A sub-section oscillating cavity for gas composition monitoring in natural gas pipelines

Abstract

The invention discloses a nipple type oscillating cavity for monitoring gas components of natural gas pipelines, which comprises a nipple pipe body connected to the long-distance natural gas pipeline to be measured; Outer coaxial arrangement: sieve-type inner layer tube, resin coating, inner reflection layer and outer reflection layer, an annular structure is formed between the inner reflection layer and the outer reflection layer; the inner reflection layer includes a sieve-type outer layer tube and an inner specular reflective layer arranged on the outer surface of the sieve-type outer layer tube, the outer reflective layer includes an outer steel tube and an outer specular reflective layer arranged on the inner surface of the outer steel tube; the sieve-type inner layer tube, the resin-coated layer and the sieve-type outer layer tube form a filtering permeable layer to filter natural gas; the inner specular reflective layer, the annular structure and the outer specular reflective layer form an optical oscillation cavity for accommodating the gas permeating into the annular structure molecules, forming a light circuit at the same time. The invention realizes the real-time monitoring of the gas components of the natural gas pipeline and the online collection of multiple components at the same time.

Description

technical field [0001] The present invention relates to the real-time monitoring technology of gas components in submarine natural gas pipelines, in particular to a nipple-type oscillating chamber for monitoring gas components in natural gas pipelines, which is suitable for CO2 in common submarine pipelines. 2 、H 2 S, CH 4 Real-time online monitoring of components such as water dew point. Background technique [0002] In the process of natural gas extraction, various associated gases are produced, among which the CO contained in natural gas 2 、H 2 S and other substances dissolve in the water in the pipeline during the transportation process, which will form a corrosive environment and cause corrosion to the pipeline; at the same time, the existence of the above-mentioned associated gas will also reduce the calorific value of natural gas. According to incomplete statistics, the global economic losses caused by corrosion of oil and gas pipelines are as high as tens of bill...

AI Technical Summary

Problems solved by technology

In practical applications, the water dew point is periodically detected by a dew point meter. 2 、H 2 S mostly adopts the method of periodic sampling detection, but the accuracy and real-time performance are poor

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