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Counter-flame soot collection device and method and soot volume fraction measurement method

A collection device and volume fraction technology, applied in liquid/fluid solid measurement, measurement device, sampling device, etc., to avoid secondary experiment pollution

Active Publication Date: 2020-09-08
佛山仙湖实验室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the presence of soot also indicates the heat loss of the combustion device

Method used

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  • Counter-flame soot collection device and method and soot volume fraction measurement method
  • Counter-flame soot collection device and method and soot volume fraction measurement method
  • Counter-flame soot collection device and method and soot volume fraction measurement method

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The lower nozzle of the opposing flame burner is fed with pure ethylene gas at a flow rate of 20cm / s, and the upper nozzle of the opposing flame is fed with a mixture of nitrogen and oxygen at a flow rate of 20cm / s, wherein the molar fraction of oxygen is 25%, and the molar fraction of nitrogen is 75% %, collect the soot under the above conditions and measure the soot volume fraction under the above conditions.

[0055] Follow the steps below:

[0056] 1. Clean the collection probe 2 with acetone cleaning agent or absolute ethanol and distilled water, dry the collection probe 2, fix the polytetrafluoroethylene filter paper in the collection probe 2 with an adhesive, pass the collection probe 2 through The collection probe bracket 5 is connected to the opposite burner and its bracket 1, and the collection probe 2 is connected to the vacuum pump 4 through the pipeline 7;

[0057] 2. Select the fuel used by the opposite flame burner as ethylene gas;

[0058] 3. The lower...

Embodiment 2

[0069] The lower nozzle of the opposing flame burner feeds a mixed gas of ethylene and nitrogen at a flow rate of 20cm / s, wherein the molar fraction of ethylene is 28%, and the molar fraction of nitrogen is 72%. The upper nozzle of the opposing flame feeds a mixed gas of nitrogen and oxygen at a flow rate of 20cm / s, where the oxygen mole fraction is 90%, and the nitrogen mole fraction is 10%, collect the soot under the above conditions and measure the soot volume fraction under the above conditions.

[0070] Follow the steps below:

[0071] 1. Clean the collection probe 2 with acetone cleaning agent or absolute ethanol and distilled water, dry the collection probe 2, fix the polytetrafluoroethylene filter paper in the collection probe 2 with an adhesive, pass the collection probe 2 through The collection probe bracket 5 is connected to the opposite burner and its bracket 1, and the collection probe 2 is connected to the vacuum pump 4 through the pipeline 7;

[0072] 2. Selec...

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Abstract

The invention discloses an opposed flame soot collection device. The collection device comprises an opposed combustor and a bracket thereof, and further comprises a collection probe, a flowmeter, anda vacuum pump; the collection probe is connected with the opposed combustor and the bracket thereof through a collection probe bracket, so that the collection probe is fixed around the opposed flame combustor; polytetrafluoroethylene filter paper for collecting the soot is arranged in the collection probe, a back end of the collection probe is connected with a vacuum pump through a pipeline, and aflowmeter is arranged on the pipeline between the collection probe and the vacuum pump. An opposed flame soot collection method and a soot volume fraction measurement method are provided based on thesoot collection device. The invention provides a opposed flame soot collection device and method with low cost and simple process; the collected soot is free from pollution, and is a good microscopicstudy sample, and the invention provides a soot volume fraction measurement method which is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of soot collection, in particular to a device and method for collecting soot with an opposing flame and a method for measuring the volume fraction of soot. Background technique [0002] As we all know, the soot produced by incomplete combustion of hydrocarbon fuels has very adverse effects on the atmospheric environment and human health. And the presence of soot also indicates the heat loss of the combustion device. Therefore, it is very important to develop new technologies to control soot emission, which requires a basic understanding of the formation mechanism of soot. [0003] Soot formation is one of the most complex processes in the combustion process, involving complex interactions among combustion chemistry, fluid dynamics, heat and mass transfer, and particle dynamics. The complex process hinders the study of the formation mechanism of soot, so researchers have developed a laboratory-level laminar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24G01N1/34G01N31/12G01F22/00
CPCG01F22/00G01N1/24G01N1/34G01N31/12
Inventor 王宇周梦祥颜伏伍徐磊
Owner 佛山仙湖实验室
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