CN220520964U - Pulping screening system - Google Patents
Pulping screening system Download PDFInfo
- Publication number
- CN220520964U CN220520964U CN202321712373.2U CN202321712373U CN220520964U CN 220520964 U CN220520964 U CN 220520964U CN 202321712373 U CN202321712373 U CN 202321712373U CN 220520964 U CN220520964 U CN 220520964U
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- pulp
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- fine screening
- fine
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- 238000012216 screening Methods 0.000 title claims abstract description 155
- 238000004537 pulping Methods 0.000 title claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 25
- 238000010790 dilution Methods 0.000 claims abstract description 19
- 239000012895 dilution Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims description 32
- 239000002893 slag Substances 0.000 claims description 21
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims description 15
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 12
- 241001330002 Bambuseae Species 0.000 claims description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 12
- 239000011425 bamboo Substances 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 12
- 229920001131 Pulp (paper) Polymers 0.000 claims description 8
- 238000010025 steaming Methods 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 17
- 239000012535 impurity Substances 0.000 description 16
- 239000007788 liquid Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
The utility model relates to the field of pulping screening, and discloses a pulping screening system which comprises a fine screening system, wherein the fine screening system comprises a first section of fine screening equipment, a sand remover, a second section of fine screening equipment, a third section of fine screening equipment and a dilution vertical pipe, wherein the first section of fine pulp screened by the first section of fine screening equipment enters a next procedure, the first section of tail pulp screened by the first section of fine screening equipment enters the sand remover, the fine pulp screened by the sand remover enters a second section of fine screening equipment, the second section of fine pulp screened by the second section of fine screening equipment enters the first section of fine screening equipment, the second section of tail pulp screened by the second section of fine screening equipment enters the third section of fine screening equipment, the fine pulp screened by the third section of fine screening equipment enters the second section of fine screening equipment, and the dilution vertical pipe is simultaneously communicated with the first section of fine screening equipment, the sand remover, the second section of fine screening equipment and the third section of fine screening equipment, so that the pulp yield is ensured, and the screening efficiency is ensured.
Description
Technical Field
The utility model relates to the field of pulping screening, in particular to a pulping screening system.
Background
The paper making process mainly comprises the procedures of cooking, screening, pulp washing, bleaching, papermaking and the like. Wherein, the screening is a production process that the pulp passes through a screen plate of a fine screening device according to the difference of the size and shape between impurities and fibers in the pulp, and the tail pulp is trapped and separated.
Concentration is one of the main factors affecting screening efficiency. When the pulp concentration is large, the good pulp and impurities are not well separated, the good fibers in the tail pulp are more, the slag discharging rate is high, the fiber loss is large, and the pulp yield is low. In the prior art, the pulp yield is usually improved by increasing the screening times, but when the screening times are increased and the concentration is too low, the production efficiency is reduced and the screening efficiency is low. How to ensure the pulp yield and the screening efficiency is the problem of continuous exploration in the screening process.
Disclosure of Invention
The utility model aims to provide a pulping screening system, which ensures the pulp yield and the screening efficiency.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the pulping screening system comprises a fine screening system, wherein the fine screening system comprises a first section of fine screening equipment, a sand remover, a second section of fine screening equipment, a third section of fine screening equipment and a dilution vertical pipe, wherein a screening outlet of the first section of fine screening equipment is connected with the pulp washing system, a screening outlet of the first section of fine screening equipment is connected with the sand remover, a screening outlet of the sand remover is connected with the second section of fine screening equipment, a screening outlet of the second section of fine screening equipment is connected with the first section of fine screening equipment, a screening outlet of the second section of fine screening equipment is connected with the third section of fine screening equipment, a screening outlet of the third section of fine screening equipment is connected with a slag washer, a screening outlet of the slag washer is connected with the third section of fine screening equipment, a filtrate outlet of the fine screening section of pulp washer is connected with the dilution vertical pipe, and the dilution vertical pipe is simultaneously communicated with the first section of fine screening equipment, the sand remover, the second section of fine screening equipment and the third section of fine screening equipment.
The beneficial effect of this scheme is:
1. the first section of fine screening equipment screens the first section of fine pulp, the first section of fine screening equipment screens the first section of tail pulp, the second section of fine screening equipment screens the second section of fine pulp, the third section of fine screening equipment screens the second section of tail pulp, and the third section of fine screening equipment screens the second section of fine pulp.
2. After pulp enters the first-stage fine screening equipment, part of fibers are adhered to impurities to form blocks, the blocks cannot pass through the screen plate and can only enter the sand remover along with the first-stage tail pulp, at the moment, liquid in the dilution vertical pipe dilutes the first-stage tail pulp and enters the sand remover, the first-stage tail pulp rotates at a high speed in the sand remover, heavier impurities and fibers are separated under the action of centrifugal force, the heavier impurities are discharged downwards, and lighter fibers are discharged upwards and enter the second-stage fine screening equipment. If the paper pulp firstly enters the sand remover and then enters a section of fine screening equipment, more fibers in the paper pulp are difficult to scatter, and most of the fibers are discharged downwards along with the impurities after entering the sand remover, so that the fiber loss is large and the pulp yield is low; in this scheme, through one section fine screening equipment screening, most fibre has been selected out and get into next process, and remaining fibre is through the liquid dilution, and fibre and impurity's combination is no longer inseparable, and the desander can be with impurity and fibre separation more easily, and then has reduced the fibre loss, has improved the pulp yield.
3. And enabling the second-section fine screening equipment to screen the second-section fine pulp again to form a first screening cycle, and enabling the third-section fine screening equipment to screen the fine pulp to enter the second-section fine screening equipment to form a second screening cycle. For some workshops with limited places, the primary fine screening equipment, the sand remover, the secondary fine screening equipment and the tertiary fine screening equipment are connected in sequence, the primary fine screening equipment and the tertiary fine screening equipment are furthest apart, and compared with the condition that the good pulp screened by the tertiary fine screening equipment directly enters the primary fine screening equipment to form a large screening cycle, the length of each screening cycle in the scheme is shorter, the length of a used total pipeline is shorter, the flow is shorter, the circulation time is shorter, and the screening efficiency is higher.
Preferably, as a modification, the dilution standpipe is in the 2# washer filtrate in the subsequent wash process. The device adopts the filtrate of the No. 2 pulp washer in the subsequent pulp washing process as dilution water, increases the utilization rate of water, realizes the cyclic utilization of water, and is energy-saving and environment-friendly.
Preferably, as an improvement, the fine screening system further comprises a slag washer, wherein the tail pulp screened out by the three-section fine screening device enters the slag washer, and the good pulp washed out by the slag washer enters the three-section fine screening device. So set up, wash the tail stock that three sections fine screening equipment sifted out at last, wash out the remaining fibre in the tail stock, avoid extravagant fibre, wash the good thick liquid that sediment machine washed and get into three sections fine screening equipment and form the third screening circulation, circulation length is short, circulation time is short, compensates the problem that low concentration tail stock screening efficiency is low with quick circulation.
Preferably, as an improvement, the system further comprises a knot removing system, wherein the knot removing system comprises a knot removing machine, a knot washing machine and a No. 1 pulp washer, the knot removing machine removes bamboo joints and hard lumps which are not formed into pulp in paper pulp, the obtained paper pulp is coarse pulp, the coarse pulp enters the No. 1 pulp washer for washing, the coarse pulp enters a section of fine screening equipment after being washed, the bamboo joints and the hard lumps enter the knot washing machine for washing, the coarse pulp obtained after the knot washing machine is washed again enters the knot removing machine, and the bamboo joints and the hard lumps remained after the knot washing machine is washed are steamed in the previous steaming procedure again. The arrangement prevents bamboo joints and hard blocks which can be formed into slurry from entering a section of fine screening equipment to block the screen plate, thereby improving the screening efficiency; the bamboo joints and the hard blocks enter the steaming and boiling procedure again to be steamed and boiled, so that the waste of fibers in the bamboo joints and the hard blocks is avoided.
Preferably, as an improvement, the sand remover comprises a pulp inlet pipe, a pulp outlet pipe and a plurality of conical cyclones, wherein the pulp inlet pipe is arranged right below the pulp outlet pipe in parallel, the conical cyclones are evenly distributed on two sides of the pulp inlet pipe and the pulp outlet pipe in a quincuncial shape, the lower ends of the conical cyclones are communicated with the side surfaces of the pulp inlet pipe, and the upper ends of the conical cyclones are communicated with the side surfaces of the pulp outlet pipe. So set up, for guaranteeing screening efficiency, need guarantee the flow in the desander, if use a large-scale desanding unit, then the energy consumption is big, take up an area of big, the degritting speed is slow, the impurity has collided in the desanding unit and has destroyed fibrous structure, and this scheme uses a plurality of toper desanding unit cooperation to use, make full use of advances the space of thick liquid pipe and play thick liquid pipe both sides, the energy consumption is little, take up an area of for a short time, because every toper desanding unit is less relatively, the rock range of paper pulp is little, the collision between the impurity is less, be difficult for destroying fibrous structure, also can not produce less impurity because of the collision between the impurity, and then lead to less impurity and paper pulp to mix together be difficult to be screened out.
Drawings
FIG. 1 is a flow chart of example 1;
fig. 2 is a front view of the sand remover of embodiment 2;
fig. 3 is a top view of the sand remover of embodiment 2.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: a pulp inlet pipe 1, a pulp outlet pipe 2, a conical cyclone 3, a connecting branch pipe 4, a frame body 5 and a slag discharge groove 6.
Example 1
Example 1 a flow chart is shown substantially in fig. 1, example 1 is a pulp screening system comprising a section removal system and a fine screening system.
The section removing system comprises a section removing machine, a section washing machine, a No. 1 pulp washer and a No. 1 pulp washer filtrate tank, wherein the steamed pulp is sprayed into pulp by a high pressure spraying pot and enters the section removing machine, the section removing machine is used for removing bamboo joints and hard lumps which are not formed into pulp in the pulp, the obtained pulp is coarse pulp, the coarse pulp enters the No. 1 pulp washer for washing, the No. 1 pulp washer is a double-roll pulp washer or a vacuum pulp washer (the machine used for distinguishing the follow-up pulp washing process of the screening process is the No. 2 pulp washer), and the coarse pulp washed by the No. 1 pulp washer enters the fine screening system.
On this basis, a first segment removal cycle is formed: the bamboo joints and the hard blocks removed by the joint remover enter the joint washer for cleaning, the coarse pulp obtained after the joint washer is cleaned enters the joint remover again, and the bamboo joints and the hard blocks remained after the joint washer is cleaned enter the last steaming and boiling process again.
On this basis, a second divide-by-two cycle is formed: the filtrate of the No. 2 pulp washer is heated and used for washing the coarse pulp by the No. 1 pulp washer, a part of the filtrate generated after washing the coarse pulp in the No. 1 pulp washer flows back, the No. 1 pulp washer is recycled, and the other part of the filtrate flows into a filtrate tank of the No. 1 pulp washer to be used for the previous steaming process, the dilution by a jet cooker and the dilution by a section remover.
The fine screening system comprises a buffering vertical pipe, a first-section fine screening device, a sand remover, a second-section fine screening device, a third-section fine screening device, a slag washer and a dilution vertical pipe, wherein a screening outlet of the first-section fine screening device 520 is connected with the pulp washing system, a screening outlet of the first-section fine screening device 520 is connected with the sand remover 530, a screening outlet of the sand remover 530 is connected with the second-section fine screening device 540, a screening outlet of the second-section fine screening device 540 is connected with the first-section fine screening device 520, a screening outlet of the second-section fine screening device 540 is connected with the third-section fine screening device 550, a screening outlet of the third-section fine screening device 550 is connected with the slag washer 560, a screening outlet of the slag washer 560 is connected with the third-section fine screening device 550, and a filtrate outlet of the fine screening D0-section pulp washer 130 is connected with the dilution vertical pipe 570. The coarse pulp cleaned by the No. 1 pulp washer is buffered by a buffering vertical pipe and then enters a section of fine screening equipment, and a section of good pulp screened by the section of fine screening equipment enters a next pulp washing process.
On this basis, a first screening cycle is formed: the first-stage tail pulp screened by the first-stage fine screening equipment enters a sand remover, the good pulp screened by the sand remover enters the second-stage fine screening equipment, impurities screened by the sand remover are discharged into a trench, and the second-stage good pulp screened by the second-stage fine screening equipment enters the first-stage fine screening equipment.
On this basis, a second screening cycle was formed: the second-section tail pulp screened by the second-section fine screening equipment enters the third-section fine screening equipment, and the good pulp screened by the third-section fine screening equipment enters the second-section fine screening equipment.
On this basis, a third screening cycle is formed: the tailings screened by the three-section fine screening equipment enter a slag washing machine, the good slurry washed by the slag washing machine enters the three-section fine screening equipment again, and the impurities washed by the slag washing machine are collected and discharged for treatment.
The pulp needs to be diluted before entering the primary fine screening equipment, the desander, the secondary fine screening equipment and the tertiary fine screening equipment, the dilution vertical pipe is simultaneously communicated with the primary fine screening equipment, the desander, the secondary fine screening equipment and the tertiary fine screening equipment, and filtrate of the No. 2 pulp washer is contained in the dilution vertical pipe. In this example, the pulp was pumped for transfer. The first-stage fine screening device, the second-stage fine screening device and the third-stage fine screening device are all vibrating screens.
Example 2
Example 2 based on example 1: the sand remover comprises a pulp inlet pipe 1, a pulp outlet pipe 2, a frame body 5 and a plurality of conical cyclones 3. As shown in fig. 2 and 3, the pulp inlet pipe 1 is arranged right below the pulp outlet pipe 2 in parallel, the pulp inlet pipe 1 and the pulp outlet pipe 2 are connected on the frame 5 through bolts, a plurality of conical cyclones 3 are evenly distributed on two sides of the pulp inlet pipe 1 and the pulp outlet pipe 2, as shown in fig. 3, a plurality of conical cyclones 3 are arranged in a quincuncial manner in the horizontal direction, as shown in fig. 2, a plurality of conical cyclones 3 are arranged in a staggered manner in the vertical direction, slag discharging grooves 6 are formed in the frame 5, the slag discharging grooves 6 are arranged below the conical cyclones 3, connecting branch pipes 4 are welded on two sides of the pulp inlet pipe 1 and the pulp outlet pipe 2 in a horizontal manner, the connecting branch pipes 4 are made of steel, the lower ends of the conical cyclones 3 are all communicated with the connecting branch pipes 4 on the side face of the pulp inlet pipe 1, after one section of tail pulp enters the conical cyclones 3, the conical cyclones 3 enable the tail pulp to rotate at a high speed, lighter materials (good pulp) are discharged upwards through the effect of centrifugal force, and heavier materials (impurities and the like) are discharged from the bottom of the conical cyclone grooves 6 downwards along the inner walls of the slag discharging grooves.
The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (5)
1. Pulping screening system, its characterized in that: including the smart sieve system, smart sieve system includes one section smart sieve equipment, the desander, two sections smart sieve equipment, three sections smart sieve equipment and dilution riser, one section smart sieve equipment screen outlet and pulp washing system connect, one section smart sieve equipment screen outlet and desander are connected, desander screen outlet and two sections smart sieve equipment are connected, two sections smart sieve equipment screen outlet and one section smart sieve equipment connect, two sections smart sieve equipment screen outlet and three sections smart sieve equipment connect, three sections smart sieve equipment screen outlet and two sections smart sieve equipment connect, three sections smart sieve equipment screen outlet and slag washer connect, slag washer screen outlet and three sections smart sieve equipment connect, smart sieve section pulp washer's filtrate outlet and dilution riser connect, the dilution riser communicates with one section smart sieve equipment, desander, two sections smart sieve equipment and three sections smart sieve equipment simultaneously.
2. The pulp screening system of claim 1, wherein: the dilution vertical pipe is filled with the filtrate of the No. 2 pulp washer in the subsequent pulp washing process.
3. The pulp screening system of claim 2, wherein: the fine screening system further comprises a slag washing machine, tail pulp screened out by the three-section fine screening device enters the slag washing machine, and good pulp washed out by the slag washing machine enters the three-section fine screening device.
4. A pulping and screening system according to claim 3, characterized in that: the system comprises a knot removing system, wherein the knot removing system comprises a knot removing machine, a knot washing machine and a No. 1 pulp washing machine, the knot removing machine removes bamboo joints and hard lumps in paper pulp which cannot be formed into pulp, the paper pulp obtained at the moment is coarse pulp, the coarse pulp enters the No. 1 pulp washing machine for washing, the coarse pulp enters a section of fine screening equipment after being washed, the bamboo joints and the hard lumps enter the knot washing machine for washing, the coarse pulp obtained after the knot washing machine is washed enters the knot removing machine again, and the remaining bamboo joints and hard lumps after the knot washing machine is washed enter the previous steaming and boiling process again.
5. The pulp screening system of claim 4, wherein: the sand remover comprises a pulp inlet pipe, a pulp outlet pipe and a plurality of conical cyclones, wherein the pulp inlet pipe is arranged right below the pulp outlet pipe in parallel, the lower ends of the conical cyclones are communicated with the side surfaces of the pulp inlet pipe, and the upper ends of the conical cyclones are communicated with the side surfaces of the pulp outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321712373.2U CN220520964U (en) | 2023-06-30 | 2023-06-30 | Pulping screening system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321712373.2U CN220520964U (en) | 2023-06-30 | 2023-06-30 | Pulping screening system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220520964U true CN220520964U (en) | 2024-02-23 |
Family
ID=89938945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321712373.2U Active CN220520964U (en) | 2023-06-30 | 2023-06-30 | Pulping screening system |
Country Status (1)
| Country | Link |
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| CN (1) | CN220520964U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641252A (en) * | 2023-06-30 | 2023-08-25 | 重庆理文制浆有限公司 | System for washing, selecting and bleaching chemical pulp |
-
2023
- 2023-06-30 CN CN202321712373.2U patent/CN220520964U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641252A (en) * | 2023-06-30 | 2023-08-25 | 重庆理文制浆有限公司 | System for washing, selecting and bleaching chemical pulp |
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