Seabed natural gas collection device and method heated by hot water circulation pipeline of suspended floating tank

Abstract

The invention discloses a seabed natural gas collecting device and a method for suspension buoyancy tank hot water circulation pipe heating, and belongs to the technical field of natural gas collection. A natural gas storage device is arranged on a mother ship, and is connected to the top of a 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; multiple lifting rings are arranged on the external of the natural gas collecting cover; a density adjusting system is connected to the lifting rings through cables; 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 field of natural gas acquisition technology, in particular to submarine natural gas hydrate acquisition 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 kind of clean energy with huge reserves, and it is promising to replace petroleum and coal as the main energy source. Natural gas hydrates are widely distributed in submarine 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 submarine natural gas hydrates. [0003] Since natural gas hydrate is mainly decomposed into methane gas and water, methane gas is a greenhouse gas, and a large amount of methane gas released into the atm...

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Problems solved by technology

[0006] The purpose of the present invention is to: aim at the above-mentioned problems, provide a seabed natural gas collection device and method for heating the hot water circulation pipeline of the suspended floating tank, which mainly solves the problem of natural gas hydrate in the seabed mud bed, which is decomposed, collected and exploited. During the process, the problem of natural gas escape and leakage will not be formed. The present invention breaks through the conventional thinking mode and skillfully uses pressure regulation to form a 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 improve the collection rate of natural gas, 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, and the natural gas collection is convenient, High collection efficiency, can be reused many times

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