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Method for removing benzene by adopting molecular sieve

A molecular sieve and benzene removal technology, applied in chemical instruments and methods, gas fuel, gas treatment, etc., can solve unfeasible problems, achieve single pore size distribution, improve utilization rate, and save costs

Inactive Publication Date: 2017-03-22
中石化石油工程技术服务有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from the theoretical analysis of adsorption, the molecular diameter of benzene is 5.85 angstroms, while the micropore diameter of the active surface of 5A molecular sieve is about 4.9 angstroms. not possible

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  • Method for removing benzene by adopting molecular sieve

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Embodiment Construction

[0026] The accompanying drawings disclose a specific embodiment of the present invention without limitation, and the present invention will be further described below in conjunction with the accompanying drawings.

[0027] As can be seen from the figure, a method for removing benzene by molecular sieves is provided with at least two molecular sieve adsorption towers in the method, comprising the following steps:

[0028] a. The benzene-containing natural gas system sends the benzene-containing natural gas through the pipeline to the top of the A molecular sieve adsorption tower for adsorption in the tower;

[0029] b. The natural gas that has been debenzene removed by adsorption is discharged from the bottom of the molecular sieve adsorption tower A, part of it is sent to the next process for treatment, and the other part is used as regeneration gas and enters the heater through the pipeline for heating;

[0030] c. The regeneration gas heated by the heater enters the bottom o...

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Abstract

The invention discloses a method for removing benzene by adopting a molecular sieve. The method comprises steps as follows: benzene-containing natural gas is sent to the top of a molecular sieve adsorption tower A through a pipeline and is adsorbed in the tower; the natural gas after adsorptive benzene removing is discharged from the bottom of the molecular sieve adsorption tower A, part of the natural gas is sent to a next procedure for treatment, and the other part is taken as regenerated gas to enter a heater through a pipeline to be heated; the regenerated gas heated by the heater enters the bottom of a molecular sieve adsorption tower B, and a molecular sieve in the molecular sieve adsorption tower B is heated and regenerated by the regenerated gas; the regenerated gas discharged from the top of the molecular sieve adsorption tower B is cooled by a cooler and separated by a separator and then returns to an inlet pipeline of the molecular sieve adsorption tower A for recovery. The molecular sieve adsorption tower A and the molecular sieve adsorption tower B are switched to realize circulating operation. The method for removing benzene is good in adsorption performance and wide in applicable range.

Description

technical field [0001] The invention relates to a method for using molecular sieves to remove benzene from natural gas. Background technique [0002] Liquefied Natural Gas (LNG for short), the main component is methane, recognized as the cleanest fossil energy on earth, colorless, odorless, non-toxic and non-corrosive, its volume is about 1 / 625, the quality of liquefied natural gas is only about 45% of the same volume of water. The production of LNG mainly includes purification process and liquefaction process. Since the liquefaction process is a low-temperature process, in order to avoid pipeline blockage due to benzene freezing at low temperature, debenzene removal of natural gas before liquefaction is one of the important parts of the purification process. [0003] The methods for removing benzene from natural gas include adsorption and absorption. The absorption method is to wash benzene with a solvent similar to benzene in chemical properties, and absorb the benzene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10B01D53/02
CPCC10L3/101B01D53/02B01D2253/106B01D2257/7027B01D2259/40088
Inventor 宋世昌孙娟银永明仝淑月李光陈清涛公明明王世宇王宁
Owner 中石化石油工程技术服务有限公司
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