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

A technology for high-pressure gas and internal particles, which is applied in the field of on-line detection of particles in high-pressure gas pipelines and on-line detection of particles in high-pressure natural gas pipelines. It can solve the problems of large particle concentration changes, complex structures, and inaccurate measurement results.

Active Publication Date: 2013-03-27
CHINA UNIV OF PETROLEUM (BEIJING)
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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 mil

Method used

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

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Embodiment 1

[0083] See Figure 4 As shown, the on-line detection device for particulate matter in high-pressure natural gas pipelines of the present invention includes an on-line detection unit I and a long-term on-line monitoring unit II. in:

[0084] The on-line detection I unit mainly includes the main sampling nozzle 1, the pipe connecting pipe 2, the flange 3, the first valve 4, the three-way ball valve 5 and the flow distributor 8 (in this embodiment, a pressure Transmitter 6 and temperature transmitter 7 are used to monitor the temperature and pressure in the flow distributor 8), two pipelines are separated from the flow distributor 8, and one pipeline is connected in series with the secondary sampling nozzle 9 and the online particle size Spectrometer 10 (using Palas company WELAS optical on-line particle size spectrometer, using the prior art high pressure resistant aerosol conduit can realize measurement under high pressure 12MPa), the first particle trap 11, the first pressure...

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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...

Claims

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Application Information

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IPC IPC(8): G01N15/02G01N15/06
Inventor 姬忠礼许乔奇陈鸿海熊至宜
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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