Hypergravity-process triglycol natural gas dehydration system and process using system

A technology of triethylene glycol and natural gas, which is applied in gas fuel, petroleum industry, fuel and other directions, can solve the problems of large loss of triethylene glycol, large area of ​​buffer tank, complicated process, etc., and achieves good absorption and mass transfer effect. Small footprint and high dehydration balance

Active Publication Date: 2014-12-10
BEIJING UNIV OF CHEM TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1. Due to the large fluctuations in offshore natural gas production, there is a large loss of triethylene glycol, and the dew point of water treatment is high; 2. The dehydration balance of the tower equipment is low, and it is difficult to meet the dew point requirements of the outlet gas; 3. The dehydration of the tower equipment triethylene glycol The system is relatively complicated; 4. The energy consumption of the regeneration process of triethylene glycol solution is relatively large; 5. The tower equipment occupies a large area, has low mass transfer efficiency and limited processing capacity, and its use on offshore platforms has great limitations. The large volume will increase the platform area, which will directly lead to a substantial increase in investment
[0004] At present, the published patented process of natural gas dehydration is difficult to solve the above-mentioned related problems
The oilfield natural gas dehydration device disclosed in Chinese patent 201210188626.0 adopts the adsorption tower process, which occupies a large area, has high equipment height, and low dehydration efficiency, so it is difficult to apply to offshore platforms
The natural gas

Method used

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  • Hypergravity-process triglycol natural gas dehydration system and process using system

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Experimental program
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Embodiment 1

[0030] The technical process of the dehydration of TEG natural gas by the supergravity method of the present invention mainly includes the absorption and regeneration process, and the main equipment is a gas-liquid separator, a filter separator, an absorption supergravity machine, a flash tank, a regeneration supergravity machine and The composition of the buffer tank mainly includes the process of absorption and regeneration. The absorption process adopts a conventional external circulation supergravity machine, the regeneration process adopts an external circulation or internal circulation supergravity machine, the absorbent uses triethylene glycol absorbent (TEG), the operating pressure is 0-10Mpa, the temperature is 15-250℃, and the supergravity level is 10 -500g. The operation steps are as follows: the water-containing natural gas enters from the gas phase inlet of the supergravity machine, and contacts and reacts with the poor absorbent liquid entering the supergravity mac...

Embodiment 2

[0037] Use the device and process of embodiment 1 to carry out natural gas dehydration:

[0038] Capacity: 10m 3 / h, pressure 0.1MPa, water content in raw gas 25g / m 3 , triethylene glycol TEG as absorbent (concentration of poor solution is over 99%), the amount of TEG in the absorption solution is 0.5m 3 / h, the speed of absorption supergravity machine is 600r / min. After using this process, the dew point of the exported natural gas is below -15°C, the dehydration balance is above 95%, the concentration of rich liquid is about 95%, and the concentration of lean liquid after regeneration can reach above 99%.

Embodiment 3

[0040] As shown in Example 2, other conditions remain unchanged, and the speed of the absorption supergravity machine is adjusted to 800r / min. After using this process, the dew point of the exported natural gas is below -17°C, the degree of dehydration balance is above 95%, and the concentration of the rich liquid About 95%, after regeneration, the concentration of barren solution can reach more than 99%.

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Abstract

The invention discloses a hypergravity-process triglycol natural gas dehydration system which is characterized in that the outlet of a filtering separator is connected with the side inlet of a first hypergravity machine; the upper outlet of the first hypergravity machine is connected with the inlet of a gas-liquid separator; the lower outlet of the hypergravity machine is connected with the inlet of a heat exchanger; the outlet of the heat exchanger is connected with the inlet of a buffer tank; the outlet of the buffer tank is connected with the upper inlet of a second hypergravity machine; the upper outlet of the second hypergravity machine is connected with the inlet of a flash evaporation tank; the outlet of the flash evaporation tank is connected with the inlet of a pump; the outlet of the pump is connected with the upper inlet of the first hypergravity machine. According to the system, the characteristics of the enhanced absorption reactions of the hypergravity machines are utilized and high efficiency of triglycol is combined; the system has the advantages of simple equipment structure, small occupied area, easiness for dehydration, good operating flexibility, high efficiency and the like, and is a novel technology for removing the moisture in natural gas of an offshore platform.

Description

technical field [0001] The invention relates to the technical field of petroleum gas treatment and processing. More specifically, it relates to a high-gravity triethylene glycol natural gas dehydration system and its technology. Background technique [0002] Natural gas usually contains water vapor when it leaves the reservoir. Water vapor easily forms hydrates when the pressure and temperature of natural gas change. The local accumulation of hydrates will limit the flow rate of natural gas in the pipeline, increase the pressure drop of the pipeline, and reduce the gas transmission volume. In severe cases, the pipeline will be blocked and the gas transmission will be interrupted. At the same time, the moisture in natural gas is also the main factor causing corrosion and damage to equipment, instruments and pipelines. The existence of water may cause hydrates to freeze and block when the temperature is low, making traces of water become ice particles and damage or breakdown ...

Claims

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Application Information

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IPC IPC(8): C10L3/10
Inventor 陈建峰梁作中赵宏罗勇初广文邹海魁
Owner BEIJING UNIV OF CHEM TECH
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