Molecular film gas purification method applied to positive pressure respiratory system of closed protective clothing

Abstract

The invention discloses a molecular film gas purification method applied to a positive-pressure respiratory system of closed protective clothing, which comprises the following steps: S1, ensuring the internal circulation air pressure of the positive-pressure respiratory system of the closed protective clothing through air draft equipment, extracting air exhaled by a wearer from an exhaust port of the closed protective clothing, and enabling the air to enter a pipeline; S2, enabling air exhaled by the wearer to pass through a molecular membrane through air draft equipment, wherein the molecular membrane is a membrane net which is composed of a plurality of hollow fiber membrane filaments and used for gas exchange and is used for achieving gas exchange by means of molecular pressure difference, carbon dioxide, ammonia gas and water vapor in an inner cavity of the molecular membrane can permeate the membrane wall to be diffused to the external atmospheric environment, and oxygen in the external environment is diffused into the inner cavity of the molecular film through the film wall; and S3, sending back the air subjected to exchange purification treatment of the molecular film to the interior of the closed protective clothing through the pipeline and the air inlet of the closed protective clothing by the air draft equipment, so that the wearer can breathe.

Description

technical field [0001] The invention relates to the technical field of breathing devices, in particular to a molecular membrane gas purification method applied to a positive pressure breathing system for closed protective clothing. Background technique [0002] At present, for the safety of staff in special environments, it is often necessary to use a closed positive pressure breathing system, such as positive pressure respirators, positive pressure protective clothing, etc. However, the current positive pressure breathing system for closed protective clothing usually requires an external oxygen cylinder to continuously supply the inside of the sealed structure. The structure is complex and troublesome to wear, and once the oxygen in the oxygen cylinder is exhausted, the device will become unusable . Moreover, the purification equipment used in current protective clothing is similar to the filter material of protective masks, which can only be used under general conditions ...

AI Technical Summary

Problems solved by technology

However, the current positive pressure breathing system for closed protective clothing usually requires an external oxygen cylinder to continuously supply the inside of the sealed structure. The structure is complex and troublesome to wear, and once the oxygen in the oxygen cylinder is exhausted, the device will become unusable

Moreover, the purification equipment used in current protective clothing is similar to the filter material of protective masks, which can only be used under general conditions and cannot meet the protection level requirements of P3 and P4 laboratories.

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