WO2006072507A1 - Trockenzylinder - Google Patents
Trockenzylinder Download PDFInfo
- Publication number
- WO2006072507A1 WO2006072507A1 PCT/EP2005/056151 EP2005056151W WO2006072507A1 WO 2006072507 A1 WO2006072507 A1 WO 2006072507A1 EP 2005056151 W EP2005056151 W EP 2005056151W WO 2006072507 A1 WO2006072507 A1 WO 2006072507A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drying cylinder
- drying
- fibrous web
- cladding layer
- layer
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/022—Heating the cylinders
- D21F5/027—Heating the cylinders using a heat-transfer fluid between the heating means and the cylinder shell
Definitions
- the invention relates to a drying cylinder for drying a paper, board, tissue or another fibrous web in a machine for producing and / or finishing the same with a carrier body and an outer jacket layer which is heated by a hot fluid.
- drying arrangements with such drying cylinders have long been known, the fibrous web, which, supported by a drying wire, wraps around.
- the contact of the fibrous web with the hot jacket surface causes the heating and, in particular, after the removal from the drying cylinder to evaporate.
- the drying rate is essentially limited by the jacket thickness and thus the thermal resistance of the drying cylinder.
- the object of the invention is therefore to increase the heat flow through the outer cladding layer.
- this object is achieved in that between the support body and the outer cladding layer at least one cavity is present, through which the fluid flows and the outer cladding layer is predominantly so thin that the quotient of the thermal conductivity of the material and the thickness of the outer cladding layer greater as a limit, for steel 3.2 kW / m 2 K, for aluminum - 2 -
- the support body preferably extends axially over the entire drying cylinder and ensures sufficient stability of the same. This leads to a substantial relief of the supporting function of the outer jacket layer, so that it can be made much thinner.
- the outer cladding layer must only support itself and absorb the internal pressure of the fluid in the cavity. Depending on the design and extent of the drying cylinder and the support of the outer cladding layer results in a minimum thickness for the outer cladding layer.
- the upper limit of the thickness of the cladding layer is determined by the o.g. Limit value given.
- the outer jacket layer should be supported by tie rods on the support body. This can about struts, partitions o.a. take place, with fixed or positive connections are possible.
- the support body carries an inner cladding layer, the like with the outer cladding layer via connecting elements such as webs, fins o.a. is connected, wherein the cavity between the outer and the inner cladding layer is formed.
- the fluid is vapor and the pressure in the cavity is preferably between 1, 5 and 13 bar, it will suffice to make the outer jacket layer with a thickness between 5 and 15 mm.
- Jacket layer of advantage these profiled inside, preferably grooved perform.
- the quotient should be outside the tie rods or fasteners above the corresponding limit and / or at more than 60%, preferably more than 75% of the outer surface of the outer cladding layer, the quotient at least on average greater than the corresponding limit.
- a preferred application of the heated drying cylinder results in addition to the replacement of conventional drying cylinders in drying arrangements for a fibrous web, in which at least one water-absorbing band wraps around the drying cylinder together with the fibrous web, the fibrous web comes into contact with the drying cylinder and another, outer, dense band is cooled in the wrap of the drying cylinder.
- the steam resulting from the heating of the fibrous web during contact with the heated drying cylinder passes into the water-absorbing ribbons surrounding the fibrous web when the drying cylinder is wrapped around. These tapes cause condensation and storage of the condensate.
- the dense band wraps around the drying cylinder, preventing steam from escaping.
- This dense band is usually cooled, so as to specify by the gain of the temperature gradient to the heated drying cylinder towards the direction of evaporation from the fibrous web and to enhance the condensation of the vapor.
- the fibrous web is pressed by a belt, preferably a dryer, with a strip tension of at least 10, preferably at least 20 kN / m on the outer surface of the drying cylinder.
- FIG 1 a schematic cross section through a drying cylinder 4, Figure 2. another drying cylinder 4 and
- Figure 3 a cross section through a drying arrangement.
- the essential feature of the drying cylinder 4 according to the invention is a very thin outer jacket layer 7, which is stabilized by a supporting body 8 of the drying cylinder 4.
- the quotient A of the thermal conductivity ⁇ and the jacket thickness s is greater than 3.2 kW / m 2 K.
- the thickness of the outer jacket layer 7 is therefore between 4 and 18 mm.
- the loss of stability compensates for the support body 8, which extends axially over the entire drying cylinder 4. - 5 -
- the vapor in the cavities has a pressure between 1, 5 and 10 bar and flows axially through the cavities 12.
- this cladding layer 7 has ribs 10 which protrude from the condensate layer.
- the support body 8 is formed as a thick-walled cylinder jacket, which limits the cavities 12 at the same time.
- the cavities 12 in Figure 2 are bounded by an inner 11 and an outer 7 cladding layer.
- As stabilizing connecting elements 6 between these cladding layers 7,11 sidewalls are used.
- the inner cladding layer 11 is supported by the support body 8.
- FIG. 3 shows a preferred application of the drying cylinder 4 in a drying arrangement in which the fibrous web 1, together with at least one water-absorbing band 2 and an outwardly dense band 3, wraps around the drying cylinder 4.
- the dense band 2 is cooled during the wrapping of a hood 5 with water.
- the heating of the fibrous web 1 during contact with the outer jacket layer 7 of the drying cylinder 4 leads to evaporation and condensation of the liquid in the water-absorbing belt 2. This is from - 6 -
Landscapes
- Drying Of Solid Materials (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0518106-2A BRPI0518106A (pt) | 2005-01-05 | 2005-11-22 | cilindro secador |
JP2007548796A JP4633801B2 (ja) | 2005-01-05 | 2005-11-22 | 乾燥シリンダ |
EP05811125A EP1838921A1 (de) | 2005-01-05 | 2005-11-22 | Trockenzylinder |
US11/769,819 US7802377B2 (en) | 2005-01-05 | 2007-06-28 | Drying cylinder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005000782.1 | 2005-01-05 | ||
DE102005000782A DE102005000782A1 (de) | 2005-01-05 | 2005-01-05 | Trockenzylinder |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/769,819 Continuation US7802377B2 (en) | 2005-01-05 | 2007-06-28 | Drying cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006072507A1 true WO2006072507A1 (de) | 2006-07-13 |
Family
ID=35708377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/056151 WO2006072507A1 (de) | 2005-01-05 | 2005-11-22 | Trockenzylinder |
Country Status (8)
Country | Link |
---|---|
US (1) | US7802377B2 (de) |
EP (1) | EP1838921A1 (de) |
JP (2) | JP4633801B2 (de) |
CN (1) | CN101094953A (de) |
BR (1) | BRPI0518106A (de) |
DE (1) | DE102005000782A1 (de) |
RU (1) | RU2372434C2 (de) |
WO (1) | WO2006072507A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US8056255B2 (en) * | 2007-01-16 | 2011-11-15 | Ctb, Inc. | Manure removal and drying system |
US9605900B2 (en) * | 2015-04-22 | 2017-03-28 | Ricoh Company, Ltd. | Adjustable interlacing of drying rollers in a print system |
KR20160149608A (ko) * | 2015-06-18 | 2016-12-28 | 동부대우전자 주식회사 | 건조 장치 및 그 제조 방법 |
CN105928400B (zh) * | 2016-06-22 | 2017-10-20 | 陈龙阵 | 一种间壁换热回转设备的密封定向集中传热装置 |
US9994049B1 (en) | 2017-02-13 | 2018-06-12 | Ricoh Company, Ltd. | Adjustable path length of print media in a dryer of a printing system |
US9908342B1 (en) | 2017-02-26 | 2018-03-06 | Ricoh Company, Ltd. | Concentric arrangement of web conditioning modules in a dryer of a print system |
CN106931750B (zh) * | 2017-04-25 | 2022-08-09 | 平罗县兴东肉牛养殖专业合作社 | 一种牛肉高效烘干装置 |
CN109403122A (zh) * | 2018-12-28 | 2019-03-01 | 安德里茨(中国)有限公司 | 连续式干燥烘缸 |
CN114857902B (zh) * | 2022-04-24 | 2023-05-23 | 湖北长江汇丰纸业有限公司 | 一种半干式节能烘干装置及烘干方法 |
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2005
- 2005-01-05 DE DE102005000782A patent/DE102005000782A1/de not_active Withdrawn
- 2005-11-22 EP EP05811125A patent/EP1838921A1/de not_active Withdrawn
- 2005-11-22 WO PCT/EP2005/056151 patent/WO2006072507A1/de active Application Filing
- 2005-11-22 RU RU2007129851/12A patent/RU2372434C2/ru not_active IP Right Cessation
- 2005-11-22 CN CNA2005800458771A patent/CN101094953A/zh active Pending
- 2005-11-22 BR BRPI0518106-2A patent/BRPI0518106A/pt not_active IP Right Cessation
- 2005-11-22 JP JP2007548796A patent/JP4633801B2/ja not_active Expired - Fee Related
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2007
- 2007-06-28 US US11/769,819 patent/US7802377B2/en not_active Expired - Fee Related
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2010
- 2010-09-21 JP JP2010210831A patent/JP2011047643A/ja active Pending
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Also Published As
Publication number | Publication date |
---|---|
CN101094953A (zh) | 2007-12-26 |
JP2011047643A (ja) | 2011-03-10 |
RU2372434C2 (ru) | 2009-11-10 |
BRPI0518106A (pt) | 2008-11-04 |
EP1838921A1 (de) | 2007-10-03 |
RU2007129851A (ru) | 2009-02-20 |
US7802377B2 (en) | 2010-09-28 |
DE102005000782A1 (de) | 2006-07-20 |
JP2008527289A (ja) | 2008-07-24 |
JP4633801B2 (ja) | 2011-02-16 |
US20070294914A1 (en) | 2007-12-27 |
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