Wood chip pretreatment equipment based on composite cellulase and process thereof

Abstract

The invention provides wood chip pretreatment equipment based on composite cellulase and a process of the wood chip pretreatment equipment, and relates to the technical field of wood impregnation. A dipping box is fixed to the left side of the top end face of the base. Through the arrangement of the first mixing assembly and the second mixing assembly, on one hand, when wood chips are mixed, four second electric cylinders are controlled to stretch out and draw back in a reciprocating mode, the four second electric cylinders drive a mixing plate to move up and down in a reciprocating mode, and in the up-down reciprocating movement process of the mixing plate, the wood chips can be mixed; and on the other hand, when the mixing plate reciprocates up and down to achieve mixing, through meshing transmission of the tooth row and the gear, reciprocating rotation of the rotating shaft and the impeller can be achieved, and secondary mixing of the wood chips can be achieved when the impeller rotates in a reciprocating mode. One mixing structure can move up and down to realize mixing, and meanwhile, the other mixing structure is driven to realize mixing synchronously, so that the cost is saved, and the mixing effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of wood impregnation, and in particular to a wood chip pretreatment device based on composite cellulase and a process thereof. Background Art

[0002] In the chemical-mechanical pulping process, the alkali impregnation stage is the process that directly determines the physical strength and optical properties of the pulp. In order to more effectively improve the efficiency of the alkali impregnation stage, the wood chips are usually pretreated to remove some hemicellulose and lignin while protecting carbohydrates as much as possible, increase the porosity and specific surface area of ​​the wood chips, and increase the contact area between the subsequent alkali solution and the wood chips. After impregnation, they need to be bleached.

[0003] As shown in the application number: The present invention provides a wood chip pretreatment process for chemical mechanical pulping of poplar wood and its application, characterized in that: heat-resistant xylanase is used for pretreatment, the enzyme dosage is 5-30U / g, and the enzyme treatment temperature is 60-90°C. The liquid ratio is 1:3.5-4.5, and the temperature is kept for 30-90min. For chemical mechanical pulping of poplar wood, the pretreated poplar wood chips are alkali-impregnated, and then the alkali-impregnated poplar wood chips are bleached with hydrogen peroxide; after pulping, the average fiber length after pulping is more than 1.10mm, and the curl index is 5.25-5.30%. The tear index of the poplar pulp prepared by the pretreatment method of the present invention is 3.72-3.75mN·m2 / g, the tensile strength is 3.75-3.78kN / m, and the whiteness is 70.28-70.32%I SO.

[0004] The wood chip pretreatment device similar to the above application also has the following shortcomings:

[0005] During the impregnation process, the existing device cannot achieve full contact between the enzyme-containing liquid and the wood chips, and the impregnation effect is weak; during the impregnation process, the existing device cannot achieve full contact between the enzyme-containing liquid and the inside of the wood chips through positive and negative treatment, and the impregnation effect is weak.

[0006] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a wood chip pretreatment device and process based on composite cellulase are provided, in order to achieve a more practical purpose. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a wood chip pretreatment device based on composite cellulase and a process thereof, so as to solve the problem that during the impregnation treatment process, the existing device cannot achieve sufficient contact between the enzyme-containing liquid and the wood chips, resulting in a weak impregnation effect; during the impregnation treatment process, the existing device cannot achieve sufficient contact between the enzyme-containing liquid and the inside of the wood chips through positive and negative treatments, resulting in a weak impregnation effect.

[0008] The invention provides a wood chip pretreatment device based on composite cellulase and a process thereof, which specifically comprises: a base; an impregnation box is fixed to the left side of the top surface of the base, a cover plate is fixed on the impregnation box, and an exhaust pipe and a funnel are welded on the cover plate.

[0009] Furthermore, a first mixing assembly is installed in the impregnation box, which is composed of the first mixing assembly, a second electric cylinder, a mixing plate and a through hole. Four second electric cylinders are fixed to the bottom end surface of the inner wall of the impregnation box, and one end of the top of the four second electric cylinders is welded to the mixing plate. The mixing plate is a rectangular plate structure. The outer side of the mixing plate is in contact with the inner wall of the impregnation box, and the top surface of the mixing plate is provided with through holes in a linear array, and the through holes are rectangular hole structures.

[0010] Furthermore, a second mixing assembly is installed in the impregnation box, and the second mixing assembly is composed of a rotating shaft, an impeller, a gear and a gear row. A rotating shaft rotates in the impregnation box, and impellers are welded on the rotating shaft in a linear array. The impellers are located above the mixing plate.

[0011] Furthermore, a gear is welded on the rotating shaft; a tooth row is welded on the top surface of the mixing plate, and the tooth row is meshed with the gear.

[0012] Furthermore, a fixed block is fixed to the left and right end faces of the impregnation box, both of which are rectangular block structures, and two first electric cylinders are fixed to the top surface of each fixed block, and the protruding ends of the four first electric cylinders are fixed to the bottom end face of the cover plate.

[0013] Furthermore, a sealing assembly is installed on the cover plate, and the sealing assembly is composed of a third electric cylinder, a seat body and a sealing ball. Four third electric cylinders are fixed to the bottom end surface of the cover plate, and the lower ends of the two third electric cylinders on the left are welded to a seat body, and the lower ends of the two third electric cylinders on the right are welded to another seat body.

[0014] Furthermore, a sealing ball is welded on each of the seat bodies, and the two sealing balls are respectively located directly below the exhaust pipe and the funnel.

[0015] Furthermore, a discharge assembly is installed on the impregnation box, and the discharge assembly consists of a sleeve, a discharge pipe, a valve, a discharge hole, a sealing gasket, a connecting block and a fourth electric cylinder. A sleeve is welded on the impregnation box, and a discharge pipe slides inside the sleeve. The outer wall of the discharge pipe is provided with discharge holes in a circular array, and the outer wall of the discharge pipe is in contact with the inner wall of the sleeve.

[0016] Furthermore, a valve is fixed on the discharge pipe, and a circular plate is welded on the rear side of the discharge pipe. After welding the circular plate, the rear side of the discharge pipe is in a sealed state. A sealing gasket with a ring-shaped structure is sleeved on the discharge pipe. A connecting block is welded on the discharge pipe. The connecting block is a rectangular block structure. Two fourth electric cylinders are fixed on the rear end face of the connecting block. One end of the rear side of the two fourth electric cylinders is fixed on the front end face of the impregnation box. When the two fourth electric cylinders are extended, the sealing gasket is in elastic contact with the rear end face of the sleeve.

[0017] Furthermore, an air pump is installed on the top surface of the cover plate; a containing box is fixed on the right side of the top surface of the base, and the containing box is connected to the impregnation box through a pipeline.

[0018] A production process of a wood chip pretreatment device based on composite cellulase comprises the following steps:

[0019] 01. The wood chips are crushed by crushing equipment and then put into the impregnation box;

[0020] 02. Add 5-30U / g enzyme into the impregnation box through the funnel, heat the impregnation box through an external heating device, control the temperature at 60-90 degrees, liquid ratio 1:3.5-4.5, and keep warm for 30-90 minutes;

[0021] 03. Control the extension of the four third electric cylinders;

[0022] 04. Control the vacuum pump to pump air. At this time, the impregnation box is in a negative pressure state. Under the influence of negative pressure, the liquid containing enzyme gradually enters the interior of the wood fiber;

[0023] 05. Control the four second electric cylinders to reciprocate and extend, and the four second electric cylinders drive the mixing plate to move up and down. When the mixing plate moves up and down, the enzyme and liquid in the impregnation box can be fully mixed, ensuring the contact effect between the enzyme and the wood fiber, and improving the impregnation effect of the wood fiber;

[0024] 06. Control the vacuum pump to rotate in the opposite direction to achieve pressurization. After the pressurization is completed, control the four third electric cylinders to contract. Driven by the four third electric cylinders, the seal of the vacuum pipe funnel and the two sealing balls can be completed. After pressurization for 30 minutes, the pressure is released;

[0025] 07. After the pressure relief is completed, the impregnated wood fiber can be taken out;

[0026] 08. After completion, the sawdust is scooped out and placed into the storage box 8 for bleaching.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present application, through the arrangement of the first mixing component and the second mixing component, on the one hand, when achieving sawdust mixing, it is sufficient to control the four second electric cylinders to reciprocate and extend, and the four second electric cylinders drive the mixing plate to move reciprocally up and down, and during the reciprocating movement of the mixing plate, the sawdust mixing can be achieved; on the other hand, while the mixing plate moves reciprocatingly up and down to achieve mixing, the reciprocating rotation of the rotating shaft and the impeller can be achieved through the meshing transmission of the tooth row and the gear, and the sawdust can be mixed again when the impeller rotates reciprocatingly. Compared with the existing device, when achieving sawdust mixing, the present device can move one mixing structure up and down to achieve mixing while driving another mixing structure to achieve mixing synchronously, which saves costs and achieves better mixing effect.

[0029] In the present application, through the setting of the first electric cylinder, when the cover is opened, it is sufficient to control the extension of the four first electric cylinders. When the four first electric cylinders are extended, the cover can be lifted up. Compared with the existing device, the present device is more convenient and quick when opening the cover.

[0030] In the present application, a vacuum pump is provided to achieve vacuum and pressurization inside the impregnation box. When the vacuum pump is used to evacuate or pressurize the impregnation box, the liquid containing the enzyme is squeezed. After the liquid is squeezed, it will be pressed into the wood chips. The liquid entering the wood chips can better achieve contact between the enzyme and the wood chips, thereby improving the treatment effect of the wood chips.

[0031] In the present application, the cover plate is provided with a stepped structure, the outer wall of the lower half of the cover plate contacts the inner wall of the dipping barrel, and the step of the cover plate contacts the top surface of the dipping barrel. During use, the sealing performance between the cover plate and the dipping barrel can be improved.

[0032] In the present application, through the setting of the sealing component, on the one hand, the contraction of the four third electric cylinders is controlled. Under the drive of the four third electric cylinders, the sealing of the exhaust pipe and the bottom of the funnel can be completed through two sealing balls. By sealing the exhaust pipe and the bottom of the funnel, it can be ensured that there is no leakage under subsequent negative pressure and positive pressure conditions; on the other hand, the sealing is performed by the sealing ball, so when the impregnating agent is added, after the impregnating agent contacts the sealing ball, no residue will remain on the sealing ball, thereby ensuring the adding effect of the impregnating agent.

[0033] In the present application, by setting up the discharge assembly, the sealing of the discharge pipe can be achieved through the valve, and when the two fourth electric cylinders are controlled to extend, the discharge hole is hidden in the sleeve, and the sealing gasket is elastically in contact with the rear end surface of the sleeve to complete the re-sealing. Compared with the existing device, the present device can achieve double sealing, and can also achieve sealing when the valve is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0035] In the attached picture:

[0036] Figure 1 The axial structural schematic diagram of the wood chip pretreatment process using the composite cellulase according to the present invention is shown;

[0037] Figure 2 The schematic diagram of the axial structure of the wood chip pretreatment process of the composite cellulase according to the present invention after partial sectioning is shown;

[0038] Figure 3 It is shown that according to the present invention Figure 2 Schematic diagram of the main structure;

[0039] Figure 4 The axial structural schematic diagram of the funnel and the sealing assembly according to the present invention is shown;

[0040] Figure 5 It is shown that according to the present invention Figure 4 A schematic diagram of the main structure after being cut apart is provided;

[0041] Figure 6 It shows an axial structural schematic diagram of a first mixing assembly and a second mixing assembly according to the present invention;

[0042] Figure 7 The schematic diagram of the axial structure of the discharge assembly according to the present invention is shown;

[0043] Figure 8 It is shown that according to the present invention Figure 7 Schematic diagram of the axial structure after partial sectioning.

[0044] Reference numerals list

[0045] 1. Base;

[0046] 2. Dipping box; 201. Cover plate; 202. Air extraction pipe; 203. Funnel; 204. Fixing block; 205. First electric cylinder;

[0047] 3. First mixing assembly; 301. Second electric cylinder; 302. Mixing plate; 303. Through hole;

[0048] 4. Second mixing assembly; 401. Rotating shaft; 402. Impeller; 403. Gear; 404. Gear row;

[0049] 5. Sealing assembly; 501. third electric cylinder; 502. seat body; 503. sealing ball;

[0050] 6. Discharge assembly; 601. Casing; 602. Discharge pipe; 603. Valve; 604. Discharge hole; 605. Sealing pad; 606. Connecting block; 607. Fourth electric cylinder;

[0051] 7. Air pump;

[0052] 8. Storage box. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are clearly defined in this way.

[0055] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "one", "one" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, the words "include" or "comprise" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, the spatial and directional terms such as "upper", "lower", "front", "back", "top", "bottom", "vertical" and "horizontal" may be used to describe the embodiments of the present invention, but it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures, and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect", "couple", "fix" and "attach" may refer to the direct connection between two elements or structures without other elements or structures, or may refer to the indirect connection between two elements or structures through an intermediate element or structure, unless otherwise clearly stated in this article.

[0056] Embodiment 1:

[0057] As attached Figure 1 To Attachment Figure 8 As shown:

[0058] The invention provides a wood chip pretreatment device based on composite cellulase and a process thereof, comprising: a base 1; an impregnation box 2 is fixed on the left side of the top surface of the base 1, a cover plate 201 is fixed on the impregnation box 2, and an exhaust pipe 202 and a funnel 203 are welded on the cover plate 201.

[0059] Among them, a first mixing component 3 is installed in the impregnation box 2, which is composed of the first mixing component 3, the second electric cylinder 301, the mixing plate 302 and the through hole 303. Four second electric cylinders 301 are fixed to the bottom end surface of the inner wall of the impregnation box 2, and the upper ends of the four second electric cylinders 301 are welded to the mixing plate 302. The mixing plate 302 is a rectangular plate structure. The outer side of the mixing plate 302 contacts the inner wall of the impregnation box 2. The top surface of the mixing plate 302 is provided with through holes 303 in a linear array. The through holes 303 are rectangular hole structures. When achieving sawdust mixing, the four second electric cylinders 301 can be controlled to reciprocate and extend. The four second electric cylinders 301 drive the mixing plate 302 to reciprocate up and down. In the process of the mixing plate 302 reciprocating up and down, the mixing of sawdust can be achieved.

[0060] Among them, a second mixing component 4 is installed in the impregnation box 2, and the second mixing component 4 is composed of a rotating shaft 401, an impeller 402, a gear 403 and a gear row 404. A rotating shaft 401 rotates in the impregnation box 2, and an impeller 402 is welded on the rotating shaft 401 in a linear array. The impeller 402 is located above the mixing plate 302.

[0061] Among them, a gear 403 is welded on the rotating shaft 401; a tooth row 404 is welded on the top surface of the mixing plate 302, and the tooth row 404 is meshed with the gear 403. When the mixing plate 302 reciprocates up and down to achieve mixing, the reciprocating rotation of the rotating shaft 401 and the impeller 402 can be achieved through the meshing transmission of the tooth row 404 and the gear 403, and the wood chips can be mixed again when the impeller 402 reciprocates.

[0062] Among them, a fixed block 204 is fixed to the left and right end faces of the impregnation box 2, and the two fixed blocks 204 are both rectangular block structures. Two first electric cylinders 205 are fixed to the top surface of each fixed block 204, and the protruding ends of the four first electric cylinders 205 are fixed to the bottom end surface of the cover plate 201. When the cover plate 201 is opened, the four first electric cylinders 205 can be controlled to extend. When the four first electric cylinders 205 are extended, the cover plate 201 can be lifted up.

[0063] Among them, a sealing assembly 5 is installed on the cover plate 201, and the sealing assembly 5 is composed of a third electric cylinder 501, a seat body 502 and a sealing ball 503. Four third electric cylinders 501 are fixed to the bottom end surface of the cover plate 201. The lower ends of the two third electric cylinders 501 on the left are welded to one seat body 502, and the lower ends of the two third electric cylinders 501 on the right are welded to another seat body 502.

[0064] Among them, a sealing ball 503 is welded on each seat body 502, and the two sealing balls 503 are respectively located directly below the exhaust pipe 202 and the funnel 203. During use, the four third electric cylinders 501 are controlled to contract. Driven by the four third electric cylinders 501, the exhaust pipe 202 and the bottom of the funnel 203 can be sealed through the two sealing balls 503. By sealing the bottom of the exhaust pipe 202 and the funnel 203, it can be ensured that there is no leakage in the subsequent negative pressure and positive pressure conditions.

[0065] Among them, a discharge assembly 6 is installed on the impregnation box 2, and the discharge assembly 6 is composed of a sleeve 601, a discharge pipe 602, a valve 603, a discharge hole 604, a sealing gasket 605, a connecting block 606 and a fourth electric cylinder 607. A sleeve 601 is welded on the impregnation box 2, and a discharge pipe 602 slides in the sleeve 601. The outer wall of the discharge pipe 602 is provided with discharge holes 604 in a circular array, and the outer wall of the discharge pipe 602 is in contact with the inner wall of the sleeve 601.

[0066] Among them, a valve 603 is fixed on the discharge pipe 602, a circular plate is welded on the rear side of the discharge pipe 602, and the rear side of the discharge pipe 602 is sealed after the circular plate is welded. A sealing gasket 605 with an annular structure is sleeved on the discharge pipe 602, and a connecting block 606 is welded on the discharge pipe 602. The connecting block 606 is a rectangular block structure, and two fourth electric cylinders 607 are fixed on the rear end face of the connecting block 606. One end of the rear side of the two fourth electric cylinders 607 is fixed on the front end face of the impregnation box 2. When the two fourth electric cylinders 607 are extended, When expanded, the sealing gasket 605 is in elastic contact with the rear end surface of the sleeve 601. During use, the sealing of the discharge pipe 602 can be achieved through the valve 603, and when the two fourth electric cylinders 607 are controlled to extend, the discharge hole 604 is hidden in the sleeve 601, and the sealing gasket 605 is in elastic contact with the rear end surface of the sleeve 601 to complete the re-sealing. When the liquid in the wood fiber is discharged, the two fourth electric cylinders 607 are controlled to contract, and the two fourth electric cylinders 607 drive the discharge pipe 602 to move backward, and the liquid in the wood fiber can be discharged through the discharge hole 604.

[0067] A production process of a wood chip pretreatment device based on composite cellulase comprises the following steps:

[0068] 01. The wood chips are crushed by a crushing device and then placed into the impregnation box 2;

[0069] 02. Add 5-30U / g enzyme into the impregnation box 2 through the funnel 203, heat the impregnation box 2 through an external heating device, control the temperature at 60-90 degrees, the liquid ratio is 1:3.5-4.5, and keep warm for 30-90 minutes;

[0070] 03. Control the four third electric cylinders 501 to extend;

[0071] 04. The vacuum pump 7 is controlled to work, and the vacuum pump 7 is used to extract air. At this time, the impregnation box 2 is in a negative pressure state, and the liquid containing the enzyme gradually enters the interior of the wood fiber under the influence of the negative pressure;

[0072] 05. Control the four second electric cylinders 301 to reciprocate and extend, and the four second electric cylinders 301 drive the mixing plate 302 to move up and down. When the mixing plate 302 moves up and down, the enzyme and the liquid in the impregnation box 2 can be fully mixed, ensuring the contact effect between the enzyme and the wood fiber, and improving the impregnation effect of the wood fiber;

[0073] 06. Control the vacuum pump 7 to rotate in the opposite direction to achieve pressurization. After the pressurization is completed, control the four third electric cylinders 501 to contract. Driven by the four third electric cylinders 501, the sealing of the funnel and 203 of the vacuum pipe 202 can be completed through the two sealing balls 503. After pressurization for 30 minutes, release the pressure;

[0074] 07. After the pressure relief is completed, the impregnated wood fiber can be taken out;

[0075] 08. After completion, the sawdust is scooped out and placed into the storage box 8 for bleaching.

[0076] Embodiment 2:

[0077] On the basis of the first embodiment, it also includes: a vacuum pump 7 is installed on the top surface of the cover plate 201; a holding box 8 is fixed on the right side of the top surface of the base 1, and a heating tube is installed in the holding box 8. During use, the vacuum pump 7 can realize vacuuming and pressurization inside the impregnation box 2; 5-30U / g enzyme is added to the holding box 8, the heating tube in the holding box 8 is started, the temperature is controlled at 60-90 degrees, the liquid ratio is 1:3.5-4.5, and the temperature is kept warm for 30-90 minutes.

[0078] The specific usage and function of this embodiment are as follows:

[0079] 01. The wood chips are crushed by a crushing device and then placed in the storage box 8; 5-30U / g enzyme is added to the impregnation box 2 through the funnel 203, and the impregnation box 2 is heated by an external heating device to control the temperature at 60-90 degrees, the liquid ratio is 1:3.5-4.5, and the temperature is kept for 30-90 minutes; the four third electric cylinders 501 are controlled to extend; the vacuum pump 7 is controlled to work, and the vacuum pump 7 is exhausted. At this time, the impregnation box 2 is in a negative pressure state, and the liquid containing the enzyme gradually enters the interior of the wood fiber under the influence of the negative pressure; the four second electric cylinders 301 are controlled to reciprocate and extend, and the four second electric cylinders 301 drive The mixing plate 302 moves up and down. When the mixing plate 302 moves up and down reciprocatingly, the enzyme and the liquid in the impregnation box 2 can be fully mixed, thereby ensuring the contact effect between the enzyme and the wood fiber and improving the impregnation effect of the wood fiber. The vacuum pump 7 is controlled to rotate in the opposite direction to realize pressurization. After the pressurization is completed, the four third electric cylinders 501 are controlled to contract. Driven by the four third electric cylinders 501, the sealing of the vacuum pipe 202 funnel and 203 can be completed through two sealing balls 503. The pressure is released after 30 minutes of pressurization. After the pressure release is completed, the impregnated wood fiber can be taken out. After completion, the wood chips are fished out and put into the inside of the storage box 8 for bleaching.

[0080] The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A wood chip pretreatment device based on composite cellulase, characterized in that: include: A base (1); a dipping box (2) is fixed on the left side of the top surface of the base (1); a cover plate (201) is fixed on the dipping box (2); an exhaust pipe (202) and a funnel (203) are welded to the cover plate (201); a first mixing assembly (3) is installed in the dipping box (2), and the first mixing assembly (3), a second electric cylinder (301), a mixing plate (302) and a through hole (303) are formed; four second electric cylinders (301) are fixed on the bottom end surface of the inner wall of the dipping box (2); the upper ends of the four second electric cylinders (301) are welded to the mixing plate (302); the mixing plate (302) is a rectangular plate-shaped structure; the outer side of the mixing plate (302) contacts the inner wall of the dipping box (2); the top surface of the mixing plate (302) is provided with through holes (303) in a linear array; the through holes (303) are a rectangular hole-shaped structure.

2. A wood chip pretreatment device based on composite cellulase as claimed in claim 1, characterized in that: A second mixing assembly (4) is installed in the impregnation box (2), and the second mixing assembly (4) is composed of a rotating shaft (401), an impeller (402), a gear (403) and a gear row (404). A rotating shaft (401) rotates in the impregnation box (2), and impellers (402) are welded to the rotating shaft (401) in a linear array. The impellers (402) are located above the mixing plate (302).

3. A wood chip pretreatment device based on composite cellulase as claimed in claim 2, characterized in that: A gear (403) is welded on the rotating shaft (401); a tooth row (404) is welded on the top surface of the mixing plate (302), and the tooth row (404) is meshed with the gear (403).

4. A wood chip pretreatment device based on composite cellulase as claimed in claim 3, characterized in that: A fixed block (204) is fixed to the left and right end surfaces of the impregnation box (2), and both fixed blocks (204) are rectangular block structures. Two first electric cylinders (205) are fixed to the top surface of each fixed block (204), and the extended ends of the four first electric cylinders (205) are fixed to the bottom end surface of the cover plate (201).

5. A wood chip pretreatment device based on composite cellulase as claimed in claim 4, characterized in that: The cover plate (201) is provided with a sealing assembly (5), the sealing assembly (5) being composed of a third electric cylinder (501), a seat body (502) and a sealing ball (503); four third electric cylinders (501) are fixed to the bottom end surface of the cover plate (201); the lower ends of the two third electric cylinders (501) on the left are welded to one seat body (502), and the lower ends of the two third electric cylinders (501) on the right are welded to another seat body (502).

6. A wood chip pretreatment device based on composite cellulase as claimed in claim 5, characterized in that: A sealing ball (503) is welded on each of the seat bodies (502), and the two sealing balls (503) are respectively located directly below the air extraction pipe (202) and the funnel (203).

7. A wood chip pretreatment device based on composite cellulase according to claim 6, characterized in that: The impregnation box (2) is provided with a discharge assembly (6), which is composed of a sleeve (601), a discharge pipe (602), a valve (603), a discharge hole (604), a sealing gasket (605), a connecting block (606) and a fourth electric cylinder (607). A sleeve (601) is welded to the impregnation box (2), a discharge pipe (602) slides inside the sleeve (601), and the discharge holes (604) are formed in a circular array on the outer wall of the discharge pipe (602), and the outer wall of the discharge pipe (602) contacts the inner wall of the sleeve (601).

8. A wood chip pretreatment device based on composite cellulase according to claim 7, characterized in that: A valve (603) is fixed on the discharge pipe (602), a circular plate is welded on the rear side of the discharge pipe (602), and after the circular plate is welded, the rear side of the discharge pipe (602) is in a sealed state, a sealing gasket (605) with an annular structure is sleeved on the discharge pipe (602), and a connecting block (606) is welded on the discharge pipe (602), the connecting block (606) is a rectangular block structure, and two fourth electric cylinders (607) are fixed on the rear end face of the connecting block (606), and one end of the rear side of the two fourth electric cylinders (607) is fixed to the front end face of the impregnation box (2), and when the two fourth electric cylinders (607) are extended, the sealing gasket (605) elastically contacts the rear end face of the sleeve (601).

9. A wood chip pretreatment device based on composite cellulase according to claim 8, characterized in that: An air pump (7) is installed on the top surface of the cover plate (201); a storage box (8) is fixed on the right side of the top surface of the base (1), and the storage box (8) is connected to the impregnation box (2) through a pipeline.

10. A production process of a wood chip pretreatment device based on composite cellulase according to claims 1-9, characterized in that: The following steps are involved:

01. The wood chips are crushed by a crushing device and then placed into the impregnation box (2); 02. Add 5-30 U / g enzyme into the impregnation box (2) through the funnel (203), heat the impregnation box (2) through an external heating device, control the temperature at 60-90 degrees, the liquid ratio is 1:3.5-4.5, and keep warm for 30-90 minutes; 03. Control the four third electric cylinders (501) to extend; 04. Control the vacuum pump (7) to work, and the vacuum pump (7) draws air, at which time the impregnation box (2) is in a negative pressure state, and under the influence of the negative pressure, the liquid containing the enzyme gradually enters the interior of the wood fiber; 05. Control the four second electric cylinders (301) to reciprocate and extend, and the four second electric cylinders (301) drive the mixing plate 9302 to move up and down. When the mixing plate (302) moves up and down, the enzyme and the liquid in the impregnation box (2) can be fully mixed, thereby ensuring the contact effect between the enzyme and the wood fiber and improving the impregnation effect of the wood fiber; 06. Control the vacuum pump (7) to rotate in the opposite direction to achieve pressurization. After the pressurization is completed, control the four third electric cylinders (501) to contract. Driven by the four third electric cylinders (501), the sealing of the funnel and (203) of the vacuum pipe (202) can be completed through two sealing balls (503). After pressurization for 30 minutes, the pressure is released; 07. After the pressure relief is completed, the impregnated wood fiber can be taken out; 08. After completion, the sawdust is scooped out and placed into the storage box (8) for bleaching.

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