CN1180160C - Screen mesh - Google Patents
Screen mesh Download PDFInfo
- Publication number
- CN1180160C CN1180160C CNB011119365A CN01111936A CN1180160C CN 1180160 C CN1180160 C CN 1180160C CN B011119365 A CNB011119365 A CN B011119365A CN 01111936 A CN01111936 A CN 01111936A CN 1180160 C CN1180160 C CN 1180160C
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- CN
- China
- Prior art keywords
- equipment according
- rotor
- equipment
- screening installation
- cone
- 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.)
- Expired - Lifetime
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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)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Combined Means For Separation Of Solids (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
Technical field
The present invention relates to a kind of screening installation that is used to clean pulp suspension.
Background technology
Screening installation 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 screening installation equipment top, makes the good slurry that comprises water and fiber through screening installation.A part is discharged from from being positioned at the end opposite with incoming flow by water, fiber and foul particle liquid stream that form and that be called as screenings.Use screening installation, the particle that floats on a liquid is separated.Opposite with the filtration that liquid separates with solid.Generally, this screening installation 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 screening installation unimpeded, and this can accomplish by using near screening installation surface rotating blades.It is indoor and radially extracted out at some point that good slurry is accumulated in so-called normally conical good slurry.Screenings is directed into the basket opposite with charging one side usually, and enters normally ring-like screenings chamber, tangentially is drawn out of from described screenings chamber.Such screening installation for example can be from U.S. Pat 4,268, knows in 381.The defective of this type screening installation is when hanging down flow velocity, in the indoor meeting of big relatively screenings blocked risk to take place.Simultaneously, particularly very starching drainage zone, chamber, liquid fails to be convened for lack of a quorum and flows into basket unevenly, and very starches the uneven flox condition of indoor meeting generation.
Summary of the invention
The objective of the invention is to improve the flox condition in the screening installation,, increase productivity ratio, increase the removing of dirt so that reduce energy loss.
The invention provides a kind of screening installation that is used to clean pulp suspension, have a rotor, a fixing column basket and a good oar chamber and a slag-drip opening that is arranged on the outside, wherein pulp suspension is admitted to the inside of basket, and the feed zone on screening installation top is provided with a preselected area that has extra sieve plate.
According to the present invention, allow in machine, to obtain good drainage.
A progress of the present invention is: extra sieve plate rotates with rotor, and extra sieve plate may also be fixed.
A modification of the present invention is: have rotating blades at preselected area, described blade can be positioned in the interior or good slurry of incoming flow.
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 truncated cone, dome-type, ball-type part, two the parallel cylinders, the hyperboloid of two sheet materials.
A modification of the present invention is: described device is a cone or the truncated cone, and the angle of the flank of this cone or the truncated cone (α) 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, spirochetal spacing is chosen to make along whole sieve plate width the constant flow rate of feed zone.
A progress of the present invention is: described device is settled between two parties.
An excellent modification of the present invention is: very the chamber of slurry is designed to double cone shape.
A progress of the present invention is: screening installation is designed to the active/standby devices type.
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 good slurry outlets.
An excellent modification of the present invention is the horizontal setting screening installation.
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.
Description of drawings
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 active/standby devices 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 that the spot of the liquid stream of sieve plate top reduces.
The specific embodiment
Fig. 1 has shown the top of screening installation 1 of the prescreen with a kind of one of arranged perpendicular.By charging branch road 2, paper pulp is transported to screening installation 1.In order to get rid of heavy particle at preselected area, on the top of screening installation 1 preselected area 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 leaves preselected area by branch road 14.In preselected area, rotor 12 can carry out finer screening in the bottom of screening installation 1 in incoming flow (as shown in the figure) or running in good slurry.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 column centrifugal screening zone.The rotor that this means for this reason and rotate in the first good slurry section is in the longer time of turbulent edge load, and stands less wearing and tearing and energy consumption, can the surface of controlled more close basket 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 screening installation 1, and pulp suspension is transported on the described screening installation 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 basket 5, and is sent to good slurry chamber 6 by sieve plate.The shell of good slurry chamber 6 is designed to a biconial, just trending towards on the direction of screenings 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 screening installation 1 is designed to make fluid to flow through screening installation equably, and this just need reduce thickening characteristic 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 discharging of suitable screenings, design the screenings chamber like this, under the situation that is with or without the extra agitation energy that appearance causes by rotor, make flow velocity more than 2.5m/sec.In fact this avoided obstruction.
Fig. 3 has shown a kind of screening installation 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 large-duty top machine.For this reason, rotor for example is designed to double-paraboloid line style 4,4 ' or biconical rotor.Also provide two screenings outlet 8,8 ' and basket 5,5 '.Also adopt this moment diconical good slurry chamber 6,6 ', this means that in this case shell tilts about the direction that the top edge of the slurry outlet 7 of getting married and start a new life trends towards the screenings chamber 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 opening 9 of middle body, suspension leave rotor portion 4 ', and on both direction, be assigned with.The same with an independent screening installation, it by basket 5,5 ' enter good slurry chamber 6,6 ', very the chamber of slurry also is designed to double cone shape.In the case, screenings upwards flows downward and by screenings outlet 8,8 ' leave machine.In another kind of structure, can be from the side to the middle body charging.Have two and very starch out, 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 screening installation of prior art, another expression be a kind of screening installation that has conical device in feed zone according to the invention.
Fig. 6 is presented at the minimizing of the spot that passes through liquid stream of sieve plate top.As we can see from the figure,, can significantly reduce spot, and reduce the particular energy loss in same stage by conical device being set in feed zone.
Claims (22)
1. screening installation that is used to clean pulp suspension, have a rotor, a fixing column basket and a good oar chamber and a slag-drip opening that is arranged on the outside, wherein pulp suspension is admitted to the inside of basket, it is characterized in that: the feed zone on screening installation (1) top is provided with a preselected area that has extra sieve plate (11).
2. equipment according to claim 1 is characterized in that: extra sieve plate (11) rotates with rotor (12).
3. equipment according to claim 1 is characterized in that: extra sieve plate (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.
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 the good slurry.
7. according to the described equipment of one of claim 1～3, it is characterized in that: the feed zone between the free end of charging branch road (2) and rotor (4), settled a 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 cone, the truncated cone, dome-type, ball-type part, paraboloid, hyperboloid.
10. equipment according to claim 8 is characterized in that: described device (3) is a cone or the truncated cone, and the angle of the flank of this cone or the truncated cone (α) 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: spirochetal spacing is chosen to make that the flow velocity of feed zone keeps constant along whole sieve plate width.
14. equipment according to claim 7 is characterized in that: described device (3) is settled between two parties.
15., it is characterized in that: very starch chamber (6) and be designed to double cone shape according to the described equipment of one of claim 1～3.
16. according to the described equipment of claim 1～3, it is characterized in that: screening installation (1) is designed to the active/standby devices type.
17. equipment according to claim 16 is characterized in that: charging connects rotor (4) vertically and carries out.
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 rotor portion (4 ') of the opposite side that has paper pulp to flow into and flow through of drive unit.
19. equipment according to claim 18 is characterized in that: charging is carried out to central authorities from the side.
20. equipment according to claim 16 is characterized in that: have two good slurry outlets (7,7 ').
21. according to the described equipment of one of claim 1～3, it is characterized in that: screening installation (1) is by horizontal setting.
22. according to the described equipment of one of claim 1～3, it is characterized in that: rotor (4,4 ') has a plurality of be positioned on the differing heights and/or along the blade of circumference configuration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0016600A AT408771B (en) | 2000-02-03 | 2000-02-03 | SORTER FOR CLEANING A FIBER SUSPENSION |
| ATA166/2000 | 2000-02-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1320741A CN1320741A (en) | 2001-11-07 |
| CN1180160C true 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) |
Families Citing this family (5)
| 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 |
| CN110787517B (en) * | 2019-11-28 | 2020-10-30 | 广东吉康环境系统科技有限公司 | Sludge drying pretreatment device |
| 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 EP EP01101559A patent/EP1122358B2/en not_active Expired - Lifetime
- 2001-01-25 ES ES01101559T patent/ES2246260T5/en not_active Expired - Lifetime
- 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
- 2001-01-30 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
Also Published As
| Publication number | Publication date |
|---|---|
| AT408771B (en) | 2002-03-25 |
| ATE299965T1 (en) | 2005-08-15 |
| DE50106745D1 (en) | 2005-08-25 |
| CN1320741A (en) | 2001-11-07 |
| EP1122358B1 (en) | 2005-07-20 |
| EP1122358B2 (en) | 2008-01-02 |
| ES2246260T3 (en) | 2006-02-16 |
| BR0100352A (en) | 2001-10-02 |
| MXPA01001293A (en) | 2005-08-16 |
| ATA1662000A (en) | 2001-07-15 |
| EP1122358A2 (en) | 2001-08-08 |
| CA2332679A1 (en) | 2001-08-03 |
| ES2246260T5 (en) | 2008-05-01 |
| EP1122358A3 (en) | 2001-11-21 |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20041215 |