A method and device for exploiting seabed surface natural gas hydrate by using ultrasonic waves

Abstract

The invention relates to a method and a device for exploiting natural gas hydrate in the surface layer of the seabed by ultrasonic waves, which are used in the field of natural gas exploitation. It can improve mining efficiency, reduce mining cost, reduce energy consumption, and overcome the deficiencies of existing technologies. The technical solution is: the steps of the mining method are as follows: first turn on the power supply device on the working ship, the ultrasonic waves emitted by the ultrasonic generator are transmitted to the surface layer of the seabed through the transducer, ultrasonic concentrator, and crushing head, and the ultrasonic waves drive the crushing head to vibrate and hydrate the natural gas Then, the slurry pump is started, and the granular slurry is sucked into the natural gas hydrate decomposition equipment through the suction hole through the hose C, the adjustment arm, and the pipe column; finally, the decomposition equipment is started, and the natural gas hydrate is decomposed. , connect the natural gas collection with the user end, and discharge the separated water and sand into the seabed. The principle of the mining method is simple and practical, and it can be used for continuous mining conveniently; the mining device has a simple structure, less energy consumption, is easy to implement, and is used for natural gas mining.

Description

technical field [0001] The invention relates to a method and a device for exploiting natural gas hydrate in the surface layer of the seabed by ultrasonic waves, which are used in the field of natural gas exploitation. Background technique [0002] Natural gas hydrate is an ice-like solid compound formed by natural gas (mainly composed of methane) and water under high pressure and low temperature environment. The global natural gas hydrate resources are abundant, and it is a clean and high-quality energy, which occupies an important position in the future energy strategy. Technical statistics show that it can meet the needs of human beings for 1,000 years, and it is a non-renewable energy source with great development potential in the future. It will be the most important energy for mankind in the 21st century. Successful exploitation of gas hydrate can effectively solve the energy shortage problem in the future world. [0003] Gas hydrate is a metastable mineral that exis...

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Problems solved by technology

[0004] However, these methods have their own shortcomings in the mining process, such as low mining efficiency, most of them face problems such as complex instruments and equipment, expensive reagents, and high energy consumption.

And the above methods are only suitable for mineral deposits with a good non-decomposable covering layer on the hydrate upper layer, otherwise they are not feasible

However, some natural gas hydrates on the seabed are formed on the seabed surface, and the above methods are not suitable for the exploitation of natural gas hydrates on the seabed surface.

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