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Method for removing benzene from natural gas

A technology for natural gas and debenzene removal, applied in the field of natural gas debenzene removal, can solve the problems of high investment, large consumption, complex process flow, etc., and achieve the effect of good debenzene removal effect and simplified process flow.

Active Publication Date: 2010-09-29
苏州制氧机股份有限公司 +1
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  • Abstract
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Problems solved by technology

The disadvantage of this method is that the technological process is complicated, the investment is high, and the consumption is large.

Method used

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  • Method for removing benzene from natural gas
  • Method for removing benzene from natural gas

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Embodiment Construction

[0024] The accompanying drawings disclose a specific embodiment of the present invention in a non-limiting manner, and the present invention will be further described below with reference to the accompanying drawings.

[0025] As can be seen from Fig. 1, a kind of method for debenzene from natural gas, at least two activated carbon adsorption towers are provided in the method for debenzene from natural gas, comprising the following steps:

[0026] A. High pressure or medium pressure benzene-containing natural gas system 6 sends benzene-containing natural gas into the top of A activated carbon adsorption tower 2 through pipeline for adsorption;

[0027] b. The adsorbed natural gas is discharged from the bottom of the A activated carbon adsorption tower 2, and a part is sent to the next process for processing 5, and the other part of the debenzene-removed natural gas enters the heater 3 through the pipeline as a regeneration gas for heating, and the heater 3 heats The temperatur...

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Abstract

The natural gas debenzolizing process includes the following steps: feeding benzene containing natural gas from high pressure system to the top of active carbon adsorption tower A for adsorption; discharging natural gas from the bottom of active carbon adsorption tower A, treating partial natural gas in the next step and heating the rest in a heater; feeding the heated natural gas to the bottom of active carbon adsorption tower B for inverse heating and regenerating; stopping heating active carbon adsorption tower B after the top outlet temperature reaches the set value 100-200 deg.c; and collecting the regenerated natural gas from the top outlet of active carbon adsorption tower B to a low pressure natural gas system. The natural gas debenzolizing process has simplicity, less investment and less consumption.

Description

technical field [0001] The invention relates to a method for removing benzene from natural gas. Background technique [0002] The process flow of a liquefied natural gas (LNG) plant is roughly divided into two parts, namely, the purification process and the liquefaction process. The purification process is the primary process of natural gas liquefaction. [0003] The purification of natural gas before liquefaction is mainly to remove harmful impurities in the raw gas and substances that may solidify during the cryogenic process. Benzene will freeze during the liquefaction of natural gas, causing ice blockage of pipelines and instrument valves, resulting in accidents. [0004] In the process of multi-stage refrigeration (such as MRC process, cascade refrigeration, etc.), benzene and other aromatics can be removed by separation through molecular sieve and pre-cooling. Some processes are realized by washing and distillation. [0005] For peak-shaving LNG plants, the feed ga...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10
Inventor 奚永龙张凤华李克锦张雪洪奚爱民龚小英林哲徐新红
Owner 苏州制氧机股份有限公司
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