Online particle monitoring system and method based on beta ray method and light scattering method

Abstract

The invention provides an online particle monitoring system and method based on a beta ray method and a light scattering method. The system and method are used for precisely measuring the concentration of particles in smoke online in real time. The advantages of the beta ray method and the advantages of the light scattering method are combined, the reference standard of a beta ray method measuring result to a light scattering method measuring result is achieved through an internal reference method, and therefore the concentration of the particles in smoke is precisely measured online in real time. The measuring result is not influenced by the size, color, chemical constitution change and other characters of the particles, and the advantages of being high in precision, outputting figures in real time and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and relates to an on-line particle monitoring system and method based on a beta ray method and a light scattering method. Background technique [0002] In accordance with the requirements of the national "Air Pollution Prevention and Control Action Plan", it is necessary to speed up the upgrading and transformation of existing dust removal facilities for coal-fired boilers and industrial furnaces to ensure that the concentration of particulate matter is stable and meets the emission standards. A series of standards such as the "Emission Standards of Air Pollutants for Thermal Power Plants" (GB13223-2011) promulgated by the state have reduced the concentration of particulate matter emissions in stationary source exhaust to 30mg / m 3 the following. At present, most units with a single installed capacity of more than 300,000 kilowatts have adopted the dust removal technology of elec...

AI Technical Summary

Problems solved by technology

The β-ray method directly measures the mass concentration without conversion and calibration. The measurement accuracy is high, and the measurement results are not affected by the characteristics of particle size, color, and chemical composition changes. However, the detection process takes a period of time and the measurement results cannot be released in real time.

Although the micro-oscillating balance method has high measurement accuracy, the instrument is expensive and is easily affected by humidity. The detection process takes a period of time and the measurement results cannot be released in real time

At present, there is no method and system that can accurately measure the concentration of particulate matter in flue gas online and in real time

Images