Denitrification of exhaust gas of sintering furnace

Abstract

Abstract PURPOSE: To reduce the fuel gas used prior to the denitration by passing at least a portion of the exhaust gas of the sintering furnace through a catalyst layer to oxidize CO in the exchaust gas of the sintering furnace and sending the oxidation heat at this time to a denitrating machine. CONSTITUTION: A portion of the exhaust gas 1 is entered into a heating furnace 4 through a flow control valve 15 for the exhaust gas and heated to about 400°C. Subsequently, the heated exhaust gas is entered into a catalyst layer 14 and, herein, CO in the exhaust gas is subjected to the contact oxidation. The exhaust gas is heated to about 500°C by this oxidation heat and, thereafter, is mixed with the residual exhaust gas 1 through an exhaust gas flow control valve 15' and the obtained exhaust gas with a temp. of 380W450°C is introduced into the denitrating machine 5. A high temp. exhaust gas after denitration is sent to a heat exchanger 2 and, after heat exchanged with the exhaust gas 1 sent to the heating furnace 4, the low temp. exhaust gas is discharged to the atmosphere from a chimney 6. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Noriki Kubo
• 👤 Tetsuo Sada
• 👤 Takeyoshi Ito
• 👤 Teruhiro Ikee
• 👤 Hideomi Yanaka

Bibliographic Details