Measuring device and method for mass concentration and particle size spectrum of fixed pollution source particles
A technology for fixing pollution sources and mass concentrations, which is used in measuring devices, particle and sedimentation analysis, particle size analysis, etc., to achieve the effect of increasing measurement and improving accuracy
Active Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
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[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a measuring device for the mass concentration and particle size spectrum of particulate matter from fixed pollution sources, thereby solving the technical problem of how to measure the particle size spectrum of smoke particles emitted by fixed pollution sources
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[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0029] The present invention proposes a combination of diffraction and scattering combined optical measurement of particle spectrum and micro-oscillating balance correction. The invention can be used to measure the particle size spectrum and mass concentration of smoke particles discharged from fixed pollution sources, and PM10 can be obtained through the particle size spectrum. Information such...
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The invention discloses an online monitoring device and method for the mass concentration and particle size spectrum of fixed source emissions from a power plant based on light scattering technology. Laser beams of different wavelengths enter the measurement area in parallel through their corresponding entrance holes at the same time, and are aligned with the measurement area to be measured. Gas interaction is mainly scattering and absorption. The scattered light generated by different lasers enters one end of the corresponding quartz rod through the reflector. The scattered light enters the photodetector through the quartz rod and is converted into an electrical signal. The electrical signal The signal is input to the microprocessor after passing through the signal conditioning circuit. The microprocessor sends the data to the terminal through the serial port interface. The terminal calculates the mass concentration and particle size spectrum, and finally displays the results. Using the present invention, the particle size spectrum information can be obtained while obtaining the mass concentration of particulate matter. In addition, the present invention uses a calibration unit to calibrate the measurement system, thereby improving the reliability of the device.
Description
technical field [0001] The invention belongs to the field of on-line monitoring of discharges from stationary pollution sources, and more specifically relates to a measuring device and method for mass concentration and particle size spectrum of particulate matter in discharges from stationary pollution sources of power plants based on three-wavelength scattering signals. Background technique [0002] Studies have shown that the flue gas emitted by coal-fired power plants after dedusting is mainly PM10 and PM2.5. According to the latest standards of the United States Environmental Protection Agency (United States Environmental Protection Agency), PM2.5 in stationary pollution sources is the most harmful pollutant to air quality, and they are the core cause of atmospheric smog. At the same time, particles with a particle size of less than 2.5um can be inhaled into the human body. After being inhaled into the human body, they will directly enter the bronchi, interfere with the ...
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IPC IPC(8): G01N15/06G01N15/02
CPCG01N15/0211G01N15/06G01N15/075
Inventor 朱明王殊肖骁陈昂鲁绍安袁晓东陈鼎
Owner HUAZHONG UNIV OF SCI & TECH