Automatic roll-coating method and automatic roll-coating device of ethanol-permselective composite membrane

A technology that preferentially permeates alcohol and composite membranes. It is used in semi-permeable membrane separation, chemical instruments and methods, and membrane technology. It can solve problems such as unstable performance, low permeation flux, and surface defects.
CN104722211AInactive Publication Date: 2015-06-24BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2015-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an automatic roll-coating method and device of an ethanol-permselective composite membrane, belonging to the technical field of membrane coating of separation membranes. A coating device comprises a roller, a gear, a support plate, a base, a motor, a feed liquid tank, a lifting table and the like. The coating method provided by the invention comprises the following steps: pouring membrane preparing liquid into a storage tank, conveying the feed liquid to the feed liquid tank through an automatic feeding device, adjusting the height of the feed liquid tank by using the lifting table and the scale marks at one end of the roller; rotating the roller through the driving of the motor so as to uniformly coat a base membrane with the feed liquid. Through the adoption of the method and the device disclosed by the invention, the thickness of a separation layer can be effectively controlled and reduced, the permeation flux is greatly improved, and the automatic coating of the ethanol-permselective composite membrane is realized.
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Description

technical field

[0001] The invention belongs to the technical field of separation membrane coating, and relates to an automatic coating device and method for a separation membrane, in particular to an automatic roll coating device and method for preparing an alcohol-preferential composite membrane. Background technique

[0002] As oil prices rise, fuel ethanol and butanol, as a new type of biofuel, are highly valued by countries all over the world for their advantages of high efficiency and cleanliness. The coupling of pervaporation and biological fermentation technology is an important way to improve the fermentation rate and yield. Pervaporation uses selective membrane separation technology to achieve alcohol / water separation without evaporating the mixture to the boiling point, low energy consumption, high separation purity, no secondary pollution, and continuous operation of the entire system.

[0003] Generally speaking, the preparation methods of alcohol permeable fil...

Claims

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