CN210752126U - Roll type reverse osmosis membrane element and water purification system - Google Patents

Abstract

The utility model relates to a formula of book reverse osmosis membrane element and water purification system, formula of book reverse osmosis membrane element includes the dense water pipe and all rolls up the pure water conservancy diversion cloth of system on the dense water pipe, reverse osmosis diaphragm and the net that separates of intaking, reverse osmosis diaphragm openly fifty percent discount forms the raw water runner, it separates the net to intake and inserts and establish in the raw water runner, the opening orientation dense water pipe that reverse osmosis diaphragm fifty percent discount formed, and opening and dense water pipe intercommunication, the long limit of raw water runner is sealed for the part, the one end near the hem forms the raw water import, reverse osmosis diaphragm after the fifty percent discount divide into range upon range of first diaphragm and second diaphragm, pure water conservancy diversion cloth is range upon range of the reverse side at first diaphragm, the minor face and the dense water union coupling of pure water conservancy diversion cloth, two long. Raw water flows along the long edge of the raw water flow channel, and is subjected to osmotic filtration, so that the water production efficiency is high. The flow speed of the concentrated water in the raw water flow channel is higher at the position close to the concentrated water pipe, and the concentration polarization phenomenon at the concentrated water side is effectively relieved.

Description

Roll type reverse osmosis membrane element and water purification system

Technical Field

The utility model relates to a water purification field especially relates to a formula of book reverse osmosis membrane element and water purification system.

Background

The roll type reverse osmosis membrane element forms a water purification element by rolling the water inlet separation net, the reverse osmosis membrane and the pure water diversion cloth on the central water production pipe. By utilizing the permeation function of the reverse osmosis membrane, water molecules in the raw water permeate through the reverse osmosis membrane under the pressurization condition and are gathered at the pure water side to form pure water, the raw water gradually forms concentrated water at the concentrated water side, finally, the concentrated water flows out from the concentrated water outlet, and the pure water flows out from the pure water outlet. And the concentration of the concentrated water close to the concentrated water side in the raw water flow channel is increased along with the flowing of the raw water to the concentrated water outlet in the raw water flow channel. The concentration polarization phenomenon of the common reverse osmosis membrane element on the concentrated water side is obvious, and the service life of the element is short.

SUMMERY OF THE UTILITY MODEL

Therefore, a roll-type reverse osmosis membrane element and a water purification system are needed to improve the concentration polarization phenomenon on the concentrated water side in the raw water flow channel and prolong the service life.

A roll type reverse osmosis membrane element, which comprises a concentrated water pipe, and a pure water diversion cloth, a reverse osmosis membrane and a water inlet separation net which are all rolled on the concentrated water pipe, the front surface of the reverse osmosis membrane is folded in half to form a raw water flow passage, the water inlet separation net is inserted in the raw water flow passage, an opening formed by folding the reverse osmosis membrane in half faces the concentrated water pipe, the opening is communicated with the concentrated water pipe, the long edge of the raw water flow passage is partially sealed, and a raw water inlet is formed at one end close to the folded edge, the folded reverse osmosis membrane is divided into a first membrane and a second membrane which are laminated, the pure water guide cloth is laminated on the reverse side of the first membrane, the short sides of the pure water flow guide cloth are connected with the concentrated water pipe, the two long sides of the first membrane and the short sides close to the concentrated water pipe are connected with the pure water flow guide cloth to form a pure water flow passage, and a pure water outlet of the pure water flow passage is located on the outer side face of the rolled reverse osmosis membrane element.

The scheme provides a roll type reverse osmosis membrane element, a raw water flow channel is formed by folding the front side of a reverse osmosis membrane in half, an opening formed by folding is towards a concentrated water pipe, the long edge part of the raw water flow channel is sealed, and a raw water inlet is formed at one end close to a folded edge. Therefore, after the pure water diversion cloth, the reverse osmosis membrane and the water inlet separation net are rolled on the concentrated water pipe. Raw water flows along the long edge of the raw water flow channel, and is subjected to osmotic filtration, so that the water production efficiency is high. And the position close to the concentrated water pipe, the flow speed of the concentrated water in the raw water runner is higher, and the phenomenon of concentration polarization at the concentrated water side is effectively relieved. And the pure water runner that forms between the reverse side of pure water conservancy diversion cloth with first diaphragm then is used for the conduction by the pure water that permeates in the raw water runner produced, just the pure water delivery port of pure water runner is located the lateral surface, and the pure water velocity of flow in the pure water runner of being close to the dense water pipe is higher relatively, has effectively alleviated the big problem of the pure water side backpressure of being close to dense water pipe department.

In one embodiment, one end of the water inlet separation net far away from the folded edge exceeds the second membrane, and the distance of the water inlet separation net exceeding the second membrane is not less than 0.5 cm.

In one embodiment, the distance between the water inlet separation net and the second membrane is 0.5 cm-3 cm.

In one embodiment, one end of the pure water guide cloth, which is far away from the concentrated water pipe, exceeds the first membrane, and the distance of the pure water guide cloth exceeding the first membrane is not less than 0.5 cm.

In one embodiment, the distance between the pure water diversion cloth and the first membrane is 0.5 cm-3 cm.

In one embodiment, the pure water guide cloth, the reverse osmosis membranes and the water inlet separation net form two or more reverse osmosis membrane groups, the reverse osmosis membrane groups are stacked, the short sides and the long sides of the second membranes of the reverse osmosis membrane groups are connected with the pure water guide cloth of the adjacent reverse osmosis membrane group, and a pure water channel with a pure water outlet positioned on the outer side face of the reverse osmosis membrane element is formed.

In one embodiment, an outer membrane group is positioned between the adjacent reverse osmosis membrane groups, an inner membrane group is positioned between the adjacent reverse osmosis membrane groups, and the inner membrane group is arranged in a staggered manner relative to the outer membrane group along the direction far away from the concentrated water pipe.

In one embodiment, the inner membrane sheet group is staggered from the outer membrane sheet group in a direction away from the concentrated water pipe by a distance L, the outer circumference of the concentrated water pipe is D, and the number of the reverse osmosis membrane sheet groups is n, so that L is D/n.

In one embodiment, the radial thickness of an end face formed by rolling each reverse osmosis membrane group on the concentrated water pipe is R, the position on the end face needing to be sealed is a sealing part, the position on which the raw water inlet is formed is an outer edge part, the outer edge part is arranged outside the sealing part in a surrounding manner, and the radial thickness of the sealing part is R, wherein R/R is greater than or equal to 2/3 and less than or equal to 1.

A water purification system comprises the roll-type reverse osmosis membrane element.

According to the scheme, the roll type reverse osmosis membrane element in any one embodiment is arranged in the water purification system, so that the concentration polarization phenomenon on the concentrated water side is effectively relieved while the water production efficiency is improved, and the service life is prolonged.

Drawings

FIG. 1 is a schematic view showing a configuration of a rolled reverse osmosis membrane element according to the present embodiment when partially unfolded;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural diagram of the water flow direction of the roll-type reverse osmosis membrane element according to the present embodiment;

FIG. 4 is a diagram of a fully expanded flow state of a reverse osmosis membrane stack in the spiral wound reverse osmosis membrane element of FIG. 3;

FIG. 5 is an isometric view of the rolled reverse osmosis membrane element shown in FIG. 1 fully deployed;

FIG. 6 is a front view of the roll-type reverse osmosis membrane element shown in FIG. 5;

FIG. 7 is a top view of the rolled reverse osmosis membrane element shown in FIG. 5;

FIG. 8 is an end view of a reverse osmosis membrane stack in a reverse osmosis membrane element according to this embodiment;

FIG. 9 is a schematic structural view of a reverse osmosis membrane sheet of the rolled reverse osmosis membrane element of the present embodiment rolled on a concentrate pipe;

fig. 10 is a flow chart of a method for manufacturing the roll type reverse osmosis membrane element according to the embodiment.

Description of reference numerals:

10. a roll-type reverse osmosis membrane element; 11. a concentrated water pipe; 111. water passing holes; 12. a reverse osmosis membrane set; 121. pure water diversion cloth; 122. a reverse osmosis membrane; 1221. folding edges; 1222. a long side; 1223. a first diaphragm; 1224. a second diaphragm; 123. a water inlet separation net; 124. a raw water flow passage; 1241. a raw water inlet; 125. an outer side surface; 126. a pure water flow passage; 1261. a pure water outlet; 127. a sealing part; 128. an outer edge portion; 13. short edge glue lines; 14. and (5) long-edge glue lines.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

As shown in fig. 1, in one embodiment, there is provided a rolled reverse osmosis membrane element 10 including a concentrate pipe 11, and a pure water guide cloth 121, a reverse osmosis membrane 122 and a water inlet separation net 123 all rolled on the concentrate pipe 11. As shown in fig. 2, the reverse osmosis membrane 122 is folded in half on the front to form a raw water channel 124, and the water inlet screen 123 is inserted into the raw water channel 124. As shown in fig. 5 and 6, the opening formed by folding the reverse osmosis membrane 122 is toward the concentrated water pipe 11, and the opening is communicated with the concentrated water pipe 11, so that the folded edge 1221 formed by folding is away from the concentrated water pipe 11.

As shown in fig. 4, the long side 1222 of the raw water flow passage 124 is partially sealed and forms a raw water inlet 1241 at an end near the folded edge 1221. After the pure water guiding cloth 121, the reverse osmosis membrane 122 and the water inlet separation net 123 are rolled on the concentrated water pipe 11, as shown in fig. 3, the raw water inlet 1241 is located at a position on the end surface close to the outer side surface 125. As shown in fig. 4, in the filtering process, the raw water traveling path is the long side 1222 of the reverse osmosis membrane 122, the length of the raw water flow passage 124 is increased, and the water production efficiency is high. In addition, the position close to the concentrated water pipe 11, the flow speed of the concentrated water in the raw water channel 124 is high, so that the concentration polarization phenomenon on the concentrated water side can be effectively relieved, and the service life is prolonged.

The front surface of the reverse osmosis membrane 122 herein refers to a surface through which water molecules permeate in a high pressure environment, that is, a surface of the reverse osmosis membrane 122 on which the raw water flow passage 124 is formed. Correspondingly, the other side of the reverse osmosis membrane 122 is the opposite side.

The outer side 125 of the reverse osmosis membrane element 10 herein refers to an outer side formed by the pure water guide cloth 121, the reverse osmosis membrane 122 and the water inlet separation net 123 after the pure water guide cloth 121, the reverse osmosis membrane 122 and the water inlet separation net 123 are rolled on the concentrated water pipe 11.

The short side is a side distributed along the axial direction of the concentrate pipe 11, and the long side 1222 is a side spirally wound on the concentrate pipe 11 along the circumferential direction, that is, the long side 1222 is a side distributed along the advancing direction of the water flow during water production. Generally, after the reverse osmosis membrane 122, the pure water guide cloth 121 and the water inlet screen 123 are wound on the concentrate pipe 11 for a plurality of turns, the long side 1222 is larger than the short side, so that the efficiency of filtering the raw water before the long side 1222 is high.

Specifically, the long side 1222 of the raw water flow passage 124 is partially sealed by coating and sealing the end surface with glue after the water inlet screen 123, the reverse osmosis membrane 122 and the pure water guide cloth 121 are rolled on the concentrated water pipe 11, or by combining glue and a sealing end cap.

For example, a seal end cap is provided on the end face, and a raw water port is provided on the seal end cap at a position corresponding to the raw water inlet 1241 for water to pass through. The above partial sealing is achieved by applying glue between the end closure and the above-mentioned end face.

As shown in fig. 8, assuming that the radial thickness of the end surface of the reverse osmosis membrane stack 12 including the pure water guide cloth 121, the reverse osmosis membrane 122 and the water inlet mesh 123 is R, the position on the end surface where sealing is required is a sealing portion 127, and the position where the raw water inlet 1241 is formed is an outer edge portion 128, the outer edge portion 128 is surrounded outside the sealing portion 127, and if the radial thickness of the sealing portion 127 is R, R/R is 2/3 ≦ R < 1.

As shown in fig. 4, the length of the long side 1222 of the raw water channel 124 in the circumferential direction is L, the length of the raw water inlet 1241 in the circumferential direction is h, and h/L is greater than or equal to 1/15 and less than or equal to 1/2. Therefore, the size of the raw water inlet 1241 is limited, if the length of the raw water inlet 1241 is too large, the length of the raw water flow channel 124 is reduced, and the reliability of the connection between the pure water guide cloth 121 corresponding to the raw water inlet 1241 and the reverse osmosis membrane 122 due to the high-pressure environment of the raw water inlet 1241 threatens, so that the size of the raw water inlet 1241 needs to be reasonably arranged, the requirement of water production efficiency is met, and the reliability of the filter element is also guaranteed.

As shown in fig. 5 and 6, the reverse osmosis membrane 122 after being folded in half is divided into a first membrane 1223 and a second membrane 1224 which are stacked, the pure water guide cloth 121 is stacked on the reverse side of the first membrane 1223, the short side of the pure water guide cloth 121 is connected to the concentrated water pipe 11, and both the two long sides 1222 of the first membrane 1223 and the short side near the concentrated water pipe 11 are connected to the pure water guide cloth 121, thereby forming a pure water flow passage 126 in which a pure water outlet 1261 shown in fig. 3 is located on the outer side surface 125 of the reverse osmosis membrane element.

As shown in fig. 3, pure water formed near the raw water inlet 1241 can flow out of the pure water passage 126 from the pure water outlet 1261 relatively quickly, and the flow rate of pure water in the pure water passage 126 near the concentrated water pipe 11 is relatively high, which effectively alleviates the problem of large back pressure on the pure water side near the concentrated water pipe 11.

Further, in one embodiment, as shown in fig. 5 and 6, the end of the water inlet screen 123 far from the folded edge 1221 extends beyond the second membrane 1224, and the distance that the water inlet screen 123 extends beyond the second membrane 1224 is not less than 0.5 cm.

The part of the water inlet screen 123 beyond the second diaphragm 1224 contacts the concentrated water pipe 11, so that the concentrated water in the raw water channel 124 is better guided into the concentrated water pipe 11, and the situation of scaling caused by poor flow of the concentrated water at a position close to the concentrated water pipe 11 is avoided.

Further, in one embodiment, the distance that the water inlet screen 123 extends beyond the second diaphragm 1224 is between 0.5cm and 3 cm. Therefore, the smooth flowing of the concentrated water at the concentrated water side is ensured, and the situation that the length of the raw water channel 124 is reduced under the condition that the length of the reverse osmosis membrane 122 is fixed is avoided, or the situation that the volume of the whole roll type reverse osmosis membrane element 10 is overlarge to ensure that the length of the raw water channel 124 reaches a certain value is avoided.

Further, in one embodiment, an end of the pure water guiding cloth 121 far from the concentrated water pipe 11 extends beyond the first membrane 1223, and a distance of the pure water guiding cloth 121 extending beyond the first membrane 1223 is not less than 0.5 cm. Guarantee that pure water outlet 1261 is in open state all the time, improve system water efficiency.

Similarly, in one embodiment, the distance between the pure water guiding cloth 121 and the first membrane 1223 is 0.5cm to 3 cm. Not only is the pure water outlet 1261 always in an open state ensured, but also the situation that the volume of the roll type reverse osmosis membrane element 10 is overlarge is avoided.

Further, as shown in fig. 1 and 2, in one embodiment, the pure water guide cloth 121, the reverse osmosis membrane 122 and the water inlet separation net 123 form a reverse osmosis membrane group 12. The number of the reverse osmosis membrane groups 12 is two or more, the reverse osmosis membrane groups 12 are stacked, and the short side and the long side 1222 of the second membrane 1224 of the reverse osmosis membrane group 12 are both connected to the pure water guiding cloth 121 of the adjacent reverse osmosis membrane group 12, so as to form a pure water flow channel 126 in which the pure water outlet 1261 is located on the outer side 125 of the reverse osmosis membrane element.

Finally, a plurality of reverse osmosis membrane groups 12 are wound around the concentrated water pipe 11, and as shown in fig. 1, 2 and 9, a plurality of spiral raw water flow passages 124 and pure water flow passages 126 are wound around the concentrated water pipe 11.

Further, in one embodiment, as shown in fig. 5 and 6, an outer membrane group is located between adjacent reverse osmosis membrane groups 12, an inner membrane group is located between adjacent reverse osmosis membrane groups, and the inner membrane group is offset with respect to the outer membrane group in a direction away from the concentrated water pipe 11. The outer layer and the inner layer are referred to as an inner-outer coating relation during rolling.

Therefore, the raw water channels 124 in the reverse osmosis membrane groups 12 can be reliably communicated with the concentrated water pipe 11. Particularly, as shown in fig. 4 and 5, when the water through hole 111 is formed in the concentrated water pipe 11, the raw water flow passage 124 communicates with the concentrated water pipe 11 through the water through hole 111. The raw water channels 124 in each reverse osmosis membrane group 12 can be respectively communicated with the corresponding water through holes 111 by the staggered arrangement. The situation that the outlets of the raw water channels 124 communicated with the concentrated water pipe 11 are gathered at one position and the concentrated water cannot be discharged is avoided. And the dislocation arrangement also ensures that the whole radial thickness of the reverse osmosis membrane group 12 is gradually changed when the reverse osmosis membrane group is rolled on the concentrated water pipe 11.

Specifically, in one embodiment, the inner membrane sheet group is displaced from the outer membrane sheet group by a distance L in a direction away from the concentrated water pipe 11, the outer circumference of the concentrated water pipe 11 is D, and the number of the reverse osmosis membrane sheet groups 12 is n, so that L is D/n. Namely, the openings corresponding to the concentrated water pipes 11 on the raw water channels 124 are uniformly distributed on the outer surfaces of the concentrated water pipes 11, so that the water production efficiency is improved.

Further, in another embodiment, a water purification system is provided, comprising the rolled reverse osmosis membrane element 10 according to any of the above embodiments. The concentration polarization phenomenon at the concentrated water side is effectively relieved while the water production efficiency is improved, so that the service life is prolonged.

Further, as shown in fig. 10, in yet another embodiment, a method for manufacturing a roll-type reverse osmosis membrane element is provided, which comprises the following steps:

the front face of the reverse osmosis membrane 122 is folded in half, the water inlet separation net 123 is inserted between the opposite front faces, and after folding in half, the reverse osmosis membrane 122 is divided into a first membrane 1223 and a second membrane 1224 by taking the folded edge 1221 as a boundary;

laminating a pure water guide cloth 121 under the first membrane 1223, and applying glue between the pure water guide cloth 121 and the reverse side of the first membrane 1223, so that a pure water flow passage 126 having a pure water outlet 1261 at a folded edge 1221 of the reverse osmosis membrane 122 is formed between the first membrane 1223 and the pure water guide cloth 121;

connecting the short side of the pure water guide cloth 121 far away from the pure water outlet 1261 with the concentrated water pipe 11, and then rolling the adhered reverse osmosis membrane 122, the water inlet separation net 123 and the pure water guide cloth 121 on the concentrated water pipe 11, so that the outlet of the rolled raw water flow passage 124 faces the concentrated water pipe 11, and the pure water outlet 1261 of the pure water flow passage 126 is positioned on the outer side surface 125;

the raw water flow passage 124 is partially sealed by applying glue to the end surface of the rolled reverse osmosis membrane 122 and the water inlet screen 123, and the glue application position is a portion close to the concentrated water pipe 11, so that a raw water inlet 1241 is formed on the end surface close to the outer side surface 125.

Therefore, in the filtering process, the advancing path of the raw water is the long edge 1222, the water production effect is improved, the flow rates of the concentrated water and the pure water at the position close to the concentrated water pipe 11 are high, the concentration polarization phenomenon of the concentrated water side is relieved, and the problem of high back pressure of the pure water side close to the concentrated water pipe 11 is solved. Thereby prolonging the service life of the roll type reverse osmosis membrane element 10 manufactured by the method.

Further, in one embodiment, the method for manufacturing the rolled reverse osmosis membrane element further comprises the following steps: when the reverse osmosis membrane 122, the water inlet separation net 123 and the pure water guide cloth 121 are rolled on the concentrated water pipe 11, the innermost second membrane 1224 is connected to the outermost first membrane 1223 to form a pure water flow passage 126 with a pure water outlet located at the outer side surface, and the outermost pure water guide cloth 121 is located in the pure water flow passage 126.

Therefore, pure water can be formed in the pure water flow passage 126 formed by the innermost second membrane 1224 and the outermost first membrane 1223 in the water production process, and the utilization rate of the whole membrane is improved.

If there is only one reverse osmosis membrane group 12, the above innermost second membrane 1224 and the outermost first membrane 1223 are formed by folding the same reverse osmosis membrane 122. If there are two or more reverse osmosis membrane modules 12, as shown in fig. 6, the second membrane 1224 located at the innermost layer is the second membrane 1224 located at the uppermost layer after stacking, and the first membrane 1223 located at the outermost layer is the first membrane 1223 located at the lowermost layer after stacking.

Specifically, in one embodiment, as shown in fig. 5 and 7, the position for applying glue at the short side of the first membrane 1223 is a short side pasting position, and the distance between the short side pasting position and the side of the first membrane 1223 opposite to the concentrated water pipe 11 is 1cm to 3 cm. The reliability of connection is ensured, and meanwhile, the condition that glue overflows after being rolled is avoided. The reverse osmosis membrane 122 above the uppermost pure water guide cloth 121 in fig. 5 and 7 is not shown, and the glue line 13 on the short side of the pure water guide cloth 121 in fig. 5 and 7 is a glue line formed by applying glue on the gluing position of the short side of the first membrane 1223 in the reverse osmosis membrane 122, which is not shown.

Similarly, in one embodiment, as shown in fig. 7, the position for applying glue on the long side 1222 of the first film sheet 1223 is a long-side pasting position, and the distance between the long-side pasting position and the side edge of the long side 1222 of the first film sheet 1223 is 1cm to 3 cm.

And the two ends of the short side pasting position are connected with the two long side pasting positions, so that a complete glue line as shown in fig. 5 and 7 is formed on the corresponding pure water guide cloth 121, and the sealing reliability is improved.

Further, in an embodiment, the glue line on the pure water guide cloth 121 along the long side 1222 is a long side glue line 14, as shown in fig. 7, one end of the long side glue line 14 away from the concentrated water pipe 11 extends out of the pure water guide cloth 121, and the length of the long side glue line 14 extending out of the pure water guide cloth 121 is not less than the circumference of the outer side 125 formed by the rolled pure water guide cloth 121. Therefore, the rolled long-side glue line 14 can rotate for one circle along the outer side surface 125, and the sealing reliability is further improved.

Of course, the long-side glue lines 14 corresponding to each pure water guide cloth 121 may extend out of the corresponding pure water guide cloth 121, or only the long-side glue lines 14 corresponding to the outermost pure water guide cloth 121 may extend out of the corresponding pure water guide cloth 121.

Further, in an embodiment, the number of the reverse osmosis membrane groups 12 is plural, the reverse osmosis membrane groups 12 are laminated and adhered, an inner membrane group is located at an inner layer in the adjacent reverse osmosis membrane groups 2, and an outer membrane group is located at an outer layer.

That is, after the plurality of reverse osmosis membrane groups 12 are laminated, the plurality of reverse osmosis membrane groups 12 are rolled on the concentrate pipe 11 as shown in fig. 9.

Further, when the inner membrane sheet group is laminated on the outer membrane sheet group, the inner membrane sheet group is disposed in a shifted manner with respect to the reverse osmosis membrane sheet group 12 in a direction away from the concentrated water pipe 11. The specific offset distance L may be set by the offset distance in the rolled reverse osmosis membrane element 10.

Specifically, in one embodiment, the steps of laminating and adhering the adjacent reverse osmosis membrane groups 12 are as follows:

the side of the pure water guiding cloth 121 of the inner membrane set opposite to the first membrane 1223 is adhered to the reverse side of the second membrane 1224 of the outer membrane set to form a pure water channel 126 with a pure water outlet 1261 on the outer side 125.

The glue applying position during the specific pasting can adopt the setting mode of the short edge pasting position and the long edge pasting position. Specifically, the distance between the short edge pasting position and the corresponding side edge of the first membrane 1223 opposite to the concentrated water pipe 11 is 1 cm-3 cm. The distance between the long-edge pasting position and the corresponding long edge 1222 side of the first membrane 1223 is 1 cm-3 cm.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a formula of book reverse osmosis membrane element, its characterized in that includes the dense water pipe and all rolls the pure water conservancy diversion cloth, reverse osmosis membrane and the net that separates of making on the dense water pipe, reverse osmosis membrane openly fifty percent discount forms the raw water runner, the net that separates of intaking is inserted and is established in the raw water runner, the opening orientation that reverse osmosis membrane fifty percent discount formed the dense water pipe, just the opening with dense water pipe intercommunication, the long limit of raw water runner is partly sealed and forms the raw water import near the one end of hem, reverse osmosis membrane after the fifty percent discount divide into first diaphragm and the second diaphragm of range upon range of, pure water conservancy diversion cloth range upon range of the reverse side of first diaphragm, the minor face of pure water diversion cloth with dense water union coupling, two long limits of first diaphragm with be close to the minor face of dense water pipe all with pure, and a pure water outlet of the pure water flow channel is positioned on the outer side surface of the rolled reverse osmosis membrane element.

2. The rolled reverse osmosis membrane element of claim 1, wherein an end of the water inlet spacer mesh remote from the fold exceeds the second membrane sheet, and the distance that the water inlet spacer mesh exceeds the second membrane sheet is not less than 0.5 cm.

3. The rolled reverse osmosis membrane element of claim 2, wherein the distance of the water inlet separation net beyond the second membrane sheet is 0.5cm to 3 cm.

4. The rolled reverse osmosis membrane element according to claim 1, wherein an end of the pure water guide cloth away from the concentrate pipe exceeds the first membrane, and a distance of the pure water guide cloth exceeding the first membrane is not less than 0.5 cm.

5. The rolled reverse osmosis membrane element according to claim 4, wherein the distance of the pure water guide cloth beyond the first membrane is 0.5cm to 3 cm.

6. The roll type reverse osmosis membrane element according to any one of claims 1 to 5, wherein the pure water guide cloth, the reverse osmosis membrane and the water inlet separation net form a reverse osmosis membrane group, the number of the reverse osmosis membrane groups is two or more, the reverse osmosis membrane groups are stacked, the short side and the long side of the second membrane of the reverse osmosis membrane group are connected with the pure water guide cloth of the adjacent reverse osmosis membrane group, and a pure water flow passage with a pure water outlet positioned on the outer side surface of the reverse osmosis membrane element is formed.

7. The roll type reverse osmosis membrane element according to claim 6, wherein an outer membrane group is positioned between the adjacent reverse osmosis membrane groups, an inner membrane group is positioned between the adjacent reverse osmosis membrane groups, and the inner membrane group is arranged in a staggered manner relative to the outer membrane group along a direction away from the concentrated water pipe.

8. The spiral wound reverse osmosis membrane element of claim 7, wherein the inner membrane sheet group is offset from the outer membrane sheet group by a distance L in a direction away from the concentrate pipe, the outer circumference of the concentrate pipe is D, the number of reverse osmosis membrane sheet groups is n, and then L is D/n.

9. The rolled reverse osmosis membrane element according to claim 6, wherein the radial thickness of the end face formed by rolling each reverse osmosis membrane group on the concentrated water pipe is R, the position on the end face needing sealing is a sealing part, the position forming the raw water inlet is an outer edge part, the outer edge part is arranged outside the sealing part in a surrounding manner, and the radial thickness of the sealing part is R, 2/3R/R < 1.

10. A water purification system comprising the roll type reverse osmosis membrane element of any one of claims 1 to 9.

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