Burner devices

Currently, gas turbines are subject to stringent requirements on environmental emission limits for nitrogen oxides NOx and carbon oxides CO.

The main way that designers have followed is to organize the combustion process at lower temperatures. It is the designs of burners with pilot and premix channels that make it possible to realize this process. Such burners are called combined burners.

A combined fuel burner for a gas turbine engine includes a pilot fuel gas channel, a homogeneous fuel gas channel, a pre-mixing annular channel, and an air channel. The central air channel has a swirler for better mixing and intensification of the combustion process. Some modifications of burner devices also have a channel for water or steam injection. In such devices, water is injected into the fuel and air flow through the ducts and the annular air channel. Such solutions allow to further reduce the combustion temperature and control harmful emissions of nitrogen oxides NOx and carbon oxides CO.

In addition to operation with natural gas, the burner units have the option of burning liquid fuels. The design of the swirler and liquid fuel nozzles allows burning liquid fuel without increased emissions of carbon monoxide CO. It is also possible to burn lower calorie fuels.