Moisture-absorption characteristic measuring instrument for atmospheric aerosols

A technology of atmospheric aerosols and measuring instruments, which is applied in the direction of instruments and analytical materials, etc., can solve the problems of low degree of automation, lack of consideration of particle size distribution spectrum, and difficulty in meeting the needs of long-term stable observation, achieving good stability and high degree of automation Effect

Inactive Publication Date: 2012-10-03
中国气象局广州热带海洋气象研究所 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although foreign scientific research institutions carried out the research and development of aerosol hygroscopicity measuring instruments earlier, they mainly focused on the measurement of the hygroscopic growth factor of aerosols with specified particle sizes, and lacked the particle size distribution spectrum after particle moisture absorption.
Moreover, the degree of automation of these instruments is low, and it is difficult to meet the needs of long-term stable observation

Method used

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  • Moisture-absorption characteristic measuring instrument for atmospheric aerosols
  • Moisture-absorption characteristic measuring instrument for atmospheric aerosols
  • Moisture-absorption characteristic measuring instrument for atmospheric aerosols

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the atmospheric aerosol hygroscopic characteristic measuring instrument of the present invention comprises drying system, the first humidification system, the first particle size sorting system, the second humidification system, the second particle size sorting system, air wet flow system, particle counting system, compressed air system, data acquisition and processing system.

[0032] The drying system includes a membrane permeation dryer 11 , a pump 12 , a flow restriction hole 13 , a temperature and humidity sensor 15 , a particle filter 14 and a three-way valve 16 . The outlet of the particle filter 15 is connected to the inlet of the restricting hole 13, the outlet of the restricting hole 13 is connected to the outer wall input end of the membrane permeable dryer 11, and the outer wall output end of the membrane permeable dryer 11 is connected to the pump 12. The permeable membrane outlet of the permeable dryer 12 is connected to a three...

Embodiment 2

[0046] The difference between this embodiment and embodiment 1 is:

[0047] In order to realize the automatic control of the temperature of the water body in the water tank, the humid air flow system also includes a water tank thermostat 63 and a water body temperature sensor 64, and the water tank thermostat 63 measures the temperature of the water body in the water tank 61 through the water body temperature sensor 64 and controls the heater heating. The specific principle is: the water tank thermostat measures the temperature of the water body in the water tank through the water body temperature sensor, and when the temperature of the measured water body is lower than the set value, the heater in the water tank is started to heat the water body.

Embodiment 3

[0049] The difference between this embodiment and Embodiment 1 is: in order to ensure that the wet air flow formed by the air wet air flow system does not condense in the membrane permeable humidifier 23, 41 and cause equipment damage, the air wet air flow system also includes a connection Condensation pipe 65 on the pipe body at the outlet end of water tank 61. The wet air flow from the water tank passes through the condenser first, so that the water vapor content in the wet air flow is slightly reduced.

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Abstract

The invention discloses a moisture-absorption characteristic measuring instrument for atmospheric aerosols. The instrument comprises a drying system, a first humidification system, a first particle size sorting system, a second humidification system, a second particle size sorting system, an air moisture flow system, a particle counting system, an air compression system and a data collecting and processing system. Compared with the prior art, the moisture-absorption characteristic measuring instrument for the atmospheric aerosols has the functions of measuring not only the moisture-absorption growth factors and mixing states of the aerosols with various particle sizes but also the dry (wet) particle-size spectra, is high in degree of automation and stability, is helpful to comprehensively learning about the moisture absorption characteristic of all particle-size segments and the influence on the optical characteristics of the aerosols from the moisture absorption, and is significant in researching the atmospheric ash haze forming mechanism and other aspects.

Description

[0001] technical field [0002] The invention relates to an instrument for measuring the hygroscopic properties of atmospheric aerosol. [0003] Background technique [0004] Atmospheric aerosol refers to the particle system of solid-liquid multiphase coexistence suspended in the atmosphere with a particle size of 0.001 to 100 microns. Atmospheric aerosols directly affect the Earth's atmospheric radiation balance by scattering and absorbing radiation. Hygroscopic secondary aerosols can also act as cloud condensation nuclei, changing the concentration of cloud condensation nuclei, affecting the optical properties of clouds and the life of clouds, thereby indirectly affecting the earth's radiation balance, which is a hot issue in the field of geosciences. The hygroscopic characteristics of aerosols describe the interaction between aerosol particles and water vapor under certain water vapor conditions. They are related to the physical and chemical properties of aerosols, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00
Inventor 谭浩波许汉冰李菲万齐林银燕邓雪娇
Owner 中国气象局广州热带海洋气象研究所
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