DIRECT-FLOW STEAM BOILER ON SOLID FUEL WITH INVERTED COMBUSTION CHAMBER FOR STEAM-TURBINE POWER UNIT OF ULTRA-SUPERCRITICAL STEAM PARAMETERS Russian patent published in 2016 - IPC F22B29/06 F22D1/38 F22G7/12 

FIELD: energy.

SUBSTANCE: field of use: heat power industry. Direct-flow steam boiler on solid fuel for steam-turbine power unit of ultra-supercritical steam parameters contains invert furnace chamber 10, screened with airtight steam-generating tube panels, top and bottom radiation parts, lifting and lowering convection gas ducts 70 and 90, horizontal connecting gas duct 60 between furnace chamber 10 and lifting convective gas duct 70, rotary chamber 80 between said lifting and lowering convective gas ducts 70 and 90 in their upper part. Output collectors of pipe panels of first pass of lower radiation part of shielding of furnace chamber 10 are connected by bypass pipes with inlet collectors of corresponding pipe panels of second pass to provide descending movement of working medium, under horizontal connecting gas duct 60 there is a separate screening ash removal funnel 63.

EFFECT: invention shall ensure reduced thermal strains in steam generating pipe panels of second pass of lower radiation part; elimination of hydrodynamic instability of working medium in pre-launch modes of boiler, preventing drift of ash of horizontal connection gas duct, providing minimum length of hot steam lines.

1 cl, 5 dwg