A facing layer flow device

Abstract

The utility model relates to a kind of surface layer flow sending device.It solves the problem that surface layer flow sending process is complex, cost is high, and good paste recycling is difficult to effectively realize in prior art.It includes surface layer paste supply pipe, surface layer paste supply pipe is connected with first deslagging component and machine white water tank outside respectively by shunt pipe, first deslagging component is connected with second deslagging component, second deslagging component is connected with bottom layer machine white water tank outside to carry out residue paste conveying, machine white water tank outside is connected with pressure deslagging separation structure.The utility model has the advantages of realizing the hierarchical recovery and high-efficiency reuse of good paste, simplifying the traditional complex flow sending path, greatly reducing the operation difficulty of flow sending process, reducing equipment operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, specifically to a surface layer conveying device. Background Technology

[0002] In paperboard production, each layer has its own pulp supply system, flow system, and wire section. The flow system processes the pulp and transports it to the wire section. The laminar flow design steps are: bottom layer pulp preparation tank—bottom layer pulp preparation pump—bottom layer pulp forming tank—bottom layer top layer pump—flushing pump—first-stage pressure screen—first-stage screen tailings to the core layer three-stage screen feed pump. When producing white-backed white-board coated paper, the bottom layer first-stage screen tailings are switched to the top layer second-stage pressure screen feed pump inlet. When producing grey-backed coated white-board paper and white-backed white-board paper varieties, the machine needs to be stopped to switch the bottom layer first-stage screen tailings from the core layer three-stage screen feed pump inlet to the top layer second-stage pressure screen feed pump inlet. The pulp loss during this switching increases costs. Furthermore, the top layer flow process is complex, costly, and makes it difficult to effectively recycle and reuse good pulp.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses an online switching process for bottom layer flow of paper type switching in a five-layer papermaking machine with gray base coating [CN202510918488.4]. It includes a paper machine mixing tank, a mixing pump, a paper machine forming tank, a feeding pump, a flushing pump, a first-stage pressure screen, and a core layer third-stage pressure screen feed pump. The paper machine mixing tank is connected to the paper machine forming tank through pipes and the mixing pumps on the pipes. The paper machine forming tank is connected to the first-stage pressure screen through pipes and the feeding pumps and flushing pumps on the pipes. The first-stage pressure screen is connected to the surface layer second-stage pressure screen feed pump through a bypass pipe 1. The surface layer second-stage pressure screen feed pump is connected to the surface layer second-stage pressure screen through pipes.

[0004] The above solution has solved the problem of inconvenient operation when switching slurries in the laminar flow design in the existing technology to a certain extent. However, the solution still has many shortcomings, such as: the surface flow process is complicated, the cost is high, and it is difficult to effectively recycle and reuse good slurry. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a surface layer conveying device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a surface layer conveying device, comprising a surface layer slurry supply and conveying pipe, the surface layer slurry supply and conveying pipe being connected to a first slag removal component and an external white water tank via a diversion pipe, the first slag removal component being connected to a second slag removal component, the second slag removal component being connected to the bottom external white water tank for slurry conveying, and the external white water tank being connected to a pressure slag removal and separation structure.

[0007] In the above-mentioned surface layer conveying device, the pressure slag removal and separation structure is connected to the first slag removal component for good slurry conveying, and the first slag removal component and the second slag removal component convey slurry and perform good slurry return.

[0008] In the above-mentioned surface layer conveying device, the first slag removal component includes a first slag removal box. The first slag removal box has a feed hole on the lower side of one end and a slurry outlet on the upper side of the other end. The bottom of the first slag removal box is provided with a good slurry guide seat, and the bottom of the good slurry guide seat has a good slurry outlet.

[0009] In the above-mentioned surface layer conveying device, a lead screw motor is provided at both ends of the upper side of the first slag removal box. The rotating lead screw at the output end of the lead screw motor passes through the first slag removal box, and a slag removal coarse filter frame is passively lifted and lowered on the rotating lead screw. A limiting pressure frame corresponding to the slag removal coarse filter frame is provided in the first slag removal box and between the rotating lead screw and the lead screw motor.

[0010] In the above-mentioned surface layer conveying device, a feed valve is provided on the feed port, and a good slurry outlet valve is provided on the good slurry outlet. The feed valve and the good slurry outlet valve are connected to the control module.

[0011] In the above-mentioned surface layer conveying device, the second slag removal component includes a second slag removal box. The upper end of the side of the second slag removal box away from the first slag removal box is provided with a slag inlet hole connected to the slag outlet hole. A slag inlet valve is provided on the slag inlet hole. The end of the second slag removal box away from the first slag removal box is provided with a slag outlet, which is connected to the bottom layer machine external white water tank.

[0012] In the above-mentioned surface layer conveying device, the upper and lower sides of the inner wall of the second slag removal box are symmetrically provided with sliding grooves, and a slag removal fine filter frame is slidably arranged in the sliding grooves. A sliding drive cylinder is provided on the side of the second slag removal box close to the first slag removal box, and the output end of the sliding drive cylinder acts on the slag removal fine filter frame.

[0013] In the above-mentioned surface layer conveying device, the slag removal fine filter frame divides the inner cavity of the second slag removal box into a slag removal material chamber and a good slurry chamber. The lower end of the good slurry chamber is provided with a good slurry return port connected to the good slurry outlet, and a good slurry return valve is provided on the good slurry return port. The slag slurry inlet hole is connected to the slag removal material chamber.

[0014] In the aforementioned surface layer conveying device, a top pressure spring acting on the slag removal and fine filter frame is provided inside the chute.

[0015] In the above-mentioned surface layer conveying device, the pressure slag removal and separation structure includes a discharge pipe, which is connected to a pressure screen. The pressure screen is connected to the surface layer attenuation tank through a good slurry discharge pipe and to the bottom layer external white water tank through a slurry discharge pipe.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: the surface slurry supply and delivery pipe is directly connected to the first slag removal component, the second slag removal component, the external white water tank, and the pressure slag removal separation structure via a diversion pipe, simplifying the traditional complex flow path and significantly reducing the difficulty of controlling the flow process; secondly, the two-stage slag removal design of the first and second slag removal components, combined with the good slurry return channel between them and the pressure slag removal separation structure, directs the good slurry to the surface attenuation tank, realizing the graded recycling and efficient reuse of good slurry, and solving the technical problem of the difficulty in effectively recycling and utilizing good slurry; at the same time, the precise control of the valves by the control module further reduces the equipment operation, maintenance costs, and raw material waste costs, effectively solving the problem of high costs in the original technology. Attached Figure Description

[0017] Figure 1 This is a block diagram showing the overall structural connection of this utility model; Figure 2 This is a schematic diagram of the structure of the first slag removal component in this utility model; Figure 3 This is a schematic diagram of the structure of the second slag removal component in this utility model; Figure 4 This is a partial connection block diagram of the mechanism in this utility model; In the diagram: 1. Surface layer slurry supply and conveying pipe; 2. Diversion pipe; 3. First slag removal assembly; 31. First slag removal box; 32. Feed hole; 321. Feed valve; 33. Slurry outlet hole; 34. Good slurry guide seat; 35. Good slurry outlet; 351. Good slurry outlet valve; 36. Screw motor; 37. Rotating screw; 38. Slag removal coarse filter frame; 39. Limiting pressure frame; 4. External white water tank; 5. Second slag removal assembly; 51. Second slag removal box; 511. Slag removal material chamber; 512. Good slurry chamber; 52. Slurry inlet hole; 521. Slurry inlet valve; 53. Slurry outlet; 54. Slide chute; 55. Slag removal fine filter frame; 56. Sliding drive cylinder; 57. Top pressure spring; 58. Good slurry return port; 581. Good slurry return valve; 6. Bottom layer external white water tank; 7. Pressure slag removal and separation structure; 71. Discharge pipe; 72. Pressure screen; 73. Good slurry discharge pipe; 8. Control module. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1-4 As shown, a surface layer conveying device includes a surface layer slurry supply and conveying pipe 1. The surface layer slurry supply and conveying pipe 1 is connected to a first slag removal component 3 and an external white water tank 4 via a diversion pipe 2. The first slag removal component 3 is connected to a second slag removal component 5. The second slag removal component 5 is connected to the bottom external white water tank 6 for slurry conveying. The external white water tank 4 is connected to a pressure slag removal and separation structure 7.

[0020] A diversion valve is installed on the diversion pipe 2. The surface slurry is divided into two paths through the diversion pipe 2. One path flows to the first slag removal component 3, and the other path flows to the external white water tank 4, thus realizing the initial diversion treatment of the slurry supply.

[0021] The pressure slag removal and separation structure 7 is connected to the first slag removal component 3 for good slurry transportation, and the first slag removal component 3 and the second slag removal component 5 carry out slag slurry transportation and good slurry return.

[0022] As can be seen, the first slag removal component 3 includes a first slag removal box 31. The first slag removal box 31 has a feed hole 32 on the lower side of one end and a slurry outlet hole 33 on the upper side of the other end. The bottom of the first slag removal box 31 is provided with a good slurry guide seat 34, and the bottom of the good slurry guide seat 34 has a good slurry outlet 35.

[0023] Furthermore, a lead screw motor 36 is provided at both ends of the upper side of the first slag removal box 31. The rotating lead screw 37 at the output end of the lead screw motor 36 passes through the first slag removal box 31, and a slag removal coarse filter frame 38 is passively raised and lowered on the rotating lead screw 37. A limiting pressure frame 39 corresponding to the slag removal coarse filter frame 38 is provided inside the first slag removal box 31 and between the rotating lead screw 37 and the lead screw motor 36.

[0024] Obviously, a feed valve 321 is provided on the feed port 32, and a good pulp outlet valve 351 is provided on the good pulp outlet 35. The feed valve 321 and the good pulp outlet valve 351 are connected to the control module 8.

[0025] The slurry enters the first slag removal box 31 through the feed hole 32, and the feed valve 321 on the feed hole 32 is controlled by the control module 8 to open and close, adjusting the slurry feed rate. After the slurry enters the first slag removal box 31, it is coarsely filtered by the slag removal coarse filter frame 38. The slag removal coarse filter frame 38 is driven by the screw motor 36 to rotate the screw 37 to achieve lifting and lowering, and the limit pressure frame 39 limits its lifting and lowering position. The filtered good slurry is collected by the good slurry guide seat 34 and discharged from the good slurry outlet 35. The coarsely filtered slag slurry is discharged from the slag slurry outlet 33 and flows to the second slag removal component 5.

[0026] Furthermore, the second slag removal assembly 5 includes a second slag removal box 51. The upper end of the second slag removal box 51 away from the first slag removal box 31 is provided with a slag inlet hole 52 connected to the slag outlet hole 33. A slag inlet valve 521 is provided on the slag inlet hole 52. The end of the second slag removal box 51 away from the first slag removal box 31 is provided with a slag outlet 53. The slag outlet 53 is connected to the bottom machine external white water tank 6.

[0027] Specifically, the inner walls of the second slag removal box 51 are symmetrically provided with sliding grooves 54 on the upper and lower sides, and a slag removal fine filter frame 55 is slidably arranged in the sliding grooves 54. A sliding drive cylinder 56 is provided on the side of the second slag removal box 51 near the first slag removal box 31, and the output end of the sliding drive cylinder 56 acts on the slag removal fine filter frame 55.

[0028] Preferably, the slag removal fine filter frame 55 divides the inner cavity of the second slag removal box 51 into a slag removal material chamber 511 and a good slurry chamber 512. The lower end of the good slurry chamber 512 is provided with a good slurry return port 58 connected to the good slurry outlet 35, and a good slurry return valve 581 is provided on the good slurry return port 58. The aforementioned slag slurry inlet hole 52 is interconnected with the slag removal material chamber 511.

[0029] More specifically, a top pressure spring 57 acting on the slag removal fine filter frame 55 is provided inside the chute 54.

[0030] The slurry discharged from the first slag removal component 3 enters the slag removal chamber 511 through the slurry inlet hole 52. The slurry inlet valve 521 on the slurry inlet hole 52 controls the amount of slurry entering. The slag removal fine filter frame 55 performs fine filtration of the slurry in the second slag removal box 51. The slag removal fine filter frame 55 slides along the inner wall groove 54 and is driven by the sliding drive cylinder 56. The top pressure spring 57 assists in its reset to ensure the filter fit. The finely filtered slurry is discharged from the slurry outlet 53 and transported to the bottom machine external white water tank 6. The finely filtered slurry is collected in the fine slurry chamber 512 and returned to the fine slurry outlet 35 of the first slurry removal component 3 through the fine slurry return port 58, thereby realizing the secondary recovery of the fine slurry.

[0031] In addition, the pressure slag removal and separation structure 7 includes a discharge pipe 71, which is connected to a pressure screen 72. The pressure screen 72 is connected to the surface attenuation tank through a good slurry discharge pipe 73 and to the bottom machine external white water tank 6 through the slurry discharge pipe 71.

[0032] The slurry in the external white water tank 4 is transported to the pressure screen 72 through the discharge pipe 71. The pressure screen 72 performs deep slag removal and separation on the slurry. The separated good slurry is transported to the surface attenuation tank through the good slurry discharge pipe 73. The separated slag slurry is transported to the bottom external white water tank 6 through the slag slurry discharge pipe 71. Meanwhile, a portion of the good pulp separated by the pressure screen 72 is transported to the first slag removal component 3 to supplement the good pulp recovery.

[0033] In summary, the principle of this embodiment is as follows: One path of the slurry flows into the first slag removal component 3, and after coarse filtration by the coarse filter frame 38 inside the first slag removal box 31, good slurry and slag slurry are separated. The slag slurry is then transported to the second slag removal component 5, and after fine filtration by the fine filter frame 55, the good slurry flows back to the first slag removal component 3 through the good slurry return port 58. Another path flows into the external white water tank 4, and then undergoes deep slag removal by the pressure screen 72 of the pressure slag removal separation structure 7. The good slurry is then transported to the surface layer attenuation tank, and the slag slurry is uniformly sent to the bottom external white water tank 6. Stable operation is ensured throughout the process by the control module 8 regulating the valves. Through the coordinated design of the diversion pipe 2, the first slag removal component 3, and the second slag removal component 5, redundant steps in the surface layer flow are reduced, solving the problem of process complexity. Furthermore, by utilizing the good slurry return of the first slag removal component 3 and the second slag removal component 5, and the directional transport of the good slurry by the pressure slag removal separation structure 7, good slurry recovery during surface layer flow is achieved, reducing flow and raw material costs.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0035] Although this paper extensively uses the following components: surface slurry supply pipe 1, diversion pipe 2, first slag removal assembly 3, first slag removal box 31, feed hole 32, feed valve 321, slurry outlet 33, good slurry guide seat 34, good slurry outlet 35, good slurry outlet valve 351, lead screw motor 36, rotating lead screw 37, slag removal coarse filter frame 38, limiting pressure frame 39, external white water tank 4, second slag removal assembly 5, second slag removal box 51, and slag removal material chamber 5 11. Terms such as 512 (good pulp chamber), 523 (slurry inlet hole), 533 (slurry inlet valve), 544 (slurry removal and fine filter frame), 555 (sliding drive cylinder), 566 (top pressure spring), 577 (good pulp return port), 588 (good pulp return valve), 581 (bottom layer external white water tank), 68 (pressure slurry removal and separation structure), 79 (discharge pipe), 70 (pressure screen), 710 (good pulp discharge pipe), and 720 (control module) are used, but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A surface layer conveying device, comprising a surface layer slurry supply and conveying pipe (1), characterized in that, The surface slurry supply pipe (1) is connected to the first slag removal component (3) and the external white water tank (4) respectively through the diversion pipe (2). The first slag removal component (3) is connected to the second slag removal component (5). The second slag removal component (5) is connected to the bottom external white water tank (6) for slurry transportation. The external white water tank (4) is connected to the pressure slag removal separation structure (7).

2. The surface layer conveying device according to claim 1, characterized in that, The pressure slag removal and separation structure (7) is connected to the first slag removal component (3) for good slurry transportation, and the first slag removal component (3) and the second slag removal component (5) are used for slag slurry transportation and good slurry return.

3. The surface layer conveying device according to claim 1, characterized in that, The first slag removal assembly (3) includes a first slag removal box (31), which has a feed hole (32) on the lower side of one end and a slurry outlet hole (33) on the upper side of the other end. The bottom of the first slag removal box (31) is provided with a good slurry guide seat (34), and the bottom of the good slurry guide seat (34) has a good slurry outlet (35).

4. A surface layer conveying device according to claim 3, characterized in that, The first slag removal box (31) is provided with a screw motor (36) at both ends of the upper side. The rotating screw (37) at the output end of the screw motor (36) passes through the first slag removal box (31), and a slag removal coarse filter frame (38) is passively raised and lowered on the rotating screw (37). A limiting pressure frame (39) corresponding to the slag removal coarse filter frame (38) is provided in the first slag removal box (31) and between the rotating screw (37) and the screw motor (36).

5. A surface layer conveying device according to claim 4, characterized in that, The feed port (32) is provided with a feed valve (321), and the good pulp outlet (35) is provided with a good pulp outlet valve (351). The feed valve (321) and the good pulp outlet valve (351) are connected to the control module (8).

6. A surface layer conveying device according to claim 3, characterized in that, The second slag removal component (5) includes a second slag removal box (51). The upper end of the second slag removal box (51) away from the first slag removal box (31) is provided with a slag inlet hole (52) connected to the slag slurry outlet hole (33). A slag inlet valve (521) is provided on the slag inlet hole (52). A slag discharge outlet (53) is provided at the end of the second slag removal box (51) away from the first slag removal box (31). The slag discharge outlet (53) is connected to the bottom machine external white water tank (6).

7. A surface layer conveying device according to claim 6, characterized in that, The second slag removal box (51) has symmetrically arranged sliding grooves (54) on the upper and lower sides of its inner wall. A slag removal fine filter frame (55) is slidably arranged in the sliding groove (54). A sliding drive cylinder (56) is provided on the side of the second slag removal box (51) close to the first slag removal box (31), and the output end of the sliding drive cylinder (56) acts on the slag removal fine filter frame (55).

8. A surface layer conveying device according to claim 7, characterized in that, The slag removal fine filter frame (55) divides the inner cavity of the second slag removal box (51) into a slag removal material chamber (511) and a good slurry chamber (512). The lower end of the good slurry chamber (512) is provided with a good slurry return port (58) connected to the good slurry outlet (35), and a good slurry return valve (581) is provided on the good slurry return port (58). The slag slurry inlet hole (52) is connected to the slag removal material chamber (511).

9. A surface layer conveying device according to claim 8, characterized in that, The chute (54) is provided with a top pressure spring (57) that acts on the slag removal fine filter frame (55).

10. A surface layer conveying device according to claim 1, characterized in that, The pressure slag removal and separation structure (7) includes a discharge pipe (71), which is connected to a pressure screen (72). The pressure screen (72) is connected to the surface attenuation tank through a good slurry discharge pipe (73) and to the bottom machine external white water tank (6) through the slurry discharge pipe (71).

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