| 摘要 |
<p>PURPOSE:To perform the heat recovery of exhaust gas while removing NOx in exhaust gas, by performing heat exchange of combustion exhaust gas and combustion air in a rotary heat exchange type air preheater having denitration function, and simultaneously supplying ammonia into combustion gas. CONSTITUTION:Combustion air in an air duct 1 is raised in pressure by a forced blower 2 and heated by the exhaust gas of an exhaust gas duct 4 in an air preheater 3 while heated air is supplied to a boiler 6 from a wind box 5. The exhaust gas burnt in the boiler 6 is denitrated by ammonia from an injection pipe in the exhaust gas duct 4 and denitration thereof is accelerated by the metal catalyst in the air preheater 3. The exhaust gas, from which NOx is removed, is raised in pressure by a draft blower 9 through the air preheater 3 and a dust collector 8 and exhausted. A rotor 11, in which a heat exchanger 10 is assembled, is rotated in the air preheater by a rotary drive mechanism 12 and alternately brought into contact with the combustion exhaust gas 13 and air 14 to perform heat exchange.</p> |
