Supergravity membrane separator consisting of a plurality of independent membrane assemblies fixed on rotating disk

Abstract

The invention relates to a supergravity membrane separator consisting of a plurality of independent membrane assemblies fixed on a rotating disk. A single membrane assembly is dispersed into a plurality of independent membrane assemblies to be arranged on a rotating disk, the membrane separation under the supergravity is realized through the rotation of the rotating disk, and the bidirectional flow high-power concentration and pervaporation membrane separation is realized under the supergravity through low-pressure uniform feeding of a side-blown material at a membrane-permeating side. The supergravity membrane separator has the advantages of low concentration polarization, low membrane pollution, large permeation flux and high concentration of interceptions of the membrane separation under the supergravity, also has the advantages of simple structure, easy repair of the membrane assemblies, and the like, and can be used for process operations of separation, concentration, purification, sewage treatment, organic matter dewatering and the like.

Description

Technical field: [0001] The invention relates to a novel membrane separator, in particular to a high-gravity membrane separator in which the membrane separation process is placed in a rotating centrifugal high-gravity field. Background technique: [0002] As a new type of high separation, concentration, purification and purification technology, the membrane separation process has been widely used in chemical, food, medicine, environmental protection and other fields due to its high efficiency, energy saving and environmental protection. However, due to the existence of concentration polarization and membrane fouling, the promotion and application of membrane separation technology are limited in many aspects. Because of its ability to greatly strengthen the "three passes" and "one reverse", the high-gravity technology has been developed into a variety of high-gravity application equipment, which is applied in chemical industry, environmental protection, and nano-material manu...

AI Technical Summary

Problems solved by technology

At present, there are not many achievements in research and application, and there are not many related papers and patent documents. Among the known available materials, there is only "Rotating Bed Supergravity Field Device with Tubular Structure" (patent application number 03115674.6) and "Centrifugal Rotation High Gravity-Membrane Separation Technology" (Patent Application No. 03100089.4) published two patents, although the two patents proposed membrane separation in which the separation membrane, feed liquid and permeate were placed in a rotating high gravity field scheme, but did not recognize the characteristics and causes of membrane separation under the above-mentioned high-gravity conditions, and failed to strengthen the characteristics of the membrane material according to its characteristics and causes, such as "Centrifugal Rotation High Gravity - Membrane Separation Technology" Its characteristics emphasize that the membrane surface faces the axis of the drum. Such a membrane arrangement will make concentration polarization and membrane fouling more serious.

"Rotating Supergravity Field Device with Tubular Structure" emphasizes that both ends of the tubular membrane or hollow fiber membrane are fixed and arranged radially. It cannot be in a straight line and maintain a radial arrangement. If it is forced to be arranged in a radial direction by fixing both ends, the hollow fiber membrane is easily broken

"A Membrane Module Working Under Supergravity Conditions" (Patent Application No. 2008207417002) proposes a membrane module working under supergravity conditions, which better solves the deficiencies of the above two patents, but it only proposes one This kind of membrane module has not solved many practical application problems of the membrane module in the ultra-gravity centrifugal field to achieve high-gravity membrane separation, and it cannot be used in a machine.

The patent "Super Gravity Membrane Separator" (patent application number 200920096834.1) aimed at the deficiencies of the above patents by adopting the membrane module mentioned in the patent "A Membrane Module Working Under Supergravity Conditions", and solved the super There are many key issues in the gravity membrane separation process, but there are still many deficiencies in this patent, specifically: 1. There is only one membrane module in the whole machine and the structure is large. If any part of the membrane is damaged, the whole membrane module cannot be repaired or even scrapped

2. Membrane module processing is difficult and costly

3. The feeding of the purge material on the permeation side of the membrane cannot be realized

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