Chemico-mechanical pulp transfer screw press suitable for double bleaching towers

Abstract

The invention discloses an chemi-mechanical pulp transfer screw press suitable for double bleaching towers, and relates to the technical field of chemi-mechanical pulp treatment equipment, a rotating shaft is arranged in the transfer screw press, the diameter of the rotating shaft is obliquely arranged from small to large from left to right, and a spiral stirring blade is fixed on the rotating shaft; the feeding mechanism is arranged on the upper left portion of the two transfer screw press bodies. The dehydration mechanism is connected with the two transfer screw press bodies; the pushing mechanism is connected with the squeezing pipe; the first mounting frame is arranged between the pushing mechanism and the squeezing pipe; the rapid switching of the feeding pipelines is realized, and the continuous dehydration operation of the chemi-mechanical pulp in the double-bleaching-tower system is ensured; online cleaning during blockage is facilitated, and the downtime is shortened; accumulated slurry is thoroughly removed, and residues are prevented from affecting the subsequent process; the two sets of independent transfer screw press bodies are arranged, flexible switching is achieved through the material distribution mechanism, it is ensured that the system can still operate continuously when a single machine is maintained or cleaned, and the overall operation continuity is improved.

Description

Technical Field

[0001] This invention relates to the field of chemical pulping equipment technology, specifically to a chemical pulping transfer screw press suitable for dual bleaching towers. Background Technology

[0002] In the production of chemimechanical pulp, dual bleaching tower systems are commonly used for staged bleaching, requiring continuous transfer and dewatering of the pulp between different bleaching towers. Traditional screw presses, during long-term operation, are prone to clogging of the screen with fibrous impurities, leading to decreased dewatering efficiency and necessitating shutdown for cleaning, severely disrupting the continuous operation of the dual bleaching tower system. Furthermore, existing equipment lacks rapid switching and online cleaning capabilities, affecting overall production efficiency and stability. Therefore, a chemimechanical pulp transfer screw press suitable for dual bleaching towers is proposed. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a chemimechanical pulp transfer screw press suitable for dual bleaching towers. This invention enables rapid switching of the feed pipeline, ensuring continuous dewatering of the chemimechanical pulp in the dual bleaching tower system; facilitates online cleaning in case of blockage, reducing downtime; thoroughly removes accumulated pulp, preventing residue from affecting subsequent processes; and features two independent transfer screw press bodies that can be flexibly switched via a distribution mechanism, ensuring continuous system operation even during single-machine maintenance or cleaning, thus improving overall operational continuity.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: it comprises a conveyor screw press body, a rotating shaft, and a spiral stirring blade; two conveyor screw press bodies are arranged one in front of the other; a rotating shaft is provided inside the conveyor screw press, the left end of the rotating shaft is driven by a motor, the diameter of the rotating shaft is inclined from left to right from small to large, and a spiral stirring blade is fixed on the rotating shaft; two pressing pipes are respectively connected through to the right end of the conveyor screw press body; the pressing pipes are inclined from left to right from low to high. It also includes: The feeding mechanism is located on the upper left side of the two conveyor screw press bodies; A dehydration mechanism, which is connected to two conveyor screw press bodies; A pushing mechanism, which is connected to the pressing tube; The first mounting frame is located between the pushing mechanism and the pressing tube; Through the above technical solution design, the feeding mechanism separately feeds the two conveying screw press bodies. The two conveying screw press bodies take turns conveying and pressing the chemical mechanical pulp through the dewatering mechanism. When it is necessary to switch the working conveying screw press body, the feeding mechanism switches the conveying screw press body that is feeding. The conveying screw press body that stops working uses the pushing mechanism to press out the dewatered chemical mechanical pulp accumulated in the pressing tube, so that the operation is continuous and it is easy to clean the chemical mechanical pulp in the conveying screw press body.

[0005] Preferably, the feeding mechanism comprises: The feed pipe is equipped with a feed hopper. The feed pipes are of two types, and are respectively connected to the bottom of the feed pipe from front to back; the bottom of the feed pipe is inclined outward; the connection between the feed pipe and the feed pipe is an arc-shaped structure and is equipped with a feed dispensing mechanism. The second feed hopper, there are two of them, and they are respectively connected to the upper left side of the ring wall of the main body of the conveyor screw press. Through the above technical solution design, the chemical pulp is conveyed from the No. 1 feed hopper to the feed pipe; the material distribution mechanism blocks one of the material distribution pipes, so that the chemical pulp falls into the main body of the transfer screw press only from one material distribution pipe.

[0006] Preferably, the material dispensing mechanism comprises: The material dispensing motor is fixed to the right side wall of the feed pipe by a bracket and is connected to an external power source. A connecting shaft is screwed into the feed pipe via a bearing housing, and the connecting shaft is connected to the output shaft of the dispensing motor via a coupling. The material distribution plate, there are two of them, and they are respectively fixed to the annular wall of the connecting shaft; With the above technical solution design, when the distribution plate blocks one of the distribution pipes and it is necessary to switch the working transfer screw press body, the distribution motor is started, the connecting shaft rotates, and the distribution plate rotates, blocking the original distribution pipe and opening the other distribution pipe, so that the feeding distribution pipe is switched. At this time, another transfer screw press body is used to press and dewater the chemical pulp, so that the operation is continuous.

[0007] Preferably, the two limiting arc plates are respectively fixed on the upper end of the bottom plate inside the material distribution pipe, and the arc of the limiting arc plates is set to be consistent with the arc of the connection between the feed pipe and the material distribution pipe; Through the above technical solution design, the limiting arc plate prevents the chemical pulp from falling from another feed pipe.

[0008] Preferably, the dehydration mechanism comprises: Fixed semi-rings, wherein there are several fixed semi-rings, and they are respectively located at the front and rear of the main body of the conveyor screw press; The grid filter screen consists of four screens, each with a semi-circular structure. The grid filters are arranged in pairs, one above the other, inside the main body of the conveyor screw press. Fixed half-rings are fixed to both ends of the grid filters. The left and right edges of the grid filters are fitted to the edges of the conveyor screw press body. The collection hoppers are two in number and are respectively located below the lower grid filter screen. The bottom of the collection hoppers is equipped with a drain pipe. The separation mechanism comprises four separate mechanisms, each connected to a fixed half-ring. With the above technical solution design, when the main body of the conveyor screw press is running, the diameter of the rotating shaft is inclined from left to right from small to large, so that the chemical pulp is pressed and the waste liquid flows out through the grid filter into the collection hopper and is discharged through the drain pipe.

[0009] Preferably, the separation mechanism comprises: The second mounting bracket has two components, which are respectively located at the front and rear of the upper and lower fixed semi-rings. The second mounting bracket is arranged in a "C" shape. Two separate motors are provided, each fixed to the inner bottom plate of the second mounting bracket; the separate motors are connected to an external power source. The separation screws consist of four screws, which are threadedly connected to the front and rear ends of the fixed half-ring. The upper separation screw is screwed to the second mounting bracket via a bearing seat, and the lower end of the lower separation screw is connected to the output shaft of the separation motor via a coupling. The threads of the upper and lower separation screws are arranged in opposite directions. With the above technical solution design, after a certain period of use, the separation motor is started, which causes the upper and lower separation screws to rotate. The threads of the upper and lower separation screws are set in opposite directions, which drives the upper and lower fixed half rings to separate, so that the upper and lower grid filter screens are separated, making it easier to clean the grid filter screen.

[0010] Preferably, the push mechanism comprises: There are two No. 1 connecting rods, and each is fixed to the bottom of the pressing tube. There are two No. 1 moving mechanisms, each connected to a No. 1 connecting rod. The second connecting rod is located between the two pressing tubes; a connecting tube is movably sleeved on the second connecting rod. The second moving mechanism is connected to the second connecting rod; the guide ring is hinged to the second connecting rod. The guide rod is movably inserted inside the guide ring, and its two ends are fixed to the second slide rail and the first mounting bracket by rods; the guide ring is inclined from left to right from low to high. The pusher plate, there are two pusher plates, and they are respectively located between two pressing tubes; the pusher plate is hinged to the guide ring through the third connecting rod; With the above technical solution design, when one of the conveyor screw presses stops working, the pressing tube on that side is moved towards the push plate by the first moving mechanism, and the second connecting rod is moved by the second moving mechanism, which drives the guide ring to move on the guide rod, so that the push plate moves in the pressing tube according to the trajectory of the guide rod, and the push plate presses out the dewatered chemical pulp accumulated in the pressing tube.

[0011] Preferably, the first moving mechanism includes: a first moving motor, a first screw, a first slider, and a first slide rail; the first moving motor is fixed on a first mounting frame and connected to an external power source; the output shaft of the first moving motor is connected to the first screw via a coupling; the first screw is threaded through a first connecting rod; a first slider is fixed to the bottom of the first connecting rod, and a first slide rail is slidably mounted on the bottom of the first slider, with the first slide rail fixed to the first mounting frame; With the above technical solution design, starting the No. 1 moving motor causes the No. 1 screw to rotate, and under the action of the No. 1 slider, the pressing tube on this side moves towards the push plate.

[0012] Preferably, the second moving mechanism includes: a second moving motor, a second screw, a second slider, and a second slide rail; the second moving motor is fixed on the right side wall of the first mounting frame and is connected to an external power source; the output shaft of the second moving motor is connected to the second screw via a coupling; the second screw is threaded through the second connecting rod; the bottom of the second connecting rod is fixed to the second slider, and the bottom of the second slider is slidably provided with the second slide rail, which is fixed to the first mounting frame; By designing the above technical solution, starting the second moving motor causes the second screw to rotate, which in turn causes the second connecting rod to move under the action of the second slider.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Enables rapid switching of feed pipelines to ensure continuous dewatering of chemimechanical pulp in the dual bleaching tower system; 2. Facilitates online cleaning in case of blockage, reducing downtime; thoroughly removes accumulated slurry, preventing residue from affecting subsequent processes; 3. Two independent transfer screw press bodies are set up, which can be flexibly switched through the material distribution mechanism to ensure that the system can continue to operate when a single machine is maintained or cleaned, thereby improving the overall continuity of operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the rotating shaft and the spiral stirring blade in this invention.

[0016] Figure 3 This is a top view of the present invention.

[0017] Figure 4 This is the southwest isometric view of the present invention.

[0018] Figure 5 This is the southeast isometric view of the present invention.

[0019] Figure 6 This is a cross-sectional view of the material distribution mechanism in this invention.

[0020] Figure 7 yes Figure 6 Enlarged view of part A in the image.

[0021] Figure 8 This is a schematic diagram of the structure of the fixed semi-ring, the grid filter and the separation mechanism in this invention.

[0022] Figure 9 This is a structural diagram of the No. 2 moving mechanism, guide ring, guide rod, push plate, connecting pipe, No. 3 connecting rod, and No. 1 mounting frame in this invention.

[0023] Explanation of reference numerals in the attached figures: 1. Main body of the screw press; 2. Rotary shaft; 3. Spiral mixing blades; 4. Pressing pipe; 5. Feeding mechanism; 5-1. Feeding hopper No. 1; 5-2. Distributing pipe; 5-3. Distributing mechanism; 5-4. Distributing motor; 5-41. Connecting shaft; 5-42. Distributing plate; 5-43. Limiting arc plate; 5-44. Feeding hopper No. 2; 5-5. Dewatering mechanism; 6. Fixed semi-ring; 6-1. Grille filter; 6-2. Collection hopper; 6-3. Drain pipe; 6-4. Separation mechanism; 6-5. Mounting bracket No. 2; 6-51. Separation motor; 6-52. Separating screw 6-53, pushing mechanism 7, connecting rod 1 7-1, moving mechanism 1 7-2, moving motor 1 7-21, screw 1 7-22, slider 1 7-23, slide rail 1 7-24, connecting rod 2 7-3, moving mechanism 2 7-4, moving motor 2 7-41, screw 2 7-42, slider 2 7-43, slide rail 2 7-44, guide ring 7-5, guide rod 7-6, push plate 7-7, connecting pipe 7-8, connecting rod 3 7-9, mounting bracket 1 8. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The specific implementation method adopts the following technical solution: Example 1:

[0026] Please see Figure 1-5 This embodiment 1 includes a conveyor screw press body 1, a rotating shaft 2, and a spiral stirring blade 3; two conveyor screw press bodies 1 are arranged one in front of the other; the conveyor screw press has a rotating shaft 2 inside, the left end of the rotating shaft 2 is driven by a motor, the diameter of the rotating shaft 2 is inclined from left to right from small to large, and the spiral stirring blade 3 is fixed on the rotating shaft 2; two pressing pipes 4 are respectively connected to the right end of the conveyor screw press body 1; the pressing pipes 4 are inclined from left to right from low to high; It also includes: The feeding mechanism 5 is located on the upper left side of the two conveyor screw press bodies 1; Dehydration mechanism 6, which is connected to two conveyor screw press bodies 1; Pushing mechanism 7, which is connected to pressing tube 4; Mounting bracket 8 is located between the pushing mechanism 7 and the pressing tube 4. Example 2:

[0027] Please see Figure 5-7 Based on Embodiment 1, the feeding mechanism 5 includes: Feed pipe 5-1, and a feed hopper 5-2 is provided on the feed pipe 5-1; There are two distribution pipes 5-3, each connected to the bottom of the feed pipe 5-1 from front to back. The bottom of the distribution pipe 5-3 is inclined outward. The connection between the feed pipe 5-1 and the distribution pipe 5-3 is arc-shaped and equipped with a distribution mechanism 5-4. The distribution mechanism 5-4 includes: The material distribution motor 5-41 is fixed to the right side wall of the feed pipe 5-1 by a bracket. The material distribution motor 5-41 is connected to an external power supply. The specific model of the material distribution motor 5-41 is purchased and installed directly from the market according to the actual usage requirements. Connecting shaft 5-42 is screwed into feed pipe 5-1 via bearing seat, and connecting shaft 5-42 is connected to output shaft of feed motor 5-41 via coupling; Material dividing plate 5-43, there are two material dividing plates 5-43, and they are respectively fixed to the annular wall of the connecting shaft 5-42; Two limiting arc plates 5-44 are provided, and they are fixed on the upper end of the inner bottom plate of the material distribution pipe 5-3 respectively. The arc of the limiting arc plate 5-44 is set to be consistent with the arc of the connection between the feed pipe 5-1 and the material distribution pipe 5-3. There are two No. 2 feed hoppers 5-5, and they are respectively connected to the upper left side of the ring wall of the main body 1 of the conveyor screw press. Example 3:

[0028] Please see Figure 4-5 , Figure 8 Based on Example 1, the dehydration mechanism 6 includes: Fixed semi-rings 6-1, the number of which is several, and they are respectively located at the front and rear of the main body 1 of the conveyor screw press; The grid filter 6-2 consists of four grid filters, each with a semi-circular structure. The grid filters 6-2 are arranged in pairs, one above the other, inside the main body 1 of the conveyor screw press. Fixed half-rings 6-1 are fixed to both ends of the grid filters 6-2. The left and right edges of the grid filters 6-2 are fitted to the edges of the main body 1 of the conveyor screw press. There are two collection hoppers 6-3, which are respectively located below the lower grid filter 6-2. The bottom of the collection hopper 6-3 is provided with a drain pipe 6-4. Separation mechanism 6-5, there are four separation mechanisms 6-5, and each is connected to the fixed half-ring 6-1. Each separation mechanism 6-5 includes: Mounting bracket 6-51, there are two mounting brackets 6-51, which are respectively located in front of and behind the upper and lower fixed semi-rings 6-1. Mounting bracket 6-51 is arranged in a "C" shape. Two separate motors 6-52 are provided, and each is fixed to the inner bottom plate of the second mounting bracket 6-51 by bolts. The separate motors 6-52 are connected to an external power supply. The specific model of the separate motors 6-52 is purchased and installed directly from the market according to the actual usage requirements. There are four separating screws 6-53, which are threadedly connected to the front and rear ends of the fixed half-ring 6-1. The upper separating screw 6-53 is screwed to the second mounting bracket 6-51 through a bearing seat, and the lower end of the lower separating screw 6-53 is connected to the output shaft of the separating motor 6-52 through a coupling. The threads of the upper and lower separating screws 6-53 are arranged in opposite directions. Example 4:

[0029] Please see Figure 4-5 , Figure 9 Based on Embodiment 1, the pushing mechanism 7 includes: There are two No. 1 connecting rods 7-1, and they are fixed to the bottom of the pressing tube 4 respectively. There are two moving mechanisms 7-2, each connected to a connecting rod 7-1. Each moving mechanism 7-2 includes a moving motor 7-21, a screw 7-22, a slider 7-23, and a slide rail 7-24. The moving motor 7-21 is fixed on the mounting bracket 8 and connected to an external power source. The specific model of the moving motor 7-21 is purchased and installed directly from the market according to actual usage requirements. The output shaft of the moving motor 7-21 is connected to the screw 7-22 via a coupling. The screw 7-22 is threaded through the connecting rod 7-1. The bottom of the connecting rod 7-1 is bolted to the slider 7-23, and the bottom of the slider 7-23 is slidably connected to the slide rail 7-24, which is fixed to the mounting bracket 8. Second connecting rod 7-3, which is located between two pressing tubes 4; connecting tube 7-8 is movably sleeved on the second connecting rod 7-3; The second moving mechanism 7-4 is connected to the second connecting rod 7-3. The second moving mechanism 7-4 includes: a second moving motor 7-41, a second screw 7-42, a second slider 7-43, and a second slide rail 7-44. The second moving motor 7-41 is fixed to the right side wall of the first mounting bracket 8 and is connected to an external power source. The specific model of the second moving motor 7-41 is purchased and installed directly from the market according to actual usage requirements. The output shaft of the second moving motor 7-41 is connected to the second screw 7-42 via a coupling. The second screw 7-42 is threaded through the second connecting rod 7-3. The bottom of the second connecting rod 7-3 is bolted to the second slider 7-43, and the bottom of the second slider 7-43 is slidably equipped with the second slide rail 7-44, which is fixed to the first mounting bracket 8. Guide ring 7-5 is hinged to the second connecting rod 7-3; Guide rod 7-6 is movably inserted inside guide ring 7-5. Both ends of guide rod 7-6 are fixed to slide rail 7-44 and mounting bracket 8 by rods. Guide ring 7-5 is inclined from left to right from low to high. Push plate 7-7, there are two push plates 7-7, and they are respectively located between two pressing tubes 4; push plate 7-7 is hinged to guide ring 7-5 through connecting rod 3 7-9.

[0030] When using this invention, the chemimechanical slurry is fed from the first feed hopper 5-2 to the feed pipe 5-1; the distribution plate 5-43 blocks one of the distribution pipes 5-3, so that the chemimechanical slurry falls into the transfer screw press body 1 from only one distribution pipe 5-3; when the transfer screw press body 1 is running, the diameter of the rotating shaft 2 is inclined from left to right from small to large, so that the chemimechanical slurry is pressed, and the waste liquid flows out through the grid filter 6-2 into the collection hopper 6-3 and is discharged through the drain pipe 6-4; the dewatered chemimechanical slurry is pushed into the pressing pipe 4 and moved upward, and is gradually discharged into the next process. When the grid filter 6-2 is clogged and the dewatering efficiency is reduced, the feeding motor 5-41 is started, the connecting shaft 5-42 rotates, and the feeding plate 5-43 rotates, blocking the original feeding pipe 5-3 and opening the other feeding pipe 5-3, so that the feeding feeding pipe 5-3 is switched. At this time, another transfer screw press body 1 is used to press and dewater the chemical pulp, so that the operation is continuous. For the stopped conveyor screw press body 1, start the corresponding separation motor 6-52 to rotate the upper and lower separation screws 6-53. The threads of the upper and lower separation screws 6-53 are set in opposite directions, which drives the upper and lower fixed half rings 6-1 to separate, so that the upper and lower grid screens 6-2 can be separated, making it easier to clean the grid screens 6-2. Start the first moving motor 7-21, and the first screw 7-22 rotates. Under the action of the first slider 7-23, the pressing tube 4 on this side moves towards the push plate 7-7. Start the second moving motor 7-41, and the second screw 7-42 rotates. Under the action of the second slider 7-43, the second connecting rod 7-3 moves, which drives the guide ring 7-5 to move on the guide rod 7-6, so that the push plate 7-7 moves in the pressing tube 4 according to the trajectory of the guide rod 7-6. The push plate 7-7 presses out the dewatered chemical pulp accumulated in the pressing tube 4.

[0031] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the cooperation of the feeding motor 5-41, the connecting shaft 5-42 and the feeding plate 5-43, the rapid switching of the feed pipe 5-1 is realized, ensuring the continuous dewatering operation of the chemimechanical pulp in the dual bleaching tower system; 2. A separate motor 6-52 drives upper and lower separation screws 6-53 with opposite threads, so that the fixed half ring 6-1 and the grid filter screen 6-2 can be quickly separated, which facilitates online cleaning when clogged and reduces downtime. 3. The pressing tube 4 is moved by the first moving motor 7-21, the first screw 7-22 and the first slider 7-23. Combined with the second moving motor 7-41, the second screw 7-42 and the push plate 7-7, the accumulated slurry is completely removed to avoid residue affecting the subsequent process. 4. Two independent transfer screw press bodies 1 are set up, which can be flexibly switched through the material distribution mechanism 5-4 to ensure that the system can continue to operate when a single machine is maintained or cleaned, thereby improving the overall continuity of operation.

[0032] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A chemimechanical pulp transfer screw press suitable for double bleaching towers, comprising a transfer screw press body (1), a rotating shaft (2), and a spiral stirring blade (3); two transfer screw press bodies (1) are arranged one in front of the other; a rotating shaft (2) is provided inside the transfer screw press, the left end of the rotating shaft (2) is driven by a motor, the diameter of the rotating shaft (2) is inclined from left to right from small to large, and a spiral stirring blade (3) is fixed on the rotating shaft (2); two pressing pipes (4) are respectively connected to the right end of the transfer screw press body (1); the pressing pipes (4) are inclined from left to right from low to high; Its features are, It also includes: The feeding mechanism (5) is located on the upper left side of the two conveyor screw press bodies (1); Dehydration mechanism (6), which is connected to two conveyor screw press bodies (1); Pushing mechanism (7), which is connected to pressing tube (4); Mounting bracket (8) is located between the pushing mechanism (7) and the pressing tube (4).

2. The chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 1, characterized in that: The feeding mechanism (5) includes: Feed pipe (5-1), and a feed hopper (5-2) is provided on the feed pipe (5-1); There are two material distribution pipes (5-3), which are connected to the bottom of the feed pipe (5-1) from front to back respectively. The bottom of the material distribution pipe (5-3) is inclined outward. The connection between the feed pipe (5-1) and the material distribution pipe (5-3) is an arc-shaped structure and is equipped with a material distribution mechanism (5-4). The number of No. 2 feed hoppers (5-5) is two, and they are respectively connected to the upper left side of the ring wall of the main body (1) of the transfer screw press.

3. A chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 2, characterized in that: The material distribution mechanism (5-4) includes: The material distribution motor (5-41) is fixed to the right side wall of the feed pipe (5-1) by a bracket and is connected to an external power source. The connecting shaft (5-42) is screwed into the feed pipe (5-1) through a bearing seat, and the connecting shaft (5-42) is connected to the output shaft of the feed motor (5-41) through a coupling; There are two material distribution plates (5-43), which are respectively fixed on the annular wall of the connecting shaft (5-42).

4. A chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 3, characterized in that: Two limiting arc plates (5-44) are fixed on the upper end of the inner bottom plate of the material distribution pipe (5-3), and the curvature of the limiting arc plate (5-44) is set to be consistent with the curvature of the connection between the feed pipe (5-1) and the material distribution pipe (5-3).

5. A chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 1, characterized in that: The dehydration mechanism (6) includes: Fixed half-rings (6-1), the number of fixed half-rings (6-1) is several, and they are respectively set at the front and rear of the conveyor screw press body (1); The grid filter (6-2) consists of four grid filters (6-2), each of which is semi-circular in structure. The grid filters (6-2) are arranged in pairs, one above the other, inside the main body (1) of the conveyor screw press. Fixed half rings (6-1) are fixed at both ends of the grid filters (6-2). The left and right edges of the grid filters (6-2) are fitted to the edges of the main body (1) of the conveyor screw press. There are two collection hoppers (6-3), which are respectively located below the lower grid filter (6-2). The bottom of the collection hopper (6-3) is provided with a drain pipe (6-4). The separation mechanism (6-5) consists of four parts, each of which is connected to a fixed half-ring (6-1).

6. A chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 5, characterized in that: The separation mechanisms (6-5) all include: The second mounting bracket (6-51) consists of two brackets, which are respectively located at the front and rear of the upper and lower fixed semi-rings (6-1). The second mounting bracket (6-51) is arranged in a "C" shape. Two separate motors (6-52) are provided, and each is fixed to the inner bottom plate of the second mounting bracket (6-51); the separate motors (6-52) are connected to an external power source. There are four separating screws (6-53), which are threadedly connected to the front and rear ends of the fixed half ring (6-1). The upper separating screw (6-53) is screwed to the second mounting bracket (6-51) through a bearing seat, and the lower end of the lower separating screw (6-53) is connected to the output shaft of the separating motor (6-52) through a coupling. The threads of the upper and lower separating screws (6-53) are arranged in opposite directions.

7. A chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 1, characterized in that: The push mechanism (7) includes: There are two No. 1 connecting rods (7-1), and they are fixed to the bottom of the pressing tube (4) respectively. There are two No. 1 moving mechanisms (7-2), and each of them is connected to a No. 1 connecting rod (7-1). The second connecting rod (7-3) is located between the two pressing tubes (4); a connecting tube (7-8) is movably sleeved on the second connecting rod (7-3). The second moving mechanism (7-4) is connected to the second connecting rod (7-3); the guide ring (7-5) is hinged to the second connecting rod (7-3); The guide rod (7-6) is movably inserted inside the guide ring (7-5). The two ends of the guide rod (7-6) are fixed to the second slide rail (7-44) and the first mounting bracket (8) by rods. The guide ring (7-5) is inclined from left to right from low to high. Push plate (7-7), there are two push plates (7-7), and they are respectively located between two pressing tubes (4); the push plate (7-7) is hinged to the guide ring (7-5) through the third connecting rod (7-9).

8. A chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 7, characterized in that: The first moving mechanism (7-2) includes: a first moving motor (7-21), a first screw (7-22), a first slider (7-23), and a first slide rail (7-24); the first moving motor (7-21) is fixed on the first mounting bracket (8) and is connected to an external power source; the output shaft of the first moving motor (7-21) is connected to the first screw (7-22) via a coupling; the first screw (7-22) is threaded through the first connecting rod (7-1); the bottom of the first connecting rod (7-1) is fixed with a first slider (7-23), and the bottom of the first slider (7-23) is slidably provided with a first slide rail (7-24), which is fixed to the first mounting bracket (8).

9. A chemimechanical pulp transfer screw press suitable for dual bleaching towers according to claim 7, characterized in that: The second moving mechanism (7-4) includes: a second moving motor (7-41), a second screw (7-42), a second slider (7-43), and a second slide rail (7-44); the second moving motor (7-41) is fixed on the right side wall of the first mounting frame (8), and the second moving motor (7-41) is connected to an external power source; the output shaft of the second moving motor (7-41) is connected to the second screw (7-42) through a coupling; the second screw (7-42) is threaded through the second connecting rod (7-3); the second slider (7-43) is fixed at the bottom of the second connecting rod (7-3), and the second slide rail (7-44) is slidably provided at the bottom of the second slider (7-43), and the second slide rail (7-44) is fixed to the first mounting frame (8).

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