Electrochemical ceramic membrane oxygen generating system with self-heating function

Abstract

The invention relates to an electrochemical ceramic membrane oxygen generating system with a self-heating function, aims at solving the problem that pure oxygen cannot be prepared on site in the priorart, and particularly relates to the electrochemical ceramic membrane oxygen generating system with the self-heating function, which comprises an electrochemical ceramic membrane oxygen generating module formed by combining a ceramic membrane assembly formed by stacking a plurality of self-heating electrochemical ceramic membranes and a thermal management system, a control module and the like. Anair inlet fan inputs fresh air; the air is preheated by a double-spiral heat exchanger, is heated to 800 DEG C and then is uniformly blown to the stacked ceramic membrane assembly through an air distributor; pure oxygen, high-purity oxygen and ultrapure oxygen are obtained on the inner surface of an anode through separation of the self-heating electrochemical ceramic membranes; oxygen is collected into an oxygen channel of a ceramic membrane stack through microtubes or slots in the self-heating electrochemical ceramic membranes, and is outputted for use by users; waste gases are cooled by thedouble-spiral heat exchanger and is exhausted to the outer part of a machine. The electrochemical ceramic membrane oxygen generating system has the advantage of capability of preparing the pure oxygen, the high-purity oxygen and the ultrapure oxygen on site.

Description

technical field [0001] The invention relates to an oxygen production system, in particular to an electrochemical ceramic membrane oxygen production system with self-heating function. Background technique [0002] At present, the industry mainly obtains oxygen by separating liquid air, membrane separation, molecular sieve oxygen production, and electrolysis of water. 1. Separation of liquid air method: pressurize the air at low temperature to turn the air into a liquid state, and then evaporate it. Since the boiling point of liquid nitrogen is -196°C, which is lower than that of liquid oxygen (-183°C), nitrogen gas first flows from the liquid state The air evaporates, leaving mostly liquid oxygen. The main components in air are oxygen and nitrogen. Using the different boiling points of oxygen and nitrogen to prepare oxygen from air is called air separation. Firstly, the air is pre-cooled and purified (removing a small amount of moisture in the air, carbon dioxide, acetylen...

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Problems solved by technology

[0003] The existing oxygen production technology produces low-purity oxygen. In some occasions that require high-purity oxygen and ultra-pure oxygen, complex purification devices are required, which cannot meet the oxygen needs of various industries at the same time: the separation of liquid air requires It can only be realized in an extremely low temperature environment, and the investment is large. It is only suitable for large-scale industrial gas separation processes. For small and medium-scale dispersed applications such as medical use, the oxygen produced by separating liquid air needs to be packaged, distributed and stored. The requirements are high, and it cannot be produced and used on the spot; the oxygen concentration of membrane separation products is low (less than 45%), and the scale is only suitable for small and medium-sized. At this stage, it is only suitable for oxygen concentrations such as eutrophic combustion and medical care. Fields with low requirements; the concentration of oxygen produced by adsorption method is lower than 96%, there are many moving parts, loud noise, and regular maintenance is required. With the increase of service life, the concentration and pressure will attenuate, the failure rate will increase, and the use cost will be high; oxygen produced by electrolysis of water , Obtaining a unit volume of oxygen consumes a lot of energy, and if the hydrogen produced is not handled properly, there is a risk of explosion

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