Porous Hollow Fiber Membrane Spinning Device

Abstract

The invention provides a novel porous hollow fiber membrane spinneret device, including a feeding plate, a core liquid guide plate, a spinneret plate and a separate spinneret; wherein, the feeding plate is provided on the upper surface of the core liquid guide plate, the spinneret plate is provided on the lower surface of the core liquid guide plate; a number of the separate spinnerets are detachably provided in the assembly holes of the spinnerets of the spinneret plate. In the device the quantity of the separate spinneret is more than one, forming a porous combination type, the structure of the device is simple, the preparation process is simple, in the production process of spinnerets, the flow of the core liquid and the material liquid is more uniform, the membranes has uniform thickness, and the consistency is good.

Description

technical field [0001] The present invention relates to hollow fiber membranes, in particular to a novel porous hollow fiber membrane spinning device. Background technique [0002] Hollow fiber membrane is the core component of equipment in the fields of water treatment, hemodialysis, seawater desalination, gas separation, liquid separation, etc. It is an important new material used in reverse osmosis membrane, microfiltration membrane, nanofiltration membrane and ultrafiltration membrane, etc. , It has gradually been more and more widely used in the fields of environmental protection water treatment, hemodialysis, gas separation and so on. With the improvement of the quality and performance requirements of hollow fiber membranes and the increase of demand, the existing domestic production processes and equipment are becoming more and more difficult to meet the production needs, and most of them rely on imports. [0003] How to produce high-performance hollow fiber membrane...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the domestic spinning hollow fiber membranes use single-hole spinnerets, which can only produce one filament at a time when spinning, and the production efficiency is extremely low, which cannot be mass-produced on a large scale.

The existing multi-hole spinneret cannot ensure that the core liquid entering each core liquid tube and the feed liquid entering each spinneret hole maintain the same pressure and uniformity, thus also affecting the stability and consistency of product quality, as described in the patent Literature CN 204570108U, CN101372765A

In some porous spinnerets, an independent spinneret is set for each spinneret hole, so that although the concentricity of the spinneret hole and its corresponding core liquid tube can be adjusted separately, the uniformity of the thickness of the membrane filament can be ensured. Improve the quality, but the operation is too cumbersome. Moreover, even if this type of spinneret is adjusted well, after a period of use, the membrane filaments will still be eccentric and must be readjusted.

It is conceivable that if there are hundreds of holes, thousands of holes always need to be adjusted after a period of time. The workload is huge, which is obviously not conducive to large-scale production, such as patent documents CN101372765, CN204803446U

In some porous spinnerets, the core liquid tube is fixed design, so if individual core liquid tubes are blocked or damaged, they must be replaced together with the input and storage parts of the feed liquid and core liquid, which is extremely wasteful and inconvenient to replace, such as Patent document CN204803446U

In addition, in most porous spinnerets, whether the core liquid pipe is a detachable design, such as patent document CN101372765A, or a porous spinneret composed of multiple single-hole small spinnerets, such as patent document CN204570108U, in In case of blockage or damage of individual core liquid pipes or small single-hole nozzles, it must be shut down for maintenance. At the same time, the entire porous spinneret needs to be disassembled, which takes a long time and is difficult to maintain

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