GAS TURBINE PLANT OF RAISED EFFICIENCY Russian patent published in 2015 - IPC F02C3/30 

FIELD: machine building.

SUBSTANCE: gas turbine plant of raised efficiency comprises a coal gasifier, a gasification product cleaning system, regenerative heat exchangers, a combustion chamber, a gas turbine, an air multistage turbocompressor with mixing chambers. The mixing chambers are installed between the stages and are made as annular cylindrical cavities located in the gas path of the multistage compressor symmetrically to its axis. The mixing chambers are of greater size in radial direction as compared to the size of the casing of the adjacent compressor stage. Every mixing chamber is equipped by the units for liquid injection, separation and withdrawal of the unevaporated part. The combustion chamber can use liquid or gaseous fuel, for this purpose the output of the multistage compressor is connected to the input of the combustion chamber through the recuperative heat exchanger at the gas turbine output through a shutoff valve. Antifreezing agent is used as cooling liquid. The turbocompressor is equipped by the units to inject the antifreezing agent to the mixing chambers in the form of large drops with the size of 20-500 mcm and to fully remove them afterwards without evaporating contact heating. The units for antifreezing agent injection and removal are united in a closed hydraulic loop including the mixing chambers with valves for antifreezing agent input and output, a circulating pump, a heat exchanger of contact type to cool the heated antifreezing agent by the ambient air with the help of fans down to the temperature exceeding the ambient air temperature by 1-8°C, a system to monitor the level and concentration of antifreezing agent solution in the heat exchanger and mixing chambers, pipelines to feed the heat exchanger with water and antifreezing agent, z drain line from the heat exchanger to a reserve tank, a line to supply antifreezing agent from the reserve tank to the hydraulic loop and shutoff valves.

EFFECT: invention is aimed at the increase of efficiency and productivity of gas turbine plants using coal, liquid or gaseous fuel.

3 cl, 1 dwg