EP0427802A1 - Gerät zum sortieren und entstippen von fasersuspensionen. - Google Patents
Gerät zum sortieren und entstippen von fasersuspensionen.Info
- Publication number
- EP0427802A1 EP0427802A1 EP90903349A EP90903349A EP0427802A1 EP 0427802 A1 EP0427802 A1 EP 0427802A1 EP 90903349 A EP90903349 A EP 90903349A EP 90903349 A EP90903349 A EP 90903349A EP 0427802 A1 EP0427802 A1 EP 0427802A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- zone
- sieve
- sorting
- fiber suspension
- 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
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 96
- 239000000725 suspension Substances 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 17
- 230000008719 thickening Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000012216 screening Methods 0.000 abstract 1
- 238000010790 dilution Methods 0.000 description 9
- 239000012895 dilution Substances 0.000 description 9
- 239000008237 rinsing water Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000035613 defoliation Effects 0.000 description 3
- 239000010812 mixed waste Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
-
- 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
-
- 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
- D21D5/20—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in apparatus with a horizontal axis
Definitions
- the invention relates to a device for sorting and deflaking fiber suspensions, in particular a so-called pressure-free sorter for heavily soiled fiber suspensions, such as are obtained as rejects from a wide variety of sorting systems.
- the invention was therefore based on the object of creating a sorting device which is also suitable for processing heavily soiled fiber suspensions and which fulfills the requirement for a fiber content of as high as possible dry matter.
- EP-0 235 605-A2 discloses a sorting device in which the speck content of the fiber suspension to be processed is reduced and which is said to give a rejects of relatively high dry matter content.
- This sorting device has a housing surrounding a rotor with a horizontal axis, with a larger-diameter inlet-side housing part and a smaller-diameter outlet-side housing part.
- the rotor In the inlet-side housing part, the rotor has a first rotor zone which is designed as an impeller of relatively large diameter and is intended to deflop, while a second rotor zone located in the outlet-side housing part is designed as a cylinder of substantially smaller diameter and is surrounded by a cylindrical sieve.
- a device for sorting and deflaking fiber suspensions which has a housing surrounding a rotor arranged with a lying axis, which in a front housing end area has an inlet for the fiber suspension to be processed, in a central one Area below has an accept material outlet for the sorted fiber suspension,., And in a rear housing end area below, a reject material outlet.
- the rotor has the shape of a plank, approximately barrel-shaped, rotationally symmetrical body and has three zones lying one behind the other in the direction of the rotor axis, namely an inlet-side first rotor zone, a middle, second rotor zone and an outlet-side third rotor zone.
- first and third rotor zones web-like accelerator bars are attached to the rotor circumference in order to accelerate the fiber suspension in the circumferential direction, while the second rotor zone is provided on the circumference with ribs running in the axial direction, which are designed in such a way that they together with a rotor in A small, radial spacing sieve cylinder unfurl.
- the first rotor zone causes dewatering of the fiber suspension with simultaneous excretion of good material, ie the first rotor zone is a sorting and dewatering zone
- the second rotor zone causes the fiber suspension to deflop
- usable fibers are washed out of the rejects and sorted out, for which purpose in the radial direction from the outside Dilution water inlet is directed to the screen cylinder.
- the rejects leave the device housing behind the rotor through the rejects outlet already mentioned.
- a device for sorting and deflaking fiber suspensions which has a housing which has an inlet for the in a front housing end region Processing fiber suspension, furthermore has an accept material outlet for the sorted fiber suspension and a rejects outlet and in which a rotor with a lying axis is rotatably mounted, which has several zones, one behind the other, surrounded by annular spaces with different functions, in the direction of the rotor axis, one of which is on the inlet side first rotor zone and a last one, that at a rear housing end region arranged rotor area facing rotor zone are provided with entrainment elements for the fiber suspension, the last rotor zone is surrounded by an annular sieve and a deflowering rotor zone located upstream of this last rotor zone has bumps causing deflashing, between the first and the last rotor zone a further rotor zone surrounded by an
- the first rotor zone is surrounded by the housing wall which, apart from the inlet arranged above, is closed for the fiber suspension to be processed and the mouth of the heavy dirt outlet is, the specifically heavy dirt particles are centrifuged out of the fiber suspension in the device according to the invention before they can lead to wear on a sieve and the rotor parts enclosed by the sieve;
- the fiber suspension set in rapid circulation by the rotor throws the heavy dirt particles onto the housing wall, where they slide down along this wall and get there into the outlet for the specifically heavy dirt particles.
- a rotor arranged with an almost lying axis is surrounded over its entire length by a sieve cylinder;
- An inlet for the fiber suspension to be processed is provided at one end of the device housing, which is likewise arranged with an almost horizontal axis and is approximately cylindrical, an outlet for the accept material is located outside the sieve cylinder and a reject material outlet is provided at the other end of the device housing.
- An inlet-side first rotor zone is provided with acceleration vanes for the fiber suspension, a second rotor zone with transport vanes conveying the fiber suspension in the axial direction and a third rotor zone with centrifugal vanes arranged on the rotor circumference.
- the first rotor zone is used for sorting the fiber suspension, the second for washing out the fiber suspension (by means of wash water outlet openings provided in the rotor jacket), and in the third rotor zone the rejects are dewatered.
- This known device is foreign to the genus because it is not a deflaking device. Furthermore, it does not solve the task because it has no means for removing specifically heavy dirt particles before the fiber suspension enters an annular space between a rotor and a sieve.
- Another device of non-generic type (DE-38 20 366-A), in which the fiber suspension is also not deliped, is a device for
- Cellulose sorting which has a rotor arranged concentrically to the housing in an approximately circular cylindrical housing arranged with a horizontal axis.
- the fiber suspension to be processed is introduced into the device parallel to the axis at one end of the housing, specifically into a chamber which is formed by the housing wall which is closed on the circumference.
- this chamber there is a first rotor zone designed as a toothed disk, to which a second, circular cylindrical rotor zone is connected, which forms a narrow annular gap directly behind the toothed disk with a housing partition, the outer diameter of which is smaller than the outer diameter of the.
- Toothed washer Rib-like vanes extending in the axial direction are placed on the second rotor zone.
- An inlet-side first area of the second rotor zone is surrounded by an area of the housing wall designed as a sieve, so that the fiber suspension is sorted in this area, while a second area of the second rotor zone facing away from the device inlet is surrounded by a closed area of the housing wall, into which from above a reject outlet opens.
- a dilution water connection leads through the sieve.
- the toothed disk should be designed so that undesired solid dirt particles are struck by the toothed disk and thrown back in the radial direction outwards and in the direction of the device inlet, in order to prevent the dirt particles from entering the annular gap behind the toothed disk.
- the different rotor zones do not necessarily have to be formed by one and the same rotor. There may also be another rotor zone in front of the first rotor zone, e.g. one without entrainment elements for the fiber suspension.
- the device according to the invention is expediently designed in such a way that all rotor zones are formed by a single, drum-shaped rotor and all screens by a rotationally symmetrical screen basket.
- DE-AS 26 11 886 by the applicant has disclosed a device for sorting, deflaking and re-sorting a fiber suspension, which has a drum-shaped rotor arranged with a lying axis in a housing with a circular cylindrical sieve. At one end of the housing there is an inlet for the fiber suspension to be processed, at the other end a rejects outlet, and in between the housing has a gutters outlet at the bottom and a dilution water connection at the top, adjacent to the rejects outlet.
- the periphery of the rotor is provided in a first and a third rotor zone adjacent to the inlet or the reject outlet with strip-like driver elements for the fiber suspension running parallel to the rotor axis, and in a second one, between the In the first and third rotor zones, the rotor zone is arranged on its circumference with a gear-like hoop, the teeth of which cause the fiber suspension to be deflashed.
- all dirt particles, including the specifically heavy ones, which cause heavy wear get between the rotor and the screen cylinder, and the reject material leaving the device contains a relatively large amount due to the dilution water inlet in the region of the third rotor zone Water.
- a rotor zone designed as a fiber washing zone is provided between the sorting zone and the rejects thickening zone, which is surrounded by an annular sieve and which is assigned a wash water inlet directed towards the rotor.
- the usable fibers are washed out of the stripped fiber suspension and pass as a good material through the sieve surrounding this rotor zone, so that the reject material leaving the device is largely fiber-free.
- the device according to the invention is preferably a pressure-free sorting device, it is advisable to provide the rotor in the sorting zone or in the fiber washing zone on its periphery with driving elements for the fiber suspension, the latter against the respective sieve push. If these entrainment elements are formed with sharp edges, they also have a defoliation effect, and in the fiber washout zone they promote the distribution of the washing water and the washing out of the useful fibers from the rejects.
- the driving elements are particularly effective when they are designed as webs or sheets projecting like wings from the rotor circumference.
- the deflasking effect depends essentially on the radial Distance of the elevations or webs from the respective sieve.
- the radial distance of the webs from the respective sieve is approximately 1/2 to approximately 5 mm and preferably 1/2 to approximately 1 mm.
- Embodiments in which the height of the webs can be adjusted to the rotor circumference are particularly advantageous.
- the fiber suspension to be processed flows into the device housing with a certain geodetic inlet height, which is in particular 1 to 4 m WS - is an advantageous embodiment the housing inlet for the fiber suspension to be processed is oriented approximately tangentially and the rotor can be driven in the direction of the inlet flow, so that the inlet flow already leads to a rotational flow of the fiber suspension between the rotor and the housing wall.
- fleece-like fiber accumulations form on the inlet side of the screens, which hinder the sorting effect, it is advisable to have the entrainment elements arranged on the rotor circulate as close as possible to the screen in question.
- Another measure to prevent clogging of the sieve openings is to assign rinsing water inlets to the sieve of the sorting zone in order to clean the sieve openings.
- the different sieves can have sieve openings of the same size and shape. However, it is more advantageous to provide the sieve of the sorting zone with finer sieve openings than the sieve of the fiber wash-out zone, in order firstly to obtain a good material of the highest possible quality and secondly to lead all possible fibers through the sieve in the wash-out zone. Finally, when it comes to thickening the rejects, i.e. To withdraw water only from this, finer sieve openings can be used again, so that in a preferred embodiment the sieve of the rejecting-thickening zone has finer sieve openings than the sieve of the fiber washing zone.
- the length of stay of the fiber suspension to be processed in the various zones of the device depends on the feed quantity per unit of time, the amounts of washing or rinsing water supplied per unit of time, the inclination of the webs relative to the rotor axis and the speed of the rotor. It is therefore advisable to make the webs adjustable in their inclination relative to a surface line of the rotor circumference.
- the fiber suspension located in this zone is in any case displaced by the fresh fiber suspension flowing in, it is recommended that allow the webs in the first rotor zone to run approximately parallel to the surface lines of the rotor circumference, while the webs in the rotor zones following the first rotor zone can be inclined relative to the surface lines of the rotor circumference in such a way that they have a conveying effect in the direction of the rear face ⁇ end of the housing.
- the webs of the last rotor zone protrude rearward over the sieve into a rejects space formed by the housing, so that the rejects in these Space is thrown into the rotor.
- FIG. 2 shows a section along the line 2-2 in Fig.1.
- Figure 3 is a section along the line 3-3 in Figure 1;
- Fig. 5 is a plan view of a • l'eil of Rotor ⁇ circumference. 1 shows a housing mounted on a frame 10 and designated as a whole by 12, which has an outer housing jacket 14 and is closed on the left by an end wall 16 according to FIG. 1. A right end wall 18 has an opening 22 which is concentric with an axis 20 and carries a rejects box 24 which has an outlet opening 26 for the rejects at the bottom.
- the frame 10 also carries a drive motor 28 and a bearing body 30, in which a rotor shaft 32 is rotatably mounted. This is concentric to the device axis 20, carries a pulley 34 and is set in rotation by means of this, drive belt 36 and a pulley 38 of the motor 28, namely in the counterclockwise direction according to FIGS. 2 and 3.
- a hollow, circular-cylindrical rotor 40 is fastened on the rotor shaft 32 and has end walls with end walls
- wing sets 50 1 to 504 are assigned to 4 zones I, II, III and IV of the device or of the rotor 40, namely - from left to right according to FIG. 1 - a heavy parts separation zone I, a sorting and de-stripping zone II, one Wash-out zone III and a drainage zone IV.
- adjacent wings in the circumferential direction of the wing are assigned to 4 zones I, II, III and IV of the device or of the rotor 40, namely - from left to right according to FIG. 1 - a heavy parts separation zone I, a sorting and de-stripping zone II, one Wash-out zone III and a drainage zone IV.
- a tangentially oriented inlet connection 54 for the fiber suspension to be processed opens into the housing 12, and according to the invention this inlet connection is arranged at the top of the housing.
- the rotor 40 is only encompassed by the outer housing jacket 14, into which a vertically oriented outlet connection 56 for specifically heavy dirt particles opens.
- a heavy parts pot 58 to which a dilution water line 60 is connected. Valves closing the heavy parts pot 58 at the top and bottom are denoted by 62 and 64 ', a valve for the dilution water line 60 has been denoted by 66.
- the housing 12 receives a circular cylindrical screen cylinder 68, the screen openings of which are finer in the sorting and deflaking zone II and in the dewatering zone IV than in the washout zone III.
- 68 rinsing water channels 70 are fastened on the outside of the screen cylinder and are fed via a rinsing water line 74 provided with a valve 72.
- the sieve cylinder 68 has no sieve openings, but only spray openings 76 at certain points, according to the invention only in the sorting and de-stippling zone II and in the washout zone III, during the Drainage zone IV no rinse water is supplied.
- An accepting material space 78 delimited by the screen cylinder 68 and the outer housing jacket 14 is closed according to FIG. 1 to the right of the end wall 18 and to the left by an annular housing web 80; From the bottom, an accept material outlet connection 82 opens into the accept material space 78.
- Reusable material boxes 24 have a half-shell-shaped guide wall
- a baffle wall 88 is arranged, which causes the reject material thrown upward to be reflected obliquely to the right and downward in accordance with FIG. 1 and thus falls downward to the right of the guide wall 86 into the outlet opening 26.
- the fiber suspension flowing into the device via the inlet connection 54 is detected by the vanes 50 attached to the rotor in the heavy parts separation zone I and flung against the outer housing jacket 14.
- the specifically heavy dirt particles contained in the fiber suspension slide downward due to the force of gravity along the outer casing shell 14, where they pass over the outlet port at the lowest point of the casing 12 56 get into the heavy parts pot 58.
- a backwashing via the dilution water line 60 prevents the rejects from thickening in the heavy parts pot 58.
- the fiber suspension to be processed is thus freed from specifically heavy dirt particles, such as metal parts and the like, before it enters the annular space between the rotor 40 and the screen cylinder 68.
- Fiber suspension of ⁇ en wings 50 is detected and flung against the perforated screen cylinder 68, the screen openings of which accept, i.e. allow the fine fraction formed by usable fibers and water to pass through, while the dirt is retained in the annular space between the rotor and screen cylinder.
- the accept substance leaves the accept substance space 78 via the accept substance outlet connection 82.
- the wing 50 protruded from the screen cylinder 68, whereby a further advantage is achieved: the fibers tend to be on the inside upstream side of the
- Screen cylinder 68 to form a nonwoven fabric, which would hinder the flow of the material through the screen cylinder.
- the intensity of the defibration work caused by the wings 50 can be influenced, which is achieved between the wing edges and the channels of the sieve openings by impact and shear effects.
- the inclination of the blades relative to the device axis 20 or to the casing line of the rotor 40 can also be adjusted.
- the fiber suspension or the dirt can be transported faster or more slowly through the annular space between rotor 40 and screen cylinder 68 to the right screen cylinder end according to FIG. 1.
- the vanes 50 are preferably arranged axially, i.e. without an angular adjustment, since the axial transport of the fiber suspension in the direction of rejects box 24 is effected by the subsequent flowing fiber suspension.
- the sieve cylinder openings are cleaned, inter alia, by the rinsing water supplied via the rinsing water channels 70 and the spray openings 76. After most of the fibers suspended and separated in the water have passed through the sieve cylinder openings, rinsing water is increasingly supplied to the rejects in the washout zone III in order to wash the useful fibers still contained in the rejects from the dirt and then through the
- Wing 50 3 well distributed. These vanes 503 are mounted on the rotor at an angle corresponding to the desired dwell time in the washout zone III.
- the wings 50 are formed in one piece over the entire length of the drainage zone IV.
- the dewatered rejects leaves the device via the outlet opening 26 of the rejects box 24.
- the wings are turned negative there, i.e. so that they work in the sense of a return effect.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90903349T ATE92554T1 (de) | 1989-02-18 | 1990-02-07 | Geraet zum sortieren und entstippen von fasersuspensionen. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3904960 | 1989-02-18 | ||
| DE3904960A DE3904960A1 (de) | 1989-02-18 | 1989-02-18 | Geraet zum sortieren und entstippen von fasersuspensionen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0427802A1 true EP0427802A1 (de) | 1991-05-22 |
| EP0427802B1 EP0427802B1 (de) | 1993-08-04 |
Family
ID=6374382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90903349A Expired - Lifetime EP0427802B1 (de) | 1989-02-18 | 1990-02-07 | Gerät zum sortieren und entstippen von fasersuspensionen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0427802B1 (de) |
| CA (1) | CA2027564A1 (de) |
| DE (2) | DE3904960A1 (de) |
| WO (1) | WO1990009480A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5096127A (en) * | 1990-08-22 | 1992-03-17 | Ingersoll-Rand Company | Apparatus for pressurized screening of a fibrous material liquid suspension |
| DE102018122808A1 (de) * | 2018-09-18 | 2020-03-19 | Voith Patent Gmbh | Steuerverfahren einer Reinigungsvorrichtung mit Schwerteil-Abscheider |
| CN110479740B (zh) * | 2019-08-26 | 2021-12-28 | 西藏瑞华资本管理有限公司 | 一种采用引向收刮原理的卫生巾纤维分离设备 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3437204A (en) * | 1965-12-27 | 1969-04-08 | Bird Machine Co | Screening apparatus |
| CA889156A (en) * | 1969-09-19 | 1971-12-28 | Cowan Ben | Screen impeller |
| DE2611886C3 (de) * | 1976-03-20 | 1981-09-03 | Hermann Finckh, Maschinenfabrik GmbH & Co, 7417 Pfullingen | Gerät zum Sortieren und Entstippen von Fasersuspensionen |
| DE2850385C2 (de) * | 1978-11-21 | 1981-02-05 | J.M. Voith Gmbh, 7920 Heidenheim | Vorrichtung zum Ausscheiden von Verunreinigungen aus Faserstoffsuspensionen |
| EP0235605B1 (de) * | 1986-02-18 | 1990-05-23 | J.M. Voith GmbH | Sortiereinrichtung für Fasersuspensionen |
| SE458036C (sv) * | 1987-07-03 | 1990-09-10 | Kamyr Ab | Apparat foer uppdelning av en suspension av fiberhaltig cellulosamassa |
-
1989
- 1989-02-18 DE DE3904960A patent/DE3904960A1/de not_active Withdrawn
-
1990
- 1990-02-07 DE DE9090903349T patent/DE59002193D1/de not_active Expired - Fee Related
- 1990-02-07 CA CA002027564A patent/CA2027564A1/en not_active Abandoned
- 1990-02-07 EP EP90903349A patent/EP0427802B1/de not_active Expired - Lifetime
- 1990-02-07 WO PCT/EP1990/000199 patent/WO1990009480A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9009480A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2027564A1 (en) | 1990-08-19 |
| DE59002193D1 (de) | 1993-09-09 |
| EP0427802B1 (de) | 1993-08-04 |
| DE3904960A1 (de) | 1990-08-23 |
| WO1990009480A1 (de) | 1990-08-23 |
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