Detecting device and detecting method for penetrating quality of gas separation membrane for preferably penetrating organic substances

Abstract

The invention discloses a detecting device and a detecting method for penetrating quality of a gas separation membrane for preferably penetrating organic substances. A first buffer tank of the detecting device communicates with a gas source through a pipeline; an outlet communicates with a membrane assembly through a first compressor; a raw gas sampling hole is formed in an inlet of the membrane assembly; a residual gas outlet of the membrane assembly is connected with the first buffer tank through a reflux pipeline; the residual gas sampling hole and a residual gas flow meter are arranged onthe reflux pipeline; a penetrating gas outlet of the membrane assembly is connected with a second buffer tank through a vacuum pump; and a penetrating gas sampling hole and a penetrating gas flow meter are arranged at an outlet of the second buffer tank. The residual gas of the device is returned into raw gas for being recycled, so that gas sources are saved, and large capacity of raw gas can be obtained. The detecting method adopts carbon dioxide-nitrogen gas as raw material gas, and test permeability performance of carbon dioxide to membrane to represent permeability performance of the gas,the detecting method is simple to operate, safe and environmentally friendly, and strong in applicability.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a detection device and a detection method for the permeability performance of a separation membrane that preferentially permeates organic matter and gas. Background technique [0002] Gas separation membrane technology is a green separation technology. Compared with separation technologies such as "cryogenic separation" and "pressure swing adsorption separation", its separation process has high separation efficiency, low energy consumption, no phase change, and no secondary pollution. , small footprint, convenient operation, easy industrialization and other advantages, it is recognized as the most promising new gas separation technology in the 21st century. The core separation membrane material of the gas separation membrane is divided into two types: glass state and rubber state. For the separation of non-condensable gas (small molecular gas, such as oxyg...

AI Technical Summary

Problems solved by technology

However, for the detection method of the performance of the gas separation membrane that preferentially permeates organic matter in the separation of organic gases, there is no unified detection standard at present, and most of them rely on the separation effect data of organic gases in the actual engineering application system

For laboratory research or manufacturers, it is difficult to obtain organic gas as raw material gas, and it is not environmentally friendly, and it is easy to cause secondary pollution. Organic gas cannot be directly discharged after testing, which increases costs.

[0005] CN103432909 discloses a method for testing the performance of a membrane module, which directly discharges the gas that has not penetrated the membrane to the outdoor atmosphere or condenses it, which not only pollutes the atmosphere, but also causes waste of test gas resources

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