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Aircraft fuel tank flammability reduction methods and systems and air separation methods using membranes
Aircraft fuel tank flammability reduction methods and systems and air separation methods using membranes
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机译:降低飞机燃油箱可燃性的方法和系统以及使用膜的空气分离方法
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摘要
An aircraft fuel tank flammability reduction method includes contacting a membrane filter with air feed (17), permeating oxygen and nitrogen from the air feed through the membrane (22), and producing filtered air (21) from the filter (22). The filtered air (21) is produced from the filter as a result of the membrane removing any hydrocarbons containing six or more carbon atoms to produce a total of 0.001 ppm w/w or less. An air separation method includes feeding air into a filter containing a hollow fiber membrane that exhibits the property of resisting degradation due to exposure to hydrocarbons containing six or more carbon atoms. The filter (22) exhibits a pressure drop across the membrane (22) of less than 5 psi. The method includes feeding the filtered air (21) into an air separation module (12) containing a hollow fiber membrane that exhibits a susceptibility to degradation from exposure to hydrocarbons containing six or more carbon atoms.
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机译:降低飞机燃料箱的可燃性的方法包括使膜过滤器与空气进料(17)接触,使来自空气进料的氧气和氮气透过膜(22)渗透,并从过滤器(22)产生过滤后的空气(21)。由于膜除去了任何含有六个或更多碳原子的烃而产生的总空气量为0.001 ppm w / w或更少,因此从过滤器中产生了过滤后的空气(21)。空气分离方法包括将空气供入含有中空纤维膜的过滤器中,该中空纤维膜表现出抵抗由于暴露于含有六个或更多个碳原子的烃而引起的降解的特性。过滤器(22)在膜(22)上的压降小于5psi。该方法包括将过滤后的空气(21)进料到包含中空纤维膜的空气分离模块(12)中,该中空纤维膜由于暴露于包含六个或更多个碳原子的烃而表现出对降解的敏感性。
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