The Study Of Oxygen Separation From Air By Membrane Permeation With Pressure Swing Adsorption

With the development and update of weapon and equipment, aviation flight puts forward higher demand for logistics support. As an essential part of logistics support, aerial oxygen has significance to put across flight, fight and training.Considering the high altitude of oxygen use and in case that the trace water in oxygen may freeze the pipe, oxygen for aviation use requires the purity be high. The active service aviation oxygen is produced by cryogenic distillation, which cannot meet the demand of air force development and accurate support due to its complex process, high breakdown rate and poor operability. In addition, large investment in small scale oxygen production equipment leads to a high oxygen cost. To solve the problem, new oxygen production device with simple process and high operability is in need.In 1990s, pressure swing adsorption was widely used from small scale oxygen production in medical use to large scale in industry. Compared with cryogenic distillation and pressure swing adsorption, membrane penetration is characterized by simple device, easy operability, low investment and low cost in producing oxygen of medium quality.However, due to various reasons, domestic membrane penetration device develops slowly and falls far behind the advanced levels abroad whether in materials, performance or installation types.Based on the theory of membrane penetration and pressure swing adsorption, this article chooses membrane module and molecular sieve suitable for producing oxygen, fixing the process that enriched oxygen is obtained through membrane penetration and then through molecular sieve system to make oxygen of high purity, and working out an oxygen production device combining membrane and molecular sieve. Trial use of the device helps analyze such factors as pressure, temperature, and discharge that will affect the purity of the oxygen, and provides proof of improvement. The advantage of the device is that it combines membrane with molecular sieve and works out a system of getting oxygen of high purity. It also shares the good points of membran(?) penetration and pressure swing adsorption characterized by quick start, high operability. The device...