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Double separation method and double separation system for oxygen gas and nitrogen gas

A separation method, gas separation technology, applied in separation methods, nitrogen purification/separation, chemical instruments and methods, etc.

Active Publication Date: 2009-09-09
SUMITOMO SEIKA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The longer the above-mentioned cut-off time, the larger the amount of excess desorbed gas stored in the storage tank 83 in advance, so the required volume of the storage tank 83 is also larger, and the size of the storage tank 83 is increased.

Method used

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  • Double separation method and double separation system for oxygen gas and nitrogen gas
  • Double separation method and double separation system for oxygen gas and nitrogen gas
  • Double separation method and double separation system for oxygen gas and nitrogen gas

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Embodiment Construction

[0031] figure 1 An oxygen-nitrogen parallel separation system X1 according to the first embodiment of the present invention is shown. The oxygen-nitrogen parallel separation system X1 includes a pressure swing adsorption (PSA) gas separation device 1, a membrane gas separator 2, a raw gas supply device 3, pumps 4 and 5, a silencer (silencer) 6, a compressor 7, a gas-liquid The separator 8, the oxygen concentration control mechanism 9, and the piping connected to the above-mentioned devices form a parallel separation of oxygen-enriched gas and nitrogen-enriched gas from air (raw material gas containing oxygen-nitrogen), and implement gas separation including pressure swing adsorption Process, compression process, and the structure of the oxygen-nitrogen parallel separation method of the membrane gas separation process.

[0032] The PSA gas separation device 1 is equipped with at least one adsorption tower (not shown) filled with an adsorbent mainly used for preferentially ads...

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Abstract

The object of the present invention is to provide a device that can not only separate and obtain high-purity oxygen from air etc. by using a PSA gas separation device, but also continuously and efficiently separate and obtain high-purity nitrogen from the desorption gas continuously supplied by the PSA gas separation device. methods and systems. The invention comprises a PSA gas separation process implemented by a PSA gas separation device (1) and a membrane gas separation process implemented by a membrane gas separator (2). In the PSA gas separation process, oxygen-enriched gas and mainly nitrogen-containing but also Oxygen-containing desorbed gas. In the membrane gas separation process, the permeate side of the gas separation membrane (2A), which preferentially permeates oxygen, is depressurized to a pressure lower than atmospheric pressure, and the desorbed gas is separated into permeate gas by the gas separation membrane (2A). Gas permeated by the gas separation membrane (2A) and non-permeated gas (nitrogen-enriched gas) not permeated by the gas separation membrane (2A).

Description

technical field [0001] The present invention relates to a method and system for the parallel separation of oxygen and nitrogen from a gas mixture containing oxygen and nitrogen, such as air. Background technique [0002] Oxygen and nitrogen obtained from air separation can be used for various purposes. For example, oxygen can be used for high-temperature treatment in garbage melting furnaces, ash melting furnaces, glass melting furnaces, etc., for improving the combustion efficiency of steelmaking electric furnaces, for oxidation reactions in chemical plants, and for pure oxygen aeration in wastewater treatment plants. )Wait. On the other hand, nitrogen can be used, for example, for gas sealing and purification of garbage melting furnaces and chemical equipment, atmosphere adjustment of heat treatment furnaces, and gas sealing for food packaging. [0003] It is known that one of the practical methods for separating oxygen and nitrogen from air is pressure swing adsorption ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04B01D53/22C01B13/02C01B21/04
CPCB01D2257/102C01B21/045B01D2256/12B01D2259/40001C01B13/0251C01B13/0259B01D2256/10C01B2210/0046B01D53/229B01D53/047C01B21/0438B01D53/04B01D53/22C01B13/02C01B21/04
Inventor 春名一生笹野广昭
Owner SUMITOMO SEIKA CHEM CO LTD
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