阅读说明：本技术 用于进行正向渗透处理的方法和管状膜 (Method and tubular membrane for carrying out forward osmosis treatment ) 是由 金伯尔·塞巴斯蒂安·勒洛夫斯 冈瑟·比斯勒 皮奥特·爱德华·德卢戈莱茨基 于 2019-07-05 设计创作，主要内容包括：本发明涉及一种用于采用正向渗透工艺处理流体的方法,该方法包括以下步骤：提供一个或更多个管状膜,其中管状膜包括：非织造材料的管状基底层,其在管状膜的外侧上并且形成管状膜的外壳并为进料流提供管腔；在管状膜的管腔侧上的聚合物衬底层,聚合物衬底层包括三个区域,所述三个区域包括聚合物衬底层被部分地侵入到管状基底层中的区域、具有开放的大空隙结构的区域和具有不对称泡沫层的区域,其中被部分地侵入的区域形成中间层；和在聚合物衬底层上的功能性顶层；并且其中管状基底层包括纵向焊缝；提供穿过管腔的进料流,并且在管状膜的外壳侧上提供抽取溶液；以及用膜处理进料流。(The present invention relates to a method for treating a fluid using a forward osmosis process, the method comprising the steps of: providing one or more tubular membranes, wherein the tubular membranes comprise: a tubular base layer of nonwoven material on the outside of the tubular membrane and forming the outer shell of the tubular membrane and providing a lumen for the feed stream; a polymeric substrate layer on the luminal side of the tubular membrane, the polymeric substrate layer comprising three regions including a region where the polymeric substrate layer is partially invaded into the tubular base layer, a region having an open large void structure, and a region having an asymmetric foam layer, wherein the partially invaded region forms an intermediate layer; and a functional top layer on the polymeric substrate layer; and wherein the tubular substrate layer comprises a longitudinal weld; providing a feed stream through the lumen and providing a draw solution on the shell side of the tubular membrane; and treating the feed stream with a membrane.)

1. A method for treating a fluid using a forward osmosis process, the method comprising the steps of:

providing one or more tubular membranes, wherein the tubular membranes comprise:

a tubular base layer of nonwoven material on the outside of the tubular membrane and forming a shell of the tubular membrane and providing a lumen for a feed stream;

a polymeric substrate layer on the luminal side of the tubular membrane, the polymeric substrate layer comprising three regions including a region where the polymeric substrate layer is partially invaded into the tubular base layer, a region having an open large void structure, and a region having an asymmetric foam layer, wherein the partially invaded region forms an intermediate layer; and

a functional top layer on the polymeric substrate layer; and is

Wherein the tubular base layer comprises a longitudinal weld;

providing the feed stream through the lumen and providing a draw solution on the shell side of the tubular membrane; and

treating the feed stream with the membrane.

2. A method according to claim 1, further comprising the step of cleaning the membranes in a cleaning step comprising a reversal of flow and/or an adjustable and/or settable cross-flow rate and/or osmotic backwash.

3. The method according to claim 1 or 2, further comprising the steps of:

the feed stream is provided with a hydraulic pressure at a pressure in the range of 0-4 bar, preferably in the range of 0-2 bar, and most preferably in the range of 0-1 bar, wherein said hydraulic pressure on the feed side preferably exceeds the pressure on the withdrawal side.

4. A tubular membrane configured for forward osmosis processing, the tubular membrane comprising:

a tubular base layer of nonwoven material on the outside of the tubular membrane and forming a shell of the tubular membrane and providing a lumen for a feed stream;

a polymeric substrate layer on the luminal side of the tubular membrane, the polymeric substrate layer comprising three regions including a region where the polymeric substrate layer is partially invaded into the tubular base layer, a region having an open large void structure, and a region having an asymmetric foam layer, wherein the partially invaded region forms an intermediate layer; and

a functional top layer on the polymeric substrate layer; and is

Wherein the tubular substrate layer comprises a longitudinal weld seam.

5. The tubular film of claim 3 or 4, wherein functional polymer film layer comprises a polyamide-based layer on the polymer substrate layer.

6. The tubular film of claim 4 or 5, wherein the foam asymmetric layer of the polymeric substrate layer is integrally formed, and wherein the foam asymmetric layer is formed on top of a large void structured layer, wherein the large void structured layer is provided with a multitude of large voids having a length extending substantially in a radial direction of the tubular film.

7. The tubular membrane of claim 4, 5 or 6, wherein the tubular membrane is self-supporting.

8. The tubular film of any of the preceding claims 4-7 wherein the nonwoven substrate layer has a thickness of between 60g/m²-120 g/m²Preferably between 75g/m²-90 g/m²Between, most preferably about 85g/m²The weight of (c).

9. The tubular film of any of the preceding claims 4-8 wherein the nonwoven substrate layer has a thickness in the range of 50 for the tubular film, preferably in the range of 100, preferably in the film, and most preferably about 120 a thick.

10. The tubular film of any of the preceding claims 4-9, wherein the nonwoven substrate layer has a pressure differential measured at about 200Pa at 25L/m²/s-125L/m²In the range of/s, more preferably in the range of 40L/m²/s-100L/m²In the range of/s, and most preferably about 85L/m²Air permeability in/s.

11. The tubular membrane of any one of the preceding claims 4-10, wherein the polymeric substrate layer has a molecular weight cut-off in the range of 5-20 kDa, wherein the molecular weight cut-off is determined by filtration comprising polyethylene glycol.

12. The tubular film according to any one of the preceding claims 4-11, wherein the longitudinal weld seam has a width in the range of 0.5mm-2mm, more preferably in the range of 0.7mm-1.3 mm.

13. The inner diameter of the tubular membrane is preferably in the range of 3mm to 8mm, and more preferably in the range of 5mm to 7mm, most preferably about 5.5 mm.

14. The cross-section of the tubular membrane is annular shaped or oval shaped.

15. An apparatus configured for a forward osmosis process of a feed stream, the apparatus comprising a plurality of tubular membranes according to any of the preceding claims 4-14.

16. Use of a tubular membrane according to any of the preceding claims 4-14 in a forward osmosis (filtration) process.