Microwave hydrolysis reactor for large scale conversion of urea into ammonia for use in removal of nitrogen oxides from flue gas, especially in power stations

摘要

A microwave hydrolysis reactor (1) effects catalytic conversion of urea in a urea/water mixture in the presence of microwave energy to produce an ammonia/water mixture. A microwave hydrolysis reactor (1) for converting urea into ammonia comprises: (a) one or more reaction chambers (2) with a urea/water mixture supply (3), an ammonia/water mixture outlet (4) and a catalyst (7) for catalytic conversion of urea into ammonia; and (b) a microwave transmitter (8) for supplying energy to the urea/water mixture in the (or each) reaction chamber. An Independent claim is also included for a flue gas deNOX unit, especially for power stations, which comprises the above reactor. Preferred Features: The catalyst (7) comprises capillary tubes provided with a catalytically active substance at least on their insides. The microwave transmitter (8) is designed to evaporate the urea/water mixture in the (or each) reaction chamber (2).