In-situ submarine natural gas hydrate exploiting device and method thereof

Abstract

The invention relates to an in-situ submarine natural gas hydrate exploiting device and a method thereof, and belongs to the technical field of exploitation of natural gas hydrates. The exploiting device comprises a solar and wind power generating system, a rotary telescopic water gun, an insulating pipeline, a conveying pipeline, a sleeve pipe, an ocean platform, a sea water pump, an electric heater, a CO2 liquid storing tank, a decomposition accelerator storing tank, a high-pressure pump, a pressure gauge, a filtering device, a water storing tank, a gas-liquid separator and a gas recovering device. A thermal activation method and a chemical reagent catalyzing method are utilized to trigger a decomposition reaction of the natural gas hydrate, and then the high-pressure CO2 jetting technology is utilized to enable the natural gas hydrate to be cut while a substitution reaction occurs. According to the invention, the natural gas hydrate is exploited by fully utilizing rich solar power and wind power in ocean areas, so that the effects of cleaning and environmental protection are realized; the thermal activation method and the chemical reagent catalyzing method are matched with the CO2 substitution method, and therefore the exploitation rate is improved, the dosage of a chemical reagent is reduced, the stability of submarine geology is protected effectively, and meanwhile the greenhouse gas is treated to a certain extent.

Description

technical field [0001] The invention relates to a mining technology of seabed natural gas hydrate, in particular to a technology using high-pressure liquid CO 2 The invention relates to a device and method for in-situ exploitation of seabed natural gas hydrate by means of jet displacement technology combined with heat intensification method and chemical reagent catalysis method, and belongs to the technical field of natural gas hydrate exploitation. Background technique [0002] Natural gas hydrate (combustible ice) is a stoichiometric clathrate crystal compound formed by natural gas reacting with water at a certain temperature and pressure. Gas molecules fill the lattice formed by water molecules. It is a new type of potential energy, mainly distributed in seabed sediments and land permafrost. According to the results of relevant literature research, the global natural gas hydrate resources are about 21×10 15 m 3 , which is twice the total amount of coal, oil and natural...

AI Technical Summary

Problems solved by technology

This method was first proposed by Japanese patent JP2008031413A, but the research on this method is still immature, and there is still a certain distance from actual mining and commercial operation.

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