Distributed photoelectric integrated active monitoring system and method of long-distance buried pipeline leakage

Abstract

The invention provides a distributed photoelectric integrated active monitoring system and a method of long-distance buried pipeline leakage, which belong to the field of safety monitoring of important energy facilities. According to the distributed photoelectric integrated active monitoring system, a distributed photoelectric integrated temperature sensor with an electric tracing band active heating function is arranged in a buried pipeline foundation along the side lower position of a pipeline, an electric tracing band in the distributed photoelectric integrated temperature sensor is electrified and heated on time, additionally, the temperature of the pipeline foundation is collected in real time by a distributed optical fiber raman temperature measuring system, and distributed temperature curve inflection points are compared with historical data, so that the leakage position and size of the long-distance buried pipeline are actively identified and positioned. The distributed photoelectric integrated active monitoring system has the effects that optical fiber is combined with the electric tracing band, and the electric tracing band is actively heated, so that the pipeline leakage is identified and positioned with high precision according to the temperature difference caused by the difference of medium heat conductivity coefficients, and the problem of monitoring the leakage of the buried pipeline for conveying crude oil at different temperatures is effectively solved.

Description

technical field [0001] The invention belongs to the field of safety monitoring of important energy facilities, and relates to a distributed photoelectric integrated active monitoring system and method for leakage of long-distance buried pipelines. Background technique [0002] With the rapid and steady growth of my country's economy and the vigorous development of the petroleum industry, my country's pipeline construction projects have made great progress. As of August 2015, the total mileage of China's onshore oil and gas pipelines reached 120,000 kilometers, including about 23,000 kilometers of crude oil pipelines, 21,000 kilometers of refined oil pipelines, and 76,000 kilometers of natural gas pipelines. These important energy pipelines have formed my country's oil and gas pipeline network pattern spanning from east to west, from north to south, and connecting overseas, and have become an important lifeline to promote my country's economic development. Due to its long li...

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Problems solved by technology

The cost of magnetic flux leakage detection is high and the real-time performance is poor; the negative pressure wave method has problems such as low leakage location accuracy due to the unstable negative pressure wave velocity and can only monitor large leakage events.

Distributed optical fiber temperature measurement technology realizes pipeline leakage location monitoring by monitoring soil ambient temperature changes caused by crude oil leakage. The temperature difference between the two is related, the greater the temperature difference, the better the monitoring effect

At present, there is no relevant report on the distributed photoelectric integrated monitoring technology in the leakage monitoring of buried pipelines.

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