| 摘要 |
FIELD: power engineering; combined-cycle plants with fluidized-bed circulating furnaces burning solid fuels, such as lignite. SUBSTANCE: partial flow of stack gases is conveyed to operating lower stoichiometric region of fluidized-bed furnace upstream of secondary air supply device 5, or else boiler operates in low stoichiometric similar to gasifier and for secondary burning clean air is supplied to stack gas after cleaning. For implementing this process, combustible gas channel 15 is introduced in operating stoichiometric region of fluidized-bed furnace upstream of secondary air supply device 5, or air duct upstream of boiler is divided into partial controlled ducts. One partial duct is inserted in fluidized-bed furnace and other one, into stack-gas channel or into secondary burning. EFFECT: provision for obtaining and using high-energy stack gases, that is, obtaining optimal secondary burning of stack gases to ensure maximum temperature at gas turbine inlet. |
