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Pressure variation adsorption separation method

A technology of adsorption separation and pressure, which is applied in the direction of separation methods, dispersed particle separation, chemical instruments and methods, etc.

Inactive Publication Date: 2005-05-11
NIPPON SANSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, in the large-scale oxygen PSA in recent years, since atmospheric pressure adsorption and vacuum regeneration are performed, that is, the so-called VSA process is used, the pressure of the product oxygen at the outlet of the adsorption cylinder is approximately atmospheric pressure, so that the oxygen taken out from the adsorption cylinder can be supplied at the pressure desired by the user. , a compressor must be installed in the product gas supply pipeline

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Embodiment Construction

[0045] Next, the method of the present invention will be described in more detail with reference to the accompanying drawings.

[0046] Fig. 1 is a system diagram representing an example of a pressure swing adsorption separation device used in an embodiment of the method of the present invention, which uses air as a raw material to separate oxygen and nitrogen; oxygen PSA that is charged as a product.

[0047] First of all, PSA device 11, structurally speaking, it is a 3-tube PSA device with 3 base adsorption cylinders A, B, and C, and the three adsorption cylinders are filled with zeolite that preferentially adsorbs nitrogen as an adsorbent. This PSA device is provided with the above-mentioned three adsorption cylinders A, B, and C; a low-pressure blower 12 that raises the pressure of the air used as raw material to a predetermined pressure and supplies it to the above-mentioned adsorption cylinder; and vacuum exhausts the inside of the above-mentioned adsorption cylinder. Va...

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Abstract

The pressure fluctuation absorption separation method makes the mixed gas pass through a plurality of adsorption cartridges equipped with adsorbents to sequentially perform the conversion operations of adsorption, pressure equalization, decompression regeneration, purification regeneration, pressure equalization and pressurization, so as to absorb easily adsorbed components. When left on the adsorbent, the difficult-to-adsorb components are separated and compressed into product gas. By adjusting the opening of the flow control valve in the circulation path connecting the discharge port and the suction port of the compressor, the supply volume of the product gas reaches the changed set value; at the same time, the regulating valve of the product gas supply is adjusted to match the The opening corresponding to the pre-set gas flow conditions. In addition, decrement / increment operation can be performed by inputting a decrement or increment signal.

Description

[0001] The original application number of this divisional application is 95109999.X, and its application date is December 27, 1995. The original invention title is "pressure fluctuation adsorption separation method". technical field [0002] The present invention relates to a pressure fluctuation adsorption separation method, for example, using air as a raw material gas, using a plurality of adsorption cartridges filled with adsorbents that preferentially adsorb nitrogen, and using oxygen as a product of difficult-to-breath gas components to separate the pressure Change the adsorption separation method. Background technique [0003] The pressure swing adsorption separation method (hereinafter referred to as the PSA method) using zeolite as an adsorbent to separate nitrogen and oxygen in the air to produce oxygen as a product has been widely used. The oxygen production device (oxygen PSA) using this PSA method is basically a sequential conversion of a plurality of adsorption ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/047
CPCB01D53/0476B01D2253/108B01D2253/25B01D2256/12B01D2257/102B01D2259/40003B01D2259/40007B01D2259/40015B01D2259/40024B01D2259/40037B01D2259/40071B01D2259/403
Inventor 金子辉二池田贤治川井雅人獭越和人林伸工藤谦次
Owner NIPPON SANSO CORP