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On-line detection system and method for particle size distribution of ultrafine modal particles in high temperature flue gas

A technology of high-temperature flue gas and particle size distribution, which is applied in the directions of particle and sedimentation analysis, particle size analysis, and material analysis, etc., can solve the problem of sampling device burning out, and achieve the effect of improving accuracy and reducing possibility

Active Publication Date: 2020-04-28
XI AN JIAOTONG UNIV
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Problems solved by technology

The main challenges include: the existing sampling devices are easily burned by high-temperature flames; a large amount of carbonaceous fine particles and inorganic mineral ash particles usually coexist in the high-temperature flame area, and it is difficult to distinguish between the two by existing sampling methods and measure

Method used

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  • On-line detection system and method for particle size distribution of ultrafine modal particles in high temperature flue gas
  • On-line detection system and method for particle size distribution of ultrafine modal particles in high temperature flue gas

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Embodiment

[0037] In the embodiment of the present invention, the PM cutter can also be replaced by other particle size selection devices 4, such as a cyclone separation device or an incoming flow impact separator. At the same time, according to the change of the research object range, the particle size selection with different selection effects can be replaced. Device 4 to obtain particulate matter in different particle size ranges.

[0038] The outlet of the PM cutter is connected to the inlet of the horizontal furnace 10, and the function of the horizontal furnace 10 is to oxidize the soot generated by combustion in the flue gas into CO 2 , completely remove the soot particles entrained in the particles in the flue gas, and leave the particles of mineral ash that cannot be removed by combustion.

[0039] During the detection process, the horizontal furnace 10 keeps the temperature constant, and the temperature must be guaranteed not to be lower than 800 degrees Celsius. After passing ...

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Abstract

The invention discloses an online detection system and method for particle size distribution of superfine-mode particulate matters in high-temperature smoke. The system comprises a sampling gun, a diluter, a particle size selection device, a horizontal furnace and a particulate matter particle size measurement device, wherein the sampling gun is communicated with the particle size selection devicethrough a first pipeline; the diluter is arranged on the first pipeline; a first regulation port is formed in the first pipeline between the diluter and the particle size selection device; the particle size selection device is communicated with the particulate matter particle size measurement device through a second pipeline; a first flow regulation valve is arranged on the second pipeline; the particle size selection device is further communicated with the particulate matter particle size measurement device through a third pipeline; an evacuation port, a second flow regulation valve and thehorizontal furnace are arranged on the third pipeline in sequence along the smoke flow direction; and an oxygen mixing port is formed in the third pipeline between the second flow regulation valve andthe horizontal furnace. The system and method are capable of accurately obtaining the particle size distribution of fine-mode soot and fine-mode mineral substance ash generated by combustion in high-temperature smoke.

Description

technical field [0001] The invention belongs to the technical field of flue gas particle detection, and in particular relates to an online detection system and method for particle size distribution of ultrafine mode particles in high-temperature flue gas. Background technique [0002] Combustion sources are one of the most important emission sources for the formation of smog. Understanding the formation mechanism of fine particles in the combustion process is crucial to control the emission of fine particles from combustion sources. However, at present, the sampling of particulate matter from combustion sources is mainly concentrated at the end of the tail gas where the temperature of the flue gas is relatively low, and the sampling point is relatively far behind. Particle size particles will change the particle size distribution of fine modal particles, and cannot reflect the characteristics of fine particle formation under high temperature initial conditions. If it is nec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02G01N1/24G01N1/38
CPCG01N1/2202G01N1/2208G01N1/2211G01N1/2258G01N1/24G01N1/38G01N15/02G01N2001/2282
Inventor 王学斌许鑫玮李艳谭厚章
Owner XI AN JIAOTONG UNIV
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