Catalytic reduction-denitrification of waste gas

Abstract

Abstract PURPOSE: To raise the rate of denitrification without enlarging the apparatus and also without lowering the contacting efficiency between NO x present in waste gas and catalyst in the denitrification of waste gas to catalytically reduce nitrogen oxides in waste gas by using catalyst and ammonia. CONSTITUTION: The catalytic reduction-denitrification of waste gas is performed by passing in order waste gas through a process in which ammonia is adsorbed in catalyst, a process in which the ammonia-adsorbed catalyst is supplied to a reaction tower, and a process in which dust is removed from catalyst exhausted from the reaction tower in a repeated manner. For example, the waste gas 1 kept at a fixed temperature is introduced into the moving bed type reaction tower 2 to bring it into contact with the ammonia-adsorbed catalyst for denitrification. On the other hand, catalyst exhausted from the reaction tower 2 is passed through the screen 3 to remove dust and then introduced to the ammonia adsorption tower 4. The ammonia-adsorbed catalyst is charged to the upper part of the reaction tower 2 by the belt-conveyer 5 for recycling. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Kazutaka Katsurahara
• 👤 Yasushi Ishibashi

Bibliographic Details