Low-pollution combustor for various fuels

Abstract

The invention discloses a low-pollution combustor for various fuels, which comprises a shunt system, a mounting edge and a plurality of double fuel nozzles, wherein the shunt system is connected with the plurality of double fuel nozzles through the mounting edge into a whole; the shunt system comprises a gas fuel subchannel, a liquid fuel subchannel, a diluent subchannel and an atomized air subchannel; and the double fuel nozzles are arranged circumferentially along the central line of the combustor. The low-pollution combustor for various fuels provided by the invention reduces the dischargeof pollutants such as NOX, solves the problems such as backfire and unstable combustion of premixing combustion of synthetic gases, simplifies an air cleaning and blowing protective system of a combustion chamber, avoids increasing the discharge of carbon monoxide, and can work with low and medium thermal value gas fuel such as coke oven gas, chemical tail gases and synthetic tail gases from IGCCpower plants and high thermal value gas fuel such as diesel oil and natural gas.

Description

technical field [0001] The invention relates to the technical field of gas turbine combustors, in particular to the field of gas turbine combustors applying medium and low calorific value gas fuels. Background technique [0002] Traditionally, gas turbines work with high calorific value natural gas and liquid fuels (mainly diesel, etc.). In recent years, my country's energy supply and environmental pressure have been increasing day by day, the supply of natural gas and oil has been tight, and the price has risen severely. The operating cost of gas turbines using natural gas and oil has become increasingly unbearable. my country's energy structure is dominated by coal, but the traditional coal-fired power generation process produces a large amount of pollutants, which is an important source of environmental pollution. Integrated Gasification Combined Cycle (IGCC) generates low-to-medium calorific value synthesis gas by gasifying coal. After the synthesis gas is purified, it ...

AI Technical Summary

Problems solved by technology

If you continue to use the original lean oil premixed combustion method, you will face a great risk of flashback. The flashback of the flame in the combustion chamber will cause overheating and ablation of the burner, which will seriously endanger the operation safety of the entire gas turbine

If the diffusion combustion method is used, although the tempering problem can be avoided, due to the high flame temperature, nitrogen oxides (NO X ) The problem of a large increase in emissions

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