Pulp fiber grinding device

Abstract

The invention provides a paper pulp fiber grinding device, and relates to the field of paper pulp brooming devices, the paper pulp fiber grinding device comprises a base plate, a first pretreatment mechanism and a second pretreatment mechanism are mounted on the left side of the upper end face of the base plate, the first pretreatment mechanism is located above the second pretreatment mechanism, and a third pretreatment mechanism and a fine treatment mechanism are mounted on the right side of the upper end face of the base plate; and the third pretreatment mechanism is positioned above the fine treatment mechanism. Through the arrangement of the third pretreatment mechanism, under the action of ultrasonic vibration, a compact structure of a fiber bundle can be effectively dispersed, pre-dispersion of a fiber mass is realized, and the process is beneficial to ensuring that fibers are uniformly and fully treated, so that the performance of final finished paper is improved; the problems that an existing paper pulp grinding treatment device is single in functional structure, even and sufficient treatment of fibers is difficult to guarantee only through friction force of a grinding disc due to lack of a fiber pre-dispersing function, and improvement of the final finished paper performance is restricted are solved.

Description

Technical Field

[0001] This invention relates to the field of pulp refining apparatus, and more particularly to a pulp fiber refining apparatus. Background Technology

[0002] Kraft paper, due to its high strength, good burst strength, and tear resistance, is widely used in packaging, printing, and building materials. With the upgrading of market demands, some applications, such as absorbent liner paper in food packaging and moisture-proof cushioning paper in building materials, are placing higher requirements on the absorbency of kraft paper. The absorbency of finished paper mainly depends on the specific surface area and capillary action of the pulp fibers. Existing technologies for improving the absorbency of kraft paper mainly include chemical treatment and mechanical treatment. Mechanical treatment primarily involves grinding and buffing the fibers using a pulp grinding device to increase the specific surface area of ​​the fibers.

[0003] However, the existing pulp grinding and processing equipment has a relatively simple functional structure, usually relying only on a pair of grinding discs to grind and initially fluff the pulp fibers. This single mechanical action is difficult to achieve deep fluffing of the fibers, let alone promote the microfibrillation of the fibers, resulting in a limited increase in the specific surface area of ​​the processed fibers. In addition, since the existing pulp grinding and processing equipment also lacks the function of pre-dispersing fiber clumps, the friction force of the grinding discs alone is not enough to ensure that the fibers are treated evenly and fully, which restricts the improvement of the final paper performance. Summary of the Invention

[0004] This invention relates to a pulp fiber refining apparatus, which solves the problem that existing pulp refining devices have a single functional structure and rely solely on a pair of grinding discs to grind and furrow the fibers. This single mechanical action makes it difficult to achieve deep furrowing and microfibrillation of the fibers, resulting in a limited increase in the specific surface area of ​​the fibers after processing. Furthermore, due to the lack of fiber pre-dispersion function, it is difficult to ensure uniform and sufficient fiber processing by relying solely on the friction force of the grinding discs, thus restricting the improvement of the final paper performance.

[0005] In a first aspect, the present invention provides a pulp fiber refining apparatus, specifically comprising: a substrate; a first pretreatment mechanism and a second pretreatment mechanism are mounted on the left side of the upper end face of the substrate, with the first pretreatment mechanism located above the second pretreatment mechanism; a third pretreatment mechanism and a refining mechanism are mounted on the right side of the upper end face of the substrate, with the third pretreatment mechanism located above the refining mechanism; a grinding gap adjustment mechanism is provided on the upper part of the refining mechanism; a flow interception component is mounted on the bottom of the refining mechanism; the third pretreatment mechanism includes a housing, which is mounted on the right side of the upper end face of the substrate, and a vibration treatment tank is mounted on the upper side inside the housing; ultrasonic transducers are uniformly arranged on the lower side inside the housing at the bottom of the vibration treatment tank, and an ultrasonic generator electrically connected to the ultrasonic transducers is mounted on the bottom of the housing; an outlet is provided on the lower front side of the vibration treatment tank, penetrating the front side wall of the housing; a top cover is mounted on the top of the housing, and a feed inlet is opened on the upper end face of the top cover; and a control box is mounted on the front side of the upper end face of the substrate.

[0006] Furthermore, the first pretreatment mechanism includes a pretreatment tank, which is installed on the left side of the upper end face of the substrate. A stirring motor is installed on the top of the pretreatment tank, and the rotating shaft of the stirring motor passes through the top of the pretreatment tank. A stirring shaft is fixedly connected to the lower end of the rotating shaft of the stirring motor. The stirring shaft is located inside the pretreatment tank, and stirring blades are installed on the stirring shaft. An electric valve is installed on the slurry outlet at the lower end of the pretreatment tank.

[0007] Furthermore, the second pretreatment mechanism includes a primary grinding housing, a drive shaft, and a primary grinding motor. The primary grinding housing is installed on the left side of the upper end face of the substrate, and the slurry inlet at the upper end of the primary grinding housing is fixedly connected to the slurry outlet at the lower end of the pretreatment tank. A grinding shaft is rotatably connected to each of the left and right end faces of the primary grinding housing, and the two grinding shafts pass through the left and right side walls of the primary grinding housing respectively. A primary grinding disc is installed at the opposite end of each of the two grinding shafts, and a driven pulley is installed at the opposite end of each of the two grinding shafts. There are two drive shafts, and the two drive shafts are symmetrically connected to the front side of the primary grinding housing. A first bevel gear is installed at the opposite end of each of the two drive shafts, and a drive pulley is installed at the opposite end of each of the two drive shafts. The drive pulleys are connected to the driven pulleys via belts. The primary grinding motor is installed on the upper front side of the primary grinding housing, and a second bevel gear is installed on the shaft of the primary grinding motor, and the second bevel gear meshes with two first bevel gears.

[0008] Furthermore, the refining mechanism includes a refining tank and a reducer. The refining tank is installed on the right side of the upper end face of the substrate, and a fixed refining grinding disc is installed on the bottom end face inside the refining tank. The input shaft of the reducer is fixedly connected to the rotating shaft of the refining grinding motor, and the refining grinding motor is installed on the upper part of the reducer. The output shaft of the reducer passes through the top of the refining tank, and a moving refining grinding disc is fixedly connected to the lower end of the output shaft of the reducer. The moving refining grinding disc is located inside the refining tank and is located above the fixed refining grinding disc. The pulp inlet on the front side of the top of the refining tank is connected to the pulp outlet of the second pulp conveying pump through a pipe.

[0009] Furthermore, discharge holes are provided in the middle of the bottom end face of the fine treatment tank and the middle of the bottom end face of the fine treatment grinding disc.

[0010] Furthermore, the grinding gap adjustment mechanism includes a lifting plate and a U-shaped mounting frame. Each of the four corners of the lifting plate is slidably connected to a vertical guide rod fixed to the top of the finishing tank, and the lifting plate is fixedly connected to the reducer. The U-shaped mounting frame is installed on the top of the finishing tank, and an electric cylinder A is installed on the upper part of the U-shaped mounting frame. The telescopic rod of the electric cylinder A is fixedly connected to the upper surface of the lifting plate.

[0011] Furthermore, the interception assembly includes a sealing barrel, which is fixedly connected to the bottom of the fine treatment tank. An electric cylinder B is installed on the middle side of the bottom of the sealing barrel. The telescopic rod of the electric cylinder B passes through the bottom of the sealing barrel, and a sealing plate is fixedly connected to the upper end of the telescopic rod of the electric cylinder B. A blocking post is provided in the middle of the upper surface of the sealing plate, and a sealing ring is provided at the edge of the upper surface of the sealing plate. A discharge port is provided on the front side of the bottom of the sealing barrel.

[0012] Furthermore, the plugging post and the discharge hole are on the same axis, and the diameter of the plugging post is equal to the diameter of the discharge hole, and the outer side of the upper end of the plugging post is a conical surface.

[0013] Furthermore, when the flow-blocking component is in the flow-blocking state, the blocking post is inserted into the discharge hole, and the upper end face of the sealing ring is in close contact with the bottom end face of the fine treatment tank.

[0014] Furthermore, the pulp outlet at the lower end of the primary grinding housing is connected to the suction port of the first pulp conveying pump via a pipe, and the pulp outlet of the first pulp conveying pump is connected to the feed port on the top cover via a pipe. The first pulp conveying pump is installed in the middle of the upper surface of the substrate; the discharge port is connected to the suction port of the second pulp conveying pump via a pipe, and the second pulp conveying pump is installed on the right side of the upper surface of the substrate.

[0015] This invention provides a pulp fiber refining apparatus, which has the following beneficial effects: This invention performs preliminary frictional flocculing treatment on the pulp through a second pretreatment mechanism. On this basis, a fine treatment mechanism further performs deep flocculing treatment on the pulp to further enhance the degree of fiber flocculing and promote the microfibrillation of fibers. This greatly increases the specific surface area and capillary efficiency of the fibers, and significantly improves the water absorption and performance stability of the subsequent paper.

[0016] The present invention, through the setting of a third pretreatment mechanism, can use an ultrasonic generator to convert electrical energy into high-frequency alternating current, and then use an ultrasonic transducer to convert the high-frequency electrical signal into high-frequency mechanical vibration, which is transmitted to the bottom of the vibration treatment tank. Under the action of ultrasonic vibration, the compact structure of the fiber bundle can be effectively dispersed, realizing the pre-dispersion of fiber clusters. This process helps to ensure that the fibers are treated evenly and fully, thereby improving the performance of the final paper.

[0017] By setting up a flow interception component, the present invention ensures that when the pulp is processed by the finishing mechanism, the blocking insert will be embedded in the discharge hole to form a blockage, thereby preventing pulp that has not undergone deep fission treatment from entering the discharge hole. This design allows pulp that has not reached the deep fission standard to remain on the upper part of the finishing grinding disc, ensuring that the pulp receives sufficient and effective deep fission treatment, and further improving the fission treatment effect of pulp fibers.

[0018] This invention, through the setting of a grinding gap adjustment mechanism, can flexibly and accurately adjust the distance between the moving grinding disc and the stationary grinding disc in the finishing process. This design can adjust the grinding gap size in real time according to different pulp characteristics, fiber types and processing requirements, thereby significantly improving the equipment's adaptability to different types of pulp and its processing accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the accompanying drawings of the present invention will be briefly described below.

[0020] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of this application is shown; Figure 2 A structural schematic diagram of this application from a rear view is shown; Figure 3 This diagram illustrates the structure of this application in its disassembled state. Figure 4 A partial cross-sectional structural schematic diagram of the pretreatment tank of this application is shown; Figure 5 This paper shows a partial cross-sectional structural schematic diagram of the primary grinding housing of this application; Figure 6 A schematic diagram of the grinding shaft, primary grinding disc, drive shaft, and primary grinding motor of this application is shown. Figure 7A schematic diagram of the grinding shaft and primary grinding disc of this application is shown; Figure 8 The diagram shows a partial cross-sectional view of the housing, vibration treatment tank, outlet, and top cover of this application. Figure 9 A partial cross-sectional structural schematic diagram of the fine treatment tank, fine treatment moving grinding disc, fine treatment stationary grinding disc, sealing barrel and discharge port of this application is shown. Figure 10 A schematic diagram of the reducer, the fine-processing moving grinding disc, and the fine-processing grinding motor of this application is shown; Figure 11 A partial cross-sectional structural schematic diagram of the finishing tank and finishing grinding disc of this application is shown.

[0021] List of reference numerals 1. Substrate; 2. First pretreatment unit; 201. Pretreatment tank; 202. Stirring motor; 203. Stirring shaft; 204. Electric valve; 3. Second pretreatment mechanism; 301. Primary grinding housing; 302. Grinding shaft; 303. Primary grinding disc; 304. Drive shaft; 305. Primary grinding motor; 4. Third pretreatment mechanism; 401. Housing; 402. Vibration treatment tank; 403. Discharge port; 404. Top cover; 405. Ultrasonic generator; 406. Ultrasonic transducer; 5. Fine treatment mechanism; 501. Fine treatment tank; 502. Reducer; 503. Fine treatment moving grinding disc; 504. Fine treatment stationary grinding disc; 505. Fine treatment grinding motor; 506. Discharge hole; 6. Grinding gap adjustment mechanism; 601. Lifting plate; 602. Vertical guide rod; 603. Electric cylinder A; 604. U-shaped mounting bracket; 7. Flow interception assembly; 701. Sealing barrel; 702. Electric cylinder B; 703. Sealing plate; 704. Blocking post; 705. Sealing ring; 706. Discharge port; 8. First pulp conveying pump; 9. Second pulp conveying pump; 10. Control box. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1 to 11 : This invention proposes a pulp fiber refining apparatus, comprising: a substrate 1; a first pretreatment mechanism 2 and a second pretreatment mechanism 3 are mounted on the left side of the upper end face of the substrate 1, with the first pretreatment mechanism 2 located above the second pretreatment mechanism 3; a third pretreatment mechanism 4 and a refining mechanism 5 are mounted on the right side of the upper end face of the substrate 1, with the third pretreatment mechanism 4 located above the refining mechanism 5; a grinding gap adjustment mechanism 6 is provided on the upper part of the refining mechanism 5; a flow interception component 7 is mounted on the bottom of the refining mechanism 5; the third pretreatment mechanism 4 includes a housing 401, and the housing 401 is equipped with... On the right side of the upper end face of the substrate 1, and on the upper side of the inside of the housing 401, a vibration treatment groove 402 is installed. On the lower side of the inside of the housing 401, at the bottom of the vibration treatment groove 402, ultrasonic transducers 406 are uniformly arranged. An ultrasonic generator 405 electrically connected to the ultrasonic transducers 406 is installed at the bottom of the housing 401. An outlet 403 penetrating the front side wall of the housing 401 is provided at the lower front side of the vibration treatment groove 402. A top cover 404 is installed on the top of the housing 401, and a feed inlet is opened on the upper end face of the top cover 404. A control box 10 is installed on the front side of the upper end face of the substrate 1.

[0024] The first pretreatment mechanism 2 includes a pretreatment tank 201, which is installed on the left side of the upper surface of the substrate 1. A stirring motor 202 is installed on the top of the pretreatment tank 201. The rotating shaft of the stirring motor 202 passes through the top of the pretreatment tank 201, and a stirring shaft 203 is fixedly connected to the lower end of the rotating shaft of the stirring motor 202. The stirring shaft 203 is located inside the pretreatment tank 201, and a stirring blade is installed on the stirring shaft 203. An electric valve 204 is installed on the slurry outlet at the lower end of the pretreatment tank 201.

[0025] The second pretreatment mechanism 3 includes a primary grinding housing 301, a drive shaft 304, and a primary grinding motor 305. The primary grinding housing 301 is installed on the left side of the upper end face of the substrate 1, and the slurry inlet at the upper end of the primary grinding housing 301 is fixedly connected to the slurry outlet at the lower end of the pretreatment tank 201. A grinding shaft 302 is rotatably connected to both the left and right end faces of the primary grinding housing 301, and the two grinding shafts 302 pass through the left and right side walls of the primary grinding housing 301 respectively. A primary grinding disc 303 is installed at the opposite end of each of the two grinding shafts 302, and a driven pulley is installed at the opposite end of each of the two grinding shafts 302. There are two drive shafts 304, and the two drive shafts 304 are rotatably connected to the primary grinding housing in a left-right symmetrical manner. On the front side of the housing 301, a first bevel gear is installed at the opposite ends of the two drive shafts 304, and a drive pulley is installed at the opposite ends of the two drive shafts 304. The drive pulleys are connected to the driven pulleys via belts. The primary grinding motor 305 is installed on the upper front side of the primary grinding housing 301, and a second bevel gear is installed on the shaft of the primary grinding motor 305. The second bevel gear meshes with the two first bevel gears. The pulp is subjected to preliminary frictional fibrillation treatment by the second pretreatment mechanism 3, and then the pulp is subjected to deep fibrillation treatment by the fine treatment mechanism 5, which further enhances the degree of fiber fibrillation, promotes the microfibrillation of fibers, greatly increases the specific surface area and capillary efficiency of fibers, and improves the water absorption performance of subsequent papermaking.

[0026] The finishing mechanism 5 includes a finishing tank 501 and a reducer 502. The finishing tank 501 is installed on the right side of the upper end face of the substrate 1, and a finishing stationary grinding disc 504 is installed on the bottom end face of the finishing tank 501. The input shaft of the reducer 502 is fixedly connected to the rotating shaft of the finishing grinding motor 505, and the finishing grinding motor 505 is installed on the upper part of the reducer 502. The output shaft of the reducer 502 passes through the top of the finishing tank 501, and a finishing moving grinding disc 503 is fixedly connected to the lower end of the output shaft of the reducer 502. The finishing moving grinding disc 503 is located inside the finishing tank 501 and is located above the finishing stationary grinding disc 504. The pulp inlet on the front side of the top of the finishing tank 501 is connected to the pulp outlet of the second pulp conveying pump 9 through a pipe. The finishing mechanism 5 is used to perform deep fibrillation treatment on the pulp, enhance the degree of fiber fibrillation, and promote the microfibrillation of the fibers.

[0027] Both the bottom end face of the fine treatment tank 501 and the bottom end face of the fine treatment grinding disc 504 are provided with discharge holes 506 for discharging the treated slurry.

[0028] The grinding gap adjustment mechanism 6 includes a lifting plate 601 and a U-shaped mounting bracket 604. A vertical guide rod 602, fixed to the top of the finishing tank 501, is slidably connected to each of the four corners of the lifting plate 601. The lifting plate 601 is also fixedly connected to the reducer 502. The U-shaped mounting bracket 604 is mounted on the top of the finishing tank 501, and an electric cylinder A603 is mounted on the upper part of the U-shaped mounting bracket 604. The telescopic rod of the electric cylinder A603 is fixedly connected to the upper end face of the lifting plate 601. The grinding gap adjustment mechanism 6 allows for flexible and precise adjustment of the distance between the polishing moving grinding disc 503 and the polishing stationary grinding disc 504. During adjustment, the lifting plate 601, reducer 502, and polishing moving grinding disc 503 can be moved up and down by controlling the telescopic rod of the electric cylinder A603, thereby adjusting the distance between the polishing moving grinding disc 503 and the polishing stationary grinding disc 504. This improves the equipment's adaptability to different types of pulp and its processing accuracy.

[0029] The lower end of the primary grinding housing 301 is connected to the suction port of the first pulp conveying pump 8 through a pipe, and the discharge port of the first pulp conveying pump 8 is connected to the feed port on the top cover 404 through a pipe. The first pulp conveying pump 8 is installed in the middle of the upper end face of the substrate 1. The discharge port 403 is connected to the suction port of the second pulp conveying pump 9 through a pipe, and the second pulp conveying pump 9 is installed on the right side of the upper end face of the substrate 1.

[0030] Example 2, based on Example 1, such as Figure 9 and Figure 11 As shown, the interception assembly 7 includes a sealing barrel 701, which is fixedly connected to the bottom of the fine treatment tank 501. An electric cylinder B702 is installed on the middle side of the bottom of the sealing barrel 701. The telescopic rod of the electric cylinder B702 passes through the bottom of the sealing barrel 701, and a sealing plate 703 is fixedly connected to the upper end of the telescopic rod of the electric cylinder B702. A blocking post 704 is provided in the middle of the upper end face of the sealing plate 703, and a sealing ring 705 is provided at the edge of the upper end face of the sealing plate 703. A discharge port 706 is provided on the front side of the bottom of the sealing barrel 701. The blocking post 704 and the discharge port 506 are located at... On the same axis, the diameter of the plugging post 704 is equal to the diameter of the discharge hole 506, and the outer side of the upper end of the plugging post 704 is tapered, making it easier for the plugging post 704 to be inserted into the discharge hole 506. By embedding the plugging post 704 into the discharge hole 506 to form a blockage, the pulp that has not been deeply brushed is prevented from entering the discharge hole 506, so that the pulp that has not reached the deep brushing standard continues to remain on the upper part of the finishing grinding disc 504, ensuring that the pulp receives sufficient and effective deep brushing treatment, and further improving the brushing treatment effect of the pulp fiber.

[0031] When the flow-blocking component 7 is in the flow-blocking state, the blocking post 704 is inserted into the discharge hole 506, and the upper end face of the sealing ring 705 is in close contact with the bottom end face of the fine treatment tank 501, so that the discharge hole 506 is effectively blocked. Electric cylinder B702, electric cylinder A603, fine grinding motor 505, ultrasonic generator 405, primary grinding motor 305, electric valve 204, and stirring motor 202 are all electrically connected to control box 10.

[0032] The working principle of this invention is as follows: First, the kraft pulp to be treated is added into the pretreatment tank 201 through the upper feeding port. Then, the stirring motor 202 is started, rotating the stirring shaft 203. The rotating stirring shaft 203, along with the stirring blades, stirs the pulp inside the pretreatment tank 201, preventing fiber agglomeration. Next, the primary grinding motor 305 is started, rotating the second bevel gear, two first bevel gears, two drive shafts 304, two drive pulleys, two driven pulleys, two grinding shafts 302, and two primary grinding discs 303, with the two primary grinding discs rotating in opposite directions. Then, the electric valve 204 is opened, allowing the stirred pulp to enter the primary grinding housing 301. The pulp undergoes preliminary frictional ablation treatment by the two primary grinding discs 303 rotating in opposite directions. The pulp is then transported to the vibratory treatment tank 402 by the first pulp conveying pump 8. The ultrasonic generator 405 is then activated, converting electrical energy into high-frequency alternating current (20-40kHz) through an oscillation circuit. The ultrasonic transducer 406 converts the high-frequency electrical signal into high-frequency mechanical vibration, which is then transmitted to the bottom of the vibratory treatment tank 402. The ultrasonic vibration disperses the tight structure of the fiber bundles in the pulp inside the vibratory treatment tank 402, thereby achieving the pre-dispersion function of fiber clusters, ensuring that the fibers are treated uniformly and fully, and improving the final paper performance.

[0033] Then, the second pulp conveying pump 9 is started, conveying the pulp after ultrasonic vibration treatment inside the vibration treatment tank 402 to the fine treatment tank 501. At this time, the pulp is located between the fine treatment moving grinding disc 503 and the fine treatment stationary grinding disc 504, and the pulp will stay on the upper part of the fine treatment stationary grinding disc 504. Then, the fine treatment grinding motor 505 is started, and the fine treatment moving grinding disc 503 is rotated through the shaft of the fine treatment grinding motor 505. In conjunction with the fine treatment stationary grinding disc 504, the pulp is deeply flocculed, which promotes the microfibrillation of fibers, greatly increases the specific surface area and capillary effect of fibers, and fundamentally improves the water absorption performance of paper. At this time, the height of the upper end of the blocking column 704 is higher than the height of the upper end of the fine treatment stationary grinding disc 504, so that the pulp that has not been deeply flocculed cannot enter the discharge hole 506, further improving the flocculing effect of pulp fibers. Next, the telescopic rod of the electric cylinder B702 is retracted, moving the sealing plate 703, the plugging post 704, and the sealing ring 705 downwards, causing the upper end face of the sealing ring 705 to separate from the bottom end face of the finishing tank 501, and the plugging post 704 to be pulled out from the discharge hole 506. At this time, the pulp that has undergone deep buffing treatment enters the sealed tank 701 through the discharge hole 506. Finally, the treated pulp is discharged from the discharge port 706 to the subsequent papermaking process.

[0034] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0035] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0036] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pulp fiber refining apparatus, comprising: A substrate (1) is characterized in that a first pretreatment mechanism (2) and a second pretreatment mechanism (3) are installed on the left side of the upper surface of the substrate (1), and the first pretreatment mechanism (2) is located above the second pretreatment mechanism (3). A third pretreatment mechanism (4) and a fine treatment mechanism (5) are installed on the right side of the upper surface of the substrate (1), and the third pretreatment mechanism (4) is located above the fine treatment mechanism (5). A grinding gap adjustment mechanism (6) is provided on the upper part of the fine treatment mechanism (5). A flow interception component (7) is installed at the bottom of the fine treatment mechanism (5). The third pretreatment mechanism (4) includes a housing (401), and the housing (401) is installed on the substrate (1). 1) On the right side of the upper end face, and on the upper side of the inside of the housing (401), a vibration treatment groove (402) is installed. On the lower side of the inside of the housing (401), ultrasonic transducers (406) are uniformly arranged at the bottom of the vibration treatment groove (402). An ultrasonic generator (405) electrically connected to the ultrasonic transducer (406) is installed at the bottom of the housing (401). An outlet (403) penetrating the front side wall of the housing (401) is provided at the lower front side of the vibration treatment groove (402). A top cover (404) is installed on the top of the housing (401), and a feed inlet is opened on the upper end face of the top cover (404). A control box (10) is installed on the front side of the upper end face of the substrate (1).

2. The pulp fiber refining apparatus according to claim 1, characterized in that: The first pretreatment mechanism (2) includes a pretreatment tank (201), which is installed on the left side of the upper end face of the substrate (1). A stirring motor (202) is installed on the top of the pretreatment tank (201). The rotating shaft of the stirring motor (202) passes through the top of the pretreatment tank (201), and a stirring shaft (203) is fixedly connected to the lower end of the rotating shaft of the stirring motor (202). The stirring shaft (203) is located inside the pretreatment tank (201), and a stirring blade is installed on the stirring shaft (203). An electric valve (204) is installed on the slurry outlet at the lower end of the pretreatment tank (201).

3. The pulp fiber refining apparatus according to claim 2, characterized in that: The second pretreatment mechanism (3) includes a primary grinding housing (301), a drive shaft (304), and a primary grinding motor (305). The primary grinding housing (301) is installed on the left side of the upper end face of the substrate (1), and the slurry inlet at the upper end of the primary grinding housing (301) is fixedly connected to the slurry outlet at the lower end of the pretreatment tank (201). A grinding shaft (302) is rotatably connected to both the left and right end faces of the primary grinding housing (301), and the two grinding shafts (302) pass through the left and right side walls of the primary grinding housing (301) respectively. A primary grinding disc (303) is installed at the opposite end of each of the two grinding shafts (302), and the two grinding shafts (302) are connected to each other. Each shaft (302) has a driven pulley installed at its opposite ends. There are two drive shafts (304), which are symmetrically connected to the front of the primary grinding housing (301). Each of the two drive shafts (304) has a first bevel gear installed at its opposite ends, and each of the two drive shafts (304) has a drive pulley installed at its opposite ends. The drive pulley is connected to the driven pulley via a belt. The primary grinding motor (305) is installed on the upper front of the primary grinding housing (301), and a second bevel gear is installed on the shaft of the primary grinding motor (305). The second bevel gear meshes with two first bevel gears.

4. The pulp fiber refining apparatus according to claim 1, characterized in that: The finishing mechanism (5) includes a finishing tank (501) and a reducer (502). The finishing tank (501) is installed on the right side of the upper end face of the substrate (1), and a finishing fixed grinding disc (504) is installed on the bottom end face inside the finishing tank (501). The input shaft of the reducer (502) is fixedly connected to the rotating shaft of the finishing grinding motor (505), and the finishing grinding motor (505) is installed on the upper part of the reducer (502). The output shaft of the reducer (502) passes through the top of the finishing tank (501), and a finishing moving grinding disc (503) is fixedly connected to the lower end of the output shaft of the reducer (502). The finishing moving grinding disc (503) is located inside the finishing tank (501), and the finishing moving grinding disc (503) is located above the finishing fixed grinding disc (504). The pulp inlet on the front side of the top of the finishing tank (501) is connected to the pulp outlet of the second pulp conveying pump (9) through a pipe.

5. A pulp fiber refining apparatus according to claim 4, characterized in that: The fine treatment tank (501) and the fine treatment grinding disc (504) both have discharge holes (506) in the middle of their bottom surfaces.

6. A pulp fiber refining apparatus according to claim 4, characterized in that: The grinding gap adjustment mechanism (6) includes a lifting plate (601) and a U-shaped mounting bracket (604). Each of the four corners of the lifting plate (601) is slidably connected to a vertical guide rod (602) fixed to the top of the fine treatment tank (501). The lifting plate (601) is fixedly connected to the reducer (502). The U-shaped mounting bracket (604) is installed on the top of the fine treatment tank (501). An electric cylinder A (603) is installed on the upper part of the U-shaped mounting bracket (604). The telescopic rod of the electric cylinder A (603) is fixedly connected to the upper end face of the lifting plate (601).

7. A pulp fiber refining apparatus according to claim 5, characterized in that: The interception assembly (7) includes a sealing barrel (701), which is fixedly connected to the bottom of the fine treatment tank (501). An electric cylinder B (702) is installed on the middle side of the bottom of the sealing barrel (701). The telescopic rod of the electric cylinder B (702) passes through the bottom of the sealing barrel (701), and a sealing plate (703) is fixedly connected to the upper end of the telescopic rod of the electric cylinder B (702). A blocking insert (704) is provided in the middle of the upper surface of the sealing plate (703), and a sealing rubber ring (705) is provided at the edge of the upper surface of the sealing plate (703). A discharge port (706) is provided on the front side of the bottom of the sealing barrel (701).

8. A pulp fiber refining apparatus according to claim 7, characterized in that: The plugging post (704) and the discharge hole (506) are on the same axis, and the diameter of the plugging post (704) is equal to the diameter of the discharge hole (506), and the outer side of the upper end of the plugging post (704) is a conical surface.

9. A pulp fiber refining apparatus according to claim 7, characterized in that: When the flow-blocking component (7) is in the flow-blocking state, the plugging post (704) is inserted into the discharge hole (506), and the upper end face of the sealing ring (705) is in close contact with the bottom end face of the fine treatment tank (501).

10. A pulp fiber refining apparatus according to claim 3, characterized in that: The lower end of the primary grinding housing (301) is connected to the suction port of the first pulp conveying pump (8) through a pipe, and the discharge port of the first pulp conveying pump (8) is connected to the feed port on the top cover (404) through a pipe. The first pulp conveying pump (8) is installed in the middle of the upper end face of the substrate (1). The discharge port (403) is connected to the suction port of the second pulp conveying pump (9) through a pipe, and the second pulp conveying pump (9) is installed on the right side of the upper end face of the substrate (1).

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