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System device and process suitable for dehydration treatment of natural gas for liquefaction on offshore platforms

A technology for offshore platforms and system devices, which is applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems such as the gap in the dehydration treatment requirements of natural gas water dew point, and achieve the effect of improving gas-liquid mass transfer efficiency, low height, and reducing water pressure

Active Publication Date: 2019-12-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, the water dew point of natural gas that can be obtained by using this patented device for dehydration treatment is still far from the dehydration treatment requirements of natural gas for liquefaction

Method used

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  • System device and process suitable for dehydration treatment of natural gas for liquefaction on offshore platforms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Using the above-mentioned device and process for deep removal of water from natural gas with triethylene glycol:

[0077]The pressure of natural gas entering the system is 7MPa, the volume ratio of triethylene glycol lean liquid to natural gas raw material gas is 1:10000, the ratio of the amount of stripping agent to the amount of triethylene glycol rich liquid is 0.15:1, and the stripping agent is positive The temperature of the heptane and triethylene glycol condenser is 30°C, the supergravity level of the first supergravity machine is 200, the supergravity level of the second supergravity machine is 200, and the reboiler temperature is 200°C; under this process condition, After regeneration, the purity of triethylene glycol lean liquid reaches about 99.999wt%, and the water dew point of exported natural gas reaches below -104°C.

Embodiment 2

[0079] As described in Example 1, other conditions remain unchanged, the supergravity level of the first supergravity machine speed is adjusted to 100, after this process, the purity of triethylene glycol barren liquid after regeneration reaches about 99.999wt%, and the natural gas water dew point Reach below -100°C.

Embodiment 3

[0081] As described in Example 1, other conditions remain unchanged, the temperature of the TEG condenser is adjusted to 20°C, after this process, the purity of the TEG barren liquid after regeneration reaches about 99.999wt%, and the dew point of natural gas water reaches -107 below ℃.

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Abstract

The invention discloses a system device and a process suitable for dehydrating liquefied natural gas on a marine platform. The system device comprises a filtering separator, a first high-gravity machine, a triethylene glycol condenser, a poor / rich liquid heat exchanger, a booster pump, a buffering tank, a reboiler, a second high-gravity machine, a flash tank, a conveying pump, a first cutoff valve, a second cutoff valve, a third cutoff valve, a steam stripping agent condenser, a three-phase separator, a steam stripping agent dryer, a steam stripping agent storage tank, a steam stripping agentpump, a first flow meter, a second flow meter and a three-way valve. By adopting the system device, a high-gravity reactor is adopted for dehydration of natural gas and regeneration of triethylene glycol, so that the height and size of equipment can be reduced; the purity of regenerated triethylene glycol poor liquid can be increased to 99.999 percent by weight; when the triethylene glycol poor liquid is taken as an absorbent, the dew point of water at an outlet of natural gas subjected to water absorption treatment in an absorbing system can be lowered to -100 DEG C or less; and treatment requirement of the liquefied natural gas on space-limited occasions such as marine platform can be met.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas treatment and processing, in particular to a system device and process suitable for dehydration treatment of natural gas used for liquefaction on offshore platforms. Background technique [0002] Natural gas is a clean fuel with low combustion pollution and high calorific value, and it plays an increasingly important role in the modern energy structure. In the past decade or so, the degree of onshore oil and gas exploration has been relatively high, and the scale of discovered oil and gas fields has been small, and the contribution of new reserves to the growth of world oil and gas reserves has decreased. In contrast, the world's offshore oil and gas exploration and development has developed rapidly, and major discoveries have been made continuously. The discovered oil and gas fields are large in scale and high in productivity, and their oil and gas production accounts for an increasin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10
Inventor 张亮亮刘平曹少博陈建峰初广文邹海魁孙宝昌罗勇
Owner BEIJING UNIV OF CHEM TECH
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