Plasma ignition and combustion supporting device used for gas fuel with low heating value

Abstract

The invention aims to provide a plasma ignition and combustion supporting device used for gas fuel with a low heating value. The plasma ignition and combustion supporting device used for the gas fuelwith the low heating value comprises a fixing flange, a straight pipe, a connector, a plasma generator and a device head. The fixing flange, the straight pipe, the connector, the plasma generator andthe device head are tightly connected through inner threads and outer threads. The fixing flange is provided with a gas nozzle; if air is introduced into the gas nozzle, the outlet jet flow length andtemperature of the plasma generator are controlled through air flow, and ignition is finished; if the gas with the low heating value is introduced into the gas nozzle, the device not only is used forignition, but also is used for stabilizing burning of the gas with the low heating value; and the device head does not corrode the outer wall of the device when the plasma generator discharges and isused for protecting the plasma generator. The gas fuel with the low heating value can be ignited successively, ignition is stable, the effect of supporting combustion of the gas fuel with the low heating value is achieved, and reliability is high.

Description

technical field [0001] The invention relates to an ignition and combustion-supporting device, in particular to a gas turbine ignition and combustion-supporting device. Background technique [0002] Low calorific value gas fuel means that the heat released by the complete combustion of 1Nm3 gas is less than 6.28MJ. For gas turbines burning high calorific value gas fuel, when switching to low calorific value gas fuel, the gas fuel with lower calorific value will cause the ignition of the fuel to change. Difficult to obtain; the low calorific value gaseous fuel H content rarely makes the combustion of the fuel difficult, and the commonly used igniter cannot meet the requirements of use, the ignition is unstable and unreliable, and the combustion is unstable and difficult. Contents of the invention [0003] The object of the present invention is to provide a plasma ignition and combustion-supporting device for low calorific value gas fuels that can successfully ignite low calo...

AI Technical Summary

Problems solved by technology

[0002] Low calorific value gas fuel means that the heat released by the complete combustion of 1Nm3 gas is less than 6.28MJ. For gas turbines burning high calorific value gas fuel, when switching to low calorific value gas fuel, the gas fuel with lower calorific value will cause the ignition of the fuel to change. It is difficult to obtain; the content of low calorific value gas fuel H is very small, which will make the combustion of the fuel difficult, and the commonly used igniter cannot meet the requirements of use, the ignition is unstable and unreliable, and the combustion is unstable and difficult.

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