Decreasing method for nitrogen oxides with carbon

Abstract

Abstract PURPOSE: To maintain the high removing rate for NO x as a whole, by decreasing or removing NO x by contacting the exhaust gas from burners with the carbon- containing substance having a small content of N compounds such as NH 3 , CN, etc. in the volatile matter and then by preventing the generation of new NO x at the combustion of H 2 , CO, etc. generated as byproducts. CONSTITUTION: The coal 2 is fed to the fluidized bed 1 which is fluidized with the air from the introduction pipe 5 and is burned. The exhaust gas from combustion passes through the disperser 9, is dispersed into the fluidized bed 6 for denitration (above 400°C) consisting of the carbon-containing substance (e.g. char from dry distillation of coal) having a small content of N compounds such as NH 3 , CN, etc. in the volatile matter, and is reacted with the char, so as to remove NO x . The gas which has passed through the fluidized bed and yet contains a very small amount of combustible gases such as H 2 , CO, CH 4 , etc., is burnt in the freeboard 12 with the secondary air which is introduced through the pipe 10 and is dispersed from the disperser 11, and is discharged through the pipe 13 COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Daizo Kunii
• 👤 Takehiko Furusawa
• 👤 Mizuho Hirato
• 👤 Takao Hishinuma
• 👤 Yoshihiro Uchiyama
• 👤 Susumu Yoshioka
• 👤 Kazuhiko Miyamoto
• 👤 Takeo Yamagata
• 👤 Jinichi Tomuro

Bibliographic Details