Catalytic reduction apparatus for NO.sub.X reduction
First Claim
1. A constant temperature selective catalyst reduction apparatus comprising:
- at least one heat exchange element having extended surfaces, an SCR catalyst disposed at least on the extended surfaces thereof,means for providing a cooling medium to the heat exchange element for removing heat from the catalyst, andtemperature control means for controlling the cooling medium and thereby controlling the temperature of the catalyst, so as to maintain the catalyst at or near a temperature optimum for the conversion of NOx to nitrogen and water.
0 Assignments
0 Petitions
Accused Products
Abstract
An apparatus and method for reducing NOx pollution in flue gas produced by a power plant uses heat exchanger elements having extended surfaces which contain a SCR catalyst, with the heat exchanger elements located in the flue gas stream. Coolant is passed through the heat exchanger elements to cool the catalyst, with a temperature control system used to maintain the catalyst at its optimum temperature such that the maximum conversion of NOx is achieved. Utilizing the present invention, temperature cycling of the catalyst is avoided, prolonging the life of the catalyst, while at the same time optimizing the efficiency of conversion regardless of variations in the flue gas flow or temperature.
-
Citations
9 Claims
-
1. A constant temperature selective catalyst reduction apparatus comprising:
-
at least one heat exchange element having extended surfaces, an SCR catalyst disposed at least on the extended surfaces thereof, means for providing a cooling medium to the heat exchange element for removing heat from the catalyst, and temperature control means for controlling the cooling medium and thereby controlling the temperature of the catalyst, so as to maintain the catalyst at or near a temperature optimum for the conversion of NOx to nitrogen and water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification