SCR (Selective Catalytic Reduction) is a well-established flue gas denitrification technology. A denitrification unit typically comprises an ammonia generation system, an ammonia/flue gas mixing unit, a reactor, a catalyst and a control system. It is situated between the boiler economiser and the air preheater, with a reaction temperature ranging from 320 to 400 degrees. Ammonia is diluted by the ammonia/air mixing unit before being injected into the flue. It is thoroughly and uniformly mixed with the boiler flue gas in the mixing unit and then enters the reactor. Under the action of the catalyst, NOx reacts with NH₃ to form nitrogen and water, thereby achieving the removal of nitrogen oxides from the boiler flue gas.

Process characteristics:

(1) Simple structure and high denitrification efficiency.

(2) Ammonia can be prepared from liquid ammonia or urea.

(3) For chemical plants, the ammonia station system can be shared with ammonia-based desulphurisation units.

(4) Easy to maintain.

SNCR flue gas denitrification technology

SNCR flue gas denitrification technology Product Details SNCR (Selective Non-Catalytic Reduction) is a low-cost denitrification technology. This technology utilises the furnace as a reactor, spraying a reducing agent (commonly ammonia water or urea solution in industrial applications) into the furnace at temperatures ranging from 900 to 1100°C, where it reacts with the NOx in the…

SNCR/SCR hybrid denitrification process

SNCR/SCR hybrid denitrification process Product Details Basic Principles SNCR/SCR hybrid denitrification technology is an integrated process, rather than simply the combined use of SCR and SNCR processes. It is a novel, highly efficient and technically mature improvement on the SCR process, developed by building upon the SCR process and combining it with the cost-effective characteristics…