Calibration system and calibration method for aerodynamic particle size spectrometer

Abstract

The invention discloses a calibration system for an aerodynamic particle size spectrometer. The system comprises dust environment simulation equipment, wherein the equipment comprises a wind tunnel which is sequentially connected with a mixing section, a diffusion section and a testing section; a sealing end plate is arranged at the upstream of the mixing section, the mixing section is provided with at least two powder inlets, each powder inlet is provided with a monodisperse particle generating and supplying device, and the monodisperse particles supplied by the supplying devices have different particle sizes; the mixing section is also provided with a clean air inlet and the clean air inlet is connected with a clean air supplement system; and the testing section is internally provided with an aerodynamic particle size spectrometer to be calibrated and a standard aerodynamic particle size spectrometer, the downstream end of the testing section is connected with an exhaust pipeline, the exhaust pipeline communicates with an air inlet of a filter cartridge dust remover or a filter bag dust remover, an air outlet of the filter cartridge dust remover or the filter bag dust remover isconnected with an exhaust fan through an air outlet pipe, the air outlet pipe is provided with a flowmeter, and the exhaust pipeline is provided with an air supplementing port. The system ensures stable airflow in the wind tunnel and filters dust at the air outlet.

Description

technical field [0001] The invention relates to a calibration system and a calibration method, which are used for the calibration of an aerodynamic particle size spectrometer. Background technique [0002] With the continuous development of industry, the living environment of human beings has been destroyed, and the air pollution situation is severe, and the suspended particles in the air can cause haze weather. In particular, inhalable dust is the most harmful to the human body. Respirable dust refers to particulate matter with an aerodynamic equivalent diameter of 10 μm or less, which is commonly referred to as M10. In addition, particulate matter with an aerodynamic equivalent diameter of 2.5 μm or less in the ambient air is also called fine particulate matter, and is also called PM2 in daily life. 5. The aerodynamic particle size spectrometer determines the aerodynamic diameter of the particle by measuring the flow velocity of the particle in the airflow. Compared with...

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Problems solved by technology

The aerodynamic particle size spectrometer needs to calibrate the aerodynamic diameter-particle flow velocity curve of the particles. Since the aerodynamic particle size spectrometer uses the flow velocity of the airflow to determine the diameter of the particle size, the change of the airflow velocity will affect the calibration. result

[0003] The current calibration system generally uses the wind tunnel to simulate the dust environment, and the flow of the airflow in the dust simulation environment of the current system is easy to fluctuate. The dust environment simulated by the hole is generally discharged in several ways, one is directly discharged into th

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