Laminar flame soot collecting and sampling device and sampling method

Abstract

The invention discloses a laminar flame soot collecting and sampling device and a sampling method, and belongs to the technical field of soot particle collection. The soot collecting and sampling device comprises a sampling replaceable capillary probe and a filter membrane holder, and a sampling hole is formed in the middle of the sampling replaceable capillary probe; meanwhile, one or two ends can be provided with threads; replacement can be carried out according to different fuels and different combustors; therefore, the problems of soot pollution of different fuels and inadaptability of thesampling device and the combustor are solved; the device can be fixed on a test bench, and can also be horizontally placed on an optical platform after the base is detached to realize accurate adjustment of up-down movement and forward and backward movement; the problems that the capillary probe of the traditional sampling device is troublesome to replace or cannot be replaced, does not adapt toa combustor, and is inconvenient and inaccurate to adjust are effectively solved.

Description

technical field [0001] The invention relates to the technical field of soot particle collection, in particular to a laminar flow flame soot collection and sampling device and a sampling method. Background technique [0002] Since the combustion of substances is a very complex process, the research on the combustion characteristics of fuels has always been the research frontier in many fields. In addition to light and heat, some harmful substances are also produced during the combustion process, causing environmental pollution. Among them, soot is generated due to insufficient combustion of fuel, which will harm the environment and human health, reduce the combustion efficiency of combustion equipment, and affect the characteristics of flame radiation and heat transfer. Malignant incontinence, uncontrolled development caused. The research on the formation mechanism and emission reduction methods of nitrogen oxides in fuel combustion has been completed, but there are still m...

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Problems solved by technology

In the invention patent of CN201710984620.7, a monochromatic laser-induced incandescent light nano-scale soot particle size measurement device is used. Although non-contact detection is guaranteed, it cannot observe information such as the shape and structure of soot, and soot particles are divided into There are two states of particle precursor and nucleating particle, and the particle precursor does not absorb visible light; in the CN201811128367.6 invention patent, the soot is collected by contact, and combined with gas dilution and blocking the impact of external airflow on the research flame, but it cannot Accurate adjustment of sampling at different heights is too cumbersome and time-consuming to adjust each time; in the CN201810390912.2 invention patent, the double-layer particle filtration system of foam alloy has a large volume, and it can only be determined macroscopically whether to reduce emissions. The absorption effect of the filter on pollutants such as soot, the collected soot is difficult to achieve secondary collection and analysis, it is difficult to apply to scientific research and analysis, and the applicable area is relatively narrow

[0007] Therefore, according to the above analysis, the soot collection and sampling device in the prior art has the influence of the sampling device on the sampling object, the sampling device is difficult to achieve accurate adjustment of sampling at different heights, and the use of different fuels cannot avoid the influence of the fuel combustion products of the previous experiment on the current Problems affecting experimental results

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