Comparison of the economic efficiency of membrane oxygen generation and adsorption oxygen generation

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A comparison of the economic efficiency of membrane oxygen generation and adsorption oxygen generation. The principle behind membrane oxygen generation is based on the different permeation rates of various components in air as they pass through an oxygen-enriching membrane; the permeation rate ratio of nitrogen to oxygen in air is between 2.1 and 2.3 times. Driven by a pressure difference, oxygen in the air passes through first, resulting in oxygen-enriched air. Application areas: Boiler series: Industrial coal-fired boilers, gas boilers, oil-fired boilers ； Waste incinerator. Furnace series: glass furnaces, cement kilns, ceramic kilns ； Metal smelting furnaces, as well as fuel and gas generator sets, etc. Due to the increasing scarcity of energy and stricter environmental regulations, it is believed that the use of membrane-based oxygen-enriching combustion assistance technology will become more widespread in the near future, with very promising prospects for development. Introduction to the general technical principles of pressure swing adsorption for oxygen production. Pressure Swing Adsorption (PSA) is an advanced gas separation technology that is widely used in areas such as air drying, air separation (for the extraction of nitrogen or oxygen), and the purification of other gases. Basic principle of pressure swing adsorption: For any adsorbent and a given gas to be adsorbed (adsorbate), at adsorption equilibrium, the lower the temperature and the higher the pressure, the greater the amount of adsorption that occurs ； Conversely, the higher the temperature and the lower the pressure, the smaller the adsorption amount. Therefore, gas adsorption separation typically employs two cyclic processes: temperature swing adsorption and pressure swing adsorption. If the temperature remains constant and adsorption occurs under pressure, with desorption achieved by reducing pressure (evacuation) or at atmospheric pressure, this is known as pressure swing adsorption. In pressure swing adsorption operations, due to the low thermal conductivity of the adsorbent, the temperature changes in the adsorbent bed caused by the adsorption heat and desorption heat are minimal; therefore, it can be approximated as an isothermal process. As we can see from the diagram, pressure swing adsorption relies on the difference in the amount of gas that an adsorbent can absorb at different pressures to achieve gas separation; for example, to produce pure oxygen, the latter option is chosen