EP1413359A1 - Procédé et dispositif pour séparer les matières lourdes d'une suspension fibreuse - Google Patents
Procédé et dispositif pour séparer les matières lourdes d'une suspension fibreuse Download PDFInfo
- Publication number
- EP1413359A1 EP1413359A1 EP03018966A EP03018966A EP1413359A1 EP 1413359 A1 EP1413359 A1 EP 1413359A1 EP 03018966 A EP03018966 A EP 03018966A EP 03018966 A EP03018966 A EP 03018966A EP 1413359 A1 EP1413359 A1 EP 1413359A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- suspension
- inlet
- reject discharge
- heavy parts
- 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.)
- Ceased
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 32
- 239000000463 material Substances 0.000 title claims description 5
- 239000000835 fiber Substances 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- 239000010893 paper waste Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract 2
- 238000011084 recovery Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
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
- D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
- D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
- B04C5/081—Shapes or dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
Definitions
- the invention relates to a method according to the preamble of claim 1.
- Methods of this type are able to concentrate heavy parts in fiber suspensions by centrifugal forces and to lead them out of the apparatus used through a discharge opening provided for this purpose. As a rule, they serve to remove metal parts, glass fragments and stones.
- operational safety in particular the freedom from blockage of such apparatus, is particularly important. Blockages can occur if the contaminants accumulate and concentrate in the device without getting into the heavy part discharge opening. In many cases a compromise must be found between operational safety, i.e. the avoidance of blockages, on the one hand, and the highest possible effectiveness of the machine (throughput, separation effect), on the other hand.
- hydrocyclones are used when carrying out processes of the type mentioned above, which, as is known, already exist in a large variety and size.
- Hydrocyclones are also called conical centrifuges in the field of activity of paper makers, which can be attributed to the fact that their housing is wholly or at least partially conical in order to improve the separation effect.
- the suspension rotating in the hydrocyclone is accelerated on its axial path from the inlet to the reject opening (swirl maintenance). In this way, not only the loss of speed due to friction can be compensated, but also an increase in the peripheral speed can be achieved.
- No. 5,651,466 shows a device with an adjustable inlet part, a cylindrical housing part and an axis-parallel heavy part outlet.
- the invention is based on the object of improving the known methods, in particular those in which hydrocyclones have hitherto been used, in such a way that both an operationally reliable manner of operation is possible and also good separation of the heavy parts.
- the heavy parts considered here are transported down a helical path along the inner wall to the bottom of the housing (in the case of a vertical arrangement) and are removed there by a heavy part discharge which is at an angle to the axis.
- the wear-promoting rotation of heavy parts on the bottom of the device is reliably avoided.
- the suspension S through the inlet 2 into the housing 1 intended for carrying out the method is introduced.
- the inflowing suspension S is set in rotation within the housing, for which purpose the inlet 2 is generally connected tangentially to the housing 1.
- the flow cross section of the inlet 2 determines the inflow speed as a function of the volume throughput, which is advantageously 2 to 10 m / s. It can be nozzle-shaped.
- the heavy parts present in the suspension S are enriched on the inner wall of the housing 1 and reach the reject discharge 7 in a substantially helical path 18.
- the heavy parts R are then discharged from the housing as a reject, which is preferably via a Lock 7 'is done.
- the accept substance A - that is to say the suspension largely freed from heavy parts - is discharged through an accept substance outlet 3 located in the center of the housing 1.
- a sedimentation section 6 is provided between the inlet 2 and the reject discharge 7, which is generally between 0.5 and 2 m.
- Inlet 2 and reject discharge 7 are preferably located (as here) at the axially opposite ends of housing 1.
- the 2 shows a typical application of the method according to the invention, ie a location in the plant for the processing of waste paper.
- the materials M for example waste paper, water and chemicals, are introduced into a pulper 12 and dissolved therein.
- the suspension thus formed is often drawn off through a pulp screen which has openings with a diameter between 8 and 20 mm.
- coarse impurities R ' such as plastic films and large heavy parts, are separated with the aid of a sieve, which is provided with holes from 4 to 12 mm, for example.
- the suspension S thus pre-cleaned then passes into a separating device 16 for carrying out the method according to the invention with the housing 1 already described, in which the accept A is formed.
- the process is advantageously applied relatively early in the course of waste paper processing to the subsequent equipment such as fine sorters, grinding and de-stippling units to protect against heavy parts.
- the type of dissolution and pre-sorting can also deviate from the example shown in FIG. 2, for example according to FIG. 3 in a rotating dissolving drum 14 and a rotating sorting drum 15 for coarse sorting which follows for the solute.
- a sorting drum that can be used here advantageously has sorting holes with a diameter of 8-12 mm.
- FIG. 3 also shows an advantageous embodiment of the method, in which a plurality of separation devices 16 according to the invention are used.
- two separating devices 16 form a first stage, the rejects of which are continuously drawn off and guided into a second stage.
- the separating device 16 forming the second stage which can be similar in terms of equipment or the same as that of the first stage, has a water-rinsed heavy part lock 19 for discharging a largely fiber-free heavy part / water mixture.
- the reject discharge 7 is round with a radial inner width 5, which is smaller here than half the inner diameter 4 of the housing 1.
- the reject discharge 7 is arranged eccentrically to the housing 1. This means that its center line 9 has an offset in relation to the center line 8 of the housing 1 in the connecting plane between the housing 1 and the reject discharge 7. It is particularly favorable if the inner wall 10 of the reject discharge is connected directly to the inner wall 11 of the housing 1 at one point.
- the reject discharge 7 is connected to the housing 1 in such a way that its center line 9 has an angle ⁇ to the center line 8 of the housing 1 that deviates from zero.
- This angle ⁇ is preferably 20 to 40 °. This inclination removes the heavy parts that have arrived at the bottom of the housing quickly and safely, even when a lock is connected, i.e. when no constant current is drawn.
- FIG. 5 shows a device according to the invention, similar to that in FIG. 4, in the viewing direction rotated by 90 °.
- a simple tangential inlet 2 is shown here.
- the direction of the reject discharge 7 is such that it corresponds to the direction of rotation of the suspension S in the housing 1. 6 shows this somewhat more clearly when viewed from above. It can also be seen there that the reject discharge 7 is set tangentially.
- the typical arrangement of a separating device suitable for the method is the perpendicular, that is to say that the center line 8 of the housing 1 is perpendicular or almost perpendicular.
- the centrifugal forces such an arrangement also uses gravitational acceleration to separate heavy parts.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Centrifugal Separators (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10249112 | 2002-10-22 | ||
| DE10249112 | 2002-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1413359A1 true EP1413359A1 (fr) | 2004-04-28 |
Family
ID=29414349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03018966A Ceased EP1413359A1 (fr) | 2002-10-22 | 2003-08-21 | Procédé et dispositif pour séparer les matières lourdes d'une suspension fibreuse |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1413359A1 (fr) |
| DE (1) | DE20312890U1 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006032427A1 (fr) * | 2004-09-22 | 2006-03-30 | Voith Patent Gmbh | Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede |
| CN108067045A (zh) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | 一种除雾设备 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1069116B (de) * | 1952-09-24 | 1959-11-19 | Nichols Engineering S. Research Corporation, New- York, N. Y. (V.St.A.) | Verfahren und Vorrichtung zum Abscheiden von feste Stoffe enthaltenden Faserstoffaufschwemmungen an einem Hydrozyklon |
| US3578786A (en) * | 1968-07-09 | 1971-05-18 | Skardal Karl Arvid | Discharge device for the bottom fraction at a vortex-type separator |
| DE4240048A1 (de) * | 1992-11-28 | 1994-06-01 | Knecht Filterwerke Gmbh | Staubaustragventil |
| US5651466A (en) * | 1994-11-21 | 1997-07-29 | Satomi Seisakusho Co., Ltd. | Swirl type foreign material removing machine and method of removing foreign material by the machine |
| WO2001042556A1 (fr) * | 1999-12-09 | 2001-06-14 | Upm-Kymmene Corporation | Procede de tamisage et tamis pour pate a papier |
-
2003
- 2003-08-21 DE DE20312890U patent/DE20312890U1/de not_active Expired - Lifetime
- 2003-08-21 EP EP03018966A patent/EP1413359A1/fr not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1069116B (de) * | 1952-09-24 | 1959-11-19 | Nichols Engineering S. Research Corporation, New- York, N. Y. (V.St.A.) | Verfahren und Vorrichtung zum Abscheiden von feste Stoffe enthaltenden Faserstoffaufschwemmungen an einem Hydrozyklon |
| US3578786A (en) * | 1968-07-09 | 1971-05-18 | Skardal Karl Arvid | Discharge device for the bottom fraction at a vortex-type separator |
| DE4240048A1 (de) * | 1992-11-28 | 1994-06-01 | Knecht Filterwerke Gmbh | Staubaustragventil |
| US5651466A (en) * | 1994-11-21 | 1997-07-29 | Satomi Seisakusho Co., Ltd. | Swirl type foreign material removing machine and method of removing foreign material by the machine |
| WO2001042556A1 (fr) * | 1999-12-09 | 2001-06-14 | Upm-Kymmene Corporation | Procede de tamisage et tamis pour pate a papier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006032427A1 (fr) * | 2004-09-22 | 2006-03-30 | Voith Patent Gmbh | Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede |
| CN108067045A (zh) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | 一种除雾设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE20312890U1 (de) | 2003-10-30 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
Effective date: 20041028 |
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| AKX | Designation fees paid |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOITH PATENT GMBH |
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| 17Q | First examination report despatched |
Effective date: 20060928 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
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| 18R | Application refused |
Effective date: 20070324 |