Device and method for rapidly measuring carbon black concentration in laminar flow diffusion flames based on parallel light

Abstract

The invention discloses a device and a method for rapidly measuring carbon black concentration in laminar flow diffusion flames based on parallel light. The measuring device comprises a xenon lamp, a burner, a convex lens A, a pore diaphragm, an attenuation group, a light filter, a charge coupled device (CCD) camera and a computer, wherein the xenon lamp is capable of shooting parallel light, the burner, the convex lamp A, the pore diaphragm, the attenuation group and the light filter are arranged successively behind the xenon lamp, the CCD camera is arranged behind the light filter, and the computer is connected with the CCD camera. Wavelength of the light filter is within the visible wavelength range of the xenon lamp. According to the device and the method, the xenon lamp is used for shooting parallel light with uniform brightness, the parallel light passes through test flames, changes of parallel light intensity before and after the parallel light passes through the test flames are measured, planar carbon black particle extinction coefficients are obtained, and planar laminar flow flame carbon black concentration distribution can be obtained further. The device and the method have the advantages of being convenient and rapid to measure, low in device requirements, fast in speed, changeable in flames, good in repeatability and the like; the method and the device can be applied in both the mechanism research on carbon black and the online measurement of carbon black concentration.

Description

technical field [0001] The invention relates to a method and device for measuring the concentration of soot, in particular to a device and method for quickly measuring the concentration of soot in a laminar diffusion flame based on parallel light, and belongs to the technical field of optical testing. Background technique [0002] As an important pollutant in the combustion process, soot not only pollutes the environment, but also has extremely adverse effects on human health and production equipment; on the other hand, soot plays an important role in industrial production. Soot can enhance the radiation heat transfer of the flame and improve the heat exchange efficiency of the combustion device; adding soot to rubber can enhance its wear resistance; soot is also widely used in printing and dyeing, chemical and processing and manufacturing industries. Therefore, it is of great significance to study the mechanism of soot formation and find the key factors affecting soot forma...

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Problems solved by technology

This transposition can easily measure the concentration of dust particles in the air, but the measurement object is single, only suitable for air, etc., and cannot measure the concentration of particulate matter in tangible media, so it is not suitable for the measurement of soot concentration inside the flame

[0007] In recent years, some people have proposed a dual-wavelength measurement method for particle concentration based on the light scattering method, but these methods require the use of lasers, the investment is relatively expensive, and the process is relatively cumbersome. The test environment requires high requirements and is not fast enough. required two-dimensional pictures, these are not methods proposed for the measurement of soot concentration inside the flame

At present, no one has proposed a two-dimensional quantitative measurement method specifically for the soot concentration inside the flame

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