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

A technology for developing processes and recovery systems, applied in combustion methods, separation methods, chemical instruments and methods, etc., can solve problems such as equipment scaling and corrosion, processes that cannot work properly, and lack, and achieve the effect of avoiding environmental pollution

Pending Publication Date: 2021-01-29
CHONGQING QIANWEI SCI & TECH GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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 th

Method used

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

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Embodiment Construction

[0040] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] Such as figure 1 As shown, the ethylene glycol regeneration and recovery system in the deep-sea natural gas development process includes a pretreatment device responsible for removing light hydrocarbons and divalent salt ions in the ethylene glycol-rich liquid. Reclaimed water dehydration regeneration device 2 and desalination device 3 responsible for removing monovalent salt in the salt-containing ethylene glycol barren solution,

[0042] The pretreatment device 1 comprises the MEG tank 101 that stores the rich ethylene glycol solution from the upstream pipeline or facility, and the MEG tank 101 is connected with the flash tank preheater 103 through the first transfer pump 102 and the pipeline, and the flash tank preheater 103 is directly connected to the flash tank 104 through pipelines, and the flash tank 104 is provided with a connec...

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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 ...

Claims

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Application Information

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IPC IPC(8): B01D3/06F23G7/06B01D35/02C07C29/76C07C29/88C07C29/80
CPCB01D3/06B01D35/02C07C29/76C07C29/80C07C29/88F23G7/06C07C31/202Y02A20/124
Inventor 李华罗祥军刘杰徽韩斌何佳伟陈晨王文涛齐继阳唐文献
Owner CHONGQING QIANWEI SCI & TECH GRP
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