Device and method for preparing hollow fiber membrane

Abstract

The invention discloses a braided tube conveying device, which comprises a braided tube connector, a wire guide wheel and a braided tube disc mounting frame, and the braided tube connector is arrangedbetween the braided tube disc mounting frame and the wire guide wheel. The device provided by the invention avoids the problems of midway connection traction and online knitting speed limitation of aknitting pipe in the original process, stabilizes the spinning tension and speed, is convenient to operate in the process, is easy for industrial continuous production, and reduces the production anduse cost.

Description

technical field [0001] The invention belongs to the field of material processing equipment, and in particular relates to a device and method for preparing hollow fiber membranes. Background technique [0002] As one of the most commonly used separation membranes, hollow fiber membranes are widely used in sewage treatment and reuse, pure water production, chemical industry, seawater desalination, municipal water supply, electronics industry, pharmaceutical and bioengineering, food, textile and other fields, and the scale is gradually increasing. expand. At present, the main preparation methods of commercial hollow fiber membranes are melt-spinning-stretching (MSCS) method and immersion precipitation method (NIPS). The stretching method to prepare hollow fiber membrane technology has been disclosed in the 1970s. Generally, an extruder is used to extrude the resin melt and draw it at high speed, and then go through cold stretching, hot stretching and heat setting. The raw mate...

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Problems solved by technology

The stretching method to prepare hollow fiber membrane technology has been disclosed in the 1970s. Generally, an extruder is used to extrude the resin melt and draw it at high speed, and then go through cold stretching, hot stretching and heat setting. The raw material is single, The diameter of the membrane is small and the packing density of the components is high, but the porosity is low and the pore size distribution is wide, which is difficult to meet the needs of large-scale industrial sewage treatment

The traditional NIPS method is the most widely used method in industrial membrane modules. The prepared membrane is a homogeneous membrane with high flux, but the strength of the membrane filament is poor. Therefore, one of the current solutions is to use braided tubes or long fiber reinforced membranes. This type of equipment often needs to process reinforcement materials at the same time, which is limited by the online processing speed of reinforcement materials, and usually uses spool unwinding, which brings intermittent operation problems and affects the efficiency of mass production

[0003] Chinese patent CN101543731A discloses a preparation method of reinforced hollow fiber membrane, which adopts the method of fiber online weaving-coextrusion, which is limited by the online weaving speed of reinforcing material in terms of spinning speed. Difficult to increase speed, thus affecting overall productivity

[0004] The scheme disclosed in the Chinese patent CN104096485A adopts a horizontal arrangement. Although the deepening of the first-stage solidification tank is avoided, the membrane filaments are affected by gravity in the primary state, which will cause uneven coating of the membrane filaments.

[0005] At present, there is an urgent need to provide a preparation device for reinforced hollow fiber membranes to solve the problems in the prior art that the braided tubes are connected and drawn during the spinning of the reinforced hollow fiber membranes, and the material waste of the braided tubes is wasted.

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