Hollow fiber composite membrane applicator, method for producing said hollow fiber composite membrane

A fiber compounding and manufacturing method technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of coating on the outside of the hollow fiber base membrane, difficulty in accurately controlling the liquid content on the surface of the membrane, and the quality of the membrane. Difficult to guarantee and other problems, to achieve the effect of simple structure, low cost, uniform coating

Inactive Publication Date: 2008-08-20
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common problem of the above technologies is discontinuous coating operation, it is difficult to coat the outside of the hollow fiber base membrane
If bundled (outer) coating is performed as described above, it is easy to cause blocking between hollow fibers
However, the effective filtration area of ​​the hollow fiber composite membrane (inner pressure membrane) of the inner coating is far less than that of the outer coating (outer pressure membrane), and it is difficult to accurately control the liquid (water phase or oil phase) content on the surface of the membrane when the inner coating is implemented. , making it difficult to guarantee the quality of the film
One of the keys to continuous coating on the outside of the hollow fiber membrane is to solve the problem of its low strength and easy breakage

Method used

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  • Hollow fiber composite membrane applicator, method for producing said hollow fiber composite membrane
  • Hollow fiber composite membrane applicator, method for producing said hollow fiber composite membrane
  • Hollow fiber composite membrane applicator, method for producing said hollow fiber composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An embodiment of the inventive coating machine is designed as follows: the diameters of the wire feeding roller 1 and the wire receiving roller 11 are both 450mm, the height of the drying pipe 4 is 1.5M, the height of the drying pipe 8 is 1.5M, and the length of the stainless steel reaction pipe 5 is 1.5M. Around the rise angle of 6 degrees. A contact counter is used to record the number of unwinding layers and the number of winding layers. Frequency conversion motors 12 and 12' use YST12A, inverters use INVERTER's CVF-72, and PLC controller 13 uses Siemens ST-200CN.

Embodiment 2

[0030] Another embodiment of the invention coating machine is designed as follows: the diameter of the wire feeding roller 1 and the wire receiving roller 11 is 1000mm, the height of the drying pipe 4 is 1M, the height of the drying pipe 8 is 2M, the length of the stainless steel reaction pipe 5 is 2.5M, and the winding The rise angle is 6 degrees. A contact counter is used to record the number of unwinding layers and the number of winding layers. Frequency conversion motors 12 and 12' use YST12A, inverters use INVERTER's CVF-72, and PLC controller 13 uses Siemens ST-200CN.

Embodiment 3

[0032] Use embodiment 1 device, water phase concentration is the piperazine aqueous solution of 2% (weight ratio), and water phase immersion time is 40 minutes; The concentration of the n-hexane solution of TMC is 0.5%, polysulfone hollow fiber base membrane stays in reaction tube The time is 30 seconds (the operating line speed of the device in Example 1 is 3m / min), and a uniformly coated nanofiltration hollow fiber composite membrane can be prepared. The air temperature of the front drying pipe 4 is 65°C, and the air volume is 1m 3 / min; the air temperature of the post-drying pipe 8 is 75°C, and the air volume is 0.6m 3 / min.

[0033] Experiments have shown that the hollow fiber nanofiltration composite membrane of gained is under 0.4MPa, to the MgSO of 2g / L. 4 The rejection rate can reach 96.8%, and the flux can reach 20.0L / m 2 h.

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Abstract

The invention relates to a hollow fiber complex coating machine and the preparing method and product. Said coating machine comprises roller installed in water phase tank, front drying pipe, reacting pipe, back drying pipe, godet roller and pick-up roller all of which are sequentially connected with water tank; reacting pipe is installed horizontally and pipe jointed with organic phase replenishing device in the inlet, and pipe jointed with overflow device in the outlet; front drying pipe and back drying pipe are vertically installed; roller and pick-up roller are connected with PLC controller and two variable-frequency control generator connected to PLC controller respectively. The method can continuously produce hollow fiber complex film, which is characterized by even coating and stable quality.

Description

technical field [0001] The invention relates to a membrane technology, specifically a hollow fiber composite membrane coating machine and a manufacturing method and products using the machine to prepare hollow fiber composite membranes. The main classification number of the international patent is intended to be Int.C1 7 B29C70 / 50. Background technique [0002] The composite method is currently the most widely used and effective method for preparing high-performance ultrafiltration membranes, nanofiltration membranes and reverse osmosis membranes. The method is to compound an ultra-thin surface layer with a nanoscale pore diameter on the microporous base membrane. The composite membrane has unparalleled advantages, and its ultra-thin surface layer can be as thin as several nanometers, so that the membrane has a higher flux. In addition, since the amount of chemicals used in the ultra-thin surface layer is very small, expensive high-performance monomer interfacial polymeriz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/12
Inventor 张宇峰刘恩华田国军许以农王薇杜启云肖长发
Owner TIANJIN POLYTECHNIC UNIV
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