A method and device for exploiting natural gas hydrate in the surface layer of the seabed

Abstract

The invention relates to a method for exploiting seabed surface natural gas hydrate and an exploiting device thereof, which are used in the field of natural gas exploitation. It overcomes the problems of expensive reagents, complex instruments and equipment, large energy consumption for lifting and complex three-phase flow involved in the current mining. Its technical plan: first start the development device on the mining vehicle to drive the cutting head to cut the natural gas hydrate on the surface of the seabed; then suck the natural gas hydrate slurry into the particle refinement device through the delivery pipe B, and then use the slurry pump to pump it into the right transfer chamber ;Start the control center, the solid-flow gas three-phase hydrate enters the right heating chamber, trigger sensor B to start, the microwave tube is heated, the natural gas hydrate decomposes, and the natural gas is collected by the gas collecting device on the working ship through the gas pipeline; The pipe discharges into the seabed. The mining method is simple in principle and practical, and can conveniently realize the continuous mining of natural gas hydrate; the mining device has a simple structure and low energy consumption, and is used for seabed natural gas hydrate mining.

Description

technical field [0001] The invention relates to a method for exploiting seabed surface natural gas hydrate and an exploiting device thereof, which are used in the field of natural gas exploitation. Background technique [0002] Natural gas hydrate is a white crystalline solid substance formed by water and gas molecules (mainly methane) under low temperature and high pressure conditions. 1m 3 The energy stored in natural gas hydrate is equivalent to 164m 3 Calorific value of natural gas. Gas hydrates are mainly distributed in terrestrial permafrost and deep sea areas. The reserves of gas hydrates in deep sea areas are about 100 times that of land and twice that of other fossil fuel reserves in the world. Therefore, gas hydrate is considered to be the most promising, new and clean alternative energy source in the future. [0003] At present, there are many ways to exploit natural gas hydrates. The first type is to decompose them by changing their physical and chemical prop...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in order to overcome the problems of expensive reagents, complex instruments and equipment, and the need to consume a lot of energy for lifting, and the process of lifting hydrates involves complex three-phase flow in the current mining, a kind of natural gas hydrate on the seabed surface is proposed. Mining method and mining device thereof

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