SE0004851L - Process of drying a web-shaped material - Google Patents

Process of drying a web-shaped material

Info

Publication number
SE0004851L
SE0004851L SE0004851A SE0004851A SE0004851L SE 0004851 L SE0004851 L SE 0004851L SE 0004851 A SE0004851 A SE 0004851A SE 0004851 A SE0004851 A SE 0004851A SE 0004851 L SE0004851 L SE 0004851L
Authority
SE
Sweden
Prior art keywords
air
web
water content
cylinders
steam pressure
Prior art date
Application number
SE0004851A
Other languages
Swedish (sv)
Other versions
SE518049C2 (en
SE0004851D0 (en
Inventor
Ingemar Karlsson
Original Assignee
Flaekt Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Flaekt Ab filed Critical Flaekt Ab
Priority to SE0004851A priority Critical patent/SE518049C2/en
Publication of SE0004851D0 publication Critical patent/SE0004851D0/en
Publication of SE0004851L publication Critical patent/SE0004851L/en
Publication of SE518049C2 publication Critical patent/SE518049C2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • 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
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

If a deviation from the desired dryness of the dried web (4) is detected, the water content of the air supplied to the dryer (1) is reduced, and the steam pressure inside the dryer cylinders (3) is increased in order to reduce the moisture content of the outgoing air. A method for drying a web of material, especially a paper web, comprises contacting the web with cylinders which are internally heated with steam, and removing the water vapor expelled from the web with the process air, some of which is optionally recirculated. The non-recirculated process air is replaced with a corresponding amount of hot air with a low moisture content. Steam pressure inside the cylinders and the flow of air leaving the process are regulated throughout. If a deviation from the desired dryness of the dried web is detected, the water content of the supplied air is altered, by reducing the water content of the air if the web dryness is reduced, the water content of the air is reduced, and by altering the steam pressure inside the cylinders in accordance with the water content in the outgoing air, so that dryer outgoing air will increase steam pressure (or vice versa), in order to give a desired water content in the outgoing air. The latter step is relatively slow compared to the former step.
SE0004851A 2000-12-27 2000-12-27 Drying method, especially for paper, comprises altering water content of supplied air and steam pressure inside cylinders in response to change in web moisture content SE518049C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE0004851A SE518049C2 (en) 2000-12-27 2000-12-27 Drying method, especially for paper, comprises altering water content of supplied air and steam pressure inside cylinders in response to change in web moisture content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0004851A SE518049C2 (en) 2000-12-27 2000-12-27 Drying method, especially for paper, comprises altering water content of supplied air and steam pressure inside cylinders in response to change in web moisture content

Publications (3)

Publication Number Publication Date
SE0004851D0 SE0004851D0 (en) 2000-12-27
SE0004851L true SE0004851L (en) 2002-06-28
SE518049C2 SE518049C2 (en) 2002-08-20

Family

ID=20282430

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0004851A SE518049C2 (en) 2000-12-27 2000-12-27 Drying method, especially for paper, comprises altering water content of supplied air and steam pressure inside cylinders in response to change in web moisture content

Country Status (1)

Country Link
SE (1) SE518049C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111350096B (en) * 2020-03-14 2021-10-22 台州市永丰纸业有限公司 Drying device with gas hood heating plate

Also Published As

Publication number Publication date
SE518049C2 (en) 2002-08-20
SE0004851D0 (en) 2000-12-27

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Legal Events

Date Code Title Description
NUG Patent has lapsed