Device and method suitable for online testing of particulate matters in high-pressure gas pipeline

Abstract

The invention provides a device and a method suitable for online testing of particulate matters in a high-pressure gas pipeline. The device comprises an online testing unit, wherein the online testing unit comprises a main sampling nozzle and a flow distributor, which are sequentially connected in series; the front end of the main sampling nozzle stretches into the to-be-tested high-pressure gas pipeline, and the tail end of the main sampling nozzle is connected with a flow distributor air inlet in series; a cavity is formed in the flow distributor, two pipelines including a main path and a side path are separated from the cavity, the main path is sequentially connected with a secondary sampling nozzle, an online particulate matter grain size spectrometer and a first mass flow controller, and the side path is connected with a second mass flow controller in series; and after the main sampling nozzle carries out sampling in the high-pressure gas pipeline and the sampled gases enter the cavity by diffusion from the flow distributor air inlet, the sampled gases are discharged from the secondary sampling nozzle and the outlet of the side path. The device can further comprise an offline testing unit and a long-term online monitoring unit. According to the device provided by the invention, the long-term online testing on the particulate matters in the high-pressure gas pipeline can be realized.

Description

technical field [0001] The invention relates to a collection and analysis technology for particulate matter in pipelines, in particular to a device and method suitable for on-line detection of particulate matter in high-pressure gas pipelines, especially for on-line detection of particulate matter in high-pressure natural gas pipelines. Background technique [0002] The collection and analysis technology of particulate matter in pipelines is widely used in various gas transportation fields, such as natural gas pipelines. Due to wear and corrosion of natural gas sources and natural gas pipelines, there will be black particles such as solid impurities in the natural gas transportation process. Natural gas stations use filtration and separation equipment to remove particulate matter in natural gas, so as to ensure the normal operation of important equipment such as subsequent compressors, instruments, and valves. There is a certain resistance in the operation of the filtration...

AI Technical Summary

Problems solved by technology

The structure of the device is complex, and from the point of view of field use, the measurement results of the measuring instrument are inaccurate when the concentration is too low or too high

In addition, for long-distance natural gas pipelines, the concentration of particles varies greatly, ranging from a few milligrams to hundreds of milligrams, and the particle size ranges from 0.3 microns to 100 microns. The current detection technology is not yet capable of long-term on-line monitoring of particle concentrations in high-pressure natural gas pipelines effect, and cannot measure the content of liquid droplets in the pipe

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