Method for preparing natural gas hydrate

Abstract

The invention relates to a method for preparing a natural gas hydrate, and belongs to the field of natural gas storage and transportation. A device comprises a process transformation control unit, a multi-section bubble reactor, an intermediate storage tank, a water tank, a refrigeration unit, a cold storage unit, a separating machine and a center control system; the device is composed of three sections; the lower section is a reaction section formed by a line tube and an outer cylinder, the gas and water flow and react in the line tube, and cold quantity is provided at a shell side to form a cold trap in a reaction tube so as to remove reaction heat; the intermediate section is a reaction mixture retention area; the upper section is a gas cap used for regulating the pressure inside the reactor; the refrigeration unit is provided with four loops; one loop is communicated with the reactor, one loop is communicated with the intermediate storage tank, one loop is communicated with the water tank, and one loop is communicated with the cold storage unit; the reactor is provided with a crystal regulator which is sued for regulating the retention time of a hydrate with the process transformation control unit together. According to the method disclosed by the invention, the hydrate obtained after separation is granulated through liquid nitrogen refrigeration to obtain hydrate solid granules. The device disclosed by the invention integrates the functions of hydrate reaction and separation, hydrate shape and retention time regulation and the like.

Description

technical field [0001] The invention relates to a method capable of producing natural gas hydrate continuously, stably and efficiently. It belongs to the field of natural gas storage and transportation, which can store and transport natural gas safely and conveniently. Background technique [0002] Natural gas is a kind of clean energy, which is conducive to environmental protection and sustainable development of the national economy. Natural gas accounts for 3% of my country's energy use, while it has reached 24% in foreign countries, and the future demand will show an increasing trend. [0003] Natural gas hydrate is a non-stoichiometric crystalline solid formed by natural gas and water. It has high energy density and is safe and economical to use. The use of natural gas in the storage and transportation of hydrates can realize the safe storage and transportation of natural gas and significantly reduce the cost of natural gas storage and transportation. my country's "Re...

AI Technical Summary

Problems solved by technology

[0005] 1. The accumulation speed of large-volume hydrate is slow, and the efficiency of hydrate preparation process is low

[0006] 2. The preparation and transportation devices of natural gas hydrate are relatively complicated

[0007] 3. The gas content of hydrate is low, resulting in poor economy

[0025] In summary, these technologies and patents all have common weaknesses, and cannot meet the four necessary conditions for improving the efficiency of hydrate formation at the same time, so they have not been industrialized

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