Monitoring device and monitoring method for ultralow emission smoke

Abstract

The invention provides a monitoring device and a monitoring method for ultralow emission smoke. The monitoring device is used for monitoring particle size distribution and concentration of smoke in a smoke measuring area. The monitoring device comprises a multi-wavelength laser light source part and a multi-angle photoelectric detection part, wherein the multi-wavelength laser light source part comprises a plurality of laser devices, a coupler and a collimator; the laser devices are used for emitting the laser light in different wavelengths; the coupler is used for coupling the laser light in different wavelengths; the collimator is used for collimating the laser light after being coupled and acquiring the multi-wavelength laser light used for irradiating the smoke measuring area; the multi-angle photoelectric detection part comprises a plurality of photoelectric detectors, a signal modulator and a signal processor; the photoelectric detectors are respectively arranged at certain angles with the collimator and are used for distinguishing the strength of laser light with different wavelengths, receiving the multi-wavelength laser light after smoke particle scattering and converting into an electric signal; the signal modulator is used for receiving the electric signal and modulating; the signal processor is used for processing the electric signal after being modulated, so as to acquire the particle size and concentration of the smoke.

Description

technical field [0001] The invention belongs to the field of dust particle size and concentration testing, and in particular relates to an ultra-low emission dust monitoring method and device based on the principle of multi-wavelength and multi-angle laser angle scattering. 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. Due to the need for online measurement, real-time sampling smoke concentration analysis methods such as continuous weighing method and β-ray method, and online concentration analysis methods such as charge method and light scattering method have been formed. . [0003] However, with the improvement of environmental protection requirements and the progress of dust removal technology, the concentration and particle size of ultra-low emission smoke and dust hav...

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Problems solved by technology

[0005] However, for ultra-low emission dust, the influence of particle size on angular scattering light intensity cannot be ignored. Therefore, the current traditional angular scattering method and industrial measuring instruments have large errors in measuring ultra-low emission dust, and the particle size distribution (particle size) cannot be obtained. )information

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