Analysis of Uncertainty in the Determination of Coal Ash,Volatile Matter,and Total Sulfur
Based on mathematical modeling method,a comprehensive analysis was conducted on the uncertainty of coal ash content,volatile matter,and total sulfur determination.In the specific analysis,equipment such as Coulomb sulfur analyzer and industrial analyzer are used to measure and analyze coal ash,volatile matter,and total sulfur,determine the sources of uncertainty,and synthesize and evaluate each uncertainty classification.Finally,the synthetic uncertainty and expanded uncertainty are calculated.The research results indicate that the most significant component of testing uncertainty is the relative uncertainty caused by fluctuations in instrument readings.The impact on the uncertainty of coal ash content,volatile matter,and total sulfur determination is 0.01％,0.03％,and 0.08％,respectively.Sample weighing and repeatability measurement can also lead to measurement uncertainty.However,due to the relatively low uncertainty caused by related factors,appropriate neglect treatment can be implemented.
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