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Quick particle humidity control device and control method thereof

A rapid control and particulate matter technology, applied in the direction of humidity control, non-electric variable control, control/regulation system, etc., can solve the problems of fast time change, unable to meet the real-time control requirements of particulate matter humidity, and long time required for humidity adjustment, etc., to achieve Improve applicability, improve humidity exchange efficiency, and promote the effect of water vapor diffusion

Inactive Publication Date: 2018-08-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

Zeng Limin of Peking University and others have proposed an aerosol humidity control device, which uses saturated condensation and constant temperature heating to control aerosol humidity, but this method requires a long time for humidity adjustment, and the particle size and chemical composition of atmospheric particles vary with the temperature. Time changes quickly, so this method cannot meet the real-time control requirements of particulate matter humidity in online measurement scenarios

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  • Quick particle humidity control device and control method thereof
  • Quick particle humidity control device and control method thereof

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing:

[0027] Such as Figure 1-Figure 2The device for quickly controlling particle humidity includes a clean air generating unit, an airflow drying channel, an airflow humidifying channel, an airflow mixing unit, a humidity measurement and adjustment unit, and a particle humidity exchange unit 20 . The clean air generating unit includes an air compressor 1 , a cooler 2 , an oil-water separator 3 , a coalescing filter 4 and an air dryer 5 connected in sequence. The inlet of the air compressor 1 is connected to the gas source, the outlet is connected to the inlet of the cooler 2, the outlet of the cooler 2 is connected to the inlet of the oil-water separator 3, the outlet of the oil-water separator 3 is connected to the inlet of the coalescing filter 4, and the coalescing The outlet of the filter 4 is connected to the inlet of the air dryer 5, and the outlet of the air dryer 5 is ...

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Abstract

The invention relates to a quick particle humidity control device and a control method thereof. The device comprises a clean air generating unit, an air flow drying channel, an air flow humidifying channel, an air flow mixing unit, a humidity measuring and adjusting unit and a particle humidity exchange unit. The air flow drying channel consists of a Nafion drying tube, a high-efficiency filter, aneedle valve, and a vacuum pump. The air flow humidifying channel includes a Nafion humidification tube, a deionized water storage tank, and a plug. The air flow mixing unit includes a three-way solenoid valve, a mixing tube, and a blade. The humidity measuring and adjusting unit includes a humidity sensor, a microcontroller, a PID algorithm processing unit, and a pulse width modulation drive circuit. The particle humidity exchange unit includes a microporous liner tube, a stainless-steel casing pipe, a humidity sensor, and a vacuum pump. According to the invention, humidity control of the sampling particle is realized during the online particle measuring process and the relative humidity is adjusted randomly between 10% to 90%; and the humidity switching response time is lower than 60 seconds.

Description

technical field [0001] The invention relates to the technical field of aerosol analysis and monitoring, in particular to a device for rapid control of particle humidity and a control method thereof. Background technique [0002] Changes in ambient air humidity directly affect the water content of atmospheric particulate matter, resulting in changes in particle size and phase state. Atmospheric particulate matter undergoes gas, liquid, and solid phase transfer and dynamic distribution in the process of environmental temperature and humidity changes. The moisture absorption and evaporation process will change the particle size distribution, optical properties, chemical composition and activation cloud efficiency of atmospheric particulate matter, which belongs to the research field of particulate matter. One of the basic questions. The measurement of the physical and chemical properties of particulate matter is usually carried out under dry conditions, but under the actual ...

Claims

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Application Information

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IPC IPC(8): G05D22/02
CPCG05D22/02
Inventor 张礁石刘建国桂华侨杨义新余同柱杜朋王文誉赵欣王杰程寅陆亦怀刘文清
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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