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CN-121972010-A - Commercial spiral wound membrane element structure and winding method

CN121972010ACN 121972010 ACN121972010 ACN 121972010ACN-121972010-A

Abstract

The invention relates to the technical field of reverse osmosis membrane filter elements, in particular to a commercial spiral wound membrane element structure and a winding method. The membrane element structure is rolled by the method. The method comprises the steps of respectively obtaining the main water producing component and the byproduct water component, respectively arranging the byproduct water components between each main folding membrane and the adjacent main water producing diversion cloth, sequentially far away from the main water producing pipe in a staggered mode, taking the main water producing pipe as a winding starting point, winding the main folding membrane along the length direction of the main water producing diversion cloth, and sequentially and cooperatively winding the byproduct water components in the staggered mode until the commercial spiral wound membrane element structure is obtained. The invention can improve the filling density, the water yield and the water yield efficiency of the membrane element.

Inventors

  • NING LIANGLIANG
  • HU QUNHUI
  • TANG YIZHI
  • ZHENG HEQI
  • LIANG BEIMING

Assignees

  • 湖南澳维科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. The commercial spiral wound membrane element structure is characterized by comprising a main water producing component (1) and a plurality of byproduct water components (2); The main water production assembly (1) comprises a main water production pipe (1.1), a main water production diversion cloth (1.2) and a main folding membrane (1.3), wherein the main water production pipe (1.1) is arranged along one wide end of the main water production diversion cloth (1.2), the main folding membrane (1.3) is paved at least one time of C 1 away from the main water production pipe (1.1) in the length direction of the main water production diversion cloth (1.2), and C 1 represents the circumference length corresponding to the outer diameter of the main water production pipe (1.1); The number of the main folding diaphragms (1.3) is the same as that of the byproduct water assemblies (2), and the main folding diaphragms (1.3) are sequentially staggered and layered on the main water production diversion cloth (1.2) and are sequentially far away from the main water production pipe (1.1); the byproduct water components (2) are respectively arranged between each main folding diaphragm (1.3) and the adjacent main water production diversion cloth (1.2), and each byproduct water component (2) is sequentially far away from the main water production pipe (1.1) in a staggered manner; Each byproduct water assembly (2) comprises a byproduct water pipe (2.1), a byproduct water guide cloth (2.2) and a secondary folding membrane (2.3), wherein the byproduct water pipe (2.1) is arranged along one wide end of the byproduct water guide cloth (2.2), the secondary folding membrane (2.3) is paved at least one time of C 2 away from the byproduct water pipe (2.1) in the length direction of the byproduct water guide cloth (2.2), and C 2 represents the circumference length corresponding to the outer diameter of the byproduct water pipe (2.1); The commercial spiral wound membrane element structure is formed by combining and winding the main water producing component (1) and the byproduct water components (2).
  2. 2. A commercial spiral wound membrane element structure according to claim 1, characterized in that the offset distance between each adjacent two of the main folded membranes (1.3) is a, wherein a is the ratio of the circumference corresponding to the outer diameter of the main water producing tube (1.1) to the total number of the main folded membranes (1.3).
  3. 3. A commercial spiral wound membrane element structure according to claim 1, characterized in that the offset distance between each adjacent two of said by-product water modules (2) is B, wherein B is the ratio of the circumferential length of the circumscribed circle formed by the outer walls of all of said by-product water tubes (2.1) to the total number of said by-product water tubes (2.1).
  4. 4. A commercial spiral wound membrane element structure according to claim 1, wherein the number of the by-product water components (2) is even and equal to or greater than four.
  5. 5. The commercial spiral wound membrane element structure according to any one of claims 1 to 4, wherein the main folding membrane (1.3) comprises a first concentrated water separating net and a first membrane, the first membrane is arranged in a staggered and folded mode and forms a first staggered and folded membrane for accommodating the first concentrated water separating net, the length of the first concentrated water separating net is equal to that of a short membrane of the first staggered and folded membrane, the short membrane of the first staggered and folded membrane is sequentially connected with the adjacent main water producing water guiding cloth (1.2) and the adjacent byproduct water component (2), and a long membrane of the first membrane is connected with the adjacent main water producing water guiding cloth (1.2).
  6. 6. The spiral wound membrane element structure of claim 5, wherein a first sealant wire is applied to each of the three open ends of the first offset folded membrane sheet, and wherein each of the first sealant wires defines a U-shaped structure.
  7. 7. The commercial spiral wound membrane element structure according to claim 6, wherein the secondary folded membrane (2.3) comprises a second concentrated water screen and a second membrane, the second membrane is arranged in a staggered and folded mode and forms a second staggered and folded membrane for accommodating the second concentrated water screen, the length of the second concentrated water screen is equal to that of a short membrane of the second staggered and folded membrane, the short membrane of the second staggered and folded membrane is connected with the byproduct water diversion cloth (2.2) adjacent to the short membrane, and a long membrane of the second staggered and folded membrane is connected with the main folded membrane (1.3) adjacent to the short membrane.
  8. 8. The spiral wound membrane element structure of claim 7, wherein a second sealant wire is applied to each of the three open ends of the second dislocated folded membrane sheet, and wherein each of the second sealant wires defines a U-shaped structure.
  9. 9. The commercial spiral wound membrane element structure of claim 7, wherein the sealant employed by each of the first sealant threads and each of the second sealant threads is polyurethane sealant.
  10. 10. A method of rolling a commercial spiral wound membrane element structure according to claim 9, comprising: s1, respectively obtaining the main water producing component (1) and the byproduct water component (2); The main water producing guide cloth (1.2) is stuck and arranged along one wide end of the main water producing guide cloth (1.1), then the main water producing guide cloth (1.2) is wound at least one circle along the main water producing pipe (1.1), and then each main folding membrane (1.3) is sequentially staggered and layered on the main water producing guide cloth (1.2) and is sequentially far away from the main water producing pipe (1.1) to obtain the main water producing assembly (1), wherein the main water producing guide cloth (1.2) is arranged between every two adjacent main folding membranes (1.3); Pasting the byproduct water pipe (2.1) along one wide end of the second byproduct water diversion cloth (2.2), then winding the byproduct water diversion cloth (2.2) at least one circle along the byproduct water pipe (2.1), and then paving the auxiliary folding membrane (2.3) on the byproduct water diversion cloth (2.2) to obtain the byproduct water assembly (2); S2, arranging the byproduct water components (2) between each main folding diaphragm (1.3) and the adjacent main water production diversion cloth (1.2) respectively, wherein each byproduct water component (2) is sequentially far away from the main water production pipe (1.1) in a staggered manner; And S3, taking the main water producing pipe (1.1) as a winding starting point, winding the main folding membrane (1.3) along the length direction of the main water producing diversion cloth (1.2), and sequentially linking, winding and misplacing each byproduct water component (2) until the commercial spiral wound membrane element structure is obtained.

Description

Commercial spiral wound membrane element structure and winding method Technical Field The invention relates to the technical field of reverse osmosis membrane filter elements, in particular to a commercial spiral wound membrane element structure and a winding method. Background The membrane technology is widely applied to the field of water treatment because of the advantages of simple flow, high filling density, good effluent quality, easy automation operation, convenient maintenance and the like. Among them, the spiral wound membrane element has become the mainstream choice in commercial filtration devices because of its compact structure, high packing density of membrane area and low cost. In commercial scenes such as market drinking water, community purified water, office drinking water, catering industry and the like, water production equipment is generally faced with the contradiction that the installation space is limited but the water yield requirement is large. The limited installation space, among other things, places severe restrictions on the choice of size for commercial spiral wound membrane elements, with the largest specification selected typically being a 4040 model with a diameter of 4 inches (about 0.1 meters) and a length of 40 inches (about 1.016 meters). However, the packing density of the 4040 model film element (about 1146-1528 m 2/m3) is instead lower than that of the smaller diameter 1812 model film element (about 1495-2315 m 2/m3). It is contemplated that the packing density of a membrane element refers to the effective membrane area contained within a unit volume of the membrane element, typically in units of m 2/m3. The packing density of the membrane element directly reflects the space utilization efficiency of the membrane element, and the higher the numerical value is, the more filtering area can be provided under the same external dimension, and the improvement of the water production capacity, namely the improvement of the water yield is facilitated. Thus, analysis in terms of the packing density of the membrane element, the packing density of the 4040 model membrane element was less than the 1812 model membrane element, resulting in a water yield of the 4040 model membrane element of less than the 1812 model membrane element. The main reason for this is: In the practical commercial scene of the membrane element, not only the limited installation space and the large water yield requirement are considered, but also the high water yield requirement is considered, in order to increase the water yield of the membrane element under the limited commercial installation space, the diameter of the membrane element (such as the length of a membrane) is often required to be increased to increase the filling density of the membrane element, however, when the diameter of the membrane element is increased, if the high water yield requirement is required to be maintained, the traditional scheme adopts a thicker water-producing diversion cloth and a central tube with a larger diameter to reduce the pressure on the water producing side, but the pressure directly causes the decrease of the filling density of the membrane element, but is lower than that of a membrane element with a small diameter, otherwise, if the high water yield requirement is not considered, the length of the membrane element is increased to increase the filling density of the membrane element, and the water yield is further increased, and the pressure loss of a water producing channel is obviously increased due to the overlong membrane, so that the net driving pressure is reduced, and the water yield is seriously reduced. According to analysis, the prior commercial membrane element has the problems that 1) the filling density of the membrane element is improved by simply increasing the length of a membrane, the water yield can be improved, but the water yield is seriously reduced, and 2) the pressure on the water production side is reduced by adopting thicker water production diversion cloth and a central tube with larger diameter, the water yield is improved, but the filling density of the membrane element is reduced, and the water yield is reduced. Therefore, it is necessary to provide a structure and a rolling method for a commercial spiral wound membrane element to solve the above-mentioned two difficult problems of the commercial membrane element. Disclosure of Invention The invention aims to provide a commercial spiral wound membrane element structure and a winding method, and the specific technical scheme is as follows: in a first aspect, the present invention provides a commercial spiral wound membrane element structure comprising a main water-producing assembly and a plurality of byproduct water assemblies; The main water producing component comprises a main water producing pipe, main water producing guide cloth and a main folding membrane, wherein the main water producing pipe is arranged along one wide end of