A fine screen tailings disposal system

Abstract

The present application relates to the technical field of tailings treatment of cold grinding machine, in particular to a fine screen tailings treatment system, which comprises a grinding roller arranged in the cold grinding machine body, a liquid discharge opening arranged in the cold grinding machine body, an output pipe arranged at the output end of the material pumping body, and a spiral pulp extruder arranged on the surface of the material guide frame; the beneficial effects are as follows: firstly, the wood pulp tailings are extruded by the spiral pulp extruder and then enter the cold grinding machine body, then the wood pulp tailings enter the cold grinding machine body and then flow out through the liquid discharge opening, so that the subsequent papermaking finished product pool is convenient, the unqualified tailings are returned to the cold grinding machine body through the cooperation of the material pumping body, the material conveying pipe and the output pipe, and then the tailings are secondarily ground by the grinding roller or the output pipe is connected to the side of the spiral pulp extruder to make the tailings circulate again, the purpose is to improve the wood chip pulp yield and reduce the production cost, and the problem of low utilization rate of actual wood pulp is avoided.

Description

Technical Field

[0001] This invention relates to the field of cold mill tailings treatment technology, specifically a fine screening tailings treatment system. Background Technology

[0002] A cold refining mill is a special type of mechanical equipment mainly used in the pulp and paper industry for the refining and dispersion of fibers. This machine can operate in a low-temperature environment to reduce heat damage to the fibers during processing, thereby maintaining the good properties of the fibers.

[0003] Because the recycling cycle of domestic waste paper fiber raw materials is short, the fiber quality is difficult to meet the strength requirements of recycled paperboard making, which easily leads to problems such as low stiffness, folding endurance and thickness of finished paper. In order to solve this problem, domestic recycled paper production companies have been looking for other papermaking raw materials. High-yield groundwood pulp, due to its high yield and long fibers, can be used as a paper filler to improve the bulk and strength of paper, and has been favored by various papermaking companies.

[0004] However, since groundwood pulp is directly fed into the mill after being soaked and fermented from log chips, the fiber passing rate through a 60-mesh sieve after milling is about 80%, and the slag discharge is as high as 20%, resulting in low actual utilization of groundwood pulp. If the pulp slag is directly fed to the paper machine, not only will the low fiber bonding force cause low interlayer bonding strength in the finished paper, but the low tensile strength between fibers will also cause paper breaks, affecting the operating efficiency of the paper machine.

[0005] Therefore, this invention proposes a fine screening tailings treatment system to solve the aforementioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a fine screening tailings treatment system to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fine screening tailings treatment system, the fine screening tailings treatment system comprising: a cold mill body, a grinding roller is provided inside the cold mill body, a rotating rod is provided at one end of the grinding roller, a support rod is provided at the other end of the grinding roller, a discharge port is provided on the surface of the cold mill body, and a drain port is provided on the side of the discharge port. The storage frame has a conveying pipe on its side, one end of which is connected to a pump body. The output end of the pump body has an output pipe. The surface of the cold mill body has a guide frame, and the surface of the guide frame has a spiral extruder.

[0008] Preferably, the grinding roller is provided with balls that can roll inside the grinding roller with the help of external force. The grinding roller has a placement groove on its surface and a fixing rod on the side of the placement groove. An auxiliary roller is sleeved on the surface of the fixing rod. The auxiliary roller has protrusions on its surface. There are multiple sets of protrusions. The multiple sets of protrusions are arranged in a regular circular pattern about the center point of the end face of the auxiliary roller. The protrusions are in the form of a rhomboid prism structure. The placement groove is in the form of a square plate structure.

[0009] Preferably, a support frame is fixedly connected to the side of the cold grinding mill body. One end of the support frame is hinged to a fixed bracket. A drive motor is provided on the surface of the fixed bracket. The drive motor is fixedly connected to the surface of the fixed bracket. The transmission end of the drive motor is fixedly connected to the end face of the rotating rod. The drive motor can be used in conjunction with the rotating rod to drive the grinding roller to rotate.

[0010] Preferably, the surface of the cold grinding mill body is provided with a protective cover, which can cover the cold grinding mill body and the top of the storage frame. The protective cover is fixedly connected to the surface of the cold grinding mill body by positioning bolts. The surface of the protective cover has a placement opening, and a transparent plate is placed in the placement opening. The transparent plate has a square plate structure.

[0011] Preferably, the storage frame is fixedly connected to the end face of the cold grinding mill body, a positioning plate is provided on the inner side of the storage frame, a guide hole is opened on the surface of the positioning plate, a limit bearing is fixedly connected to the surface of the positioning plate, a support screw is fixedly connected to the inner ring surface of the limit bearing, and a limit nut is sleeved on the surface of the support screw.

[0012] Preferably, a first bearing is sleeved on one end of the support rod, a lifting plate is provided on the outer ring surface of the first bearing, a threaded groove is provided at the bottom of the lifting plate, a guide rod is provided at the bottom of the lifting plate, one end of the guide rod is inserted into the guide hole, the guide rod can move up and down in the guide hole, and one end of the support screw can be screwed into the threaded groove.

[0013] Preferably, the cold mill body has a bottom plate on its side, the pump body is fixedly connected to the surface of the bottom plate, one end of the conveying pipe is inserted into the storage frame, the other end of the conveying pipe is fixedly connected to the input end of the pump body, one end of the output pipe is fixedly connected to the output end of the pump body, and the other end of the output pipe can be inserted into the side of the guide frame or into the spiral extruder.

[0014] Preferably, a sealing plate is provided at one end of the discharge port for sealing, and a positioning groove is provided on the inner side of the discharge port. The positioning groove is square plate-shaped. A filter frame can be inserted into the other end of the discharge port. The filter frame has an arc-shaped frame structure and a screening screen is provided inside the filter frame.

[0015] Preferably, a first fixing plate is fixedly connected to the bottom of the filter frame. A moving groove is opened on the end face of the first fixing plate. A limit rod is provided on the side of the moving groove. A limit spring and a limit block are sleeved on the surface of the limit rod. The limit block can move along the limit rod.

[0016] Preferably, one end of the limiting spring is fixedly connected to the inner side of the moving groove, and the other end of the limiting spring is fixedly connected to the side of the limiting block. One end of the limiting block can be inserted into the positioning slot. A push plate is provided at the bottom of the limiting block, and the side length of the push plate is greater than the side length of the moving groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are: The fine screening tailings treatment system proposed in this invention first compresses the wood chip tailings (in the form of wood chips) through a screw press and then introduces them into the cold mill body at a high concentration. After the wood pulp tailings enter the cold mill body, the good pulp flows out through the drain port for subsequent entry into the papermaking finished product pool. The unqualified tailings are returned to the cold mill body by the pump body in conjunction with the conveying pipe and the output pipe for secondary grinding by the grinding roller, or the output pipe is connected to the side of the screw press to allow the tailings to be recycled and ground again. The purpose is to improve the pulp yield of wood chips, reduce production costs, and avoid the problem of low actual wood chip pulp utilization. Attached Figure Description Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after the protective cover is removed; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the structure of the present invention after the grinding roller is removed; Figure 5 This is a schematic diagram of the structure of the present invention when it is tilted; Figure 6 This is a schematic diagram of the resulting material storage frame structure of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point B; Figure 8 This is a partial cross-sectional view of the material guide frame of the present invention; Figure 9 This is a partial cross-sectional view of the structure of the present invention; Figure 10 for Figure 9 Enlarged structural diagram at point C; Figure 11 This is a schematic diagram of the sieve structure of the present invention.

[0018] In the diagram: 1. Cold grinding mill body; 2. Grinding roller; 3. Rotating rod; 4. Support rod; 5. Feed port; 6. Storage frame; 7. Conveying pipe; 8. Pump body; 9. Output pipe; 10. Guide frame; 11. Spiral extruder; 12. Ball bearing; 13. Placement trough; 14. Fixing rod; 15. Auxiliary roller; 16. Protrusion; 17. Support frame; 18. Hinge; 19. Fixed bracket; 20. Drive motor; 21. Protective cover; 22. Transparent plate; 23. Positioning plate; 24. Guide hole; 25. Limit bearing; 26. Support screw; 27. Limit nut; 28. First bearing; 29. ​​Lifting plate; 30. Threaded groove; 31. Guide rod; 32. Base plate; 33. Sealing plate; 34. Positioning slot; 35. Filter frame; 36. Screening screen; 37. First fixing plate; 38. Moving groove; 39. Limit rod; 40. Limit spring; 41. Limit block; 42. Push plate; 43. Drain port. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1-11 The present invention provides a technical solution: a fine screening tailings treatment system, the fine screening tailings treatment system includes: a cold mill body 1, a grinding roller 2 is provided inside the cold mill body 1, a rotating rod 3 is provided at one end of the grinding roller 2, a support rod 4 is provided at the other end of the grinding roller 2, a discharge port 5 is opened on the surface of the cold mill body 1, and a drain port 43 is opened on the side of the discharge port 5. The storage frame 6 has a conveying pipe 7 on its side. One end of the conveying pipe 7 is connected to a pump body 8. The output end of the pump body 8 is provided with an output pipe 9. The surface of the cold mill body 1 is provided with a guide frame 10. The surface of the guide frame 10 is provided with a spiral extruder 11. First, the wood chip residue (in the form of wood chips) is squeezed by the screw press 11 and then enters the cold refiner body 1 with high concentration. After the wood chip residue enters the cold refiner body 1, the good pulp flows out through the drain port 43 for subsequent entry into the papermaking finished product pool. The unqualified residue is returned to the cold refiner body 1 by the pump body 8 in conjunction with the conveying pipe 7 and the output pipe 9. It is then ground again by the grinding roller 2, or the output pipe 9 is connected to the side of the screw press 11 to recirculate the residue for grinding. The purpose is to improve the pulp yield of wood chips, reduce production costs, and avoid the problem of low actual wood chip pulp utilization.

[0021] Example 2: Based on Example 1, a grinding roller 2 is provided to improve the grinding of tailings. A ball bearing 12 is provided inside the grinding roller 2. The ball bearing 12 can roll inside the grinding roller 2 with the help of external force. A placement groove 13 is opened on the surface of the grinding roller 2. A fixing rod 14 is provided on the side of the placement groove 13. An auxiliary roller 15 is sleeved on the surface of the fixing rod 14. A protrusion 16 is provided on the surface of the auxiliary roller 15. There are multiple sets of protrusions 16. The multiple sets of protrusions 16 are arranged in a regular circular pattern about the center point of the end face of the auxiliary roller 15. The protrusions 16 are in a rhomboid prism structure. The placement groove 13 is in a square plate structure. A support frame 17 is fixedly connected to the side of the cold grinding mill body 1. One end of the support frame 17 is hinged to a fixed bracket 19 through a hinge 18. A drive motor 20 is provided on the surface of the fixed bracket 19. The drive motor 20 is fixedly connected to the surface of the fixed bracket 19. The transmission end of the drive motor 20 is fixedly connected to the end face of the rotating rod 3. The drive motor 20 can be used to drive the grinding roller 2 to rotate in conjunction with the rotating rod 3. During use, the grinding roller 2 can be driven by the drive motor 20 to rotate. Then, the grinding roller 2 is equipped with balls 12, which work in conjunction with the auxiliary roller 15 to improve the grinding of the tailings and obtain more good liquid. The protrusions 16 on the surface of the auxiliary roller 15 can be used to further improve the grinding effect of the tailings and improve the utilization rate after grinding.

[0022] To facilitate grinding tailings of different sizes, a lifting plate 29 is provided. A first bearing 28 is fitted onto one end of the support rod 4. The lifting plate 29 is located on the outer ring surface of the first bearing 28. A threaded groove 30 is provided at the bottom of the lifting plate 29. A guide rod 31 is provided at the bottom of the lifting plate 29. One end of the guide rod 31 is inserted into the guide hole 24, allowing it to move up and down within the guide hole 24. One end of the support screw 26 can be screwed into the threaded groove 30. The storage frame 6 is fixedly connected to the end face of the cold mill body 1. A positioning plate 23 is provided on the inner side of the storage frame 6. The positioning plate 23 has a guide hole 24 on its surface. A limit bearing 25 is fixedly connected to the surface of the positioning plate 23. A support screw 26 is fixedly connected to the inner ring surface of the limit bearing 25. A limit nut 27 is sleeved on the surface of the support screw 26. A protective cover 21 is provided on the surface of the cold grinding mill body 1. The protective cover 21 can cover the cold grinding mill body 1 and the top of the storage frame 6. The protective cover 21 is fixedly connected to the surface of the cold grinding mill body 1 by positioning bolts. A placement opening is provided on the surface of the protective cover 21. A transparent plate 22 is provided in the placement opening. The transparent plate 22 has a square plate structure. During use, the support screw 26 can be rotated in conjunction with the limit bearing 25 and the limit nut 27, thereby allowing the lifting plate 29 to move up and down in conjunction with the threaded groove 30. The displacement of the guide rod 31 in the guide hole 24 can prevent the lifting plate 29 from rotating when the support screw 26 is rotated. When the lifting plate 29 is adjusted up and down, the contact distance between the grinding roller 2 and the cold grinding machine body 1 can be increased. The support frame 17 and the fixed bracket 19 are connected by the hinge 18, thereby avoiding the problem of conflict between the moving grinding roller 2 and the drive motor 20. The drive motor 20 can also be rotated. The protective cover 21 can protect the grinding roller 2 on the one hand, and the transparent plate 22 on the surface of the protective cover 21 can be used to make it easy for the staff to observe the grinding of the grinding roller 2, thus improving the convenience of use.

[0023] Example 3: Based on Example 2, in order to improve the pulp yield of wood chips, a pump body 8 is provided. A base plate 32 is provided on the side of the cold mill body 1. The pump body 8 is fixedly connected to the surface of the base plate 32. One end of the conveying pipe 7 is inserted into the storage frame 6, and the other end of the conveying pipe 7 is fixedly connected to the input end of the pump body 8. One end of the output pipe 9 is fixedly connected to the output end of the pump body 8, and the other end of the output pipe 9 can be inserted into the side of the guide frame 10 or into the spiral pulper 11. When the tailings are ground by the grinding roller 2, the output pipe 9 is first connected to the spiral extruder 11. Then, the tailings can be fed back into the spiral extruder 11 for re-circulation and grinding through the feed pipe 7 and the output pipe 9 via the feed pump body 8, thereby improving the pulp yield of wood chips and reducing production costs. In order to facilitate direct secondary grinding of the tailings, one end of the output pipe 9 can be removed from the spiral extruder 11 and connected to the guide frame 10, so that the tailings after the first grinding can be directly fed into the guide frame 10 for secondary grinding by the grinding roller 2.

[0024] A sieve 36 is provided to facilitate the direct delivery of the grinding solution. A sealing plate 33 is provided at one end of the feed port 5 for sealing. A positioning groove 34 is provided on the inner side of the feed port 5. The positioning groove 34 is square plate-shaped. A filter frame 35 can be inserted into the other end of the feed port 5. The filter frame 35 has an arc-shaped frame structure. The sieve 36 is provided inside the filter frame 35. A first fixing plate 37 is fixedly connected to the bottom of the filter frame 35. A moving groove 38 is provided on the end face of the first fixing plate 37. A limiting rod 39 is provided on the side of the moving groove 38. A limiting spring 40 and a limiting block 41 are sleeved on the surface of the limiting rod 39. The limiting block 41 can move along the limiting rod 39. One end of the limiting spring 40 is fixedly connected to the inner side of the moving groove 38, and the other end of the limiting spring 40 is fixedly connected to the side of the limiting block 41. One end of the limiting block 41 can be inserted into the positioning slot 34. A push plate 42 is provided at the bottom of the limiting block 41. The side length of the push plate 42 is greater than the side length of the moving groove 38. When in use, the good liquid produced after grinding by the grinding roller 2 can flow out through the screening screen 36. The good liquid can flow into the discharge port 43 along the feed port 5 and then be discharged through the discharge port 43. The screening screen 36 is designed to facilitate the direct flow of the good liquid and also prevent tailings from falling into the feed port 5. The sealing plate 33 can seal one end of the feed port 5. When the screening screen 36 needs to be inspected, first remove the sealing plate 33 from one end of the feed port 5, and then push the push plate 42 to make the limiting block 41 move along the limiting rod 39. This allows the limiting block 41 to disengage from the positioning slot 34, thus eliminating the limiting effect of the positioning slot 34 on the first fixed plate 37. Consequently, the first fixed plate 37 can be removed from the discharge port 5, making it convenient to remove the screening screen 36 from the discharge port 5 for inspection. The setting of the limiting spring 40 also facilitates the automatic reset of the limiting block 41 after it is pulled. The setting of the push plate 42 facilitates pushing the limiting block 41 and also prevents the limiting block 41 from disengaging from the limiting rod 39.

[0025] In actual use, the wood pulp tailings (in the form of wood chips) are squeezed by the screw press 11 and then enter the cold refiner body 1 with high concentration. After the wood pulp tailings enter the cold refiner body 1, the good pulp flows out through the drain port 43 for subsequent entry into the papermaking finished product pool. The unqualified tailings are returned to the cold refiner body 1 by the pump body 8 in conjunction with the conveying pipe 7 and the output pipe 9, and are then ground a second time by the grinding roller 2. Alternatively, the output pipe 9 can be connected to the side of the screw press 11 to allow the tailings to be circulated and ground again. The aim is to increase the pulp yield from wood chips, reduce production costs, and avoid the problem of low actual wood chip pulp utilization. This avoids the common practice of simply soaking and fermenting log chips before directly feeding them into the mill, where the fiber passing through a 60-mesh sieve after milling is about 80%, and the slag discharge is as high as 20%, resulting in low actual wood chip pulp utilization. If the pulp slag is directly fed to the paper machine, not only will the low fiber bonding force lead to low interlayer bonding strength in the finished paper, but the low tensile strength between fibers will also cause paper breaks, affecting the paper machine's operating efficiency.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fine screening tailings treatment system, characterized in that: The fine screening tailings treatment system includes: a cold mill body (1), a grinding roller (2) is provided inside the cold mill body (1), a rotating rod (3) is provided at one end of the grinding roller (2), a support rod (4) is provided at the other end of the grinding roller (2), a discharge port (5) is provided on the surface of the cold mill body (1), and a drain port (43) is provided on the side of the discharge port (5). A storage frame (6) is provided with a conveying pipe (7) on its side. One end of the conveying pipe (7) is connected to a pump body (8). The output end of the pump body (8) is provided with an output pipe (9). A guide frame (10) is provided on the surface of the cold mill body (1). A spiral extruder (11) is provided on the surface of the guide frame (10). A ball bearing (12) is provided inside the grinding roller (2). The ball bearing (12) rolls inside the grinding roller (2) with the help of external force. A placement groove (13) is opened on the surface of the grinding roller (2). A fixing rod (14) is provided on the side of the placement groove (13). An auxiliary roller (15) is fitted on the surface of the fixed rod (14). The surface of the auxiliary roller (15) is provided with protrusions (16). Multiple sets of protrusions (16) are arranged in a regular circular pattern about the center point of the end face of the auxiliary roller (15). The overall structure of the protrusions (16) is a rhomboid prism. The placement groove (13) is a square plate structure. A support frame (17) is fixedly connected to the side of the cold grinding mill body (1). One end of the support frame (17) is hinged to a fixed bracket (19) via a hinge (18). A drive motor is installed on the surface of the fixed bracket (19). 20), the drive motor (20) is fixedly connected to the surface of the fixed bracket (19), and the transmission end of the drive motor (20) is fixedly connected to the end face of the rotating rod (3). The drive motor (20) and the rotating rod (3) are used to drive the grinding roller (2) to rotate; the storage frame (6) is fixedly connected to the end face of the cold grinding mill body (1). The inner side of the storage frame (6) is provided with a positioning plate (23). The surface of the positioning plate (23) is provided with a guide hole (24). The surface of the positioning plate (23) is fixedly connected with a limit bearing (25). The inner ring of the limit bearing (25) A support screw (26) is fixedly connected to the surface, and a limiting nut (27) is sleeved on the surface of the support screw (26); a first bearing (28) is sleeved on one end of the support rod (4), and a lifting plate (29) is provided on the outer ring surface of the first bearing (28). A threaded groove (30) is opened at the bottom of the lifting plate (29), and a guide rod (31) is provided at the bottom of the lifting plate (29). One end of the guide rod (31) is inserted into the guide hole (24), and the guide rod (31) moves up and down in the guide hole (24). One end of the support screw (26) is screwed into the threaded groove (30).

2. The fine screening tailings treatment system according to claim 1, characterized in that: The surface of the cold grinding mill body (1) is provided with a protective cover (21). The protective cover (21) covers the cold grinding mill body (1) and the storage frame (6) above. The protective cover (21) is fixedly connected to the surface of the cold grinding mill body (1) by positioning bolts. The surface of the protective cover (21) has a placement opening, and a transparent plate (22) is provided in the placement opening. The transparent plate (22) has a square plate structure.

3. The fine screening tailings treatment system according to claim 1, characterized in that: The cold mill body (1) has a base plate (32) on its side. The pump body (8) is fixedly connected to the surface of the base plate (32). One end of the conveying pipe (7) is inserted into the storage frame (6), and the other end of the conveying pipe (7) is fixedly connected to the input end of the pump body (8). One end of the output pipe (9) is fixedly connected to the output end of the pump body (8), and the other end of the output pipe (9) is inserted into the side of the guide frame (10) or into the spiral extruder (11).

4. The fine screening tailings treatment system according to claim 1, characterized in that: The discharge port (5) is sealed with a sealing plate (33) at one end. A positioning slot (34) is provided on the inner side of the discharge port (5). The positioning slot (34) is square plate-shaped. A filter frame (35) is inserted into the other end of the discharge port (5). The filter frame (35) is an arc-shaped frame structure. A screening screen (36) is provided inside the filter frame (35).

5. The fine screening tailings treatment system according to claim 4, characterized in that: The filter frame (35) is fixedly connected to a first fixing plate (37) at the bottom. A moving groove (38) is provided on the end face of the first fixing plate (37). A limiting rod (39) is provided on the side of the moving groove (38). A limiting spring (40) and a limiting block (41) are sleeved on the surface of the limiting rod (39). The limiting block (41) moves along the limiting rod (39).

6. The fine screening tailings treatment system according to claim 5, characterized in that: One end of the limiting spring (40) is fixedly connected to the inner side of the moving groove (38), and the other end of the limiting spring (40) is fixedly connected to the side of the limiting block (41). One end of the limiting block (41) is inserted into the positioning slot (34). A push plate (42) is provided at the bottom of the limiting block (41). The side length of the push plate (42) is greater than the side length of the moving groove (38).

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