A membrane module structure of an air separator

Abstract

The invention belongs to the air separation membrane technology and relates to an improvement of the membrane module structure of an air separator. It is characterized in that: there is a non-metallic support tube 15 set outside the hollow fiber membrane tow 8, and the two ends of the non-metallic support tube 15 are respectively connected with the epoxy resin head 7 at the intake end through epoxy resin casting. , The epoxy resin sealing head 9 at the gas outlet end is connected as a whole. The present invention proposes a membrane module structure of an air separator, in order to enhance the ability of the hollow fiber membrane tow near the air outlet to permeate oxygen, improve the nitrogen production efficiency of the membrane module, and reduce the cracking of the epoxy resin head at the inlet end Probability, ensuring the airtightness of the system; at the same time, reducing heat loss in high-altitude and low-temperature environments.

Description

technical field [0001] The invention belongs to the air separation membrane technology and relates to an improvement of the membrane module structure of an air separator. Background technique [0002] The core device in the aircraft fuel tank inerting system is the air separator, and the core component of the air separator is the membrane module. The membrane module structure of the current air separator can be found in figure 1 , which consists of a cylinder body 1, an air inlet head 2, an air inlet first sealing ring 3, an air inlet screw 4, an air inlet retaining ring 5, an air inlet second sealing ring 6, an air inlet epoxy resin Head 7, hollow fiber membrane tow 8, epoxy resin head at gas outlet 9, second sealing ring 10 at gas outlet, retaining ring 11 at gas outlet, screw 12 at gas outlet, first sealing ring 13 at gas outlet, and gas outlet head 14 compositions. Cylinder 1 is a cylinder, and there is an exhaust port 1a on the left side of the cylinder of cylinder 1,...

AI Technical Summary

Problems solved by technology

The shortcoming of this structure is: the first, the oxygen concentration that oozes out near the air inlet at hollow fiber membrane tow bundle 8 is high, and quantity is many

The current structure makes high-concentration oxygen diffuse to the entire annular space outside the hollow fiber membrane tow 8, which weakens the oxygen permeability of the hollow fiber membrane tow 8, resulting in a reduction in the nitrogen production efficiency of the hollow fiber membrane separation module.

Second, the connection strength between the epoxy resin head at the intake end and the intake end is low

At the beginning of work, due to the pressure rise of the air inlet, the retaining ring 5 of the air inlet end is subjected to a great force, and when it works repeatedly for a long time, it is easy to cause the epoxy resin head 7 of the air inlet end to crack, which destroys the airtightness of the system

Third, the membrane module works in a low-temperature environment in the air, and the nitrogen production efficiency is affected by the low temperature, which leads to a decrease

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