Aerosol moisture absorption characteristic comprehensive measuring instrument

Abstract

The invention discloses an aerosol moisture absorption characteristic comprehensive measuring instrument, which comprises an aerosol pretreatment system, a first particle screening system, a humidifying system, a second particle screening system, a diluting and humidifying system, a condensed particle counting system, a compressed air system, a temperature and humidity monitoring and calibrating system, a parameter measuring system and a signal acquisition and control system. By means of the aerosol moisture absorption characteristic comprehensive measuring instrument, the humidification flowis large, humidification is fast, the measurement precision is high, and self-correction can be achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, and in particular relates to an instrument for comprehensive measurement of aerosol moisture absorption, moisture absorption growth factor, and optical, density, shape and other characteristics before and after moisture absorption. Background technique [0002] Atmospheric aerosols can directly absorb and scatter solar radiation, and have a direct impact on atmospheric radiative forcing; for aerosols with relatively strong hygroscopic properties, when the relative humidity in the atmosphere increases, the aerosols will absorb moisture and grow into cloud condensation nuclei. Facilitating cloud formation and altering cloud residence time and one-sided albedo have indirect effects on atmospheric radiative forcing. Atmospheric aerosols have great uncertainty in the radiative forcing effect of aerosols due to the complexity of their composition and the diversity of temporal and spatia...

AI Technical Summary

Problems solved by technology

[0004] The flow rate of H-TDMA is relatively small, and the follow-up measuring instrument of H-TDMA is only one Condensation Particle Counter (CPC). When it is necessary to observe the characteristics before and after moisture absorption such as optics and density, it is difficult to satisfy, and the observed moisture absorption characteristics are not systematic; the humidification speed is slow, and the current H-TDMA mainly adopts two-stage humidification, and the aerosol needs to be humidified from a very low relative humidity to a specific relative humidity. Humidity, long humidification time, slow speed; low measurement accuracy, no self-calibration, currently used temperature and humidity sensors have relatively low measurement accuracy, and once the sensor measures relative humidity errors, the problem cannot be found immediately, which may lead to measurement errors There is a large deviation in the data

Images