CN113941256A - Formula of book film element is with producing water conservancy diversion net - Google Patents
Formula of book film element is with producing water conservancy diversion net Download PDFInfo
- Publication number
- CN113941256A CN113941256A CN202111340032.2A CN202111340032A CN113941256A CN 113941256 A CN113941256 A CN 113941256A CN 202111340032 A CN202111340032 A CN 202111340032A CN 113941256 A CN113941256 A CN 113941256A
- Authority
- CN
- China
- Prior art keywords
- net
- water
- layer
- membrane element
- water production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/08—Flow guidance means within the module or the apparatus
Abstract
The application discloses a water production flow guide net for a roll type membrane element, which comprises an upper layer and a lower layer which are arranged oppositely, wherein a middle flow passage layer is arranged between the upper layer and the lower layer, the upper layer and the lower layer respectively comprise a plurality of net wires which are staggered along the transverse direction and the warp direction and are used for supporting a membrane, the middle flow passage layer comprises a plurality of warp direction net wire groups which are arranged in parallel, and a flow passage groove is formed between any two adjacent warp direction net wire groups and is used for collecting and guiding fluid; the total thickness of the water-producing diversion net is 0.15-0.5 mm, the thicknesses of the upper layer and the lower layer are 1/3-1/2 of the total thickness, and the width of the warp-wise net wire group is 1-2 times of the width of the runner groove. The application can improve the bearing capacity of the water production flow guide net and ensure that the membrane element can bear the pressure of 80kgf/cm3The diaphragm can not be pressed down to the flow channel groove when the water inlet pressure condition is normal.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a water production flow guide net for a roll-type membrane element.
Background
The roll-type membrane is one of application forms of separation membranes in membrane water treatment equipment, is different from other membrane forms such as a hollow fiber membrane, a tubular membrane and a flat membrane, and is widely applied to reverse osmosis technology and nanofiltration technology due to the advantages of good pressure resistance, large filling area, difficulty in damage and the like.
Winding on the central water collecting pipe inside the high-pressure roll-type membrane element to form a roll-type membrane element
The roll type membrane product usually exists in the form of elements and comprises a central water collecting pipe, membrane sheets and a produced water diversion net, wherein the back surfaces of the two membrane sheets are oppositely arranged, the produced water diversion net is arranged between the two membrane sheets, and the combined membrane sheets and the produced water diversion net are wound on the central water collecting pipe. The water production flow guide net is a main part influencing the pressure resistance of the membrane element, and plays a key role in the roll-type membrane element, such as supporting the membrane and collecting and guiding fluid permeating from the front surface to the back surface of the membrane. When the membrane element prepared by the conventional water production flow guide net operates at high pressure, the membrane can sink into the flow channel of the water production flow channel net due to higher pressure, so that the flow channel is blocked, the permeation liquid can not be smoothly guided, and the water production efficiency of the membrane element is seriously influenced.
In order to solve the above problems, some technical improvements are made in the industry, for example, CN201711155527.1 discloses a seawater desalination reverse osmosis membrane element, which is characterized in that a thin non-woven fabric is sandwiched between a reverse osmosis membrane and the front surface of a flow guide cloth, so as to ensure that a flow channel of a flow guide net is not blocked. However, such a way of increasing the filling amount of the non-woven fabric leads to a decrease in the filling amount of the membrane sheet, thereby decreasing the effective membrane area of the membrane element and also decreasing the water production efficiency of the membrane element. The practical application effect of the improved scheme is poor.
In conclusion, designing a new water production flow guide net for a roll type membrane element with high pressure resistance grade is of great significance to the field.
Disclosure of Invention
The application aims to provide a water production flow guide net for a roll-type membrane element, which can normally run under the condition of high water inlet pressure. The technical scheme of the application is as follows:
the utility model provides a formula of book film element is with producing water diversion net, includes relative upper strata and the lower floor that sets up be equipped with middle runner layer between upper strata and the lower floor, upper strata and lower floor all include a plurality of along horizontal and warp direction staggered arrangement's net silk for support the diaphragm, middle runner layer includes a plurality of parallel arrangement's net silk group, forms the runner groove between two arbitrary adjacent net silk groups for collect and the water conservancy diversion the fluid.
In some specific embodiments, the total thickness of the water production diversion net is d, and d is more than or equal to 0.15mm and less than or equal to 0.5 mm.
In some specific embodiments, the upper and lower layers each have a thickness h2And h3And 1/3d is less than or equal to h2≤1/2d，1/3d≤h3≤1/2d。
In some specific embodiments, the runner channels are separated by groups of parallel aligned warp mesh.
In some embodiments, the width of the warp mesh group is l1The width of the runner groove is l2And l is2≤l1≤2×l2。
In some specific embodiments, the depth of the runner groove is h1And h is1≤l1。
In some embodiments, the transverse wires and the warp wires are arranged at a density that is not lower than 60 wires/inch in the upper layer and the lower layer.
In some specific embodiments, the transverse wires and the longitudinal wires are arranged at a density of 60-120 wires/inch.
The technical scheme provided by the application has at least the following beneficial effects:
the application provides a technical scheme can effectively improve the bearing capacity of water conservancy diversion net for the diaphragm is difficult to be collapsed to the runner groove of water conservancy diversion net in, keeps awayThe condition that the runner groove is blocked is avoided, the water production diversion net is applied to the roll type membrane element, the pressure resistance grade of the membrane element can be greatly improved, and the membrane element can be ensured to be capable of being pressed at 80kgf/cm3The normal operation is carried out under the condition of the water inlet pressure.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that other drawings may be derived from those drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a conventional water-producing diversion net in the prior art;
FIG. 2 is a sectional view of a water-producing flow guiding net for a roll-type membrane element provided in an embodiment of the present application;
in the figure: 1. upper layer, 2, lower layer, 3, middle runner layer, 4, runner groove.
Detailed Description
In order to facilitate understanding of the present application, the technical solutions in the present application will be described more fully and in detail with reference to the drawings and the preferred embodiments, but the scope of protection of the present application is not limited to the following specific embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.
It will be understood that when an element is referred to as being "coupled" or "connected" to another element, it can be directly coupled, connected or communicated with the other element or indirectly coupled, connected or communicated with the other element via other intervening elements.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application.
Examples
Referring to fig. 2, a water-producing flow-guiding net for a roll-type membrane element comprises an upper layer 1 and a lower layer 2 which are oppositely arranged, wherein a middle flow channel layer 3 is arranged between the upper layer 1 and the lower layer 2, the upper layer 1 and the lower layer 2 are formed by interweaving a plurality of net wires which are staggered along the transverse direction and the warp direction and are used for supporting a membrane, the middle flow channel layer 3 is composed of a plurality of warp-direction net wire groups which are arranged in parallel, and a flow channel groove 4 is formed between any two adjacent warp-direction net wire groups and is used for collecting and guiding fluid.
The total thickness of the water production diversion net is d, and d is more than or equal to 0.15mm and less than or equal to 0.5 mm. When the thickness is too small, the integral pressure-bearing capacity is weaker, and the flow rate of produced water is too small due to too narrow flow channels; when the thickness is too large, the whole space of the membrane element can be influenced, and the filling amount of the membrane material is reduced.
The thicknesses of the upper layer 1 and the lower layer 2 are respectively h2And h3And 1/3d is less than or equal to h2≤1/2d，1/3d≤h3Is less than or equal to 1/2 days. When the thickness of the upper layer and the lower layer is less than 1/3 of the total thickness of the flow guide net, the integral pressure bearing capacity of the water production flow net is influenced; when the thickness of any one side is less than 1/3, the pressure bearing of the side is too low, and the side is easily collapsed to cause the blockage of the flow channel.
The depth of the runner groove 4 is h1Width of l2The width of the warp direction net wire group is l1And h is1≤l1，l2≤l1≤2×l2. By further limiting the width of the warp-wise net wire group and associating the width with the specification and the size of the runner groove 4, the support strength and the water passing rate of the water production diversion net can be considered at the same time, the applicability is good, and the practical popularization value is achieved.
In the embodiment, the density of the transverse net wires and the warp net wires in the upper layer 1 and the lower layer 2 is 60-120 pieces/inch. Mesh density below 60 threads/inch affects overall pressure capacity, and above 120 threads/inch affects the rate of aqueous fluid flow.
Will be described in the present embodimentThe produced water diversion net is compared with the conventional produced water diversion net (see figure 1) for performance test, and specifically, a seawater desalination membrane (with the thickness of 5.7mil, the desalination rate of 99.85 percent and the flux of 18GFD), a water inlet grid (25-28mil) and each produced water diversion net are coiled into 400ft28040 membrane element.
The performance test method comprises the following steps: test solution 32000ppmNaCl, 25 +/-1 ℃, pH 7-8, operating pressure 5.5MPa and recovery rate 8%; before the performance test of the membrane elements, each membrane element was operated for 24h under the pressure condition of 9 MPa. The test results are shown in Table 1.
Table 1 comparison results of performance tests of water production diversion net and conventional water production diversion net of the present application
The membrane elements in comparative examples 1 and 2 were all rolled with a water production diversion net of a conventional structure, and the membrane elements in examples 1 to 5 were all rolled with the water production diversion net of the present application.
As can be seen from the data in the table, the membrane elements in comparative examples 1 and 2 had lower water production after long-term high-pressure operation; the water yield of the membrane elements of examples 1 to 5 was still kept at a high level, and the effect of maintaining the water yield efficiency was significant.
In addition, in comparative examples 1 and 2, because the supporting force of the water production flow guide net on the membrane is insufficient, the membrane is pressed into the runner groove under the action of high pressure to form obvious transverse grains; the water-producing flow guide nets in the embodiments 1 to 5 have good supporting performance, the membrane is not pressed into the runner groove, and almost no transverse lines are seen from the appearance. The appearance observations were consistent with the performance test results described above.
In comparative example 3, the thickness of the upper layer 1 is less than the overall thickness, i.e., h2< 1/3 d. Under these conditions, the pressure bearing capacity of the water producing drainage net on that side is reduced, and although there is an improvement in the striation performance compared to conventional products, the striation problem still affects the water production efficiency compared to the examples, and the striations are visible to the naked eye.
In comparative examples 4 to 6, since the thickness of the upper layer 1 reaches the standard, the upper layer 1 has a certain deformation resistance effect, and even if the support strength provided by the warp-wise mesh wire group is changed, the upper layer 1 is not caused to obviously sink, so that the problems of the cross striations visible to naked eyes in the comparative examples 4 to 6 hardly exist. Further, the air conditioner is provided with a fan,
in comparative example 4, the width of the warp direction mesh group was smaller than the depth of the runner groove 4, i.e. /)1＜h1. Under this condition, although the width of the warp direction mesh wire group becomes narrow and the supporting effect for the upper layer 1 becomes poor, so that the upper layer 1 slightly sags to affect the water passing amount of the runner duct 4, at the same time, the whole volume of the runner duct 4 is relatively increased based on the width change of the warp direction mesh wire group, and a part of the water passing amount is supplemented, so that the final water yield after the synthesis is still reduced, and although the reduction is not much, the comparative example 4 is not an optimal proposal.
In comparative example 5, the width of the warp direction mesh group was smaller than the width of the runner duct 4, i.e. /)1＜l2. Under the condition, the supporting effect of the warp-wise mesh groups on the upper layer 1 is poor, the upper layer above the runner groove 4 is wholly sunk, and the water yield is obviously reduced because the sunk area is large and the influence is serious.
In comparative example 6, the width of the warp direction mesh group was larger than twice the width of the runner duct 4, i.e. /)1＞2×l2. Under the condition, the warp net wire groups occupy too much space in the product, the space of part of the runner groove 4 is squeezed, the water passing amount is reduced, but the supporting strength of the warp net wire groups is increased, the sinking problem of the upper layer 1 is greatly relieved, the runner groove 4 enlarges part of the space, the final water yield after the synthesis is reduced, and although the reduction is not much, the comparison example 6 is not an optimal scheme.
The above description is only a few examples of the present application and does not limit the scope of the claims of the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present application. Any improvement or equivalent replacement directly or indirectly applicable to other related technical fields within the spirit and principle of the present application by using the contents of the specification and the drawings of the present application shall be included in the protection scope of the present application.
Claims (8)
1. The utility model provides a formula of book membrane element is with producing water diversion net, its characterized in that, including upper strata (1) and lower floor (2) of relative setting be equipped with middle runner layer (3) between upper strata (1) and lower floor (2), upper strata (1) and lower floor (2) all include a plurality of along horizontal and warp direction staggered arrangement's net silk for support the diaphragm, middle runner layer (3) include a plurality of parallel arrangement's net silk group, form runner groove (4) between two arbitrary adjacent net silk groups for collect and the water conservancy diversion the fluid.
2. The produced water diversion net for roll-type membrane element according to claim 1, wherein the total thickness of the produced water diversion net is d, and d is 0.15mm or more and 0.5mm or less.
3. Produced water deflection net for spiral wound membrane elements according to claim 2, characterized in that the thickness of the upper layer (1) and the lower layer (2) is h2And h3And 1/3d is less than or equal to h2≤1/2d，1/3d≤h3≤1/2d。
4. Water production deflection net for spiral wound membrane elements according to claim 1, characterized in that the runner channels (4) are separated by groups of parallel arranged warp direction wires.
5. The water production diversion net for roll type membrane element according to claim 4, wherein the width of said warp direction net wire group is l1The width of the runner groove (4) is l2And l is2≤l1≤2×l2。
6. Water production deflection net for spiral wound membrane elements according to claim 5, characterized in that the depth of the runner channel (4) is h1And h is1≤l1。
7. The water production flow guiding net for the roll type membrane element according to any one of claims 1 to 6, characterized in that the arrangement density of the transverse net wires and the warp net wires in the upper layer (1) and the lower layer (2) is not lower than 60 pieces/inch.
8. The water production diversion net for the roll type membrane element according to claim 7, wherein the arrangement density of the transverse net wires and the arrangement density of the longitudinal net wires are both 60-120 pieces/inch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111340032.2A CN113941256A (en) | 2021-11-12 | 2021-11-12 | Formula of book film element is with producing water conservancy diversion net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111340032.2A CN113941256A (en) | 2021-11-12 | 2021-11-12 | Formula of book film element is with producing water conservancy diversion net |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113941256A true CN113941256A (en) | 2022-01-18 |
Family
ID=79337997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111340032.2A Pending CN113941256A (en) | 2021-11-12 | 2021-11-12 | Formula of book film element is with producing water conservancy diversion net |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113941256A (en) |
-
2021
- 2021-11-12 CN CN202111340032.2A patent/CN113941256A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104941448A (en) | Reverse osmosis membrane element | |
| CN204799110U (en) | Reverse osmosis membrane technology | |
| CN102908901A (en) | Method for manufacturing spiral-wound reverse osmosis membrane component | |
| CN201244449Y (en) | Spiral coil type film element | |
| CN205550054U (en) | Bump formula broad flow passage spiral wound module | |
| CN216223821U (en) | Formula of book film element is with producing water conservancy diversion net | |
| CN113941256A (en) | Formula of book film element is with producing water conservancy diversion net | |
| CN208990579U (en) | Reverse-osmosis membrane element and water purification machine | |
| CN102166477B (en) | Rolled reverse osmosis membrane element with gradually-reduced inlet channel | |
| CN112619426A (en) | Application of spiral-wound membrane module permeation side separation net and polypropylene hard elastic membrane in spiral-wound membrane module | |
| CN204485664U (en) | A kind of Novel roll-type membrane component | |
| CN101721912A (en) | Method for increasing membrane area of spiral wound type membrane element | |
| CN113694585A (en) | Tangential flow filter assembly, tangential flow filter device and perfusion system | |
| CN205435498U (en) | A roll formula membrane module is just permeating | |
| CN109012205A (en) | A kind of production water filter, method for coiling and reverse-osmosis membrane element | |
| CN206045809U (en) | Central canal group and spiral wound reverse-osmosis membrane element | |
| CN206103724U (en) | Spiral wound type reverse osmosis membrane technology and reverse osmosis water purifier | |
| CN205965522U (en) | High -efficient book formula filter core | |
| CN208121468U (en) | A kind of veil for defending roll paper for producing multilayer | |
| CN204298113U (en) | Improve the structure of RO counter-infiltration diaphragm utilization rate and flux | |
| JP3292183B2 (en) | Spiral reverse osmosis membrane element | |
| CN219333799U (en) | Water inlet separation net and filter element with same | |
| CN101966428A (en) | Spiral wound membrane element | |
| CN113101807A (en) | Membrane module, membrane equipment with membrane module and membrane system | |
| CN214764557U (en) | Reverse osmosis membrane element with transverse linear type water inlet flow channel structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 412007 4th Torch Road, Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province Applicant after: Hunan Aowei Technology Co.,Ltd. Address before: 412007 4th Torch Road, Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province Applicant before: HUNAN OVAY TECHNOLOGY Co.,Ltd. |