Method and multi-component nozzle for reducing unwanted substances in a flue gas

摘要

A method is illustrated and described for reducing unwanted substances by injecting a reactant into a flue gas of a steam generator. In order that the reactant can also be used in larger steam generators and/or combustion chambers, a method is proposed, in which the reactant is injected into the combustion chamber of the steam generator via a reactant opening of a multi-component nozzle, in which an enveloping medium is injected into the combustion chamber through at least one enveloping medium opening arranged outside the reactant opening, and in which the enveloping medium at least partly envelops the reactant in the combustion chamber and in this way at least partly shields the reactant from the flue gas.

主权项

1. A method for reducing unwanted substances by injecting a reactant into a flue gas of a steam generator, comprising:
injecting the reactant into the combustion chamber of the steam generator via a reactant opening of a multi-component nozzle, injecting a propellant into the combustion chamber, such that the propellant supports the injection or the distribution of the reactant, forming a mixture jet comprising the reactant and the propellant in the combustion chamber, and injecting an enveloping medium into the combustion chamber through at least one enveloping medium opening arranged outside the reactant opening, wherein the enveloping medium at least partly envelops the mixture jet in the combustion chamber and at least partly shields the reactant from the flue gas.