Methane hydrate collecting device for shallow stratum

Abstract

The invention discloses a methane hydrate collecting device for a shallow stratum. The device comprises a gas pumping tube and a central rod; a moving block is fixed to the tail end of the central rod; a plurality of heating tubes which are connected in parallel are fixed on the outer wall of the moving block. The device further comprises a collecting cover with an arc-shaped cross section; an annular groove is formed in the outer wall of the gas pumping tube; a plurality of balls are mounted on the inner wall of a through hole; the upper side and the lower side of the collecting cover are respectively connected with the inner walls of two sides of the annular groove through elastic rubber rings; a reflecting plate is mounted on the inner wall of the collecting cover; the thickness of the reflecting plate is gradually increased from the center to two ends; a plurality of reflecting bulges with triangular longitudinal sections are arranged on the inner wall of the reflecting plate. According to the device, combustible ice can be decomposed by grades through the collecting cover and the moving block, so that the heat of the combustible ice can be slowly diffused, the combustible ice cannot be overflowed due to excessively fast decomposing while continuously pumping methane through the gas pumping tube, the influence of production of combustible ice on the environment can be avoided, and as a result, the purposes of increasing the production rate and improving the safety and reliability can be achieved.

Description

technical field [0001] The invention relates to the field of combustible ice mining, in particular to a methane hydrate collector used in shallow layers. Background technique [0002] Methane hydrate, also known as "combustible ice", is a cage crystal formed by methane gas and water molecules. By separating the two, ordinary natural gas can be obtained. This ice-like substance is formed under high pressure and low temperature conditions, which means that it is usually found in the sea floor of the continental shelf and the permafrost zone at the Earth's poles. [0003] At present, it is estimated that the world's combustible ice reserves are 3 times 10 to the 16th power, which is equivalent to twice the total proven natural gas reserves. Therefore, if combustible ice resources are widely used, it will greatly alleviate the situation of resource shortage in the future. However, if the "combustible ice" leaks during mining, a large amount of methane gas will decompose and ent...

AI Technical Summary

Problems solved by technology

However, if the "combustible ice" leaks during mining, a large amount of methane gas will decompose and enter the atmosphere through seawater. The greenhouse effect of methane is 21 times greater than that of carbon dioxide. Therefore, once this leakage is not controlled, the global greenhouse effect will increase rapidly. After the atmosphere warms up, the seawater temperature will also rise, and the formation temperature will rise, which will cause the automatic decomposition of the "combustible ice" on the seabed, causing a vicious circle

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