Method and device for predicting service life of catalyst of denitration system

The embodiment of the invention provides a denitration system catalyst life prediction method and device, and belongs to the technical field of industrial waste gas treatment. A reactor of the denitration system is internally provided with a plurality of catalyst layers, each catalyst layer comprises a plurality of catalyst subareas, and the method comprises the following steps: acquiring the inlet flue gas flow of the reactor, the flue gas flow rate of each catalyst subarea, the denitration efficiency of each catalyst subarea and the ammonia nitrogen molar ratio of each catalyst subarea; based on the inlet flue gas flow rate of the reactor, the flue gas flow rate of each catalyst subarea, the denitration efficiency of each catalyst subarea and the ammonia-nitrogen molar ratio of each catalyst subarea, the predicted activity of the catalyst of each catalyst subarea is obtained; the remaining life of each catalyst layer is determined based on the predicted catalyst activity of the catalyst zones in each cataly