A high yield pulping system

Abstract

The application relates to a high-yield pulping system which comprises a hydraulic pulper, a low-concentration sand remover and a pressure screen, the hydraulic pulper is provided with a feeding port and a discharging port, the low-concentration sand remover is provided with a pulp inlet and a pulp outlet, the discharging port is communicated with the pulp inlet, the pressure screen is provided with a good pulp outlet and a residue outlet, the pulp outlet is communicated with the good pulp outlet, and the residue outlet is communicated with the feeding port. The pressure screen contains fiber residues which are re-fed into the hydraulic pulper for treatment, the operation is simple, the fine-screened residue pulp is recycled to the hydraulic pulper for circulation disintegration, residue pulp discharge is reduced, fiber loss is reduced, pulp yield is improved, and resource waste is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of papermaking, in particular to a high-yield pulping system. BACKGROUND

[0002] The pulping process in the papermaking production process is particularly important and is the premise of producing paper. In China, the corrugated medium, coated paperboard made of secondary fibers and uncoated paperboard are the main sources of domestic waste paper.

[0003] At present, the fluid slag remover widely used in the papermaking industry is a cyclone type slag remover. The paper pulp containing impurities enters the separation cavity of the slag remover from the tangent direction, and moves downward along the cavity wall in a cyclone motion. Different quality substances are layered in the cavity, and heavy impurities are discharged downward, and good pulp flows out from the upper opening.

[0004] In the process of discharging slag, as the waste paper fibers are repeatedly used for many times, the fibers become shorter and shorter, and a large amount of light slag discharged will cause part of the fibers to be carried out, causing great resource waste. In recent years, in the field of waste paper pulping, the price of raw materials increases, the cost of papermaking increases, and the pulp yield increases, which is an inevitable trend of the development of the papermaking industry. SUMMARY

[0005] In order to reduce resource waste, the present application provides a high-yield pulping system.

[0006] The high-yield pulping system provided by the present application adopts the following technical scheme:

[0007] A high-yield pulping system, comprising a hydraulic pulper, a low-concentration sand remover and a pressure screen, the hydraulic pulper is provided with a feed inlet and a discharge outlet, the low-concentration sand remover is provided with a pulp inlet and a pulp outlet, the discharge outlet is communicated with the pulp inlet, the pressure screen is provided with a good pulp outlet and a residue outlet, the pulp outlet is communicated with the good pulp outlet, and the residue outlet is communicated with the feed inlet.

[0008] By adopting the above technical scheme, the fiber-containing residue of the pressure screen is re-transported into the hydraulic pulper for treatment, which is simple to operate, realizes the recycling of the fine residue pulp to the hydraulic pulper for circulation and disintegration, reduces the discharge of residue pulp, reduces the loss of fibers, improves the yield of pulp, and reduces resource waste.

[0009] Preferably, the low-concentration sand remover comprises a cyclone pipe, the cyclone pipe comprises a separation pipe and a residue discharge pipe, the lower end of the separation pipe is coaxially fixedly connected to the upper end of the residue discharge pipe, the inner diameter of the separation pipe increases away from the residue discharge pipe, the upper end of the separation pipe is provided with a pulp outlet, the outer wall of the separation pipe is provided with a pulp inlet, the outer wall of the residue discharge pipe is provided with a backflushing port, and the lower end of the residue discharge pipe is provided with a residue discharge port.

[0010] By using the above technical scheme, the white water is introduced into the cyclone tube from the backflushing port to backflush the accumulated residue in the cyclone tube, the water pressure reaches 350kPa, the water pressure is used to separate the fiber entrained in the residue slurry, and the fiber is further floated and discharged from the pulp outlet, which is simple to operate, reduces fiber loss, improves pulp yield, and reduces resource waste.

[0011] Preferably, the low-concentration sand remover further comprises a pulp inlet pipe, a pulp inlet valve, a backflushing pipe and a backflushing valve, the pulp inlet pipe is communicated with the pulp inlet port, the pulp inlet valve is connected to the pulp inlet pipe, the backflushing pipe is communicated with the backflushing port, and the backflushing valve is connected to the backflushing pipe.

[0012] By using the above technical scheme, the pulp inlet valve controls the opening and closing of the pulp inlet pipe, and the backflushing valve controls the opening and closing of the backflushing pipe, when the pulp inlet valve is opened and the backflushing valve is closed, the pulp enters the separation pipe for separation, and when the residue accumulates to a certain amount, the pulp inlet valve is closed and the backflushing valve is opened, the white water enters to impact the residue, which is convenient to control, reduces fiber loss, improves pulp yield, and reduces resource waste.

[0013] Preferably, it further comprises a mounting frame, a rotating rod, a third synchronous wheel, a fourth synchronous wheel, a fifth synchronous wheel, a sixth synchronous wheel, a second synchronous belt and a third synchronous belt, the mounting frame is fixedly connected to the ground, the rotating rod is rotatably connected to the mounting frame, the rotating axis of the rotating rod is vertical, the pulp inlet valve and the backflushing valve are both ball valves, the pulp inlet valve is rotatably connected to the pulp inlet pipe, the backflushing valve is rotatably connected to the backflushing pipe, the rotating axes of the pulp inlet valve and the backflushing valve are both vertical, the third synchronous wheel and the fourth synchronous wheel are coaxially fixedly connected to the rotating rod, the fifth synchronous wheel is coaxially fixedly connected to the valve rod of the pulp inlet valve, the sixth synchronous wheel is coaxially fixedly connected to the valve rod of the backflushing valve, the second synchronous belt is sleeved on the outer periphery of the third synchronous wheel and the fifth synchronous wheel, and the third synchronous belt is sleeved on the outer periphery of the fourth synchronous wheel and the sixth synchronous wheel.

[0014] By using the above technical scheme, the synchronous belt and the synchronous wheel control the opening and closing of the pulp inlet valve and the backflushing valve, so that the pulp inlet valve is opened and the backflushing valve is closed at the same time, which is simple to operate and improves work efficiency.

[0015] Preferably, it further comprises an auger and a residue receiving box, the low-concentration sand remover further comprises a residue conveying pipe, the outer wall of the residue conveying pipe is connected to the lower end of the residue discharging pipe, the residue conveying pipe is provided with a residue conveying cavity, the residue discharging port is communicated with the residue conveying cavity, the auger is coaxially rotatably connected to the inner wall of the conveying cavity, the lower end of the residue conveying pipe is provided with a residue discharging port, the residue receiving box is connected to the mounting frame, the upper end of the residue receiving box is provided with a residue receiving port, and the residue discharging port is opposite to the residue receiving port.

[0016] By adopting the technical scheme, the slag discharged from the slag outlet falls into the slag conveying cavity, the auger conveys the slag, the slag accumulation in the slag conveying pipe is reduced to prevent the pipe from being blocked, and the slag can be conveniently conveyed to a designated position for discharge.

[0017] Preferably, the device further comprises a receiving box, a first spring, a first connecting rod, a rack, a rotating shaft, a gear, a first bevel gear and a second bevel gear, an outer wall of the receiving box is fixedly connected to the mounting frame, an upper end of the receiving box is provided with a receiving groove, the outer wall of the receiving box is slidably embedded in the receiving groove, one end of the first spring is fixedly connected to a groove bottom of the receiving groove, the other end of the first spring is fixedly connected to a lower end of the receiving box, the outer wall of the receiving box is provided with a receiving opening, the outer wall of the receiving box close to the receiving opening is provided with a receiving port, one end of the receiving box away from the receiving port is provided with a first sliding port, the first connecting rod is slidably connected to the inner wall of the first sliding port, when the slag in the receiving box is accumulated to a certain amount, the first spring is contracted, the receiving opening and the receiving port are communicated, the first connecting rod abuts against the upper end of the receiving box, the first connecting rod is connected to the rack, the rotating shaft is rotatably connected to the mounting frame, the gear and the first bevel gear are coaxially and fixedly connected to the outer periphery of the rotating shaft, the gear is engaged with the rack, the second bevel gear is coaxially and fixedly connected to the lower end of the rotating rod, and the first bevel gear is engaged with the second bevel gear.

[0018] By adopting the technical scheme, when the slag in the receiving box is accumulated to a certain amount, the first spring is contracted, the receiving box slides downward, the first connecting rod slides to abut against the receiving box so that the receiving box cannot move upward, at this time, the rack slides to drive the gear to rotate, the rotating rod rotates to close the pulp inlet valve, the backflush valve is opened, the driving motor is closed, the receiving opening and the receiving port are communicated to discharge the slag, the slag is backflushed during the discharging, when the discharging is completed, the first connecting rod is controlled to slide so that the receiving box is reset, the pulp inlet valve is opened, the backflush valve is closed, the driving motor is opened, the operation is simple, a certain amount of slag is continuously treated, the fiber loss is reduced, the pulp yield is improved, and the resource waste is reduced.

[0019] Preferably, the slag discharge box, the sliding plate, the second spring, the rotating plate, the second connecting rod and the third spring are further included, the slag discharge box is fixedly connected to the mounting frame, the upper end of the slag discharge box is provided with a slag discharge groove, the sliding plate is slidably embedded in the slag discharge groove, the slag discharged from the receiving port falls into the slag discharge groove, one end of the second spring is fixedly connected to the bottom of the slag discharge groove, the other end of the second spring is fixedly connected to the lower end of the sliding plate, the end of the slag discharge box away from the receiving box is provided with a slag discharge port, the rotating plate is rotatably connected to the slag discharge box and used for covering the slag discharge port, the end of the slag discharge box away from the slag discharge port is provided with a second sliding port, the second connecting rod is slidably connected to the second sliding port, the end of the first connecting rod away from the slag discharge box is fixedly connected to the end of the second connecting rod away from the slag discharge box, one end of the third spring is fixedly connected to the mounting frame, the other end of the third spring is fixedly connected to the second connecting rod, when the slag accumulated on the sliding plate reaches a certain amount, the second spring is contracted, the sliding plate abuts against the end of the second connecting rod to push the second connecting rod out of the slag discharge groove, the third spring is contracted to drive the first connecting rod to slide, and the rotating plate is rotated to make the slag discharged out of the slag discharge box.

[0020] By adopting the technical scheme, when the slag in the slag receiving box is all discharged into the slag discharge groove, the second spring is contracted, the second connecting rod slides, the third spring is contracted, the first connecting rod slides, the slag receiving box is reset, the rack slides, and the gear is rotated, so that the pulp inlet valve is automatically opened, the backflush valve is closed, and the driving motor is opened, thereby achieving simple operation, continuously processing a certain amount of slag, reducing fiber loss, improving pulp yield, and reducing resource waste.

[0021] Preferably, the plurality of cyclone pipes are uniformly and spacedly arranged along the length direction of the slag conveying pipe.

[0022] By adopting the technical scheme, the plurality of cyclone pipes improve the processing efficiency of the pulp.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The pressure screen contains fiber scraps which are re-transported into the hydro-pulper for processing, thereby achieving simple operation, recycling and disintegrating the fine-screened slag and pulp back to the hydro-pulper, reducing slag and pulp discharge, reducing fiber loss, improving pulp yield, and reducing resource waste;

[0025] 2. White water is introduced into the cyclone pipe from the backflush port to backflush the accumulated slag in the cyclone pipe, the water pressure reaches 350 kPa, the fiber in the slag and pulp is separated by the water pressure, and the fiber is further floated out of the pulp outlet, thereby achieving simple operation, reducing fiber loss, improving pulp yield, and reducing resource waste;

[0026] 3. After a certain amount of slag falls into the slag box, the first spring contracts, the slag box slides down, the first connecting rod slides to abut the slag box so that the slag box cannot move up, at this time the rack slides to drive the gear to rotate so that the rotating rod rotates to close the pulp inlet valve, the backflush valve opens, the drive motor closes, the slag port communicates with the material port for discharging, and the slag is backflushed during discharging, when the discharging is completed, the first connecting rod slides to reset the slag box, the pulp inlet valve opens, the backflush valve closes, and the drive motor opens, which is simple to operate, continuously processes a certain amount of slag, reduces fiber loss, improves pulp yield, and reduces resource waste. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of a high yield pulping system.

[0028] Figure 2 is a schematic diagram of the overall structure of a high yield pulping system, mainly used to show the inlet, outlet, outlet pipe, pressure screen and conveying pipe.

[0029] Figure 3 is a schematic diagram of the overall structure of a low-concentration sand remover, drive assembly, material receiving assembly and control assembly, mainly used to show the low-concentration sand remover and control assembly.

[0030] Figure 4 is a schematic diagram of the overall structure of a low-concentration sand remover, drive assembly, material receiving assembly and control assembly, mainly used to show the material receiving assembly.

[0031] Figure 5 is a sectional view of a low-concentration sand remover, drive assembly, material receiving assembly and control assembly.

[0032] Figure 6 is Figure 4 is an enlarged view of A in

[0033] Figure 7 is a schematic diagram of the overall structure of a slag box, a first spring, a first connecting rod, a sliding plate, a second spring, a rotating plate, a hinge shaft, a second connecting rod, a connecting rod, a third spring, a rack, a gear, a rotating shaft, a first synchronous pulley, a second synchronous pulley and a first synchronous belt.

[0034] Figure 8 is Figure 2 is an enlarged view of B in

[0035] Figure 9 is Figure 3 is an enlarged view of C in

[0036] Explanation of reference signs: 1, hydraulic pulper; 11, feeding port; 12, slag discharge port; 13, discharge port; 2, high-concentration sand remover; 21, pulp inlet; 22, sand outlet; 23, pulp discharge port; 3, low-concentration sand remover; 31, support; 32, feeding pipe; 33, water inlet pipe; 34, pulp outlet pipe; 35, slag conveying pipe; 351, slag conveying cavity; 352, slag leakage port; 36, cyclone pipe; 361, separation pipe; 3611, separation cavity; 3612, pulp inlet; 3613, pulp outlet; 362, slag discharge pipe; 3621, slag discharge cavity; 3622, backflushing port; 3623, slag discharge port; 37, pulp inlet pipe; 38, backflushing pipe; 391, pulp inlet valve; 392, backflushing valve; 4, driving assembly; 41, driving motor; 42, auger; 5, receiving assembly; 51, mounting bracket; 511, mounting seat; 512, mounting plate; 52, receiving box; 521, receiving groove; 53, receiving box; 531, receiving groove; 532, receiving port; 533, first sliding port; 54, slag discharging box; 541, slag discharging groove; 542, slag discharging port; 543, second sliding port; 55, slag receiving box; 551, slag receiving groove; 552, slag receiving port; 561, first spring; 562, first connecting rod; 563, sliding plate; 564, second spring; 565, rotating plate; 566, hinged shaft; 567, second connecting rod; 5671, guide surface; 568, connecting rod; 569, third spring; 57, mounting block; 6, control assembly; 611, rack; 612, gear; 62, rotating shaft; 631, first synchronous wheel; 632, second synchronous wheel; 633, first synchronous belt; 64, fixed block; 65, rotating rod; 661, first bevel gear; 662, second bevel gear; 671, third synchronous wheel; 672, fourth synchronous wheel; 673, fifth synchronous wheel; 674, sixth synchronous wheel; 675, second synchronous belt; 676, third synchronous belt; 7, pressure screen; 71, good pulp port; 72, residue port; 8, conveying pipe. DETAILED DESCRIPTION

[0037] The following will be described in detail with reference to the accompanying drawings. Figures 1-9 The present application is further described in detail.

[0038] The present application discloses a high-yield pulping system. Referring to Figure 1 The high-yield pulping system comprises a hydraulic pulper 1, a high-concentration sand remover 2, a low-concentration sand remover 3, a driving assembly 4, a receiving assembly 5, a control assembly 6, a pressure screen 7, and a conveying pipe 8.

[0039] Referring to Figure 1 and Figure 2The upper end of the hydraulic pulper 1 is provided with a feeding port 11, the lower end of the hydraulic pulper 1 is provided with a slag discharge port 12 and a discharging port 13, and the slag discharge port 12 and the discharging port 13 are respectively arranged at the two ends of the hydraulic pulper 1. The outer wall of the high-concentration sand remover 2 is provided with a pulp inlet port 21, the lower end of the high-concentration sand remover 2 is provided with a sand discharge port 22, and the upper end of the high-concentration sand remover 2 is provided with a pulp discharge port 23. The slag discharge port 12 and the sand discharge port 22 are both used for discharging slag, and the discharging port 13 is communicated with the pulp inlet port 21.

[0040] With reference to Figure 3 and Figure 4 , the low-concentration sand remover 3 comprises a support 31, a feeding pipe 32, a water inlet pipe 33, a pulp outlet pipe 34, a slag conveying pipe 35, a cyclone pipe 36, a pulp inlet pipe 37, a pulp inlet valve 391, a backflush pipe 38 and a backflush valve 392.

[0041] With reference to Figure 3 , the support 31 is provided with two, the lower ends of the two supports 31 are fixedly connected to the ground, the outer walls of the two ends of the feeding pipe 32 are respectively fixedly connected to the two supports 31, the outer walls of the two ends of the water inlet pipe 33 are respectively fixedly connected to the two supports 31, and the outer walls of the two ends of the pulp outlet pipe 34 are respectively fixedly connected to the two supports 31.

[0042] With reference to Figure 1 and Figure 4 , one end of the slag conveying pipe 35 is fixedly connected to the support 31 close to the high-concentration sand remover 2.

[0043] With reference to Figure 3 and Figure 4 , the axes of the feeding pipe 32, the water inlet pipe 33, the pulp outlet pipe 34 and the slag conveying pipe 35 are all parallel to each other, the axis of the feeding pipe 32 is horizontal, the height of the feeding pipe 32 is greater than the height of the water inlet pipe 33, the height of the water inlet pipe 33 is greater than the height of the slag conveying pipe 35, and the height of the pulp outlet pipe 34 is greater than the height of the feeding pipe 32.

[0044] With reference to Figure 1 and Figure 3 , one end of the feeding pipe 32 is communicated with the pulp discharge port 23, the other end of the feeding pipe 32 is blocked, one end of the water inlet pipe 33 is used for being communicated with a water tank for providing white water, the other end of the water inlet pipe 33 is blocked, one end of the pulp outlet pipe 34 is blocked, and the two ends of the slag conveying pipe 35 are both blocked.

[0045] With reference to Figure 3 and Figure 5The cyclone tube 36 includes a separation tube 361 and a slag discharge tube 362. There are five cyclone tubes 36, which are evenly spaced along the length of the feed tube 32. The upper end of the slag discharge tube 362 is coaxially fixed to the lower end of the separation tube 361. The axis of the slag discharge tube 362 is vertical. The separation tube 361 is provided with a separation chamber 3611, and the slag discharge tube 362 is provided with a slag discharge chamber 3621. The inner diameter of the separation chamber 3611 increases as it moves away from the slag discharge chamber 3621. The separation chamber 3611 and the slag discharge chamber 3621 transition smoothly.

[0046] The outer wall of the separation tube 361 is provided with a slurry inlet 3612, and the upper end of the separation tube 361 is coaxially provided with a slurry outlet 3613. The outer wall of the slurry outlet tube 34 is connected to the slurry outlet 3613. One end of the slurry inlet tube 37 is connected to the feed tube 32, and the other end of the slurry inlet tube 37 is connected to the slurry inlet 3612. The slurry inlet tube 37 allows the slurry to enter along the tangential direction of the separation chamber 3611. The slurry inlet valve 391 is a ball valve. The slurry inlet valve 391 is rotatably connected to the slurry inlet tube 37. The rotation axis of the slurry inlet valve 391 is vertical. There are five slurry inlet tubes 37. The five slurry inlet tubes 37 are evenly spaced along the length of the feed tube 32 and are connected to the five slurry inlets 3612 one by one.

[0047] The upper end of the slag discharge pipe 362 is provided with a backflushing port 3622 on its outer wall, and the lower end of the slag discharge pipe 362 is provided with a slag discharge port 3623 coaxially. One end of the backflushing pipe 38 is connected to the water inlet pipe 33, and the other end of the backflushing pipe 38 is connected to the backflushing port 3622. All backflushing valves 392 are ball valves. The backflushing valves 392 are rotatably connected to the backflushing pipes 38. The rotation axis of the backflushing valves 392 is vertical. There are five backflushing pipes 38. The five backflushing pipes 38 are evenly spaced along the length of the water inlet pipe 33 and are connected to the five backflushing ports 3622 one by one.

[0048] Reference Figure 5 The drive assembly 4 includes a drive motor 41 and an auger 42. The slag conveying pipe 35 is provided with a slag conveying chamber 351, which is cylindrical. The axis of the slag conveying chamber 351 is collinear with the axis of the slag conveying pipe 35. The motor housing of the drive motor 41 is fixedly connected to one end of the slag conveying pipe 35. The auger 42 is coaxially disposed in the slag conveying chamber 351. Both ends of the auger 42 are coaxially rotatably connected to the inner wall of the slag conveying chamber 351. The motor shaft of the drive motor 41 is coaxially fixedly connected to one end of the auger 42.

[0049] The outer wall of the slag conveying pipe 35 is connected to the lower end of the slag discharge pipe 362. The slag discharge port 3623 is connected to the slag conveying chamber 351. The lower end of the slag conveying pipe 35 is provided with a slag leakage port 352, which is connected to the slag conveying chamber 351. There are five slag leakage ports 352, which are evenly spaced along the axial direction of the slag conveying pipe 35. The slag leakage ports 352 are arranged one-to-one with the slag discharge port 3623. The slag leakage ports 352 are located on the side of the slag discharge port 3623 away from the drive motor 41.

[0050] Referring to Figure 6 and Figure 7 , the receiving assembly 5 comprises a mounting frame 51, a receiving box 52, a receiving box 53, a slag discharge box 54, a slag receiving box 55, a first spring 561, a first connecting rod 562, a sliding plate 563, a second spring 564, a rotating plate 565, a hinge shaft 566, a second connecting rod 567, a connecting rod 568, a mounting block 57 and a third spring 569.

[0051] Referring to Figure 4 , the mounting frame 51 comprises a mounting seat 511 and a mounting plate 512, the lower end of the mounting seat 511 is fixedly connected to the ground, one side of the mounting plate 512 is fixedly connected to the side wall of the mounting seat 511, the length direction of the mounting plate 512 is parallel to the length direction of the mounting seat 511, the lower end of the receiving box 52 is fixedly connected to the upper end of the mounting seat 511, the side wall of the receiving box 52 is fixedly connected to one end of the mounting plate 512 towards the mounting seat 511, the upper end of the receiving box 52 is provided with a receiving groove 521, the outer wall of the receiving box 53 and the outer wall of the slag discharge box 54 are both fixedly connected to one end of the mounting plate 512 towards the mounting seat 511, and the receiving box 53 and the slag discharge box 54 are both arranged above the receiving box 52.

[0052] Referring to Figure 6 and Figure 8 , the upper end of the receiving box 53 is provided with a receiving groove 531, and the receiving box 53 is provided with five receiving grooves 531, the five receiving grooves 531 are arranged one by one opposite to the five slag discharge ports 352, the outer wall of the receiving box 53 towards the slag discharge box 54 is provided with a receiving port 532, the upper end of the slag discharge box 54 is provided with a slag discharge groove 541, and the slag discharge box 54 is provided with five slag discharge grooves 541, the five slag discharge grooves 541 are arranged one by one corresponding to the five receiving ports 532, and the slag material falling from the receiving port 532 falls into the slag discharge groove 541.

[0053] Referring to Figure 6 and Figure 7 , the outer wall of the slag receiving box 55 is slidingly embedded in the receiving groove 531, the sliding direction of the slag receiving box 55 is vertical, one end of the first spring 561 is fixedly connected to the lower end of the slag receiving box 55, the other end of the first spring 561 is fixedly connected to the groove bottom of the receiving groove 531, the upper end of the slag receiving box 55 is provided with a slag receiving groove 551, the slag receiving groove 551 is arranged opposite to the slag discharge port 352, for receiving the slag material falling from the slag discharge port 352, and one end of the slag receiving box 55 towards the slag discharge box 54 is provided with a slag receiving port 552.

[0054] Referring to Figure 7 and Figure 8 , when the slag receiving port 552 is communicated with the receiving port 532, the slag material is discharged into the slag discharge groove 541, and the height of the groove bottom of the slag receiving groove 551 increases away from the slag receiving port 552.

[0055] Referring to Figure 6 andFigure 7 The first sliding port 533 is arranged at the end of the slag receiving box 53 away from the slag discharging box 54, and the first connecting rod 562 is slidably arranged in the first sliding port 533. The sliding direction of the first connecting rod 562 is horizontal.

[0056] Referring to Figure 7 and Figure 8 When the first spring 561 is contracted to make the slag receiving port 552 communicate with the material receiving port 532, the first connecting rod 562 slides into the material receiving groove 531 and abuts against the upper end of the slag receiving box 55.

[0057] The outer periphery of the sliding plate 563 is slidably connected to the inner periphery of the slag discharging groove 541, and the sliding direction of the sliding plate 563 is vertical. One end of the second spring 564 is fixedly connected to the lower end of the sliding plate 563, and the other end of the second spring 564 is fixedly connected to the groove bottom of the slag discharging groove 541. The slag discharging box 54 is provided with a slag discharging port 542 at the end away from the material receiving box 53. The height of the upper end of the sliding plate 563 increases away from the slag discharging port 542. The slag falls into the receiving groove 521 from the slag discharging port 542. The rotating plate 565 is fixedly connected to the outer wall of the hinge shaft 566, and the hinge shaft 566 is hingedly connected to the slag discharging box 54. The axis of the hinge shaft 566 is perpendicular to the mounting plate 512. The rotating plate 565 is used to cover the slag discharging port 542, and the hinge shaft 566 penetrates the mounting plate 512.

[0058] Referring to Figure 6 and Figure 8 The second sliding port 543 is arranged at the end of the slag discharging box 54 away from the slag discharging port 542, and the second connecting rod 567 is slidably arranged in the second sliding port 543. The sliding direction of the second connecting rod 567 is horizontal. The end of the second connecting rod 567 extending into the slag discharging groove 541 is provided with a guide surface 5671 at the end away from the groove bottom of the slag discharging groove 541.

[0059] Referring to Figure 6 and Figure 7 When the second spring 564 is contracted, the lower end of the sliding plate 563 abuts against the guide surface 5671 to push the second connecting rod 567 to slide. The rotating plate 565 rotates, and the slag discharging port 542 is opened.

[0060] Referring to Figure 6 One end of the connecting rod 568 is fixedly connected to the end of the first connecting rod 562 away from the material receiving box 53, and the other end of the connecting rod 568 is fixedly connected to the end of the second connecting rod 567 away from the slag discharging box 54. The mounting block 57 is fixedly connected to the end of the mounting plate 512 facing the receiving box 52. The mounting block 57 is arranged at the side of the connecting rod 568 away from the material receiving box 53. One end of the third spring 569 is fixedly connected to the end of the mounting block 57 facing the material receiving box 53, and the other end of the third spring 569 is fixedly connected to the connecting rod 568.

[0061] Referring to Figure 3 and Figure 7The control assembly 6 comprises a rack 611, a rotating shaft 62, a gear 612, a first synchronous wheel 631, a second synchronous wheel 632, a first synchronous belt 633, a fixed block 64, a rotating rod 65, a first bevel gear 661, a second bevel gear 662, a third synchronous wheel 671, a fourth synchronous wheel 672, a fifth synchronous wheel 673, a sixth synchronous wheel 674, a second synchronous belt 675 and a third synchronous belt 676.

[0062] With reference to Figure 6 and Figure 7 The rack 611 is fixedly connected to the upper end of the second connecting rod 567, the rotating shaft 62 is coaxially and rotatably connected to the mounting plate 512, the rotating axis of the rotating shaft 62 is perpendicular to the mounting plate 512, the gear 612 is coaxially and fixedly connected to the first rotating shaft 62, the gear 612 is arranged on the side of the mounting plate 512 facing the receiving box 53, and the gear 612 is engaged with the rack 611. The first synchronous wheel 631 is coaxially and fixedly connected to the outer periphery of the rotating shaft 62, the second synchronous wheel 632 is coaxially and fixedly connected to the outer periphery of the hinged shaft 566, the first synchronous wheel 631 and the second synchronous wheel 632 are arranged on the side of the mounting plate 512 away from the receiving box 53, and the first synchronous belt 633 is sleeved on the outer peripheries of the first synchronous wheel 631 and the second synchronous wheel 632.

[0063] With reference to Figure 9 The fixed block 64 is fixedly connected to the end of the mounting plate 512 away from the receiving box 53, the fixed block 64 is arranged above the rotating shaft 62, the rotating rod 65 penetrates through the fixed block 64 and is coaxially and rotatably connected to the fixed block 64, the rotating axis of the rotating rod 65 is vertical, the first bevel gear 661 is coaxially and fixedly connected to one end of the rotating shaft 62, the first bevel gear 661 is arranged on the side of the first synchronous wheel 631 away from the mounting plate 512, the second bevel gear 662 is coaxially and fixedly connected to the lower end of the rotating rod 65, and the first bevel gear 661 is engaged with the second bevel gear 662.

[0064] With reference to Figure 3 The third synchronous wheel 671 and the fourth synchronous wheel 672 are coaxially and fixedly connected to the rotating rod 65, the fifth synchronous wheel 673 is coaxially and fixedly connected to the outer periphery of the valve rod of the pulp feeding valve 391, the sixth synchronous wheel 674 is coaxially and fixedly connected to the outer periphery of the valve rod of the backflushing valve 392, the height of the third synchronous wheel 671 is equal to the height of the fifth synchronous wheel 673, the height of the fourth synchronous wheel 672 is equal to the height of the sixth synchronous wheel 674, the second synchronous belt 675 is sleeved on the outer peripheries of the third synchronous wheel 671 and the fifth synchronous wheel 673, and the third synchronous belt 676 is sleeved on the outer peripheries of the fourth synchronous wheel 672 and the sixth synchronous wheel 674.

[0065] With reference to Figure 2The pressure screen 7 is provided with three, the pressure screen 7 is provided with a good pulp port 71, the far end of the pulp pipe 34 from the cyclone pipe 36 is communicated with the good pulp port 71 of the first pressure screen 7, the three pressure screens 7 are connected in sequence to treat the pulp, the third pressure screen 7 is provided with a residue port 72, one end of the conveying pipe 8 is communicated with the residue port 72, and the other end of the conveying pipe 8 is communicated with the feeding port 11.

[0066] The implementation principle of the high-yield pulping system is as follows: after the pulp passes through the hydraulic pulper 1, the high-concentration sand remover 2, the low-concentration sand remover 3 and the pressure screen 7 in sequence, the refined pulp is used for papermaking, the residue generated by the third pressure screen 7 enters the feeding port 11 together with the pulp, the feeding valve 391 is opened, the backflush valve 392 is closed, the pulp enters the separation cavity 3611 from the feeding pipe 37 for cyclone separation, the residue is discharged from the residue outlet 3623, the raw pulp is discharged from the pulp outlet 3613, the speed of the residue is greater than the speed of the residue discharge of the residue outlet 3623, the driving motor 41 drives the auger 42 to rotate to make the residue fall into the residue receiving groove 551, when the residue accumulates to a certain amount, the first spring 561 contracts, the third spring 569 pushes the first connecting rod 562 to slide to make the first connecting rod 562 abut against the upper end of the residue receiving tank 55, the second connecting rod 567 is synchronously slid under the influence of the connecting rod 568 to drive the rack 611 to slide, the gear 612 rotates, the rotating shaft 62 rotates, the first bevel gear 661 and the second bevel gear 662 rotate, the rotating rod 65 rotates, the feeding valve 391 is closed, the backflush valve 392 is opened, and the white water backflushes the residue accumulated on the upper end of the residue outlet 3623 to make the fibers contained in the residue float up. At this time, the driving motor 41 is closed, the residue receiving port 552 is communicated with the material receiving port 532, the residue is discharged into the residue discharging groove 541, and when the residue discharging groove 551 is discharged, the second spring 564 contracts to push the second connecting rod 567 to slide, so that the rack 611 is reset, the first connecting rod 562 is reset, the first spring 561 restores the deformation, the material receiving tank 53 is reset, the feeding valve 391 is opened, and the backflush valve 392 is closed. At this time, the driving motor 41 is opened, the first synchronous wheel 631 and the second synchronous wheel 632 rotate, the hinged shaft 566 rotates, the residue discharging port 542 is opened, and the residue in the residue discharging tank 54 starts to be discharged to the receiving groove 521. In the next time, when the residue in the residue receiving groove 551 accumulates to a certain amount, the first connecting rod 562 slides, the hinged shaft 566 rotates to make the rotating plate 565 close the residue discharging port 542, and the operation is simple and convenient, and the residue is backflushed in a cycle.

[0067] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high yield pulping system characterized by: The application relates to a papermaking system, which comprises a hydraulic pulper (1), a low-concentration sand remover (3) and a pressure screen (7), the hydraulic pulper (1) is provided with a feeding port (11) and a discharging port (13), the low-concentration sand remover (3) is provided with a pulp inlet (3612) and a pulp outlet (3613), the discharging port (13) is communicated with the pulp inlet (3612), the pressure screen (7) is provided with a good pulp outlet (71) and a residue outlet (72), the pulp outlet (3613) is communicated with the good pulp outlet (71), and the residue outlet (72) is communicated with the feeding port (11). The low-concentration sand remover (3) comprises a cyclone tube (36), the cyclone tube (36) comprises a separation tube (361) and a residue discharging tube (362), the lower end of the separation tube (361) is coaxially fixedly connected to the upper end of the residue discharging tube (362), the inner diameter of the separation tube (361) increases with the distance from the residue discharging tube (362), the upper end of the separation tube (361) is provided with the pulp outlet (3613), the outer wall of the separation tube (361) is provided with the pulp inlet (3612), the outer wall of the residue discharging tube (362) is provided with a backflushing port (3622), and the lower end of the residue discharging tube (362) is provided with a residue discharging port (3623). The low-concentration sand remover (3) further comprises a pulp inlet pipe (37), a pulp inlet valve (391), a backflushing pipe (38) and a backflushing valve (392), the pulp inlet pipe (37) is communicated with the pulp inlet (3612), the pulp inlet valve (391) is connected to the pulp inlet pipe (37), the backflushing pipe (38) is communicated with the backflushing port (3622), and the backflushing valve (392) is connected to the backflushing pipe (38). The application further comprises a mounting frame (51), a rotating rod (65), a third synchronous wheel (671), a fourth synchronous wheel (672), a fifth synchronous wheel (673), a sixth synchronous wheel (674), a second synchronous belt (675) and a third synchronous belt (676), the mounting frame (51) is fixedly connected to the ground, the rotating rod (65) is rotationally connected to the mounting frame (51), the rotating axis of the rotating rod (65) is vertical, the pulp inlet valve (391) and the backflushing valve (392) are both ball valves, the pulp inlet valve (391) is rotationally connected to the pulp inlet pipe (37), the backflushing valve (392) is rotationally connected to the backflushing pipe (38), the rotating axes of the pulp inlet valve (391) and the backflushing valve (392) are both vertical, the third synchronous wheel (671) and the fourth synchronous wheel (672) are both coaxially fixedly connected to the rotating rod (65), the fifth synchronous wheel (673) is coaxially fixedly connected to the valve rod of the pulp inlet valve (391), the sixth synchronous wheel (674) is coaxially fixedly connected to the valve rod of the backflushing valve (392), the second synchronous belt (675) is sleeved on the outer periphery of the third synchronous wheel (671) and the fifth synchronous wheel (673), and the third synchronous belt (676) is sleeved on the outer periphery of the fourth synchronous wheel (672) and the sixth synchronous wheel (674).

2. A high yield pulping system according to claim 1, characterized in that The low-concentration desander (3) further comprises a screw (42) and a slag receiving box (55), the slag conveying pipe (35) is connected to the lower end of the slag outlet pipe (362), the slag conveying pipe (35) is provided with a slag conveying cavity (351), the slag outlet (3623) is communicated with the slag conveying cavity (351), the screw (42) is coaxially and rotationally connected to the inner wall of the conveying cavity, the lower end of the slag conveying pipe (35) is provided with a slag leakage opening (352), the slag receiving box (55) is connected to the mounting frame (51), the upper end of the slag receiving box (55) is provided with a slag receiving opening (552), and the slag leakage opening (352) is opposite to the slag receiving opening (552).

3. A high yield pulping system according to claim 2, characterized in that The low-concentration desander (3) further comprises a slag receiving box (55), the slag receiving box (55) is connected to the mounting frame (51), the upper end of the slag receiving box (55) is provided with a slag receiving opening (552), the lower end of the slag conveying pipe (35) is provided with a slag leakage opening (352), the slag leakage opening (352) is opposite to the slag receiving opening (552), the slag receiving box (55) is slidably embedded in the receiving groove (531), one end of the first spring (561) is fixedly connected to the bottom of the slag receiving groove (551), the other end of the first spring (561) is fixedly connected to the lower end of the slag receiving box (55), the outer wall of the slag receiving box (55) is provided with the slag receiving opening (552), the outer wall of the receiving box (53) close to the slag receiving opening (552) is provided with a receiving opening (532), one end of the receiving box (53) away from the receiving opening (532) is provided with a first sliding opening (533), the first connecting rod (562) is slidably connected to the inner wall of the first sliding opening (533), when the slag in the slag receiving box (55) is accumulated to a certain amount, the first spring (561) is contracted, the slag receiving opening (552) is communicated with the receiving opening (532), the first connecting rod (562) abuts against the upper end of the slag receiving box (55), the first connecting rod (562) is connected to the rack (611), the rotating shaft (62) is rotationally connected to the mounting frame (51), the gear (612) and the first bevel gear (661) are coaxially and fixedly connected to the outer periphery of the rotating shaft (62), the gear (612) is engaged with the rack (611), and the second bevel gear (662) is coaxially and fixedly connected to the lower end of the rotating rod (65).

4. A high yield pulping system according to claim 3, characterized in that The slag discharging box (54) is fixedly connected to the mounting frame (51), the upper end of the slag discharging box (54) is provided with a slag discharging groove (541), the sliding plate (563) is slidably embedded in the slag discharging groove (541), the slag discharged from the material receiving opening (532) falls into the slag discharging groove (541), one end of the second spring (564) is fixedly connected to the groove bottom of the slag discharging groove (541), the other end of the second spring (564) is fixedly connected to the lower end of the sliding plate (563), the end of the slag discharging box (54) away from the material receiving box (53) is provided with a slag discharging opening (542), the rotating plate (565) is rotatably connected to the slag discharging box (54) and is used for covering the slag discharging opening (542), the end of the slag discharging box (54) away from the slag discharging opening (542) is provided with a second sliding opening (543), the second connecting rod (567) is slidably connected to the second sliding opening (543), the end of the first connecting rod (562) away from the slag discharging box (54) is fixedly connected to the end of the second connecting rod (567) away from the slag discharging box (54), one end of the third spring (569) is fixedly connected to the mounting frame (51), the other end of the third spring (569) is fixedly connected to the second connecting rod (567), when the slag on the sliding plate (563) accumulates to a certain amount, the second spring (564) contracts, the sliding plate (563) abuts against the end of the second connecting rod (567) to push the second connecting rod (567) out of the slag discharging groove (541), the third spring (569) contracts to drive the first connecting rod (562) to slide, and the rotating plate (565) rotates to make the slag discharge out of the slag discharging box (54).

5. A high yield pulping system according to claim 4, characterized in that The cyclone pipes (36) are provided in plurality, and the plurality of cyclone pipes (36) are uniformly and spacedly arranged along the length direction of the slag conveying pipe (35).

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