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Extraction type ultralow-concentration dust detection device and method thereof

A dust detection device and ultra-low concentration technology, applied in measurement devices, sampling devices, sampling and other directions, can solve the problems of large overall structure and inconvenient installation, achieve high practical performance, easy operation, and improve light transmittance Effect

Pending Publication Date: 2020-07-31
杭州绰美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an extractable ultra-low concentration dust detection device and its method to solve the problem that the current extractable dust meter proposed in the above background technology is divided into two types: direct extraction and extraction dilution method. The extraction and dilution method is Dilute the sample gas by volume percentage, and then test the diluted particulate gas, but its disadvantage is that the overall structure is too large and the installation is inconvenient

Method used

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  • Extraction type ultralow-concentration dust detection device and method thereof
  • Extraction type ultralow-concentration dust detection device and method thereof
  • Extraction type ultralow-concentration dust detection device and method thereof

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Embodiment 1

[0033] 1. Mie scattering theory

[0034] Light scattering method to measure aerosol concentration includes forward light scattering and backward light scattering. Among them, the forward direction light scattering measurement of particle mass concentration is the most commonly used non-contact direct reading measurement method at home and abroad. In this embodiment, the principle of forward light scattering measurement will be systematically analyzed.

[0035] First, a dimensionless particle size parameter α (α=πd / λ, where d is the particle diameter and λ is the wavelength of incident light) is introduced to describe the optical properties of particles. When α(θ) It can be solved by Rayleigh scattering formula; when α>1, the corresponding particle size range is about 0.1 μm to 10 μm, which needs to be described by Mie scattering theory, and the scattering intensity can be solved by Mie equation; when α>>1 , the scattering of particles belongs to the category of geometric opt...

Embodiment 2

[0070] Performance Testing:

[0071] The accuracy of the present invention is verified according to the JJF1716-2018 dust concentration measuring instrument type evaluation outline requirements. Using magnesium powder as the standard particle, the measured data are as follows:

[0072] Table 1:

[0073]

[0074]

[0075]According to the data in Table 1, it can be concluded that the test error of the device of the present invention is within 15%, which fully meets the requirements of the JJF1716-2018 dust concentration measuring instrument type evaluation outline. It has been proved by experiments that our product performance meets the standard requirements, and at the same time reduces The use cost of enterprises can be widely used in the field of online monitoring.

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Abstract

The invention relates to an extraction type ultralow-concentration dust detection device and a method thereof. The device comprises a center body and side blocks, wherein a central air port is formedin a bottom end of the central body, a foot end body is mounted on the outer side of a front end of the center body, a main gas outlet is formed in a top end of the foot end body, a middle foot gas opening is formed in a side end of the middle of the foot end body, an end foot gas opening is formed in a rear end of the foot end body, the side blocks are mounted at a top end of the center body, anda sample gas inlet is formed in a front end of the side block. The device is advantaged in that a complete device body can be formed by achieving matching connection of the shape structures of the side blocks and the central body and arranging a front block, a middle cylinder, end columns, a front sealing disc and the center body in a butt joint mode, guiding and conveying of air flow are facilitated, detection operation is facilitated, meanwhile, classification is fine, disassembling maintenance and part replacement maintenance can be conveniently conducted, and high practical performance isachieved.

Description

technical field [0001] The invention relates to the technical field of emission monitoring and combustion debugging, in particular to an extraction type ultra-low concentration dust detection device and a method thereof. Background technique [0002] Particulate matter, also known as dust, is a variety of solid or liquid particles uniformly dispersed in an aerosol system. Particulate matter can be divided into primary particulate matter and secondary particulate matter. Primary particulate matter is the particulate matter released into the atmosphere by direct pollution sources, such as soil particles, sea salt particles, combustion smoke and so on. Secondary particulate matter is caused by photochemical oxidation reactions between certain pollutant gas components in the atmosphere (such as sulfur dioxide, nitrogen oxides, hydrocarbons, etc.), or between these components and normal components in the atmosphere (such as oxygen) , catalytic oxidation reactions or other chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06G01N1/24
CPCG01N15/06G01N1/2258G01N2001/2261G01N15/075
Inventor 鲍轶轮王如意宁晓乐丁根生方普黄诚朱凯过俊豪
Owner 杭州绰美科技有限公司