Method of optimizing the limitation of dust emissions for gas turbines fueled with heavy fuel oil.

A method for optimizing the limitation of the dust emissions of a gas turbine or combustion plant comprising:

• a liquid fuel oil supply line connecting a fuel source to at least one combustion chamber, comprising means for controlling the temperature of the fuel oil, and means for storing and controlling the injection of a soot inhibitor,
• a line for generating the fuel oil atomizing air, connecting a main compressor to at least one combustion chamber, comprising means for controlling the temperature, flow rate and pressure of the fuel oil atomizing air,
• a central controller receiving information on the fuel oil temperature, fuel oil viscosity, air pressure of the fuel oil atomization, and combustion gas exhaust dust concentration, and controlling a device for controlling the temperature of the fuel oil, a valve for controlling the atomizing air flow of the fuel oil, and a device for controlling the injection of a soot inhibitor,
• the method comprising:
• a first step, from a nominal temperature of the fuel oil and a nominal pressure ratio of the atomizing air of the fuel oil, and by controlling the injection of a soot inhibitor, defining a nominal operating point corresponding to the maximum permissible level of emitted dust;
• a second step of controlling a first parameter, taken from the group of the fuel oil temperature and the ratio of the pressure of the fuel oil atomizing air, in order to reach another operating point;
• and
• a third step of controlling the injection of a soot inhibitor to reach the maximum permissible level of emitted dust.