EAI Offers Superior Servicing of Selective Catalytic Reduction Units:

Selective Catalytic Reduction Systems

The selective catalytic reduction system is a means of converting nitrogen oxides (also referred to as NOx) with the aid of a catalyst into diatomic nitrogen and water. Typically anhydrous ammonia, aqueous ammonia or urea, is added to a stream of the flue or exhaust gas and is absorbed onto the catalyst.   The combination of the contaminants in the fuel and the ammonia can lend to formation of ammonia salts downstream where they plate out or deposit onto the gas side of the fin tubes thus reducing heat transfer efficiency and promoting corrosion on the back end of the HRSG.

In addition to the cleaning services that EAI offers for removing the fouling or ammonia deposits from the fin tubes, EAI also offers cleaning methods and services to clean the SCR, SCO and CO catalyst modules to aid in reducing back pressure and keep the reactive surfaces of the catalyst clean so that it can perform its function.

The rust, dust, and debris that is transported in the exhaust gas can plug the catalyst modules causing significant increases in back pressure and thus reducing the capacity of the plant. Insulation failures upstream of the catalyst can also quickly cover the catalyst surface and choke off the flow through the HRSG. EAI can quickly and efficiently clean the catalyst walls to eliminate these performance robbing conditions.

Contact EAI for more information on our servicing of Selective Catalytic Reduction Systems