METHOD FOR DECREASING THE NITROGEN-OXIDE CONTENT IN FLUE GAS

摘要

The concn. of nitrogen oxides in an effluent (I) at below 1450 deg is decreased by (a) introducing a treatment agent (II) comprising a substd. or unsubstd. hydrocarbon (III), effective to decrease the concn. of nitrogen oxides in (I); and (b) varying at least one of the parameters (i) dilution and introduction rate of (II), (ii) components of (II), (iii) relative amts. of such components, and (iv) injection position, so that the nitrogen oxide concn. in (I) is decreased while minimising prodn. of other pollutants, esp. ammonia.