Gas and steam turbine system

Abstract

A gas and steam turbine system includes a gas turbine, a steam turbine (7), a super heater (4), a waste heat boiler (5) and a drum (6). The gas turbine includes a compressor (1), a combustion chamber (2) and a turbine (3). The super heater (4) and the waste heat boiler (5) are orderly arranged in flue gas discharge pipe of the turbine (3). The super heater (4) communicates with the drum (6) to receive the saturated steam from the drum (6) and communicates with the steam turbine (7) to supply superheated steam to the steam turbine (7). The waste heat boiler (5) communicates with the drum (6) to form a circulation loop. Steam nozzles (15) arranged in the combustion chamber (2) communicate with the drum (6) to convey the saturated steam in the drum (6) into the combustion chamber (2). The input amount of air from the compressor (1) into the combustion chamber (2) is reduced by conveying the saturated steam in the drum (6) into the combustion chamber (2) so as to save energy.

Description

technical field [0001] The invention relates to energy power technology, in particular to a gas and steam turbine system. Background technique [0002] The gas turbine is an internal combustion power machine that uses continuous flowing gas as the working medium to drive the turbine to rotate at high speed, and converts the chemical energy of the fuel into kinetic energy. It is a rotary impeller heat engine. [0003] Generally, a gas turbine includes a compressor, a combustor, a combustion chamber, and a turbine. The compressor compresses air into high-pressure gas, and the high-pressure gas is mixed with fuel in the combustor to form an oil-gas mixture, which is ignited by the ignition device and then burned. The high temperature generated by fuel combustion The high-pressure gas drives the turbine to rotate, and the turbine rotates to drive the generator set to generate electricity. [0004] During the working process of the gas turbine, the fuel combustion in the combust...

AI Technical Summary

Problems solved by technology

[0006] It can be seen that in the prior art, 60%-75% of the high-pressure gas pumped out by the compressor cools the combustion chamber and reduces the temperature of the flue gas in the combustion chamber, thus requiring a large amount of energy for cooling the combustion chamber and reducing the temperature of the combustion chamber. temperature of the flue gas, wasting energy

[0007] In addition, due to the small specific heat of air, the cooling effect of cooling the combustion chamber by air cooling is poor, and it is easy to cause damage to the combustion chamber

[0008] In addition, the heat in the flue gas discharged from the turbine is not fully utilized, and most of the flue gas is discharged into the air, resulting in waste of energy and environmental pollution

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