| 摘要 |
PURPOSE:To perform an effective recoverying of heating calorie kept at an ammonia receveying device and to enable an efficient ammonia release to be carried out by a method wherein ammonia discharged by a leaked ammonia recoveying device is fed into an ammoniacal reducing and denitrification device. CONSTITUTION:Discharged gas of high temperature discharge from a boiler 3 is fed into a leaked ammonia recoveying device 5 while its ammonia is adsorbed and recovered. With such an arrangement as above, the leaked ammonia recoveying device 5 is increased in its temperature and then ammonia is released. After this operation, the discharged gas of low temperature or air of low temperature discharged from the boiler 3 is fed into the leaked ammonia recoveying device 5, thereby the leaked ammonia recoveying device 5 is cooled. The discharged gas or air used for cooling operation is increased in its temperature, thereafter a system which is in common with a regenerated ammonia feeding system 10 for feeding gas containing released ammonia or an independent system is applied so as to feed the gas at an inlet port of the ammoniacal reducing and denitrification device 4. |
