Inset tube type multi-holed jet

Abstract

The invention relates to an insert tube multi-holed jet which comprises an insert tube and a spinneret plate. The invention is characterized in that the multi-holed jet is a cuboid assembled by an upper plate, a middle plate and a lower plate; the center of the upper plate is provided with a first casting liquid inlet and the side surface is provided with a core liquid or nitrogen inlet; the two inlets are not communicated; the center of the middle plate is provided with a second casting liquid inlet which is vertically penetrated with a casting liquid distribution tube; the two sides of the casting liquid distribution tube are symmetrically provided with 3 to 6 casting liquid distribution pipelines from the inside to the outside; besides, the diameters thereof are increased gradually from the middle to the two sides; the two sides of the casting liquid distribution tube are symmetrically provided with tube holes for mounting the insert tube; each tube hole is provided with a lower perforating plate and the insert tube of the spinneret plate; the lower plate is provided with a casting liquid slot; a lower casting liquid pipeline is arranged on the casting liquid slot; the diameterof the lower casting liquid pipeline is 1 to 3mm more than the diameter of the insert tube arranged in the lower casting liquid pipeline; the mounting hole of the spinneret plate is arranged on the bottom surface of the lower plate; a fixing hole the diameter of which is 0.5 to 1.5mm more than the diameter of the mounting hole is correspondingly arranged on the spinneret plate.

Description

technical field [0001] The invention relates to hollow fiber membrane manufacturing equipment technology, in particular to an insertion tube type porous spinneret for preparing hollow fiber membranes, and the international patent main classification number is intended to be Int.CI.DOID.4 / 00(2006.01)I. Background technique [0002] Hollow fiber membranes are one type of separation membranes. It has been widely used in the field of membrane separation technology due to its many advantages such as high packing density, simple production process, and miniaturized equipment. [0003] In the research and production of hollow fiber membranes, inserting tube spinnerets are mainly used. There are many patents for the single-hole insert tube spinneret, such as the hollow membrane insert tube spinneret introduced by CN2167997; the insert tube spinneret etc. for the hollow membrane introduced by CN1148639. Single-hole hollow fiber membrane spinnerets have been widely used, but their p...

AI Technical Summary

Problems solved by technology

Single-hole hollow fiber membrane spinnerets have been widely used, but their production efficiency is low and the technology is relatively backward

And the existing single-hole inserting tube spinneret technology is popularized for the multi-hole inserting tube spinneret, mainly has the following problems: 1. It is inconvenient to adjust, that is, it is difficult to adjust the central inserting tube of each spinneret hole respectively and one by one. The concentricity between the spinneret and the spinneret, thus affecting the stability and consistency of product quality; 2. The structure is not reasonable, that is, the existing porous spinneret cannot guarantee the casting liquid entering each spinneret Maintain the same pressure and uniformity, thus also affecting the stability and consistency of product quality

The main disadvantage of this kind of porous special-shaped spinneret is that there are very few polymers compatible with it, and the hollow fiber membranes spun are relatively thin, which is only suitable for the preparation of external pressure hollow fiber membranes, which greatly limits its application range.

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