The invention discloses a method and a device for measuring
sulfur content in
coal by
ultraviolet absorption spectroscopy. In the measurement method, the
decomposition scale and a threshold are determined adaptively by combining empirical mode
decomposition with 3sigma criterion, and non-stationary characteristics of
differential absorption degree per se can be fully retained, so the spectral
interference problem caused by dust,
water vapor and background gas in
combustion gas is effectively solved; the instantaneous concentration of SO2 is obtained through calculation according to the
differential absorption degree after
noise reduction and trend term removal, and the total
sulfur content accumulated in the
coal sample
combustion gas is calculated through the gas flow; the
sulfur content in the
coal can be obtained by dividing the coal sample amount by the total
sulfur content separated from the coal sample
combustion; and the pretreatment process needed to be performed on the combustion gas by coulometric
titration and an
infrared absorption method is avoided. The device for measuring the
sulfur content in the coal by the
ultraviolet absorption spectroscopy comprises a combustion furnace, a measuring chamber, an
ultraviolet light source, a
spectrometer, an air purifying device, a flow meter, a
waste gas treatment device, a computer, and the like.