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Reinforcing hollow fiber membrane lining and pretreatment technology

A fiber membrane and reinforced technology, applied in the field of composite membrane material preparation, can solve the problems of complex manufacturing process, undisclosed manufacturing method, complicated textile process, etc., and achieve the effects of simple operation, avoiding peeling and tearing, and obvious processing effect.

Active Publication Date: 2017-01-04
江苏巨之澜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution first needs to prepare long yarns with a PET / PVDF core-sheath structure, the production process is relatively complicated, and the specific production method is not disclosed
In addition, the textile process of weaving two different types of long yarns together is also relatively complicated.

Method used

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  • Reinforcing hollow fiber membrane lining and pretreatment technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First, the reinforced lining is immersed in the pretreatment liquid for a period of time through the wire feeding device, and then the excess pretreatment liquid is removed by rollers and shearing and blowing in turn, and finally the reinforced lining is passed through the long and thin needle tube to restore the circular shape.

[0040] The type of reinforced lining is a polyethylene terephthalate fiber braided tube with an outer diameter of 0.9 mm, a weaving density of 20 meshes, and 24 braiding spindles. The pretreatment liquid was dimethylacetamide, whose pH was adjusted to 5.0, and the added polymer was polymethyl methacrylate with a content of 1.0 wt%.

[0041] In the pretreatment process, the residence time of the reinforced lining in the treatment liquid is 2 s, the working pressure of the roll is 0.5 kg, and the air drying takes 5 s; The volume is 30%; the inner diameter of the elongated needle is 0.9 mm and the length is 10 cm.

[0042] The rest of the film-m...

Embodiment 2

[0045] Firstly, the reinforced lining is immersed in the pretreatment solution for a period of time through the wire feeding device, and then the excess pretreatment solution is removed by rollers and shearing and blowing in turn, and finally the reinforced lining is passed through the long and thin needle tube to restore the circular shape.

[0046]The type of reinforced lining is polyamide fiber knitted tube, its outer diameter is 0.3 mm, the weaving density is 10 mesh, and the number of weaving spindles is 8. The pretreatment solution is a mixed solution of dimethylformamide / water, the mixing ratio is 1:1, and its pH is adjusted to 2.0. The added polymers are polymethyl acrylate and polyethyl acrylate, and the contents are 0.1 wt% and 1.0 wt%, respectively. wt%.

[0047] In the pretreatment process, the residence time of the reinforced lining in the treatment liquid is 0.5 s, the working pressure of the roll is 0.5 kg, and the air drying takes 5 s; The volume is 10%; the i...

Embodiment 3

[0051] First, the reinforced lining is immersed in the pretreatment liquid for a period of time through the wire feeding device, and then the excess pretreatment liquid is removed by rollers and shearing and blowing in turn, and finally the reinforced lining is passed through the long and thin needle tube to restore the circular shape.

[0052] The type of reinforced lining is a polyester fiber braided tube with an outer diameter of 2.0 mm, a braiding density of 60 mesh, and a braiding spindle number of 32. The pretreatment liquid is ethylene glycol, whose pH is adjusted to 9.0, and the added polymer is polyethyl acrylate with a content of 5.0 wt%.

[0053] In the pretreatment process, the residence time of the reinforced lining in the treatment liquid is 10 s, the working pressure of the roll is 5.0 kg, and the air drying takes 30 s; The volume is 50%; the inner diameter of the elongated needle is 2.0 mm and the length is 50 cm.

[0054] The rest of the film-making condition...

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Abstract

The invention belongs to the field of composite membrane material preparation, and particularly relates to a pretreatment technology of a reinforcing hollow fiber membrane lining. The pretreatment technology is characterized in that firstly, a reinforcing lining is immersed in pretreatment liquid for a period of time through a wire feeding device; then, redundant pretreatment liquid is removed in a rolling mode and a shear air-blowing mode in sequence; finally, the reinforcing lining is made to penetrate through a thin and long needle tube to be restored to the round shape. In the pretreatment process, by using the selected pretreatment liquid, the bonding strength between a hollow fiber membrane and the reinforcing lining can be effectively improved to prevent peeling and tearing of a membrane layer, so that a prepared lining-reinforced hollow fiber membrane has better mechanical properties, and the peeling strength between the membrane separation layer and the reinforcing lining is improved and is higher than 0.5 MPa; meanwhile, the bubble point pressure is larger than 0.2 MPa, and the water flux can be increased by 30% or above.

Description

technical field [0001] The invention belongs to the field of composite membrane material preparation, and in particular relates to a pretreatment process for a reinforced hollow fiber membrane lining. Background technique [0002] With the continuous improvement of the degree of industrialization and the deteriorating quality of various water sources, good chemical stability, high mechanical strength, and strong anti-pollution ability have become more and more common requirements for the performance of membrane separation materials. At present, in the field of membrane bioreactor (MBR) engineering in the world, hollow fiber membrane elements have already taken a clear advantage, especially the liner-enhanced hollow membrane elements developed for the high mechanical strength required by the MBR (Membrane Bio-Reactor) process. The fiber membrane element has completely solved the problem of broken wires that has plagued the industry for a long time, so the market application p...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D69/12B01D67/00B01D71/56B01D71/48B01D71/54
CPCB01D67/00B01D69/08B01D69/12B01D71/48B01D71/54B01D71/56
Inventor 黄小军李晶
Owner 江苏巨之澜科技有限公司
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