High-intensity drying processes impulse drying: Report two
Impulse drying is under study as an alternative to conventional cylinder drying of paper and paperboard. Work over the past year has found the following: Impulse drying reduces drying energy requirements to as little as 500 Btu per pound of water. The specific energy requirement decreases with increasing initial sheet moisture content. Water removal rates are far greater than attainable with conventional drying. Impulse drying produces substantial increases in density. Impulse drying improves strength properties. The increase in tensile strength and STFI compressive index for recycled fiber and high-yield pulp linerboard is particularly significant. The z-direction density profile produced by impulse drying can offset the decline of certain properties such as opacity and tear strength which would be expected from increases in average density. A pilot roll impulse dryer has been designed and is presently under construction.
- Research Organization:
- Institute of Paper Chemistry, Appleton, WI (USA)
- DOE Contract Number:
- FG02-85CE40738
- OSTI ID:
- 7007713
- Report Number(s):
- DOE/CE/40738-T2; ON: DE87004107
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PAPER
DRYING
PAPER INDUSTRY
ENERGY CONSERVATION
DENSITY
MECHANICAL PROPERTIES
MOISTURE
RESEARCH PROGRAMS
WATER REMOVAL
INDUSTRY
PHYSICAL PROPERTIES
REMOVAL
WOOD PRODUCTS INDUSTRY
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes