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Natural gas triglycol dehydrating process

A technology of natural gas and triethylene glycol, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of increased consumption of triethylene glycol, reduced dew point drop, and lower dew point of raw material gas, and achieves low operating costs, Small pressure drop, simple and reliable pipe layout

Inactive Publication Date: 2019-02-05
何瑛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the second heat exchanger is used to exchange heat between the natural gas exiting the TEG absorption tower and the raw natural gas before entering the TEG absorption tower, the dew point of the raw material gas will decrease, thereby reducing the dew point drop. , the consumption of triethylene glycol will also increase

Method used

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  • Natural gas triglycol dehydrating process

Examples

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Effect test

Embodiment 1

[0031] Such as figure 1 Shown, a kind of natural gas triethylene glycol dehydration process, concrete process steps are as follows:

[0032] 1) Pre-purification: natural gas raw material gas is pre-purified natural gas after the separator removes free water, liquid hydrocarbons and solid impurities;

[0033] 2) drying: the pre-purified natural gas obtained in step 1) is introduced into the bottom of the absorption tower, and made to contact with the triethylene glycol solution flowing down through each layer of trays in countercurrent, so that the water vapor in the pre-purified natural gas is absorbed by the triethylene glycol solution Absorption, forming a glycol-rich solution, which flows out from the lower side of the absorption tower, and the pre-purified natural gas without water vapor flows out from the top of the tower;

[0034] 3) Cooling: Pass step 2) the glycol-rich liquid through a gas / lean glycol heat exchanger to cool it down;

[0035] 4) Impurity removal: Step...

Embodiment 2

[0040] As shown in Example 1, other conditions remain unchanged, so that the glycol-rich solution cooled in step (4) first passes through the filter instead of the glycol pump, and directly enters the regeneration tower top reflux condenser. After being treated by this process, the dew point of the exported natural gas is below -14°C, the dehydration balance is above 96%, and the concentration of the glycol-poor concentrated solution after regeneration can reach above 97%.

Embodiment 3

[0042] As shown in Example 2, other conditions remain unchanged, so that the glycol-rich solution cooled in step (4) first passes through the glycol pump instead of the filter, and directly enters the regeneration tower top reflux condenser. After being treated by this process, the dew point of the exported natural gas is below -13°C, the dehydration balance is above 94%, and the concentration of the glycol-poor concentrated solution after regeneration can reach above 96%.

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Abstract

The invention discloses a natural gas triglycol dehydrating process, and belongs to the field of natural gas chemical industry. The process comprises the following steps: pre-purifying, drying, cooling, removing impurities, rectifying and concentrating. The natural gas triglycol dehydrating process has the beneficial effects that the natural gas dehydrating effect is good, triglycol consumption issmall, triglycol regenerating efficiency is high, evaporation loss is less, and investment and operation cost is low.

Description

technical field [0001] The invention relates to the field of natural gas chemical industry, in particular to a natural gas triethylene glycol dehydration process. Background technique [0002] Triethylene glycol is a colorless, odorless, sweet viscous, transparent or slightly yellow liquid, with a relative density of 1.126, a boiling point of 285°C, a melting point of -7°C, flammable, a flash point of 176.7°C, and spontaneous combustion The point is 371°C, it can be miscible with water in any proportion, can lower the freezing point of water, and has great hygroscopicity. Triethylene glycol can be used as a solvent for the extraction of aromatics, a solvent for rubber and nitrocellulose, as well as a diesel additive and rocket fuel. In addition, it is widely used in medicine, paint, textile, printing and dyeing, food, paper making, cosmetics, leather making, photography, printing, metal processing and other industries. It is often used as textile auxiliaries, solvents, pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
CPCC10L3/106C10L2290/541
Inventor 何瑛
Owner 何瑛
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