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Design Trends and Operating Problems in Combustion Modification of Industrial Boilers

D. W. Locklin

出版	U.S. Environmental Protection Agency, 1974
URL	http://books.google.com.hk/books?id=yVNCGwAACAAJ&hl=&source=gbs_api

註釋

As a basis for R & D planning directed to the control of air-pollutant emissions, an EPA grant study was undertaken by Battelle-Columbus Laboratories (1) to characterize the current field population of industrial boilers, (2) to identify trends in boiler design, and (3) to assess operating problems associated with acombustion modification. Statistics supplied by the American Boiler Manufacturers Association were analyzed by Battelle to describe the field population and recent sales trends for firetube and watertube industrial boilers in the range from 10 million to 500 million Btu/hr. Aspects considered were boiler capacity, design type, mode of erection, primary and secondary fuels, firing method for coal, plus the industrial classification and geographic region of the boiler installation. When combustion modifications are employed to control nitrogen oxide emissions from industrial boilers, practical operating problems may arise, namely: (1) fireside corosion and deposits on boiler tubes and (2) flame instability--including blow-off, flashback, combustin-driven oscillations, and combustion noise or roat. These problems were assessd, and research needs were identified in relation to such combustion modifications as low-excess-air operation, staged combustion modification, and flue-gas recirculation.