Oxygen production system based on high-temperature oxygen permeation membranes

An oxygen production system and oxygen-permeable membrane technology, applied in the fields of oxygen production, oxygen/ozone/oxide/hydroxide, membrane technology, etc., can solve the problems of low efficiency, high power consumption, unenvironmental protection, etc., and reduce the thickness , the effect of improving oxygen production efficiency

Pending Publication Date: 2019-09-17
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These traditional methods have their own advantages and disadvantages. Usually, the equipment is large in size, high in power consumption, low in efficiency, and not environmentally friendly.

Method used

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  • Oxygen production system based on high-temperature oxygen permeation membranes
  • Oxygen production system based on high-temperature oxygen permeation membranes
  • Oxygen production system based on high-temperature oxygen permeation membranes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 2 As shown, the oxygen-generating system based on the high-temperature oxygen-permeable membrane includes the oxygen-permeable membrane group 4, and the oxygen-permeable membrane group is composed of several stacked oxygen-permeable membrane repeating units. Such as image 3 As shown, the ceramic oxygen-permeable membrane in the repeating unit of the oxygen-permeable membrane divides the cavity of the repeating unit into an oxygen-making side 5 and an air side 6; the air side is provided with an air inlet and a nitrogen gas outlet; the oxygen-making side An oxygen outlet is provided; the feature is: the oxygen production side is provided with a water vapor inlet, the oxygen outlet on the oxygen production side is connected to a condenser, and the condenser is provided with a condensed water drain and an oxygen outlet.

[0024] The oxygen permeable membrane is dense at high temperature, and can conduct oxygen ions to form directional migration. It can be...

Embodiment 2

[0030] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0031] This example is based on 50 pieces of 100*100cm LSCF oxygen-permeable membranes. The flow field adopts the counterflow method, the air side adopts the fully sealed method, and the repeating units are superimposed. The effective area of ​​a single sheet is 64cm 2 , the working temperature is 750°C, and the oxygen production can reach 2.5 L / min. At this time, it is a mixed conductor film, and the oxygen-permeable film is equivalent to the internal short circuit of the battery and does not consume electric energy. However, the gas circulation pump needs to consume externally provided electric energy. In the case of small-scale oxygen production in this embodiment, the energy consumption is about 1.2 kWh / m 3 Oxygen, higher than traditional air separation methods.

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PUM

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Abstract

The invention discloses an oxygen production system based on high-temperature oxygen permeation membranes. The oxygen production system comprises an oxygen permeation membrane group, wherein the oxygen permeation membrane group is formed by stacking a plurality of oxygen permeation membrane repeating units; the cavity of each repeating unit is divided into an air side and an oxygen production side by a ceramic oxygen permeation membrane in the oxygen permeation membrane repeating unit; each air side is provided with an air inlet and a nitrogen gas outlet; and each oxygen production side is provided with an oxygen gas outlet. Each oxygen production side is provided with a water vapor inlet, the oxygen gas outlet of each oxygen production side is connected with a condenser, and each condenser is provided with a condensate water outlet and an oxygen gas outlet. According to the invention, high-temperature water vapor is introduced into the oxygen production side of an oxygen-permeable membrane reactor, and the water vapor is used for balancing differential pressure between two sides of each high-temperature oxygen-permeable membrane and keeping the working temperature during oxygen production, so that the ceramic membranes are prevented from being damaged. The thickness of the oxygen permeation membranes can be reduced, and oxygen production efficiency is improved.

Description

technical field [0001] The invention relates to the separation technology and electrochemical field of oxygen in the air, in particular to an oxygen production system based on a high-temperature oxygen-permeable membrane. Background technique [0002] It is well known that the important use of pure oxygen is to supply respiration and support combustion or oxidation, and it is widely used in medical care, industrial smelting, chemical synthesis, pyrolysis and combustion enhancer in the field of national defense. At present, the more common oxygen production technologies include electrochemical oxygen production, such as patent Chinese patent documents ZL93115931.8, ZL99238206.8, ZL02158564.4, etc.; chemical reaction oxygen production, such as Chinese patent document ZL85109247; and physical oxygen production, such as patent The pressure swing adsorption method introduced in ZL00246155.2, and the method of compression and condensation separation introduced in Chinese patent do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22C01B13/02
CPCB01D53/22B01D53/228B01D2053/221B01D2256/12C01B13/0255
Inventor 王绍荣曾凡蓉张广君
Owner CHINA UNIV OF MINING & TECH
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