Device and method for on-line detection of particles and liquid droplets in gas pipeline

Abstract

An online detection device and method for particles and droplets in a gas pipeline. The online detection method includes: a sampling device collects gas in the gas pipeline and introduces the collected gas into an optical device; the particles and droplets contained in the gas pass through The optical device causes light scattering through the sensitive area of ​​the optical device to generate a scattered light signal; the optical device collects the scattered light signal in the 90° direction and the scattered light signal at one or more angles in the 0-180° direction, and converts 0 ‑180° direction The scattered light signals at a certain angle or multiple angles are divided into P light signals and S light signals; the scattered light signals, P light signals and S light signals in the -90° direction are converted into -90° direction electrical signals through the photoelectric conversion unit. , P electrical signal and S electrical signal; the data processing device distinguishes the particles and droplets in the particles according to the P electrical signal and S electrical signal, gives the shape characteristics of the particles, and measures the particles and / or based on the -90° direction electrical signal. Droplet size distribution and concentration.

Description

technical field [0001] The invention relates to a particle and droplet analysis technology in a gas pipeline, in particular to an on-line detection device and method for particles and droplets in a gas pipeline. Background technique [0002] Many fields such as medical treatment, environment, industrial purification, food, energy, electronics and microorganisms have strict requirements on the particle size and concentration in the gas. For example, during the transportation of high-pressure natural gas pipelines, the existence of dust and liquid droplets will not only cause corrosion of the pipelines, but also have a negative impact on the operation of the booster equipment. Therefore, it is necessary to install a purification device during the transportation of natural gas. To collect and capture dust and liquid droplets in the gas to control the content of both in the pipeline. At the same time, particle measurement technology is needed to detect the content of dust and l...

AI Technical Summary

Problems solved by technology

[0005] 1) Unable to distinguish particle types to achieve distribution statistics and counting

When the measured particles contain both particles and liquid droplets, the two cannot be distinguished, but will be measured as the same kind of particles, and the measurement results at this time will seriously deviate from the actual situation

[0006] 2) Cannot reflect the shape characteristics of particles

For the measurement of irregularly shaped particles, most of the existing particle size spectrometers give the particle size of the calibration particles with the same scattered light, but cannot reflect the shape characteristics of the particles

[0007] 3) There are marginal measurement errors

Most particle size spectrometers or particle counters do not solve the problem of edge measurement errors, and do not screen out effective particles passing through the measuring volume, but also count the particles passing through the edge of the measuring volume, which leads to measurement and counting errors

[0008] 4) Correction of measurement results cannot be realized

[0009] 5) The use of environmental conditions is limited

Due to their structural characteristics or the temperature and pressure resistance of the sampling system, most particle size spectrometers can only be operated at normal temperature and pressure, and cannot be used in industrial environments with high temperature and high pressure.

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