Quasi-monodispersed submicron aerosol generating device using vaporization condensation process

Abstract

The invention relates to a generating device of quasi-monodispersed submicron aerosol by using an evaporation condensation method. The generating device comprises a high-pressure gas source, a first filter, a sprayer, a diffusion desiccator, a second filter, a saturator, a reheater, a condenser tube, and a first valve as well as a second valve, wherein, the first valve and the second valve are respectively used for adjusting the flow capacity of the second filter and the saturator; the high-pressure gas source adopts a high-pressure air source; the reheater and the condenser tube adopt metallic conduits; a baffle plate is arranged at a jet exit of the sprayer; a screen mesh or a closing ring is arranged at the inlet of the condenser tube. The generating device is convenient and durable, the running cost is low, the median diameter in aerosol generating counting ranges from 0.08 micrometres to 0.5 micrometres, the geometric standard deviation is less than 1.3, the counting concentration ranges from 1*10<4> to 1*10<8>/cm<3>, the stability and the repeatability are good when in generation, and the requirements of various equipment inspections and experimental researches can be satisfied.

Description

A quasi-monodisperse submicron aerosol generating device by evaporation and condensation method technical field The invention relates to a device for generating quasi-monodisperse submicron aerosols by evaporation and condensation method. The median diameter of generated aerosol counts is 0.08 μm to 0.5 μm, the geometric standard deviation is less than 1.3, and the count concentration is 1×104 to 1×108 / cm3. Background technique Aerosol is a dispersion system formed by dispersing liquid or solid particles with a diameter of 0.002-100 μm in a gas medium. The generation of aerosols that are stable and conform to a certain particle size distribution is an important aerosol technology, which is mainly used in research and application fields such as calibrating measuring instruments, conducting aerosol experimental research, and developing and testing air purification and sampling equipment. Generally divided by particle diameter, aerosols are mainly divided into two types: mi...

AI Technical Summary

Problems solved by technology

In order to overcome the inconvenient application of the current evaporative condensation method aerosol generating device when submicron particle size aerosols are generated, the cost is relatively high, and the monodispersity of the aerosol needs to be improved. The purpose of the present invention is to provide a quasi-monodisperse The submicron aerosol generating device makes it convenient, durable, and low in cost, while further improving the monodispersity of the submicron aerosol

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