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United technique for preparing oxygen through negative pressure type membrane method/low pressure type deep cooting method

A process method, the technology of cryogenic method, applied in the field of oxygen preparation, can solve the problems that have not been retrieved, high energy consumption of oxygen production, etc., and achieve the effect of high degree of automation, low equipment investment and high purity

Inactive Publication Date: 2006-09-13
刘国存
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing high-pressure membrane separation method and high-pressure cryogenic oxygen production consume high energy consumption, so we adopt the oxygen production method combining negative pressure membrane separation oxygen production and low-pressure cryogenic separation oxygen production
At present, no relevant articles have been retrieved that combine negative pressure membrane separation oxygen production and low pressure cryogenic separation oxygen production

Method used

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Examples

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Embodiment Construction

[0007] The following examples further illustrate the present invention

[0008] Before cryogenic oxygen production, membrane separation method is used to increase the oxygen concentration in the air into oxygen-enriched air, and then cryogenic method is used to separate oxygen-enriched air to obtain oxygen. The membrane separation method adopts negative pressure membrane separation, namely The operation mode of the membrane separation device is negative pressure operation, and the cryogenic method adopts the low pressure operation mode. The membrane separation device is composed of a blower, a vacuum pump and a membrane module. It adopts the BV series industrial oxygen-enriched membrane device produced by Tianjin Shengpu Membrane Technology Co., Ltd. The operation mode is negative pressure work, and the pressure is 0.026Mpa (-560mmHg). Pressure is 0.1Mpa, power consumption is 0.112kwh / m 3 . The cryogenic air separation unit adopts the KDON-170 / 100-IV new oxygen generator produced ...

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Abstract

The present invention relates to a method for preparing oxygen gas, in the concrete, it is a negative pressure membrane method / low pressure cryogenic method combined process for preparing oxygen gas. Before the cryogenic method is used for making oxygen, firstly the membrane separation method is used for raising oxygen concentration in the air to obtain the oxygen-enriched air, then the cryogenic method is used to separate the oxygen-enriched air so as to obtain oxygen gas with high purity (oxygen content can be up to 99.7%).

Description

[0001] Involved in technical fields: [0002] The invention relates to an oxygen preparation method, in particular to a negative pressure membrane method / low pressure cryogenic method combined oxygen production process method. Background technique: [0003] Most of the existing oxygen production processes adopt the cryogenic separation method and the normal temperature pressure swing adsorption air separation method, and the purity of the produced oxygen is mostly below 99.2%, and the quality of the oxygen used does not meet the international oxygen standard. As the application of oxygen expands from medical to tourism, home, school, sports, mountain, deep sea, military industry and other fields, low-purity oxygen can no longer meet the needs of society. As a result, an oxygen production method combining membrane separation oxygen enrichment technology and cryogenic oxygen production technology has emerged, which improves the purity of oxygen. The existing high-pressure membrane se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/02
Inventor 刘国存陈慧莲徐柏如
Owner 刘国存