Self-diluted aerosol sieving calibration device

Abstract

The invention provides a self-diluted aerosol screening and calibration device. The aerosol gas to be calibrated is driven by a calibration fan to enter a neutralizer and a condenser for neutralization and temperature control, and then input to the electric screen through an inlet flow controller through a main inlet pipe. In the separator, the self-diluter introduces non-standard aerosol from the bypass outlet pipe to become a diluted gas, and then goes from the bypass inlet pipe to the electric sieve to mix and dilute with the aerosol to be calibrated, and then send it to the electric sieve for electronic After sieving, the aerosol that meets the particle size range reaches the calibration inlet pipe, and is sent to the particle size meter and particle concentration meter in the Wenheng calibrator for calibration under the drive of the calibration fan. After the calibration is completed, the aerosol exhaust gas passes through The exhaust gas collector is filtered and discharged, and the computer controller realizes automatic control of the entire calibration process and detection through a data line connection. The beneficial effects of the invention are: the high-precision and constant calibration of the tiny particle aerosol can be performed to meet the special requirements in the fields of environmental science, military medicine, inhalation toxicology, material science and the like.

Description

technical field [0001] The invention relates to a self-diluted aerosol screening calibration device. Background technique [0002] At present, in the fields of environmental science, military medicine, inhalation toxicology, material science and other fields, there is an urgent need to use an experimental device that can produce aerosol gas with a certain particle size and conduct scientific research such as high-precision stable calibration. , this kind of experimental device generally separates the aerosol gas according to the particle size, and then dilutes and mixes it through the aerosol dilution equipment to obtain the aerosol with the required particle size, and then input it to the calibration equipment to perform the generated and diluted aerosol Stable and constant calibration; general aerosol gas separation technology basically adopts filtration method and impact separator according to particle size. The particle size is not guaranteed to be exactly the same and ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the fields of environmental science, military medicine, inhalation toxicology, material science and other fields, there is an urgent need to use an experimental device that can produce aerosol gas with a certain particle size and conduct scientific research such as high-precision stable calibration. , this kind of experimental device generally separates the aerosol gas according to the particle size, and then dilutes and mixes it through the aerosol dilution equipment to obtain the aerosol with the required particle size, and then input it to the calibration equipment to perform the generated and diluted aerosol Stable and constant calibration; general aerosol gas separation technology basically adopts filtration method and impact separator according to particle size. The particle size is not guaranteed to be exactly the same and cannot be diluted. The particle size is still not uniform. The calibration of the particle aerosol is to take samples and then use other equipment to test and calibrate. The intermediate process is complicated and easily interfered by external pollution. Low data is inaccurate and cannot meet the requirements of current scientific research, thus restricting the development of related scientific research

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