SCR (Selective Catalytic Reduction) catalyst life determination method, system, equipment and medium

The invention discloses a method, a system and equipment for determining the service life of an SCR (Selective Catalytic Reduction) catalyst and a medium. The method comprises the following steps: acquiring historical reaction data of the SCR catalyst in an SCR reactor; historical reaction data are input into the mechanism model for calculation, and theoretical outlet nitrogen oxide concentration, ammonia gas adsorption quantity parameters and identification parameters are obtained; optimizing the ammonia gas adsorption capacity parameters and the identification parameters through a particle swarm algorithm to obtain a fitting relation curve of the ammonia gas adsorption capacity parameters and an optimal identification parameter; updating the mechanism model according to the fitting relation curve and the optimal identification parameters to obtain an updated mechanism model; the ammonia spraying flow, the inlet nitrogen oxide concentration and the corresponding flue gas flow are selected from historical rea