Ignition-supplementing combustion chamber and gas turbine system

Abstract

The invention relates to the technical field of gas turbines, and discloses an ignition-supplementing combustion chamber and a gas turbine system. The ignition-supplementing combustion chamber comprises a combustion chamber shell, a flame barrel, a fuel nozzle and an igniter, wherein the combustion chamber shell is arranged in an exhaust flue behind a gas turbine, the flame barrel is located in the combustion chamber shell and comprises a main combustion region and an intermediate region which are sequentially arranged from the front end to the rear end, the fuel nozzle is arranged at the front end of the flame barrel, and the igniter is arranged on the position, opposite to the main combustion region, of the side wall of the flame barrel. The ignition-supplementing combustion chamber is arranged in the exhaust flue of the gas turbine, so that the exhaust temperature of the gas turbine system can be remarkably improved under various working conditions, the thermoelectric ratio can be effectively improved, and the theoretical adjusting range can reach 100%; and therefore, the thermoelectric ratio adjusting range of a hot and cold electric distribution type energy system based on thegas turbine can be optimized.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to an afterburning combustion chamber and a gas turbine system. Background technique [0002] The cooling, heating and power distributed energy system based on micro-small gas turbines is booming. At present, there is a large gap between peak and valley electricity prices and different power demands. However, adjusting the power output by using gas turbines to operate in some working conditions or even shutting down in valleys will lead to a decrease in heat output. As a result, great changes have taken place. Therefore, it is generally required that the electric-heat ratio of distributed energy systems be adjustable. The current adjustment technical means mainly include waste heat boilers with supplementary combustion or bromine coolers, and technologies such as adjustable regenerator ratios. However, the above-mentioned The adjustment range is very limited. For example, if eq...

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Problems solved by technology

[0002] The cooling, heating and power distributed energy system based on micro-small gas turbines is booming. At present, there is a large gap between peak and valley electricity prices and different power demands. However, adjusting the power output by using gas turbines to operate in some working conditions or even shutting down in valleys will lead to a decrease in heat output. As a result, great changes have taken place. Therefore, it is generally required that the electric-heat ratio of distributed energy systems be adjustable. The current adjustment technical means mainly include waste heat boilers with supplementary combustion or bromine coolers, and technologies such as adjustable regenerator ratios. However, the above-mentioned The adjustment range is very limited. For example, if it is equipped with a waste heat boiler or a bromine cooler with supplementary combustion, the adjustment range of the thermoelectric ratio is only about 40%, and it will cause the maximum flue gas temperature to drop.

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