Online detecting device and method for granules and liquid drops in gas pipelines

Abstract

The invention provides an online detecting device and method for granules and liquid drops in gas pipelines. The online detecting method comprises the following steps: a sampling device collects a gas in a gas pipeline and introduces the collected gas into an optical device; granules and liquid drops contained in the gas penetrate through a sensitive area of the optical device to induce light scattering to produce scattering light signals; the optical device collects the scattering light signals in -90 degree direction and the scattering light signals in a certain corner or multiple corners in 0-180 degree directions, and divides the scattering light signals in a certain corner or multiple corners in 0-180 degree directions into P optical signals and S optical signals; the scattering light signals in the -90 degree direction, the P optical signals and the S optical signals are converted into electric signals in the -90 degree direction, P electric signals and S electric signals by a photoelectric conversion unit; a data processing device distinguishes the granules and the liquid drops in particles according to the P electric signals and the S electric signals, provides the shape properties of the particles and measures the particle size distribution and concentration of the granules and / or the liquid drops according to the electric signals in the -90 degree direction.

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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