SCR ammonia spraying amount intelligent monitoring system and method

The invention discloses an SCR ammonia spraying amount intelligent monitoring system and method, relates to the field of boiler denitration, solves the problems of excessive ammonia spraying amount and ammonia escape in the SCR denitration process, and particularly relates to a monitoring system comprising an SCR inlet measurement module, an ammonia spraying control module, a calculation model simulation module and a dynamic database. An SCR inlet measurement module arranged at the inlet end of the SCR reactor is connected with the input end of a calculation model simulation module; the outputend of the calculation model simulation module is connected with the dynamic database, and the ammonia spraying control module carries out intelligent ammonia spraying on the SCR reactor through NOXdistribution data and NH3 distribution data in the dynamic database. The calculation model simulation module determines corresponding NOX distribution, NH3 distribution and other data under various working conditions according