High-purity Airborne Oxygen-Nitrogen Generation System and Working Method Based on Membrane Separation Technology

Abstract

The invention discloses a new type of high-purity airborne oxygen-nitrogen production system based on membrane separation technology, which belongs to the technical field of aviation systems. The system of the invention is designed for the hollow fiber membrane device, and the separated oxygen is extracted in layers. The high-concentration oxygen is first extracted as the pilot's breathing oxygen, and the low-concentration oxygen is extracted later for the cockpit to replenish air. In addition, the nitrogen separated by the separation device is used to inert the fuel tank to realize the sustainable output of high-pressure high-purity oxygen and nitrogen-enriched gas, providing a reliable guarantee for the pilot's breathing and fuel tank inerting and explosion-proof. Moreover, the air pretreatment is simple, and the ambient air at normal temperature and pressure can be used directly. The invention has the advantages of high system integration, long service life, high oxygen output concentration, good reliability and the like.

Description

technical field [0001] The invention belongs to the technical field of aviation systems, and relates to an airborne oxygen-nitrogen production system, in particular to a novel high-purity airborne oxygen-nitrogen production system based on membrane separation technology and a working method. Background technique [0002] On April 9, 2019, a Japanese F-35 crashed into the sea, and the pilot's oxygen supply system had serious problems. After the F-35 accident, the U.S. found that other fighters had the same problem. As the cabin hypoxia problem continued to expand, this incident attracted the attention of NASA. Compared with the oxygen supply carried by the oxygen tank, the airborne oxygen generation technology has the characteristics of continuous gas volume and constant airflow pressure. [0003] At the same time, fire or explosion of aircraft fuel tanks is one of the main causes of aircraft crashes. Therefore, for modern aircraft, effective measures must be taken to keep ...

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Problems solved by technology

[0005] In order to overcome the low concentration and low pressure of the oxygen-enriched air produced by the existing aircraft onboard oxygen-nitrogen production system, the present invention provides a new type of high-purity airborne oxygen-nitrogen production system, which is added by adding a Membrane fixing plate extracts the high-purity oxygen separated from the membrane first, and can directly supply oxygen to pilots after compression and cooling

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