Device for collecting trace dust in gas and method for detecting particle diameter and content of particles

A technology for collecting gas and dust particles, applied in measuring devices, particle and sedimentation analysis, sampling devices, etc., can solve problems such as dust content limitations, and achieve the effect of simple sampling methods

Pending Publication Date: 2018-04-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention develops a device for collecting micro dust in gas and a method for detecting particle size and content, which makes sampling simple and convenient, and can be applied to small gas sample volume (less than 100mL) and micro dust content (less than 5mg / L) At the same time, it can also be applied to the situation of atmospheric sample volume (greater than or equal to 100mL) and large dust content (greater than or equal to 5mg / L), which solves the problem that the detection of trace dust in gas is limited by sample volume and dust content

Method used

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  • Device for collecting trace dust in gas and method for detecting particle diameter and content of particles
  • Device for collecting trace dust in gas and method for detecting particle diameter and content of particles
  • Device for collecting trace dust in gas and method for detecting particle diameter and content of particles

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Step 1. When the sample gas volume is less than 100mL and the dust content is less than 5mg / L, that is, when the total amount of dust is less than 0.5mg, the dust filter E2 selects the filter membrane of perethylene chloride filter membrane, puts the filter membrane into the dust filter E2 and Connect one end of it to the three-way valve V1;

[0032] Step 2. Connect the storage device containing the gas sample to the other end of the dust filter E2, and rotate the three-way valve V1 to connect the dust filter E2 and the gas volume flow meter E1, so that the gas in the gas sample storage device passes through the gas at a slow and uniform speed. Volume flow meter E1, record the total gas volume Vg = 80mL, remove the gas sample storage after the gas is exhausted;

[0033] Step 3. Dissolve the dust-capturing perchlorethylene filter membrane in 1mL of butyl acetate, and finally spread the suspension evenly on the glass slide with an area of ​​S=1.0cm 2 ;

[0034] Step 4, ...

Embodiment 2

[0040] Step 1. When the sample gas volume is less than 100mL, the dust content is greater than 5mg / L, and the total amount of dust is less than 0.5mg, the dust filter E2 selects the filter membrane perethylene chloride filter membrane, and puts the filter membrane into the dust filter E2 and One end of it is connected with the three-way valve V1;

[0041] Step 2. Connect the storage device containing the gas sample to the other end of the dust filter E2, and rotate the three-way valve V1 to connect the dust filter E2 and the gas volume flow meter E1, so that the gas in the gas sample storage device passes through the gas at a slow and uniform speed. Volume flow meter E1, record the total gas volume Vg = 50 ~ 100mL, remove the gas sample storage after the gas is exhausted;

[0042] Step 3. Dissolve the dust-capturing perchlorethylene filter membrane in 1-2mL of butyl acetate, and finally spread the suspension evenly on the glass slide, with an area of ​​S=1-2cm 2 ;

[0043] S...

Embodiment 3

[0046] Step 1. When the sample gas volume is less than 100mL, the dust content is greater than 5mg / L, and the total amount of dust is greater than or equal to 0.5mg, the filter membrane of dust filter E2 is cellulose acetate filter membrane, and the filter membrane is loaded into dust filter E2 and weighed. Weight m1=1.7538g, and then connect one end of it with the three-way valve V1;

[0047] Step 2. Connect the air bag containing the gas sample to the other end of the dust filter E2, rotate the three-way valve V1, connect the dust filter E2 and the gas volume flow meter E1, and squeeze the air bag to make the gas flow as slowly as possible. Pass through the gas volume flow meter E1 at a constant speed, record the total gas volume Vg=78mL, and remove the air bag;

[0048] Step 3. After capturing the dust, remove the dust filter E2, weigh it as m2=1.7549g, reconnect its original end to the three-way valve V1, rotate the three-way valve V1, and connect the syringe E3 containing d...

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Abstract

The invention discloses a device for collecting trace dust in gas and a method for detecting the particle diameter and the content of particles. The device comprises a dust filter, a three-way valve,a gas volume flow rate meter and an injector, wherein the dust filter is connected with the gas volume flow meter and the injector through the three-way valve. The invention also discloses the methodfor collecting and detecting the particle diameter and the content of particles of the trace dust in the sample gas. The device and the method can be applicable to the conditions that the sample gas quantity is less than 100mL and the dust content is less than 5mg/L, and can also be applicable to the conditions that the gas quantity is greater than or equal to 100mL and the dust content is greaterthan or equal to 5mg/L; the problem that the detection of the trace dust in the gas is limited by the sample quantity and the dust content is solved.

Description

technical field [0001] The invention belongs to the technical field of natural gas hydrate development and detection, and in particular relates to a device for collecting micro dust in gas and a method for detecting particle size and content. Background technique [0002] In nature, gas hydrates are mostly stored in sandy sedimentary layers, and the sand in sedimentary layers is mostly fine-grained sand and silt. Due to the small particle size of fine-grained sand and silt, it is very easy to gushe out with natural gas during the production of natural gas hydrate, and can flow with natural gas for a long time. In the process of transporting and using these natural gas carrying dust particles, it will reduce the service life of pipelines and related machines at least, and cause safety accidents at worst. Therefore, the dust content of the gas in the pipeline, that is, the detection of particle size and dust content is very important. In order to guide practical activities s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N5/02G01N15/02
CPCG01N1/2205G01N5/02G01N15/0205
Inventor 樊栓狮郭凯王燕鸿郎雪梅
Owner SOUTH CHINA UNIV OF TECH
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