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An on-line measuring device and measuring method for emission concentration and particle size of soot

A measurement method and technology of a measurement device, applied in the direction of measurement devices, particle size analysis, particle suspension analysis, etc.

Inactive Publication Date: 2018-07-03
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can measure extremely low soot concentrations

Method used

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  • An on-line measuring device and measuring method for emission concentration and particle size of soot
  • An on-line measuring device and measuring method for emission concentration and particle size of soot
  • An on-line measuring device and measuring method for emission concentration and particle size of soot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] An online measuring device for measuring the concentration and particle size of exhaust smoke and dust by image method, which consists of figure 2 As shown, the device includes a laser 1, an area array image sensor 2 and a computer 5. After the laser beam 3 emitted by the laser 1 is incident on the measured smoke 4, part of the light is scattered by the smoke particles. 2 belongs to the rear side scattered light, and the rear side scattered light is received by the area array image sensor 2 placed on the rear side of the incident direction of the laser beam, and the image sensor 2 sends the measured rear side scattered light signal to the computer 5 Carry out data processing to obtain the concentration of smoke and dust.

[0043] The laser 1 can be a continuous light emitting laser or a pulse light emitting laser. When a pulse light emitting laser is used, the shutter exposure time of the image sensor 2 should be synchronized with the pulse of the laser.

[0044] When...

Embodiment 2

[0046] An online measuring device for measuring the concentration and particle size of exhaust smoke and dust by image method, which consists of image 3 As shown, in the incident direction of the laser beam emitted by the laser 1, a reflector 6 is placed in front of the measured smoke 4. After the laser beam 3 emitted by the laser 1 is incident on the measured smoke 4, part of the light is scattered by the smoke particles, and this part of the light is scattered Compared with the area array image sensor 2, the light belongs to the rear side scattered light, and the transmitted laser beam is reflected by the reflector 6, and then incident on the smoke and dust again, and part of the light is scattered by the smoke dust particles again, and this part of the scattered light belongs to the area array image sensor 2. After the front side scattered light, the back side scattered light and the front side scattered light are received by the area array image sensor 2 at the same time, ...

Embodiment 3

[0049] The on-line measuring device is equipped with two lasers, which are composed of Figure 4 As shown, the two lasers are placed on both sides of the smoke flue to be tested, arranged oppositely, the first laser beam 3 emitted by the first laser 1 is incident on the smoke, part of the light is scattered by the smoke, and the second laser beam 3 emitted by the second laser 9 The laser beam 8 is incident on the smoke and dust, and part of the light is also scattered by the smoke and dust. Compared with the area array image sensor 2, the smoke and dust scattered light of the first laser beam 3 and the second laser beam 8 are rear side scattered light and front side scattered light respectively. After the light, the rear side scattered light and the front side scattered light are received by the area array image sensor 2 at the same time, they are sent to the computer 5 for data processing to obtain the particle size and concentration of the soot particles.

[0050] The first ...

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Abstract

The invention discloses an online measuring device and method of concentration and granularity of emitted soot. The device comprises lasers, an area array image sensor and a computer. After laser beams emitted from the lasers are incident upon measured soot, partial light is scattered by soot particles, and this part of scattered light belongs to backward lateral scattered light with respect to the area array image sensor; the backward lateral scattered light is received by the area array image senor arranged at the back side of the incidence direction of the laser beams, and backward lateral scattered light signals measured by the image sensor are sent to the computer to be subjected to data processing to obtain the concentration of the soot. The online measuring device and method provided by the invention have the beneficial effects that the area array image sensor such as a CCD or CMOS area array or linear array digital camera and the laser beams are utilized to measure the concentration of the emitted soot with low concentration to high concentration, the online monitoring of soot meeting the ultra-low emission requirement is conducted, and the scattering effect of water drops in flue gas can be eliminated.

Description

technical field [0001] The present invention relates to an on-line measurement device and its measurement method for monitoring the concentration and particle size of exhaust smoke, in particular to an image method based on forward and backward light scattering of smoke particles for on-line monitoring of ultra-low emission smoke An on-line measuring device for measuring and a measuring method thereof. Background technique [0002] Coal-fired power plants burn coal to produce a large amount of soot and smoke, which will cause great environmental pollution if they are directly discharged into the atmosphere. To this end, coal-fired power plants have installed desulfurization, denitrification and dust removal devices to reduce the emission of soot and flue gas. In order to further reduce the smoke and dust emissions of coal-fired power plants, more and more power plants have adopted ultra-low emission reduction measures, which have greatly reduced the concentration of smoke a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/06G01N15/02
CPCG01N15/0205G01N15/06G01N2015/0693
Inventor 蔡小舒
Owner UNIV OF SHANGHAI FOR SCI & TECH
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