Drying of fiber webs
Abstract
A process and an apparatus for high-intensity drying of fiber webs or sheets, such as newsprint, printing and writing papers, packaging paper, and paperboard or linerboard, as they are formed on a paper machine. The invention uses direct contact between the wet fiber web or sheet and various molten heat transfer fluids, such as liquified eutectic metal alloys, to impart heat at high rates over prolonged durations, in order to achieve ambient boiling of moisture contained within the web. The molten fluid contact process causes steam vapor to emanate from the web surface, without dilution by ambient air; and it is differentiated from the evaporative drying techniques of the prior industrial art, which depend on the uses of steam-heated cylinders to supply heat to the paper web surface, and ambient air to carry away moisture, which is evaporated from the web surface. Contact between the wet fiber web and the molten fluid can be accomplished either by submersing the web within a molten bath or by coating the surface of the web with the molten media. Because of the high interfacial surface tension between the molten media and the cellulose fiber comprising the paper web, the molten media does notmore »
- Inventors:
-
- 9253 Glenoaks Blvd., Sun Valley, CA 91352
- Issue Date:
- Research Org.:
- Harvest Energy Technology, Sun Valley, CA
- OSTI Identifier:
- 870898
- Patent Number(s):
- 5619806
- Assignee:
- Warren, David W. (9253 Glenoaks Blvd., Sun Valley, CA 91352)
- Patent Classifications (CPCs):
-
D - TEXTILES D21 - PAPER-MAKING D21F - PAPER-MAKING MACHINES
F - MECHANICAL ENGINEERING F26 - DRYING F26B - DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- DOE Contract Number:
- FG03-95ER81982
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- drying; fiber; webs; process; apparatus; high-intensity; sheets; newsprint; printing; writing; papers; packaging; paper; paperboard; linerboard; formed; machine; direct; contact; wet; web; sheet; various; molten; heat; transfer; fluids; liquified; eutectic; metal; alloys; impart; rates; prolonged; durations; achieve; ambient; boiling; moisture; contained; fluid; causes; steam; vapor; emanate; surface; dilution; air; differentiated; evaporative; techniques; prior; industrial; depend; steam-heated; cylinders; supply; carry; evaporated; accomplished; submersing; bath; coating; media; interfacial; tension; cellulose; comprising; appreciately; stick; dried; generated; collected; condensed; allow; recovery; significantly; temperature; levels; attainable; dryers; paper web; temperature levels; heat recovery; transfer fluid; ambient air; direct contact; heat transfer; metal alloy; metal alloys; surface tension; evaporative drying; supply heat; interfacial surface; fiber webs; fiber web; fluid contact; cellulose fiber; writing paper; drying techniques; /34/162/
Citation Formats
Warren, David W. Drying of fiber webs. United States: N. p., 1997.
Web.
Warren, David W. Drying of fiber webs. United States.
Warren, David W. Wed .
"Drying of fiber webs". United States. https://www.osti.gov/servlets/purl/870898.
@article{osti_870898,
title = {Drying of fiber webs},
author = {Warren, David W},
abstractNote = {A process and an apparatus for high-intensity drying of fiber webs or sheets, such as newsprint, printing and writing papers, packaging paper, and paperboard or linerboard, as they are formed on a paper machine. The invention uses direct contact between the wet fiber web or sheet and various molten heat transfer fluids, such as liquified eutectic metal alloys, to impart heat at high rates over prolonged durations, in order to achieve ambient boiling of moisture contained within the web. The molten fluid contact process causes steam vapor to emanate from the web surface, without dilution by ambient air; and it is differentiated from the evaporative drying techniques of the prior industrial art, which depend on the uses of steam-heated cylinders to supply heat to the paper web surface, and ambient air to carry away moisture, which is evaporated from the web surface. Contact between the wet fiber web and the molten fluid can be accomplished either by submersing the web within a molten bath or by coating the surface of the web with the molten media. Because of the high interfacial surface tension between the molten media and the cellulose fiber comprising the paper web, the molten media does not appreciately stick to the paper after it is dried. Steam generated from the paper web is collected and condensed without dilution by ambient air to allow heat recovery at significantly higher temperature levels than attainable in evaporative dryers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}
Works referenced in this record:
High-Intensity Drying of Paper
journal, May 1986
- Ahrens, F.; Astrom, A.
- Drying Technology, Vol. 4, Issue 2