Novel development device and method for natural gas hydrate

Abstract

The invention provides a novel development device and method for natural gas hydrate. The novel development device comprises a power plant high-temperature water vapor injection pipeline, a heat exchange device, a low-temperature return water return pipeline, a CO2 injection pipeline and a CH4 air exhaust pipeline, wherein the heat exchange device is arranged in a natural gas hydrate reservoir; the power plant high-temperature water vapor injection pipeline is connected with a water inlet of the heat exchange device, a water outlet of the heat exchange device is connected with one end of the low-temperature return water return pipeline, and the other end of the low-temperature return water return pipeline extends out of a seawater layer and is arranged at the ground end; one end of the CO2injection pipeline is connected with a CO2 storage tank, and the other end of the CO2 injection pipeline extends into the bottom of the natural gas hydrate reservoir; one end of the CH4 air exhaust pipeline is arranged at the top of the natural gas hydrate reservoir, and the other end of the CH4 air exhaust pipeline is connected with a CH4 storage tank; and the CO2 injection pipeline and the CH4air exhaust pipeline are arranged in an inner cavity of the heat exchange device. According to the system, effective cooling of tail water / tail gas of a power plant and CO2 emission reduction are realized, the exploitation efficiency of the natural gas hydrate at the seabed is improved, and long-acting stability and win-win development of an energy supply system are guaranteed.

Description

technical field [0001] The invention relates to the technical field of exploration and development of natural gas hydrates, in particular to a novel development device and method for natural gas hydrates. Background technique [0002] Natural gas hydrate is natural gas (CH 4 ) and water in a high-pressure, low-temperature environment as an ice-cage-like solid compound, mainly distributed in polar regions, plateaus and other tundra environments and underwater formation environments such as deep seas and deep waters. Because its combustion has less impact on the environment, it is a new type of efficient and clean energy, and it has huge resource potential to replace traditional fuels. Therefore, it has been favored by various countries and major energy companies in recent years. Although the depressurization method, thermal stimulation method, inhibitor method, CO 2 There are a series of natural gas hydrate recovery methods such as replacement method and solid recovery meth...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of natural gas hydrate development device and method, which solves the defects of high cost and low efficiency in the prior art for the exploitation of natural gas hydrate; at the same time, the circulating water and tail water produced by thermal power plants There is a problem of waste of resources with the heat energy of the flue gas

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