Paper pulp slag removal equipment for paper product manufacturing

Abstract

The invention discloses paper pulp slag removal equipment for paper product manufacturing, and belongs to the technical field of paper pulp filtration. The top of the filter box is communicated with a pulp conveying pipe for conveying paper pulp, a fixed frame is fixed in the filter box, a filter screen for filtering impurities is embedded in the bottom of the fixed frame, a scraping plate is slidably arranged in the fixed frame, and a translation assembly for translating the scraping plate is arranged in the filter box; the scraping plate is translated through the translation assembly, the scraping plate cleans the impurities on the filter screen and pushes the impurities out of the filter box, the situation that the impurities are flushed by flowing paper pulp to block the filter screen again is avoided, meanwhile, the paper pulp with the impurities removed is pressurized and guided into the fine selection box, and centrifugal force, centripetal buoyancy, fluid drag force and the like borne by the paper pulp are different. Under the action of centrifugal sedimentation, most of long fibers are discharged through a bottom flow opening of the concentration box, and most of short fibers are discharged through a first discharging pipe, so that the separation and classification purposes are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pulp filtration, and particularly to a pulp slag removal device for paper product manufacturing. Background Art

[0002] Pulp is a fibrous substance made from plant fibers by different processing methods. It can be divided into mechanical pulp, chemical pulp, and chemi-mechanical pulp according to the processing method; it can also be divided into wood pulp, straw pulp, hemp pulp, reed pulp, sugarcane pulp, bamboo pulp, rag pulp, etc. according to the fiber raw materials used. It can also be divided into refined pulp, bleached pulp, unbleached pulp, high-yield pulp, semi-chemical pulp, etc. according to different purities. Generally, it is mostly used for manufacturing paper and paperboard. In addition to being used for manufacturing special papers, refined pulp is also often used as a raw material for manufacturing cellulose derivatives such as cellulose esters and cellulose ethers. It is also used in fields such as artificial fibers, plastics, coatings, films, and gunpowder.

[0003] In the prior art, the Chinese utility model content with the publication number: CN219908381U discloses a pulp slag removal device for paper product manufacturing, including: a pulp tank, a terminal inlet pipe connected to the top of the pulp tank, the terminal inlet pipe is connected to a pulp conveying pipe, an anti-blocking slag filtering device and a rotating slag removal device are installed on the inner and outer walls of the pulp tank, and a pulp outlet pipe connected to the lower end of the pulp tank; the anti-blocking slag filtering device can remove impurities with larger volume and mass in the pulp, and the anti-blocking slag filtering device can ensure that it is not blocked, thereby ensuring the continuity of the operation of the pulp slag removal device for paper product manufacturing; through the rotating slag removal device, impurities with smaller volume can be collected, and at the same time, some pulp residues can be broken, so that they exist in the pulp in a qualified form. The pulp slag removal device for paper product manufacturing can effectively remove the pulp residues in the pulp through two-stage slag removal treatment of the pulp, thereby making the pulp purer, and further ensuring the excellent quality of the manufactured paper products.

[0004] In the above technical solution, the large-particle device on the filter screen is cleared by the anti-blocking slag filtering impurities to prevent blockage, and at the same time, the rotating screen removes small-particle impurities again. Since the removed impurities still remain in the pulp tank, there is a risk of blocking the filter screen again and mixing into the pulp. At the same time, this device cannot screen the long and short fiber strips in the pulp. Summary of the Invention

[0005] The purpose of the present invention is to provide a pulp slag removal device for paper product manufacturing, which removes iron filings impurities in the pulp through a magnetic attraction plate, and then filters and removes impurities from the pulp through a filter screen, and then pressurizes the pulp and introduces it into a selection box, and uses the pulp to accelerate centrifugation in the selection box to stratify long fibers and short fibers, and discharge them from the top and bottom of the selection box respectively to obtain pulps with different fiber lengths, so as to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A pulp slag removal device for paper product manufacturing, comprising:

[0007] A filtration box and a selection box;

[0008] A slurry conveying pipe for conveying pulp is connected to the top of the filtration box. A fixing frame is fixed inside the filtration box. A filter screen for filtering impurities is embedded at the bottom of the fixing frame. A scraper is slidably arranged inside the fixing frame. A translation component for translating the scraper is arranged inside the filtration box to gather impurities;

[0009] A plurality of magnetic attraction plates are further arranged inside the filtration box to remove iron filings in the pulp;

[0010] A first box body is fixed on the outside of the selection box. A plurality of feed ports are opened on the side wall of the selection box. A conveying pipe is connected between the bottom of the first box body and the filtration box. A first discharge pipe is connected to the top of the selection box. A second box body is fixed at the lower end of the outside of the selection box. A discharge port communicating with the second box body is opened on the side wall of the selection box. A second discharge pipe is connected to the second box body.

[0011] Preferably, the translation component includes a translation screw rod rotatably mounted on the inner wall of the fixing frame through a bearing. The translation screw rod is movably connected to the scraper through a threaded sleeve. A driving motor is fixed on the outside of the filtration box. The output shaft of the driving motor penetrates into the inner cavity of the fixing frame and is fixed to one end of the translation screw rod.

[0012] Preferably, a support column is fixed at the bottom of the magnetic attraction plate. An installation groove is opened on one side of the filtration box. One end of the support column is fixed with an installation seat, and the installation seat is installed outside the installation groove.

[0013] Preferably, a diversion plate is fixed inside the filtration box. A material discharging hole is opened on the diversion plate, and the material discharging hole is located above the magnetic attraction plate.

[0014] Preferably, a sliding groove is opened in the inner cavity of the fixing frame. A sliding block is slidably connected to the inner cavity of the sliding groove. The opposite sides of the sliding block penetrate through the sliding groove and are fixed to the outside of the scraper.

[0015] Preferably, a limiting hole is opened on one side of the inner cavity of the filtration box. The end of the support column away from the installation seat extends into the limiting hole.

[0016] Preferably, a delivery pump is installed on the delivery pipe, and the delivery pump is fixed on the top of the selection box.

[0017] Preferably, the top of the inner cavity of the selection box is arranged in an inverted funnel shape, the feeding port penetrates through the side wall of the selection box obliquely, and the feeding port is located above the discharging port.

[0018] Preferably, one side of the fixed frame penetrates to the outside of the filtering box, and the filter net is located inside the filtering box.

[0019] Preferably, a support frame is fixed at the bottom of the filtering box, the support frame is fixed on the top of the selection box, and control valves are installed on both the first discharge pipe and the second discharge pipe.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In the present invention, the scraper is translated through the translation assembly, so that the impurities on the filter net are cleaned by the scraper and pushed out of the filtering box, avoiding being washed by the flowing pulp and blocking the filter net again. At the same time, the pulp after removing impurities is pressurized and introduced into the selection box, and it is affected by different forces such as centrifugal force, centripetal buoyancy, and fluid drag force. By the action of centrifugal sedimentation, most of the long fibers are discharged through the bottom flow port of the selection box, while most of the short fibers are discharged through the first discharge pipe, so as to achieve the purpose of separation and classification.

[0022] 2. In the present invention, a separation plate is arranged above the magnetic attraction plate, which is convenient for shunting the pulp conveyed from the pulp conveying pipe, avoiding too large impact when the pulp directly falls, washing away the iron filings adsorbed on the magnetic attraction plate, dispersing the impact force of the pulp through the material discharging holes, and at the same time facilitating the magnetic attraction plate to adsorb the iron filings in the pulp. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is a three-dimensional sectional structural schematic diagram of the filtering box of the present invention;

[0025] Figure 3 is a three-dimensional structural schematic diagram of the support column and the magnetic attraction plate of the present invention;

[0026] Figure 4 is a three-dimensional structural schematic diagram of the fixed frame and the translation assembly of the present invention;

[0027] Figure 5 is a three-dimensional sectional structural schematic diagram of the selection box of the present invention;

[0028] Figure 6 is a three-dimensional sectional structural schematic diagram of the top view of the selection box of the present invention.

[0029] Reference numerals in the figure: 1, filter box; 2, selection box; 3, pulp delivery pipe; 4, fixed frame; 5, filter screen; 6, scraper; 7, translation assembly; 71, translation screw; 72, drive motor; 8, magnetic attraction plate; 9, first box body; 10, feed inlet; 11, delivery pipe; 12, first discharge pipe; 13, second box body; 14, discharge outlet; 15, second discharge pipe; 16, support column; 17, mounting seat; 18, flow dividing plate; 19, blanking hole; 20, chute; 21, slider; 22, limiting hole; 23, delivery pump; 24, support frame. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] The present invention provides a Figures 1 to 6 shown pulp slag removal device for paper product manufacturing, including:

[0032] A filter box 1 and a selection box 2;

[0033] A pulp delivery pipe 3 for delivering pulp is connected to the top of the filter box 1. A fixed frame 4 is fixed inside the filter box 1. A filter screen 5 for filtering impurities is embedded at the bottom of the fixed frame 4. A scraper 6 is slidably arranged in the fixed frame 4. A translation assembly 7 for translating the scraper 6 is arranged in the filter box 1 to aggregate impurities;

[0034] A plurality of groups of magnetic attraction plates 8 are further arranged in the inner cavity of the filter box 1 for removing iron filings in the pulp;

[0035] A first box body 9 is fixed on the outside of the selection box 2. A plurality of groups of feed inlets 10 are opened on the side wall of the selection box 2. A delivery pipe 11 connecting the first box body 9 and the bottom of the filter box 1. A first discharge pipe 12 is connected to the top of the selection box 2. A second box body 13 is fixed at the lower end outside the selection box 2. A discharge outlet 14 communicating with the second box body 13 is opened on the side wall of the selection box 2. A second discharge pipe 15 is connected to the second box body 13;

[0036] The scraper 6 is translated through the translation assembly 7, so that the impurities on the filter screen 5 are cleared by the scraper 6 and pushed out of the filter box 1, avoiding being washed again by the flowing pulp and blocking the filter screen 5 again. At the same time, after the impurities are removed, the pulp is pressurized and introduced into the selection box 2. It is affected by different centrifugal forces, centripetal buoyancy forces, fluid drag forces, etc. Under the action of centrifugal sedimentation, most of the long fibers are discharged from the bottom flow port of the selection box 2, while most of the short fibers are discharged from the first discharge pipe 12, so as to achieve the purpose of separation and grading.

[0037] Among them, as Figure 4 shown:

[0038] The translation component 7 includes a translation screw 71 that rotates through a bearing on the inner wall of the fixed frame 4. The translation screw 71 is movably connected to the scraper 6 through a threaded sleeve. A driving motor 72 is fixed on the outer side of the filter box 1. The output shaft of the driving motor 72 penetrates into the inner cavity of the fixed frame 4 and is fixedly connected to one end of the translation screw 71. By driving the driving motor 72 to drive the translation screw 71 to rotate, the rotation of the translation screw 71 cooperates with the threaded sleeve installed on the scraper 6 to drive the scraper 6, so that the scraper 6 moves in the fixed frame 4. The impurities filtered by the filter net 5 in the fixed frame 4 are pushed and gathered to one side by the movement of the scraper 6, and then the impurities are removed from the filter box 1, but still remain in the fixed frame 4, which is convenient for cleaning from the outside of the filter box 1.

[0039] Furthermore, as Figure 3 shown:

[0040] A support column 16 is fixed to the bottom of the magnetic attraction plate 8. An installation groove is opened on one side of the filter box 1. One end of the support column 16 is fixed with an installation seat 17, and the installation seat 17 is installed on the outside of the installation groove. The support column 16 is used to install the magnetic attraction plate 8, and then the support column 16 is connected through the installation seat 17, which is convenient for removing the magnetic attraction plate 8 and the support column 16 from the filter box 1 to clean the iron filings adsorbed on the magnetic attraction plate 8, so as to avoid excessive adsorption of iron filings and reduce the adsorption force.

[0041] Preferably, as Figure 2 shown:

[0042] A diversion plate 18 is fixed in the inner cavity of the filter box 1. A blanking hole 19 is opened on the diversion plate 18, and the blanking hole 19 is located above the magnetic attraction plate 8. Through the setting of the diversion plate 18, it is convenient to disperse the pulp introduced from the pulp conveying pipe 3 and evenly disperse it to multiple blanking holes 19. At the same time, the impact of the pulp on the magnetic attraction plate 8 can be reduced, ensuring that the magnetic attraction plate 8 fully adsorbs and removes the iron filings in the pulp.

[0043] It should be noted that, as Figure 4 shown:

[0044] A chute 20 is opened in the inner cavity of the fixed frame 4. A slider 21 is slidably connected in the inner cavity of the chute 20. The opposite sides of the slider 21 penetrate through the chute 20 and are fixed on the outside of the scraper 6. By sliding the slider 21 in the chute 20, it is convenient to limit the position of the scraper 6, prevent the scraper 6 from rotating as the translation screw 71 rotates, resulting in the breakage of the scraper 6, and at the same time, it can assist the scraper 6 to slide in the fixed frame 4 to push the impurities out of the filter box 1.

[0045] In a further preferred embodiment, as Figure 2As shown in:

[0046] A limiting hole 22 is provided on one side of the inner cavity of the filtering box 1. One end of the support column 16 away from the mounting base 17 extends into the limiting hole 22. Through the setting of the limiting hole 22, it is convenient for one end of the support column 16 away from the mounting base 17 to be inserted into the limiting hole 22, ensuring the stability of the support column 16 and the magnetic attraction plate 8, and preventing the support column 16 from shaking under the impact of the pulp.

[0047] In addition, as Figure 2 and Figure 5 shown in:

[0048] A delivery pump 23 is installed on the delivery pipe 11. The delivery pump 23 is fixed on the top of the screening box 2. Through the setting of the delivery pump 23, it is convenient to deliver the filtered pulp, and at the same time pressurize the pulp, so that the pulp has sufficient speed when entering the screening box 2, maintaining the centrifugal movement of the pulp in the screening box 2 and facilitating the screening of long-fiber and short-fiber pulp.

[0049] In this embodiment, as Figure 5 shown in:

[0050] The top of the inner cavity of the screening box 2 is arranged in an inverted funnel shape. The feed port 10 penetrates through the side wall of the screening box 2 obliquely. The feed port 10 is located above the discharge port 14. Through the limitation of the top structure of the inner cavity of the screening box 2, it is convenient to collect the floating short-fiber pulp, avoiding the retention of the pulp at the top edge of the inner cavity of the screening box 2. At the same time, through the limitation of the positions of the feed port 10 and the discharge port 14, it is ensured that the long fibers in the pulp sink under the centrifugal force, and at the same time, there is sufficient space for the pulp entering the screening box 2 to perform centrifugation to achieve stratification.

[0051] In addition, as Figure 2 shown in:

[0052] One side of the fixed frame 4 penetrates to the outside of the filtering box 1, and the filter net 5 is located inside the filtering box 1. Through the limitation of the position of the filter net 5, it is ensured that the pulp flows from top to bottom in the filtering box 1, avoiding taking out the pulp together when pushing the impurities.

[0053] In this embodiment, as Figure 1 shown in:

[0054] The bottom of the filtering box 1 is fixed with a support frame 24. The support frame 24 is fixed on the top of the screening box 2. Control valves are installed on both the first discharge pipe 12 and the second discharge pipe 15. The filtering box 1 is supported by the support frame 24 to ensure the stability of the filtering box 1 and avoid the breakage of the delivery pipe 11 at the same time.

[0055] During specific use, the pulp to be deslagged is introduced into the filtration box 1 from the pulp delivery pipe 3. The pulp first falls on the diversion plate 18, and after being evenly dispersed by the diversion plate 18, it falls through the material discharge hole 19. During the falling process, it drips onto the magnetic attraction plate 8. The magnetic attraction plate 8 adsorbs the iron filings in the pulp. Subsequently, the pulp with the iron filings removed falls into the fixed frame 4. Then, the filter screen 5 at the bottom of the fixed frame 4 filters the impurities in the pulp, allowing the pulp to continue to fall through the filter screen 5 and reach the bottom of the inner cavity of the filtration box 1. At the same time, the impurities are continuously aggregated in the fixed frame 4. The drive motor 72 is periodically started. The drive motor 72 drives the translation screw rod 71 to rotate. The translation screw rod 71 drives the scraper 6 to translate in the fixed frame 4 through the threaded sleeve, gathering the impurities on the filter screen 5 to one side and then removing them from the filtration box 1. The pulp aggregated in the filtration box 1 is pressurized and conveyed by the delivery pump 23 and introduced into the first box body 9. Subsequently, the pulp accelerates into the selection box 2 through the inclined feed port 10. The pulp rotates spirally in the selection box 2. Under the action of centrifugal force, centripetal buoyancy, fluid drag force, etc., which are of different magnitudes, and due to the centrifugal sedimentation effect, most of the long fibers sink to the bottom of the inner cavity of the selection box 2 and flow into the second box body 13 from the discharge port 14, while most of the short fibers float and are discharged through the first discharge pipe 12, thus achieving the purpose of separation and grading.

[0056] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulp deslagging device for paper product manufacturing, characterized in that: include: A filtering box (1) and a selecting box (2); The top of the filter box (1) is connected to a pulp conveying pipe (3) for conveying pulp, a fixed frame (4) is fixed inside the filter box (1), a filter screen (5) for filtering impurities is embedded in the bottom of the fixed frame (4), a scraper (6) is slidably arranged inside the fixed frame (4), and a translation assembly (7) for translating the scraper (6) is arranged inside the filter box (1) to gather impurities; The inner cavity of the filter box (1) is also provided with a plurality of groups of magnetic suction plates (8) for removing iron filings in the pulp; A first box body (9) is fixed to the outer side of the selection box (2), and a plurality of feed ports (10) are provided on the side wall of the selection box (2). The first box body (9) is connected to the bottom of the filter box (1) via a conveying pipe (11), and a first discharge pipe (12) is connected to the top of the selection box (2). A second box body (13) is fixed to the lower end of the outer side of the selection box (2), and a discharge port (14) connected to the second box body (13) is provided on the side wall of the selection box (2), and a second discharge pipe (15) is connected to the second box body (13).

2. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: The translation assembly (7) comprises a translation screw (71) which rotates on the inner wall of the fixed frame (4) via a bearing, and the translation screw (71) is movably connected to the scraper (6) via a threaded sleeve. A drive motor (72) is fixed to the outside of the filter box (1), and the output shaft of the drive motor (72) passes through the inner cavity of the fixed frame (4) and is fixedly connected to one end of the translation screw (71).

3. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: A support column (16) is fixed to the bottom of the magnetic attraction plate (8), a mounting groove is provided on one side of the filter box (1), a mounting seat (17) is fixed to one end of the support column (16), and the mounting seat (17) is installed on the outside of the mounting groove.

4. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: A diverter plate (18) is fixed to the inner cavity of the filter box (1), and a feed hole (19) is provided on the diverter plate (18), and the feed hole (19) is located above the magnetic attraction plate (8).

5. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: The inner cavity of the fixed frame (4) is provided with a slide groove (20), the inner cavity of the slide groove (20) is slidably connected with a slider (21), and the opposite side of the slider (21) passes through the slide groove (20) and is fixed on the outer side of the scraper (6).

6. The pulp deslagging equipment for paper product manufacturing according to claim 3, characterized in that: A limiting hole (22) is provided on one side of the inner cavity of the filter box (1), and one end of the support column (16) away from the mounting seat (17) extends into the limiting hole (22).

7. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: A delivery pump (23) is installed on the delivery pipe (11), and the delivery pump (23) is fixed on the top of the selection box (2).

8. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: The top of the inner cavity of the selection box (2) is arranged in an inverted funnel shape, and the feed port (10) is inclined and penetrates the side wall of the selection box (2), and the feed port (10) is located above the discharge port (14).

9. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: One side of the fixing frame (4) penetrates to the outside of the filter box (1), and the filter screen (5) is located on the inside of the filter box (1).

10. The pulp deslagging equipment for paper product manufacturing according to claim 1, characterized in that: A support frame (24) is fixed to the bottom of the filter box (1), and the support frame (24) is fixed to the top of the selection box (2). Control valves are installed on the first discharge pipe (12) and the second discharge pipe (15).

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