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A device and method for improving the efficient charging of atmospheric fine particles

A technology for atmospheric fine particles and particulate matter, which is applied in electrostatic and electrical components, etc., can solve the problems of high-efficiency charging of atmospheric fine particles and reduce the charging efficiency of small particles, so as to reduce the loss of high-voltage electrostatic adsorption, compact structure and high efficiency. The effect of charging

Active Publication Date: 2016-01-20
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

The charge neutralization source is a bipolar charge neutralization source, and it is difficult to achieve efficient charging of atmospheric fine particles, especially nano-scale ultrafine particles
At the same time, since no particle size cutting device is designed, the entry of large-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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  • A device and method for improving the efficient charging of atmospheric fine particles

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Embodiment Construction

[0027] Such as figure 1 As shown, the embodiment of the high-efficiency charging device for atmospheric fine particles of the present invention includes: an impact particle cutter 1 , a particle charging chamber 2 , and a high-voltage power supply 3 . The impact particle cutter 1 has a cylindrical structure on the outside and a cylindrical hollow structure on the inside and outside, and is composed of a sample gas inlet pipe 4 , a cutter cover 5 , a cutter wall 6 , and an inertia impact table 7 . The outer end of the sample gas inlet pipe 4 is cylindrical and used to connect to an external sampling pipe; the other end is designed as a small-hole acceleration nozzle to realize instantaneous acceleration of particles in the sample gas. The cutter cover 5 and the sample gas inlet pipe 4 are designed in one piece, with a retaining edge at the end, and connected to the cutter wall 6 through threads, and an O-ring sealing ring at the connection. The upper part of the inertia impact...

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Abstract

The invention relates to a device and a method for enhancing the high-efficient charging of atmospheric fine particles. Firstly, a high-voltage field ionization method is utilized to produce sufficient free charges, and an external migrating electric field is then utilized to migrate the free charges into a particle-charging region in order to realize the high-efficient charging of atmospheric fine particles. The device comprises an impact type particle cutter, a particle-charging chamber and a high-voltage power supply. The device has a compact structure, is convenient to maintain, and can realize the high-efficient charging of atmospheric fine particles below 1Mu m. The invention can be used in the prestage charging of particles on the basis of an electric migration characteristic monitoring device and for ensuring that the particles can reach Boltzmann charge balance distribution.

Description

technical field [0001] The invention relates to a device and a method for improving the charging efficiency of atmospheric fine particles, belonging to the technical field of atmospheric aerosol monitoring. Background technique [0002] In recent years, the rapid development of the domestic industrial economy has also brought serious environmental pollution problems. Taking air pollution as an example, under the current complex pollution background conditions, the concentration of ozone and atmospheric fine particles has become its main feature. The traditional particle mass concentration monitoring can no longer fully reflect its pollution characteristics. Strengthen the measurement of particle size and concentration. has important practical significance. Particulate matter directly discharged into the atmosphere by human production and life, due to its large particle size, can use optical methods to directly measure its particle size and concentration; while secondary par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05F3/00
Inventor 王杰余同柱张礁石桂华侨程寅王焕钦刘建国陆亦怀李德平范煜罗喜胜
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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