| 摘要 |
A water tube boiler with super low emission of nitrogen oxide (NO_X) is disclosed. The water tube boiler with super low emission of NO_X according to the present invention comprises: a combustion chamber; a reducing agent spray nozzle disposed in the combustion chamber to spray a reducing agent to remove NO_X contained in exhaust gas produced by combustion of the combustion chamber; a water pipe unit connected to the combustion chamber and provided with a plurality of water pipes formed thereon to absorb thermal energy of the exhaust gas; and an SCR cartridge disposed on a section where a temperature of the exhaust gas is 300 to 400°C to stimulate an NO_X reducing process when the temperature of the exhaust gas decreases along an exhaust passage. Accordingly, a required temperature of the SCR cartridge for removing NO_X produced by combustion of the combustion chamber is maintained to minimize NO_X emission. |
