Burner assembly for a steam production boiler assembly and method for operating said burner assembly

A bummer assembly for a boiler for the production of steam;

• the burner assembly extends along a longitudinal axis and comprises:
• an air duct centered along the longitudinal axis, in which, in use, air flows in a forward direction;
• the air duct being provided with an outlet discharging into a combustion chamber of the boiler unit;
• a plurality of fuel conduits into which, in use, at least one fuel flows in the forward direction;
• a plurality of fuel injection nozzles, arranged around the air duct;
• each fuel injection nozzle being connected to an end portion of a respective fuel duct for discharging, in use, the fuel into the combustion chamber;
• the outlet of the air duct being arranged downstream of the fuel injection nozzles along the forward direction;
• the end portion of at least one fuel conduit being rotatable about its own extension axis;
• wherein each fuel injection nozzle is provided with at least one injection hole, which is offset with respect to the extension axis of the end portion of the fuel conduit to which the fuel injection nozzle is connected.

A burner assembly for a boiler unit for steam generation;

• the burner assembly extends along a longitudinal axis and comprises:
• a plurality of fuel conduits into which, in use, at least one fuel flows in a forward direction;
• a plurality of fuel injection nozzles, connected to respective fuel conduits for discharging, in use, the fuel into a combustion chamber of the boiler unit;
• a first manifold connected to a first group of the fuel conduits and to a first fuel source by means of a first supply line provided with a first regulating valve;
• at least a second manifold connected to a second group of the fuel conduits and to a source of a second fuel by means of a second supply line provided with a second regulating valve;
• a control device configured to regulate the first regulating valve and the second regulating valve based on an energy demand of the boiler unit and based on at least one characteristic parameter of the first fuel and/or the second fuel;
• and
• at least one first connection line, which connects the first manifold to the at least one second manifold and is provided with a first connection valve;
• the control device being configured to regulate the first connection valve on the basis of a first data of the first fuel detected on the first supply line downstream of the first regulating valve and/or on the basis of a second data of the second fuel detected on the second supply line downstream of the second regulating valve.

A burner assembly for a boiler for the production of steam;

• the burner assembly extends along a longitudinal axis and comprises:
• an air duct centered along the axis, in which, in use, air flows in a forward direction;
• the air duct being provided with an outlet discharging into a combustion chamber of the boiler unit;
• a plurality of fuel conduits into which, in use, at least one fuel flows in the forward direction;
• a plurality of fuel injection nozzles, arranged around the air duct;
• each fuel injection nozzle being connected to an end portion of a respective fuel duct for discharging, in use, the fuel into the combustion chamber;
• the outlet of the air duct being arranged downstream of the fuel injection nozzles along the forward direction;
• the end portion of at least one fuel conduit being rotatable about its own extension axis;
• wherein the air duct comprises an annular outlet element made of refractory material and provided with an outlet edge defining the outlet of the air duct;
• the outlet element being provided with a plurality of through seats, in which the respective end portions of the fuel ducts are housed.