Seabed natural gas hydrate collecting device

Abstract

The invention discloses a seabed natural gas collecting device for suspension buoyancy tank electric heating, and belongs to the technical field of natural gas collection. The device comprises a mother ship and a hollowed natural gas collecting cover; a natural gas storage device is arranged on the mother ship, and is connected to the top of the natural gas collecting cover through a gas extracting pipeline; the natural gas collecting cover is connected to the bottom of the mother ship through a water separation pipe; the gas extracting pipeline is arranged in the water separation pipe; anchoring systems are arranged around the bottom of the natural gas collecting cover; a pressure adjusting system is arranged at the bottom of the natural gas collecting cover; a propelling system is arranged on the outer wall of the natural gas collecting cover; a density adjusting system is arranged on the natural gas collecting cover; and a temperature adjusting system and a stirring system are arranged in the natural gas collecting cover. The device mainly solves the problem of incapability of forming emission and leakage of natural gas in the decomposition, collection and extraction process of natural gas hydrates on a seabed mud bed.

Description

technical field [0001] The invention relates to the technical field of natural gas collection, in particular to the seabed natural gas hydrate collection technology. Background technique [0002] Submarine natural gas hydrate is a crystal formed by the combination of methane gas and water molecules in the low-temperature and high-pressure environment of the seabed. It is a clean energy with huge reserves, and it is expected to replace oil and coal as the main energy source. Gas hydrates are widely distributed in seabed sediments, and have the characteristics of large reserves, weak cementation, and poor stability. Once the temperature and pressure conditions in the area change, it may cause a large amount of decomposition, gasification and free release of seabed gas hydrates. [0003] Since natural gas hydrate is mainly decomposed into methane gas and water, however, methane gas is a greenhouse gas, and a large amount of release into the atmosphere will cause the greenhouse ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a seabed natural gas hydrate collection device for the above-mentioned problems, which mainly solves the problem of natural gas hydrate in the seabed mud bed, and does not form the escape of natural gas during the process of decomposing, collecting and exploiting and leakage problems, the present invention breaks through the conventional thinking mode, cleverly uses pressure regulation to form negative pressure and temperature regulation system to increase the temperature, to promote the decomposition of natural gas hydrate in the seabed mud bed, which is beneficial to the exploitation of seabed natural gas hydrate, and then greatly improves the Improve the collection rate of natural gas and provide a new direction for the exploitation of seabed natural gas hydrate; it can be seen that the present invention can ensure stable production through the control of density, pressure and temperature.

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