The invention relates to a synchronous reckoning method of utility
boiler efficiency and
coal heat value as well as ash content and
moisture content, wherein air supply temperature,
smoke exhaust temperature,
smoke exhaust
oxygen content, carbon content in
fly ash, boiler-fed fuel content, boiler
evaporation amount,
assembly electric generating load, main
steam pressure temperature, reheated steam inlet / outlet
pressure temperature,
water supply pressure temperature and flow rate,
steam drum pressure, reheater temperature lowering
water jet amount and steam extraction
pressure temperature of each heater of
high pressure cylinder are
read through a
plant-level supervisory
information system (SIS) of a thermal power
plant; and the parameters as the
water temperature and drainage temperature of the inlet / outlets of different-level heaters of the
high pressure cylinder are synchronously reckoned by hypothesizing the initial values of the
coal heat value, the
coal ash content and the coal
moisture content, utilizing a boiler anti-balance heat efficiency model, a dry air amount required for theoretical
combustion and actual
smoke quality simplified calculating model, an actual smoke quality calculating model, an actual smoke volume calculating model, an actual smoke amount calculating model, a boiler positive-balance heat efficiency model and a boiler effective utilized heat model, and establishing prediction and rectification methods.