High-pressure cooling stage device for in-situ observation of particle size distribution of gas hydrate and application method

Abstract

The invention discloses a high-pressure cooling stage device for in-situ observation of particle size distribution of a gas hydrate. The device cooperates with a laser particle size analyzer to finish measurement of the particle size and particle size distribution of a gas hydrate crystal in fluid; the device comprises a high-pressure resistant perspective bin, a high-pressure resistant reaction bin, a temperature control system, a pressure control system and a computer data acquisition system. The device disclosed by the invention is adopted as an accessory device of the laser particle size analyzer, the application and measurement condition range of an existing laser particle size analyzer is expanded, so that the device can measure the particle size and particle size distribution of solid-liquid two-phase fluid in a high-pressure and low-temperature environment. The measurement method is simple, and the measurement precision is far higher than that of similar experimental devices developed by other countries. The device disclosed by the invention plays an important guiding role in quantitatively analyzing the processes such as generation and decomposition of the gas hydrate and revealing related dynamics mechanism of the gas hydrate.

Description

Technical field: [0001] The invention relates to the technical field of hydrate particle size characterization, in particular to a high-pressure cooling table device for in-situ observation of gas hydrate particle size distribution and a use method. Background technique: [0002] Gas hydrate is a mixture of ice-like substances formed by gas molecules and water molecules under low temperature and high pressure conditions. Naturally formed gas hydrates are widely distributed in the sediment layer of the shallow sea continental shelf and the plateau frozen soil layer. In recent years, with a large number of discoveries of natural gas hydrate on a global scale, it has become an alternative energy source with great development potential and has attracted the attention of countries all over the world. At present, the proven reserves of natural gas hydrate on a global scale have reached 2.1×10 15 m 3 , Is more than twice the total amount of traditional fossil energy. At the same time,...

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Problems solved by technology

The above methods cannot truly simulate the actual high-pressure reaction process of hydrates, and there are large errors or the equipment needs to be greatly improved, which requires high costs

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