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Spiral thin film element and its preparation method

A thin-film element, spiral technology, applied in the field of spiral thin-film element and its preparation, can solve the problems of fluid dead angle, easily damaged membrane cementation parts, reduce the effective filtration area of ​​the membrane, etc., and achieve the effect of maintaining integrity

Active Publication Date: 2014-10-29
TRITECH QINGDAO MEMBRANE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are obvious deficiencies in the flow channel design of HTI’s FO membrane elements. First, it is easy to produce fluid dead ends, which will reduce the effective filtration area of ​​the membrane and reduce the filtration efficiency of the membrane element; second, it cannot withstand large water flux and water pressure. It is easy to damage the cemented part of the membrane, thereby damaging the entire membrane element

Method used

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  • Spiral thin film element and its preparation method
  • Spiral thin film element and its preparation method
  • Spiral thin film element and its preparation method

Examples

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Effect test

Embodiment 1

[0049] Preferably, as an implementable manner, see image 3 , the spiral membrane element takes the drawing liquid inlet connecting pipe 4 and the drawing liquid outlet connecting pipe 5 as the axis respectively, and the film layer composed of the forward osmosis membrane 1, the drawing liquid guiding material 2 and the feeding liquid guiding material 3 is closely attached to The drawing liquid inlet connecting pipe 4 and the drawing liquid outlet connecting pipe 5 are spirally wound into a first cylindrical winding body and a second cylindrical winding body. In this embodiment, two wound bodies are formed, so that the flux of the spiral membrane element is large, and it is suitable for higher pressure.

[0050] Preferably, as an implementation mode, the sealing part in this embodiment includes an outer sealing part 6 and an inner sealing part, and the outer sealing part is arranged on the first cylindrical winding body and the second cylindrical winding body. The two axial e...

Embodiment 2

[0057] This embodiment is another implementation of the spiral thin film element. Preferably, as an implementable manner, see Figure 4 , the spiral membrane element takes the drawing liquid inlet connection pipe 4 as the axis, and the film layer composed of the forward osmosis membrane 1, the drawing liquid diversion material 2 and the feed liquid diversion material 3 is closely attached to the suction liquid inlet connection pipe 4 spirally wound into a third cylindrical winding body, and the end of the film layer is embedded in the drawing liquid outlet connector 5 . In this embodiment, only one cylindrical wound body is formed, and no wound body is formed on the outside of the drawing liquid outlet connecting pipe, so that the formed spiral membrane element is small in size and easy to install.

[0058] Preferably, as an implementable manner, see Figure 4 , the sealing part in this embodiment includes an outer sealing part 6 and an inner sealing part, and the outer seal...

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Abstract

The invention provides a spiral thin film element and a preparation method thereof. The thin film element comprises a cylindrical winding body and a sealing part, wherein the cylindrical winding body comprises two liquid traps and a thin film layer; the thin film layer comprises a forward osmotic thin film, an absorbed liquid flow channel is formed in one side of the forward osmotic thin film, an absorbed liquid guide material is arranged in the absorbed liquid flow channel, a supplied liquid flow channel is formed in the other side of the forward osmotic thin film, and a supplied liquid guide material is arranged in the supplied liquid flow channel; and the absorbed liquid flow channel of the spiral thin film element is a straight-line type. Because the supplied liquid flow channel in the spiral thin film element disclosed by the invention is straight-line type and has no flow-channel dead angle, the effective filtration area of the thin film cannot be reduced, and the filtration efficiency of the thin film element cannot be reduced, therefore, the area of the forward osmotic thin film can be fully used, and the water treatment can be stably performed for a long time.

Description

technical field [0001] The invention belongs to the technical field of membrane separation equipment, and in particular relates to a spiral membrane element with large flux and applicable to relatively high water pressure and a preparation method thereof. Background technique [0002] In the prior art, seawater desalination, ultrapure water and various industrial water are generally obtained by using spiral membranes of reverse osmosis membrane (RO membrane), nanofiltration membrane (NF membrane) and ultrafiltration membrane (UF membrane) Components, methods for separating ions or low molecular components from raw water. The particularity of the working principle of the forward osmosis membrane (FO membrane) used in the forward osmosis technology makes the structure of the FO membrane element different from that of the RO membrane element. [0003] Forward osmosis technology uses the osmotic pressure generated by high-concentration brine to drive pure water from the raw wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/10
Inventor 段伟王效宁蔡军刚
Owner TRITECH QINGDAO MEMBRANE IND CO LTD
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