Evaporation process discharge caustic alkali concentration measurement device accuracy compensation method

The invention relates to an evaporation process discharge caustic alkali concentration measurement device accuracy compensation method. The evaporation process discharge caustic alkali concentration measurement device accuracy compensation method comprises the following steps of: S1, carrying out data acquisition, i.e., acquiring process data of an alkali liquor diopter, a temperature, a caustic alkali concentration instrument value and a laboratory value in the evaporating process; S2, carrying out data preprocessing, i.e., carrying out moving average filtering processing, timing matching andnormalization processing on the process data acquired in the step 1 so as to obtain the preprocessed process data; S3, inputting the preprocessed process data into a caustic alkali concentration measurement device accuracy compensation model to acquire a compensation value; and S4, adding the caustic alkali concentration instrument value with the compensation value so as to implement online compensation of caustic alkali