Abstract: Provided is a tubular supply device for supplying gases to a combustion chamber in a heat-generating plant. The supply device includes a tube in the form of a straight lance and having an outer lateral wall for extending into the combustion chamber from a side wall. The supply device also includes a number of nozzle arrangements for expelling the gases into the combustion chamber. Each nozzle arrangement has an inner nozzle connectable to an oxygen source and arranged for supplying pure oxygen from said oxygen source into the combustion chamber. Each nozzle arrangement also has an outer nozzle connectable in a flue gas recirculation loop of the plant and arranged for supplying flue gas flowing in said flue gas recirculation loop into the combustion chamber.

Abstract: The present invention relates to a method and a device for reducing emission from a combustion or gasification plant, said plant having an combustion chamber housing means for insertion of a first fluid into said chamber, introduction of said fluid into said chamber being effective to reduce the emission of at least one substance from said combustion and said fluid having an optimal operating temperature range for which emissions are particularly low. The temperature is established in a volume in said combustion chamber, where said volume includes the position for insertion of said first fluid. A second fluid is inserted into said combustion chamber and is effective to reduce the temperature in said volume in said combustion chamber, if said temperature is established to be higher than said optimal temperature range.

Abstract: The present invention relates to a method and a device for reducing emission from a combustion or gasification plant, said plant having an combustion chamber housing means for insertion of a first fluid into said chamber, introduction of said fluid into said chamber being effective to reduce the emission of at least one substance from said combustion and said fluid having an optimal operating temperature range for which emissions are particularly low. The temperature is established in a volume in said combustion chamber, where said volume includes the position for insertion of said first fluid. A second fluid is inserted into said combustion chamber and is effective to reduce the temperature in said volume in said combustion chamber, if said temperature is established to be higher than said optimal temperature range.