Performance modeling of a pulverized coal boiler.

摘要

This dissertation described a mathematical boiler heat transfer simulation for a typical pulverized coal boiler (PCB) power plant that accounts for fouling. A PCB is designed to generate steam in the boiler tubes (heat exchangers) at pressures above that of the atmosphere. Energy for steam production is derived from a combustion process which takes place within the boiler furnace. Performance analysis of heat exchanger assemblies employed in pulverized coal boilers and gas-fired hot water boilers was presented in detail. This dissertation characterized steady-state sensible energy performance of cross flow heat exchangers using the effectiveness-NTU method. The work was motivated by the need for power utility companies to acquire on-line fouling models to determine the specific location and extent of fouling resistance, and to devise optimum soot blowing schedules. On-line slag monitoring programs are intended to provide boiler operators with reliable indications of the amounts and locations of slag buildup, so as to initiate effective cleaning action.