High-temperature tail gas combustion assisting combustion device of gas turbine

Abstract

The invention discloses a high-temperature tail gas combustion assisting combustion device of a gas turbine. The device comprises a shell, a center gas pipe, a center air pipe, a main gas pipe, a center gas combustor, a main gas combustor, a high-temperature smoke flow separation mechanism, an air pipe with an electric air door, and a flame detector; a maintenance door is provided on the front side of the shell; a waste gas connecting pipe is provided on the left side of the shell; the air pipe with the electric air door is mounted at the back side end of the shell; the high-temperature smokeflow separation mechanism is provided at the right side end of the shell; an observation pipe is additionally provided at the left side end of the shell; the center gas pipe, the center air pipe and the main gas pipe are respectively mounted at the lower end of the shell; the center gas combustor is transversely mounted at the middle in the shell; and the main gas combustor is transversely mountedin the middle of the shell, and is concentric with the high-temperature smoke flow separation mechanism after installation. The device can effectively utilize waste gas discharged by the gas turbine,reduces the smoke oxygen content and nitric oxide NOx, and reduces the environment pollution under the precondition that all of heat and oxygen in the tail gas of the gas turbine are utilized.

Description

technical field [0001] The invention relates to the field of gas turbine high-temperature tail gas combustion-supporting burner equipment, in particular to a gas turbine high-temperature tail gas combustion-supporting combustion device. Background technique [0002] When a gas turbine uses natural gas to generate electricity, it will emit high-temperature exhaust gas with a temperature of about 400-500°C. At the same time, because the combustion power generation efficiency of the gas turbine is not high, 15% of the oxygen contained in the combustion exhaust gas is not fully utilized. In order to achieve effective utilization of energy, usually, this part of high-temperature flue gas is directly passed to the waste heat boiler for waste heat utilization. However, when the power of the gas turbine is small, the flow rate of high-temperature exhaust gas is also very limited. The waste heat is also relatively small, and the power of the waste heat boiler that can be driven is ve...

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Problems solved by technology

[0004] In order to overcome the existing waste heat utilization of gas turbines, due to the lack of combustion-supporting combustion for the exhaust gas after combustion, the heat energy and oxygen content in the high-temperature exhaust gas discharged by the gas turbine are not fully utilized, and the exhaust gas contains a large amount of nitrogen oxides NOx, which will The disadvantages of polluting the environment, the present invention not only can effectively utilize the waste gas discharged from the gas turbine, but also burn natural gas alone to provide heat for the waste heat boiler when the gas turbine stops working, ensuring the normal operation of the boiler, and working together in the relevant mechanisms Under the premise of reducing the exhaust temperature of the final flue gas, reducing the oxygen content and nitrogen oxides NOx in the flue gas, the heat and oxygen of the exhaust gas of the gas turbine can be fully utilized as much as possible, and the high-temperature exhaust combustion of the gas turbine that reduces environmental pollution Burner device

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