Waste paper microfibrillated fiber pretreatment device

Abstract

The invention provides a waste paper microfibrillated fiber pretreatment device, and relates to the field of papermaking equipment. Two smashing rollers are symmetrically and rotationally connected to the upper side in the device body, a spiral conveying roller is rotationally connected to the middle in the device body, a driving rod is rotationally connected to the lower end face of the bottom of the device body, and the front end of the driving rod and the front end of the spiral conveying roller are in transmission connection through a synchronous belt. Two suspension mixing rods are symmetrically and rotatably connected to the upper end face of the bottom of the device body, a fine crushing cylinder is fixedly connected to the middle of the bottoms of the left and right side walls of the device body, and a crushing motor is fixedly connected to the bottom of the fine crushing cylinder. In the fiber treatment link, the microfibrillating degree of fibers is greatly improved through cooperation of the guide plates and the crushing blades in the fine crushing cylinder, the quality of fiber suspension liquid is effectively improved, high-quality raw materials are provided for subsequent paper forming, the performance of final paper is improved, and the problems that the fibers are poor and finished products are affected due to poor pretreatment are solved.

Description

Technical Field

[0001] This invention relates to the field of papermaking equipment technology, and in particular to a waste paper microfibrillated fiber pretreatment device. Background Technology

[0002] With the continuous development of the social economy, the market demand for paper is increasing daily, which directly leads to a sharp rise in the consumption of papermaking raw materials such as wood. At the same time, a large amount of waste paper is generated. Recycling waste paper can not only effectively reduce deforestation and alleviate the pressure of raw material shortages, but also reduce environmental pollution caused by waste paper accumulation. It has an undeniable significance in resource protection and ecological maintenance. However, existing technologies have the following shortcomings: Uneven crushing and easy accumulation of materials during waste paper pretreatment lead to low pretreatment efficiency and unstable raw material supply. This also results in uneven mixing and low microfibrillation during fiber processing, causing poor quality of fiber suspension and affecting the forming effect of paper products. Summary of the Invention

[0003] This invention relates to a waste paper microfibrillation fiber pretreatment device. In the fiber treatment stage, the mixing rod in the mixing chamber thoroughly stirs the suspension, ensuring uniform mixing of fibers and water. The drive rod ensures mixing stability, and the suspension conveying pump enables smooth conveying. The cooperation between the guide plate and the pulverizing blades in the fine pulverizing cylinder significantly improves the degree of fiber microfibrillation, effectively improving the quality of the fiber suspension and providing high-quality raw materials for subsequent paper forming, thus contributing to improved final paper performance. Through the coordinated operation of various structures within the main body of the device, continuous processing of waste paper is achieved from input to crushing and conveying. The specially shaped crushing blades on the pulverizing roller improve the uniformity and thoroughness of waste paper crushing. The structural design of the pulverizing chamber and conveying pipe, combined with the function of the spiral conveying roller, avoids material accumulation, significantly improving the efficiency and continuity of waste paper pretreatment and providing a stable supply of raw materials for subsequent processing.

[0004] This invention provides a waste paper microfibrillated fiber pretreatment device, specifically comprising: a device body; two shredding rollers symmetrically and rotatably connected to the upper side of the device body; a spiral conveying roller rotatably connected to the middle of the device body; a drive rod rotatably connected to the lower bottom surface of the device body; the front end of the drive rod and the front end of the spiral conveying roller are connected by a synchronous belt drive; two suspension mixing rods symmetrically and rotatably connected to the upper bottom surface of the device body; and fine shredding cylinders fixedly connected to the middle of the bottom of the left and right side walls of the device body, with a shredding motor fixedly connected to the bottom of the fine shredding cylinders.

[0005] Furthermore, the top of the main body of the device is provided with a feed inlet, and the bottom of the feed inlet is provided with a crushing chamber in the main body of the device. The crushing chamber is symmetrically connected to the spiral conveying rollers. The front end of the spiral conveying roller on the left side of the crushing chamber is fixedly connected to a drive motor. The drive motor is fixedly installed on the front outer wall of the main body of the device. The rear ends of the two spiral conveying rollers are fixedly connected to transmission gears and mesh with each other.

[0006] Furthermore, the outer wall of the crushing roller is provided with crushing blades at equal intervals, and the centrifugal end of the crushing blade is L-shaped and the rotation direction is blade-shaped.

[0007] Furthermore, the bottom of the crushing chamber of the main body of the device is concave and connected to the top of the conveying pipe that is fixedly connected to the bottom of the crushing chamber. The rear end of the conveying pipe is curved downward. A spiral conveying roller is rotatably connected in the conveying pipe. The front end of the spiral conveying roller is connected to the drive motor. The drive motor is fixedly installed in the middle of the front outer wall of the main body of the device.

[0008] Furthermore, a mixing chamber is provided at the bottom of the main body of the device, and two suspension mixing rods are rotatably connected to the bottom of the mixing chamber. Mixing fan blades are connected at equal intervals on the rod body of the suspension mixing rods, and a bevel gear is fixedly connected to the bottom end of the suspension mixing rod.

[0009] Furthermore, a drive rod is rotatably connected to the bottom of the mixing chamber of the main body of the device. Drive bevel gears are installed at equal intervals on the drive rod. The drive bevel gears and the bevel gears fixedly connected to the bottom of the suspension mixing rod are meshed. A suspension conveying pump is fixedly connected to the middle of the left and right inner walls of the mixing chamber. The suspension conveying pump is connected to the fine pulverizing cylinder at the bottom of the left and right outer walls of the main body of the device through a pipeline.

[0010] Furthermore, pipes are connected to the middle of the upper end face and the rear side of the lower end face of the fine grinding cylinder. Two cylindrical guide plates are provided in the middle of the interior of the fine grinding cylinder. The outer guide plate is sleeved on the outer wall of the inner guide plate. The top of the inner guide plate is fixedly connected to the inner top wall of the fine grinding cylinder, and the bottom of the outer guide plate is fixedly connected to the inner bottom wall of the fine grinding cylinder. The top shaft of the grinding motor is rotatably connected to the inner guide plate of the fine grinding cylinder. Grinding blades are installed at equal intervals on the shaft of the grinding motor. A spray nozzle is connected to the rear end pipe of the fine grinding cylinder.

[0011] Furthermore, a forming bracket is fixedly connected to the rear side of the main body of the device. The top of the forming bracket is inclined and symmetrically connected with two forming conveyor belts. The front ends of the two forming conveyor belts are located on the upper and lower sides of the spray nozzle at the rear end of the fine crushing cylinder. A blowing bracket is fixedly connected to the top of the forming bracket in an inclined manner. A fan is installed at a medium distance on the blowing bracket and faces the lower surface of the forming conveyor belt at the top of the forming bracket.

[0012] Furthermore, four rows of vacuum suction tanks are fixedly connected to the lower side of the blower bracket connected to the rear forming bracket of the main body of the device. The vacuum suction tanks and the fan in the blower bracket are matched. A filter screen is fastened to the top end face of the vacuum suction tank. The filter screen is attached to the forming conveyor belt. The bottom of the vacuum suction tanks is connected to the collection pipe. A centrifugal fan is fixedly connected to the rear end of the collection pipe.

[0013] This invention discloses a process for a waste paper microfibrillated fiber pretreatment device, comprising the following steps: 1) First, waste paper is fed into the feed port at the top of the main body of the device. The drive motor is started and the two crushing rollers are driven to rotate synchronously in opposite directions through the transmission gear. The waste paper is initially conveyed and squeezed. At the same time, the crushing blades on the crushing rollers shred and crush the waste paper. The crushed waste paper fragments are guided into the conveying pipe by the concave structure at the bottom of the crushing chamber. 2) The fiber is conveyed to the mixing chamber by a spiral conveyor roller. The drive motor at the front end of the spiral conveyor roller drives the drive rod to rotate through the synchronous belt. The drive rod drives the suspension mixing rod to rotate through the drive bevel gear, so that the fiber and water are fully mixed in the mixing chamber to form a fiber suspension. 3) The suspension pump delivers the fiber suspension to the fine grinding cylinder, where it comes into full contact with the grinding blades driven by the grinding motor under the guidance of two layers of guide plates. After the microfibrillation treatment is completed, the suspension is sprayed out through the spray nozzle. 4) The sprayed suspension falls between the two forming conveyor belts on the forming support. The fan of the blowing support blows air to accelerate the evaporation of water. At the same time, the centrifugal fan creates negative pressure in the vacuum suction tank through the collection pipe, which, together with the filter screen, quickly absorbs the water, and finally forms a wet paper web, which is then transported by the forming conveyor belt to the subsequent processing stage.

[0014] This invention provides a waste paper microfibrillated fiber pretreatment device, which has the following beneficial effects: 1. Through the coordinated operation of various internal structures of the device, the continuous processing of waste paper from input to crushing and conveying is realized. The specially shaped crushing blades on the crushing roller improve the uniformity and thoroughness of waste paper crushing. The structural design of the crushing chamber and the conveying pipe, combined with the function of the spiral conveying roller, avoids material accumulation, significantly improves the efficiency and continuity of waste paper pretreatment, and provides a stable supply of raw materials for subsequent processing.

[0015] 2. In the fiber processing stage, the thorough stirring of the suspension mixing rod in the mixing chamber ensures uniform mixing of fibers and water, the transmission of the drive rod ensures mixing stability, the suspension conveying pump achieves smooth delivery, and the cooperation between the guide plate and the pulverizing blade in the fine pulverizing cylinder greatly improves the degree of fiber microfibrillation, effectively improving the quality of the fiber suspension, providing high-quality raw materials for subsequent paper forming, and helping to improve the performance of the final paper.

[0016] 3. In the forming stage, the forming support provides stable support, the inclined forming conveyor belt effectively receives the fiber suspension, and the synergistic effect of the blower fan and vacuum filter tank accelerates water evaporation and dehydration. The filter screen prevents fiber loss, which significantly improves the forming speed and quality of the wet paper web, lays a good foundation for subsequent paper processing, and improves the overall papermaking production efficiency and finished product quality. At the same time, it realizes the efficient recycling of waste paper, which has good economic and environmental benefits. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the right front side axial view structure according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the right rear side axial view structure according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the overall disassembled structure of an embodiment of the present invention.

[0022] Figure 4 This is a cross-sectional structural diagram of the main body of the device according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the crushing chamber according to an embodiment of the present invention.

[0024] Figure 6 This is a cross-sectional structural diagram of the fine grinding cylinder according to an embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the spray nozzle and forming conveyor belt structure according to an embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the axial structure of the molding bracket according to an embodiment of the present invention.

[0027] List of reference numerals 1. Main body of the device; 101. Feed inlet; 102. Crushing chamber; 103. Conveying pipe; 104. Mixing bin; 105. Forming support; 106. Blowing support; 107. Vacuum suction filter tank; 10701. Collection pipe; 2. Drive motor; 3. Crushing roller; 301. Crushing blade; 302. Transmission gear; 4. Spiral conveying roller; 5. Drive rod; 501. Drive bevel gear; 6. Synchronous belt; 7. Suspension mixing rod; 8. Suspension conveying pump; 9. Fine crushing cylinder; 901. Guide plate; 10. Crushing motor; 1001. Crushing blade; 11. Centrifugal fan; 12. Forming conveyor belt. Detailed Implementation

[0028] To make the objectives, solutions, and advantages 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. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0029] Example 1: Please refer to Figures 1 to 8 As shown: This invention provides a waste paper microfibrillated fiber pretreatment device and its process, comprising a main body 1. Two shredding rollers 3 are symmetrically rotatably connected to the upper side of the main body 1. A spiral conveying roller 4 is rotatably connected to the middle of the main body 1. A drive rod 5 is rotatably connected to the lower bottom surface of the main body 1. The front end of the drive rod 5 and the front end of the spiral conveying roller 4 are connected by a synchronous belt 6. Two suspension mixing rods 7 are symmetrically rotatably connected to the upper bottom surface of the main body 1. Fine shredding cylinders 9 are fixedly connected to the middle of the bottom of the left and right side walls of the main body 1. A shredding motor 10 is fixedly connected to the bottom of the fine shredding cylinder 9. Therefore, the overall structure is compact, and the components work together to form a complete process from waste paper treatment to paper forming, providing a hardware foundation for the efficient use of waste paper microfibrillated fibers in papermaking, enabling continuous production and improving production efficiency.

[0030] The device body 1 has a feed inlet 101 at the top and a crushing chamber 102 at the bottom. The crushing chamber 102 is symmetrically connected to the spiral conveying rollers 4. The front end of the spiral conveying rollers 4 on the left side of the crushing chamber 102 is fixedly connected to the drive motor 2, which is fixedly installed on the front outer wall of the device body 1. The rear ends of the two spiral conveying rollers 4 are fixedly connected to the transmission gears 302 and mesh with each other. Therefore, the feed inlet 101 facilitates the input of waste paper, the crushing chamber 102 provides space for crushing waste paper, and the drive motor 2 drives the two spiral conveying rollers 4 to rotate synchronously in opposite directions through the transmission gears 302. This allows for the initial conveying and compression of waste paper, preparing it for subsequent crushing and improving the continuity of waste paper processing.

[0031] Among them, the outer wall of the crushing roller 3 is provided with crushing blades 301 at equal intervals. The centrifugal end of the crushing blades 301 is "L" shaped and the rotation direction is blade-shaped. Therefore, the "L" shaped crushing blades 301 with the rotation direction is blade-shaped can increase the contact area and cutting force with waste paper, and efficiently shred and crush the waste paper during the rotation process, making the waste paper crushed more uniformly and thoroughly, and improving the crushing efficiency and crushing quality.

[0032] The bottom of the crushing chamber 102 of the main body of the device is concave and connected to the top of the conveying pipe 103, which is fixedly connected to the bottom of the crushing chamber 102. The rear end of the conveying pipe 103 is curved downward. A spiral conveying roller 4 is rotatably connected in the conveying pipe 103. The front end of the spiral conveying roller 4 is connected to the drive motor 2. The drive motor 2 is fixedly installed in the middle of the front outer wall of the main body of the device. Therefore, the concave design at the bottom of the crushing chamber 102 facilitates the collection of crushed waste paper fragments into the conveying pipe 103. The downward curved structure of the rear end of the conveying pipe 103, together with the spiral conveying roller 4, can stably convey the waste paper fragments to the next processing stage under the drive of the drive motor 2, avoiding fragment accumulation and ensuring the smoothness of material conveying.

[0033] By adopting the above technical solution, waste paper is efficiently crushed by the specially shaped crushing blades 301 on the crushing roller 3. The structural design of the crushing chamber 102 and the conveying pipe 103, combined with the function of the spiral conveying roller 4, realizes the continuous and efficient processing of waste paper from input to crushing and then to conveying, which improves the efficiency and quality of waste paper pretreatment and provides a high-quality raw material basis for subsequent microfibrillation treatment.

[0034] The device body 1 has a mixing chamber 104 at its bottom. Two suspension mixing rods 7 are rotatably connected to the bottom of the mixing chamber 104. Mixing blades are connected at equal intervals on the rods of the suspension mixing rods 7. A bevel gear is fixedly connected to the bottom of the suspension mixing rods 7. Therefore, the mixing chamber 104 provides space for mixing fibers with water, etc. When the mixing blades on the two suspension mixing rods 7 rotate, they can fully stir the materials in the chamber, so that the fibers are evenly dispersed in the water. The bevel gear provides a transmission basis for the rotation of the mixing rods, ensuring the uniformity of mixing.

[0035] In this device, a drive rod 5 is rotatably connected to the bottom of the mixing chamber 104 of the main body 1. Drive bevel gears 501 are installed at equal intervals on the drive rod 5. The drive bevel gears 501 and the bevel gears fixedly connected to the bottom of the suspension mixing rod 7 are meshed. A suspension conveying pump 8 is fixedly connected to the middle of the left and right inner walls of the mixing chamber 104. The suspension conveying pump 8 is connected to the fine grinding cylinder 9 at the bottom of the left and right outer walls of the main body 1 through a pipeline. Therefore, the drive bevel gears 501 on the drive rod 5 mesh with the bevel gears at the bottom of the suspension mixing rod 7, realizing the effective transmission of power and driving the mixing rod to rotate for thorough mixing. The suspension conveying pump 8 can stably convey the uniformly mixed fiber suspension to the fine grinding cylinder 9, ensuring the continuity of subsequent processing.

[0036] The fine grinding cylinder 9 has pipes connected to the middle of its upper end face and the rear side of its lower end face. Two cylindrical guide plates 901 are located inside the fine grinding cylinder 9. The outer guide plate 901 is sleeved on the outer wall of the inner guide plate 901. The top of the inner guide plate 901 is fixedly connected to the inner top wall of the fine grinding cylinder 9, and the bottom of the outer guide plate 901 is fixedly connected to the inner bottom wall of the fine grinding cylinder 9. The top shaft of the grinding motor 10 is rotatably connected to the inner guide plate 901 of the fine grinding cylinder 9. Crushing blades 1001 are installed at equal intervals on the rotating shaft. The rear end pipe of the fine crushing cylinder 9 is connected to a spray nozzle. Therefore, the two cylindrical guide plates 901 form a specific flow channel, which allows the fiber suspension to flow in an orderly manner in the fine crushing cylinder 9, prolonging the contact time with the crushing blades 1001. The crushing motor 10 drives the crushing blades 1001 to rotate at high speed, further refining and crushing the fibers, significantly improving the degree of fiber microfibrillation. The spray nozzle can evenly spray out the microfibrillated fiber suspension, preparing it for paper forming.

[0037] By adopting the above technical solution, the fiber and water are evenly mixed by the full stirring of the suspension mixing rod 7 in the mixing chamber 104, the transmission of the drive rod 5 ensures the stability of the mixing, the suspension conveying pump 8 realizes the smooth conveying of the suspension, and the cooperation of the guide plate 901 and the pulverizing blade 1001 in the fine pulverizing cylinder 9 greatly improves the degree of fiber microfibrillation, thereby improving the overall quality of the fiber suspension and providing high-quality raw materials for subsequent paper forming.

[0038] The main body 1 of the device is fixedly connected to a forming support 105. The top of the forming support 105 is inclined and symmetrically connected to two forming conveyor belts 12. The front ends of the two forming conveyor belts 12 are located on the upper and lower sides of the spray nozzle at the rear end of the fine crushing cylinder 9. The top of the forming support 105 is fixedly connected to a blowing support 106. A fan is installed at a medium distance on the blowing support 106 and faces the lower surface of the forming conveyor belts 12 at the top of the forming support 105. Therefore, the forming support 105 provides support for paper forming. The inclined forming conveyor belts 12 are convenient for receiving the fiber suspension sprayed from the spray nozzle. The arrangement of the two conveyor belts can initially clamp the suspension. The fan on the blowing support 106 blows air onto the lower surface of the conveyor belts, which accelerates the evaporation of water in the suspension and promotes the initial formation of wet paper web.

[0039] The device body 1 has four rows of vacuum suction tanks 107 fixedly connected to the lower side of the blowing bracket 106 connected to the forming bracket 105 on the rear side. The vacuum suction tanks 107 and the fans in the blowing bracket 106 are matched. A filter screen is fastened to the top end face of the vacuum suction tank 107 and is attached to the forming conveyor belt 12. The bottom of the vacuum suction tanks 107 is connected to the collection pipe 10701. A centrifugal fan 11 is fixedly connected to the rear end of the collection pipe 10701. Therefore, the vacuum suction tanks 107 and the centrifugal fan 11 work together to generate negative pressure under the action of the collection pipe 10701, which can quickly remove the moisture in the fiber suspension on the forming conveyor belt 12. The filter screen can prevent fiber loss. The cooperation with the fans of the blowing bracket 106 further improves the dewatering efficiency and speeds up the forming speed and quality of the wet paper web.

[0040] Using the above technical solution, the forming bracket 105 provides stable support, the two inclined forming conveyor belts 12 effectively receive and initially clamp the fiber suspension, the fan on the blowing bracket 106 accelerates the evaporation of moisture, and the negative pressure generated by the vacuum suction filter tank 107 and the centrifugal fan 11 quickly dehydrates the paper. The filter screen prevents fiber loss. The synergistic effect of all parties significantly improves the forming speed and quality of the wet paper web, laying a good foundation for subsequent paper processing.

[0041] This invention discloses a process for a waste paper microfibrillated fiber pretreatment device, comprising the following steps: 1) First, waste paper is fed into the feed port 101 at the top of the main body 1 of the device. The drive motor 2 is started and drives the two crushing rollers 3 to rotate synchronously in opposite directions through the transmission gear 302. The waste paper is initially conveyed and squeezed. At the same time, the crushing blades 301 on the crushing rollers 3 shred and crush the waste paper. The crushed waste paper fragments are guided into the conveying pipe 103 by the concave structure at the bottom of the crushing chamber 102. 2) The fiber is conveyed to the mixing chamber 104 by the spiral conveyor roller 4. The drive motor 2 at the front end of the spiral conveyor roller 4 drives the drive rod 5 to rotate through the synchronous belt 6. The drive rod 5 drives the suspension mixing rod 7 to rotate through the drive bevel gear 501, so that the fiber and water are fully mixed in the mixing chamber 104 to form a fiber suspension. 3) The suspension pump 8 transports the fiber suspension to the fine grinding cylinder 9. Under the guidance of the two layers of guide plates 901, it comes into full contact with the grinding blades 1001 driven by the grinding motor 10. After the microfibrillation treatment is completed, the suspension is sprayed out through the spray nozzle. 4) The sprayed suspension falls between the two forming conveyor belts 12 on the forming support 105. The fan of the blowing support 106 blows air to accelerate the evaporation of moisture. At the same time, the centrifugal fan 11 generates negative pressure in the vacuum suction tank 107 through the collection pipe 10701, which, together with the filter screen, quickly absorbs away the moisture, and finally forms a wet paper web, which is then transported by the forming conveyor belt 12 to the subsequent processing stage.

[0042] The specific usage and function of this embodiment: In this invention, waste paper is first fed into the feed inlet 101 at the top of the main body 1 of the device. The drive motor 2 is started, and the two crushing rollers 3 are driven to rotate synchronously in opposite directions through the transmission gear 302, which initially conveys and squeezes the waste paper. At the same time, the crushing blades 301 on the crushing rollers 3 shred and crush the waste paper. The crushed waste paper fragments are guided into the conveying pipe 103 by the concave structure at the bottom of the crushing chamber 102, and are conveyed to the mixing chamber 104 by the spiral conveying roller 4. The drive rod 5 drives the suspension mixing rod 7 to rotate through the drive bevel gear 501, so that the fiber and water are filled in the mixing chamber 104. The fibers are mixed to form a fiber suspension. Then, the suspension pump 8 delivers the fiber suspension to the fine grinding cylinder 9. Under the guidance of two layers of guide plates 901, the fiber suspension comes into full contact with the grinding blades 1001 driven by the grinding motor 10. After the microfibrillation treatment is completed, the suspension is sprayed out through the spray nozzle. The sprayed suspension falls between the two forming conveyor belts 12 on the forming support 105. The fan of the blowing support 106 blows air to accelerate the evaporation of water. At the same time, the centrifugal fan 11 creates negative pressure in the vacuum suction tank 107 through the collection pipe 10701, which, together with the filter screen, quickly absorbs away the water. Finally, a wet paper web is formed and transported by the forming conveyor belt 12 to the subsequent processing stage.

[0043] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A waste paper microfibrillated fiber pretreatment device, characterized in that, The device includes a main body (1); two crushing rollers (3) are symmetrically rotatably connected to the upper side of the main body (1), a spiral conveying roller (4) is rotatably connected to the middle of the main body (1), a drive rod (5) is rotatably connected to the lower bottom surface of the main body (1), the front end of the drive rod (5) and the front end of the spiral conveying roller (4) are connected by a synchronous belt (6), two suspension mixing rods (7) are symmetrically rotatably connected to the upper bottom surface of the main body (1), a fine crushing cylinder (9) is fixedly connected to the middle of the bottom of the left and right side walls of the main body (1), and a crushing motor (10) is fixedly connected to the bottom of the fine crushing cylinder (9).

2. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, The device body (1) has a feed inlet (101) at the top and a crushing chamber (102) at the bottom of the feed inlet (101). The crushing chamber (102) is symmetrically connected to the spiral conveying roller (4). The front end of the spiral conveying roller (4) on the left side of the crushing chamber (102) is fixedly connected to the drive motor (2). The drive motor (2) is fixedly installed on the front outer wall of the device body (1). The rear ends of the two spiral conveying rollers (4) are fixedly connected to the transmission gear (302) and mesh with each other.

3. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, The crushing roller (3) has crushing blades (301) evenly spaced on its outer side wall. The centrifugal end of the crushing blades (301) is "L" shaped and rotates in the direction of blades.

4. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, The bottom of the inner cavity of the crushing chamber (102) of the main body of the device is concave and connected to the top of the conveying pipe (103) which is fixedly connected to the bottom of the crushing chamber (102). The rear end of the conveying pipe (103) is bent downward. A spiral conveying roller (4) is rotatably connected in the conveying pipe (103). The front end of the spiral conveying roller (4) is connected to the drive motor (2). The drive motor (2) is fixedly installed in the middle of the front outer wall of the main body of the device (1).

5. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, The bottom of the main body (1) of the device is provided with a mixing chamber (104). Two suspension mixing rods (7) are rotatably connected to the bottom of the mixing chamber (104). Mixing fan blades are connected at equal intervals on the rod body of the suspension mixing rod (7). A bevel gear is fixedly connected to the bottom end of the suspension mixing rod (7).

6. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, A drive rod (5) is rotatably connected to the bottom of the mixing chamber (104) of the main body of the device (1). Drive bevel gears (501) are installed at equal intervals on the drive rod (5). The drive bevel gears (501) and the bevel gears fixedly connected to the bottom of the suspension mixing rod (7) are meshed. A suspension transfer pump (8) is fixedly connected to the middle of the left and right inner walls of the mixing chamber (104). The suspension transfer pump (8) is connected to the fine grinding cylinder (9) at the bottom of the left and right outer walls of the main body of the device (1) through a pipe.

7. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, The fine grinding cylinder (9) has pipes connected to the middle of the upper end face and the rear side of the lower end face. The fine grinding cylinder (9) has two cylindrical guide plates (901) in the middle of the interior. The outer guide plate (901) is sleeved on the outer wall of the inner guide plate (901). The top of the inner guide plate (901) is fixedly connected to the top inner wall of the fine grinding cylinder (9). The bottom of the outer guide plate (901) is fixedly connected to the bottom inner wall of the fine grinding cylinder (9). The top shaft of the grinding motor (10) is rotatably connected to the inner guide plate (901) of the fine grinding cylinder (9). Grinding blades (1001) are installed at equal intervals on the shaft of the grinding motor (10). The rear end pipe of the fine grinding cylinder (9) is connected to a spray nozzle.

8. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, The main body (1) of the device is fixedly connected to the rear side of the forming bracket (105). The top of the forming bracket (105) is inclined and symmetrically connected to two forming conveyor belts (12). The front ends of the two forming conveyor belts (12) are located on the upper and lower sides of the spray nozzle at the rear end of the fine crushing cylinder (9). The top of the forming bracket (105) is fixedly connected to the blowing bracket (106). The blowing bracket (106) has a fan installed at a medium distance towards the lower surface of the forming conveyor belt (12) at the top of the forming bracket (105).

9. The waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, The device body (1) has four rows of vacuum suction tanks (107) fixedly connected to the lower side of the blowing bracket (106) connected to the rear forming bracket (105). The positions of the fans in the vacuum suction tanks (107) and the blowing bracket (106) are matched. A filter screen is fastened to the top end face of the vacuum suction tank (107). The filter screen is attached to the forming conveyor belt (12). The bottom of the vacuum suction tanks (107) is connected to the collection pipe (10701). A centrifugal fan (11) is fixedly connected to the rear end of the collection pipe (10701).

10. The process of the waste paper microfibrillated fiber pretreatment device as described in claim 1, characterized in that, Includes the following steps: 1) First, waste paper is fed into the feed port (101) at the top of the main body (1) of the device. The drive motor (2) is started and the two crushing rollers (3) are driven to rotate synchronously in opposite directions through the transmission gear (302) to initially convey and squeeze the waste paper. At the same time, the crushing blades (301) on the crushing rollers (3) shred and crush the waste paper. The crushed waste paper fragments are guided into the conveying pipe (103) under the guidance of the concave structure at the bottom of the crushing chamber (102). 2) The fiber is conveyed to the mixing chamber (104) by the spiral conveyor roller (4). The drive motor (2) at the front end of the spiral conveyor roller (4) drives the drive rod (5) to rotate through the synchronous belt (6). The drive rod (5) drives the suspension mixing rod (7) to rotate through the drive bevel gear (501), so that the fiber and water are fully mixed in the mixing chamber (104) to form a fiber suspension. 3) The suspension pump (8) transports the fiber suspension to the fine grinding cylinder (9), and under the guidance of the two layers of guide plates (901), it comes into full contact with the grinding blades (1001) driven by the grinding motor (10). The suspension after microfibrillation is sprayed out through the spray nozzle. 4) The sprayed suspension falls between the two forming conveyor belts (12) on the forming support (105). The fan of the blowing support (106) blows air to accelerate the evaporation of moisture. At the same time, the centrifugal fan (11) generates negative pressure in the vacuum suction tank (107) through the collection pipe (10701), which, together with the filter screen, quickly absorbs away the moisture, and finally forms a wet paper web, which is then transported to the subsequent processing stage by the forming conveyor belt (12).

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