FIELD: power industry.
SUBSTANCE: combination gas-turbine plant includes gas-turbine unit including compressor, combustion chamber and turbine, absorption refrigerating machine with circulating cooling agent and with heat-absorbing elements connected to steam turbine outlet. Steam circuit with HRSG the outlet of which is connected as to steam to steam turbine is connected to turbine outlet. Combination gas-turbine plant is equipped with conversion unit of low-pressure natural or accompanying oil gas to synthesis gas, fuel synthesis unit and hydrocracking module. Fuel feed system is connected to source of supply of low-pressure natural or accompanying oil gas, which is connected to compressor unit, and is equipped with in-series located desulfurisation unit of low-pressure natural or accompanying oil gas, unit for its separation and drying with condensate collecting module and fuel compression module connected to combustion chamber of gas-turbine unit. Steam turbine is provided with water treatment unit. Circulating cooling agent of absorption refrigerating machine is connected to fuel synthesis unit for cooling of synthesis gas and condensation of synthetic fuels. HRSG is connected as to steam to conversion unit of low-pressure natural or accompanying oil gas for steam conversion of hydrocarbons in synthesis gas. Gas turbine outlet is connected to conversion unit and to fuel synthesis unit. Condensate collecting module is connected to fuel synthesis unit and to HRSG. Separation and drying unit is connected to fuel synthesis unit. Conversion unit is connected to fuel synthesis unit, and desulphurisation unit is connected to HRSG.
EFFECT: increasing efficiency of combination gas-turbine plant with flexible application scheme of low-pressure natural gas, accompanying oil gases of various composition for generation of electric power, obtaining synthetic fuel and utilisation of residual heat.
15 cl, 1 dwg
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