Discrete infrared spectrum greenhouse gas flow optical metering method and device

Abstract

The invention discloses a discrete infrared spectrum greenhouse gas flow optical metering method and device, and belongs to the field of greenhouse gas flow metering. The method comprises the following steps: forming N + 2 paths of narrow-band infrared light with different center frequencies; signal energy intensity changes before and after the N paths of narrow-band light penetrate through the gas are measured, and corresponding absorption coefficients S1, S2,..., SN of the N paths are obtained; one path is subjected to the same treatment, the obtained absorption coefficient is recorded as a reference absorption coefficient S, and S1, S2,..., SN and S are substituted into a relational expression between the absorption coefficient and the concentration to obtain the concentration of the gas; and enabling the other path of narrow-band light to generate two same-frequency light beams to form two interference focuses in the gas pipeline, and measuring the time when the particles carried by the gas pass through the two focuses and the distance between the two focuses to obtain the flow velocity. The invention further provides a discrete infrared spectrum greenhouse gas flow optical metering device. According to the invention, integrated measurement of flow and concentration can be realized, and the precision of greenhouse gas flow and concentration measurement is improved.

Description

technical field [0001] The invention belongs to the field of greenhouse gas flow measurement, and more particularly, relates to a discrete infrared spectrum greenhouse gas flow optical measurement method and device. Background technique [0002] Under the torrent of global carbon reduction and low carbon, the accurate measurement technology of carbon flow, which is an important part of the low-carbon technology system, is relatively weak. The key links of low-carbon actions such as factory emissions, chemical ratio, energy supply and carbon trading all require the support of accurate carbon flow measurement technology. Accurate measurement of carbon flow involves key parameters such as gas flow rate, target GHG concentration, cross-sectional area of ​​vents, etc. For specific monitoring applications, the cross-sectional area of ​​the vent is a fixed value, which is easy to measure. The key difficulty is the measurement of flow rate and concentration. [0003] Most of the c...

AI Technical Summary

Problems solved by technology

[0005] That is, in all kinds of flow rate and concentration measurement methods, there are low accuracy and reliability, and two sets of devices are required to measure the flow rate and the concentration of the target substance respectively, and there are limitations in equipment volume, cost, etc. Gas accurate on-line monitoring and integrated method and equipment

Images