CN1320741A - Screen mesh - Google Patents
Screen mesh Download PDFInfo
- Publication number
- CN1320741A CN1320741A CN01111936.5A CN01111936A CN1320741A CN 1320741 A CN1320741 A CN 1320741A CN 01111936 A CN01111936 A CN 01111936A CN 1320741 A CN1320741 A CN 1320741A
- Authority
- CN
- China
- Prior art keywords
- equipment
- rotor
- equipment according
- cone
- screen cloth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
- D21D5/023—Stationary screen-drums
- D21D5/026—Stationary screen-drums with rotating cleaning foils
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Combined Means For Separation Of Solids (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Centrifugal Separators (AREA)
Abstract
The present invention relates to a screen 1 for cleaning a pulp suspension. It is mainly characterized by an additional screen basket 11 being provided in the infeed area for pre-screening.
Description
The present invention relates to a kind of screen cloth that is used to clean pulp suspension.
Screen cloth is a kind of equipment that is used in the paper industry, is used to clean the pulp suspension of being made up of water, fiber and dirt particle.When doing this work, incoming flow is sent to screen cloth equipment top, makes the acceptance stream that comprises water and fiber through screen cloth.That a part is made up of water, fiber and foul particle and be called as the liquid that abandons stream and flow and to be discharged from from being positioned at the end opposite with incoming flow.Use screen cloth, the particle that floats on a liquid is separated.Opposite with the filtration that liquid separates with solid.Generally, this screen cloth is designed to rotation-symmetric, and the shell of charging, the basket of a cylinder type that mainly has hole or perpendicular elongate hole and the rotor of a rotation are formed by a tangential direction configuration.The task of rotor is to keep the elongated hole of screen cloth unimpeded, and this can accomplish by using near the screen surface rotating blades.Accepting stream is accumulated in the so-called normally conical receptive cavity and at some point and is radially extracted out.Abandon circulation and often be directed into the basket opposite one side, and enter the normally ring-like chamber that abandons, tangentially be drawn out of from the described chamber that abandons with charging.Such screen cloth for example can be from U.S. Pat 4,268, knows in 381.The defective of this type screen cloth is, when hanging down flow velocity, in the big relatively blocked risk of generation in the chamber that abandons.Also occur simultaneously flowing to the uneven turbulent flow phenomenon of basket and the uneven flox condition in the receptive cavity, particularly drain the zone at receptive cavity.
The objective of the invention is to improve the flox condition in the screen cloth,, increase productivity ratio, increase the removing of dirt so that reduce energy loss.
The invention is characterized in feed zone and settle an extra basket that is used for prescreen.This allows to obtain good drainage in machine.
A progress of the present invention is: extra basket rotates with rotor, and extra basket may also be fixed.
A modification of the present invention is: have rotating blades at preselected area, described blade can be positioned in the incoming flow or accept in the stream.
A progress of the present invention is: the feed zone between the free end of tubulose branch road and rotor, settle a kind of stationary device, and described device can be rotated design symmetrically.Thereby, improved flox condition, reduced energy loss.
A progress of the present invention is: described device is ball-type part, the paraboloid between cone, the cone of clipping the top, dome-type, ball-type part, two the parallel cylinders, the hyperboloid of two sheet materials.
A modification of the present invention is: as a kind of cone or clip the device of the cone at top, cone angle is 10 °～60 °, and the axis of charging branch road is parallel to coniform shell.
An excellent modification of the present invention is: described device is the conveyor screw shape, selects spirochetal spacing like this, above whole sieve plate width, makes the constant flow rate of feed zone.
A progress of the present invention is: described device is settled by central authorities.
An excellent modification of the present invention is: receptive cavity is designed to double cone shape.
A progress of the present invention is: screen cloth is designed to the two-shipper device.
A progress of the present invention is: rotor is passed through in charging vertically.
An excellent modification of the present invention is: the paper pulp that the height of the rotor portion of described driving side is equal to or greater than another driving side enters and the height of the rotor portion that passes through.
An excellent modification of the present invention is: charging is carried out to central authorities from the side.
A progress of the present invention is: have two and accept scavenge port.
An excellent modification of the present invention is the horizontal setting screen cloth.
A progress of the present invention is: in feed zone, have a kind of basket that is used for prescreen that rotates with rotor, in described prescreen zone, may have rotating blades.
A progress of the present invention is: rotor has and severally is positioned on the differing heights and/or is configured in blade on the circumference.
Hereinafter will be described example of the present invention in conjunction with the accompanying drawings.
Fig. 1 has shown a kind of modification of the present invention, is a viewgraph of cross-section that shows the prescreen of one;
Fig. 2 has shown another kind of modification of the present invention;
Fig. 3 has shown another kind of modification of the present invention;
Fig. 4 is a kind of two-shipper device design;
Fig. 5 is a chart, has shown the specific energy contrast of the liquid stream of sieve plate top;
Fig. 6 is a chart, shown the contrast of line point minimizing of the liquid stream of sieve plate top.
Fig. 1 has shown the top of screen cloth 1 of the prescreen with a kind of one of arranged perpendicular.By charging branch road 2, paper pulp is transported to screen cloth 1.In order to get rid of heavy particle at preselected area, on the top of screen cloth 1 preselected area 10 is set, the paper pulp that enters described preselected area is by sieve plate 11.Pulp suspension flows to inner from the outside.This can remove the particle of specific weight and big pollutant effectively, and described big pollutant is produced by dirty or very dirty paper pulp.At rotor 12 of external stability of sieve plate 11, just at feed side, by an extension 13, described rotor 12 links to each other with rotor 4.In another kind of scheme, rotor can turn round in sieve plate portion.Heavy particle is by branch road 14 and from preselected area.In preselected area 10, rotor 12 can or accepted running in the stream in incoming flow (as shown in the figure), carries out finer screening in the bottom of screen cloth 1.If rotor 12 turns round in incoming flow, the rotation cleaning blade of rotor 12 is avoided full-bodied heavy particles hit and is damaged sieve plate 11.
Pass through centrifugal action, specific weight is foundered the outside, and this makes the basket in preselected area have long service life, on the other hand, also have the predetermined predetermined fence that occurs with preliminary election basket form as a kind of firm obstacle, make above-mentioned weight enter centrifugal column screening zone.This means for this reason and accept rotor that the stage rotates in the longer time of turbulent edge load, and stand less wearing and tearing and energy consumption first, can the surface of controlled more close sieve plate 5 on and do not cause the damage of rotor or sieve plate.Compare with common screening installation, separating of dietary fibres and small material causes increasing performance (production capacity and efficient increase).In order to obtain high productivity ratio, modification can be designed to biconical rotor.Said structure can be realized good and easy the sealing and a good passage that is used to clean.
Fig. 2 has shown a kind of screen cloth 1, and pulp suspension is transported on the described screen cloth by charging branch road 2 and cleans.In feed zone, a device 3 is set, display unit 3 is a cone of topping among the figure.Rotor 4 is pointed at " top " of described cone of topping.For the deflection of the best, the angle of the flank α of the cone of topping is preferably 10 °～60 °.Pulp suspension enters the zone between rotor 4 and the sieve plate 5, and is sent to receptive cavity 6 by sieve plate.The shell of receptive cavity 6 is designed to a biconial, just trending towards abandoning on the direction in chamber from the top edge of accepting outlet 7, the shell taper is tilted, and conical cone angle is designed like this, promptly when imaginary uniform liquid stream passes through sieve plate, keep constant flow velocity.
For this purpose, the rotor 4 of screen cloth 1 is designed to uniform screen cloth turbulent flow, is necessary to reduce thickening characteristics along the short transverse of sieve plate.The shape of described rotor is parabolic type preferably, this means that the uniform liquid stream in a kind of imagination passes through under the sieve plate situation, and it is constant that the axial flow velocity in basket keeps.Another kind of scheme is that rotor shapes can be near a kind of taper.
In order to ensure the suitable discharging that abandons stream, design abandons the chamber like this, under the situation that is with or without the extra agitation energy that appearance causes by rotor, makes flow velocity more than 2.5m/sec.In fact this avoided obstruction.
Fig. 3 has shown a kind of screen cloth 1 of similar configuration, and charging branch road 2 is settled like this, promptly carries suspension along the direction of the shell that is parallel to the cone 3 of topping.This means that the normal energy loss that occurs is reduced under the fluid diversion situation.
Fig. 4 has shown a kind of design that is used to high productivity ratio as the top machine.For this reason, rotor for example is designed to double-paraboloid line style 4,4 ' or biconical rotor.Also provide two abandon outlet 8,8 ' and screen cloth indigo plant 5,5 '.Also adopt this moment diconical receptive cavity 6,6 ', this means that in this case shell tilts about the direction that trends towards abandoning the chamber from the top edge of accepting stream floss hole 7 greatly.Pulp suspension is admitted to by charging branch road 2, in illustrated structure, axially passes through rotor.For this turbulent flow, the height L1 of driving side rotor portion 4 be equal to or greater than rotor portion 4 ' height L2, liquid flow to into and by described rotor portion 4 ', described rotor portion 4 ' relative with described driving side.By the mouth 9 of middle body, suspension from rotor portion 4 ', and on both direction, be assigned with.The same with an independent screen cloth, it by basket 5,5 ' enter receptive cavity 6,6 ', receptive cavity also is designed to double cone shape.In the case, abandon flow downward on the flow direction and by abandon the outlet 8, the 8 ' device of disembarking.In another kind of structure, can be from the side to the middle body charging.Have two receptive cavity scavenge ports, one at the top (7 '), one in the bottom (7) or independent one in central authorities.Screening installation can be designed to horizontal.
Fig. 5 has shown the chart of sieve plate top by the energy requirement of-liquid stream, and what curve was represented is the screen cloth of prior art, another expression be a kind of screen cloth that has conical device in feed zone according to the invention.
Fig. 6 is presented at the minimizing of pass through of sieve plate top-line point that liquid flows.As we can see from the figure, have a kind of conical device, can improve the minimizing of line point, reduce the particular energy loss in same stage in feed zone.
Claims (22)
1. a screen cloth that is used to clean pulp suspension is characterized in that: settle an extra basket (11) that is used for prescreen in feed zone.
2. equipment according to claim 1 is characterized in that: extra basket (11) rotates with rotor (12).
3. equipment according to claim 1 is characterized in that: extra basket (11) is fixed.
4. according to the described equipment of one of claim 1～3, it is characterized in that: have rotating blades at preselected area (10).
5. equipment according to claim 4 is characterized in that: described blade is positioned in the incoming flow.
6. equipment according to claim 4 is characterized in that: described blade is positioned in to be accepted in the stream.
7. according to the described equipment of one of claim 1～6, it is characterized in that: the feed zone between the free end of tubulose branch road (2) and rotor (4), settle a kind of stationary device (3).
8. equipment according to claim 7 is characterized in that: described device (3) is rotated design symmetrically.
9. equipment according to claim 8 is characterized in that: described device (3) is ball-type part, the paraboloid between cone, the cone of clipping the top, dome-type, ball-type part, two the parallel cylinders, the hyperboloid of two sheet materials.
10. equipment according to claim 8 is characterized in that: as a kind of cone or clip the device (3) of the cone at top, cone angle is 10 °～60 °
11. equipment according to claim 10 is characterized in that: the axis of charging branch road (2) is parallel to coniform shell.
12. equipment according to claim 7 is characterized in that: described device (3) is the conveyor screw shape.
13. equipment according to claim 11 is characterized in that: select spirochetal spacing like this, above whole sieve plate width, make the constant flow rate of feed zone.
14. according to the described equipment of one of claim 7～13, it is characterized in that: described device (3) is settled by central authorities.
15. according to the described equipment of one of claim 1～13, it is characterized in that: receptive cavity (6) is designed to double cone shape.
16. according to the described equipment of claim 1～15, it is characterized in that: screen cloth (1) is designed to the two-shipper device.
17. equipment according to claim 16 is characterized in that: charging is vertically by rotor (4).
18. equipment according to claim 17 is characterized in that: the height of the rotor portion of described driving side (4) is equal to or greater than the height of the rotor portion (4 ') of another driving side, and paper pulp enters and passes through rotor portion (4 ').
19. equipment according to claim 18 is characterized in that: charging is carried out to central authorities from the side.
20., it is characterized in that: have two and accept scavenge port (7,7 ') according to the described equipment of one of claim 16～19.
21., it is characterized in that: horizontal setting screen cloth (1) according to the described equipment of one of claim 1～20.
22. according to the described equipment of one of claim 1～21, it is characterized in that: rotor (4,4 ') has and severally is positioned on the differing heights and/or is configured in blade on the circumference.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA166/2000 | 2000-02-03 | ||
| AT0016600A AT408771B (en) | 2000-02-03 | 2000-02-03 | SORTER FOR CLEANING A FIBER SUSPENSION |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1320741A true CN1320741A (en) | 2001-11-07 |
| CN1180160C CN1180160C (en) | 2004-12-15 |
Family
ID=3653490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011119365A Expired - Lifetime CN1180160C (en) | 2000-02-03 | 2001-02-02 | Screen mesh |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1122358B2 (en) |
| CN (1) | CN1180160C (en) |
| AT (2) | AT408771B (en) |
| BR (1) | BR0100352A (en) |
| CA (1) | CA2332679A1 (en) |
| DE (1) | DE50106745D1 (en) |
| ES (1) | ES2246260T5 (en) |
| MX (1) | MXPA01001293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110787517A (en) * | 2019-11-28 | 2020-02-14 | 广东吉康环境***科技有限公司 | Sludge drying pretreatment device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10115298A1 (en) * | 2001-03-28 | 2002-10-17 | Voith Paper Patent Gmbh | Pressure sorter for removing contaminants from a paper fiber suspension containing contaminants |
| AT413390B (en) | 2003-03-27 | 2006-02-15 | Andritz Ag Maschf | SORTER FOR CLEANING A FIBER SUSPENSION |
| AT413110B (en) * | 2003-10-15 | 2005-11-15 | Andritz Ag Maschf | SORTER |
| CN113648693B (en) * | 2021-07-14 | 2022-12-27 | 安徽金星钛白（集团）有限公司 | Primary filter for preventing blockage during blanking of metatitanic acid storage tank |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3053391A (en) * | 1959-08-17 | 1962-09-11 | Bird Machine Co | Apparatus for screening |
| US4302327A (en) * | 1980-03-17 | 1981-11-24 | The Black Clawson Company | Center flow screening apparatus |
| DE3703831A1 (en) * | 1987-02-07 | 1988-09-08 | Voith Gmbh J M | PLASTIC SORTER |
| SE464640B (en) * | 1988-06-16 | 1991-05-27 | Kamyr Ab | DEVICE FOR SILENCE OF A SUSPENSION OF A FIBER CELLULOSAMASSA |
| FI902968A (en) * | 1990-06-13 | 1991-12-14 | Sunds Defibrator Jylha Oy | SIKTENHET FOER SORTERING AV MASSOR, SAERSKILT PAPPERSMASSA. |
| DE4135854A1 (en) * | 1991-10-31 | 1993-05-06 | J.M. Voith Gmbh, 7920 Heidenheim, De | SORTER |
| FI93979C (en) * | 1993-08-20 | 1995-06-26 | Tampella Oy Valmet | Method and pressure sorter for sorting pulp |
| US5575395A (en) * | 1994-07-15 | 1996-11-19 | A. Ahlstrom Corporation | Method and apparatus for screening fibrous suspensions |
| US5884774A (en) * | 1996-03-11 | 1999-03-23 | Aikawa Iron Works Co., Ltd. | Papermaking screen |
| SE507481C2 (en) * | 1996-05-02 | 1998-06-15 | Alfa Laval Ab | Device for separating impurities from fiber pulp suspensions |
| SE511786C2 (en) * | 1998-03-06 | 1999-11-22 | Sunds Defibrator Ind Ab | Screening device with two screening chambers for separating fiber suspensions |
-
2000
- 2000-02-03 AT AT0016600A patent/AT408771B/en not_active IP Right Cessation
-
2001
- 2001-01-25 DE DE50106745T patent/DE50106745D1/en not_active Expired - Lifetime
- 2001-01-25 AT AT01101559T patent/ATE299965T1/en not_active IP Right Cessation
- 2001-01-25 ES ES01101559T patent/ES2246260T5/en not_active Expired - Lifetime
- 2001-01-25 EP EP01101559A patent/EP1122358B2/en not_active Expired - Lifetime
- 2001-01-30 CA CA002332679A patent/CA2332679A1/en not_active Abandoned
- 2001-02-02 MX MXPA01001293A patent/MXPA01001293A/en active IP Right Grant
- 2001-02-02 CN CNB011119365A patent/CN1180160C/en not_active Expired - Lifetime
- 2001-02-05 BR BR0100352-6A patent/BR0100352A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110787517A (en) * | 2019-11-28 | 2020-02-14 | 广东吉康环境***科技有限公司 | Sludge drying pretreatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE299965T1 (en) | 2005-08-15 |
| ES2246260T5 (en) | 2008-05-01 |
| EP1122358B1 (en) | 2005-07-20 |
| DE50106745D1 (en) | 2005-08-25 |
| CN1180160C (en) | 2004-12-15 |
| ES2246260T3 (en) | 2006-02-16 |
| MXPA01001293A (en) | 2005-08-16 |
| AT408771B (en) | 2002-03-25 |
| BR0100352A (en) | 2001-10-02 |
| EP1122358A3 (en) | 2001-11-21 |
| EP1122358A2 (en) | 2001-08-08 |
| ATA1662000A (en) | 2001-07-15 |
| CA2332679A1 (en) | 2001-08-03 |
| EP1122358B2 (en) | 2008-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20041215 |
|
| CX01 | Expiry of patent term |