Development of the Circulating Fluidized Bed Combustion Technology: Studies of CFB Technology at VTI and the Justification for its Use in Russia1

Abstract

The current state of and progress in circulating fluidized bed (CFB) technology are reviewed. The CFB technology has been used industrially in the boilers of generating units with powers up to 600 MW. CFB boilers are most widely used in China. The steam parameters and unit powers of systems with CFB boilers are increasing. CFB technology has the advantage of being able to burn a wide range of fuels, including biomass and process wastes, and this is a further stimulus for the introduction of CFB boilers. Based on studies of the hydrodynamics and heat exchange in model CFB boilers and generalizations of published data on advances in the design of CFB boilers, recommendations for the basic dimensions and performance of ash collectors and recovery systems in CFB boilers have been developed at the JSC “VTI” to ensure reliable determination of the major characteristics of boiler designs. Design methods and programs have been formulated. Recent designs for advanced coal-fired central heating and power plants at VTI confirm the suitability of CFB boilers for widespread use. The first CFB boiler in Russia is being installed and tested at the 330 MW unit No. 9 of the Novocherkassk GRÉS State Regional Electric Power Plant. Experience with the installation and startup of this unit will create the conditions for widespread introduction of CFB technology in Russia.