary drying box.

[0025] In addition, when the material tapping plate swings back and forth, the friction between the telescopic contact block and the fixed contact block causes the material tapping plate to vibrate, preventing material debris from accumulating on the material tapping block. Then, through the reciprocating movement of the pusher ring, the material in the discharge port is discharged into the secondary drying box in an orderly manner, ensuring complete discharge. Attached Figure Description

[0026] Figure 1 This is a flowchart of the method of the present invention;

[0027] Figure 2This is a schematic diagram of the overall structure of the drying device of the present invention;

[0028] Figure 3 This is the present invention. Figure 2 Front structural diagram;

[0029] Figure 4 This is a cross-sectional view of the material transfer mechanism in this invention;

[0030] Figure 5 This is a partial cross-sectional view of the material transfer mechanism in this invention;

[0031] Figure 6 This is the present invention. Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 This is a schematic diagram of the material pushing component in this invention;

[0033] Figure 8 This is a schematic diagram of the material-tapping plate in this invention;

[0034] Figure 9 This is a schematic diagram of the structure of the material transfer mechanism of the present invention when the material pushing component is located in the lower material pushing position.

[0035] In the diagram: 1. Primary drying oven; 11. Feeding port; 12. Control panel; 2. Transfer mechanism; 21. Loading and unloading ports; 22. Outer shell; 23. Transfer assembly; 231. Telescopic drive component; 232. Lifting plate; 2322. Supporting block; 233. Tapping plate; 2333. Impacting block; 234. Connecting rod; 235. Telescopic contact block; 236. Spring; 237. Guide rod; 238. Fixed contact block; 24. Pushing assembly; 241. Pushing ring; 242. Limiting plate; 243. Limiting post; 25. Lower and lower loading ports; 26. Side baffle; 3. Secondary drying oven; 31. Discharge port. Detailed Implementation

[0036] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0037] Example 1

[0038] like Figures 1 to 9 As shown, a method for preparing carbon dioxide adsorbent carbon material based on straw includes the following steps:

[0039] Step 1: Crush and pre-treat the raw materials;

[0040] Step 2: The pre-treated material is conveyed to the drying device for drying;

[0041] Step 3: The dried material is conveyed to the carbonization furnace for carbonization treatment;

[0042] Step 4: The carbonized material is transported to the reactor for activation treatment;

[0043] The drying device described in step two includes a primary drying chamber 1, a secondary drying chamber 3, and a material transfer mechanism 2. The material transfer mechanism 2 includes a material transfer component 23 and a housing 22. The housing 22 is located between the primary drying chamber 1 and the secondary drying chamber 3, and is connected to both the primary drying chamber 1 and the secondary drying chamber 3. The material transfer component 23 is located in the housing 22 and includes a material tapping plate 233 and a reciprocating material tapping drive component. The reciprocating material tapping drive component is connected to the material tapping plate 233 in a transmission manner. Under the drive of the reciprocating material tapping drive component, the material tapping plate 233 swings back and forth.

[0044] The material falling onto the material plate 233 is tapped by the reciprocating oscillation of the tapping plate 233, thereby breaking up the material that has been initially dried in the primary drying chamber 1. This prevents the material from sticking together due to high moisture content. Sticky material will form clumps after drying, and incomplete drying inside these clumps will lead to uneven drying, affecting the quality of subsequent carbonization treatment. The material, after being tapped by the tapping plate 233, falls into the secondary drying chamber 3 for further drying. This ensures that the material is dried evenly after being broken up. For example, the drying temperature of the primary drying chamber 1 is lower than that of the secondary drying chamber 3, achieving graded drying of the straw material and ensuring the drying effect. This effectively guarantees the quality of the carbon dioxide adsorbent carbon material obtained according to the above preparation method.

[0045] For example, such as Figure 4 , Figure 5 and Figure 9 As shown, the reciprocating material-tapping drive assembly includes a telescopic drive component 231, a lifting plate 232, and a connecting rod 234. One end of the lifting plate 232 is rotatably connected to the inner wall of the outer shell 22, and the other end of the lifting plate 232 is rotatably connected to one end of the material-tapping plate 233. The telescopic drive component 231 is fixedly disposed on the lower side of the lifting plate 232 and fixedly connected to the outer shell 22. The end of the telescopic drive component 231 away from the outer shell 22 is rotatably connected to the lifting plate 232. The connecting rod 234 is rotatably connected to the lower side of the material-tapping plate 233, and the other end of the connecting rod 234 is rotatably connected to the outer shell 22. The rotatable connection point between the material-tapping plate 233 and the connecting rod 234 is located near the lifting plate 232.

[0046] It should be noted that, as Figure 3 and 4As shown, the outer shell 22 is provided with a loading port 21 at one end adjacent to the primary drying box 1, and the outer shell 22 is connected to the primary drying box 1 through the loading port 21. The outer shell 22 is provided with a discharge port 25 at one end adjacent to the secondary drying box 3, and the outer shell 22 is connected to the secondary drying box 3 through the discharge port 25.

[0047] The lifting plate 232 is located below the upper and lower feeding ports 21, and the tapping plate 233 is located above the lower feeding port 25. When the lifting plate 232 is in the downward swing position under the drive of the telescopic drive member 231, the inclination of the tapping plate 233 is less than that of the lifting plate 232; when the lifting plate 232 is in the upward swing position under the drive of the telescopic drive member 231, the inclination of the tapping plate 233 is greater than that of the lifting plate 232. For example, the telescopic drive member can be a hydraulic telescopic cylinder, an electrical telescopic member, or a power telescopic member; no limitation is made here.

[0048] In the above embodiment, the straw material, after being pre-dried in the primary drying chamber 1, falls through the inlet and outlet 21 onto the lifting plate 232. Driven by the telescopic drive component 231, the lifting plate 232 moves from... Figure 5 Swing clockwise to the position shown. Figure 9 During the process shown, the lifting plate 232 pushes the material out, causing it to fall above the slapping plate 233; then the lifting plate 232 rotates in the opposite direction, causing the slapping plate 233 to move from the position indicated. Figure 9 Swing clockwise to the position shown. Figure 5 The indicated position allows the material-tapping plate 233 to quickly tap the material, breaking up any clumps of semi-dry material. For example, as shown... Figure 5 As shown, multiple material support blocks 2322 are fixedly provided on the upper surface of the lifting plate 232. The material support blocks 2322 have material support grooves, which facilitate the support of newly falling material when the material tapping plate 233 taps the material. This prevents new material from slipping off the lifting plate 232 during the tapping process. By repeating the above actions, the clumps of material can be broken up. The broken up material is then further dried in the secondary drying chamber 3, resulting in uniform drying of the straw material and ensuring that the moisture content of the dried straw meets the process requirements.

[0049] like Figure 6 and Figure 8 As shown, exemplarily, the material-tapping plate 233 is provided with multiple material-tapping blocks 2333 on the side facing the primary drying chamber 1. Through the impact of the material-tapping blocks 2333, the contact area between the material-tapping blocks 2333 and the agglomerated material is reduced, increasing the impact intensity on the agglomerated material, thereby improving the dispersing effect of the agglomerated material. In other embodiments, such as... Figure 8 As shown, the impact block 2333 has a pointed tip, which facilitates the breaking up of agglomerated materials.

[0050] It should be noted that, as Figure 1 and Figure 2 As shown, the primary drying chamber 1 and the secondary drying chamber 3 are respectively inclined. The primary drying chamber 1 has a feeding port 11 near the feeding end, and the secondary drying chamber 3 has a discharge port 31 near the discharge end. The end of the primary drying chamber 1 near the feeding port 11 is higher than the feeding and unloading ports 21, and the end of the secondary drying chamber 3 near the discharge port 31 is lower than the unloading port 25. This inclined arrangement ensures that the material in both the primary and secondary drying chambers moves towards the discharge direction while being heated and dried, guaranteeing complete discharge. For example, a control panel 12 is provided on one side of both the primary and secondary drying chambers 1 and 3 to adjust parameters such as the drying temperature and material turning speed.

[0051] Example 2

[0052] Based on the above embodiments, please continue to refer to Figures 4 to 9 The material transfer mechanism 2 further includes a pushing assembly 24 and a side baffle 26. The pushing assembly 24 includes a pushing ring 241. The side baffle 26 is fixedly disposed in the housing 22 near the bottom feeding port 25. The pushing ring 241 is disposed on the lower side of the tapping plate 233, and the outer wall of the pushing ring 241 is slidably attached to the housing 22 and the side baffle 26 respectively. The pushing ring 241 is connected to the tapping plate 233 in a transmission manner.

[0053] When the lifting plate 232 is in the lower position, the pushing ring 241 moves upward to the maximum displacement; when the lifting plate 232 is in the upper position, the pushing ring 241 moves downward to the maximum displacement.

[0054] For example, the upper end of the pusher ring 241 is fixedly connected to a limiting plate 242, and a limiting groove is provided on the limiting plate 242. The side end of the patting plate 233 is fixedly connected to a limiting post 243, and the limiting post 243 is correspondingly arranged with the limiting plate 242. The limiting post 243 is slidably connected to the limiting plate 242 through the limiting groove.

[0055] As the material tapping plate 233 swings back and forth, the material tapping plate 233, through the transmission between the limiting post 243 and the limiting plate 242, enables the pushing ring 241 to move up and down, so that the material falling into the lower discharge port 25 will not be blocked.

[0056] Example 3

[0057] Based on the above embodiments, please continue to participate. Figure 5 , Figure 6 and Figure 7The material tapping plate 233 is provided with a telescopic abutment block 235 at one end away from the lifting plate 232. The telescopic abutment block 235 is slidably connected in the material tapping plate 233. A guide rod 237 is fixedly connected to the inner end of the telescopic abutment block 235. A spring 236 is sleeved on the guide rod 237. Multiple fixed abutment blocks 238 are provided at the upper end of the limiting plate 242 along the extension direction of the limiting plate 242. The fixed abutment blocks 238 and the telescopic abutment blocks 235 are in frictional contact engagement.

[0058] When the material board 233 is Figure 5 Swing clockwise to the position shown. Figure 9 When the position is shown, the frictional contact between the telescopic contact block 235 and the fixed contact block 238 causes the material-tapping plate 233 to vibrate, thereby shaking off the material on one side of the material-tapping plate 233. This prevents the dry material debris generated by tapping from accumulating on the material-tapping block 2333 on the material-tapping plate 233, ensuring complete material discharge.

[0059] This invention provides a method for preparing carbon dioxide adsorbent carbon material based on straw. The straw material is dried in the drying device provided by this invention, which can ensure the quality of the final carbon dioxide adsorbent carbon material. In use, the crushed straw material is first transported to the primary drying box 1 through the feeding port 11 for pre-drying treatment.

[0060] Then, the pre-dried straw material falls through the inlet / outlet 21 onto the lifting plate 232 in the outer shell 22. The material is held by the supporting block 2322. Driven by the telescopic drive component 231, the lifting plate 232 pushes the material out, causing it to fall above the patting plate 233. As the lifting plate 232 drives the patting plate 233 to swing clockwise, the material and the patting plate 233 move towards each other, causing the patting plate 233 to quickly strike the clumps of material, breaking them up. This ensures that the material conveyed through the outlet 25 to the secondary drying chamber 3 is evenly heated and dried, guaranteeing the drying effect. Furthermore, the patting plate 233... Figure 5 Swing clockwise to the position shown. Figure 9 When the position is shown, the frictional contact between the telescopic contact block 235 and the fixed contact block 238 causes the material-tapping plate 233 to vibrate, thereby shaking off the broken material on the material-tapping block 2333 and ensuring the material feeding effect; in addition, the reciprocating movement of the pusher ring 241 effectively avoids the blockage of material in the feed port 25.

[0061] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A method for preparing carbon dioxide adsorbent carbon material based on straw, characterized in that, The method includes the following steps: Step 1: Crush and pre-treat the raw materials; Step 2: The pre-treated material is conveyed to the drying device for reciprocating discharge drying; Step 3: The dried material is conveyed to the carbonization furnace for carbonization treatment; Step 4: The carbonized material is transported to the reactor for activation treatment; The drying device includes a primary drying chamber (1), a secondary drying chamber (3), and a material transfer mechanism (2). The material transfer mechanism (2) includes a material transfer component (23) and a housing (22). The housing (22) is located between the primary drying chamber (1) and the secondary drying chamber (3), and the housing (22) is connected to both the primary drying chamber (1) and the secondary drying chamber (3). The material transfer component (23) is located in the housing (22). The material transfer component (23) includes a material tapping plate (233) and a reciprocating material tapping drive component. The reciprocating material tapping drive component is connected to the material tapping plate (233) in a transmission manner. Under the drive of the reciprocating material tapping drive component, the material tapping plate (233) swings back and forth.

2. A device for preparing carbon dioxide adsorbent carbon material based on straw, characterized in that, The device includes a drying unit, which includes a primary drying chamber (1), a secondary drying chamber (3), and a material transfer mechanism (2). The material transfer mechanism (2) includes a material transfer component (23) and a housing (22). The housing (22) is located between the primary drying chamber (1) and the secondary drying chamber (3) and is connected to both the primary drying chamber (1) and the secondary drying chamber (3). The material transfer component (23) is located in the housing (22). The material transfer component (23) includes a material tapping plate (233) and a reciprocating material tapping drive component. The reciprocating material tapping drive component is connected to the material tapping plate (233) for transmission. Under the drive of the reciprocating material tapping drive component, the material tapping plate (233) swings back and forth.

3. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 2, characterized in that, The reciprocating material-tapping drive assembly includes a telescopic drive component (231), a lifting plate (232), and a connecting rod (234). One end of the lifting plate (232) is rotatably connected to the inner wall of the outer shell (22), and the other end of the lifting plate (232) is rotatably connected to one end of the material-tapping plate (233). The telescopic drive component (231) is fixedly installed on the lower side of the lifting plate (232) and fixedly connected to the outer shell (22). The end of the telescopic drive component (231) away from the outer shell (22) is rotatably connected to the lifting plate (232). The lower side of the material-tapping plate (233) is rotatably connected to the connecting rod (234), and the other end of the connecting rod (234) is rotatably connected to the outer shell (22). The rotatable connection point between the material-tapping plate (233) and the connecting rod (234) is located near the lifting plate (232).

4. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 3, characterized in that, The outer shell (22) is provided with a loading and unloading port (21) at one end adjacent to the first-stage drying box (1), and the outer shell (22) is connected to the first-stage drying box (1) through the loading and unloading port (21). The outer shell (22) is provided with a unloading port (25) at one end adjacent to the second-stage drying box (3), and the outer shell (22) is connected to the second-stage drying box (3) through the unloading port (25). The lifting plate (232) is located below the upper and lower material inlets (21), and the patting plate (233) is located above the lower material outlet (25). When the lifting plate (232) is in the lower swing position under the drive of the telescopic drive member (231), the tilt of the patting plate (233) is less than that of the lifting plate (232). When the lifting plate (232) is in the upper swing position under the drive of the telescopic drive member (231), the tilt of the patting plate (233) is greater than that of the lifting plate (232).

5. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 3, characterized in that, The upper surface of the lifting plate (232) is fixedly provided with a plurality of material support blocks (2322), and the material support blocks (2322) have material support grooves.

6. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 4, characterized in that, The material tapping plate (233) is provided with multiple material tapping blocks (2333) on the side facing the primary drying box (1).

7. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 5, characterized in that, The material transfer mechanism (2) further includes a material pushing assembly (24) and a side baffle (26). The material pushing assembly (24) includes a material pushing ring (241). The side baffle (26) is fixedly disposed in the housing (22) near the bottom feed port (25). The material pushing ring (241) is disposed on the lower side of the material tapping plate (233), and the outer wall of the material pushing ring (241) is slidably attached to the housing (22) and the side baffle (26) respectively. The material pushing ring (241) is connected to the material tapping plate (233) in a transmission manner. When the lifting plate (232) is in the lower position, the pushing ring (241) moves upward to the maximum displacement; when the lifting plate (232) is in the upper position, the pushing ring (241) moves downward to the maximum displacement.

8. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 7, characterized in that, The upper end of the pusher ring (241) is fixedly connected to a limiting plate (242), and a limiting groove is provided on the limiting plate (242). The side end of the patting plate (233) is fixedly connected to a limiting post (243), and the limiting post (243) is correspondingly arranged with the limiting plate (242). The limiting post (243) is slidably connected to the limiting plate (242) through the limiting groove.

9. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 8, characterized in that, The end of the material-tapping plate (233) away from the lifting plate (232) is provided with a telescopic abutment block (235). The telescopic abutment block (235) is slidably connected in the material-tapping plate (233). A guide rod (237) is fixedly connected to the inner end of the telescopic abutment block (235). A spring (236) is sleeved on the guide rod (237). Multiple fixed abutment blocks (238) are provided at the upper end of the limiting plate (242) along the extension direction of the limiting plate (242). The fixed abutment blocks (238) and the telescopic abutment blocks (235) are in frictional abutment cooperation.

10. The apparatus for preparing carbon dioxide adsorbent carbon material based on straw according to claim 8, characterized in that, The drying temperature of the primary drying oven (1) is lower than that of the secondary drying oven (3).

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