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Method and device for solid phase separation of mixed gas by using hydrate method

A technology that applies hydration and hydration separation. It is applied in the direction of separation methods, dispersed particle separation, chemical instruments and methods, etc. It can solve the problems of poor separation effect, hindering the promotion of hydrate separation technology, and difficult continuous separation, so as to reduce the energy consumption of the device. , Improve the hydration separation efficiency, the effect of high hydration separation efficiency

Active Publication Date: 2010-05-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] At present, the hydrate separation technology is gas-liquid reaction. The installation and operation of the gas-liquid separator is not as convenient as that of the fixed hydrate separation device, and the separation effect is poor, and it is difficult to achieve continuous separation, which hinders the promotion of hydrate separation technology.

Method used

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  • Method and device for solid phase separation of mixed gas by using hydrate method
  • Method and device for solid phase separation of mixed gas by using hydrate method
  • Method and device for solid phase separation of mixed gas by using hydrate method

Examples

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Embodiment 1

[0038] This embodiment is an immobilized hydration separation process for desulfurization and decarbonization of natural gas.

[0039] The gas mixture consists of CO 2 20%, H 2 S concentration is 3500ppm, methane is 65%, and other hydrocarbons are 15%. Natural gas is exported from a natural gas well with a pressure of 15MPa and a temperature of 125°C.

[0040] The device of the present invention comprises an immobilized hydration separation tower 1, an immobilized hydration separation tower 2, a vacuum pump 5, a cooler 6 and a storage tank 7; the cooler 6 is respectively connected to the inlet of each immobilized hydration separation tower through pipelines, The outlet of the hydration separation tower is connected with the storage tank 7 and the vacuum pump 5 through pipelines.

[0041] The trays of the immobilized hydration separation tower 1 are coated with polyacrylamide (polymer hydrogel) with a water content of 65%wt, and tetrabutylammonium bromide is used as a high-eff...

Embodiment 2

[0045] This embodiment is a coal-fired power plant tail gas CO 2 Captured immobilized hydration separation process.

[0046] Raw gas composition is N 2 (71%) and CO 2 (29%) mixed gas. Four immobilized hydration separation towers are connected in parallel, and the polymer hydrogel coated on the trays is polyacrylamide with a water content of 85%wt, and tetrabutylammonium bromide (TBAB) is used as a high-efficiency hydrate accelerator.

[0047] The device of the present invention comprises an immobilized hydration separation tower 1, an immobilized hydration separation tower 2, an immobilized hydration separation tower 3, an immobilized hydration separation tower 4, a vacuum pump 5, a cooler 6 and a storage tank 7; It is connected with the inlet of each immobilized hydration separation tower, and the outlet of the immobilized hydration separation tower is connected with the storage tank 7 and the vacuum pump 5 through pipelines.

[0048] After the mixed gas is cooled to 20°C...

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Abstract

The invention discloses a method and a device for solid phase separation of a mixed gas by using a hydrate method. The device of the process comprises at least two fixed hydrate separating columns; the mixed gas enters the immobilized hydrate separating columns; in a fixed hydrate reaction layer, the gas which is easy to be hydrated in the mixed gas is hydrated, and the gas is difficult to be hydrated penetrates through a reaction zone and flows out from the top of the separation column; when the gas pressure at an outlet of the fixed hydrate separating column is lower than the set pressure of a back pressure valve, the introduction of the mixed gas is stopped, and the hydration is ended at that moment; and the mixed gas is switched to the next group of the fixed hydrate separating columns to perform hydrate separation, and simultaneously the fixed hydrate separating columns after hydration reaction undergo inverse hydration reaction, and the gas which is easy to be hydrated enters a storage tank so that the mixed gas is separated. The device and the method not only can improve the hydrate separation efficiency, but also can achieve continuous separations easily.

Description

technical field [0001] The invention relates to the technical field of gas separation by hydrate method, in particular to a method and device for solid-phase separation of mixed gas using hydration method. Background technique [0002] Hydrate is a non-stoichiometric cage substance formed by water and guest molecules under certain pressure and temperature. Methane, ethane, propane, hydrogen, oxygen, nitrogen, carbon dioxide, hydrogen sulfide and many other gases can form hydrates with water. The research on gas hydrate is one of the hot research at home and abroad. [0003] The hydrate formation pressures of different gas components vary greatly. For example, at 0°C, the pressure of methane hydrate formation is as high as 2.56MPa, while propane can form hydrates at normal pressure, so it is very easy to make hydrates by forming hydrates. Some gas components are separated. The degree of difficulty in forming hydrates and the gas that is difficult to hydrate and the gas tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/82B01D53/62B01D53/52
Inventor 王燕鸿樊栓狮郎雪梅陈玉娟
Owner SOUTH CHINA UNIV OF TECH
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