Digital representation method of coal-fired boiler operation state

The invention discloses a digital representation method of a coal-fired boiler operation state. The method comprises the steps that data is collected from four main tubes of a boiler; according to thecollected data, the corrosion rate of the boiler and parameters needed by the residual service life are calculated respectively; key data affecting boiler operation is screened out from the collecteddata according to corresponding boiler operation safety requirements; the residual wall thickness value of the boiler tubes, the residual service life value of the boiler and the smallest allowable thickness value of the boiler tubes are calculated respectively; the residual wall thickness valve, the residual service life value and real-time temperature and pressure values of the boiler are compared with specified allowable operation parameters of the boiler; the overall operation state of the boiler is judged; three state intervals are represented by different colors; different serial numbers are given to different b