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Diesel engine exhaust particle hierarchical sampling device and control method thereof

A technology of graded sampling and particle matter, which is applied in the direction of sampling device, measuring device, and preparation of test samples, etc., can solve the problems of graded sampling of diesel engine exhaust particles, achieve a high level of automatic intelligence, facilitate equipment maintenance, and facilitate The effect of using

Active Publication Date: 2018-06-05
XIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing diesel engine exhaust particulate matter testing equipment only measures parameters such as particle quality, quantity, particle size distribution, and smoke value, but cannot perform graded sampling of diesel engine exhaust particulate matter with different particle sizes. Analyzing the physical and chemical characteristics of particulate matter and making analysis samples

Method used

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  • Diesel engine exhaust particle hierarchical sampling device and control method thereof
  • Diesel engine exhaust particle hierarchical sampling device and control method thereof
  • Diesel engine exhaust particle hierarchical sampling device and control method thereof

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Such as figure 1 As shown, a diesel engine exhaust particulate matter fractional sampling device is characterized in that it includes a sampling and dilution system, a coarse particulate matter separation sampling system, and a fine particle charged accelerated separation sampling system.

[0028] The sampling and dilution system includes a sampling pipe 24, an air compressor 15, a heater 17, an air filter 18 and a dilution chamber 26; one end of the sampling pipe 24 is installed at the engine exhaust port, and the other end is connected to the dilution The exhaust gas inlet of the chamber 26, the first temperature pressure sensor 25, the first flow sensor 23 and the first electric flow regulating valve 22 are successively installed on the sampling pipe 24; the air inlet of the dilution chamber 26 is connected with the air flow meter 21...

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Abstract

The invention discloses a diesel engine exhaust particle hierarchical sampling device and a control method thereof. The device comprises a sampling-diluting system, a coarse particle separating-sampling system and a fine particle charged accelerated separating-sampling system, wherein the sampling-diluting system is used for mixing engine exhaust gas with the air in a diluting chamber to realize dilution of the engine exhaust gas; after the diluted exhaust gas flows through a cyclone separator, separation of coarse particles and fine particles is realized; the fine particles are charged afterpassing through a discharging electrode, are accelerated by an acceleration tube, and then enter the separator with a magnetic field to realize separation and sampling of the fine particles of different particle size ranges. In particular, the control of the initial speed of the charged particles in a magnetic field in a grader is realized by adjusting the number of opened segments of the accelerating tube in order to control the deviation radiuses of the charged particles of different particle sizes, so that the charged particles fall on sampling mediums at different positions, and graded sampling of the fine particles of different particle size intervals is realized.

Description

technical field [0001] The invention relates to the technical field of emission testing, in particular to a diesel engine exhaust particle classification sampling device and a control method thereof. Background technique [0002] While consuming a large amount of diesel engine, diesel engines also generate higher concentration of particulate matter emissions, which have caused serious harm to the atmospheric environment and human health. These particles can not only adsorb more toxic and harmful substances, but also have a strong deposition effect. They can enter the alveoli through the human respiratory system, and even ultrafine particles with small particle sizes can penetrate the human alveoli and enter the blood, thereby causing lung function damage, immune function damage, asthma, malignant tumors, lung cancer and cardiovascular dysfunction, etc. Various diseases increase the morbidity and mortality of human body. Diesel engine exhaust particulate matter can be divid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N1/38G01D21/02
CPCG01D21/02G01N1/2247G01N1/38G01N2001/2255Y02T10/40
Inventor 潘锁柱李鑫韩伟强李博仑刘兴文卢耀
Owner XIHUA UNIV
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