FIELD: power industry.
SUBSTANCE: method for controlling the process of power production at the power station with a furnace burning carbon-containing fuel with virtually pure oxygen, working at maximum capacity, includes:
(a1) feeding the first supply stream of carbon-containing fuel into the furnace;
(b1) feeding the first supply stream of virtually pure oxygen into the furnace to burn the first supply stream of carbon-containing fuel;
(c1) extracting the burnt gas from the furnace via the burnt gas exhaust;
(d1) heat removal from the burnt gas via heat-exchange surfaces in the burnt gas exhaust;
(e1) recycling a portion of the burnt gas through the burnt gas recycling channel connected with the burnt gas exhaust downstream of the heat-exchanging surfaces at the first rate of the recycling stream's feeding into the furnace, in order to form with the first supply stream of virtually pure oxygen the first gas input stream;
and, in the second load mode, corresponding to up to 90% of maximum capacity, includes:
(a2) feeding the second supply stream of carbon-containing fuel into the furnace;
(b2) feeding the second supply stream of virtually pure oxygen into the furnace to burn the second supply stream of carbon-containing fuel;
(c2) extracting the burnt gas from the furnace via the burnt gas exhaust;
(d2) heat removal from the burnt gas via heat-exchange surfaces in the burnt gas exhaust;
(e2) recycling a portion of the burnt gas through the burnt gas recycling channel connected with the burnt gas exhaust downstream of the heat-exchanging surfaces at the second rate of the recycling stream's feeding into the furnace, in order to form with the second supply stream of virtually pure oxygen the second gas input stream; furthermore, the burnt gas extraction must be performed at the second rate, and the second rate of gas recycling stream must differ from the first rate of gas recycling rate by the value necessary to keep the second extraction rate roughly equal to the first recycling rate to keep the heat distribution on the heat-exchange surfaces.
EFFECT: provided the possibility to control power production in different load conditions.
10 cl, 1 dwg
