Uncertainty Analysis Method for Determination of Carbon Dioxide Concentration in Industrial Flue Gas Based on Infrared Spectroscopy

Abstract

The invention discloses an uncertainty analysis method for measuring a carbon dioxide (CO2) concentration in an industrial flue gas based on infrared spectrometry. The method comprises the following steps of (1), constructing a carbon dioxide measurement system to measure the CO2 concentration in the industrial flue gas; (2), determination the sources of uncertainties: a standard uncertainty introduced by repeated measurement, a standard uncertainty introduced by linear regression, a standard uncertainty introduced by a standard gas, a standard uncertainty introduced by instrument measurement, a standard uncertainty introduced by an intercept and a standard uncertainty introduced by a slope; (3), synthesizing a relative standard uncertainty; (4), synthesizing a relative expanded uncertainty. By using the method, uncertainty components introduced by a system error and a random error are completely analyzed in uncertainty analysis and evaluation processes; the measurement uncertainty of the CO2 concentration in the industrial flue gas is finally obtained. Related data is accurate and reliable; reliable method and basis are provided for metering the carbon emission of the industrial flue gas.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide content detection in industrial flue gas, and in particular relates to an uncertainty analysis method for measuring carbon dioxide concentration in industrial flue gas based on infrared spectroscopy. technical background [0002] As the largest developing country in the world, my country is also the largest coal producer and consumer in the world. Coal occupies a major position in my country's primary energy composition. Various burners, industrial and commercial boilers will emit a large amount of flue gas in the process of using coal, and the carbon dioxide emission in the flue gas is the main cause of the greenhouse effect. pose a serious threat to the ecological environment. In 2008, global carbon dioxide emissions reached 29.2 billion tons, of which China reached 6 billion tons. Therefore, monitoring the carbon dioxide content in the flue gas is an important aspect of environmental mo...

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Problems solved by technology

[0004] The methods for measuring carbon dioxide concentration mainly include chemical method, electrochemical method, gas chromatography, volumetric titration, etc. These methods have defects such as high cost, poor online large-scale applicability, and low accuracy.

At present, there is no detection method for carbon dioxide concentration in industrial flue gas with wide measurement range, short response time, high accuracy, strong anti-interference ability, and suitable for online large flow detection.

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