HYBRID PLANT FOR GENERATION OF ENERGY FROM HYDROCARBON-HYDROGEN GAS MIXTURES Russian patent published in 2025 - IPC F01K21/00 H01M8/662 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: present invention relates to the power industry, specifically to devices for generating heat and electric power from hydrocarbon gases, which include a solid oxide fuel cell (SOFC), a fuel treatment system, as well as a gas-steam turbine. Hybrid unit for generating energy from hydrocarbon-hydrogen gas mixtures, comprising: a hydrogenation reactor for preliminary purification of the initial gas mixture from sulphur, where hydrogen is supplied at pressure of 20 bar for the hydrogenation reaction, as well as where temperature is maintained 400 °C due to external heating by a stream of high-potential anode gases, wherein all sulphur compounds are converted to hydrogen sulphide, an adsorption unit, where after the hydrogenation reactor the hydrocarbon gas mixture with hydrogen sulphide formed as a result of the hydrogenation reaction is supplied for its collection by chemical adsorption, a flow divider through which the purified hydrocarbon mixture passes, where one part of the initial stream is directed to the streams mixer, and the other part of the initial stream is directed to the burner device required to start the hybrid plant and bring it to the set operating mode, at which the heat transferred by the high-potential gases is sufficient to maintain the optimum temperature for the steam reforming reactions, the air heater, where the exhaust gases are sent to release the residual heat to the air, directed to the burner device and to the solid oxide fuel cell (SOFC) cathode chamber, and then to the steam generator to provide its external heating for further steam generation of water, after which the low-potential gases are mixed with the initial fuel, separately supplied for supply to the gas-steam turbine, combustion chamber, where the resulting mixture of the initial fuel and exhaust gases is directed, a gas-steam turbine, where the flue gases are expanded, generating electricity, and then directed to the recuperator, where the air supplied to the combustion chamber is heated, wherein after the recuperator, the exhaust gases enter the exhaust-heat boiler for transfer to the heat carrier and then discharged into atmosphere, heat exchanger, where by flow of recirculating anode gases with high content of carbon dioxide and carbon monoxide separated stream of initial fuel is mixed with superheated steam and heated, an ejector through which anode gases with a large content of unreacted hydrogen and hydrocarbons are added to the mixture and enter the steam reforming reactor, SOFC anode chamber, where synthesis gas obtained as a result of steam conversion is supplied, wherein a nickel-catalysed solid oxide fuel cell is used in which, as a result of electrochemical reactions, electric and thermal energy is generated, and the obtained anode gases are directed to a flow divider and divided into streams, a compressor, where atmospheric air is supplied, then part of flow is directed to burner device, part is to air heater, wherein the heated air enters the fuel cell cathode chamber, and the oxygen-depleted exhaust air is directed to the burner device used to start the hybrid plant, water treatment plant, where tap water enters, steam generator, where obtained chemically treated water is directed.

EFFECT: invention allows increasing plant efficiency due to improving fuel gases and heat use efficiency, as well as improving operating reliability of the plant due to optimizing the design and operating modes of SOFC.

1 cl, 2 dwg