GAS PUMPING UNIT Russian patent published in 2022 - IPC F02C3/00 

FIELD: gas industry

SUBSTANCE: invention relates to gas pumping units. Gas pumping unit containing a gas turbine engine, an inlet apparatus, an annular combustion chamber with nozzles on a nozzle plate, a flue tube with an external flue tube casing, a fuel line connected with the nozzles via a fuel collector and connected with the outlet gas pipe, a free turbine, and an exhaust apparatus. Herewith, the gas pumping unit according to the invention comprises a second gas line, a second fuel collector connected via the preheating heat exchanger installed in the exhaust apparatus and the final heating heat exchanger installed in the flue tube on part of the external wall of the flue tube adjacent to the nozzle plate, wherein the final heating heat exchanger is provided with through holes with side walls of the holes ensuring the communication of the external annular gap between the external casing of the flue tube and the external body of the chamber with the cavity of the flue tube.

EFFECT: higher performance coefficient of the unit and heat resistance of the final heating heat exchanger and reduced circumferential distortion of the temperature field at the outlet of the combustion chamber.

9 cl, 13 dwg