CN111364275B - Method for processing wave-shaped filter screen - Google Patents
Method for processing wave-shaped filter screen Download PDFInfo
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- CN111364275B CN111364275B CN202010189679.9A CN202010189679A CN111364275B CN 111364275 B CN111364275 B CN 111364275B CN 202010189679 A CN202010189679 A CN 202010189679A CN 111364275 B CN111364275 B CN 111364275B
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- surface layer
- wave
- filter screen
- layer
- bottom layer
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0036—Multi-layer screen-cloths
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D11/00—Double or multi-ply fabrics not otherwise provided for
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
- D03D13/002—With diagonal warps or wefts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
Abstract
The invention relates to the technical field of papermaking filter screens, in particular to a method for processing a wave-shaped filter screen, which comprises the following steps: s1, the wave-shaped filter screen comprises a surface layer and a bottom layer, wherein the surface layer adopts a 3-harness twill structure, the surface layer and the bottom layer are bound together by adopting a 3-harness twill structure, and every 42 or adjacent 3 warps are used for binding the warps of the surface layer and the bottom layer in the twill structure of the surface layer; s2, the integral weaving of the wave-shaped filter screen adopts 6 harnesses or 12 harnesses; s3, forming a continuous wave arch shape by the surface layer under the action of low heat, and directly influencing the height and length of the final wave structure due to different circulating numbers of warp threads of the surface layer; the bottom layer can cling to the surface of the pulp grinder through low heat shrinkage, so that the working foundation of the filter screen is realized; according to the invention, the surface layer is in a continuous wave arch shape through the independent separation and binding of the surface layer and the bottom layer, so that the contact area between the filter screen and the slurry is increased, and the filtering quality is improved; the bottom layer is made of wear-resistant nylon monofilaments, and the wear-resistant nylon monofilaments are shrunk and fastened on the surface of the pulp grinder, so that the working foundation of the filter screen is realized.
Description
Technical Field
The invention relates to the field of papermaking filter screens, in particular to a method for processing a wave-shaped filter screen.
Background
The paper pulp filtering is an essential process in the current paper making process, the quality of the paper making filter screen directly affects the paper quality and the paper cost, and the paper produced by the filter screen woven by fine silk threads has good quality.
However, the existing filter screen is fixed on a pulping machine plate in a single-layer or multi-layer mode by adopting a plane structure. The single-layer filter screen has high filtering efficiency, poor filtering quality, short service life and lower contact area (pulp fiber retention); the multi-layer filter screen has high filtering quality, low filtering efficiency and low contact area (pulp fiber retention). The existing filter screens are directly attached to the working surface of the filter, and the area of the working surface of the filter is equivalent to the contact area of the filter.
Disclosure of Invention
The invention designs a processing method of a wave-shaped filter screen aiming at the problems proposed by the background technology, and an obvious double-layer structure is formed: the surface layer is in a continuous wave arch shape, so that the contact area between the net and the slurry is increased; the bottom layer is made of wear-resistant nylon monofilament and is shrunk and fastened on the surface of the filter.
The invention is realized by the following technical scheme:
a method for processing a wave-shaped filter screen comprises the following steps:
s1, the wave-shaped filter screen comprises a surface layer and a bottom layer, wherein the surface layer adopts a 3-harness twill structure, the surface layer and the bottom layer are bound together by adopting a 3-harness twill structure, and every 42 or adjacent 3 warps are used for binding the warps of the surface layer and the bottom layer in the twill structure of the surface layer;
s2, the integral weaving of the wave-shaped filter screen adopts 6 harnesses or 12 harnesses, the middle surface layer of the wave-shaped filter screen is woven by polyester monofilaments, and the middle surface layer of the wave-shaped filter screen is woven by nylon monofilaments;
s3, forming a continuous wave arch shape by the surface layer under the action of low heat, and directly influencing the height and length of the final wave structure due to different circulating numbers of warp threads of the surface layer; the bottom layer can be tightly attached to the surface of the pulp machine through low heat shrinkage, so that the working foundation of the filter screen is realized.
As a further improvement of the scheme, the surface layer equator and the bottom layer equator can adopt fibers with different sizes, and the cross-sectional diameter ratio of the surface layer equator to the bottom layer equator is (2-4): 1.
As a further improvement of the above scheme, in the 6-heddle drafting cycle in the step S2, every 45 warps are adopted as a complete cycle, and after every 3 wefts are woven by polyester monofilaments, 1 nylon monofilament is led to realize head non-weaving.
As a further improvement of the above scheme, in the step S2, the 12-heddle drafting cycle uses 54 warps as a complete cycle, and the ram is not woven by picking 1 nylon monofilament after every 3 polyester monofilaments are woven for the weft.
As a further improvement of the scheme, the low heat treatment temperature of the surface layer is 70-90 ℃, and the low heat shrinkage temperature of the bottom layer is 110-130 ℃.
As a further improvement of the above scheme, the surface layer arched wave-shaped structure is continuous and uninterrupted, and an effective pulp fiber retaining hole structure is formed on the surface; the bottom layer is in a full-penetration state, water or fine impurities do not obviously obstruct or stay after passing through, and free flowing away under free flow speed or negative pressure can be realized.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the surface layer is in a continuous wave arch shape by independently separating and binding the surface layer and the bottom layer, so that the contact area between the filter screen and the slurry is increased, and the filtering quality is improved; the bottom layer is made of wear-resistant nylon monofilaments, and the wear-resistant nylon monofilaments are shrunk and fastened on the surface of the pulp grinder, so that the working foundation of the filter screen is realized.
2. Although the filter screen is of a two-layer structure, the bottom layer basically does not play a role in interception, water and impurities filtered by the surface screen can be freely lost without being retained, and the effect that the filter screen is not easy to dirty is achieved.
3. In the invention, the surface layer is of a single-layer woven hole structure, the passing of liquid and small particle impurities is ensured by proper mesh holes and proper size, and the pulp fibers with certain length are effectively intercepted by the interwoven warps and wefts, so that the filtering efficiency is not reduced compared with that of a multilayer filter screen.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a screen of the present invention (not fully low heat shrunk in place);
FIG. 2 is a side view of a screen of the present invention (not fully low heat shrunk in place);
FIG. 3 is a view of the present invention with the filter screen mounted on a fan blade of the filter;
FIG. 4 is a weave diagram of a 6 harness loom in accordance with embodiment 1 of the present invention;
FIG. 5 is a drawing of a warp yarn 6 healed in accordance with example 1 of the present invention;
FIG. 6 is a weaving pattern diagram of a 12 harness loom in embodiment 2 of the present invention;
fig. 7 is a drawing of the warp 12 drafting arrangement in example 2 of the present invention.
Wherein, 1-surface layer warp, 2-bottom layer warp, 3-surface layer weft, 4-bottom layer weft and 5-binding wire.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 1-3, a method for processing a wave-shaped filter screen comprises the following steps:
s1, the wave-shaped filter screen comprises a surface layer 1 and a bottom layer 2, the surface layer 1 adopts a 3-harness twill structure, the binding of the surface layer 1 and the bottom layer 2 also adopts a 3-harness twill structure, every 42 or adjacent 3 warps are used for binding the warps of the surface layer 1 and the bottom layer 2 after 51 warps are in the twill structure of the surface layer 1, the wefts of the surface layer 1 and the wefts of the bottom layer 2 can adopt fibers with different sizes, and the section diameter ratio of the wefts of the surface layer 1 to the wefts of the bottom layer 2 is (2-4): 1;
s2, the integral weaving of the wave-shaped filter screen adopts 6 harnesses or 12 harnesses, the middle surface layer 1 of the wave-shaped filter screen is woven by polyester monofilaments, and the middle bottom layer 2 of the wave-shaped filter screen is woven by nylon monofilaments; the 6-healed drafting circulation adopts a complete circulation of every 45 warps, and 1 nylon monofilament is led after every 3 wefts are woven by polyester monofilaments to realize no weaving of a pressure head; the 12-healed drafting cycle adopts 54 warps as a complete cycle, and the pressure head is not woven by inserting 1 nylon monofilament after every 3 polyester monofilaments are woven by the wefts;
s3, the surface layer 1 forms a continuous wave arch shape under the action of low heat, and the height and the length of the final wave structure are directly influenced due to different warp circulation numbers of the surface layer 1; the bottom layer 2 can be tightly attached to the surface of the pulp machine through low heat shrinkage, so that the working foundation of the filter screen is realized, wherein the temperature of the low heat treatment of the surface layer 1 is 70-90 ℃, and the low heat shrinkage temperature of the bottom layer 2 is 110-130 ℃.
As can be seen from fig. 1, it is evident that the face layer 1 is of a woven structure, capable of forming an effective pulp fiber-left pore structure, and the face layer 1 is arched into a wave-shaped structure and is of a continuous uninterrupted structure. If the filter is arranged on a large-area working surface of the filter, the contact area of the pulp fibers is greatly increased; from fig. 2 and 3, it is obvious that the back surface of the filter screen is in a full-penetration state basically, water or fine impurities pass through the filter screen without obvious obstruction or stop, free flowing at a free flow rate or under negative pressure can be realized, so that dirt retention at the bottom of the filter screen is not easy to realize, the cleaning frequency and the filter screen replacement frequency are greatly reduced, the surface layer 1 of the filter screen forms an obvious continuous wave arch structure, the area is obviously improved relative to the bottom layer 2, and large-area contact of pulp fibers can be realized. Therefore, the effective filtering area is greatly increased under the condition that the surface area of the filter is not changed. If in the planar condition, the surface layer 1 is completely arc-shaped and contracted to form a semicircle, the area can be obtained according to the formula of the area: under the same plane, the contact area of the solid arc is increased by 1.57 times, namely the contact area is increased by 57%. Even in the case of incomplete shrinkage, the contact area is significantly increased.
The working principle of the invention is as follows: through the independent separation and binding of the upper layer and the lower layer, the bottom layer 2 can be tightly attached to the surface of the sizing machine after low thermal shrinkage, and the working foundation of the filter screen is realized; the surface layer 1 is of a woven hole structure, a proper amount of meshes and proper sizes ensure that liquid and small particle impurities pass through, the interwoven warps and wefts effectively intercept slurry fibers with a certain length for subsequent processing, and meanwhile, the surface layer 1 forms a continuous wave arch shape under the action of low heat, so that the contact area between the surface layer 1 and the slurry fibers is greatly increased.
Example 1
As shown in fig. 4 and 5, a method for processing a wave-shaped filter screen includes the following steps:
s1, the wave-shaped filter screen comprises a surface layer 1 and a bottom layer 2, the surface layer 1 adopts a 3-harness twill structure, the binding of the surface layer 1 and the bottom layer 2 also adopts a 3-harness twill structure, every 42 warps are adjacent to 3 warps in the twill structure of the surface layer 1 and are used for binding the warps of the surface layer 1 and the bottom layer 2, the wefts in the surface layer 1 and the wefts in the bottom layer 2 can adopt fibers with different sizes, and the section diameter ratio of the wefts in the surface layer 1 to the wefts in the bottom layer 2 is 3: 1;
s2, the integral weaving of the wave-shaped filter screen adopts 6 harnesses, the middle surface layer 1 of the wave-shaped filter screen is woven by polyester monofilaments, and the middle bottom layer 2 of the wave-shaped filter screen is woven by nylon monofilaments; the 6-healed drafting circulation adopts a complete circulation of every 45 warps, and 1 nylon monofilament is led after every 3 wefts are woven by polyester monofilaments to realize no weaving of a pressure head;
s3, the surface layer 1 forms a continuous wave arch shape under the action of low heat, and the height and the length of the final wave structure are directly influenced due to different warp circulation numbers of the surface layer 1; the bottom layer 2 can be tightly attached to the surface of the pulp machine through low heat shrinkage, so that the working foundation of the filter screen is realized, wherein the temperature of the low heat treatment of the surface layer 1 is 75 ℃, and the temperature of the low heat shrinkage of the bottom layer 2 is 125 ℃.
Example 2
As shown in fig. 6 and 7, a method for processing a wave-shaped filter screen includes the following steps:
s1, the wave-shaped filter screen comprises a surface layer 1 and a bottom layer 2, the surface layer 1 adopts a 3-harness twill structure, the binding of the surface layer 1 and the bottom layer 2 also adopts a 3-harness twill structure, every 51 warps are adjacent to 3 warps in the twill structure of the surface layer 1 and are used for binding the warps of the surface layer 1 and the bottom layer 2, the wefts in the surface layer 1 and the wefts in the bottom layer 2 can adopt fibers with different sizes, and the section diameter ratio of the wefts in the surface layer 1 to the wefts in the bottom layer 2 is 3: 1;
s2, the integral weaving of the wave-shaped filter screen adopts 12 harnesses, the middle surface layer 1 of the wave-shaped filter screen is woven by polyester monofilaments, and the middle bottom layer 2 of the wave-shaped filter screen is woven by nylon monofilaments; the 12-healed drafting cycle adopts 54 warps as a complete cycle, and the pressure head is not woven by inserting 1 nylon monofilament after every 3 polyester monofilaments are woven by the wefts;
s3, the surface layer 1 forms a continuous wave arch shape under the action of low heat, and the height and the length of the final wave structure are directly influenced due to different warp circulation numbers of the surface layer 1; the bottom layer 2 can be tightly attached to the surface of the pulp machine through low heat shrinkage, so that the working foundation of the filter screen is realized, wherein the temperature of the low heat treatment of the surface layer 1 is 80 ℃, and the temperature of the low heat shrinkage of the bottom layer 2 is 115 ℃.
In conclusion, the surface layers 1 in the embodiment 1 and the embodiment 2 are in a continuous wave arch shape, so that the contact area between the filter screen and the slurry is increased, and the filtering quality is improved; the bottom layer 2 is made of wear-resistant nylon monofilaments, is shrunk and fastened on the surface of the slurry machine, the working foundation of the filter screen is realized, the bottom layer 2 basically has no interception function, water and impurities filtered by the surface screen can be freely lost and not retained, and the effect that the filter screen is not easy to dirty is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The processing method of the wave-shaped filter screen is characterized by comprising the following steps:
s1, the wave-shaped filter screen comprises a surface layer and a bottom layer, wherein the surface layer adopts a 3-harness twill structure, the surface layer and the bottom layer are bound together by adopting a 3-harness twill structure, and every 42 or adjacent 3 warps are used for binding the warps of the surface layer and the bottom layer in the twill structure of the surface layer;
s2, the integral weaving of the wave-shaped filter screen adopts 6 harnesses or 12 harnesses, the middle surface layer of the wave-shaped filter screen is woven by polyester monofilaments, and the middle surface layer of the wave-shaped filter screen is woven by nylon monofilaments;
s3, forming a continuous wave arch shape on the surface layer after low-heat treatment, and directly influencing the height and length of the final wave structure due to different circulating numbers of warp threads of the surface layer; the bottom layer can be tightly attached to the surface of the pulp machine through low heat shrinkage, so that the working foundation of the filter screen is realized.
2. The method of manufacturing a wave screen according to claim 1, wherein: the surface layer equator and the bottom layer equator adopt fibers with different sizes, and the cross-sectional diameter ratio of the surface layer equator to the bottom layer equator is (2-4): 1.
3. The method of manufacturing a wave screen according to claim 1, wherein: in the step S2, the 6-healed drafting circulation is a complete circulation which adopts every 45 warps as one, and the pressure head is not woven by leading 1 nylon monofilament after every 3 polyester monofilaments are woven for the wefts.
4. The method of manufacturing a wave screen according to claim 1, wherein: in the step S2, 54 warps are used as a complete cycle in the 12-heddle drafting cycle, and the pressure head is not woven by inserting 1 nylon monofilament after every 3 polyester monofilaments are woven in the wefts.
5. The method of manufacturing a wave screen according to claim 1, wherein: the surface layer low heat treatment temperature is 70-90 ℃, and the bottom layer low heat shrinkage temperature is 110-130 ℃.
6. The method of manufacturing a wave screen according to claim 1, wherein: the surface layer is arched to form a wave-shaped structure continuously, and an effective slurry fiber reserved hole structure is formed on the surface of the surface layer; the bottom layer is in a full-penetration state, water or fine impurities do not obviously obstruct or stay after passing through, and free flowing away under free flow speed or negative pressure can be realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010189679.9A CN111364275B (en) | 2020-03-18 | 2020-03-18 | Method for processing wave-shaped filter screen |
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| CN202010189679.9A CN111364275B (en) | 2020-03-18 | 2020-03-18 | Method for processing wave-shaped filter screen |
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| CN111364275B true CN111364275B (en) | 2022-03-22 |
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Citations (7)
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| US3781957A (en) * | 1972-09-15 | 1974-01-01 | Improved Machinery Inc | Drum including annular grid structure |
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| CN201896277U (en) * | 2010-09-10 | 2011-07-13 | 安徽华宇网业有限公司 | Pulp mesh |
| CN206778019U (en) * | 2017-03-30 | 2017-12-22 | 浙江天台华宇工业用布有限公司 | A kind of Novel filtration screen cloth |
| CN108796752A (en) * | 2018-07-25 | 2018-11-13 | 安徽福仕达网带有限公司 | The production technology of composite conducting special type guipure |
| CN208121468U (en) * | 2018-07-26 | 2018-11-20 | 维达纸业(浙江)有限公司 | A kind of veil for defending roll paper for producing multilayer |
| CN109955548A (en) * | 2019-04-08 | 2019-07-02 | 安徽福仕达网带有限公司 | A kind of efficiently high more disk strainers of support construction |
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2020
- 2020-03-18 CN CN202010189679.9A patent/CN111364275B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3781957A (en) * | 1972-09-15 | 1974-01-01 | Improved Machinery Inc | Drum including annular grid structure |
| CN2314865Y (en) * | 1997-12-20 | 1999-04-21 | 中原石油勘探局机械修造五厂 | Screen of vibration screen for well drill liquid |
| CN201896277U (en) * | 2010-09-10 | 2011-07-13 | 安徽华宇网业有限公司 | Pulp mesh |
| CN206778019U (en) * | 2017-03-30 | 2017-12-22 | 浙江天台华宇工业用布有限公司 | A kind of Novel filtration screen cloth |
| CN108796752A (en) * | 2018-07-25 | 2018-11-13 | 安徽福仕达网带有限公司 | The production technology of composite conducting special type guipure |
| CN208121468U (en) * | 2018-07-26 | 2018-11-20 | 维达纸业(浙江)有限公司 | A kind of veil for defending roll paper for producing multilayer |
| CN109955548A (en) * | 2019-04-08 | 2019-07-02 | 安徽福仕达网带有限公司 | A kind of efficiently high more disk strainers of support construction |
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