SUPERCHARGED STEAM GENERATOR FITTED WITH HEATED WALL SURFACE AND METHOD OF ITS OPERATION Russian patent published in 2015 - IPC F22B29/06 

FIELD: power industry.

SUBSTANCE: invention relates to power engineering and can be used in supercharged steam generators. A steam generator has a combustion chamber with a burner device. Fuel and mix consisting of pure oxygen and combustion gas are supplied into the combustion chamber. The flue is joined with the combustion chamber in the direction of the combustion gas flow. The combustion gas for the mix of oxygen and combustion gas is supplied back from the combustion gas channel through a recirculation combustion gas line. A supercharged steam generator is operated in a so-called oxyfuel process. A set of auxiliary heating surfaces is located in the flue downstream the burner device. Between the burner device (20) and auxiliary heating surfaces there are made heated wall surfaces which, at least partially, enclose the combustion chamber walls. The heated wall surfaces are rested against a respectively connected segment of the wall section of the combustion chamber. The working medium flows through the heated wall surfaces and, thus, thermal energy dissipates from the combustion gas and limits heating of the working medium in pipes of the combustion chamber wall and, in this regard, limits the temperature of the wall pipes in the top section of the boiler.

EFFECT: design improvement.

14 cl, 4 dwg