CN217678325U - Paper machine starching and flowing system - Google Patents
Paper machine starching and flowing system Download PDFInfo
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- CN217678325U CN217678325U CN202221295549.4U CN202221295549U CN217678325U CN 217678325 U CN217678325 U CN 217678325U CN 202221295549 U CN202221295549 U CN 202221295549U CN 217678325 U CN217678325 U CN 217678325U
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Abstract
A paper machine sizing flow conveying system relates to the technical field of paper machine flow conveying equipment, and adopts the technical scheme that the paper machine sizing flow conveying system comprises a flow box, a forming part and an external white water tank, wherein the external white water tank comprises a tank body, a bent part, a pulp outlet, a pulp inlet, a flow guide groove and a first water outlet; the pulp inlet of the bending part is sequentially connected with a pulp inlet pump and a pulp forming pool, the pulp outlet of the bending part is sequentially connected with a fan pump and a first-section pressure screen, the good pulp outlet of the first-section pressure screen is connected with a pulse buffer tank and a pulp flow box, the water outlet of the forming part is connected with a diversion trench through a white water chute, the residue pulp outlet of the first-section pressure screen is sequentially connected with a second-section pressure screen pump and a second-section pressure screen, and the good pulp outlet of the second-section pressure screen is connected with the pulp inlet of the bending part; the first water outlet of the tank body is sequentially connected with a dilution water sieve pump, a dilution water sieve and a head box. The utility model has the advantages of high utilization rate of white water, low fiber loss, high production efficiency and short flow.
Description
Technical Field
The utility model relates to a paper machine drifting equipment technical field especially relates to a paper machine starching drifting system.
Background
The approach system stores, matches, screens, purifies, dilutes, adjusts the thick liquid that comes from the pulping shop after handling and sends into the head box of paper machine, its main function includes effectively getting rid of impurity, guarantees entering the stability of thick liquid concentration, flow and pressure of head box etc.. However, in the current craft of craft paper and corrugated paper, the drifting system has the problems of low utilization ratio of white water, easy loss of fiber, low production efficiency caused by long process and more equipment, large occupied space and the like.
SUMMERY OF THE UTILITY MODEL
To the low-usage of plain boiled water among the prior art scheme, the fibre easily runs off, the long problem of procedure, the utility model provides a paper machine starching flow system.
The utility model provides a following technical scheme: a paper machine sizing flow conveying system comprises a flow box, a forming part and an external white water tank, wherein the flow box and the forming part are sequentially connected, the external white water tank comprises a conical tank body, one end with a smaller bottom area of the tank body faces downwards and is provided with a bent part, the tail end of the bent part is provided with a pulp outlet, the bent part is also provided with a pulp inlet, the outer wall of the top of the tank body is provided with a flow guide groove which surrounds the tank body and is communicated with the tank body, and the middle part of the tank body is provided with a first water outlet; the pulp inlet of the bent part is sequentially connected with a pulp inlet pump and a pulp forming pool through a pipeline, the pulp outlet of the bent part is sequentially connected with a fan pump and a first-section pressure screen through a pipeline, a good pulp outlet of the first-section pressure screen is connected to a pulse buffer tank through a pipeline, the pulse buffer tank is connected to a pulp flow box through a pipeline, a water outlet of the forming part is connected to a diversion trench through a white water chute, a residue pulp outlet of the first-section pressure screen is sequentially connected with a second-section pressure screen pump and a second-section pressure screen through a pipeline, and a good pulp outlet of the second-section pressure screen is connected to the pulp inlet of the bent part through a pipeline; the first water outlet of the tank body is sequentially connected with a dilution water sieve pump, a dilution water sieve and a head box through pipelines.
Preferably, an included angle between a tangent line of the central axis of the bending part and a horizontal plane is 20 to 40 degrees.
Preferably, the bottom surface of the diversion trench is an inclined surface, and the included angle between the bottom surface of the diversion trench and the horizontal plane is 10 to 30 degrees.
Preferably, the bottom end of the diversion trench is communicated with the trench body and is provided with an overflow port, and the overflow port is connected to the wire water tank through a pipeline.
Preferably, the middle part of the tank body is also provided with a second water outlet, and the second water outlet is connected to the water inlet of the two-section pressure screen pump through a pipeline.
Preferably, the slurry outlet of the secondary pressure screen is connected to a slurry tank.
Preferably, the roughness of the inner wall of the machine white water tank and the roughness of the inner wall of the pipeline are both 0.2 to 0.8 mu m.
The beneficial effects of the utility model are that: the recovery and utilization of the white water are realized through the external white water tank, the adjustment of concentration and flow and the supply of dispersion water to the head box are realized by utilizing the white water with different concentrations to the pulp inlet of the pulping tank and the two-stage pressure screen, the screening and purification of pulp are realized by utilizing the one-stage pressure screen and the two-stage pressure screen, and the pressure pulse generated by pulp flushing pumping is eliminated, buffered and attenuated by utilizing the pulse buffer tank, so that the device has the advantages of high utilization rate of the white water, low fiber loss, high production efficiency and short flow.
Drawings
Fig. 1 is a connection diagram of the device according to an embodiment of the present invention.
Fig. 2 is a side view of an embodiment of the external white water tank of the present invention.
Fig. 3 is a top view of an embodiment of the external white water tank of the present invention.
Reference numerals are as follows: 1-a head box, 2-a forming part, 3-an external white water tank, 31-a tank body, 32-a bending part, 33-a slurry outlet, 34-a slurry inlet, 35-a diversion trench, 36-an overflow port, 4-a slurry inlet pump, 5-a slurry forming pool, 6-a slurry flushing pump, 7-a first-stage pressure screen, 8-a pulse buffer tank, 9-a white water chute, 10-a second-stage pressure screen pump, 11-a second-stage pressure screen, 12-a dilution water screen pump and 13-a dilution water screen.
Detailed Description
The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement the embodiments after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a paper machine sizing flow system as shown in figures 1-3, which comprises a flow box 1 and a forming part 2 which are connected in sequence, and further comprises an external white water tank 3, wherein the external white water tank 3 comprises a tapered tank body 31, one end of the tank body 31 with smaller bottom area faces downwards and is provided with a bending part 32, the tail end of the bending part 32 is provided with a pulp outlet 33, the bending part 32 is also provided with a pulp inlet 34, the outer wall of the top of the tank body 31 is provided with a flow guide groove 35 which surrounds the tank body 31 and is communicated with the tank body 31, and the middle part of the tank body 31 is provided with a first water outlet; a pulp inlet 34 of the bending part 32 is sequentially connected with a pulp inlet pump 4 and a pulp forming pool 5 through pipelines, a pulp outlet 33 of the bending part 32 is sequentially connected with a fan pump 6 and a first-stage pressure screen 7 through pipelines, a good pulp outlet of the first-stage pressure screen 7 is connected to a pulse buffer tank 8 through a pipeline, the pulse buffer tank 8 is connected to a pulp flow box 1 through a pipeline, a water outlet of the forming part 2 is connected to a diversion trench 35 through a white water chute 9, a residue pulp outlet of the first-stage pressure screen 7 is sequentially connected with a second-stage pressure screen pump 10 and a second-stage pressure screen 11 through pipelines, and a good pulp outlet of the second-stage pressure screen 11 is connected to the pulp inlet 34 of the bending part 32 through a pipeline; a first water outlet of the tank body 31 is sequentially connected with a dilution water screen pump 12, a dilution water screen 13 and a head box 1 through pipelines.
The headbox 1 and the forming section 2 are components of a prior art paper machine, the headbox 1 evenly distributes pulp during forming, and the forming section 2 is used for dewatering and forming pulp. The outside white water tank 3 collects the white water removed from the web in the forming section 2 and deposits fibers in the white water, and a concentrated white water having a high concentration is formed in the bottom bent portion 32 of the outside white water tank 3, while the white water in the tank body 1 has a low concentration. The bending part 32 is also provided with a pulp inlet 34, the pulp from the pulp forming pool 5 enters the bending part 32 from the pulp inlet 34 and is mixed with the thick white water and then pumped to the section of the pressure screen 7 by the fan pump 6, and because the volume of the bending part 32 is relatively small and the bending part has a smooth curve structure, the pulp and the fibers in the thick white water have no retention area in the bending part 32, so that the pulp and the thick white water can be uniformly mixed to adjust the concentration of the pulp.
The first-stage pressure screen 7 and the second-stage pressure screen 11 are used for screening and purifying the pulp and removing the fibers and impurities with larger sizes in the pulp and the white water. The pulp screened by the pressure screen 7 enters a pulse buffer tank 8, pressure pulses generated by pulp feeding of the pulp pump 6 are eliminated, buffered and attenuated, and then the pulp is input into the pulp box 1, so that the stable input flow of the pulp in the pulp box 1 is ensured, and uniform dispersion is ensured. The slag pulp screened by the first-stage pressure screen 7 enters the second-stage pressure screen 11 for screening again, good pulp obtained by the second-stage pressure screen 11 returns to the bending part 32, the recovery rate of fibers is improved, and the slag pulp obtained by the second-stage pressure screen 11 enters a slag pulp pool.
In order to disperse the slurry from the pulse buffer tank 8, a first water outlet is arranged in the middle of the tank body 31 of the off-machine white water tank 3, and white water with lower concentration is pumped from the first water outlet to the dilution water screen 13 through the dilution water screen pump 12 to screen impurities and then flows into the slurry tank 1 to disperse the slurry.
The forming part 2 collects the white water after dehydrating the slurry, and the white water is connected with the white water chute 9 through the water outlet and then enters the white water chute outside the machine through the diversion trench 35. The slope of the white water chute 9 is generally small and the surface area is large, so that certain air bubbles can be eliminated when the white water flows. The diversion trench 35 extends around the top outer wall of the tank body 31 and can be semicircular, and the diversion trench has the functions of delaying the flow velocity of the white water, preventing the white water from rolling, preventing air from entering the white water, and preventing the air of the white water from forming bubbles in the pulp to cause the problem of paper quality. Further, the top of the tank 31 is provided with an air outlet and an observation window. The white water generated in the dehydration operation of the forming part 2 returns to the white water tank 3 outside the machine, and the white water is recycled to reduce the fiber loss and the amount of clear water as much as possible.
Preferably, as shown in fig. 2, an included angle α between a tangent of a central axis of the bending portion 32 and a horizontal plane is 20 to 40 °.
Preferably, the bottom surface of the diversion trench 35 is an inclined surface, and an included angle β between the bottom surface and the horizontal plane is 10 to 30 °.
Preferably, the bottom end of the diversion trench 35 is in communication with the trough body 31 and is provided with an overflow outlet 36, and the overflow outlet 36 is connected to the wire water basin through a pipe, so that surplus white water can enter the wire water basin.
Preferably, the middle part of the tank body 31 is further provided with a second water outlet, and the second water outlet is connected to the water inlet of the second-stage pressure screen pump 10 through a pipeline and is used for adjusting the flow rate entering the second-stage pressure screen 11.
Preferably, the slurry outlet of the secondary pressure screen 11 is connected to a slurry tank.
Preferably, the roughness of the inner wall of the external white water tank 3 and the roughness of the inner wall of the pipeline are both 0.2 to 0.8 μm, and the roughness is reduced by polishing the inner wall, so that the flowing resistance of slurry is reduced, and the influence of the inner wall on the flowing is improved.
The foregoing is directed to one or more embodiments of the present invention, which are described in some detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. A paper machine starching and flow conveying system comprises a head box (1) and a forming part (2) which are connected in sequence, and is characterized in that: the automatic pulp discharging machine further comprises an external white water tank (3), the external white water tank (3) comprises a tapered tank body (31), one end of the tank body (31) with a smaller bottom area faces downwards and is provided with a bent portion (32), the tail end of the bent portion (32) is provided with a pulp outlet (33), the bent portion (32) is further provided with a pulp inlet (34), the outer wall of the top of the tank body (31) is provided with a flow guide groove (35) which surrounds the tank body (31) and is communicated with the tank body (31), and the middle of the tank body (31) is provided with a first water outlet;
a pulp inlet (34) of the bending part (32) is sequentially connected with a pulp inlet pump (4) and a pulp forming pool (5) through a pipeline, a pulp outlet (33) of the bending part (32) is sequentially connected with a fan pump (6) and a first-section pressure screen (7) through a pipeline, a good pulp outlet of the first-section pressure screen (7) is connected to a pulse buffer tank (8) through a pipeline, the pulse buffer tank (8) is connected to a pulp flow box (1) through a pipeline, a water outlet of the forming part (2) is connected to a diversion trench (35) through a white water chute (9), a residue pulp outlet of the first-section pressure screen (7) is sequentially connected with a second-section pressure screen pump (10) and a second-section pressure screen (11) through a pipeline, and a good pulp outlet of the second-section pressure screen (11) is connected to the pulp inlet (34) of the bending part (32) through a pipeline;
a first water outlet of the tank body (31) is sequentially connected with a dilution water sieve pump (12), a dilution water sieve (13) and a head box (1) through pipelines.
2. A paper machine sizing flow system according to claim 1, wherein: the included angle between the tangent of the central axis of the bending part (32) and the horizontal plane is 20 to 40 degrees.
3. A paper machine sizing flow system according to claim 1, wherein: the bottom surface of the diversion trench (35) is an inclined surface, and the included angle between the bottom surface of the diversion trench and the horizontal plane is 10-30 degrees.
4. A paper machine sizing flow system according to claim 3, wherein: the bottom end of the diversion trench (35) is communicated with the trench body (31) and is provided with an overflow port (36), and the overflow port (36) is connected to the net water white pool through a pipeline.
5. A paper machine sizing flow system according to claim 1, wherein: and a second water outlet is also formed in the middle of the tank body (31) and is connected to a water inlet of the two-section pressure screen pump (10) through a pipeline.
6. A paper machine sizing flow system according to claim 1, wherein: and a slurry outlet of the two-stage pressure screen (11) is connected to a slurry pool.
7. A paper machine sizing flow system according to claim 1, wherein: the roughness of the inner wall of the external white water tank (3) and the roughness of the inner wall of the pipeline are both 0.2 to 0.8 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221295549.4U CN217678325U (en) | 2022-05-27 | 2022-05-27 | Paper machine starching and flowing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221295549.4U CN217678325U (en) | 2022-05-27 | 2022-05-27 | Paper machine starching and flowing system |
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| Publication Number | Publication Date |
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| CN217678325U true CN217678325U (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221295549.4U Active CN217678325U (en) | 2022-05-27 | 2022-05-27 | Paper machine starching and flowing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115852730A (en) * | 2022-12-13 | 2023-03-28 | 东莞建晖纸业有限公司 | Five-layer paper machine ash base coating cloth paper type switching bottom layer approach on-line switching process |
-
2022
- 2022-05-27 CN CN202221295549.4U patent/CN217678325U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115852730A (en) * | 2022-12-13 | 2023-03-28 | 东莞建晖纸业有限公司 | Five-layer paper machine ash base coating cloth paper type switching bottom layer approach on-line switching process |
| CN115852730B (en) * | 2022-12-13 | 2024-02-13 | 东莞建晖纸业有限公司 | Online switching process for bottom layer flow of ash base coating paper type switching of five-layer papermaking machine |
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