Patent ID: 6343570
Filing Date: 2002-02-05
Classification: F01K,Y02E

Abstract:
A steam generator, comprising:an elongate gas flue having an inflow end for hot gas and an outflow end for cooled hot gas, defining a throughflow direction of the hot gas; a first evaporator heating surface disposed in said gas flue and having an inlet side; a first feed water supply line throughflow-connected to said first evaporator heating surface on said inlet side, said first supply line having a first treatment point for at least one of adding and extracting chemicals for water treatment, and said first supply line having a preheater heating surface disposed within said gas flue and defining a connection point between said preheater heating surface and said first evaporator heating surface; a second evaporator heating surface disposed in said gas flue downstream of said first evaporator heating surface as seen in said throughflow direction of the hot gas, said second evaporator heating surface having inlet and outlet sides; a low-pressure drum throughflow-connected to said second evaporator heating surface on both said inlet and outlet sides; and a second feed water supply line connected to said low-pressure drum, said second feed water supply line having a second treatment point for at least one of adding and extracting chemicals for water treatment, and said second treatment point has a deaeration vessel for extracting a gaseous chemical from feed water and said second supply line throughflow-connected to said first supply line at said connection point.