Preparation device and method of high-whiteness chemi-mechanical pulp

Abstract

The invention discloses a preparation device and method of high-whiteness chemi-mechanical pulp, and relates to the technical field of chemi-mechanical pulp preparation, the preparation device comprises a fixing frame, an extrusion dehydration device is fixedly mounted in the fixing frame, the extrusion dehydration device comprises a motor and an extrusion cover, and a mounting frame is fixedly mounted on one side of the bottom surface of the fixing frame; a discharging device is fixedly installed on one side of the bottom face of the fixing frame, a collecting device is arranged below a discharging pipe, slurry needing to be dewatered is conveyed into an extrusion dewatering device through a feeding hopper to be subjected to extrusion dewatering treatment, and the dewatered slurry falls onto a receiving table of the discharging device through a discharging opening. Smashed slurry falling onto a receiving table is scattered through a scattering roller of a discharging device, the drying quality and drying efficiency of the slurry are improved, two identical collecting devices are matched with an extrusion dewatering device for use, liquid separated from the slurry in the extrusion dewatering device is discharged into a collecting box through a discharging pipe and a liquid inlet to be collected, and therefore the slurry drying efficiency is improved. And the working intensity of workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of chemimechanical pulp preparation, and in particular to a device and method for preparing high-whiteness chemimechanical pulp. Background Art

[0002] Chemimechanical pulp is a new type of pulping method. It is very different from traditional mechanical pulp and can replace chemical pulp to produce various paper and paperboard products. After the chemimechanical pulp is processed, it needs to be squeezed and dehydrated by a special extrusion dehydration device to reduce the moisture content in the pulp and improve the drying efficiency of the pulp. The dehydration of chemimechanical pulp is a key step to ensure product quality and smooth subsequent processing.

[0003] However, when the existing extrusion dewatering device for chemical-mechanical pulp is working, the dehydrated pulp is easily agglomerated after being discharged from the discharge port under the squeezing of the extrusion mechanism in the extrusion dewatering device, resulting in affecting the subsequent drying quality and drying efficiency of the pulp when it is sent to the drying device for drying. In addition, the discharged pulp is mostly discharged directly to the ground and is later collected and processed manually, which affects the processing efficiency of the pulp. Secondly, there is no special collection device to collect the liquid after the pulp is dehydrated. In view of the above problems, the inventors proposed a preparation device and method for high-whiteness chemical-mechanical pulp to solve the above problems. Summary of the invention

[0004] In order to solve the problem that the existing extrusion dewatering device for chemical mechanical pulp is prone to agglomeration during operation, which affects the subsequent drying quality and drying efficiency of the pulp; the purpose of the present invention is to provide a preparation device and method for high-whiteness chemical mechanical pulp.

[0005] To solve the above technical problems, the present invention adopts the following technical scheme: a device and method for preparing high-whiteness mechanical pulp, comprising a fixed frame, an extrusion dehydration device is fixedly installed in the fixed frame, the extrusion dehydration device comprises a motor and an extrusion hood, a discharge port is opened on one side of the extrusion hood, a mounting frame is fixedly installed on one side of the bottom surface of the fixed frame, the motor is fixedly installed on the top surface of the mounting frame, a connecting shaft is fixedly installed on the output end of the motor, one end of the connecting shaft is fixedly connected to an extrusion mechanism, the extrusion mechanism is rotatably installed in the extrusion hood, a drain pipe is fixedly installed in the middle of the bottom surface of the extrusion hood, a connecting bucket is fixedly installed on the bottom surface of the drain pipe, a discharge pipe is fixedly installed on the bottom surface of the connecting bucket, a valve body is installed on the surface of the discharge pipe, a feeding device is fixedly installed on one side of the bottom surface of the fixed frame, and a collecting device is provided below the discharge pipe.

[0006] Preferably, the unloading device includes a positioning frame, a material receiving platform is fixedly installed on the bottom surface of the positioning frame, a fixing frame is fixedly installed in the positioning frame, a rotating shaft is rotatably installed in the fixing frame, a surface fixed sleeve of the rotating shaft is provided with a scattering roller, a driving shaft is fixedly installed on one end of the rotating shaft, an end of the driving shaft away from the rotating shaft passes through the positioning frame and is fixedly installed with a first pulley, a bearing seat is fixedly installed on one side of the top surface of the fixing frame, a transmission shaft is rotatably installed in the bearing seat, one end of the transmission shaft is fixedly installed with a transmission gear, one end of the surface of the connecting shaft is fixedly provided with a driving gear, the driving gear is meshed with the transmission gear, a second pulley is fixedly installed on one end of the transmission shaft away from the transmission gear, and a transmission belt is sleeved on the surfaces of the first pulley and the second pulley.

[0007] Preferably, the collecting device comprises a fixed table, a collecting box is fixedly mounted on the top surface of the fixed table, a liquid inlet is fixedly mounted in the middle of the top surface of the collecting box, the liquid inlet cooperates with the discharge pipe, universal positioning wheels are mounted on the four corners of the bottom surface of the fixed table, a push handle is fixedly mounted on one side of the top surface of the fixed table, the push handle cooperates with the universal positioning wheel, and an observation window is provided in one side of the collecting box.

[0008] Preferably, a conveying mechanism is installed below the unloading device, and the conveying mechanism includes a conveyor belt, and the conveyor belt cooperates with the receiving platform. A drain pipe is fixedly installed in the middle of the bottom surface of the collecting box, and the end of the drain pipe away from the collecting box passes through the fixed platform, and a control valve is fixedly installed on the surface of the drain pipe, and a loading hopper is fixedly installed on one side of the top surface of the fixed frame, and the loading hopper cooperates with the extrusion cover. Both ends of the surface of the rotating shaft are sleeved with rotating parts, and the number of the rotating parts is four. Two of the rotating parts are respectively fixedly installed on both sides of the fixed frame, and a mounting groove is opened on one side of the top surface of the fixed frame, and the bearing seat is fixedly installed in the mounting groove. Support seats are symmetrically installed on both sides of the fixed frame, and the number of the support seats is four. Support legs are fixedly installed on the bottom surfaces of the four support seats.

[0009] A method for preparing high-whiteness chemical mechanical pulp comprises the following steps: Step 1: The slurry to be dehydrated is transported to the extrusion dehydration device through the upper hopper for extrusion dehydration treatment, the water from the slurry dethreshing is discharged through the discharge pipe, and the dehydrated slurry is discharged through the discharge port; Step 2: Move the collecting device to the bottom of the discharge pipe so that its liquid inlet is located directly below the discharge pipe, and collect the water discharged from the discharge pipe through the collecting box of the collecting device; Step 3: The slurry discharged from the discharge port is processed by the unloading device. With the cooperation of the scattering roller and the receiving table, the slurry after dehydration is scattered to facilitate its subsequent drying; Step 4: The dispersed slurry in the receiving table slides onto the conveyor belt of the conveying mechanism and is transported to the designated drying equipment for drying through the conveyor belt.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the slurry to be dehydrated is transported to the extrusion dehydration device through the upper hopper for extrusion dehydration treatment, and the dehydrated slurry falls to the receiving table of the unloading device through the discharge port, and the slurry that has agglomerated on the receiving table is dispersed by the dispersing roller of the unloading device, thereby improving the drying quality and drying efficiency of the slurry; 2. In the present invention, two identical collecting devices are used in conjunction with the extrusion dehydration device, and the liquid separated from the slurry in the extrusion dehydration device is discharged into the collection box through the discharge pipe and the liquid inlet for collection, thereby reducing the work intensity of the staff; 3. In the present invention, the length of the conveying mechanism depends on the distance between the extrusion dehydration device and the drying device. The dehydrated and broken up slurry is conveyed to the drying device for drying by the conveyor belt of the conveying mechanism. There is no need for manual material collection and feeding, thereby improving the processing efficiency of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention. Figure 2 For the present invention Figure 1 A magnified view of the structure in the middle. Figure 3 For the present invention Figure 1 The enlarged view of the structure at B in the middle. Figure 4 It is a schematic diagram of the structure of the feeding device of the present invention. Figure 5 This is a schematic diagram of the internal structure of the feeding device of the present invention. Figure 6 It is a schematic diagram of the structure of the collecting device of the present invention.

[0013] In the figure: 1, fixed frame; 2, extrusion dehydration device; 3, unloading device; 4, collecting device; 5, conveying mechanism; 11, mounting frame; 12, support seat; 13, support leg; 14, mounting groove; 21, motor; 22, connecting shaft; 221, driving gear; 23, extrusion mechanism; 24, extrusion cover; 241, discharge port; 25, drainage pipe; 26, connecting bucket; 27, discharge pipe; 271, valve body; 28, upper hopper; 31, positioning frame; 32, Receiving table; 33, fixed frame; 331, rotating shaft; 332, rotating part; 34, breaking roller; 35, driving shaft; 351, first pulley; 36, transmission shaft; 361, transmission gear; 362, second pulley; 363, bearing seat; 37, transmission belt; 41, fixed table; 42, collecting box; 421, liquid inlet; 422, observation window; 43, universal positioning wheel; 44, push handle; 45, drain pipe; 451, control valve; 51, conveyor belt. DETAILED DESCRIPTION

[0014] 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.

[0015] Example: Figure 1-6 As shown, the present invention provides a preparation device and method for high-whiteness mechanical pulp, comprising a fixed frame 1, a squeeze dewatering device 2 is fixedly installed in the fixed frame 1, the squeeze dewatering device 2 comprises a motor 21 and an squeeze cover 24, a discharge port 241 is provided on one side of the squeeze cover 24, a mounting frame 11 is fixedly installed on one side of the bottom surface of the fixed frame 1, the motor 21 is fixedly installed on the top surface of the mounting frame 11, a connecting shaft 22 is fixedly installed on the output end of the motor 21, one end of the connecting shaft 22 is fixedly connected to an squeeze mechanism 23, the squeeze mechanism 23 is rotatably installed in the squeeze cover 24, a drain pipe 25 is fixedly installed in the middle of the bottom surface of the squeeze cover 24, a connecting bucket 26 is fixedly installed on the bottom surface of the drain pipe 25, a discharge pipe 27 is fixedly installed on the bottom surface of the connecting bucket 26, a valve body 271 is installed on the surface of the discharge pipe 27, a feeding device 3 is fixedly installed on one side of the bottom surface of the fixed frame 1, and a collecting device 4 is provided below the discharge pipe 27; The installation and fixation of the extrusion dehydration device 2 is completed by the fixing frame 1. The extrusion dehydration device 2 is a prior art. The motor 21 controls the connecting shaft 22 to drive the extrusion mechanism 23 to operate in the extrusion cover 24 to complete the dehydration of the slurry entering the extrusion cover 24. The water separated from the slurry is discharged through the drainage pipe 25, the connecting bucket 26 and the discharge pipe 27, and is collected by the collecting device 4. The dehydrated slurry is discharged through the discharge port 241 to the receiving table 32 of the unloading device 3 for processing.

[0016] The unloading device 3 includes a positioning frame 31, a receiving platform 32 is fixedly installed on the bottom surface of the positioning frame 31, a fixing frame 33 is fixedly installed in the positioning frame 31, a rotating shaft 331 is rotatably installed in the fixing frame 33, a scattering roller 34 is fixedly sleeved on the surface of the rotating shaft 331, a driving shaft 35 is fixedly installed on one end of the rotating shaft 331, an end of the driving shaft 35 away from the rotating shaft 331 passes through the positioning frame 31 and is fixedly installed with a first pulley 351, a bearing seat 363 is fixedly installed on one side of the top surface of the fixing frame 1, a transmission shaft 36 is rotatably installed in the bearing seat 363, a transmission gear 361 is fixedly installed on one end of the transmission shaft 36, a driving gear 221 is fixedly sleeved on one end of the surface of the connecting shaft 22, the driving gear 221 is meshed with the transmission gear 361, a second pulley 362 is fixedly installed on the end of the transmission shaft 36 away from the transmission gear 361, and a transmission belt 37 is sleeved on the surfaces of the first pulley 351 and the second pulley 362; By adopting the above technical scheme, when the extrusion dewatering device 2 is working, the dehydrated slurry is discharged through the discharge port 241, and the discharged slurry falls onto the receiving platform 32 of the unloading device 3. When the extrusion dewatering device 2 is running, the connecting shaft 22 drives the driving gear 221 to rotate, and the driving gear 221 controls the transmission gear 361 to drive the transmission shaft 36 to rotate. When the transmission shaft 36 rotates, it drives the second pulley 362 to rotate. With the cooperation of the transmission belt 37, the first pulley 351 is controlled to drive the driving shaft 35 to rotate, and the driving shaft 35 drives the rotating shaft 331 and the scattering roller 34 to operate. The slurry that has fallen onto the receiving platform 32 is scattered by the scattering roller 34. After the slurry is scattered, it slides onto the conveyor belt 51 of the conveying mechanism 5.

[0017] The collecting device 4 includes a fixed platform 41, a collecting box 42 is fixedly installed on the top surface of the fixed platform 41, a liquid inlet 421 is fixedly installed in the middle of the top surface of the collecting box 42, the liquid inlet 421 cooperates with the discharge pipe 27, universal positioning wheels 43 are installed at the four corners of the bottom surface of the fixed platform 41, a push handle 44 is fixedly installed on one side of the top surface of the fixed platform 41, the push handle 44 cooperates with the universal positioning wheel 43, and an observation window 422 is provided in one side of the collecting box 42; By adopting the above technical scheme, two identical collecting devices 4 are used in conjunction with the extrusion dehydration device 2, and the collection box 42 is installed and fixed by the fixing table 41. With the cooperation of four universal positioning wheels 43 and the push handle 44, the collecting device 4 is controlled to move to the bottom of the discharge pipe 27. When the liquid inlet 421 is located directly below the discharge pipe 27, the movement of the collecting device 4 is completed, and the liquid separated from the slurry in the extrusion dehydration device 2 is discharged into the collection box 42 through the discharge pipe 27 and the liquid inlet 421 for collection. The collection status in the collection box 42 is observed through the observation window 422. When the collection box 42 is full, the valve body 271 is closed, and a new collecting device 4 is replaced to open the switch of the valve body 271 to continue collecting the liquid separated from the slurry.

[0018] A conveying mechanism 5 is installed below the unloading device 3. The conveying mechanism 5 includes a conveying belt 51. The conveying belt 51 cooperates with the receiving platform 32. By adopting the above technical scheme, the conveying mechanism 5 is an existing technology, and the conveyor belt 51 is controlled by the driving device to operate. The length of the conveying mechanism 5 depends on the distance between the extrusion dehydration device 2 and the drying device. The conveyor belt 51 of the conveying mechanism 5 conveys the dehydrated and broken up slurry to the drying device for drying.

[0019] A drain pipe 45 is fixedly installed in the middle of the bottom surface of the collection box 42. One end of the drain pipe 45 away from the collection box 42 passes through the fixed platform 41. A control valve 451 is fixedly installed on the surface of the drain pipe 45. By adopting the above technical solution, when the collection box 42 of the collection device 4 completes the collection, the collection device 4 is moved to the designated drainage area, the switch of the control valve 451 is opened, and the slurry collected in the collection box 42 is discharged through the drainage pipe 45.

[0020] An upper hopper 28 is fixedly mounted on one side of the top surface of the fixing frame 1, and the upper hopper 28 cooperates with the extrusion cover 24; By adopting the above technical solution, the slurry to be dehydrated is transported to the extrusion cover 24 of the extrusion dehydration device 2 through the upper hopper 28, and is extruded and dehydrated through the extrusion mechanism 23.

[0021] Both ends of the surface of the rotating shaft 331 are sleeved with rotating members 332, and the number of the rotating members 332 is four, and two rotating members 332 are fixedly installed in the two sides of the fixed frame 33 respectively; By adopting the above technical solution, the installation and positioning of the rotating shaft 331 in the fixed frame 33 is completed by the two rotating members 332 , and the auxiliary rotating shaft 331 and the breaking roller 34 rotate in the fixed frame 33 at the same time.

[0022] A mounting groove 14 is provided on one side of the top surface of the fixing frame 1, and the bearing seat 363 is fixedly installed in the mounting groove 14; By adopting the above technical solution, the bearing seat 363 is installed and fixed through the installation groove 14, and operates in conjunction with the corresponding transmission shaft 36.

[0023] Support seats 12 are symmetrically installed on both sides of the fixing frame 1. There are four support seats 12. Support legs 13 are fixedly installed on the bottom surfaces of the four support seats 12. By adopting the above technical solution, the corresponding support legs 13 are installed and fixed through the four support seats 12, and the device is installed in a designated area through the four support legs 13 to perform slurry dehydration work.

[0024] A method for preparing high-whiteness chemical mechanical pulp comprises the following steps: Step 1: The slurry to be dehydrated is transported to the extrusion dehydration device 2 through the upper hopper 28 for extrusion dehydration treatment, the water from the slurry dehydration is discharged through the discharge pipe 27, and the dehydrated slurry is discharged through the discharge port 241; Step 2: Move the collecting device 4 to below the discharge pipe 27 so that the liquid inlet 421 is located directly below the discharge pipe 27, and collect the water discharged from the discharge pipe 27 through the collecting box 42 of the collecting device 4; Step 3: The slurry discharged from the discharge port 241 is processed by the unloading device 3, and the slurry after dehydration is scattered with the cooperation of the scrambling roller 34 and the receiving table 32, so as to facilitate drying thereof later; Step 4: The dispersed slurry in the receiving table 32 slides onto the conveyor belt 51 of the conveying mechanism 5 and is transported to a designated drying device through the conveyor belt 51 for drying.

[0025] Working principle: The slurry to be dehydrated is transported to the extrusion dehydration device 2 through the upper hopper 28 for extrusion dehydration treatment. When the extrusion dehydration device 2 is working, the dehydrated slurry is discharged through the discharge port 241, and the discharged slurry falls on the receiving platform 32 of the unloading device 3. When the extrusion dehydration device 2 is running, the connecting shaft 22 drives the driving gear 221 to rotate, and the driving gear 221 controls the transmission gear 361 to drive the transmission shaft 36 to rotate. When the transmission shaft 36 rotates, it drives the second pulley 362 to rotate. Under the cooperation of the transmission belt 37, the first pulley 351 is controlled to drive the driving shaft 35 to rotate, and the driving shaft 35 drives the rotating shaft 331 and the scattering roller 34 to operate. The slurry that has fallen on the receiving platform 32 is scattered by the scattering roller 34. After the slurry is scattered, it slides onto the conveyor belt 51 of the conveying mechanism 5. The dehydrated and scattered slurry is transported to the drying device for drying by the conveyor belt 51 of the conveying mechanism 5. Two identical collecting devices 4 are used in conjunction with the extrusion dehydration device 2. With the cooperation of four universal positioning wheels 43 and a push handle 44, the collecting device 4 is controlled to move to the bottom of the discharge pipe 27. When the liquid inlet 421 is located directly below the discharge pipe 27, the collecting device 4 is moved completely. The liquid separated from the slurry in the extrusion dehydration device 2 is discharged into the collecting box 42 through the discharge pipe 27 and the liquid inlet 421 for collection. The collection status in the collecting box 42 is observed through the observation window 422. When the collecting box 42 is full, the valve body 271 is closed, and a new collecting device 4 is replaced. The switch of the valve body 271 is turned on to continue collecting the liquid separated from the slurry. The collecting device 4 that has completed the collection is moved to the designated drainage area, the switch of the control valve 451 is turned on, and the slurry collected in the collecting box 42 is discharged through the drainage pipe 45.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A device and method for preparing high-whiteness chemical mechanical pulp, comprising a fixed frame (1), characterized in that: An extrusion dehydration device (2) is fixedly installed in the fixed frame (1), and the extrusion dehydration device (2) comprises a motor (21) and an extrusion cover (24), and a discharge port (241) is provided on one side of the extrusion cover (24). A mounting frame (11) is fixedly installed on one side of the bottom surface of the fixed frame (1), and the motor (21) is fixedly installed on the top surface of the mounting frame (11). A connecting shaft (22) is fixedly installed on the output end of the motor (21), and one end of the connecting shaft (22) is fixedly connected to an extrusion mechanism (23). ), the extrusion mechanism (23) is rotatably mounted in an extrusion cover (24), a drainage pipe (25) is fixedly mounted in the middle of the bottom surface of the extrusion cover (24), a connecting bucket (26) is fixedly mounted on the bottom surface of the drainage pipe (25), a discharge pipe (27) is fixedly mounted on the bottom surface of the connecting bucket (26), a valve body (271) is mounted on the surface of the discharge pipe (27), a feeding device (3) is fixedly mounted on one side of the bottom surface of the fixed frame (1), and a collecting device (4) is provided below the discharge pipe (27).

2. The device and method for preparing high whiteness chemical mechanical pulp according to claim 1, characterized in that: The unloading device (3) comprises a positioning frame (31), a material receiving platform (32) is fixedly installed on the bottom surface of the positioning frame (31), a fixing frame (33) is fixedly installed inside the positioning frame (31), a rotating shaft (331) is rotatably installed inside the fixing frame (33), a scattering roller (34) is fixedly sleeved on the surface of the rotating shaft (331), a driving shaft (35) is fixedly installed at one end of the rotating shaft (331), an end of the driving shaft (35) away from the rotating shaft (331) passes through the positioning frame (31) and is fixedly installed with a first pulley (351), and a top of the fixing frame (1) is provided with a fixed frame (33) and a rotating shaft (331) is fixedly sleeved on the surface of the rotating shaft (331). A bearing seat (363) is fixedly installed in one side of the surface, a transmission shaft (36) is rotatably installed in the bearing seat (363), a transmission gear (361) is fixedly installed on one end of the transmission shaft (36), a driving gear (221) is fixedly sleeved on one end of the surface of the connecting shaft (22), the driving gear (221) is meshed with the transmission gear (361), a second pulley (362) is fixedly installed on one end of the transmission shaft (36) away from the transmission gear (361), and a transmission belt (37) is sleeved on the surfaces of the first pulley (351) and the second pulley (362).

3. The device and method for preparing high whiteness chemical mechanical pulp according to claim 1, characterized in that: The collecting device (4) comprises a fixed platform (41), a collecting box (42) is fixedly mounted on the top surface of the fixed platform (41), a liquid inlet (421) is fixedly mounted in the middle of the top surface of the collecting box (42), the liquid inlet (421) cooperates with the discharge pipe (27), universal positioning wheels (43) are mounted on the four corners of the bottom surface of the fixed platform (41), a push handle (44) is fixedly mounted on one side of the top surface of the fixed platform (41), the push handle (44) cooperates with the universal positioning wheel (43), and an observation window (422) is provided in one side of the collecting box (42).

4. The device and method for preparing high whiteness chemical mechanical pulp according to claim 1, characterized in that: A conveying mechanism (5) is installed below the unloading device (3), and the conveying mechanism (5) comprises a conveying belt (51), and the conveying belt (51) cooperates with the material receiving platform (32).

5. The device and method for preparing high whiteness chemical mechanical pulp according to claim 3, characterized in that: A drainage pipe (45) is fixedly mounted in the middle of the bottom surface of the collection box (42); one end of the drainage pipe (45) away from the collection box (42) passes through the fixed platform (41); and a control valve (451) is fixedly mounted on the surface of the drainage pipe (45).

6. The device and method for preparing high whiteness chemical mechanical pulp according to claim 1, characterized in that: An upper hopper (28) is fixedly mounted on one side of the top surface of the fixed frame (1), and the upper hopper (28) cooperates with the extrusion cover (24).

7. The device and method for preparing high whiteness chemical mechanical pulp according to claim 2, characterized in that: Rotating members (332) are sleeved on both ends of the surface of the rotating shaft (331), the number of the rotating members (332) is four, and two rotating members (332) are respectively fixedly mounted on two sides of the fixed frame (33).

8. The device and method for preparing high whiteness chemical mechanical pulp according to claim 2, characterized in that: A mounting groove (14) is provided on one side of the top surface of the fixing frame (1), and the bearing seat (363) is fixedly mounted in the mounting groove (14).

9. The device and method for preparing high whiteness chemical mechanical pulp according to claim 1, characterized in that: Support seats (12) are symmetrically mounted on both sides of the fixing frame (1), the number of the support seats (12) is four, and support legs (13) are fixedly mounted on the bottom surfaces of the four support seats (12).

10. A method for preparing high-whiteness chemical mechanical pulp according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The slurry to be dehydrated is transported to the extrusion dehydration device (2) through the upper hopper (28) for extrusion dehydration treatment, the water from the slurry degranulation is discharged through the discharge pipe (27), and the dehydrated slurry is discharged through the discharge port (241); Step 2: Move the collecting device (4) to below the discharge pipe (27) so that its liquid inlet (421) is located directly below the discharge pipe (27), and collect the water discharged from the discharge pipe (27) through the collecting box (42) of the collecting device (4); Step 3: The slurry discharged from the discharge port (241) is processed by the unloading device (3), and the dewatered slurry is dispersed with the cooperation of the dispersion roller (34) and the receiving platform (32), so as to facilitate subsequent drying; Step 4: The slurry that has been dispersed in the receiving platform (32) slides onto the conveyor belt (51) of the conveying mechanism (5), and is transported to a designated drying device through the conveyor belt (51) for drying.

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