초록 ▼

A method and apparatus for controlling the temperature of a flue gas stream entering a Selective Catalytic Reduction chamber in a steam generatingpower plant that utilizes Selective Catalytic Reduction (SCR) to lower NO.sub.x emissions is disclosed. The method involves the utilization of superheated

A method and apparatus for controlling the temperature of a flue gas stream entering a Selective Catalytic Reduction chamber in a steam generatingpower plant that utilizes Selective Catalytic Reduction (SCR) to lower NO.sub.x emissions is disclosed. The method involves the utilization of superheated steam to control the temperature of the flue gas prior to the flue gas entering the Selective Catalytic Reduction chamber such that there is a reduction in lost energy to the thermodynamic steam cycle caused by spray desuperheating.

대표청구항 ▼

[ What is claimed is:] [1.] A method of controlling the temperature of superheated steam in a fuel-fired steam generating power plant of the type having a thermodynamic steam cycle and a flue gas flow path acting in cooperative association therebetween, said method comprising the steps of:a. operati

[ What is claimed is:] [1.] A method of controlling the temperature of superheated steam in a fuel-fired steam generating power plant of the type having a thermodynamic steam cycle and a flue gas flow path acting in cooperative association therebetween, said method comprising the steps of:a. operating a first component of the thermodynamic steam cycle so as to produce thereby superheated steam at a first temperature and first pressure;b. operating a second component of the thermodynamic steam cycle downstream of the first component and upstream of a turbine thereof,the second component being operable to receive the superheated steam at a second temperature less than the first temperature;c. effecting an exchange of heat between the superheated steam and at least one heat exchange medium so as to thereby decrease the temperature of the superheated steam; andd. effecting the further processing of the at least one heat exchange medium and the further utilization of the superheated steam in the thermodynamic steam cycle.