Automatic natural gas continuous-sampling control system

A sampling system, natural gas technology, applied in the field of natural gas automatic control continuous sampling system, can solve the problems of inconsistency between sampling components and actual medium, low degree of automation, gas condensation, etc., to reduce workload, ensure personal safety, and simplify operation process Effect

Pending Publication Date: 2019-01-04
JEREH TIANJIN PETROLEUM ENG & TECH
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Problems solved by technology

When natural gas is decompressed, it may cause gas condensation, which will cause the sample components to be inconsistent with the actual medium
Full manual operation, low degree of automation

Method used

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  • Automatic natural gas continuous-sampling control system
  • Automatic natural gas continuous-sampling control system

Examples

Experimental program
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Embodiment 1

[0035] Natural gas automatic control continuous sampling system, including sampling probe 1 and pressure reducing valve 3 connected with natural gas pipeline 38, the inlet of pressure reducing valve 3 is connected with the outlet of sampling probe 1, and the outlet of pressure reducing valve 3 is divided into Two paths, one of which is connected to the pneumatic diaphragm sampling pump 7, and the other is connected to the outlet ports of the first constant pressure sampling steel cylinder 12 and the second constant pressure sampling steel cylinder 19 respectively through pipelines. The pneumatic diaphragm sampling pump 7 is pneumatically operated by the solenoid valve 29. Control, the instrument air source 37 pneumatically controlled by the solenoid valve 29 comes from the instrument air, and the solenoid valve 29 is controlled by the sampling control panel 30. 29 acts on the diaphragm of the pneumatic diaphragm sampling pump 7, and the diaphragm pump acts once to send a certai...

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Abstract

The invention belongs to the technical field of natural gas detection and particularly relates to an automatic natural gas continuous-sampling control system. The system includes a reducing valve anda sampling probe connected with a natural gas pipe. An inlet of the reducing valve is connected with an outlet of the sampling probe, an outlet of the reducing valve is divided into two paths, one path is connected with a pneumatic membrane sampling pump, and the other path is connected with outlet ends of a first constant-pressure sampling steel bottle and second constant-pressure sampling steelbottle. The system also includes a full-automatic natural gas replacement system. The automatic natural gas continuous-sampling control system can achieve continuous sampling. Since sampling is conducted once every certain time interval until the constant-pressure sampling steel bottles are fully filled, sampled gas can completely represent a fluid medium in a whole production cycle and have representativeness.

Description

technical field [0001] The invention belongs to the technical field of natural gas detection, and in particular relates to a natural gas automatic control continuous sampling system. Background technique [0002] The determination of natural gas composition can provide a strong guarantee for gas custody transfer and flow measurement. The accuracy of the determination of natural gas composition depends largely on the sampling technique. The traditional sampling system is to sample the natural gas in the pipeline through a sampling probe, and then decompress it through a pressure reducing valve, collect the natural gas in the pipeline with a sampling cylinder, and then go to the laboratory for testing. Because of the traditional sampling system, when sampling, only the natural gas medium at a certain point in time can be intercepted (such as figure 1 shown), the sampling gas is not representative. Especially if the fluid is unstable, there will be a large deviation between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
CPCG01N1/2247
Inventor 郝仲鸿史文韬曹增辉刘雪芝涂明陈飞
Owner JEREH TIANJIN PETROLEUM ENG & TECH
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