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Device and method for four-tower dehydration and heavy hydrocarbon removal of natural gas

A natural gas and heavy hydrocarbon removal technology, applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems of long-term normal and stable operation of unfavorable devices, discontinuous operation of heating furnace, frequent ignition and shutdown of furnace, etc., to improve regeneration effect, simplification of operation, and effect of reducing energy consumption

Active Publication Date: 2014-09-17
CHENGDU SEPMEM SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of this method will lead to discontinuous operation of the heating furnace, frequent ignition and shutdown, which is not conducive to the long-term normal and stable operation of the device, and will also cause a certain amount of heat loss.
However, in the process of removing water and heavy hydrocarbons from natural gas in the three fixed-bed adsorption towers, it is also difficult to remove water below 1ppm.

Method used

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  • Device and method for four-tower dehydration and heavy hydrocarbon removal of natural gas
  • Device and method for four-tower dehydration and heavy hydrocarbon removal of natural gas

Examples

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Effect test

Embodiment 1

[0045] figure 1 It is a schematic diagram of the structure of the present invention, and this embodiment takes 6 hours of adsorption drying time as an example.

[0046] The device of this embodiment is shown in the figure.

[0047] The device comprises an inlet pipe 1, a coalescing filter 2 connected to the inlet pipe 1, a throttle valve 3, an air outlet pipe 4, a first fixed bed adsorption tower 5, a second fixed bed adsorption tower 6, and a third fixed bed adsorption tower 7. The fourth fixed bed adsorption tower 8, the first pipeline 9, the second pipeline 10, the third pipeline 11, the fourth pipeline 12, the fifth pipeline 13, the sixth pipeline 14, the seventh pipeline 15, the first heat exchanger 16. Second heat exchanger 17, third heat exchanger 18, fourth heat exchanger 19, fifth heat exchanger 20, first gas-liquid separator 21, second gas-liquid separator 22, tower one first Feed pipe 23, tower-second feed pipe 24, tower-third feed pipe 25, tower-fourth feed pipe ...

Embodiment 2

[0068] The first wet natural gas passing through the fourth pipeline 12 is heated to 200° C. after passing through the first heat exchanger 16 and the second heat exchanger 17 in sequence. The first wet natural gas in the sixth pipeline 14 also contains water and heavy hydrocarbons. The first wet natural gas passes through the first heat exchanger 16 and the third heat exchanger 18, and after being cooled to 25°C, it enters the first gas-liquid In the separator 21, the moisture in the first wet natural gas is removed. The first wet natural gas after dehydration passes through the fourth heat exchanger 19 and the fifth heat exchanger 20, and after being cooled to 5°C, enters the second gas-liquid separator 22 to remove the heavy hydrocarbons therein. Dry natural gas is obtained, and the removed heavy hydrocarbons are discharged.

[0069] Others are the same as in Example 1.

Embodiment 3

[0071] The first wet natural gas passing through the fourth pipeline 12 is heated to 300° C. after passing through the first heat exchanger 16 and the second heat exchanger 17 in sequence. The first wet natural gas in the sixth pipeline 14 also contains water and heavy hydrocarbons. After being cooled to 35°C through the first heat exchanger 16 and the third heat exchanger 18, the first wet natural gas enters the first gas-liquid In the separator 21, the moisture in the first wet natural gas is removed. The first wet natural gas after dehydration passes through the fourth heat exchanger 19 and the fifth heat exchanger 20, and after being cooled to 15°C, enters the second gas-liquid separator 22 to remove the heavy hydrocarbons therein. Dry natural gas is obtained, and the removed heavy hydrocarbons are discharged.

[0072] Others are the same as in Example 1.

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Abstract

The invention discloses a device and method for four-tower dehydration and heavy hydrocarbon removal of natural gas and aims at solving the problem that the adoption of two fixed-bed adsorption towers is likely to cause discontinuous operations and frequent ignition and shutdown of a heating furnace, disadvantageous for long-cycle normal and steady operation of the device and also liable to cause certain heat loss, and the problem that the adoption of three fixed-bed adsorption towers is difficult to remove moisture content below 1ppm in the process of removing water and heavy hydrocarbons in the natural gas by use of a solid adsorption method. The device comprises a gas inlet pipe, a coalescence filter connected with the gas inlet pipe, a throttling valve, a gas outlet pipe, a fixed bed adsorption tower, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger, a first gas-liquid separator and a second gas-liquid separator. The device and the method can be used for removing the moisture content and heavy hydrocarbon in wet natural gas, and is good in effect and high in energy utilization rate.

Description

technical field [0001] The invention relates to the field of chemical industry, especially the field of natural gas dehydration and heavy hydrocarbon removal, and specifically relates to a four-tower dehydration and heavy hydrocarbon removal device for natural gas and a method thereof. Background technique [0002] Wet natural gas usually contains some water and heavy hydrocarbons, which will precipitate as the temperature drops during the transportation process, seriously affecting the transportation capacity of the pipeline; in severe cases, it will block the pipeline and accelerate the corrosion of the pipeline. At present, the dehydration and dehydrocarbonation of wet natural gas are widely used at home and abroad, and there are mainly three methods with relatively mature technologies: low-temperature separation method, solid adsorption method and solvent absorption method. Among them, the technology of removing water and heavy hydrocarbons from natural gas by solid adso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
Inventor 张惊涛王子寒
Owner CHENGDU SEPMEM SCI & TECH
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