GAS TURBINE WITH FUEL COMPOSITION CONTROL

摘要

A plant with a fuel system includes a gas separation system for separating at least a first fuel fraction with high hydrocarbons, which has a higher concentration of high hydrocarbons than an incoming fuel gas. A second fuel fraction with a reduced concentration of high hydrocarbons is provided. A fuel gas supply line for incoming fuel and/or a fuel line for the second fuel fraction leads to the combustor of the gas turbine for feeding fuel gas into the combustor. Further a fuel line for feeding the first fuel fraction leads to the at least one combustor to control the combustion behaviour by controlled addition of the first fuel fraction into the combustor. The disclosure further refers to the operation of such a plant by controlling the combustion behaviour with the controlled addition of a high hydrocarbon fuel.

主权项

1. A gas turbine with at least a compressor, a combustor, a turbine, and a fuel system,
wherein fuel system comprises a gas separation system, for separating at least a first fuel fraction with high hydrocarbons, which has a higher concentration of high hydrocarbons than an incoming fuel gas, thereby providing a remaining second fuel fraction with a reduced concentration of high hydrocarbons, which has a lower concentration of high hydrocarbons than the incoming fuel gas, and a fuel gas supply line for incoming fuel and/or a fuel line for the second fuel fraction leads to the combustor of the gas turbine for feeding fuel gas into the combustor and in that a fuel line for feeding the first fuel fraction leads to the combustor to control the combustion behaviour by controlled addition of the first fuel fraction into the combustor.