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

A fiber compounding and manufacturing method technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of difficult coating on the outside of hollow fiber base membrane, difficulty in accurately controlling the liquid content on the membrane surface, 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: 2006-11-22
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 and product
  • Hollow fiber composite membrane applicator, method for producing said hollow fiber composite membrane and product
  • Hollow fiber composite membrane applicator, method for producing said hollow fiber composite membrane and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An embodiment of the inventive coating machine is designed as follows: the diameter of the feeding roller 1 and the receiving roller 11 are both 450mm, the height of the drying tube 4 is 1.5M, the height of the drying tube 8 is 1.5M, the length of the stainless steel reaction tube 5 is 1.5M, and the coil The ascent angle is 6 degrees. A contact counter is used to record the number of unwinding and winding layers. The variable frequency motors 12 and 12’ use YST12A, the inverter uses INVERTER’s CVF-72, and the PLC controller 13 uses Siemens’ ST-200CN.

Embodiment 2

[0029] Another embodiment of the inventive coating machine is designed as follows: the diameters of the feeding roller 1 and the receiving roller 11 are both 1000mm, the height of the drying tube 4 is 1M, the height of the drying tube 8 is 2M, the length of the stainless steel reaction tube 5 is 2.5M, and the winding The rise angle is 6 degrees. A contact counter is used to record the number of unwinding and winding layers. The variable frequency motors 12 and 12’ use YST12A, the inverter uses INVERTER’s CVF-72, and the PLC controller 13 uses Siemens’ ST-200CN.

Embodiment 3

[0031] Using the device of Example 1, the water phase concentration is 2% (weight ratio) piperazine aqueous solution, the water phase immersion time is 40 minutes; the concentration of TMC's n-hexane solution is 0.5%, and the polysulfone hollow fiber base membrane stays in the reaction tube The time is 30 seconds (the operating linear speed of the device in Example 1 is 3 m / min), and a uniformly coated nanofiltration hollow fiber composite membrane can be prepared. The air temperature of the front drying tube 4 is 65℃, and the air volume is 1m 3 / min; the air temperature of the post-drying pipe 8 is 75℃, and the air volume is 0.6m 3 / min.

[0032] Experiments show that the obtained hollow fiber nanofiltration composite membrane is effective against 2g / L MgSO under 0.4MPa. 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 present invention relates to a membrane technology, specifically a hollow fiber composite membrane coating machine and a manufacturing method and product using the machine to prepare a hollow fiber composite membrane. The main international patent classification number is intended to be Int.Cl. 7 B29C70 / 50. Background technique [0002] The composite method is currently the most commonly used and effective method for preparing high-performance ultrafiltration membranes, nanofiltration membranes and reverse osmosis membranes. This method is to compound an ultra-thin surface layer with nanometer-scale pores on a microporous base membrane. The composite membrane has unparalleled advantages. Its ultra-thin surface layer can be as thin as several nanometers, which enables the membrane to have a high flux. In addition, because the amount of chemicals used in the ultra-thin surface layer is very small, expensive high-performance monomer interfacial poly...

Claims

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Application Information

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Patent Type & Authority Applications(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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