EP2622130A1 - Maschine für die entwässerung von zellstoff - Google Patents
Maschine für die entwässerung von zellstoffInfo
- Publication number
- EP2622130A1 EP2622130A1 EP11751596.5A EP11751596A EP2622130A1 EP 2622130 A1 EP2622130 A1 EP 2622130A1 EP 11751596 A EP11751596 A EP 11751596A EP 2622130 A1 EP2622130 A1 EP 2622130A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine
- wire
- roller
- zone
- dewatering
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims abstract 2
- 238000004804 winding Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 210000000481 breast Anatomy 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
-
- 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
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
- D21F1/80—Pulp catching, de-watering, or recovering; Re-use of pulp-water using endless screening belts
Definitions
- the invention relates to a machine for the dewatering of pulp, comprising a former with a lower sieve and an upper sieve, which at least partially form a twin-wire zone and thereby guided with the lying between them, applied by a headbox on the lower wire pulp over a guide roller are, wherein the twin-wire zone in Sieblaufraum of the lower sieve preceded by a portion of the lower sieve Vorent camess mecanicszone is spanned, which spans a plane, wherein the guide roller has a preferably closed, grooved or drilled roll shell and is provided on the outside with a catcher for thrown off white water and wherein the guide roller in Sieblaufraum of the lower screen another, both screens leading guide roller having a preferably closed, grooved or drilled roll shell and the outside with a catcher for thrown off white water is provided, is subordinate.
- a machine is known from a variety of documents, such as for example from the document WO 2008/090052 A1.
- this disclosed machine eliminates many disadvantages of the prior art, such as a limited dewatering capacity and thus a low dry content of the pulp at the end of the former.
- the stated embodiment of the former requires an excessively large space, especially in the machine direction and thus it is particularly suitable for use with new machines that are not usually subject to the requirements of a limited, usually predetermined space.
- the creasing or the bore of the roll mantle of the respective deflection roll can be carried out in a known manner according to the prior art.
- the object of the invention to develop a machine of the aforementioned types such that the disadvantages of the prior art are overcome.
- the machine according to the invention should be suitable for conversions with limited, as a rule, predefined installation spaces, without causing any significant additional costs (conversion costs, maintenance costs, operating costs) and without bringing any technological disadvantages.
- the object of the invention is achieved in a machine of the type mentioned in that both the guide roller and the further guide roller are arranged spatially Lich above the plane spanned by the pre-dewatering zone level.
- the pre-dewatering zone defines a plane due to its two orientations in both the x and y directions. So it spans a plane.
- the inventive design of the machine provides the advantage that the two guide rollers can be arranged above the pre-dewatering section. Their dimensions therefore have no significant, preferably no influence on the machine length more.
- the former of the machine according to the invention is particularly suitable as a retrofit solution for conversions.
- the two deflection rollers preferably each have a roll diameter in the range of 800 to 1,750 mm, preferably 900 to 1,600 mm, in particular 950 to 1,500 mm ,
- the two wires preferably wrap around the first deflection roller with a first wrap angle in a range of 90 to 180 °, preferably 100 to 160 °, in particular 1 to 150 °. This, in turn, increases the drainage length and thus the dry contents of the pulp in the case of extremely gentle dewatering.
- the two wires preferably run off in the upper half of the roll from the first guide roller. They run in a favorable manner - seen in the direction of the lower wire Sieblaufraum - in the first upper quadrant from the first guide roller and in the lower half of the roller on the second guide roller.
- the second guide roller preferably with a second wrap in a range of 125 to 210 °, preferably from 130 to 200 °, in particular from 135 to 1 95 ° wrap around. This again increases the drainage length and thus the dry contents of the pulp with an extremely gentle dewatering.
- the two screens preferably run in the upper half of the roller from the second guide roller. They run in a favorable manner - seen in the direction of the lower wire Sieblaufraum - in the second upper quadrant of the second guide roller preferably together. This again favors the achievement of the shortest possible dewatering machine and the avoidance of rewetting of the pulp.
- the lower wire preferably has a lower wire tension of at least 6 kN / m, preferably of at least 8 kN / m, in particular of at least 10 kN / m.
- the upper sieve preferably has an upper sieve tension of at least 15 kN / m, preferably of at least 20 kN / m, in particular of at least 25 kN / m.
- the predewatering zone formed from a section of the lower screen preferably extends horizontally or approximately horizontally and / or preferably has a zone length of at least 5,000 mm, preferably at least 7,500 mm, in particular at least 9,000 mm , on.
- the dewatering behavior of the pulp in such an embodiment are relatively easily influenced and controlled.
- the center lines of the two deflection rollers preferably have a horizontal distance in the range from 100 to 600 mm, preferably from 200 to 500 mm, in particular from 250 to 400 mm.
- the deflecting rollers arranged in this way therefore no longer have any significant, preferably no influence on the machine length.
- the former of the machine according to the invention is particularly suitable as a retrofit solution for conversions.
- Figure 1 is a schematic side view of a preferred embodiment of a machine according to the invention for the dewatering of pulp, comprising a former;
- FIG. 2 is a detailed view of the preferred one shown in FIG.
- FIG. 1 shows a schematic side view of a machine 100 according to the invention for the dewatering of pulp 1, which comprises a former 2.
- the former 2 has a lower sieve 3 and an upper sieve 4, which at least partially form a double-wire zone 5.
- the pulp 1 lying between them which is applied by a merely indicated headbox 6 onto the lower wire 3, is guided over a deflecting roller 7.
- the twin-wire zone 5 is in the wire-width direction S (arrow) of the lower wire 3, a pre-dewatering zone 8 formed from a section of the lower wire 3. arranged, which spans a level 8.E.
- This horizontal or approximately horizontally extending pre-dewatering zone 8 has a zone length 8.L of at least 5,000 mm, preferably of at least 7,500 mm, in particular of at least 9,000 mm, and is on the underside, ie the lower sieve 3 and the pulp 1 lying thereon leading with several provided known drainage elements.
- These dewatering elements are provided with the reference numeral 9 and each generate a vacuum 9.V less than or equal to 0, 1 bar, preferably less than or equal to 0.8 bar.
- the lower sieve 3 is guided before its entry into the pre-dewatering zone 8 around a breast roll 10, in the area of which the headbox 6 applies the pulp 1 to the same.
- the deflection roller 7 has a closed, grooved or drilled roll shell 7.M and is provided on the outside with a collecting device 1 1 for thrown off white water (arrows).
- the collecting device 1 1 extends to the extent that all due to the action of centrifugal centrifugal thrown off white water (arrows) is fully collected and can be reliably removed from the former 2, for example by means not shown, the expert but well known white water gutter (see also Figure 2).
- the creasing or the bore of the roller shell 7.M of the guide roller 7 may be performed in a known manner according to the prior art.
- the guide roller 7 has a roller diameter 7. D in the range of 800 to 1 .750 mm, preferably from 900 to 1, 600 mm, in particular from 950 to 1, 500 mm, and is of the two S ieben 3, 4 m a first wrap angle 7.W in a range of 90 to 180 °, preferably from 100 to 160 °, in particular from 1 10 to 150 °, looped around.
- the two screens 3, 4 run in the upper half of the roller, preferably in the first upper quadrant 7.Q, from the first guide roller 7 (see also Figure 2).
- the order directing roller 7 is in Sieblaufraum S (arrow) of the lower wire 3 another, both wires 3, 4 leading guide roller 12, which in turn has a closed, grooved or drilled roll shell 12.M and outer sided with a catcher 13 for centrifuged white water (arrows) is provided downstream.
- This collecting device 13 also extends to such an extent that all white water (arrows) thrown off due to the action of centrifugal force is completely absorbed and can be reliably removed from the former 2, for example by means of a white water channel (not shown) known to a person skilled in the art (cf. Figure 2).
- M of the order directing roller 1 2 may be performed in a known manner according to the prior art.
- the guide roller 12 has a roller diameter 12. D in the range of 800 to 1 .750 mm, preferably from 900 to 1, 600 mm, in particular from 950 to 1, 500 mm.
- the two wires 3, 4 run in the lower half of the roll on the second guide roller 12 and wrap them with a second angle of wrap 12.W in a range of 125 to 210 °, preferably from 130 to 200 °, in particular from 135 to 195 °.
- the two wires 3, 4 in the upper half of the roller, preferably in the second upper quadrant 12.Q preferably run together from the second guide roller 12.
- both the guide roller 7 and the further guide roller 12 are arranged spatially above the plane spanned by the pre-dewatering zone 8 level 8.
- the center lines 7.C, 12C of the two guide rollers 7, 12 have a horizontal spacing A in the range from 100 to 600 mm, preferably from 200 to 500 mm, in particular from 250 to 400 mm (see also FIG ).
- the lower wire 3 has a lower wire tension 3.T of at least 6 kN / m, preferably of at least 8 kN / m, in particular of at least 10 kN / m, whereas the upper sieve 4 has an upper sieve tension 4.T of at least 15 kN / m, preferably of at least 20 kN / m, in particular of at least 25 kN / m.
- the pulp 1, which preferably has a basis weight F of 600 to 1,350 g / m 2 , preferably 950 to 1,200 g / m 2 , and / or a consistency K of 1, 0 to 2.5%, preferably 1 , 2 to 2.2%, can thus be dewatered at a wire speed v (arrow) of at least 200 m / min, preferably of at least 250 m / min, in particular of at least 300 m / min.
- the specific production of such machine 100 for dewatering pulp 1 can be up to 500 t / d per meter of web width.
- FIG. 2 shows a detailed view of the machine 100 according to the invention for the dewatering of pulp 1 shown in FIG. 1, which comprises a former 2.
- the deflection roller 7 has, as already stated, a closed, grooved or drilled roll shell 7.M and is provided on the outside with a collecting device 1 1 for thrown off white water (arrows).
- the collecting device 1 1 extends to the extent that all due to the action of centrifugal centrifugal force thrown white water (arrows) is fully collected and can be reliably removed from the former 2, for example by means not shown, the expert but well known white water channel.
- the guide roller 7 has a roller diameter 7.
- D in the range of 800 to 1 .750 mm, preferably from 900 to 1, 600 mm, in particular from 950 to 1, 500 mm, and is of the two S ieben 3, 4 m a first wrap angle 7.W in a range of 90 to 180 °, preferably from 100 to 160 °, in particular from 1 10 to 150 °, looped around.
- the deflection roller 7 is, as already stated, in Sieblaufraum S (arrow) of the lower wire 3 another, both wires 3, 4 leading guide roller 12, which in turn has a closed, grooved or drilled roll shell 12 M and the outside with a catcher 13th is provided for centrifuged white water (arrows), downstream.
- This collecting device 13 also extends to such an extent that all white water (arrows) thrown off due to the action of centrifugal force is completely absorbed and can be reliably removed from the former 2, for example by means of a white water channel, not shown to those skilled in the art.
- the guide roller 12 has a roller diameter 12. D in the range of 800 to 1 .750 mm, preferably from 900 to 1, 600 mm, in particular from 950 to 1, 500 mm.
- the two wires 3, 4 run in the lower half of the roller on the second guide roller 12 and wrap around it with a second angle of wrap 12.W in a range of 125 to 210 °, preferably from 130 to 200 °, in particular from 135 to 195 °.
- the two wires 3, 4 in the upper half of the roller, preferably in the second upper quadrant 12.Q preferably run together from the second guide roller 12.
- the two screens 3, 4 are separated by means of a known separating device, such as a separating sucker 14 or a separating roller, and the twin-wire zone 5 is thus terminated (see also Figure 1).
- both the guide roller 7 and the further guide roller 12 are arranged spatially above the plane spanned by the pre-dewatering zone 8 level 8.
- the center lines 7.C, 12C of the two guide rollers 7, 12 have a horizontal distance A in the range of 100 to 600 mm, preferably from 200 to 500 mm, in particular from 250 to 400 mm.
- a machine of the type mentioned above is improved by the invention so that the disadvantages of the prior art are overcome.
- the machine according to the invention is suitable for conversions with limited, generally predetermined installation spaces, causes no significant additional costs (conversion costs, maintenance costs, operating costs) and does not entail any technological disadvantages.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010041730A DE102010041730A1 (de) | 2010-09-30 | 2010-09-30 | Maschine für die Entwässerung von Zellstoff |
| PCT/EP2011/064940 WO2012041624A1 (de) | 2010-09-30 | 2011-08-31 | Maschine für die entwässerung von zellstoff |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2622130A1 true EP2622130A1 (de) | 2013-08-07 |
| EP2622130B1 EP2622130B1 (de) | 2014-07-30 |
Family
ID=44543242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11751596.5A Not-in-force EP2622130B1 (de) | 2010-09-30 | 2011-08-31 | Maschine für die entwässerung von zellstoff |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2622130B1 (de) |
| CN (1) | CN103154363A (de) |
| BR (1) | BR112013007047A2 (de) |
| DE (1) | DE102010041730A1 (de) |
| WO (1) | WO2012041624A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013143713A1 (de) * | 2012-03-28 | 2013-10-03 | Voith Patent Gmbh | Maschine für die entwässerung von zellstoff |
| DE102018121032A1 (de) * | 2018-08-29 | 2019-06-13 | Voith Patent Gmbh | Verfahren zum entwässern von zellstoff |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI761030A7 (de) * | 1976-04-14 | 1977-10-15 | Valmet Oy | |
| WO1982002910A1 (en) * | 1981-02-28 | 1982-09-02 | Zag Heinz | Device for continuously dehydrating a fiber web |
| SE458212B (sv) * | 1987-07-17 | 1989-03-06 | Valmet Paper Machinery Inc | Formare foer formning av en pappersbana |
| CN2557570Y (zh) * | 2002-07-07 | 2003-06-25 | 李风宁 | 一种夹网成形器 |
| DE102007000036A1 (de) | 2007-01-25 | 2008-07-31 | Voith Patent Gmbh | Verfahren zum Entwässern von Zellstoff und Entwässerungsmaschine zur Durchführung des Verfahrens |
| CA2657627A1 (en) * | 2009-03-10 | 2010-09-10 | Services Techniques Hds | Twin wire press |
-
2010
- 2010-09-30 DE DE102010041730A patent/DE102010041730A1/de not_active Withdrawn
-
2011
- 2011-08-31 BR BR112013007047A patent/BR112013007047A2/pt not_active IP Right Cessation
- 2011-08-31 WO PCT/EP2011/064940 patent/WO2012041624A1/de not_active Ceased
- 2011-08-31 CN CN2011800474144A patent/CN103154363A/zh active Pending
- 2011-08-31 EP EP11751596.5A patent/EP2622130B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012041624A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2622130B1 (de) | 2014-07-30 |
| DE102010041730A1 (de) | 2012-04-05 |
| WO2012041624A1 (de) | 2012-04-05 |
| BR112013007047A2 (pt) | 2017-07-25 |
| CN103154363A (zh) | 2013-06-12 |
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