Application of a Device for Uniform Web Drying and Preheating Using Microwave Energy

Ahrens, Frederick W. ; Habeger, C. ; Loughran, J. ; Patterson, T.

Institute of Paper Science and Technology

关键词: Economics;    Drying;    32 Energy Conservation, Consumption, And Utilization;    Maintenance;    Design;   

DOI  :  10.2172/816299
RP-ID  :  DOE/ID/13872
RP-ID  :  FC07-00ID13872
RP-ID  :  816299

美国|英语

来源: UNT Digital Library

【 摘 要 】

The project summarized in this report dealt with an evaluation of new microwave applicator ideas for paper preheating and drying. The technical basis for success in this project is the fact that Industrial Microwave Systems has recently identified certain previously unrecognized wave guide ''design variables'' and hardware implementation concepts that can be employed to greatly improve the uniformity of microwave energy distribution for continuous flow processes. Two applicator concepts were ultimately evaluated, a Cross-Machine Direction (CD) oriented applicator and a Machine Direction (MD) oriented applicator. The economic basis for success is the result of several factors. Since 1985, the capital expenditure required for an industrial microwave applicator system has decreased by a factor of four. The maintenance costs have decreased by a factor of 10 and the life expectancy of the magnetron has increased by more than a factor of four to in excess of 8,000 hours (nearly one year at 24 hours/day operation).