Device and method for monitoring concentration of ultralow-emission smoke

Abstract

The invention relates to the field of monitoring of smoke particulate matter, in particular to a device and a method for monitoring concentration of ultralow-emission smoke. The concentration monitoring device comprises an angle scattering measurement device, a beta-ray measurement device and a computer, wherein the angle scattering measurement device comprises a helium-neon laser, a laser controller, a temperature control power supply, an aerosol generator, a heating device, a particulate matter measurement zone, a photodetector and a photoelectric converter; the beta-ray measurement device comprises a beta-ray radiation source, a sampling tube, a beta-ray detector and a vacuum pump; the sampling tube is connected with the particulate matter measurement zone and the vacuum pump; the photoelectric converter and the beta-ray detector are connected with the computer; measurement results are transmitted to the computer, the computer corrects an angle scattering measurement result througha beta-ray measurement result, and corrected real-time concentration information of particulate matter is obtained. Accurate real-time measurement result can be obtained with the monitoring method, and the requirements for timeliness and accuracy of smoke measurement can be met simultaneously.

Description

technical field [0001] The invention relates to the field of monitoring smoke and dust particles, in particular to an ultra-low emission smoke dust concentration monitoring device and a monitoring method. Background technique [0002] The particle concentration of soot is one of the important parameters to characterize the emission of soot pollutants. At present, the weighing method is the general detection method for particle pollutants in the world. Based on the needs of online measurement, real-time sampling smoke concentration analysis methods such as continuous weighing method and ray method, as well as online concentration analysis methods such as charge method and light scattering method have been formed. However, with the improvement of environmental protection requirements and the progress of dust removal technology, the ultra-low emission smoke concentration and particle size have been greatly reduced. If the sampling method is used for measurement, the measuremen...

AI Technical Summary

Problems solved by technology

However, due to the uneven particle size distribution in the smoke, the commonly used single angle angle scattering method cannot know the particle size distribution in the smoke, resulting in large measurement errors

The β-ray method uses a sampling tube to collect some particles at intervals in the measurement area, and calculates the concentration of smoke and dust according to the attenuation degree of the β-ray. The measurement result of the β-ray method is more accurate, but the real-time performance is relatively poor.

[0004] For ultra-low emission smoke and dust, the measurement accuracy and real-time requirements need to be met at the same time. Therefore, the traditional angular scattering method and β-ray measurement of ultra-low emission smoke and dust cannot meet the requirements, and give accurate real-time particle size and concentration information

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