FIELD: various technological processes; chemistry.
SUBSTANCE: invention relates to gasification of fuel and can be used in particular for gasification of fuel and production of hydrogen in chemical cycles with separation of carbon dioxide from synthetic gas obtained as a result of gasification. Plant with gas generator for producing hydrogen from synthetic gas includes gas generator, the first inlet of which is connected to pipeline for fuel supply, on the line of which a drier and bin for dried fuel are installed in series. Gas generator contains a device for its heating. First outlet of the gas generator is connected to the first inlet of the circulating fluidised bed reactor by means of a branch pipe for supplying circulating particles. Circulating fluidised bed reactor comprises a device for its heating. Second inlet of the circulating fluidised bed reactor is connected to the first air supply pipeline, the inlet of which is connected to a compressor connected to an air source. At that, at least one outlet of the circulating fluidised bed reactor is connected by means of a branch pipe for removal of gases and particles with a cyclone of the circulating fluidized bed reactor, containing a branch pipe for removal of gases, on the line of which the first heat exchanger is installed and which is connected to the chimney. Cyclone of the circulating fluidised bed reactor is connected to the circulating fluidised bed reactor and the gas generator by means of branch pipes for removal of circulating particles. Cyclone of the circulating fluidised bed reactor contains a pneumatic gate preventing the ingress of gas from the lower part of the circulating fluidised bed reactor back into its cyclone. Sand bin is connected to the second inlet of the gas generator by means of a sand supply pipe. Besides, the second outlet of the gas generator is connected by means of a branch pipe for supply of gases and particles with a gas generator cyclone containing a branch pipe for withdrawal of synthetic gas, which is connected to the first inlet of the fuel reactor with a fluidised bed of iron oxides. Fuel reactor contains a device for its heating. Cyclone of the gas generator is also connected to the gas generator by means of a nozzle for removal of particles. Cyclone of the gas generator contains a pneumatic gate preventing the ingress of gas from the lower part of the gas generator back into its cyclone. Outlet of the fuel reactor with a fluidised bed of iron oxides is connected by means of the first tube for removal of gases and particles with the inlet of the cyclone of the fuel reactor, having a tube for removal of gases, on the line of which the second and third heat exchangers are installed in series. Cyclone of the fuel reactor contains a pneumatic gate preventing the ingress of gas from the lower part of the fuel reactor back into its cyclone. At that, the fuel reactor cyclone is connected by means of the first particle removal pipe to the steam reactor first inlet, the outlet of the latter is connected by means of the second tube for removal of gases and particles with a steam reactor cyclone containing a tube for removal of gases, on the line of which the fourth and fifth heat exchangers are installed. Cyclone of the steam reactor contains a pneumatic gate preventing the ingress of gas from the lower part of the steam reactor back into its cyclone. Wherein the steam reactor cyclone is connected by means of the second particle discharge tube to the first inlet of the air reactor, outlet of which is connected by means of third tube for removal of gases and particles with inlet of cyclone of air reactor, containing tube for removal of gases, on the line of which the sixth and seventh heat exchangers are installed in series. Cyclone of the air reactor contains a pneumatic gate preventing the ingress of gas from the lower part of the air reactor back into its cyclone. Cyclone of the air reactor is connected to the second inlet of the fuel reactor by means of the third tube for removal of particles. Compressor is connected by means of the second air supply pipeline, on the line of which the sixth heat exchanger is installed, to the second inlet of the air reactor. First steam turbine bleed pipeline is connected to the second inlet of the gas generator and to the second inlet of the steam reactor. Besides, the second steam turbine extraction pipeline, on the line of which there is a drier, is connected to the steam turbine outlet pipeline, on the line of which there are installed a condenser, the third, the fifth and the eighth heat exchangers, and which is connected to the steam generator. Pipeline on the line of which the first, second and fourth heat exchangers are installed is connected to a steam line connected to the inlet of the steam turbine. At the same time on the line of the feed water supply pipe passing through the air reactor the seventh heat exchanger is installed and it is connected to the steam line. Seventh heat exchanger is connected to the condensate discharge tube, on the line of which the eighth heat exchanger is installed. At that, the first pipe of external steam supply is connected to the first steam turbine extraction pipeline, and the second external steam supply pipe is connected to the second steam turbine extraction pipeline.
EFFECT: enabling the afterburning of the coke residue obtained as a result of the solid fuel gasification; enabling recycling of ash particles in a mixture with sand between the gas generator and the circulating fluidised bed reactor; providing the possibility of obtaining hydrogen in chemical cycles with separation of carbon dioxide from synthetic gas obtained as a result of gasification of solid fuel; providing heat utilization of gases leaving the circulating fluidised bed reactor, as well as providing the possibility of utilizing heat of gases leaving the fuel, steam and air reactors.
1 cl, 4 dwg
