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Atmospheric particulate bipolar charging device

A technology of atmospheric particulate matter and charging device, applied in the direction of external electrostatic separator, etc., can solve the problem of reducing the charging efficiency of small particles, reduce pollution problems and adsorption of free electrons, reduce high-voltage electrostatic adsorption loss, and improve charging. The effect of efficiency

Active Publication Date: 2015-12-30
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

Since no particle size cutting device is set, the entry of large particle size particles in the ambient air will acquire a large number of free charges and reduce the charging efficiency of small particles

Method used

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  • Atmospheric particulate bipolar charging device

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Embodiment Construction

[0019] Such as figure 1 As shown, an embodiment of the system of the present invention includes: an impact particle cutter 1 , a particle charging chamber 2 , a high-voltage ionization chamber 3 and an alternating-frequency high-voltage power supply 4 . The impact particle cutter 1 has a cylindrical structure on the outside and a hollow cylindrical structure on the inside. The outer end of the sample gas inlet pipe 5 is cylindrical and used to connect to an external sampling pipe; the other end is designed as a small hole acceleration nozzle, which realizes the instantaneous acceleration of particles in the sample gas under the action of suction negative pressure. The cutter cover 6 and the sample gas inlet pipe 5 are designed in one piece, with a retaining edge at the end, and connected to the cutter wall 7 through threads, and an O-ring sealing ring at the connection. The upper part of the inertial impact table 8 is a roughened metal thin layer, the lower layer is a hollow ...

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Abstract

The invention discloses a device for realizing bipolar charging of particulates. A bipolar free ion region is generated by utilizing an alternating frequency high-voltage field ionizing mode, and particulates with the wide particle size range from nano scale to micron scale are charged efficiently. The device for realizing the bipolar charging of the particulates comprises a former particle cutter, a particulate charging cavity, a high-voltage ionization cavity and an alternating frequency high-voltage power supply. The device for realizing the bipolar charging of the particulates, which is disclosed by the invention, is compact in structure, is convenient to maintain, can charge the atmospheric particulates with the wide particle size range from nano scale to micron scale efficiently, can be used for early charging of the particulates based on an electromigration characteristic monitoring instrument, and enables the charged particulates to reach the balanced Boltzmann charge distribution.

Description

technical field [0001] The invention relates to a method and a device capable of realizing bipolar high-efficiency charging in a wide particle size range of atmospheric particles, and belongs to the technical field of atmospheric aerosol monitoring. Background technique [0002] In recent years, air pollution has become increasingly serious, haze events occur frequently, and the concentration of ozone and atmospheric fine particles is continuously increasing as its main features. Since the proportion of the highest concentration of nano-scale fine particles in the mass concentration is almost negligible, only monitoring the mass concentration of particulate matter can no longer meet the actual needs of air quality forecasting, pollution control and scientific research, and strengthen the measurement of particle size and concentration has important practical significance. For a long time, due to its in-situ, online, fast, and non-contact measurement advantages, optical metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C3/04
Inventor 王杰张礁石余同柱桂华侨程寅王焕钦刘建国陆亦怀范煜罗喜胜
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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