Ethylene glycol regeneration and recovery system in deep sea natural gas extraction process and ethylene glycol recovery method

Abstract

The invention discloses an ethylene glycol regeneration and recovery system in a deep sea natural gas extraction process. The ethylene glycol regeneration and recovery system comprises a pretreatmentdevice for removing light hydrocarbon and divalent salt ions in an ethylene glycol pregnant solution, a dehydration regeneration device for removing water in the ethylene glycol pregnant solution, anda desalting device for removing monovalent salt in a salt-containing ethylene glycol barren solution. According to the system, for the ethylene glycol pregnant solution obtained in the deep sea natural gas extraction process, separation of light hydrocarbon, divalent salt ions, water, high-solubility salt and other impurities in the ethylene glycol pregnant solution is achieved, the ethylene glycol barren solution capable of being reused is obtained, and the deep sea natural gas extraction cost is saved. The invention further discloses an ethylene glycol recovery method of the ethylene glycolregeneration and recovery system in the deep sea natural gas extraction process.

Description

technical field [0001] The invention relates to an ethylene glycol regeneration and recovery system and an ethylene glycol recovery method in the deep sea natural gas development process. Background technique [0002] During the development of deep-sea natural gas fields, as the water depth increases, hydrates are easily formed in the submarine pipeline under high-pressure transportation conditions, causing blockage of pipeline valves and other equipment, affecting the normal operation of production. Therefore, it is necessary to add hydrate inhibitors in the process of natural gas development to prevent the formation of hydrates, and the most commonly used inhibitor is ethylene glycol. [0003] Ethylene glycol is an important organic chemical raw material. For economic considerations, the ethylene glycol rich solution used as an inhibitor usually needs to be regenerated and recovered to remove excess water and impurities in order to reduce the cost of use. Ethylene glycol ...

AI Technical Summary

Problems solved by technology

The ethylene glycol used in deep sea natural gas exploitation absorbs part of the production fluid when it flows back from the pipeline, and usually contains a certain amount of salt, which is very easy to cause scaling and corrosion in the equipment, resulting in the failure of the entire process

However, the current conventional ethylene glycol regeneration recovery technology lacks the treatment of the above phenomenon, so the ethylene glycol recovery and regeneration system in the development of deep water oil and gas fields needs to be developed urgently

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