CN112316732A - Device for rapidly infiltrating and cleaning membrane yarns and utilization method thereof - Google Patents
Device for rapidly infiltrating and cleaning membrane yarns and utilization method thereof Download PDFInfo
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- CN112316732A CN112316732A CN202011005165.XA CN202011005165A CN112316732A CN 112316732 A CN112316732 A CN 112316732A CN 202011005165 A CN202011005165 A CN 202011005165A CN 112316732 A CN112316732 A CN 112316732A
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- 239000012528 membrane Substances 0.000 title claims abstract description 89
- 238000004140 cleaning Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 15
- 239000003906 humectant Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 20
- 150000002500 ions Chemical class 0.000 claims abstract description 17
- 230000008595 infiltration Effects 0.000 claims abstract description 12
- 238000001764 infiltration Methods 0.000 claims abstract description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 235000011148 calcium chloride Nutrition 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 235000002639 sodium chloride Nutrition 0.000 claims description 3
- 239000004317 sodium nitrate Substances 0.000 claims description 3
- 235000010344 sodium nitrate Nutrition 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 3
- 235000011008 sodium phosphates Nutrition 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 239000004695 Polyether sulfone Substances 0.000 claims description 2
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000001471 micro-filtration Methods 0.000 claims description 2
- 238000001728 nano-filtration Methods 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 229920002492 poly(sulfone) Polymers 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 229920006393 polyether sulfone Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 238000000108 ultra-filtration Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 abstract description 8
- 230000005684 electric field Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010828 elution Methods 0.000 abstract description 4
- 230000004907 flux Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012510 hollow fiber Substances 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 239000003899 bactericide agent Substances 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000007785 strong electrolyte Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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Classifications
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a device for rapidly infiltrating and cleaning membrane yarns, which is characterized in that: the box body is a hollow structure for accommodating ionic moisturizing solution or pure water; at least two electrode plates are arranged in the box body at intervals; the direct current power supply is connected with the electrode plate and used for cleaning and supplying power, and a first switch is arranged on the direct current power supply; and the alternating current power supply is connected with the electrode plate and used for supplying power in an infiltration mode, and a second switch is arranged on the alternating current power supply. According to the invention, by adding an alternating current electric field, the ionic humectant moves in the solution, so that the replacement of water in the membrane filament central tube and external ions is accelerated, the time for soaking the ionic humectant solution is shortened, and the production efficiency is improved. Through the external direct current electric field, the ordered movement of the ionic humectant in the membrane silk central tube in water is accelerated, the rapid elution of ions is realized, the elution is more complete, and the accuracy of the subsequent flux interception test is ensured.
Description
Technical Field
The invention belongs to the technical field of membrane yarn soaking and cleaning, and particularly relates to a device for quickly soaking and cleaning membrane yarns and a utilization method thereof.
Background
In order to ensure the stability of flux and performance of the hollow fiber membrane filaments before the assembly is manufactured or in the process of transportation and storage, the membrane filaments are generally required to be soaked with a humectant before being dried for packaging, so as to maintain the membrane pores of the hollow fiber membrane. After the humectant is soaked and the membrane silk is dried to a certain water content, the humectant needs to be quickly eluted from the membrane silk, so that the performance test of the subsequent membrane silk is not affected.
When the hollow fiber membrane silk is infiltrated and the humectant is eluted, a direct infiltration or flushing mode is generally adopted, for example, the utility model patent of Chinese utility model with publication number CN209934482U, namely, "an infiltration system of membrane silk infiltration device and applied with the infiltration system of the infiltration device", discloses such a membrane silk infiltration device, which comprises a box body with a hollow inner cavity, wherein the humectant used for infiltrating the membrane silk is contained in the inner cavity of the box body, the box body is provided with an inflow port used for adding the humectant into the inner cavity of the box body and an outflow port used for enabling the humectant to flow out of the box body, the outflow port and the inflow port are communicated through a circulating pipeline, and the circulating pipeline is provided with a centrifugal pump used for returning the humectant flowing out of the box. The utility model discloses a set up circulating line and centrifugal pump, the centrifugal pump is sucked the humectant in to the box for inside the humectant can permeate the every membrane silk of entering fast, be superior to the long-time free diffusion of static soaked molecule, thereby greatly reduce soak time, improve test efficiency. However, rapid replacement of the membrane filament central tube and an external solution is difficult to realize by the manner of soaking and washing in the device, and generally, soaking and washing time is different from 5-24 hours, which greatly influences research, development and production speed.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a device capable of rapidly infiltrating and cleaning membrane filaments in view of the above-mentioned prior art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a device of quick infiltration and washing membrane silk which characterized in that: comprises that
The box body is a hollow structure for containing ionic moisturizing solution or pure water;
at least two electrode plates are arranged in the box body at intervals;
the direct current power supply is used for cleaning and supplying power and is connected with the electrode plate; the direct current power supply is provided with a first switch; and
the alternating current power supply is used for supplying power in an infiltration mode and is connected with the electrode plate; and a second switch is arranged on the alternating current power supply.
In order to avoid the membrane filaments from floating in disorder in the solution, the membrane filament floating device preferably further comprises a net sleeve which is arranged in the box body and used for placing the membrane filaments; the net sleeve is positioned between the electrode plates.
The second technical problem to be solved by the present invention is to provide a method for utilizing a device capable of rapidly infiltrating and cleaning membrane filaments in view of the above-mentioned current state of the art.
The technical scheme adopted by the invention for solving the second technical problem is as follows: a utilization method of a device for quickly infiltrating and cleaning membrane yarns is characterized by comprising the following steps: when the membrane filaments need to be soaked, the box body is filled with ionic moisturizing solution, and the membrane filaments are placed between the electrode plates; pressing a second switch to switch on an alternating current power supply, and continuously switching the cathode and the anode by the electrode plate to drive positive and negative ions in the ionic moisturizing solution to move and accelerate the ionic moisturizing agent to permeate into the central tube of the membrane wire;
when the membrane filaments need to be cleaned, pure water is filled in the box body, and the membrane filaments are placed between the electrode plates; pressing a first switch to switch on a direct current power supply; and positive and negative ions in the membrane filament central tube are respectively attracted to the cathode plate and the anode plate, so that the ionic humectant is quickly eluted.
Preferably, the ionic moisturizing solution consists of an ionic moisturizing agent and water; the ionic humectant is at least one selected from calcium chloride, sodium chloride, potassium chloride, sodium nitrate, sodium sulfate and sodium phosphate, the mass fraction of the ionic humectant is 5-50%, and the balance is water. Calcium chloride, sodium chloride, potassium chloride, sodium nitrate, sodium sulfate and sodium phosphate are strong electrolytes or ions with high valence state after ionization in water, and the strong electrolytes and the ions with high valence state after ionization in water move faster in an electric field, so that the humectant can enter membrane filaments quickly. When the content of the ionic humectant is less than 5 wt%, the moisturizing effect is poor, and when the content of the ionic humectant is more than 50 wt%, the structure of the membrane yarn is damaged, and the performance of the membrane yarn is influenced.
Preferably, the electrode plate contains a carbon material selected from at least one of activated carbon powder, activated carbon fiber, carbon nanotube, and graphene. The active carbon, the carbon nano tube and the graphene have large specific surface area and adsorption capacity, so that the ion adsorbent has a good adsorption effect on ions in water. When direct current is applied, the surface of the electrode is charged and adsorbs opposite charges, so that ions can be favorably migrated from the central tube of the hollow fiber membrane, and the cleaning of the membrane filaments is accelerated; when an alternating current is applied, the surface of the electrode is charged, and the anion and cation in the water are continuously adsorbed and desorbed, so that the rapid migration of the anion and cation is facilitated, and the infiltration of the ionic humectant on the membrane silk is accelerated.
Preferably, the voltage range of the alternating current power supply is 0.5-100V; the distance between the electrode plates is 15-25 cm.
Preferably, the voltage range of the direct current power supply is 0.5-100V; the distance between the electrode plates is 15-25 cm.
The voltage setting and the distance between the electrode plates have synergistic effect, so that the rapid migration of particles is improved, the water ionization is avoided, and the production safety is improved.
Preferably, the membrane filaments are one of microfiltration membranes, ultrafiltration membranes and nanofiltration membranes, and the material of the membrane filaments is one of polyvinylidene fluoride, polyvinyl chloride, polyether sulfone, polysulfone and polyacrylonitrile. The utilization method of the device for quickly infiltrating and cleaning the membrane filaments is suitable for membrane filaments with different membrane holes and various materials.
In order to prevent bacteria from breeding on the membrane yarns, bactericides are generally loaded on the surfaces of the membrane yarns or bactericides are added in water, but the difficulty of the production process is greatly increased by loading the bactericides on the surfaces of the membrane yarns. Preferably, when the membrane filaments need to be sterilized, a sodium chloride solution with the mass fraction of 0.1-20% is filled in the box body, and the membrane filaments are placed between the electrode plates; pressing a first switch to switch on a direct current power supply; the membrane filaments are sterilized by hypochlorous acid generated in the solution.
Compared with the prior art, the invention has the advantages that: 1. through an external alternating current electric field, ions in the ionic moisturizing agent move in the solution, so that the replacement of water in the membrane filament central tube and external ions is accelerated, the time for soaking the ionic moisturizing solution is shortened, and the production efficiency is improved.
2. Through the external direct current electric field, the ordered movement of ions in the ionic humectant in the membrane silk central tube in water is accelerated, the rapid elution of the ions is realized, the elution is more complete, and the accuracy of the subsequent flux interception test is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Fig. 1 shows a device for rapidly infiltrating and cleaning membrane filaments, which comprises a box body 1, an electrode plate 2, a direct current power supply 3, an alternating current power supply 4 and a net cover 5.
The box body 1 is a hollow structure for holding ionic moisturizing solution or pure water.
The electrode plates 2 are arranged in the box body 1 at intervals; the number of the electrode plates 2 is 5 in this embodiment, and the electrode plates are arranged in parallel at intervals.
The direct current power supply 3 is connected with the electrode plate 2; the dc power supply 3 is provided with a first switch 31.
The alternating current power supply 4 is connected with the electrode plate 2; the ac power supply 4 is provided with a second switch 41.
The net cover 5 is arranged in the box body 1 for placing the membrane wires, and the net cover 5 is positioned between the electrode plates 2.
The invention provides 5 examples and 2 comparative examples, the membrane filaments of examples 1 to 5 are infiltrated and cleaned by the device and the utilization method of the invention, and the specific parameter settings are shown in table 1.
When the membrane filaments need to be soaked, the box body 1 is filled with ionic moisturizing solution, and the membrane filaments are placed between the electrode plates 2; pressing the second switch 41 to connect the AC power supply 4, the electrode plate 2 switches the cathode and the anode continuously to drive the positive and negative ions in the ionic moisturizing solution to move, and the penetration of the ionic moisturizing agent into the membrane filaments is accelerated.
When membrane filaments need to be cleaned, pure water is filled in the box body 1, and the membrane filaments are placed between the electrode plates 2; pressing the first switch 31 turns on the dc power supply 3; and positive and negative ions in the membrane filament central tube are respectively attracted to the cathode plate and the anode plate, so that the ionic humectant is quickly eluted.
When the membrane filaments need to be sterilized, a sodium chloride solution with the mass fraction of 0.1-20% is filled in the box body 1, and the membrane filaments are placed between the electrode plates 2; pressing the first switch 31 turns on the dc power supply 3; the membrane filaments are sterilized by hypochlorous acid generated in the solution.
The comparative example 1 is different from the example 1 in that the voltage is less than 5V and the electrode plate interval is more than 25cm, and the soaking time and the cleaning time are obviously improved.
Comparative example 2 is different from example 1 in that the concentration of the humectant of the ionic humectant is less than 5 wt%, and the soaking time and the rinsing time are remarkably increased.
TABLE 1 parameter control and Performance parameters of examples and comparative examples
Claims (9)
1. The utility model provides a device of quick infiltration and washing membrane silk which characterized in that: comprises that
The box body (1), the box body (1) is a hollow structure for containing ionic moisturizing solution or pure water;
at least two electrode plates (2) are arranged in the box body (1) at intervals;
the direct current power supply (3) is used for cleaning and supplying power and is connected with the electrode plate (2); a first switch (31) is arranged on the direct current power supply (3); and
the alternating current power supply (4) is used for supplying power in an infiltration manner and is connected with the electrode plate (2); and a second switch (41) is arranged on the alternating current power supply (4).
2. The device for rapidly infiltrating and cleaning membrane yarn according to claim 1, wherein: the film silk inserting device also comprises a net sleeve (5) which is arranged in the box body (1) and used for inserting the film silk; the net sleeve (5) is positioned between the electrode plates (2).
3. The method for utilizing the device for rapidly infiltrating and cleaning the membrane silk as claimed in any one of claims 1-2, which is characterized in that: when the membrane filaments need to be soaked, the box body (1) is filled with ionic moisturizing solution, and the membrane filaments are placed between the electrode plates (2); a second switch (41) is pressed to connect an alternating current power supply (4), the electrode plate (2) continuously switches the cathode and the anode to drive positive and negative ions in the ionic moisturizing solution to move, and the penetration of the ionic moisturizing agent into the central tube of the membrane yarn is accelerated;
when the membrane filaments need to be cleaned, pure water is filled in the box body (1), and the membrane filaments are placed between the electrode plates (2); pressing a first switch (31) to turn on a direct current power supply (3); and positive and negative ions in the membrane filament central tube are respectively attracted to the cathode plate and the anode plate, so that the ionic humectant is quickly eluted.
4. The method for utilizing the device for rapidly infiltrating and cleaning membrane yarns according to claim 3, wherein the device comprises: the ionic moisturizing solution consists of an ionic moisturizing agent and water; the ionic humectant is at least one selected from calcium chloride, sodium chloride, potassium chloride, sodium nitrate, sodium sulfate and sodium phosphate, the mass fraction of the ionic humectant is 5-50%, and the balance is water.
5. The method for utilizing the device for rapidly infiltrating and cleaning membrane yarns according to claim 3, wherein the device comprises: the electrode plate (2) contains a carbon material selected from at least one of activated carbon powder, activated carbon fiber, carbon nanotube, and graphene.
6. The method for utilizing the device for rapidly infiltrating and cleaning membrane yarns according to claim 3, wherein the device comprises: the voltage range of the alternating current power supply is 0.5-100V; the distance between the electrode plates (2) is 15-25 cm.
7. The method for utilizing the device for rapidly infiltrating and cleaning membrane yarns according to claim 3, wherein the device comprises: the voltage range of the direct current power supply is 0.5-100V; the distance between the electrode plates (2) is 15-25 cm.
8. The method for utilizing the device for rapidly infiltrating and cleaning membrane yarns according to claim 3, wherein the device comprises: the membrane wire is one of a microfiltration membrane, an ultrafiltration membrane and a nanofiltration membrane, and is made of one of polyvinylidene fluoride, polyvinyl chloride, polyether sulfone, polysulfone and polyacrylonitrile.
9. The method for utilizing the device for rapidly infiltrating and cleaning membrane yarns according to claim 3, wherein the device comprises: when the membrane filaments need to be sterilized, a sodium chloride solution with the mass fraction of 0.1-20% is filled in the box body (1), and the membrane filaments are placed between the electrode plates (2); pressing a first switch (31) to turn on a direct current power supply (3); the membrane filaments are sterilized by hypochlorous acid generated in the solution.
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| CN202011005165.XA CN112316732B (en) | 2020-09-22 | 2020-09-22 | Device for rapidly infiltrating and cleaning membrane yarns and utilization method thereof |
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| CN202011005165.XA CN112316732B (en) | 2020-09-22 | 2020-09-22 | Device for rapidly infiltrating and cleaning membrane yarns and utilization method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115025624A (en) * | 2022-07-26 | 2022-09-09 | 浙江易膜新材料科技有限公司 | Preparation and application method of dry hollow fiber ultrafiltration membrane filaments |
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