Research on combustion control and heat efficiency´s online computing of slime fluidized bed boiler

With the requirements for promoting the energy saving and environmental protection, it is the main trend for fluidized bed boiler to realize combustion control and online computing of heat efficiency. In order to achieve combustion automatic control of fluidized bed boilers, and improve self-control rates and on-line monitoring of boilers´ heat efficiency. In this study, the combustion control scheme was firstly designed for a 75 tons fluidized bed boiler. the automatic control for feed water, superheated steam temperature, superheated steam pressure and oxygen were realized in the DCS system. Then the overall automatic control of combustion was achieved with advanced control technology. Next, based on the presented work, on line calculation of heat efficency was realized, witch which various parts of heat losses and total heat efficiency can be real-time monitored to guide the optimal operation of the boiler. It is very important for energy saving and power management requirements.