FIELD: power engineering.
SUBSTANCE: invention relates to nuclear power engineering and is intended for use at steam turbine plants of nuclear power plants (NPP) at working medium temperature below hydrogen self-ignition temperature in mixture with oxygen. Hydrogen combustion system for hydrogen vapor overheating of fresh steam in a cycle of a nuclear power plant includes a hydrogen-oxygen steam generator with an ignition device, supply lines for oxidizing agent (oxygen) and fuel (hydrogen), hydrogen-oxygen combustion chamber of initial non-stoichiometric oxidation with swirling blade device, afterburning hydrogen-oxygen combustion chamber of stoichiometric oxidation, mixing cavity of high-temperature steam with fresh steam in area before high pressure cylinder of steam turbine, wherein afterburning hydrogen-oxygen combustion chamber of stoichiometric oxidation is made in form of diffuser arranged in mixing cavity of high-temperature steam with fresh steam, and walls of hydrogen-oxygen combustion chambers are made of ultrahigh-temperature ceramic material, providing operation of combustion system in conditions of steam cooling. Initially, hydrogen is burnt in oxygen in a non-stoichiometric ratio in a hydrogen-oxygen combustion chamber of non-stoichiometric oxidation with no use of forced cooling of the balloon component, followed by swirling of formed mixture of water vapor with excess portion of oxygen. Combustion of hydrogen in oxygen in afterburning hydrogen-oxygen combustion chamber of stoichiometric oxidation is carried out in conditions of swirled flow due to self-ignition with formation of high-temperature steam and its subsequent mixing with fresh steam of turbine.
EFFECT: providing the most complete combustion of hydrogen in the oxygen medium due to swirled flow of components in the absence of overheating and plastic deformation of the walls of the afterburning hydrogen-oxygen combustion chamber of stoichiometric oxidation under conditions of steam cooling.
1 cl, 1 dwg
