EFFICIENT AND FLEXIBLE CLEAN COAL-FIRED POWER GENERATION SYSTEM HAVING ADAPTIVE CONFIGURATION, AND OPERATING METHOD

摘要

Disclosed are an efficient and flexible clean coal-fired power generation system having an adaptive configuration, and an operating method. Said system uses an arrangement manner in which different stages of economizers and separated parallel flue gas channels are provided, and is provided with flue gas regulation baffles and regulation valves; the economizer is provided with a water feed regulation valve group; the flow of heat exchange between flue gas and a working medium can be regulated by means of the water feed regulation valve group, thereby precisely controlling an inlet temperature of an SCR denitration apparatus. Moreover, cascade utilization of energy is achieved by adjusting the flow ratio of an air preheater to front economizers, increasing the energy utilization efficiency in a flexible operating mode. The present invention can be used for flexibility modification, energy conservation and emission reduction, and newly-built unit design of a coal-fired power station.