Inert system for civil airplane

Abstract

The invention discloses an inert system for a civil airplane, relates to a composite-film separated nitrogen making system, and belongs to the field of aviation industry machining building. The inert system for the civil airplane comprises an air pre-treating system, a gas film separating system and an automatic control system, wherein compressed air is output from the air pre-treating system and the gas film separating system under the control of the automatic control system; high-temperature compressed gas produced by an engine compressor of the airplane passes through a supply pipeline and the air pre-treating system to supply compressed air to the gas film separating system; cold air produced by an external duct of the airplane engine passes through a fan supply pipeline to supply cold air for refrigeration to the air pre-treating system; and the gas film separating system consists of a plurality of composite-film pipe components with the same or different separation coefficients and the optimum working temperatures which are connected through manifolds, and outputs and distributes nitrogen gas to each fuel tank of the airplane through parallelly connected pneumatic or electric variable-flow valves and a low-flow hole.

Description

technical field [0001] The invention relates to an on-board inertization system for civil airliners, in particular to a composite membrane separation nitrogen production system, which belongs to the field of aviation industry machinery manufacturing. Background technique [0002] Nitrogen is an inert gas, which can be widely used in the operation process of various industrial equipment whose main purpose is to isolate oxygen. Since the air contains about 78% nitrogen, it is convenient to separate the compressed air to make nitrogen After being enriched, various nitrogen production systems have emerged. According to statistics on helicopter or aircraft fire accidents, fuel ignition or explosion is the most serious problem. It is generally believed that when the fuel vapor and air in the fuel tank in the closed area are mixed, there are already two factors that cause the flame to occur. When the air is in the When the oxygen content is 12%-22%, electrical appliances, lightnin...

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Problems solved by technology

[0003] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an inertization system for civil airliners, which is small in size and light in weight, simple in nitrogen production system, capable of continuous nitrogen production, high in reliability, and satisfies the requirements for various civil aircrafts. Requirements for low cost and high safety of passenger aircraft

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