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Method for monitoring atmospheric particles online by differential vibrating microbalance method and monitoring instrument

A technology of atmospheric particulate matter and oscillating balance, applied in the direction of using material absorption and weighing, etc., can solve the problems that cannot truly reflect the concentration of atmospheric semi-volatile particulate matter, affect the retention efficiency of the filter membrane for sampling particulate matter, and achieve high accuracy.

Inactive Publication Date: 2007-08-15
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The sampling gas, filter membrane, and oscillating tube of the oscillatory balance method atmospheric particulate matter online monitor all work at a fixed temperature of 50°. At this temperature, many semi-volatile particles deposited on the filter membrane gradually begin to volatilize, which seriously It affects the retention efficiency of the filter membrane for sampled particulate matter, so the measured data cannot truly reflect the concentration of volatile and semi-volatile particulate matter in the atmosphere

Method used

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  • Method for monitoring atmospheric particles online by differential vibrating microbalance method and monitoring instrument

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Embodiment Construction

[0026] Differential oscillation balance online monitoring method for atmospheric particles: the air pump provides power for the entire air circuit; the air flow is first cut by the PM10 cutting head 1, and then divided into three channels, of which the first channel enters the air pump 9 through the flow controller 6, and the second channel (The third road) enters the aforementioned same air pump 9 through the serial branch of electrostatic precipitator 2 (electrostatic precipitator 3), mass sensor 4 (mass sensor 5), and flow controller 7 (flow controller 8) respectively.

[0027] During normal measurement, two oscillating balance mass sensors measure at the same time, and the two electrostatic precipitators work alternately at a fixed time t as a cycle. For example, at the beginning, electrostatic precipitator 2 works, and electrostatic precipitator 3 stops working; a time period t Finally, electrostatic precipitator 2 stops working, and electrostatic precipitator 3 starts wor...

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Abstract

This invention discloses one difference vibration balance gas particles online test method and its detector, which comprises PM10 cut head, static dust remove device, flow controller, vibration balance mass sensor and gas pump part with structure as the following pattern with main principle to adopt two vibration balance mass sensor to test gas sample particles mass and particle mass within certain time to get the total mass concentration.

Description

technical field [0001] The invention belongs to an environmental monitoring method and equipment, in particular to an on-line monitoring method and equipment for atmospheric particles applied to automatic monitoring of environmental pollution. Background technique [0002] At present, the on-line monitoring instrument for atmospheric particulate matter by the oscillation balance method is widely used in the field of environmental monitoring because of its real-time monitoring of atmospheric particulate matter, high measurement accuracy, and strong environmental adaptability. [0003] Atmospheric particulate matter contains a large amount of organic matter, inorganic matter, minerals (carbon, silicon, ammonium nitrate, oxalic acid, etc.), some of which are volatile or semi-volatile (such as ammonium nitrate), and the higher the temperature, their volatile The stronger the sex. [0004] The sampling gas, filter membrane, and oscillating tube of the oscillatory balance method ...

Claims

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Application Information

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IPC IPC(8): G01N5/02
Inventor 陆钒刘建国陆亦怀王亚萍陈军黄书华丁晴
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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