Defibering, screening and deslagging device for fiber pulp production

Abstract

The utility model discloses a defibering, screening and deslagging device for fiber slurry production, which relates to the technical field of fiber slurry production and comprises a stirring tank, a feeding hopper at the top of the stirring tank, a first rotating shaft arranged in the stirring tank, a stirring mechanism arranged on the first rotating shaft, a second rotating shaft arranged in the middle of the stirring tank and a defibering stirring rod arranged on the second rotating shaft. A first conveying pipe arranged at the lower end of the material storage box body extends to be connected with the input end of a first liquid pump, one end of a third conveying pipe connected with the output end of the first liquid pump extends to the position above the slag removal box body, multiple layers of sieve plates are arranged in the slag removal box body in parallel, and a plurality of sieve holes are formed in the sieve plates. The utility model provides a defibering, screening and deslagging device for producing fiber pulp, which can remove impurities in the pulp, fully defibering fibers and reducing the fiber agglomeration phenomenon through the synergistic effect of a multi-layer stirring mechanism and a defibering stirring rod, and efficiently remove the impurities in the pulp through the combined design of a multi-layer sieve plate and a steel wire brush.

Description

A descaling and screening device for fiber pulp production Technical Field

[0001] This utility model relates to the field of fiber pulp production technology, specifically to a slag removal and screening device for fiber pulp production. Background Technology

[0002] In the production of fiber pulp, fiber loosening, screening, and slag removal are key steps. Traditional fiber pulp production equipment typically uses single mixing or screening devices, but these devices have the following problems when processing fiber pulp:

[0003] 1. During the process of fiber pulping and mixing, there is a technical problem of insufficient fiber dispersing. Existing dispersing or mixing devices all use clockwise or counterclockwise mixing to mix and disperse the pulp, but lack a mixing effect in the vertical direction during the mixing process.

[0004] 2. The screening and slag removal efficiency of fiber pulp is low. The screening equipment cannot efficiently remove impurities in the pulp, resulting in impurity residues that affect the purity of the fiber pulp. In addition, the slag generated during the screening and slag removal process is not collected and recycled in a centralized manner.

[0005] 3. Traditional equipment usually requires multiple independent devices to work together, resulting in large equipment footprint, high energy consumption, and complex maintenance. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a fiber pulp production delamination, screening, and slag removal device. This device can fully delaminate fibers, preventing fiber agglomeration, and efficiently remove impurities from the pulp, avoiding impurity residue. The synergistic effect of the multi-layer stirring mechanism and the delamination stirring rod fully delaminates fibers and reduces fiber agglomeration. Through the combined design of multi-layer sieve plates and wire brushes, impurities in the pulp are efficiently removed, improving the purity of the fiber pulp. The integrated design combines screening and slag removal functions into one device, reducing equipment footprint and energy consumption, and lowering maintenance costs.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A slag removal and screening device for fiber pulp production includes a mixing tank with two symmetrically arranged feed hoppers at the top. A first rotating shaft is vertically rotatable inside the mixing tank, and multiple stirring mechanisms for stirring and slag removal of the fiber pulp are arranged parallel to the first rotating shaft. A second rotating shaft is horizontally rotatable in the middle of the mixing tank, and multiple slag removal and stirring rods are arranged circumferentially around the second rotating shaft. A lower guide hopper with a top-large and bottom-small structure is connected to the bottom of the mixing tank. Multiple discharge pipes at the bottom of the lower guide hopper extend to a storage tank. A first conveying pipe at the bottom of the storage tank extends to the input end of a first liquid pump. A third conveying pipe connected to the output end of the first liquid pump extends to the top of the slag removal tank. Multiple conveying branch pipes are arranged at the end of the third conveying pipe, and the lower ends of the conveying branch pipes vertically pass through the top of the slag removal tank. Multiple sieve plates are arranged parallel to each other inside the slag removal tank, and multiple sieve holes are provided on the sieve plates.

[0009] As a further improvement to the above scheme, the end of the first rotating shaft that extends out of the mixing tank is connected to the output shaft of the first motor.

[0010] As a further improvement to the above solution, the stirring mechanism includes a retaining ring, which is installed on the first rotating shaft by connecting bolts. The connecting bolts are in the form of a ring buckle. Multiple stirring rods are arranged around the circumference of the retaining ring, and stirring blades are provided on the stirring rods.

[0011] As a further improvement to the above scheme, one end of the second rotating shaft that passes through the side wall of the mixing tank is connected to the output shaft of the second motor.

[0012] As a further improvement to the above solution, a first control valve is provided on the discharge pipe for controlling the opening and closing of the discharge pipe.

[0013] As a further improvement to the above solution, a second control valve and a temperature sensor are installed on the first delivery pipe.

[0014] As a further improvement to the above scheme, a collar is provided on the third rotating shaft, and the steel wire brush and slag discharge plate on the collar are located above the screen plate, and a slag discharge port is provided on the side of the screen plate.

[0015] As a further improvement to the above solution, an outer shell is provided on the side of the slag discharge port, and a spiral conveying shaft is horizontally rotatably arranged below the outer shell. A slag discharge opening is provided at the lower part of the end of the spiral conveying shaft away from the slag removal box, and a slag storage box is provided directly below the slag discharge opening. One end of the spiral conveying shaft is connected to the output shaft end of a third motor.

[0016] As a further improvement to the above solution, the lower end of the slag removal box is connected to the input end of the second liquid pump on the side away from the screw conveyor shaft, and the output end of the second liquid pump is connected to the second conveying pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] It can fully loosen fibers and avoid fiber agglomeration. It can efficiently remove impurities in the slurry and avoid impurity residue. The synergistic effect of the multi-layer stirring mechanism and loosening stirring rod can fully loosen fibers and reduce fiber agglomeration. Through the combination design of multi-layer screen plates and steel wire brushes, it can efficiently remove impurities in the slurry and improve the purity of fiber slurry. Through integrated design, screening and slag removal functions are integrated into one device, reducing equipment footprint and energy consumption, and reducing maintenance costs. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the main structure of this utility model.

[0020] Figure 2 is a structural schematic diagram of the stirring rod position of this utility model.

[0021] Figure 3 is a structural schematic diagram of the slag removal box of this utility model.

[0022] Figure 4 is a schematic diagram of the structure at the location of the wire brush of this utility model.

[0023] Figure 5 is a schematic diagram of the cross-sectional structure at point AA in Figure 1.

[0024] Figure 6 is a top view of the structure at the position of the retaining ring in Figure 5.

[0025] The text labels in the diagram represent: 1. Mixing tank; 2. Feed hopper; 3. First motor; 4. Bearing; 5. Mixing mechanism; 6. First rotating shaft; 7. Second motor; 8. Second rotating shaft; 9. Dispersing and mixing rod; 10. Lower guide hopper; 11. First control valve; 12. Discharge pipe; 13. Storage tank; 14. Second control valve; 15. Temperature sensor; 16. First conveying pipe; 17. First liquid pump; 18. Second conveying pipe; 19. 20. Second liquid pump; 21. Third conveying pipe; 22. Conveying branch pipe; 23. Steel wire brush; 24. Screen plate; 25. Screen hole; 26. Collar; 27. Slag discharge plate; 28. Outer shell; 29. ​​Slag discharge port; 30. Slag outlet; 31. Third motor; 32. Slag storage box; 33. Slag removal box; 34. Third rotating shaft; 501. Clamping ring; 502. Connecting bolt; 503. Stirring rod; 504. Stirring blade. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0027] As shown in Figures 1-6, the specific solution of this embodiment is as follows: a delamination, screening, and slag removal device for fiber pulp production, including a mixing tank 1, two feed hoppers 2 symmetrically arranged at the top of the mixing tank 1, a first rotating shaft 6 vertically rotating inside the mixing tank 1, a plurality of stirring mechanisms 5 for stirring and delaminating fiber pulp arranged parallel to the first rotating shaft 6, a second rotating shaft 8 horizontally rotating in the middle of the mixing tank 1, a plurality of delamination stirring rods 9 arranged circumferentially around the second rotating shaft 8, and a lower guide hopper 1 with a structure that is larger at the top and smaller at the bottom connected to the bottom of the mixing tank 1. 0. Multiple discharge pipes 12 at the bottom of the lower guide hopper 10 extend to the storage box 13. The first conveying pipe 16 at the lower end of the storage box 13 extends to the input end of the first liquid pump 17. The output end of the first liquid pump 17 is connected to the third conveying pipe 20, which extends to the top of the slag removal box 33. Multiple conveying branch pipes 21 are provided at the end of the third conveying pipe 20. The lower end of the conveying branch pipe 21 passes vertically through the top of the slag removal box 33. Multiple screen plates 23 are arranged in parallel inside the slag removal box 33. Multiple screen holes 24 are provided on the screen plates 23.

[0028] More specifically, in the feeding and initial mixing and dispersing process, the fiber raw material enters the mixing tank 1 through two feed hoppers 2. The first motor 3 drives the first rotating shaft 6 to rotate, which in turn drives the mixing mechanism 5 to mix and disperse the fiber slurry. The mixing mechanism 5 includes a retaining ring 501, a connecting bolt 502, a mixing rod 503, and a mixing plate 504, which are fixed on the first rotating shaft 6 by a ring-lock structure to ensure that the mixing rod 503 and the mixing plate 504 can disperse the fiber evenly. A bearing 4 is provided between the first rotating shaft 6 and the mixing tank 1 to facilitate the rotation of the first rotating shaft 6.

[0029] Deep dissolution and material guiding: the second motor 7 drives the second rotating shaft 8 to rotate, which drives the dissolution and stirring rod 9 to deeply dissolve the fiber slurry. The lower guide hopper 10 at the bottom of the mixing tank 1 has a structure that is larger at the top and smaller at the bottom, ensuring that the slurry flows evenly to the discharge pipe 12.

[0030] As shown in Figures 1 and 2, in a preferred embodiment of the above-described method, one end of the first rotating shaft 6 extending out of the mixing tank 1 is connected to the output shaft end of the first motor 3.

[0031] More specifically, the first motor 3 drives the first rotating shaft 6 to rotate, providing the basic conditions for stirring and dispersing the fiber slurry.

[0032] As shown in Figure 1, in a preferred embodiment of the above, the stirring mechanism 5 includes a retaining ring 501, which is mounted on the first rotating shaft 6 by connecting bolts 502. The connecting bolts 502 are in the shape of a ring. Multiple stirring rods 503 are arranged around the circumference of the retaining ring 501, and stirring blades 504 are provided on the stirring rods 503.

[0033] As shown in Figure 1, in a preferred embodiment of the above, one end of the second rotating shaft 8 that passes through the side wall of the mixing tank 1 is connected to the output shaft end of the second motor 7.

[0034] More specifically, the second motor 7 and the second rotating shaft 8 are driven to rotate, which in turn drives the dispersing and stirring rod 9 to deeply dissipate the fiber slurry.

[0035] As shown in Figure 1, in a preferred embodiment of the above, a first control valve 11 for controlling the opening and closing of the discharge pipe 12 is provided on the discharge pipe 12.

[0036] More specifically, the first control valve 11 used to control the on / off state of the discharge pipe 12 is a solenoid valve, which is electrically connected to the central processing unit and the control switch.

[0037] As shown in Figure 1, in a preferred embodiment of the above, a second control valve 14 and a temperature sensor 15 are provided on the first delivery pipe 16.

[0038] More specifically, a second control valve 14 and a temperature sensor 15 are installed on the first delivery pipe 16 to monitor the slurry temperature and ensure it is within the range of 20-40℃.

[0039] The first liquid pump 17 and the second liquid pump 19 are high-pressure centrifugal pumps with a flow rate set to 10-20 cubic meters per hour.

[0040] As shown in Figures 1, 3, and 4, in a preferred embodiment of the above, a collar 25 is provided on the third rotating shaft 34, and a wire brush 22 and a slag discharge plate 26 provided on the collar 25 are located above the screen plate 23, and a slag discharge port 28 is provided on the side of the screen plate 23.

[0041] More specifically, the diameter of the sieve holes 24 on the sieve plate 23 decreases layer by layer. From top to bottom, the diameters of the sieve holes 24 are 3mm, 2mm, 1.5mm, 1mm, and 0.5mm, respectively, for layer-by-layer screening.

[0042] As shown in Figure 1, in a preferred embodiment of the above, a shell 27 is provided on the side of the slag discharge port 28, and a spiral conveying shaft 29 is horizontally rotatably arranged below the shell 27. A slag discharge opening 30 is provided at the lower part of the end of the spiral conveying shaft 29 away from the slag removal box 33, and a slag storage box 32 is provided directly below the slag discharge opening 30. One end of the spiral conveying shaft 29 is connected to the output shaft end of the third motor 31.

[0043] More specifically, a collar 25 is installed on the third rotating shaft 34, and a wire brush 22 and a slag discharge plate 26 are fixed on the collar 25. The wire brush 22 is used to clean the screen holes 24, and the slag discharge plate 26 is used to guide the discharge of impurities. The slag discharge port 28 is connected to the outer shell 27, and a screw conveyor shaft 29 is set inside the outer shell 27. The screw conveyor shaft 29 is driven by the third motor 31 and rotates at a speed of 10-20 revolutions per minute. The slag storage box 32 is located below the screw conveyor shaft 29 and is used to collect impurities.

[0044] As shown in Figure 1, in a preferred embodiment of the above, the lower end of the slag removal box 33, away from the side of the screw conveyor shaft 29, is connected to the input end of the second liquid pump 19, and the output end of the second liquid pump 19 is connected to the second conveying pipe 18.

[0045] More specifically, the output end of the second liquid pump 19 is connected to the second delivery pipe 18, which is used to guide the output of the processed fiber raw material slurry.

[0046] The specific working principle of this utility model is as follows:

[0047] Fiber pulp enters the mixing tank 1 through two feed hoppers 2. A first motor 3 drives a first rotating shaft 6 to rotate, which in turn drives a mixing mechanism 5 to perform preliminary mixing and dispersing of the fiber pulp. The mixing mechanism 5 includes a retaining ring 501, a connecting bolt 502, a mixing rod 503, and a mixing blade 504, which are fixed to the first rotating shaft 6 by a ring-locking structure to ensure that the mixing rod 503 and the mixing blade 504 can disperse the fiber evenly. A second motor 7 drives a second rotating shaft 8 to rotate, which in turn drives a dispersing mixing rod 9 to perform deep dispersing of the fiber pulp in the vertical direction, thereby forming an irregular turbulent flow in the mixing tank 1, which promotes more uniform dispersing of the fiber pulp. The lower guide hopper 10 at the bottom of the mixing tank 1 has a structure that is larger at the top and smaller at the bottom, ensuring that the pulp flows evenly to the discharge pipe 12. The discharge pipe 12 passes through the first... Control valve 11 controls the discharge of slurry. The slurry enters the first liquid pump 17 through the first conveying pipe 16. The first liquid pump 17 conveys the slurry to the third conveying pipe 20. It is evenly distributed above the slag removal box 33 through multiple conveying branches 21. The slurry is screened through the screen plate 23. The screen holes 24 on the screen plate 23 ensure that the fibers pass through and the impurities are intercepted. The wire brush 22 and the slag discharge plate 26 regularly clean the impurities on the screen plate 23 to prevent the screen holes 24 from clogging. The impurities enter the outer shell 27 through the slag discharge port 28. The screw conveyor shaft 29 conveys the impurities to the slag storage box 32. The screened fiber slurry is conveyed to the storage box 13 through the second liquid pump 19 to complete the entire production process. The temperature sensor 15 monitors the slurry temperature in real time to ensure the stability of the production process.

[0048] It should be noted that, in this document, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A deflaker and screen de-stoner device for fiber slurry production, characterized by, The mixing tank (1) includes a feeding hopper (2) at the top of the mixing tank (1), a first rotating shaft (6) rotatably installed inside the mixing tank (1), a stirring mechanism (5) parallel to the first rotating shaft (6), a second rotating shaft (8) in the middle of the mixing tank (1), a dispersing and stirring rod (9) on the second rotating shaft (8), a lower guide hopper (10) connected to the bottom of the mixing tank (1), and a discharge pipe (12) at the bottom of the lower guide hopper (10) extending to the storage box (13). 13) The first conveying pipe (16) at the lower end extends to the input end of the first liquid pump (17). The third conveying pipe (20) connected to the output end of the first liquid pump (17) extends to the top of the slag removal box (33). Multiple conveying branch pipes (21) are set at the end of the third conveying pipe (20). The lower end of the conveying branch pipe (21) passes vertically through the top of the slag removal box (33). Multiple layers of screen plates (23) are arranged in parallel inside the slag removal box (33). Multiple screen holes (24) are set on the screen plates (23).

2. The slag removal and screening device for fiber pulp production according to claim 1, characterized in that, The end of the first rotating shaft (6) that extends out of the mixing tank (1) is connected to the output shaft of the first motor (3).

3. A deflaker and cleaner device for fiber slurry production according to claim 2, characterized in that, The stirring mechanism (5) includes a retaining ring (501), which is installed on the first rotating shaft (6) by connecting bolts (502). The connecting bolts (502) are in the shape of a ring. Multiple stirring rods (503) are arranged around the circumference of the retaining ring (501), and stirring blades (504) are arranged on the stirring rods (503).

4. The slag removal and screening device for fiber pulp production according to claim 3, characterized in that, The second rotating shaft (8) passes through one end of the side wall of the mixing tank (1) and is connected to the output shaft end of the second motor (7).

5. A deflaker and cleaner device for fiber slurry production according to claim 4, characterized in that, A first control valve (11) is provided on the discharge pipe (12) for controlling the opening and closing of the discharge pipe (12).

6. A deflaker and cleaner device for fiber slurry production according to claim 5, characterized in that, A second control valve (14) and a temperature sensor (15) are provided on the first delivery pipe (16).

7. A slag removal and screening device for fiber pulp production according to claim 6, characterized in that, The slag removal box (33) is equipped with a third rotating shaft (34), a collar (25) is provided on the third rotating shaft (34), a wire brush (22) and a slag discharge plate (26) are provided on the collar (25) and are located above the screen plate (23), and a slag discharge port (28) is provided on the side of the screen plate (23).

8. A slag removal and screening device for fiber pulp production according to claim 7, characterized in that, The slag discharge port (28) is provided with an outer shell (27) on the side, and a spiral conveying shaft (29) is horizontally rotatably arranged below the outer shell (27). A slag discharge opening (30) is provided at the lower part of the end of the spiral conveying shaft (29) away from the slag removal box (33). A slag storage box (32) is provided directly below the slag discharge opening (30). One end of the spiral conveying shaft (29) is connected to the output shaft end of the third motor (31).

9. A slag removal and screening device for fiber pulp production according to claim 8, characterized in that, The lower end of the slag removal box (33) is connected to the input end of the second liquid pump (19) away from the spiral conveyor shaft (29), and the output end of the second liquid pump (19) is connected to the second conveying pipe (18).

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