Patent ID: 6560956
Filing Date: 2003-05-13
Classification: F01K,Y02E

Abstract:
A power plant comprising:a) a prime mover for burning fuel and producing work and hot exhaust gases; b) a heat exchanger apparatus comprising a low pressure superheater and a pre-heater and responsive to said hot exhaust gases and to warmed pre-heated steam condensate for converting the latter into a heated water product, and for producing heat depleted exhaust gases, said low pressure superheater responsive to said hot exhaust gases and exhaust steam for converting the latter into superheated, low pressure steam and producing said heat depleted hot exhaust gases that are supplied to said pre-heater and produce further heat-depleted hot exhaust gases, a low pressure steam turbine expanding said superheated, low pressure steam and producing low pressure exhaust steam, and a condenser condensing said low pressure exhaust steam to steam condensate; c) a combustor-heat exchanger apparatus comprising a superheater, an economizer, a pre-heater/vaporizer and a combustor responsive to said further heat-depleted exhaust gases, and burning low priced solid fuel for supplying additional heat to a product of said heat exchanger apparatus, such that said combustor produces combustion products; d) said pre-heater/vaporizer responsive to said combustion products and warmed pre-heated steam condensate to produce high-pressure steam that is supplied to said superheater; e) said superheater responsive to said heat supplied by said combustor and to said high-pressure steam for converting the latter to superheated high pressure steam; f) a high pressure steam turbine for expanding said superheated high pressure steam and producing power and said exhaust steam; and g) said economizer responsive to said combustion products and to said steam condensate for producing said pre-heated steam condensate.