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Method and apparatus for purifying a gas stream

A gas flow and equipment technology, applied in lighting and heating equipment, chemical instruments and methods, gas treatment, etc., can solve problems such as compressor failure

Active Publication Date: 2016-05-04
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the intermediate compressor may fail

Method used

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  • Method and apparatus for purifying a gas stream

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Embodiment Construction

[0045] figure 1 An apparatus is shown for the separation of a stream 1 having carbon dioxide as one of the main components, which stream contains at least 50 mol%, or even at least 70 mol% carbon dioxide, and light impurities such as nitrogen and oxygen. This stream is compressed in compressor 2 and the compressed stream is cooled in heat exchanger 3 . After separation in separator tank 4 , the resulting liquid is expanded in valve 5 and then sent to the top of column 6 . In this column 6 liquid is separated to form overhead gas and bottom liquid 7 (liquid CO 2 ). The bottom liquid 7 is divided into 3 streams by a flow divider 8 . These 3 streams are expanded in valves 9, 10 and 11 at three different pressures. These 3 liquid streams evaporate in exchanger 3 . Two of these three streams are compressed in intermediate compressors 12 and 13 and these three streams, again at the same pressure, are brought together in mixer 14 . The mixed stream is introduced into a surge ta...

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Abstract

The invention relates to a method of compressing at least two gas streams by means of a single compressor that does not support fluctuations in flow rate and / or pressure above a critical percentage, said method being characterized in that at least one of said gas streams or are fed to the buffer space before being fed to the single compressor.

Description

technical field [0001] The invention relates to a method for compressing at least two gas streams in a single compressor and its use in a method for purifying a gas stream having carbon dioxide as one of the main components. Background technique [0002] process CO 2 One means of this involves purification by partial condensation of 2 Rich CO 2 flow. rich in CO 2 The gas stream is usually recovered at different pressures at the outlet of the purification unit. Thus, each stream recovered is compressed in an intermediate compressor to the pressure of the stream recovered at the highest pressure before being mixed with the other streams recovered for compression in the final compressor. The final compressor thus usually receives a stream formed from a mixture of several streams leaving the intermediate compressor. [0003] However, the intermediate compressor may fail. It is therefore necessary to ensure that a sudden loss of molecules at the inlet of the final compress...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B13/02F04B15/08B01D53/00F25J3/00F25J3/06
CPCB01D53/002B01D2257/504F04B13/02F04B15/08F04B2015/0818F25J2200/02F25J2200/70F25J2205/04F25J2210/70F25J2220/82F25J2230/24F25J2230/32F25J2230/80F25J2240/90F25J2245/02F25J2260/80F25J2270/02F25J2280/20F25J3/0266F25J2230/30Y02C20/40F25J2290/62F25J3/00B01D53/00
Inventor A·达德A·布里格利亚X·特拉维萨C·萨姆卢斯基
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE