The catalyst regeneration method of the urea hydrolysis apparatus and urea hydrolysis apparatus

A reactor easy to catalyst regeneration without removing the hydrolysis catalyst from the provision of methods know the timing of the hydrolysis catalyst degradation and catalyst regeneration. A contacting urea water U in a heating atmosphere and hydrolysis catalyst 1, the ammonia A is generated, urea hydrolysis apparatus for reducing nitrogen oxides blown into the combustion flue gas in the furnace 10 or the flue, internal in a reactor 2 having a hydrolysis catalyst layer 1, a urea water supply line 3, the urea water spray nozzle 6 for spraying urea water, and heating the air supply line 7 for supplying heating air a 'into the reactor 2 , the ammonia supply line 11, the ammonia spray nozzle 12, a urea water bypass line 14, and a second urea water spray nozzle 15 for spraying the urea water U to the furnace 10 or the flue, urea water supply during catalyst regeneration stopping the supply of the urea water U to interrupt the line 3, only the heated air a 'by heated air supply line 7 is supplied to the reactor 2 was passed through the gas to the hydrolysis catalyst layer 1, to regenerate the catalyst urea hydrolysis instrumentation . .FIELD 1