CN110924212B - A pressure knot removal machine - Google Patents
A pressure knot removal machine Download PDFInfo
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- CN110924212B CN110924212B CN201911364728.1A CN201911364728A CN110924212B CN 110924212 B CN110924212 B CN 110924212B CN 201911364728 A CN201911364728 A CN 201911364728A CN 110924212 B CN110924212 B CN 110924212B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/16—Cylinders and plates for screens
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- 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
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Abstract
本发明公开了一种压力除节机，属于造纸制浆用压力筛设备技术领域，包括密闭筛室，密闭筛室顶部设有上盖，在密闭筛室内底部同轴设有密闭筒体，在密闭筒体中下部对应的密闭筛室内壁上设有环形台阶，环形台阶与密闭筒体之间连接有环形框架，在密闭筒体内同轴转动连接有竖直转轴，竖直转轴底端伸出密闭筛室且在其末端设有传动轮，竖直转轴顶端向上伸出密闭筒体，在密闭筒体上套设有筛鼓，筛鼓顶端通过旋转盘与竖直转轴传动连接，筛鼓底端与环形台阶密封转动连接，实现一种专门针对多节子和多纤维束的筛选设备。
The present invention discloses a pressure knot remover, which belongs to the technical field of pressure screen equipment for papermaking and pulping. The pressure knot remover comprises a closed screen chamber, an upper cover is arranged on the top of the closed screen chamber, a closed cylinder is coaxially arranged at the bottom of the closed screen chamber, an annular step is arranged on the inner wall of the closed screen chamber corresponding to the middle and lower part of the closed cylinder, an annular frame is connected between the annular step and the closed cylinder, a vertical rotating shaft is coaxially rotatably connected in the closed cylinder, the bottom end of the vertical rotating shaft extends out of the closed screen chamber and a transmission wheel is arranged at the end thereof, the top end of the vertical rotating shaft extends upward out of the closed cylinder, a screen drum is sleeved on the closed cylinder, the top end of the screen drum is transmission-connected to the vertical rotating shaft through a rotating disk, and the bottom end of the screen drum is sealingly rotatably connected to the annular step, so as to realize a screening device specifically for multi-knots and multi-fiber bundles.
Description
Technical Field
The invention belongs to the technical field of pressure screen equipment for papermaking pulping, and particularly relates to a pressure knot removing machine which is particularly suitable for being used as knot removing equipment for various plant fiber raw materials.
Background
In the current stage, the pressure screen is used as a pulping line of the domestic papermaking industry, the technology of the pressure screen is mature gradually, domestic manufacturers are introduced from the initial technology and gradually transition to technical innovation, and the pressure screen is adjusted more suitable for the domestic papermaking enterprises from various aspects.
Chinese patent publication No. CN2048870U discloses a pressure screen for removing knots, which is composed of a qualified pulp collecting chamber, a coarse slag separating chamber, a driving shaft and a rotor. The qualified pulp collecting chamber is provided with a pulp outlet pipe, and the coarse slag separating chamber is provided with a pulp inlet pipe and a slag discharging pipe. The qualified pulp collecting chamber is positioned above the coarse slag separating chamber, and a group of plane coaxial annular screen slots consisting of a coaxial movable ring on the rotor and a coaxial static ring on the shell of the qualified pulp collecting chamber are arranged between the two, so that coarse slag with the size larger than that of the screen slots is prevented from passing through the screen slots. The invention has the advantages of high efficiency of removing the section, low electricity consumption, difficult blocking of the screen joints, no need of adding water for dilution, and the pulp inlet concentration can reach up to 5%.
The utility model provides a chinese journal, 28 nd volume 7 phase 8-10 pages of paper and papermaking 2009, discloses domestic novel high dense internal flow type rotary drum pressure festival removing machine, mainly introduced domestic novel pressure festival removing machine's basic structure, theory of operation and application condition, the internal flow rotary drum type pressure festival removing machine throughput ability is big, removes festival effectually, and good thick liquid content is few in the tail pulp, and heavy impurity is little to screen cylinder wearing and tearing, and light impurity also can not adhere to on the screen cylinder, also can not block up the sieve mesh even running under higher concentration, advanced structure, dependable performance.
Because the fiber bundles which are not thoroughly steamed in the chemimechanical pulping and papermaking process and the fiber bundles which cannot be formed through steaming are more, the traditional rotor-type pressure screen for screening the fiber bundles is low in efficiency, low in screening yield and easy to block and block, and the production efficiency is affected, so that the research on the screening equipment specially aiming at the multiple sections of the fiber bundles and the multiple fiber bundles is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a pressure joint remover, which adopts the following technical scheme to achieve the purposes:
The pressure joint remover comprises a closed screen chamber, wherein an upper cover is arranged at the top of the closed screen chamber, a closed cylinder body is coaxially arranged at the inner bottom of the closed screen chamber, an annular step is arranged on the inner wall of the closed screen chamber corresponding to the middle lower part of the closed cylinder body, an annular frame is connected between the annular step and the closed cylinder body, a vertical rotating shaft is coaxially and rotatably connected in the closed cylinder body, the bottom end of the vertical rotating shaft extends out of the closed screen chamber, a driving wheel is arranged at the tail end of the vertical rotating shaft, the top end of the vertical rotating shaft extends out of the closed cylinder body upwards, a screen cylinder is sleeved on the closed cylinder body, the top end of the screen cylinder is in transmission connection with the vertical rotating shaft through a rotating disc, and the bottom end of the screen cylinder is in sealing and rotating connection with the annular step;
The space between the screen cylinder and the airtight screen chamber is an outer screening area, the space between the screen cylinder and the airtight cylinder is an inner screening area, a tangential pulp inlet pipe communicated with the top of the outer screening area is arranged at the upper part of the airtight screen chamber, a tangential heavy slag discharge pipe communicated with the bottom of the outer screening area is arranged at the lower part of the airtight screen chamber, a light slag discharge pipe communicated with the top of the outer screening area is arranged on the upper cover, and a tangential pulp discharge pipe communicated with the bottom of the inner screening area is arranged at the bottom of the airtight screen chamber.
Preferably, a plurality of suspension wings arranged along the vertical direction are arranged on the closed cylinder body around the circumference, the outer side surfaces of the suspension wings are folded surfaces, the rotation direction of the screen cylinder is taken as the front direction, and the gap between the folded surfaces and the inner wall of the screen cylinder is gradually increased from the front direction to the rear direction, so that a reverse buffer area is formed between the folded surfaces and the inner wall of the screen cylinder.
Preferably, the bottom of the suspension wing bottom screen cylinder is aligned.
Preferably, a detachable lining cylinder body is arranged on the inner wall of the closed screen chamber corresponding to the outer screening area.
Preferably, a plurality of spoiler combinations are arranged at the bottom of the upper cover around the circumference.
Preferably, a washing water pipe is arranged on the tangential heavy slag discharge pipe, and the water inlet direction of the washing water pipe is arranged along the heavy slag discharge direction in the tangential heavy slag discharge pipe.
Preferably, a dilution water pipe communicated with the inner screening area is arranged at the bottom of the closed screen chamber.
Preferably, a suspension arm is hinged on the upper cover, and the free end of the suspension arm is connected with the upper cover through a rotary bolt.
Preferably, the bottom end of the screen cylinder is in labyrinth seal rotary connection with the annular step.
Preferably, the airtight screen chamber comprises an upper cylinder and a lower cylinder which are connected through a first flange, and the top of the upper cover is connected with the top of the upper cylinder through a second flange.
The invention has the advantages that (1) the screen cylinder divides the airtight screen chamber into the outer screening area and the inner screening area, the whole screen chamber is in a fully sealed state and is subjected to continuous screening work under pressure, impurities are divided into the outer screening area, qualified pulp enters the inner screening area through the screen holes under the action of pressure difference between the inner and the outer of the screen cylinder and is discharged by the tangential pulp discharging pipe at the bottom, and the invention is particularly suitable for screening fiber bundles and pulp with more fibers and knots which cannot be formed through digestion;
(2) The pulp in the reverse buffer area has a periodical pulse type back flushing effect on the sieve holes of the screen cylinder to clean the sieve holes, so that the pulp continuously and smoothly passes through the sieve holes, thereby ensuring the efficient and continuous operation of screening;
(3) The detachable lining barrel arranged on the inner wall of the airtight screen chamber, namely the lining barrel is convenient to install and detach, and when the lining barrel is damaged, the lining barrel is only required to be replaced, so that the operation is simple and quick, and the cost is saved;
(4) A plurality of spoiler assemblies are arranged at the bottom of the upper cover around the circumference, so that the rotation of the upper light slag is weakened, the light slag is easily discharged from the light slag discharge pipe 5, and the abrasion to the upper cover is reduced;
(5) A small amount of washing water is filled into the tangential heavy slag discharge pipe through the washing water pipe, so that the heavy slag is washed, and the vitamin loss is further reduced;
(6) A dilution water pipe communicated with the inner screening area is arranged at the bottom of the closed screening chamber, and the good pulp screening in the inner screening area can be performed by adding dilution water into the dilution water pipe so as to adjust the screening concentration and improve the screening efficiency;
(7) In order to facilitate the whole assembly and lifting, the airtight screen chamber comprises an upper cylinder body and a lower cylinder body which are connected through a first flange, and an upper cover is connected with the top of the upper cylinder body through a second flange;
(8) The annular step is divided into the horizontal connecting ring and the vertical connecting ring which are connected with each other through bolts, so that the vertical connecting ring can be singly reinforced and thickened, and only the vertical connecting ring needs to be replaced even if the vertical connecting ring is replaced, thereby reducing the occurrence of shutdown condition, prolonging the service life and reducing the maintenance cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a partial cross-sectional view of the right side view of FIG. 1;
FIG. 3 is a partial cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is an enlarged view of the portion N of fig. 2;
fig. 5 is an enlarged view of the portion M in fig. 2.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the pressure joint remover comprises a closed screen chamber 7, wherein an upper cover 6 is arranged at the top of the closed screen chamber 7, a closed cylinder 12 is coaxially arranged at the inner bottom of the closed screen chamber 7, an annular step 23 is arranged on the inner wall of the closed screen chamber 7 corresponding to the middle lower part of the closed cylinder 12, an annular frame 14 is connected between the annular step 23 and the closed cylinder 12, a vertical rotating shaft 10 is coaxially and rotatably connected in the closed cylinder 12, the bottom end of the vertical rotating shaft 10 extends out of the closed screen chamber 7 and is provided with a driving wheel 11 at the tail end, the top end of the vertical rotating shaft 10 extends out of the closed cylinder 12 upwards, a screen cylinder 20 is sleeved on the closed cylinder 12, the top end of the screen cylinder 20 is in transmission connection with the vertical rotating shaft 10 through a rotating disc 16, and the bottom end of the screen cylinder 20 is in rotary connection with the annular step 23 through a labyrinth seal structure 24;
The space between the screen drum 20 and the airtight screen chamber 7 is an outer screening area 19, the space between the screen drum 20 and the airtight cylinder 12 is an inner screening area 21, a tangential pulp inlet pipe 3 communicated with the top of the outer screening area 19 is arranged at the upper part of the airtight screen chamber 7, a tangential heavy slag discharge pipe 2 communicated with the bottom of the outer screening area 19 is arranged at the lower part of the airtight screen chamber 7, a light slag discharge pipe 5 communicated with the top of the outer screening area 19 is arranged on the upper cover 6, and a tangential pulp discharge pipe 9 communicated with the bottom of the inner screening area 21 is arranged at the bottom of the airtight screen chamber 7.
The circumference on airtight barrel 12 is equipped with a plurality of suspension wings 15 that set up along vertical direction, and the preferential selection is four, suspension wings 15 bottom screen cylinder 20 bottom is aimed at, and the lateral surface of suspension wings 15 is the profile of folding, take screen cylinder 20 rotation direction L to be preceding direction, thereby form a reverse buffer zone 22 from the clearance between profile of folding and the screen cylinder 20 inner wall step by step between the profile of folding and the screen cylinder 20 inner wall, in the in-process of screen cylinder 20 rotation, the reverse impact of paper pulp gets into in the reverse buffer zone 22 thereby produces a periodic impulse recoil to wash the effect of sieve mesh to screen mesh of screen cylinder 20 and makes the thick liquids constantly pass through the sieve mesh smoothly, thereby guaranteed the high-efficient continuous operation of screening.
Meanwhile, in order to avoid the heavy slag thrown out at high speed from directly striking the inner wall of the airtight screen chamber 7 to accelerate damage, reduce service life, reduce downtime and equipment maintenance cost, a detachable lining cylinder 18 is arranged on the inner wall of the airtight screen chamber 7 corresponding to the outer screening area 19, namely the lining cylinder 18 is convenient to install and detach, and when the lining cylinder 18 is damaged, the lining cylinder 18 only needs to be replaced, so that the operation is simple and quick, and the cost is saved. On the other hand, a plurality of spoiler assemblies 17 are arranged at the bottom of the upper cover 6 around the circumference, firstly, the rotation of the upper light slag is weakened, the light slag is easily discharged from the light slag discharging pipe 5, and secondly, the abrasion to the upper cover 6 is reduced.
Since the heavy slag in the tangential heavy slag discharge pipe 2 contains part of the fibers, the elutriation water pipe 1 is arranged on the tangential heavy slag discharge pipe 2, and the water inlet direction of the elutriation water pipe 1 is arranged along the heavy slag discharge direction in the tangential heavy slag discharge pipe 2, so that the elutriation water entering from the elutriation water pipe 1 is used for elutriation, and the fiber loss is reduced. The bottom of the closed screening chamber 7 is provided with a dilution water pipe 8 communicated with an inner screening area 21, and the screening of the good pulp in the inner screening area 21 can be realized by adding dilution water into the dilution water pipe 8 to adjust the screening concentration so as to improve the screening efficiency.
In order to facilitate the whole assembly and lifting, the airtight screen chamber 7 comprises an upper cylinder body and a lower cylinder body which are connected through a first flange, the top of the upper cover 6 is connected with the top of the upper cylinder body through a second flange, the upper cover 6 is hinged with a suspension arm 4, and the free end of the suspension arm 4 is connected with the upper cover 6 through a rotary bolt.
When the invention works, pulp enters the outer screening area 19 tangentially through the tangential pulp inlet pipe 3, the vertical rotating shaft 10 drives the screen drum 20 to rotate for screening, the high-speed rotating screen drum 20 ensures that impurities in the pulp cannot enter the inner screening area 21, particularly large-grain-weight impurities such as knots can be thrown in the outer screening area 19 and finally fall at the bottom and are periodically discharged through the tangential heavy slag discharge pipe 2, tail pulp and light impurities float above and are periodically discharged through the light slag discharge pipe 5, qualified pulp passes through the screen drum 20 and enters the inner screening area 21.
In the screening process, a small amount of flushing water in the elutriation water pipe 1 washes heavy impurities and separates qualified fibers mixed on the heavy impurities, so that fiber loss in the heavy impurities is reduced, the good pulp screening in the inner screening area 21 can be adjusted by adding dilution water into the dilution water pipe 8 to adjust screening concentration, so that screening efficiency is improved, pulp reversely impacts into the reverse buffer area 22, and a periodical pulse type recoil cleaning effect on the sieve holes of the screen drum 20 is generated, so that pulp continuously and smoothly passes through the sieve holes, and efficient and continuous operation of screening is ensured.
The heavy slag is rubbed with the annular step 23 for a long time under the driving action of high-speed rotation of the screen cylinder 20 after falling on the bottom of the outer screening area 19, so that the heavy slag is easy to grind through and enters the inner screening area 21 to be mixed with the good slurry, therefore, as shown in fig. 5, the annular step 23 is divided into the horizontal connecting ring 26 and the vertical connecting ring 25 which are connected with each other through bolts, the bottom end of the screen cylinder 20 and the vertical connecting ring 25 are rotationally connected through the labyrinth seal structure 24, thus the vertical connecting ring 25 can be singly reinforced and thickened, and even if the vertical connecting ring 25 is replaced, the occurrence of shutdown condition is reduced, the service life is prolonged, and the maintenance cost is reduced.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911364728.1A CN110924212B (en) | 2019-12-26 | 2019-12-26 | A pressure knot removal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911364728.1A CN110924212B (en) | 2019-12-26 | 2019-12-26 | A pressure knot removal machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110924212A CN110924212A (en) | 2020-03-27 |
| CN110924212B true CN110924212B (en) | 2025-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911364728.1A Active CN110924212B (en) | 2019-12-26 | 2019-12-26 | A pressure knot removal machine |
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| CN (1) | CN110924212B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364274B (en) * | 2020-04-30 | 2022-04-01 | 郑州磊展科技造纸机械有限公司 | Novel pressure screen |
| CN112482074A (en) * | 2020-12-10 | 2021-03-12 | 郑州运达造纸设备有限公司 | Combined type pressure screen |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000053845A1 (en) * | 1999-03-10 | 2000-09-14 | Valmet Fibertech Ab | Screening apparatus |
| CN201598529U (en) * | 2009-12-03 | 2010-10-06 | 诸城市天工造纸机械有限公司 | Rotary drum pressure coarse screen |
| CN203654079U (en) * | 2013-12-31 | 2014-06-18 | 郑州运达造纸设备有限公司 | Sealing device of drum sieve |
| CN108411676A (en) * | 2018-05-30 | 2018-08-17 | 山东杰锋机械制造有限公司 | Energy-efficient paper pulp coarse sizing system |
| CN208104877U (en) * | 2017-12-26 | 2018-11-16 | 郑州运达造纸设备有限公司 | A kind of lining plate structure of combined pressure sieve |
| CN211471958U (en) * | 2019-12-26 | 2020-09-11 | 郑州运达造纸设备有限公司 | Pressure knot-removing machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2205651C (en) * | 1994-12-07 | 2006-06-20 | Sunds Defibrator Industries Ab | Screening arrangement |
| CN104594096B (en) * | 2014-12-22 | 2017-04-26 | 山东晨钟机械股份有限公司 | Rotary drum type screening joint machine |
| CN206428511U (en) * | 2017-01-22 | 2017-08-22 | 中山联合鸿兴造纸有限公司 | a pressure screen |
-
2019
- 2019-12-26 CN CN201911364728.1A patent/CN110924212B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000053845A1 (en) * | 1999-03-10 | 2000-09-14 | Valmet Fibertech Ab | Screening apparatus |
| CN201598529U (en) * | 2009-12-03 | 2010-10-06 | 诸城市天工造纸机械有限公司 | Rotary drum pressure coarse screen |
| CN203654079U (en) * | 2013-12-31 | 2014-06-18 | 郑州运达造纸设备有限公司 | Sealing device of drum sieve |
| CN208104877U (en) * | 2017-12-26 | 2018-11-16 | 郑州运达造纸设备有限公司 | A kind of lining plate structure of combined pressure sieve |
| CN108411676A (en) * | 2018-05-30 | 2018-08-17 | 山东杰锋机械制造有限公司 | Energy-efficient paper pulp coarse sizing system |
| CN211471958U (en) * | 2019-12-26 | 2020-09-11 | 郑州运达造纸设备有限公司 | Pressure knot-removing machine |
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