Vapor heat-carrying type boiler flue gas waste heat net recovery amount measuring method and system

The invention discloses a steam heat-carrying type boiler flue gas waste heat net recovery amount measuring method and system, and belongs to the technical field of boiler clean combustion and waste heat heat supply. The invention provides an indirect measurement method and system based on a total system energy balance and conversion relation, aiming at the problem that no direct and accurate measurement instrument is provided for the waste heat net recovery amount of a total heat air pre-heater in a steam heat carrying type boiler flue gas waste heat recovery system. The system is composed of a data acquisition assembly, a data processor, a display screen and an operation and remote transmission assembly, the data acquisition assembly comprises a temperature sensor, an intermediate water heat meter and the like, data of the data acquisition assembly is uploaded to the data processor, and calculation of intermediate parameters and net energy saving amount is carried out based on the indirect measurement princ