SCR selective catalytic reduction technology (Selective Catalytic Reduction) is a mature technology flue gas denitrification, denitrification devices are usually prepared by mixing device system from ammonia, ammonia / smoke, reactor, catalyst and control system, arranged in a boiler economizer between the air preheater and the reaction temperature is between 320 to 400 degrees. Diluted ammonia by an ammonia / air mixture is injected into the flue devices, from ammonia / flue gas boiler flue gas mixing device with fully mixed into the reactor, in the role of a catalyst, NOx NH3 reacts with nitrogen and water, thereby to achieve the purpose of removal of nitrogen oxides in the flue gas boiler.

       Process characteristics:

     (1) simple structure, high denitrification efficiency.

     (2) liquid ammonia or ammonia can be prepared by urea.

     (3) For the chemical industry, but also with ammonia ammonia desulfurization unit public station system.

     (4) easy maintenance.