Process and installation for controlling the quantity of solid particles emitted by a combustion turbine

Abstract

The invention concerns a method of controlling the quantity of solid particles emitted by a combustion turbine ( 1 ), during the combustion of a liquid fuel, by injecting a combustion catalyst suitable for reducing the quantity of solid particles generated during combustion. This method comprises the following steps: Measuring the quantity of particles (Qsuies) emitted during combustion; Injecting the combustion catalyst into the combustion turbine ( 1 ) when the quantity of particles measured is higher than a maximum threshold value; and Stopping the injection of the catalyst when the measured quantity of particles is lower than a minimum target value.

1 . A method of controlling the quantity of solid particles emitted by a combustion turbine ( 1 ), during the combustion of a liquid fuel, by injecting a combustion catalyst suitable for reducing the quantity of solid particles generated during combustion, characterized in, that it comprises the following steps:
 Measuring the quantity of particles (Qsuies) emitted during combustion;   Injecting the combustion catalyst into the combustion turbine when the concentration of particles measured is higher than a maximum threshold value; and   Stopping the injection of the catalyst when the measured quantity of particles is lower than a minimum target value.   
     
     
         2 . The method according to the  claim 1 , in which the temperature of the flame of the combustion turbine is more than or equal to 1363K. 
     
     
         3 . The method according to one of the  claims 1  and  2 , in which the catalyst is injected into a feed line ( 8 ) of the said liquid fuel system, upstream of the combustion system of the combustion turbine. 
     
     
         4 . The method according to one of the  claims 1  and  2 , in which the catalyst is injected into the combustion chambers ( 3 ) of a combustion system of the combustion turbine. 
     
     
         5 . The method according to one of the  claims 1  to  4 , in which the maximum threshold value is a particle concentration range between 45 mg/Nm 3  and 55 mg/Nm 3 . 
     
     
         6 . The method according to one of the  claims 1  to  5 , in which the minimum target value is a particle concentration range between 20 mg/Nm 3  and 30 mg/Nm 3 . 
     
     
         7 . The method according to one of the  claims 1  to  6 , in which the combustion catalyst includes at least an element selected from iron (III) oxides, cerium (III) oxides, cerium (IV) oxides and their mixtures. 
     
     
         8 . The method according to one of the  claims 1  to  7 , in which the concentration of particles emitted is measured continuously. 
     
     
         9 . A system for controlling the quantity of solid particles emitted by a combustion turbine ( 1 ), during the combustion of a solid fuel, comprising combustion catalyst injection means ( 10 ) suitable for reducing the quantity of particles generated during the combustion, characterized in, that it comprises measurement means ( 12 ) for measuring the quantity of emitted particles and a central control unit ( 11 ) suitable for activating the measurement means so as to inject the combustion catalyst into the combustion turbine ( 1 ) when the measured quantity of particles is higher than a maximum threshold value and to stop the injection of the catalyst when the measured quantity of particles is lower than a minimum target value. 
     
     
         10 . The installation of turbine gas type, characterized in, that it comprises a system of control according to  claim 9 .