On-line calibration system and calibration method for pm2.5/pm10 light-scattering particle monitor

Abstract

The invention discloses a PM 2.5 / PM 10 An online calibration system and calibration method for a light-scattering particle monitor, the online calibration system consists of a dynamic dilution of particles and a laminar flow mixer, a high-efficiency filter, an air compressor, a frequency conversion fan, a mass flow controller, a constant velocity sampling head, Particle filter membrane collector, constant flow sampler and other components. It can calibrate the zero point of the instrument, measurement linearity, and indication error, eliminate the influence of environmental conditions and other factors on the measurement results, and ensure the traceability and reliability of the instrument measurement results. The calibration system and method can be integrated into the light-scattering particle monitor, and can also be used as an independent calibration system to realize self-calibration, dynamic calibration and current calibration of the light-scattering particle monitor.

Description

technical field [0001] The invention relates to the field of environmental monitoring, in particular to a particle concentration measurement and calibration system in aerosol. Background technique [0002] At present, the particulate matter (PM) in my country's atmosphere 2.5 / PM 10 ) pollution situation is severe. From the perspective of the national atmospheric situation and its changes, particulate matter pollution in the atmosphere is closely related to the development of the national economy. The sustained and rapid economic development has made PM in key areas of my country 2.5 / PM 10 Pollution and heavy pollution tend to become normal. In recent years, in order to improve air quality, our country has continuously increased the intensity of environmental improvement, and promulgated policies and regulations such as the "Environmental Protection Law of the People's Republic of China" and the "Law of the People's Republic of China on Air Pollution Prevention and Cont...

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Problems solved by technology

[0003] At present, my country has initially established a monitoring network for the mass concentration of particulate matter in ambient air, and domestic and foreign environmental protection departments monitor PM 2.5 / PM 10 Commonly used methods include membrane weighing method, β-ray absorption method, and micro-oscillating balance method. These monitoring methods are characterized by high cost, high operation and maintenance workload, and low time resolution, which lead to a limited number of monitoring points, resulting in The monitoring coverage is limited, and the monitoring data cannot reflect the overall situation and change trend of the air quality in the monitoring area in real time, accurately and completely, and cannot quickly capture abnormal pollution discharge behaviors and automatically alarm and early warning methods to achieve comprehensive monitoring of pollution sources and enterprises in the area

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