Constant-speed tracking sampling method for flue gas detection

Abstract

The invention provides a constant-speed tracking sampling method for flue gas detection. The method comprises the following steps: acquiring the flue flow rate of flue gas; acquiring a target flow rate of the flue gas according to the flue flow rate of the flue gas, and calculating a flow rate difference value between the target flow rate of the flue gas and an actual sampling flow rate; and on the basis of the flow difference value, controlling flue gas detection equipment, so that the sampling speed of the flue gas is equal to the flue flow speed of the flue gas. According to the constant-speed tracking sampling method for flue gas detection, the flue gas detection equipment is controlled by calculating the flow difference value between the target flow of the flue gas and the actual sampling flow, so that the sampling speed of the flue gas is equal to the flow speed of the flue gas in the flue, constant-speed tracking sampling is realized, and the measurement accuracy of the flue gas concentration is improved.

Description

technical field [0001] The present disclosure relates to the field of smoke detection, in particular to an isokinetic tracking sampling method for smoke detection. Background technique [0002] Due to the rapid increase in the density of catering oil fume emission sources, the oil fume pollution has a large amount, wide area, and strong low-altitude diffusion, which not only directly contributes to urban smog, but also causes great harm to the human body. Relevant studies have shown that particulate matter emitted from cooking fume is an important source of urban VOCs and PM2.5, and the VOCs in it react with nitrogen oxides in the environment to enhance the oxidation of the atmosphere, which will not only accelerate the formation of secondary particulate matter, but also cause Summer ozone exceeds the standard. [0003] At present, the oil fume direct-reading detection instruments based on the light scattering method used in the market are all sampling at a constant flow ra...

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Problems solved by technology

[0002] Due to the rapid increase in the density of catering oil fume emission sources, the oil fume pollution has a large amount, wide area, and strong low-altitude diffusion, which not only directly contributes to urban smog, but also causes great harm to the human body

Relevant studies have shown that particulate matter emitted from cooking fume is an important source of urban VOCs and PM2.5, and the VOCs in it react with nitrogen oxides in the environment to enhance the oxidation of the atmosphere, which will not only accelerate the formation of secondary particulate matter, but also cause Excessive ozone in summer

[0003] The oil fume direct-reading detection instruments based on the light scattering method currently on the market are all sampling at a constant flow rate, and cannot dynamically track the sampling speed according to the flue gas flow rate in the flue, thereby reducing the measurement accuracy of the oil fume concentration

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