Natural gas hydrate state change simulation experiment photoelectric detection system

Abstract

The invention relates to an analog testing and photoelectric detecting system of natural gas hydrate state change. The top end of high-pressure balancing kettle in temperature control water tank is set with windows and the scattering illumination emitter heads are set in the windows, where the ring-optical fiber beam illuminated CCD camera is set outside the right window and the optical signal receiver head is set outside the left window and linked with the photoelectric detecting controller, the optical fiber cold light source is linked with the CCD, scattering illumination emitter heads and photoelectric detecting controller through the optical fiber beam, CCD is linked with the photoelectric detecting controller through combined cable, and the photoelectric detecting controller is linked with the industrial control computer and real-time monitoring system. It adopts optical fiber illumination, to make real-time observation and monitoring, and shoot&record on the whole change course of synthesis and decomposition state of the natural gas hydrate in the balancing kettle in underwater narrow space and at high pressure and low temperature as well as make measurement & record on optical permeability and scattering properties.

Description

1. Technical field [0001] The invention relates to a photoelectric detection device, in particular to a photoelectric detection system for a simulation experiment of the state change of natural gas hydrate. Two background technology [0002] Natural gas hydrate is an ice-like crystalline compound produced by water and natural gas (methane, etc.) under high pressure and low temperature conditions. It widely exists in the deep sea bottom of the ocean, and its reserves are much larger than oil and natural gas. It will be the oil of this century. It is the main substitute of natural gas and natural gas, and it is also the future strategic energy reserve. Therefore, it is of great strategic significance to explore and develop gas hydrate resources. When researching and implementing the development plan of natural gas hydrate, due to the different geological conditions in various countries, the composition and formation mechanism of natural gas hydrate are different. Canada and ...

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Problems solved by technology

Although the laboratory research results of gas hydrates have been reported in relevant reports, the visualization research and detection of gas hydrate state and phase transition have not been realized in the experimental research of these gas hydrates, and no relevant reports have been seen.

[0003] In the natural gas hydrate simulation device of the Japan Geological Survey (Introduction to exploration research on gas hydrates in Japan, Yoshihisa Okuda, Bulletin of the Geological Survey of Japan, 49(10), 494~500, 1998), although there is a light transmission intensity test device , but they used an ordinary light source as the test light source instead of an optical fiber light source. In addition, the system did not have scattering measurement means, let alone underwater micro-camera monitoring technology; A setup for light scattering studies of gas -hydrate formation kinetics, A.N.Nesterov and V.V.Feklistov, Instruments and Experimental Techniques, 42(2), 1999, 265~269) have a light scattering device, which can study the formation kinetics of hydrate, by measuring the turbidity of the experimental system , to determine the size and content of hydrate particles in different stages of hydrate formation, its principle is similar to that of a laser particle size analyzer, the design temperature of this device is -10~20°C, and the pressure is 7Mpa

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