Pretreatment method for treating wood through phosphoric acid method

Abstract

The invention relates to a pretreatment method for treating wood by a phosphoric acid method, which comprises the following steps: S1, taking wood crushed into fine grains as a raw material, uniformly spreading the raw material, then spraying a phosphoric acid solution to the raw material, wetting the raw material, and uniformly stirring the raw material while spraying until a liquid layer appears at the bottom of a container for containing the raw material; s2, heating and moisturizing the raw materials fully wetted in the step S1 together with the container, keeping a humidity environment, and heating at the same time; and S3, adding the material treated in the step S2 into a phosphoric acid solution, stirring and mixing, and filtering to obtain a solid material, namely the pretreated wood material.

Description

Technical Field

[0001] The invention belongs to the technical field of preparing activated carbon by phosphoric acid method, and in particular relates to a pretreatment method for treating wood by phosphoric acid method. Background Art

[0002] The raw materials of wood activated carbon are sawdust, wood blocks, coconut shells, fruit shells, etc., which are mainly processed and produced by physical method, phosphoric acid method and zinc chloride method. The mesoporous structure and specific surface area of ​​wood activated carbon are more developed, with large adsorption capacity, fast filtration speed, high strength and low ash content, reasonable pore size distribution and high ignition point. Wood activated carbon has a wide range of uses, such as gas phase adsorption, liquid phase adsorption, organic solvent recovery, catalyst carrier, etc. The phosphoric acid method is mainly to mix and impregnate wood raw materials with phosphoric acid first, and through the swelling effect of phosphoric acid, the biopolymers in the raw materials swell and dissolve to form pores; phosphoric acid can further oxidize the formed carbon and corrode the carbon body to form a microporous structure; at high temperature, phosphoric acid promotes cellulose depolymerization and the formation of aromatic ring structure, further increasing the pore structure and specific surface area of ​​activated carbon. Then, the raw materials are carbonized and activated at high temperature, and then extruded to obtain activated carbon products.

[0003] At present, phosphoric acid treatment of wood raw materials mainly adopts the traditional immersion combined with stirring method. After the wood is broken into fine particles, the surface area increases and there is air in the pores on its surface. Such raw materials in phosphoric acid may not have smooth air discharge, resulting in insufficient contact of the pores or gaps inside the wood particles with phosphoric acid and insufficient reaction. If the stirring speed is increased, bubbles are easily generated, which is also unfavorable and affects the subsequent carbonization and activation effects and energy consumption. Summary of the invention

[0004] In view of the above problems, the present invention provides a pretreatment method for treating wood with phosphoric acid, comprising:

[0005] S1: Use wood that has been crushed into fine particles as raw material, spread the raw material evenly, then spray phosphoric acid solution on the raw material to wet the raw material, and evenly stir the raw material while spraying until a liquid layer appears at the bottom of the container containing the raw material;

[0006] S2: heating and moisturizing the raw material and the container after being fully moistened in step S1, maintaining the humidity environment while heating;

[0007] S3: putting the material treated in step S2 into a phosphoric acid solution, stirring and mixing, and the solid material after filtering is the pretreated wood material.

[0008] The present invention optimizes the process of pretreating wood raw materials with phosphoric acid, and adds two processes of spraying and moisturizing before the traditional process of mixing phosphoric acid with wood. The raw materials are evenly spread into a certain area, and then the phosphoric acid solution is sprayed. The raw materials are moved while spraying to fully wet the wood particles. At the same time, the raw materials will fully absorb the phosphoric acid solution. At this time, the wood is in an atmospheric environment, and the air pressure inside and outside the wood pores is balanced. The resistance to the discharge of bubbles in the wood pores is small, which is conducive to the discharge of bubbles and the full wetting of the wood when moving. The operation of step S1 can basically wet the surface and interior of the wood. When a liquid layer appears at the bottom of the container, it means that the interior of the wood to a certain depth can also be wetted, but it cannot guarantee that the interior of the wood is completely and completely wetted.

[0009] The present invention has also innovated step S2. On the basis of heating and moisturizing, the contact time between the wood and the phosphoric acid solution is extended. Heating promotes the evaporation of water vapor. In order to avoid the wood surface from drying again, the present invention adopts spray moisturizing means to ensure that the wood surface and interior are in a moist state. At the same time, heating is combined to promote phosphoric acid to continue to react with the biomass and / or organic matter of the wood. In the last step S3, the wood material with sufficient internal exhaust and a certain degree of reaction completely enters the phosphoric acid solution, is stirred and mixed, and fully reacted.

[0010] In order to cooperate with the above method, the present invention further provides a pretreatment device, including a main treatment tower, which is cylindrical and includes a spray chamber, a heat treatment chamber and a mixing chamber from top to bottom. The spray chamber is provided with a spray device, a rotatable toggle device and a separable material tray from top to bottom. A first partition that can be opened and closed is provided between the spray chamber and the heat treatment chamber, and a second partition that can be opened and closed is provided between the heat treatment chamber and the mixing chamber, which is used to transfer the material tray and the material between the chambers.

[0011] A heating component and a spray component are arranged in the heat treatment chamber to maintain the humidity and temperature of the heat treatment chamber; two stirring devices are arranged in the mixing chamber, and the two stirring shafts are arranged horizontally, respectively arranged on two opposite sides of the mixing chamber.

[0012] Optionally, the paddle device includes a feed pipe and a plurality of paddles, the feed pipe is vertically arranged and hollow inside, and an openable discharge plate is provided at the bottom for conveying raw materials to a material tray below; the paddles are arranged on the outer side wall of the bottom of the feed pipe;

[0013] The top of the feeding pipe passes through the top surface of the spray chamber and is connected to the driving motor above the main processing tower to drive the stirring paddle to rotate and stir the wood raw materials in the material tray below.

[0014] Further optionally, the part of the feed pipe outside the main processing tower is provided with a feed branch pipe, which has openings at both ends and is hollow inside, the bottom end of the feed branch pipe is fixedly connected to the feed pipe, and the top end of the feed branch pipe is detachably connected to the feed hopper, which is used to input raw materials into the material tray through the feed branch pipe and the feed pipe.

[0015] Optionally, a plurality of horizontal tracks are sequentially arranged on the side wall of the spray chamber from top to bottom, the horizontal tracks are circular, and the lowest horizontal track is not lower than the height of the spray pipe;

[0016] A plurality of vertical tracks are evenly arranged on the side walls of the spray room, the upper parts of the vertical tracks can be connected to all the horizontal tracks, and the vertical tracks extend to the bottom of the spray room.

[0017] Further optionally, a plurality of sliders are slidably connected to the horizontal track, and the sliders can slide along the horizontal track and the vertical track; the outer side surface of the slider is fixedly connected to a supporting component 1 for supporting the material tray.

[0018] Further optionally, the supporting component 1 includes a fixing component 1 and a rotating component 1, the fixing component 1 is horizontally arranged, one end of the fixing component 1 is connected to the outer side surface of the slider, and the other end is hinged to one end of the rotating component 1, and the other end of the rotating component 1 is a free end;

[0019] A telescopic pin is provided on the lower surface of the supporting member. When the telescopic pin is shortened, the telescopic pin is located below the fixed member and does not support the rotating member. At this time, the rotating member is turned to a vertical state with the free end pointing downward. When the telescopic pin is extended, it extends to the bottom of the rotating member and can support the rotating member to maintain a horizontal state.

[0020] When the rotating member 1 is horizontal, an upwardly protruding positioning column 1 is provided on the upper surface thereof for temporarily placing and fixing the material tray.

[0021] Optionally, the material tray is composed of a plurality of fan-shaped sub-trays, and a vertical baffle is provided on the arc-shaped side of the sub-tray close to the inner wall of the main processing tower; an upwardly recessed mounting hole is provided on the lower surface of the sub-tray corresponding to the position of the positioning column one, which is used to dock with the positioning column one.

[0022] Further optionally, two straight sides of two adjacent sub-disks that can dock with each other are provided with a connecting mechanism, the connecting mechanism includes a retractable locking tongue and a locking hole, the straight side of one sub-disk is provided with an inwardly recessed slot forming a locking hole, and the straight side of the other sub-disk is provided with a retractable locking tongue, and the positions of the locking tongue and the locking hole correspond; a locking tongue is provided on the same side of all sub-disks, and a locking hole is provided on the same other side of all sub-disks.

[0023] Optionally, step S1 includes:

[0024] (1) Each sub-plate of the same material plate on the bottom horizontal track moves along the horizontal track to the vertical track driven by the corresponding sliders. Each sub-plate corresponds to a vertical track, and the slider slides down along the vertical track to the bottom of the toggle device;

[0025] (2) The telescopic pin 1 extends to push the rotating part 1 and the sub-disc to a horizontal state; then, the lock tongue extends outward and extends into the corresponding lock hole to connect the sub-discs into a complete material tray;

[0026] (3) The feed branch pipe is connected to the feed hopper, and the raw materials are transported to the material tray through the feed pipe; then the feed branch pipe is disconnected from the feed hopper, the discharge plate of the feed pipe is closed, and the bottom end of the feed pipe is sealed;

[0027] (4) The driving motor drives the paddle to rotate through the material conveying pipe, and the slider adjusts the upper and lower positions of the material tray so that the paddle gradually spreads the raw materials evenly on the material tray;

[0028] (5) The spray device sprays phosphoric acid solution onto the material tray below, and while spraying, the paddle is continuously rotated to turn the raw materials;

[0029] (6) When a liquid layer appears at the bottom of the material tray, stop spraying and stop rotating the feed pipe.

[0030] Optionally, the inner wall of the heat treatment chamber is provided with a plurality of layers of placement mechanisms from top to bottom, the placement mechanisms comprising a plurality of support components 2, and the plurality of support components 2 are evenly distributed along the circumference of the heat treatment chamber;

[0031] The structure of the supporting component 2 is the same as that of the supporting component 1, that is, the supporting component 2 includes a fixed component 2 and a rotating component 2, the fixed component 2 is horizontally arranged, one end of the fixed component 2 is connected to the wall of the heat treatment chamber, and the other end is hinged to one end of the rotating component 2, and the other end of the rotating component 2 is a free end;

[0032] A second telescopic pin is provided on the lower surface of the second supporting member. When the second telescopic pin is shortened, the second telescopic pin is only located below the second fixed member and does not support the second rotating member. At this time, the second rotating member is turned to a vertical state with the free end pointing downward. When the second telescopic pin is extended, it extends to the bottom of the second rotating member and can support the second rotating member to maintain a horizontal state.

[0033] When the rotating member 2 is horizontal, an upper surface is provided with a positioning column 2 protruding upwards, which is used for temporarily placing and fixing the material tray.

[0034] Optionally, step S2 includes:

[0035] (a) After the spraying in the spray chamber stops, the transfer device moves down, the gripper grabs the top of the vertical baffle of the material tray, lifts the material tray up, and pulls out the positioning column 1 from all the mounting holes; then, the telescopic pin 1 contracts, and the rotating part 1 naturally droops. At this time, there is a gap between the outer edge of the material tray and the fixed part 2, which does not block the material tray from moving down;

[0036] (b) The first partition is opened, and the transfer device drives the material tray to move downward and enter the heat treatment chamber; at this time, only the telescopic pin 2 of the bottom layer is in an extended state, so that the corresponding rotating member 2 is horizontal, and the transfer device buckles each mounting hole of the material tray on the positioning column 2 of the rotating member 2 of the bottom layer, thereby fixing the material tray and the placement mechanism;

[0037] (c) The gripper of the transfer device is released and moves upward to return to the spray chamber to reset, and the first partition is closed; then, the heating component starts heating, and the spray component sprays water mist into the heat treatment chamber to maintain the temperature and humidity in the heat treatment chamber.

[0038] Optionally, step S3 includes:

[0039] (i) When the material in the material tray at the bottom of the heat treatment chamber has completed the heating and moisturizing treatment, the second partition is opened; the locking tongues of the material tray are retracted and disengaged from the corresponding locking holes, the telescopic pin 2 is retracted, the rotating member 2 naturally droops, the sub-discs of the material tray are separated from each other, and droop along with the rotating member 2, and the material in the tray falls into the mixing chamber;

[0040] (ii) the second partition is closed, and two stirring devices in the mixing chamber stir the phosphoric acid solution and the material; the mixing chamber processes the material in batches, processing the material in one material tray at a time;

[0041] (iii) When a batch of materials is processed, the discharge port at the bottom of the mixing chamber is opened to discharge the solution and materials, which are then filtered and separated to obtain pre-treated wood materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a pre-treatment device;

[0043] Figure 2 Schematic diagram of a top view of a material tray;

[0044] Figure 3 is a schematic diagram of a connecting mechanism for a sub-disk;

[0045] Figure 4 It is a schematic diagram of a supporting member 1 when it is completely horizontal;

[0046] Figure 5 This is a schematic diagram when the supporting component 2 does not support the material tray;

[0047] Figure 6is a schematic diagram of the auxiliary stirring section;

[0048] Figure 7 is a side view schematic diagram of the auxiliary stirring portion;

[0049] Figure 8 It is a schematic diagram of the structure of the transmission device.

[0050] In the attached drawings, 1-processing main tower, 2-spraying chamber, 3-heat treatment chamber, 4-mixing chamber, 5-spraying device, 6-material tray, 7-first partition, 8-second partition, 9-stirring device, 10-feeding pipe, 11-paddle, 12-feeding branch pipe, 13-feeding hopper, 14-horizontal track, 15-vertical track, 16-slider, 17-support component one, 18-support component two, 19-fixing part one, 20-fixing part Fixed part 2, 21-rotating part 1, 22-rotating part 2, 23-telescopic pin 1, 24-telescopic pin 2, 25-positioning column 1, 26-positioning column 2, 27-installation hole, 28-dividing plate, 29-vertical baffle, 30-locking tongue, 31-locking hole, 32-upper support ring, 33-lower support ring, 34-transfer rod, 35-end stirring paddle, 36-center rope, 37-support rope, 38-stirring net, 39-auxiliary rope. DETAILED DESCRIPTION

[0051] This embodiment provides a pretreatment method for treating wood by phosphoric acid method, comprising:

[0052] S1: Use wood that has been crushed into fine particles as raw material, spread the raw material evenly, then spray phosphoric acid solution on the raw material to wet the raw material, and evenly stir the raw material while spraying until a liquid layer appears at the bottom of the container containing the raw material;

[0053] S2: heating and moisturizing the raw material and the container after being fully moistened in step S1, maintaining the humidity environment while heating;

[0054] S3: putting the material treated in step S2 into a phosphoric acid solution, stirring and mixing, and the solid material after filtering is the pretreated wood material.

[0055] In order to cooperate with the above method, this embodiment also provides a pre-processing device, such as Figure 1-Figure 8 As shown, it includes a main processing tower 1, which is cylindrical and includes a spray chamber 2, a heat treatment chamber 3 and a mixing chamber 4 from top to bottom. A spray device 5, a rotatable toggle device and a separable material tray 6 are arranged in the spray chamber 2 from top to bottom. A first openable partition 7 is arranged between the spray chamber 2 and the heat treatment chamber 3, and a second openable partition 8 is arranged between the heat treatment chamber 3 and the mixing chamber 4, which is used to transfer the material tray 6 and the material between the chambers.

[0056] A heating component and a spray component are provided in the heat treatment chamber 3 to maintain the humidity and temperature of the heat treatment chamber 3 ; two stirring devices 9 are provided in the mixing chamber 4 , and the two stirring shafts are both horizontally arranged, respectively arranged on two opposite sides of the mixing chamber 4 .

[0057] Optionally, a spray device 5 is provided at the upper portion of the spray chamber 2, and the spray device 5 includes a plurality of circular concentrically arranged spray pipes, the diameter of the spray pipes gradually decreases from the outside to the inside, and a plurality of nozzles are evenly arranged on the lower surface of the spray pipes for spraying the phosphoric acid solution downward; connecting pipes are connected between adjacent spray pipes for transmitting the phosphoric acid solution; the outermost circle of spray pipes is connected to a main pipe, which passes through the side wall of the spray device 5 and is then connected to an external phosphoric acid solution storage tank.

[0058] Preferably, all the spray pipes are at the same height, and the diameter of the outermost spray pipe is not larger than the diameter of the closed material tray 6, so that the closed material tray 6 below the spray pipe can be sprayed with phosphoric acid solution.

[0059] Optionally, the paddle device includes a feed pipe 10 and a plurality of paddles 11, the feed pipe 10 is vertically arranged and hollow inside, and an openable discharge plate is provided at the bottom for conveying raw materials to the material tray 6 below; the paddle 11 is arranged on the outer side wall of the bottom of the feed pipe 10, and the plurality of paddles 11 are evenly arranged along the circumference of the feed pipe 10;

[0060] The top of the feeding pipe 10 passes through the center of the spray device 5, and then passes through the top surface of the spray chamber 2, and is connected to the driving motor above the main processing tower 1, which is used to drive the stirring paddle 11 to rotate and stir the wood raw materials in the material tray 6 below.

[0061] Further optionally, the portion of the feed pipe 10 outside the main processing tower 1 is provided with a feed branch pipe 12, the two ends of the feed branch pipe 12 are open and the interior is hollow, the bottom end of the feed branch pipe 12 is fixedly connected to the feed pipe 10, and the top end of the feed branch pipe 12 is detachably connected to a feed hopper 13, which is used to feed raw materials into the material tray 6 through the feed branch pipe 12 and the feed pipe 10. The bottom opening of the feed hopper 13 is provided with a valve, and the top of the feed branch pipe 12 is connected below the valve.

[0062] Optionally, a plurality of horizontal tracks 14 are sequentially arranged on the side wall of the spray chamber 2 from top to bottom, the horizontal tracks 14 are circular, and the lowest horizontal track 14 is not lower than the height of the spray pipe;

[0063] A plurality of vertical tracks 15 are evenly arranged on the side wall of the spray chamber 2 . The upper part of the vertical track 15 can be connected to all the horizontal tracks 14 . The vertical track 15 extends to the bottom of the spray chamber 2 .

[0064] Further optionally, a plurality of sliders 16 are slidably connected to the horizontal track 14 , and the sliders 16 can slide along the horizontal track 14 and the vertical track 15 ; the outer side of the slider 16 is fixedly connected to a supporting component 17 for supporting the material tray 6 .

[0065] Further optionally, the supporting member 17 includes a fixing member 19 and a rotating member 21, the fixing member 19 is horizontally arranged, one end of the fixing member 19 is connected to the outer side of the slider 16, and the other end is hinged to one end of the rotating member 21, and the other end of the rotating member 21 is a free end;

[0066] A telescopic pin 23 is provided on the lower surface of the supporting member 17. When the telescopic pin 23 is shortened, the telescopic pin 23 is only located below the fixed member 19 and does not support the rotating member 21. At this time, the rotating member 21 is turned to a vertical state with the free end pointing downward. When the telescopic pin 23 is extended, it extends to the bottom of the rotating member 21 and can support the rotating member 21 to maintain a horizontal state.

[0067] When the rotating member 21 is horizontal, an upwardly protruding positioning column 25 is provided on the upper surface thereof for temporarily placing and fixing the material tray 6 .

[0068] Optionally, the material tray 6 is composed of a plurality of fan-shaped sub-trays 28, and a vertical baffle 29 is provided on the curved side of the sub-tray 28 close to the inner wall of the main processing tower 1, and the vertical baffle 29 has an arc consistent with the corresponding sub-tray 28. When a plurality of sub-trays 28 form a circular material tray 6, each vertical baffle 29 also forms a circle; an upwardly recessed mounting hole 27 is provided on the lower surface of the sub-tray 28 corresponding to the position of the positioning column 25, which is used for docking with the positioning column 25, so as to temporarily install the sub-tray 28 on the support component 17.

[0069] Further optionally, two linear sides of two adjacent sub-disks 28 that can dock with each other are provided with a connecting mechanism, the connecting mechanism including a retractable locking tongue 30 and a locking hole 31, the linear side of one sub-disk 28 is provided with an inwardly recessed empty groove, forming a locking hole 31, the linear side of the other sub-disk 28 is also provided with an inwardly recessed empty groove, in which a locking tongue 30 is provided, and the positions of the locking tongue 30 and the locking hole 31 correspond; a locking tongue 30 is provided on the same side of all sub-disks 28, and a locking hole 31 is provided on the same other side of all sub-disks 28.

[0070] All the slide blocks 16, telescopic pins 23, and locking tongues 30 of the connecting mechanisms can be electromagnetically controlled, and the communication connection is processed by the control device outside the main tower 1 to control the movement of each component.

[0071] Initially, each sub-disc 28 of the same material tray 6 is separated, the locking tongue 30 is retracted into the sub-disc 28, each sub-disc 28 is connected to the corresponding support component 17 through the positioning column 1 25 and the mounting hole 27, and the telescopic pin 1 23 is shortened, so that the rotating part 1 21 and the sub-disc 28 are both in a vertical state and hung on the edge of the fixing part 19. The slider 16 is connected to the corresponding sub-disc 28 through the support component 17, and the slider 16 is on the horizontal track 14. The sub-discs 28 of the same material tray 6 are on the same horizontal track 14; all material trays 6 have the same size, and according to the size of the sub-disc 28, one horizontal track 14 can hold the sub-discs 28 of multiple material trays 6.

[0072] Optionally, step S1 includes:

[0073] (1) Each sub-tray 28 of the same material tray 6 on the lowest horizontal track 14 is driven by the corresponding slider 16 to move along the horizontal track 14 to the vertical track 15. Each sub-tray 28 corresponds to a vertical track 15. The slider 16 slides down along the vertical track 15 to the bottom of the toggle device;

[0074] (2) The telescopic pin 23 is extended to push the rotating member 21 and the sub-disc 28 to a horizontal state; then, the locking tongue 30 extends outward and extends into the corresponding locking hole 31, connecting the sub-disc 28 to form a complete material tray 6;

[0075] (3) The feed branch pipe 12 is connected to the feed hopper 13, and the raw materials are transported to the material tray 6 through the feed pipe 10; then the feed branch pipe 12 is disconnected from the feed hopper 13, and the discharge plate of the feed pipe 10 is closed, sealing the bottom end of the feed pipe 10;

[0076] (4) The driving motor drives the paddle 11 to rotate through the material conveying pipe 10, and the slider 16 adjusts the upper and lower positions of the material tray 6 so that the paddle 11 gradually spreads and evenly spreads the raw materials on the material tray 6;

[0077] (5) The spray device 5 sprays phosphoric acid solution onto the material tray 6 below, and while spraying, the paddle 11 is continuously rotated to turn the raw materials;

[0078] (6) When a liquid layer appears at the bottom of the material tray 6, the spraying and the rotation of the feed pipe 10 are stopped.

[0079] In step (4), since the material tray 6 has a certain thickness, after the raw materials are spread out, a material layer is formed on the material tray 6, and the sprayed phosphoric acid solution preferentially wets the topmost surface layer of the raw materials; in step (5), the paddle 11 can directly change the horizontal position of the raw material particles. Since one side of the raw material particles always has a certain curvature, when they are pushed to translate, they will roll at different lengths, so that different surfaces of the raw materials face upward and can receive phosphoric acid. At the same time, translation and rolling are beneficial to the position change of particles at different positions of the upper, middle and lower parts, so that different layers of raw materials can be alternately flipped to the top layer and receive phosphoric acid.

[0080] Further optionally, the bottom of the vertical baffle 29 is made of a transparent material to facilitate observation of the liquid layer height.

[0081] Optionally, the inner wall of the heat treatment chamber 3 is provided with a plurality of layers of placement mechanisms from top to bottom, the placement mechanisms comprising a plurality of support components 18, and the plurality of support components 18 are evenly distributed along the circumference of the heat treatment chamber 3;

[0082] The structure of the second supporting member 18 is the same as that of the first supporting member 17, that is, the second supporting member 18 includes a second fixing member 20 and a second rotating member 22, the second fixing member 20 is horizontally arranged, one end of the second fixing member 20 is connected to the inner wall of the heat treatment chamber 3, and the other end is hinged to one end of the second rotating member 22, and the other end of the second rotating member 22 is a free end;

[0083] A second telescopic pin 24 is provided on the lower surface of the second supporting member 18. When the second telescopic pin 24 is shortened, the second telescopic pin 24 is only located below the second fixed member 20 and does not support the second rotating member 22. At this time, the second rotating member 22 is turned to a vertical state with the free end pointing downward. When the second telescopic pin 24 is extended, it extends to the bottom of the second rotating member 22 and can support the second rotating member 22 to maintain a horizontal state.

[0084] When the second rotating member 22 is horizontal, a second positioning column 26 protruding upward is provided on the upper surface thereof for temporarily placing and fixing the material tray 6 .

[0085] Optionally, the main processing tower 1 further includes a transfer device, which includes an upper support ring 32, a lower support ring 33 and a plurality of transfer rods 34, wherein the upper support ring 32 is arranged above the outside of the main processing tower 1, and the lower support ring 33 is located inside the main processing tower 1, and the upper and lower positions of the upper support ring 32 and the lower support ring 33 correspond vertically, so that the transfer rods 34 remain vertical;

[0086] A plurality of transfer rods 34 are evenly distributed along the circumference of the upper support ring 32. The top of the transfer rod 34 passes through the main processing tower 1 and is connected to the upper support ring 32. The lower part of the transfer rod 34 is connected to the lower support ring 33. The bottom end of the transfer rod 34 is provided with an openable and closable gripper for temporarily grabbing the material tray 6.

[0087] The upper support ring 32 is connected to the telescopic driving device, which is used to control the transfer device to move up and down, so as to realize the movement of the material tray 6 between the spray chamber 2 and the heat treatment chamber 3.

[0088] The position of the supporting component 2 18 of each layer placement mechanism corresponds to the position of the supporting component 1 17 one by one.

[0089] Initially or when the transfer device is not used, the bottom end of the transfer rod 34 is above the spray device 5 to avoid being affected by the acid solution. All telescopic pins 24 and grippers can be electromagnetically controlled, and the communication connection is processed by the control device outside the main tower 1 to control the movement of each component.

[0090] Optionally, step S2 includes:

[0091] (a) After the spraying in the spray chamber 2 stops, the transfer device moves downward, the gripper grabs the top of the vertical baffle 29 of the material tray 6, lifts the material tray 6, and pulls out the positioning column 1 25 from all the mounting holes 27; then, the telescopic pin 1 23 contracts, and the rotating part 1 21 droops naturally. At this time, there is a gap between the outer edge of the material tray 6 and the fixing part 2 20, which does not prevent the material tray 6 from moving downward;

[0092] (b) The first partition plate 7 is opened, and the transfer device drives the material tray 6 to move downward and enter the heat treatment chamber 3; at this time, only the telescopic pin 24 of the lowest layer is in an extended state, so that the corresponding rotating member 22 is horizontal, and the transfer device buckles each mounting hole 27 of the material tray 6 on the positioning column 26 of the rotating member 22 of the lowest layer, thereby fixing the material tray 6 and the placement mechanism;

[0093] (c) The gripper of the transfer device is released and moves upward to return to the spray chamber 2 to reset, and the first partition 7 is closed; then, the heating component starts heating, and the spray component sprays water mist into the heat treatment chamber 3 to maintain the temperature and humidity in the heat treatment chamber 3.

[0094] Further optionally, a thermometer and a hygrometer are provided in the heat treatment chamber 3 , and the heating component, the spray component, the thermometer and the hygrometer are all connected to an external control device for controlling the temperature and humidity in the heat treatment chamber 3 .

[0095] After the first material tray 6 enters the heat treatment chamber 3, the slider 16 corresponding to the bottommost sub-tray 28 in the spray chamber 2 moves to the vertical track 15, and the steps (1)-(6) are repeated to combine the second material tray 6 and spray and wet the next tray of raw materials. After the second material tray 6 is wetted, steps (a)-(c) are repeated to place the second material tray 6 on a layer of placement mechanism above the first material tray 6, so that the material trays 6 in the heat treatment chamber 3 do not touch each other. This is repeated until all placement mechanisms in the heat treatment chamber 3 are placed with material trays 6.

[0096] Optionally, step S3 includes:

[0097] (i) When the material in the material tray 6 at the bottom of the heat treatment chamber 3 has completed the heating and moisturizing treatment, the second partition 8 is opened; the locking tongues 30 of the material tray 6 are retracted and disengaged from the corresponding locking holes 31, the second telescopic pin 24 is retracted, the second rotating member 22 droops naturally, the sub-discs 28 of the material tray 6 are separated from each other, and droop along with the second rotating member 22, and the material in the tray falls into the mixing chamber 4;

[0098] (ii) the second partition 8 is closed, and the two stirring devices 9 in the mixing chamber 4 stir the phosphoric acid solution and the material; the mixing chamber 4 processes the material in batches, processing the material in one material tray 6 at a time;

[0099] (iii) When a batch of materials is processed, the discharge port at the bottom of the mixing chamber 4 is opened to discharge the solution and materials, which are then filtered and separated to obtain pre-treated wood materials.

[0100] Further optionally, in step (iii), the acid solution obtained after filtration is recovered and used to prepare the phosphoric acid solution, which is sprayed or mixed again; the pretreated wood material can be subjected to subsequent carbonization, activation and other processes.

[0101] The material trays 6 in the heat treatment chamber 3 are separated in sequence from bottom to top and the materials in the trays are poured into the mixing chamber 4, and then the separated trays 28 are hung in the heat treatment chamber 3 until all the material trays 6 are separated and the materials are poured. At this time, the trays 28 in the spray chamber 2 are also used up and need to be recovered.

[0102] The placement mechanism corresponding to the top material tray 6 in the heat treatment chamber 3, the telescopic pin 24 is extended, and the rotating part 22 and the sub-disc 28 are lifted; the locking tongue 30 extends and extends into the corresponding locking hole 31, connecting the sub-disc 28 into a complete material tray 6, the transfer device moves down, the gripper grabs the top of the vertical baffle 29 of the material tray 6, lifts the material tray 6, and pulls out the positioning column 26 from all the mounting holes 27, and the transfer device drives the material tray 6 to rise into the spray chamber 2; at this time, there is at least one circle of supporting components 17 in the vertical track 15, and all the rotating parts 17 and 18 are in a drooping state, the transfer device leads the material tray 6 to move up to the top of the uppermost circle of support components 17 in the vertical track 15, the rotating member 21 of this circle of support components 17 returns to the horizontal level, the transfer device installs the material tray 6 on the positioning column 25 of this circle of support components 17, and the transfer device moves up and resets; the connecting mechanism of the material tray 6 is loosened, the rotating member 21 of this circle of support components 17 droops, and the distribution is separated, and the slider 16 drives the corresponding sub-disc 28 to return to the uppermost horizontal track 14 along the vertical track 15.

[0103] According to the method, the material tray 6 is advanced from top to bottom to the vertical track 15 of the spray chamber 2. After the separation tray 28 is separated, when the slider 16 is reset, it returns to the horizontal track 14 in a top-to-bottom order to realize the recovery of the material tray 6.

[0104] Optionally, the stirring device 9 is a conventional horizontal stirrer, the rotating motor is arranged on the outer wall of the mixing chamber 4, the rotating shaft of the rotating motor is connected to the corresponding stirring shaft, a plurality of stirring paddles are evenly arranged on the stirring shaft, and a circle of a plurality of end stirring paddles 35 are evenly arranged at one end of the stirring shaft away from the inner wall of the mixing chamber 4.

[0105] Optionally, an auxiliary stirring part is provided between the two stirring devices, and the auxiliary stirring part includes a central rope 36, a plurality of supporting ropes 37 and a plurality of stirring nets 38, the two ends of the central rope 36 are respectively connected to the ends of the stirring shafts on both sides, the supporting ropes 37 correspond one to one with the end stirring paddles 35 on either side, the two ends of the supporting ropes 37 are respectively connected to the ends of the end stirring paddles 35 on both sides away from the stirring shaft, and the central rope 36 is parallel to the supporting ropes 37;

[0106] A plurality of stirring ropes are evenly crossed horizontally and vertically between the central rope 36 and each supporting rope 37 , forming a plurality of stirring nets 38 around the central rope 36 .

[0107] Further optionally, an auxiliary rope 39 is provided at the node of the horizontal and vertical stirring ropes of the stirring net 38, one end of the auxiliary rope 39 is connected to the stirring net 38, and the other end is a free end, which can float in the mixing chamber 4 as the auxiliary stirring part rotates;

[0108] Along the radial direction of the auxiliary stirring part, from outside to inside, the length of the auxiliary rope 39 is gradually shortened. Not every node is provided with an auxiliary rope 39, and the spacing between the auxiliary ropes 39 is reasonably set to avoid the auxiliary ropes 39 from being entangled with each other.

[0109] The traditional stirring device is vertical. The mixing chamber 4 of the present invention is not suitable for vertical stirring, but horizontal stirring. Horizontal stirring is to flip the mixed liquid in the vertical direction, which consumes more energy than vertical stirring. The present invention is divided into two horizontal stirring devices, and there is a gap between the two, which can minimize energy consumption. For the stirring of the interval area, the present invention adopts the auxiliary stirring part to perform. The auxiliary stirring part is composed of a flexible rope, has a light weight, and the energy consumption required to drive the auxiliary stirring part to rotate is not high.

[0110] The central rope 36 and the supporting rope 37 of the auxiliary stirring part are the extensions of the stirring area, so that the auxiliary stirring part occupies the above-mentioned space. The supporting rope 37 and the stirring net 38 both play a stirring role. Moreover, for the mixing of granular materials and acid liquid, the stirring net 38 is more suitable than the traditional stirring paddle. The coverage density of the stirring net 38 is higher, and a multi-dimensional and richer stirring form is formed for the liquid, so that the mixing effect of the material and the acid liquid is better, the treatment is more complete, and the efficiency is higher.

[0111] The present invention utilizes the characteristics of flexible ropes and arranges auxiliary ropes 39 between the stirring nets 38 to enrich the stirring dimensions. The auxiliary ropes 39 are particularly suitable for stirring small-size materials. Moreover, the auxiliary ropes 39 can follow the rotation of the auxiliary stirring part, and the free ends of the auxiliary ropes 39 float clockwise or counterclockwise, which is not easy to get tangled.

Claims

1. A method for pretreating wood by phosphoric acid treatment, characterized in that: include: S1: Use wood that has been crushed into fine particles as raw material, spread the raw material evenly, then spray phosphoric acid solution on the raw material to wet the raw material, and evenly stir the raw material while spraying until a liquid layer appears at the bottom of the container containing the raw material; S2: heating and moisturizing the raw material and the container after being fully moistened in step S1, maintaining the humidity environment while heating; S3: putting the material treated in step S2 into a phosphoric acid solution, stirring and mixing, and the solid material after filtering is the pretreated wood material.

2. The method for pretreating wood by phosphoric acid treatment according to claim 1, characterized in that: The pretreatment method uses a pretreatment device, which includes a main treatment tower, which is cylindrical and includes a spray chamber, a heat treatment chamber and a mixing chamber from top to bottom. The spray chamber is provided with a spray device, a rotatable toggle device and a separable material tray from top to bottom. A first partition that can be opened and closed is provided between the spray chamber and the heat treatment chamber, and a second partition that can be opened and closed is provided between the heat treatment chamber and the mixing chamber, which is used to transfer the material tray and the material between the chambers. A heating component and a spray component are arranged in the heat treatment chamber to maintain the humidity and temperature of the heat treatment chamber; two stirring devices are arranged in the mixing chamber, and the two stirring shafts are arranged horizontally, respectively arranged on two opposite sides of the mixing chamber.

3. The method for pretreating wood by phosphoric acid treatment according to claim 2, characterized in that: The paddle device includes a feed pipe and a plurality of paddles. The feed pipe is vertically arranged and hollow inside. An openable discharge plate is provided at the bottom for conveying raw materials to the material tray below. The paddles are arranged on the outer side wall of the bottom of the feed pipe. The top of the conveying pipe passes through the top surface of the spray chamber and is connected to the driving motor above the main processing tower to drive the paddle to rotate and stir the wood raw materials in the material tray below; A feed branch pipe is provided on the part of the feed pipe outside the main processing tower. The bottom end of the feed branch pipe is fixedly connected to the feed pipe, and the top end of the feed branch pipe is detachably connected to the feed hopper.

4. The method for pretreating wood by phosphoric acid treatment according to claim 3, characterized in that: A plurality of horizontal tracks are arranged on the side wall of the spray chamber from top to bottom, the horizontal tracks are circular, and the lowest horizontal track is not lower than the height of the spray pipe; A plurality of vertical tracks are evenly arranged on the side walls of the spray room, the upper parts of the vertical tracks can be connected to all the horizontal tracks, and the vertical tracks extend to the bottom of the spray room.

5. The method for pretreating wood by phosphoric acid treatment according to claim 4, characterized in that: A plurality of sliders are slidably connected to the horizontal track, and the sliders can slide along the horizontal track and the vertical track; the outer side of the slider is fixedly connected to the supporting component 1 for supporting the material tray; The supporting component 1 includes a fixed component 1 and a rotating component 1, the fixed component 1 is horizontally arranged, one end of the fixed component 1 is connected to the outer side surface of the slider, and the other end is hinged to one end of the rotating component 1, and the other end of the rotating component 1 is a free end; A telescopic pin is provided on the lower surface of the supporting member. When the telescopic pin is shortened, the telescopic pin is located below the fixed member and does not support the rotating member. At this time, the rotating member is turned to a vertical state with the free end pointing downward. When the telescopic pin is extended, it extends to the bottom of the rotating member and can support the rotating member to maintain a horizontal state. When the rotating member 1 is horizontal, an upwardly protruding positioning column 1 is provided on the upper surface thereof for temporarily placing and fixing the material tray.

6. The method for pretreating wood by phosphoric acid treatment according to claim 5, characterized in that: The material tray is composed of a plurality of fan-shaped sub-discs, and a vertical baffle is provided on the arc-shaped side of the sub-disc close to the inner wall of the main processing tower; an upwardly concave mounting hole is provided on the lower surface of the sub-disc corresponding to the position of the positioning column 1, which is used to dock with the positioning column 1; Two linear sides of two adjacent sub-disks that can butt against each other are provided with a connecting mechanism, the connecting mechanism comprising a retractable locking tongue and a locking hole, a linear side of one sub-disk is provided with an inwardly recessed slot forming a locking hole, a linear side of the other sub-disk is provided with a retractable locking tongue, the positions of the locking tongue and the locking hole correspond; a locking tongue is provided on the same side of all sub-disks, and a locking hole is provided on the same other side of all sub-disks.

7. The method for pretreating wood by phosphoric acid treatment according to claim 6, characterized in that: Step S1 includes: (1) Each sub-plate of the same material plate on the bottom horizontal track moves along the horizontal track to the vertical track driven by the corresponding sliders. Each sub-plate corresponds to a vertical track, and the slider slides down along the vertical track to the bottom of the toggle device; (2) The telescopic pin 1 extends to push the rotating part 1 and the sub-disc to a horizontal state; then, the lock tongue extends outward and extends into the corresponding lock hole to connect the sub-discs into a complete material tray; (3) The feed branch pipe is connected to the feed hopper, and the raw materials are transported to the material tray through the feed pipe; then the feed branch pipe is disconnected from the feed hopper, the discharge plate of the feed pipe is closed, and the bottom end of the feed pipe is sealed; (4) The driving motor drives the paddle to rotate through the material conveying pipe, and the slider adjusts the upper and lower positions of the material tray so that the paddle gradually spreads the raw materials evenly on the material tray; (5) The spray device sprays phosphoric acid solution onto the material tray below, and while spraying, the paddle is continuously rotated to turn the raw materials; (6) When a liquid layer appears at the bottom of the material tray, stop spraying and stop rotating the feed pipe.

8. The method for pretreating wood by phosphoric acid treatment according to claim 7, characterized in that: The inner wall of the heat treatment chamber is provided with a plurality of layers of placement mechanisms from top to bottom, and the placement mechanisms include a plurality of supporting components 2; The supporting component 2 includes a fixed component 2 and a rotating component 2, the fixed component 2 is horizontally arranged, one end of the fixed component 2 is connected to the inner wall of the heat treatment chamber, and the other end is hinged to one end of the rotating component 2, and the other end of the rotating component 2 is a free end; A second telescopic pin is provided on the lower surface of the second supporting member. When the second telescopic pin is shortened, the second telescopic pin is only located below the second fixed member and does not support the second rotating member. At this time, the second rotating member is turned to a vertical state with the free end pointing downward. When the second telescopic pin is extended, it extends to the bottom of the second rotating member and can support the second rotating member to maintain a horizontal state. When the rotating member 2 is horizontal, an upper surface is provided with a positioning column 2 protruding upwards, which is used for temporarily placing and fixing the material tray.

9. The method for pretreating wood by phosphoric acid treatment according to claim 8, characterized in that: Step S2 includes: (a) After the spraying in the spray chamber stops, the transfer device moves down, the gripper grabs the top of the vertical baffle of the material tray, lifts the material tray up, and pulls out the positioning column 1 from all the mounting holes; then, the telescopic pin 1 contracts, and the rotating part 1 naturally droops. At this time, there is a gap between the outer edge of the material tray and the fixed part 2, which does not block the material tray from moving down; (b) The first partition is opened, and the transfer device drives the material tray to move downward and enter the heat treatment chamber; at this time, only the telescopic pin 2 of the bottom layer is in an extended state, so that the corresponding rotating member 2 is horizontal, and the transfer device buckles each mounting hole of the material tray on the positioning column 2 of the rotating member 2 of the bottom layer, thereby fixing the material tray and the placement mechanism; (c) The gripper of the transfer device is released and moves upward to return to the spray chamber to reset, and the first partition is closed; then, the heating component starts heating, and the spray component sprays water mist into the heat treatment chamber to maintain the temperature and humidity in the heat treatment chamber.

10. The method for pretreating wood by phosphoric acid treatment according to claim 9, characterized in that: Step S3 includes: (i) When the material in the material tray at the bottom of the heat treatment chamber has completed the heating and moisturizing treatment, the second partition is opened; the locking tongues of the material tray are retracted and disengaged from the corresponding locking holes, the telescopic pin 2 is retracted, the rotating member 2 naturally droops, the sub-discs of the material tray are separated from each other, and droop along with the rotating member 2, and the material in the tray falls into the mixing chamber; (ii) the second partition is closed, and two stirring devices in the mixing chamber stir the phosphoric acid solution and the material; the mixing chamber processes the material in batches, processing the material in one material tray at a time; (iii) When a batch of materials is processed, the discharge port at the bottom of the mixing chamber is opened to discharge the solution and materials, which are then filtered and separated to obtain pre-treated wood materials.

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