CN113694737B - Self-cleaning water inlet partition net and application - Google Patents
Self-cleaning water inlet partition net and application Download PDFInfo
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- CN113694737B CN113694737B CN202110931852.2A CN202110931852A CN113694737B CN 113694737 B CN113694737 B CN 113694737B CN 202110931852 A CN202110931852 A CN 202110931852A CN 113694737 B CN113694737 B CN 113694737B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000005192 partition Methods 0.000 title description 6
- 239000012528 membrane Substances 0.000 claims abstract description 64
- 238000000926 separation method Methods 0.000 claims abstract description 28
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 11
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 230000000052 comparative effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000003344 environmental pollutant Substances 0.000 description 7
- 230000004907 flux Effects 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CNPVJWYWYZMPDS-UHFFFAOYSA-N 2-methyldecane Chemical compound CCCCCCCCC(C)C CNPVJWYWYZMPDS-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012527 feed solution Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005373 pervaporation Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- 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
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/30—Mechanical cleaning, e.g. with brushes or scrapers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a self-cleaning water inlet separation net and application thereof, comprising longitudinal net wires and transverse net wires which are mutually staggered, wherein the longitudinal net wires and the transverse net wires are supported and fixed by a supporting body at the staggered position, and are only contacted with upper and lower film surfaces by the supporting body, and the supporting body is also provided with a fixing ring for connecting a swing rod with a blade; one end of the swing rod with the blade is a connecting ring, the other end of the swing rod with the blade is a cleaning blade, and the connecting ring is connected with the cleaning blade through a thin rod; the swing rod with the blades is connected with the fixing ring on the support body through the connecting ring to form a ring buckle. The membrane element manufactured by the water inlet separation net roll with self-cleaning function increases the self-cleaning effect of the membrane element, thereby enabling the whole reverse osmosis system to have self-cleaning capability.
Description
Technical Field
The invention relates to the technical field of membrane separation, in particular to a self-cleaning water inlet separation net and application thereof.
Background
The coiled membrane element consists of a central tube, a water inlet separation net, a water production separation net, a membrane and the like, wherein membrane pollution can occur in the coiled membrane element in the service process, and common membrane pollution comprises precipitation pollution, microbial pollution, colloid pollution and the like. Among the several types of membrane fouling, microbial fouling is one of the most serious types of water quality degradation and operational difficulties in reverse osmosis systems. Meanwhile, due to the quadrilateral structure of the water inlet separation net, microorganisms can be attached to four corners of the water inlet separation net, so that pollutant accumulation is easier to cause, and the filtering effect of the membrane is affected. For severely contaminated roll-type membrane elements, chemical cleaning is generally used to eliminate the contamination, but frequent chemical cleaning affects the performance of the roll-type membrane element.
Chinese patent application CN108176235A discloses a new-configuration screen, which is a mesh structure formed by interlaced screen wires, the screen wires are cylindrical structures with transitional thickness, and keep a certain included angle, and the screen runner presents a diamond structure; the crossing part of the screen wires is supported by the node small balls, the node small balls are contacted with the surface of the membrane, and the screen wires and the surface of the membrane do not form contact lines, so that the screen wires are in a suspended state in the flow channel. The new-configuration separation net not only can be used for a reverse osmosis membrane assembly, but also can be used for membrane separation processes such as nanofiltration, ultrafiltration, pervaporation, gas separation and the like. The new-configuration screen can also effectively reduce the pressure drop in the membrane process and reduce the energy consumption in the operation process.
Chinese patent CN205627658U discloses a rolled membrane module screen structure, including many criss-cross connection form the first rib and the second rib of network structure, still include many crooked folding third ribs that are the flute form structure, first rib and second rib criss-cross connection form the junction, and the bending end of each of them one side corresponds respectively and is connected with each junction, and this rolled membrane module screen structure abandons traditional flat rhombus and separates the structural style of net or rectangle and separate the net, has first rib, second rib and the three rib interweaves and constructs into the solid screen structure, and wherein, the triangular region that the folding constitution of third rib is crooked forms circumference water inlet runner, and this circumference water inlet runner has increased the runner cross-section area along winding center tube direction, makes the runner be difficult for blockking up, has also reduced the resistance of rivers direction, effectively reduces the circumstances of rivers impurity deposit in the membrane.
In the prior art, the triangular area formed by bending and folding the third ribs is added through the shapes of the support body and the separation net wires, so that the mass transfer of fluid is enhanced, and concentration polarization and membrane pollution are reduced. However, the water inlet separating net in the prior art still cannot effectively clean four corners of the quadrangular separating net, and the problem of membrane pollution cannot be effectively solved.
Therefore, the improvement of the water inlet separation net structure is the key for improving the performance of the water inlet separation net.
Disclosure of Invention
In order to solve the technical problems, the invention provides a self-cleaning water inlet partition net, which is structurally improved, so that the self-cleaning effect is realized, and particularly, the self-cleaning of four corners of the partition net is realized, and the attachment of microorganisms at the corners is avoided.
It is a further object of the present invention to provide the use of such a self-cleaning water intake screen.
In order to achieve the above object, the present invention adopts the following technical scheme:
The self-cleaning water inlet separation net comprises longitudinal net wires and transverse net wires which are mutually staggered, wherein the longitudinal net wires and the transverse net wires are supported and fixed by a supporting body at the staggered position, and are only contacted with the upper membrane surface and the lower membrane surface by the supporting body, and the supporting body is also provided with a fixing ring for connecting a swing rod with a blade; one end of the swing rod with the blade is a connecting ring, the other end of the swing rod with the blade is a cleaning blade, and the connecting ring is connected with the cleaning blade through a thin rod; the swing rod with the blades is connected with the fixing ring on the support body through the connecting ring to form a ring buckle.
In a specific embodiment, the cross-sectional shape of the longitudinal and/or transverse wires is at least any one of triangular, quadrangular, circular or elliptical, and the angle α between the longitudinal and transverse wires is 90 ° to 150 °.
In a specific embodiment, the vertical height of the support is d 1, the circumscribing radius of the longitudinal and/or transverse wire cross-section is r 1, and d 1 and r 1 satisfy the following relationship: d 1/r1 is more than or equal to 5 and less than or equal to 9.
In a specific embodiment, the spacing between the longitudinal and/or transverse wires and the upper and lower film faces is d 2, then d 2 and r 1 satisfy the following relationship: d 2/r1 multiplied by 100 percent which is more than or equal to 80 percent and less than or equal to 110 percent; preferably, the thickness of the water inlet spacer is 34mil to 80mil.
In a specific embodiment, the form of contact between the support and the upper and lower membrane faces is selected from any one of point contact, line contact or surface contact.
In a specific embodiment, the fixing ring starts at one end of the longitudinal and/or transverse wires connected to the support and ends at the other end of the longitudinal and/or transverse wires connected to the support; preferably, the retainer ring radius is r 2, then r 2 and d 1 satisfy the following relationship: d 1/r2 is more than or equal to 4 and less than or equal to 8; more preferably, the radius of the inner ring of the fixing ring is r 3, which is half of the distance between the upper and lower longitudinal wires and the transverse wires on the same side connected with the support body.
In a specific embodiment, the radius of the connecting ring at the end of the oscillating bar with blades is r 4, and r 4 and d 1 satisfy the following relationship: d 1/r4 is more than or equal to 4 and less than or equal to 8.
In a specific embodiment, the length of the thin rod in the swinging rod with the blade is L 1, the length of the quadrangle enclosed by the transverse wires along the diagonal line of the water flow direction is L 2, and then L 1 and L 2 satisfy the following relationship: l 1/L2 is more than or equal to 2/3 and less than or equal to 3/4; preferably, the length of the axis of the cleaning sheet in the swinging rod with blades is L 3, and d 1 and L 3 satisfy the following relationship: l 3/d1 is more than or equal to 2 and less than or equal to 6; more preferably, the area of the blade in the swinging rod with the blade is s 1, the quadrilateral area enclosed by the transverse wires is s 2, and then s 1 and s 2 satisfy the following relationship: s 1/s2 multiplied by 100 percent which is more than or equal to 1 percent and less than or equal to 5 percent; further preferably, the shape of the cleaning sheet is selected from any one or more of quadrangle, triangle, ellipse, sector, and blade.
In a specific embodiment, the distance between two adjacent longitudinal wires in the quadrilateral area enclosed by the transverse wires is D, and D 1 and D satisfy the following relationship: D/D 1 is more than or equal to 4 and less than or equal to 10.
In another aspect of the invention, the use of the self-cleaning water inlet spacer described above in a rolled membrane module or reverse osmosis membrane.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention overcomes the defect of the water inlet separation net in the prior art, and the swinging rod with the cleaning sheet can swing up and down at random and back and forth under the drive of water flow, so that corners where pollutants are easy to accumulate in the separation net are cleaned, the problem that the flux of the membrane is reduced due to the aggregation of the pollutants in the flow channel in the service process of the membrane assembly is effectively avoided, the membrane assembly can stably operate for a long time, and the self-cleaning performance of the membrane element is greatly improved.
According to the self-cleaning water inlet partition net, through the optimization design of the size and the position relation of each part, the system cleaning times are reduced and the system operation cost is reduced under the condition of poor water inlet quality.
Drawings
FIG. 1 is a schematic top view of the water inlet screen of the present invention.
Fig. 2 is a schematic front view of a single lattice structure of the water intake spacer of the present invention.
Fig. 3 is an enlarged partial schematic view of a single mesh structure of the water intake spacer of the present invention.
Fig. 4 is a schematic view of the point contact of the support body of the single grid of the water inlet spacer of the present invention.
Fig. 5 is a schematic view of the surface contact of a single mesh support of the water inlet spacer of the present invention.
Fig. 6 is a schematic view of the present invention in line contact with a single mesh support of the water intake spacer.
In the figure: 101 is a longitudinal net wire, 102 a transverse net wire, 103a supporting body, 104 a swinging rod with blades, 201 an upper film surface, 202 a lower film surface, 301 a fixing ring, 401 a connecting ring, 402 a thin rod, 403 a cleaning blade.
Detailed Description
The following examples will further illustrate the method provided by the present invention for a better understanding of the technical solution of the present invention, but the present invention is not limited to the examples listed but should also include any other known modifications within the scope of the claims of the present invention.
As shown in fig. 1, a self-cleaning water intake screen comprises a plurality of longitudinal wires 101, a plurality of transverse wires 102, a support body 103 and a swinging rod 104 with blades. The longitudinal wires 101 and the transverse wires 102 are arranged in a staggered manner, and the longitudinal wires 101 and the transverse wires 102 are supported and fixed by the supporting body 103 at the staggered position. The diamond-shaped part in the figure is the framework of the water inlet separation net. Other portions, such as longitudinal and transverse wires 101, 102, etc., are attached directly or indirectly to this framework. Wherein, as shown in fig. 1, the included angle α between the longitudinal wires 101 and the transverse wires 102 is 90 ° to 150 °, including, but not limited to, 90 °, 100 °, 110 °, 120 °, 130 °, 140 °, 150 °, and the cross-sectional shapes of the longitudinal wires 101 and the transverse wires 102 are not limited at all, and are one or several of triangle, quadrangle, circle, and ellipse, preferably circular. The thickness of the longitudinal wires 101 and the transverse wires 102 is not particularly limited, and generally does not exceed half the vertical height d 1 of the support 103.
As shown in fig. 2, in the water inlet spacer of the present invention, the support 103 is in contact with the upper membrane surface 201 and the lower membrane surface 202, while the longitudinal wires 101 and the transverse wires 102 are not in contact with the upper membrane surface 201 and the lower membrane surface 202. Wherein the vertical height of the support 103 is d 1, typically 34mil-80mil, for example, including but not limited to 34mil, 36mil, 38mil, 40mil, 45mil, 50mil, 55mil, 60mil, 65mil, 70mil, 75mil, 80mil. The circumscribing radii r 1 of the longitudinal wire 101 and transverse wire 102 cross-sections, then d 1 and r 1 satisfy the following relationship: 5.ltoreq.d 1/r1.ltoreq.9, e.g. d 1/r1 includes but is not limited to 5, 6, 7, 8, 9. Too large a ratio can result in too thin a cross/machine direction wire diameter and insufficient wire strength; too small a diameter of the transverse/longitudinal wires will result in too large a diameter of the transverse/longitudinal wires and too large a resistance to the flow of water in the grid.
In general, when the support 103 is in contact with the upper film surface 201 and the lower film surface 202, it is preferable that the longitudinal wires 101 and/or the transverse wires 102 are spaced from the upper film surface 201 or the lower film surface 202 by the same distance. Assuming that the spacing between the longitudinal or transverse wire 101, 102 and the upper or lower film face 201, 202 is d 2, then d 2 and r 1 satisfy the following relationship: 80% or less d 2/r1 X100% or less 110%, for example d 2/r1 X100% includes but is not limited to 80%, 90%, 100%, 110% etc. The function of this design is to control the spacing between the membrane face and the mesh, not so much or too little as to affect the flow of influent water in the spacer mesh.
The contact manner between the support 103 and the upper film surface 201 or the lower film surface 202 may be any one of point contact (as shown in fig. 4), line contact (as shown in fig. 6), or surface contact (as shown in fig. 5). The point contact, i.e. the ellipsoidal vertex of the support 103 is tangential to the membrane surface, constitutes a point contact. The surface contact means that the supporting body 103 is in contact and fit with the film surface at a certain cross section higher than the longitudinal or transverse wires. The wire base, that is, the supporting body 103 forms a contact line on a certain cross section higher than the longitudinal wire or the transverse wire and contacts and fits with the film surface.
As shown in fig. 3, a fixing ring 301 for connecting the swing rod 104 with blades is provided at a middle position of the supporting body 103. The fixing ring 301 starts at one end of the longitudinal wire 101 or the transverse wire 102 connected to the support 103 and ends at the other end of the transverse wire 102 or the longitudinal wire 101 connected to the support 103. As shown in fig. 3, the fixing ring 301 is a ring for connecting the swing rod 104 with blades. The radius of the fixing ring 301 is r 2, and then r 2 and d 1 satisfy the following relationship: 4.ltoreq.d 1/r2.ltoreq.8, e.g. d 1/r2 includes but is not limited to 4, 5, 6, 7, 8, too small a ratio would be too thick for the retaining ring 301 to affect the oscillation of the cleaning blades 403; if the ratio is too large, the fixing ring is too thin and is easy to break. Meanwhile, the radius r 3 of the inner ring of the fixing ring 301 is half of the distance between the upper and lower longitudinal wires 101 and the transverse wires 102 on the same side, which are connected with the supporting body. The advantage of this design is that it means that the cleaning blade 403 can swing up to the transverse wire 102 and down to the longitudinal wire 101, so that the cleaning blade 403 can swing completely between the longitudinal wire 101 and the transverse wire 102, thus the cleaning effect is good and no dead angle is left.
One end of the swing rod 104 with the blades is a connecting ring 401, the other end is a cleaning blade 403, and the connecting ring 401 and the cleaning blade 403 are connected through a thin rod 402; the swinging rod 104 with the blades is connected with the fixing ring 301 on the supporting body 103 through the connecting ring 401 to form a ring-ring buckling connection mode, wherein the connecting ring 401 is sleeved on the fixing ring 301 and can freely move, so that the swinging rod 104 with the blades can swing up and down at random under the driving of water flow, and corners, which are easy to cause pollutant accumulation, in the isolating net are cleaned.
The front end of the swinging rod 104 with the blade is provided with a connecting ring 401, the radius of the connecting ring 401 is r 4, and then r 4 and d 1 meet the following relation: 4.ltoreq.d1/r 4.ltoreq.8, e.g. d1/r4 includes but is not limited to 4, 5, 6, 7, 8, too large a ratio will affect the strength of the connecting ring 401; too little can reduce the swing flexibility of the attachment ring 401, affecting the cleaning effect. The rear end of the swinging rod 104 with blades is provided with a thin rod 402 for connecting and fixing the cleaning blades 403 and the connecting ring 401 at the front end.
As shown in fig. 1, the length of the thin rod 402 is L 1, and the length L 2 of the quadrangle enclosed by the transverse wires 101 and 102 along the diagonal line of the water flow direction, so that L 1 and L 2 satisfy the following relation: the size of L 1/L2≤3/4,L1/L2 which is more than or equal to 2/3 is that the position of the blade in the separation net is short, too long can cause too large length, the swing is inflexible, and too short can cause insufficient swing range, and the cleaning effect is affected.
Meanwhile, the length at the axis of the cleaning blade 403 is L 3, and d 1 and L 3 satisfy the following relationship: 2.ltoreq.L 3/d1.ltoreq.6, for example L 3/d1 includes but is not limited to 2,3, 4,5, 6. If the length L 3 of the cleaning blade is too small, the disturbance is insufficient during cleaning, and the cleaning effect is poor; if too large, too many cleaning blades L 3 will be caused, and the fluctuation caused by disturbance during cleaning is too dense, so that the better effect is not achieved. In addition, the area of the cleaning blade 403 is s 1, the quadrilateral area enclosed by the transverse wires 101 and 102 is s 2, and s 1 and s 2 satisfy the following relationship: 1% or less s 1/s2 x 100% or less 5%, for example, s 1/s2 x 100% including but not limited to 1%, 2%, 3%, 4%, 5%, i.e., the area of the cleaning blade 403 should not be too large as to occupy the area of the single water inlet screen frame, otherwise the flow of water in the grid would be affected, and too small an area of the cleaning blade 403 as to occupy the single water inlet screen frame would cause insufficient disturbance during cleaning and poor cleaning. The shape of the cleaning blade 403 of the present invention is not particularly limited, and may be any one or more of a quadrangle, a triangle, an ellipse, a fan, a blade shape, and any other sheet shape. Wherein the area s 1 of the cleaning blade 403 is the maximum cross-sectional area of any angular section of the cleaning blade 403.
In one grid, as shown in fig. 1, the distance between two adjacent longitudinal wires 101 or transverse wires 102 in one quadrilateral area is D, and the distance between the connection points of the two adjacent longitudinal wires 101 or transverse wires 102 and the supporting body 103 is based on that, in one horizontal or vertical section, the distance between the two adjacent longitudinal wires 101 or transverse wires 102 is equal, so that D 1 and D satisfy the following relationship: 4.ltoreq.D/D 1.ltoreq.10, e.g.D 1, including but not limited to 4,5, 6, 7, 8, 9, 10, too large results in too sparse transverse/longitudinal wires, not very good support for the membrane surface, too small results in too dense, too high water flow resistance.
The thickness of the self-cleaning water inlet separation net formed by the transverse net wires, the longitudinal net wires, the supporting body, the swinging rods with the blades and the upper film surface and the lower film surface is 34mil-80mil, namely the distance between the lower surface of the upper film surface and the upper surface of the lower film surface, and the self-cleaning water inlet separation net comprises 34mil, 40mil, 45mil, 50mil, 55mil, 60mil, 65mil, 70mil, 75mil and 80mil.
The self-cleaning water inlet separating net can be rolled into a rolled membrane element which is used in a reverse osmosis membrane or a system, the specific rolling step is not particularly limited, the method can be completely processed by referring to the prior art, as long as the structural form and parameters of each part are processed according to the standard of the invention, the specific rolling process is for example referred to CN201280016531, and the related rolling process can be introduced into the invention.
The main raw material sources of the examples and comparative examples are as follows:
| Raw material name | Parameter index | Manufacturing factories |
| Isopar G isoparaffins | Boiling range 161-173 DEG C | Acciaierie Eisen Mobil SpA |
| Sodium dodecyl sulfate | Purity is more than 99.0 percent | Ala Ding Shiji Co Ltd |
| Water inlet partition net | Thickness: 34mil | Dexing technology (Suzhou Co., ltd.) |
The test methods used in the examples or comparative examples of the present invention are described below:
The method for measuring the performance of the water inlet separation net comprises the following steps: the self-cleaning water inlet separation net is rolled into a membrane element with the length of 4 inches, and then the membrane element is put into a pressure container for testing the reverse osmosis membrane element, and performance test is carried out, wherein the performance test method can refer to HY/T107-2017 (roll type reverse osmosis membrane element test method).
The evaluation method simulates the pollution faced by the reverse osmosis membrane element during the actual use as far as possible by adding pollutants into the feed, and calculates the attenuation reduction amplitude of the flux of the membrane element at 8 hours, namely the ratio of the flux (F 1) of the membrane after pollution to the initial flux (F 0), as shown in the following formula:
Flux decay rate = F 1/F0 x 100%.
The self-cleaning capability of the reverse osmosis membrane element can be quantitatively calculated, namely, the greater the attenuation degree of the membrane flux is in the presence of pollutants, the worse the self-cleaning capability of the membrane element is.
For a better understanding of the present test method, the evaluation procedure of the self-cleaning performance will be briefly described as follows:
(1) Preparing a pollutant solution: 0.45kg of isoparaffin isoparG and 0.05kg of sodium dodecyl sulfate were added to 99.5kg of water, and dispersed in an ultrasonic tank for 30 minutes to obtain an emulsion of isoparaffin isoparG.
(2) Adding sodium chloride into the oil emulsion prepared in the step (1) to make the concentration of sodium chloride be 2000ppm, and finally adjusting the pH value to 7.5+/-0.5 by using 1.0mol/L sodium hydroxide solution to serve as a test feed liquid. The test pressure of the membrane element was set at 1.55MPa and the feed solution temperature was 25 ℃.
Example 1
The upper and lower ends of the support body are contact points (shown in fig. 4) which can be in point contact with the membrane surface, and the rest parameters are shown in the attached table 1.
Example 2
The upper and lower ends of the support body are contact lines (shown in fig. 6) which can be in line contact with the membrane surface, and the rest parameters are shown in the attached table 1.
Example 3
The upper and lower ends of the support body are contact surfaces (shown in fig. 5) which can be in surface contact with the membrane surface, and the rest parameters are shown in the following table 1.
Examples 4 to 6
The upper and lower ends of the support body are contact points (shown in fig. 4) which can be in point contact with the membrane surface, but other parameters are different, and other specific parameters are shown in the attached table 1.
Examples 7 to 9
The upper and lower ends of the support body are contact lines (shown in fig. 6) which can be in line contact with the membrane surface, but other parameters are different, and other specific parameters are shown in the attached table 1.
Examples 10 to 11
The upper and lower ends of the support body are contact surfaces (as shown in figure 5) which can be in surface contact with the membrane surface, but other parameters are different, and other specific parameters are shown in the attached table 1
Comparative example 1
The upper and lower ends of the support body are contact points, the support body is in point contact with the membrane surface, a water inlet separation net commonly used in the market is adopted, the self-cleaning function shown in the invention is not provided, and the parameters are shown in the attached table 1.
Comparative example 2
As comparative example to example 1, the remaining specific parameters are shown in Table 1
Comparative example 3
As comparative example to example 2, the remaining specific parameters are shown in Table 1
Comparative example 4
As comparative example to example 3, the remaining specific parameters are shown in Table 1
Table 1 attached water inlet screen parameter table
The self-cleaning ability test was performed using the water-feeding spacer-rolled membrane elements prepared in the different examples and comparative examples, and the test results are shown in table 2:
TABLE 2 film element Performance test results
As shown by the data in the table, the self-cleaning water inlet separation net is rolled into a membrane element, and the flux attenuation rate after being used for a period of time is obviously lower than that of the water inlet separation net without a self-cleaning function in the market, so that the water inlet separation net has a good self-cleaning effect, and the whole reverse osmosis system has good self-cleaning capability.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Those skilled in the art will appreciate that certain modifications and adaptations of the invention are possible and can be made under the teaching of the present specification. Such modifications and adaptations are intended to be within the scope of the present invention as defined in the appended claims.
Claims (13)
1. The self-cleaning water inlet separation net is characterized by comprising longitudinal net wires and transverse net wires which are mutually staggered, wherein the longitudinal net wires and the transverse net wires are supported and fixed by a supporting body at the staggered position and are only contacted with the upper membrane surface and the lower membrane surface by the supporting body, and the supporting body is also provided with a fixing ring for connecting a swing rod with a blade; one end of the swing rod with the blade is a connecting ring, the other end of the swing rod with the blade is a cleaning blade, and the connecting ring is connected with the cleaning blade through a thin rod; the swing rod with the blades is connected with the fixed ring on the support body through the connecting ring to form a ring buckle; the fixing ring starts from one end of the longitudinal mesh wire and/or the transverse mesh wire connected with the support body and ends from the other end of the longitudinal mesh wire and/or the transverse mesh wire connected with the support body;
The included angle alpha between the longitudinal mesh and the transverse mesh is 90-150 degrees;
The vertical height of the support body is d 1, the radius of the circumcircle of the cross section of the longitudinal mesh wire and/or the transverse mesh wire is r 1, and d 1 and r 1 satisfy the following relationship: d 1/r1 is more than or equal to 5 and less than or equal to 9;
The length of the thin rod in the swing rod with the blades is L 1, the length of a quadrangle enclosed by the transverse net wires and the transverse net wires along the diagonal line of the water flow direction is L 2, and then L 1 and L 2 meet the following relation: l 1/L2 is less than or equal to 2/3 and less than or equal to 3/4.
2. A self-cleaning intake screen as recited in claim 1, wherein the cross-sectional shape of the longitudinal and/or transverse wires is at least one of triangular, quadrilateral, circular or elliptical.
3. A self cleaning intake screen according to claim 1 or 2, wherein the spacing between the longitudinal and/or transverse screen wires and the upper and lower film faces is d 2, then d 2 and r 1 satisfy the following relationship: d 2/r1 multiplied by 100 percent which is 80 percent or less and 110 percent or less.
4. A self-cleaning intake screen as recited in claim 3, wherein the intake screen has a thickness of 34mil to 80mil.
5. A self-cleaning intake screen as recited in claim 1, wherein the form of contact between the support and the upper and lower membrane surfaces is selected from any one of point contact, line contact or surface contact.
6. A self cleaning intake screen as claimed in claim 1 wherein the retainer ring radius is r 2, then r 2 and d 1 satisfy the following relationship: d 1/r2 is more than or equal to 4 and less than or equal to 8.
7. The self-cleaning intake screen of claim 6, wherein the radius of the inner ring of the retaining ring is r 3, which is half the distance between the upper and lower longitudinal wires and the transverse wires on the same side connected to the support.
8. A self cleaning intake screen as claimed in claim 1 wherein the radius of the connecting ring at the end of the bladed swing rod is r 4, then r 4 and d 1 satisfy the following relationship: d 1/r4 is more than or equal to 4 and less than or equal to 8.
9. A self cleaning intake screen as claimed in claim 1 wherein the length of the cleaning sheet in the bladed swing lever at the axis is L 3, then d 1 and L 3 satisfy the following relationship: l 3/d1 is more than or equal to 2 and less than or equal to 6.
10. A self-cleaning intake screen according to claim 9, wherein the area of the blades in the swinging rod with blades is s 1, the quadrilateral area enclosed by the transverse wires is s 2, s 1 and s 2 satisfy the following relationship: s 1/s2 multiplied by 100 percent which is more than or equal to 1 percent and less than or equal to 5 percent.
11. A self-cleaning intake screen as claimed in claim 10 wherein the cleaning sheet is in a shape selected from any one or more of quadrilateral, triangular, elliptical, fan-shaped or blade-shaped.
12. A self-cleaning intake screen according to any one of claims 9 to 11, wherein the distance between two adjacent longitudinal wires in the quadrilateral area defined by the transverse wires and the transverse wires is D, and D 1 and D satisfy the following relationship: D/D 1 is more than or equal to 4 and less than or equal to 10.
13. Use of a self-cleaning feed water spacer according to any one of claims 1 to 12 in a roll-to-roll membrane module or a reverse osmosis membrane.
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06327949A (en) * | 1993-05-21 | 1994-11-29 | Nitto Denko Corp | Membrane cleaning method for membrane separation device |
| JPH10263371A (en) * | 1997-03-28 | 1998-10-06 | Yuasa Corp | Immersion type filter membrane element |
| CN103269779A (en) * | 2011-01-18 | 2013-08-28 | 株式会社久保田 | Membrane separation device |
| WO2014018470A2 (en) * | 2012-07-23 | 2014-01-30 | W.L. Gore & Associates, Inc. | Filtration article with fluoropolymer knit |
| CN204757771U (en) * | 2015-06-01 | 2015-11-11 | 刘小春 | Closed spiral heat exchanger with from cleaning function |
| CN206414987U (en) * | 2016-08-31 | 2017-08-18 | 成都美富特膜科技有限公司 | MBR membrane modules and MBR membrane components |
| CN108176235A (en) * | 2018-01-19 | 2018-06-19 | 南京工业大学 | Novel structure type separates net |
| JP6359156B1 (en) * | 2017-06-30 | 2018-07-18 | 株式会社御池鐵工所 | Rotation separator |
| CN108434998A (en) * | 2017-02-16 | 2018-08-24 | 佛山市新柯尔本环保科技有限公司 | Filter swab |
| CN108993166A (en) * | 2018-08-14 | 2018-12-14 | 三达膜科技（厦门）有限公司 | A kind of pollution-resistant rolled film water conservancy diversion filter |
| CN208532326U (en) * | 2018-06-29 | 2019-02-22 | 合肥康家净电器有限公司 | A kind of Household water purifier that can be cleaned automatically |
| CN109794168A (en) * | 2019-03-27 | 2019-05-24 | 吴爱兵 | Reverse osmosis membrane group |
| CN209771845U (en) * | 2018-08-31 | 2019-12-13 | 山东久泰环保科技有限公司 | Multilayer composite fiber membrane filter assembly |
| CN110975643A (en) * | 2019-12-19 | 2020-04-10 | 时代沃顿科技有限公司 | Concentrated water separation net of roll type membrane element |
| CN211069667U (en) * | 2019-08-02 | 2020-07-24 | 江苏久吾高科技股份有限公司 | Roll type membrane element |
| CN212403629U (en) * | 2020-05-21 | 2021-01-26 | 阿克菲姆(嘉兴)科技有限公司 | Immersed membrane filtering device |
| CN212559557U (en) * | 2020-03-16 | 2021-02-19 | 佛山市云米电器科技有限公司 | Spiral separation net, resin filtering device and water purifier |
| KR102228281B1 (en) * | 2020-10-14 | 2021-03-16 | 주식회사 가람 | Water screen type cleaning tower with integral cleaning pump using water filter |
-
2021
- 2021-08-13 CN CN202110931852.2A patent/CN113694737B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06327949A (en) * | 1993-05-21 | 1994-11-29 | Nitto Denko Corp | Membrane cleaning method for membrane separation device |
| JPH10263371A (en) * | 1997-03-28 | 1998-10-06 | Yuasa Corp | Immersion type filter membrane element |
| CN103269779A (en) * | 2011-01-18 | 2013-08-28 | 株式会社久保田 | Membrane separation device |
| WO2014018470A2 (en) * | 2012-07-23 | 2014-01-30 | W.L. Gore & Associates, Inc. | Filtration article with fluoropolymer knit |
| CN204757771U (en) * | 2015-06-01 | 2015-11-11 | 刘小春 | Closed spiral heat exchanger with from cleaning function |
| CN206414987U (en) * | 2016-08-31 | 2017-08-18 | 成都美富特膜科技有限公司 | MBR membrane modules and MBR membrane components |
| CN108434998A (en) * | 2017-02-16 | 2018-08-24 | 佛山市新柯尔本环保科技有限公司 | Filter swab |
| JP6359156B1 (en) * | 2017-06-30 | 2018-07-18 | 株式会社御池鐵工所 | Rotation separator |
| CN108176235A (en) * | 2018-01-19 | 2018-06-19 | 南京工业大学 | Novel structure type separates net |
| CN208532326U (en) * | 2018-06-29 | 2019-02-22 | 合肥康家净电器有限公司 | A kind of Household water purifier that can be cleaned automatically |
| CN108993166A (en) * | 2018-08-14 | 2018-12-14 | 三达膜科技（厦门）有限公司 | A kind of pollution-resistant rolled film water conservancy diversion filter |
| CN209771845U (en) * | 2018-08-31 | 2019-12-13 | 山东久泰环保科技有限公司 | Multilayer composite fiber membrane filter assembly |
| CN109794168A (en) * | 2019-03-27 | 2019-05-24 | 吴爱兵 | Reverse osmosis membrane group |
| CN211069667U (en) * | 2019-08-02 | 2020-07-24 | 江苏久吾高科技股份有限公司 | Roll type membrane element |
| CN110975643A (en) * | 2019-12-19 | 2020-04-10 | 时代沃顿科技有限公司 | Concentrated water separation net of roll type membrane element |
| CN212559557U (en) * | 2020-03-16 | 2021-02-19 | 佛山市云米电器科技有限公司 | Spiral separation net, resin filtering device and water purifier |
| CN212403629U (en) * | 2020-05-21 | 2021-01-26 | 阿克菲姆(嘉兴)科技有限公司 | Immersed membrane filtering device |
| KR102228281B1 (en) * | 2020-10-14 | 2021-03-16 | 주식회사 가람 | Water screen type cleaning tower with integral cleaning pump using water filter |
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