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Drying intensity of coater air dryers is adjusted by changing air temperature and/or air velocity. Experimental findings and theoretical studies show that coating quality can be improved by biasing the temperature/velocity choice to favor raising the web temperature. Recent simulation studies find that this effect can be better accomplished by using exhaust flow as a process control parameter. It is also know that thermal efficiency can be improved by reducing exhaust flow. In most existing equipment, pressure balancing needs to take precedence in exhaust flow selection. A system is described to automate pressure balancing and free the exhaust control for other purposes. Expected performance implications are also discussed.
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Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.
The best-selling text to introduce the entire technology of pulp and paper manufacture.
A project of the Yankee Dryer Safety & Reliability Committee.
TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries.
Available for Purchase – Conference Proceedings
TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.
Options for Controlling Convective Coating Dryers, 1991 Coating Conference Proceedings