Seabed natural gas hydrate bubble leakage monitoring device

Abstract

The invention discloses a seabed natural gas hydrate bubble leakage monitoring device comprising an underwater acoustic signal receiving and transmitting system, a data storage control system and a data analyzing and processing system. The underwater acoustic signal receiving and transmitting system comprises an underwater acoustic transducer array and a transducer receiving and transmitting circuit. The data storage control system controls the frequency and intensity of a transmitted signal of the underwater acoustic transducer array through the transducer receiving and transmitting circuit,and stores and records the frequency and intensity of the transmitted signal, the intensity of an echo signal and the time difference of the transmitted signal and the echo signal. The data analyzingand processing system conducts beam forming on the echo signal to distinguish the direction of the echo signal, and the volume flux of leaked bubbles is obtained by utilizing data in the data storagesystem through an inverse algorithm. Through the seabed natural gas hydrate bubble leakage monitoring device, the hydrate leakage orientation and leakage flux are effectively monitored, and a new acoustic technique means is provided for seabed natural gas hydrate bubble leakage monitoring.

Description

technical field [0001] The invention belongs to the technical field of gas leakage monitoring, and specifically relates to a device for monitoring leakage of seabed natural gas hydrate bubbles that effectively monitors leakage orientation and flux. Background technique [0002] Natural gas hydrate is a future energy source with mining value. According to the most conservative estimate, the stored energy of natural gas hydrate in the world is more than twice that of oil. Some related reports point out that the main obstacle to the exploitation of natural gas hydrate to obtain energy is not in the extraction technology At present, although there is no commercial-scale mining and it is only in the stage of small-scale trial production, before transitioning to large-scale mining, more research and analysis must be carried out to understand and evaluate the possible impact on the environment during the mining process and hazards. The accidental leakage of natural gas is one of t...

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Problems solved by technology

These two methods have their own advantages and disadvantages. The chemical and fluid delivery measuring instrument collects the leaked gas through the collection box with the bottom open, which requires the approximate location of the gas leak to be predicted, resulting in insufficient measurement range; The gas flow rate>5cm 3 the s -1 , in order to continue to have enough energy to rotate the turbine to measure the leakage rate, so small leakage cannot be measured

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