CN111167315A - Drying regeneration method of reverse osmosis moisture permeable film - Google Patents
Drying regeneration method of reverse osmosis moisture permeable film Download PDFInfo
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- CN111167315A CN111167315A CN202010006810.3A CN202010006810A CN111167315A CN 111167315 A CN111167315 A CN 111167315A CN 202010006810 A CN202010006810 A CN 202010006810A CN 111167315 A CN111167315 A CN 111167315A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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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- 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
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- 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
- B01D2321/16—Use of chemical agents
- B01D2321/162—Use of acids
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- 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
- B01D2321/16—Use of chemical agents
- B01D2321/164—Use of bases
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- 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
- B01D2321/16—Use of chemical agents
- B01D2321/166—Use of enzymatic agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a drying regeneration method of a reverse osmosis moisture permeable membrane, which comprises the steps of preparing a cleaning solution, cleaning the cleaning solution, cleaning with pure water and drying; the cleaning solution is prepared by mixing sodium hypochlorite, hydrogen peroxide, oxalic acid, ammonium hydroxide, proteolytic enzyme, cellulase, isooctanol polyoxyethylene ether and demineralized water, can react with organic matters and colloids on the surface of the reverse osmosis wet membrane and remove dissolved water, hydrolyzes bacteria and microorganisms on the surface of the wet membrane, and avoids the damage of the microorganisms to a membrane element; and cleaning with cleaning liquid, cleaning with pure water and drying by a drying and regenerating system. The method has high cleaning and drying efficiency, and improves the use efficiency of the reverse osmosis wet membrane; the removal rate of sodium chloride of the regenerated reverse osmosis wet membrane reaches 94.8-95.5 percent, the removal rate of magnesium sulfate reaches 97.5-98.1 percent, and the water yield reaches 88-92 L.m‑2·h‑1The salt removal rate and the water flux both reach or exceed the level of the prior art, and the method is suitable for large-scale industrial application.
Description
Technical Field
The invention relates to the technical field of reverse osmosis membrane regeneration treatment, in particular to a drying regeneration method of a reverse osmosis wet membrane.
Background
The reverse osmosis technology is a membrane separation and filtration technology using pressure difference as power, the aperture of a reverse osmosis membrane is as small as a nanometer level, water ions can pass through the reverse osmosis membrane under certain pressure, and impurities such as inorganic salt, heavy metal ions, organic matters, colloid, bacteria, viruses and the like in raw water cannot pass through the reverse osmosis membrane, so that permeable pure water and impermeable concentrated water are strictly distinguished. The reverse osmosis technology has the outstanding characteristics of simple equipment, mild operation conditions, large treatment capacity, high separation efficiency and the like, and is widely applied and valued in the fields of seawater desalination, reclaimed water reuse, clean production, drinking water purification and the like.
In the using process of the reverse osmosis membrane, impurities in the cleaning solution are intercepted on the surface of the membrane, so that a pollution layer is formed on the surface of the membrane, and the main pollution modes comprise colloid pollution, scaling, biological pollution, chemical pollution and organic pollution, so that the permeation flux is obviously reduced, and the operation cost and the energy consumption are increased. At present, membrane pollution is reduced and permeation flux is improved mainly by membrane cleaning and drying. Reverse osmosis membrane includes wet membrane and dry film, and the difference mainly lies in: 1) storage and packaging modes: packaging the wet film in a dry film vacuum mode, wherein the wet film needs a protective solution for packaging; 2) temperature requirements are as follows: the wet film needs to be stored at the temperature of more than 5 ℃, and can be damaged when the temperature is lower than 5 ℃; 3) the filling and using mode is as follows: when the wet membrane is used, the wet membrane is put into a reverse osmosis membrane shell and is washed for 10-20 minutes, and the protective solution is washed away, so that the wet membrane can be effectively used; when the dry film is used, the dry film is put into a film shell and then needs to be soaked in clear water for 10-20 minutes to ensure the effect.
The prior art (201510150673.X) discloses a waste reverse osmosis membrane regeneration process and combined equipment, which take a waste reverse osmosis winding shaft as a raw material, select a chemical cleaning process and a coating paste repairing process by optimization, and design a special disassembly and cleaning table, a membrane rolling machine, a winding machine and a drying machine for reverse osmosis membrane repair. Through implementation, the salt rejection rate can reach more than 90 percent, and the flux is 1.0/m3H or more, and can be widely applied to wastewater treatment and reuse engineering. The following technical problems exist: 1) the cleaning and drying efficiency is low, the processing cost is high, the use efficiency of the reverse osmosis wet membrane is reduced, and the method is not suitable for large-scale industrial application; 2) in the cleaning process, the flow of cleaning liquid or pure water cannot be adjusted according to the quantity of the reverse osmosis wet membranes to be processed, and the processing adjustability is low; 3) medicine for treating acute respiratory syndromeIn the washing and drying process, the contact area between the cleaning solution or pure water and the wet film is small, and the residual cleaning solution or water cannot be quickly removed in the drying process.
Disclosure of Invention
In order to solve the above-mentioned technical problems, an object of the present invention is to provide a method for drying and regenerating a reverse osmosis moisture permeable film.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a drying regeneration method of a reverse osmosis moisture permeable membrane, which is completed by a drying regeneration system and specifically comprises the following steps:
s1, preparing a cleaning solution: weighing 0.2-0.5 part of sodium hypochlorite, 1-3 parts of hydrogen peroxide, 1-3 parts of oxalic acid, 5-8 parts of ammonium hydroxide, 0.2-0.5 part of proteolytic enzyme, 0.1-0.3 part of cellulase, 0.2-0.5 part of isooctanol polyoxyethylene ether and 250-320 parts of desalted water according to the parts by mass, uniformly stirring at normal temperature to obtain a cleaning solution, and filling the cleaning solution into a solution tank for later use;
s2, cleaning with cleaning liquid: winding a plurality of reverse osmosis wet membranes to be cleaned on a winding shaft, and putting the reverse osmosis wet membranes above a membrane element placing frame in a drying and regenerating system; opening a first pressure regulating valve and a first check valve, enabling the cleaning liquid in the solution tank to flow into a liquid inlet pipeline from a liquid outlet, filtering by a filter, and enabling the cleaning liquid to flow into membrane cleaning and drying equipment through the first pressure regulating valve and the first check valve; after entering from the upper part of the liquid inlet cover, cleaning liquid falls into the main body mounting frame along the uniformly distributed leakage holes, a first servo motor is started, an output shaft of the first servo motor drives a first lead screw to rotate, a first gear and a second gear rotate along with the first lead screw, friction force drives a curtain to rotate, the obliquely arranged curtain enables the cleaning liquid to slide to the central position of the middle plate, the cleaning liquid drips along the liquid dripping holes in the central position, and the reverse osmosis moisture permeable membrane to be cleaned is cleaned;
s3, pure water cleaning: opening the third check valve, allowing pure water to flow into the membrane cleaning and drying equipment from the pure water tank and the pure water pipeline, dripping along the leakage hole and the drip hole, and cleaning the reverse osmosis moisture permeable membrane to be cleaned;
s4, drying: after the membrane element placing frame is cleaned, the valve is closed, the second servo motor is started, the second lead screw is driven to rotate by positive and negative rotation of the second servo motor, the third gear drives the straight rack which is meshed with the third gear to move horizontally, the membrane element placing frame moves horizontally left and right along with the third gear, the winding shaft swings regularly on the membrane element placing frame, and the reverse osmosis moisture permeable membrane throws out water to dry.
As a further scheme of the invention, the cleaning time of the cleaning solution is 15-30min, and the temperature is normal temperature; the pure water cleaning time is 10-20min, and the temperature is normal temperature.
As a further scheme of the invention, the drying and regenerating system comprises a solution tank, a liquid inlet pipeline, membrane cleaning and drying equipment and a liquid return pipeline, wherein a liquid outlet at the bottom of the solution tank is connected with the membrane cleaning and drying equipment through the liquid inlet pipeline and a filter, and a liquid inlet at the top of the solution tank is connected with the membrane cleaning and drying equipment through the liquid return pipeline;
the membrane cleaning and drying equipment comprises a liquid inlet cover, a main body installation frame, a membrane element placing frame and a bottom plate frame which are arranged from top to bottom, wherein the liquid inlet cover is in a cavity funnel shape with a narrow top and a wide bottom, and the upper end of the liquid inlet cover is communicated with a liquid inlet pipeline;
the membrane element placing frame is a rectangular plate, the top of the membrane element placing frame is provided with a plurality of winding shafts wound with reverse osmosis moisture permeable membranes, and the size of the membrane element placing frame is smaller than that of the main body mounting frame; the membrane element placing frame is provided with a waste liquid hole penetrating through the membrane element placing frame.
As a further scheme of the invention, the main body installation frame is arranged below the liquid inlet cover, the tops of two sides of the main body installation frame are provided with symmetrical limiting structures, a leakage orifice plate is arranged in the main body installation frame, the bottom of the leakage orifice plate is provided with the middle plate and the rotating mechanism, the liquid inlet cover covers the top of the leakage orifice plate, and the leakage orifice plate is uniformly provided with leakage orifices penetrating through the leakage orifice plate.
As a further aspect of the present invention, the rotation mechanism includes: the device comprises a first servo motor, a first lead screw, a first gear, a second gear and a curtain, wherein the first servo motor is arranged at two ends of a middle plate; the middle plate is provided with a liquid dropping hole penetrating through the middle plate, the inner cavity of the middle plate is provided with a curtain rotating cavity, and the curtain rotates around the curtain rotating cavity and is supported by a roll shaft arranged above the middle plate; the outer sides of the first gear and the second gear are in rolling friction contact with the surface of the curtain.
As a further scheme of the invention, a first pressure regulating valve and a first check valve are arranged between the filter and the membrane cleaning and drying equipment, and the first pressure regulating valve is far away from the filter; and a second pressure regulating valve and a second check valve are arranged between the liquid inlet and the membrane cleaning and drying equipment, the second pressure regulating valve is far away from the solution tank, and the top of the membrane cleaning and drying equipment is connected with the pure water tank through a pure water pipeline and a third check valve.
As a further scheme of the invention, two straight racks are arranged at the bottom of the membrane element placing frame in parallel, a second lead screw is arranged on the vertical surface of each straight rack, a third gear meshed with the straight racks is arranged on the second lead screw, and a second servo motor for driving the second lead screw to rotate is arranged at one end of the second lead screw; the bottom plate frame covers the bottom of the membrane element placing frame and is provided with a through hole in a penetrating mode.
The invention has the beneficial effects that:
1. the drying regeneration method of the reverse osmosis moisture permeable membrane comprises the steps of preparing a cleaning solution, cleaning the cleaning solution, cleaning with pure water and drying; the cleaning solution is prepared by mixing oxidants of sodium hypochlorite and hydrogen peroxide, acidic solvent of oxalic acid, alkaline solvent of ammonium hydroxide, proteolytic enzyme, cellulase, nonionic surfactant of isooctanol polyoxyethylene ether and demineralized water, wherein the oxidants and the acidic and alkaline solvents are matched with the nonionic surfactant and can react with organic matters and colloids on the surface of the reverse osmosis wet membrane and dissolve water for removal, and the proteolytic enzyme and the cellulase can hydrolyze bacteria and microorganisms on the surface of the wet membrane and avoid the damage of the microorganisms to a membrane element; the cleaning solution in the solution tank is filtered by a filter and then enters a membrane cleaning and drying device to clean the reverse osmosis moisture permeable membrane to be cleaned, the waste liquid generated by cleaning can enter the solution tank to be continuously filtered and cleaned, and the waste liquid is not in line with cleaningDischarging after solving; pure water enters membrane cleaning and drying equipment through a pure water pipeline, and a reverse osmosis moisture permeable membrane to be cleaned is cleaned; the cleaning solution is filtered and cleaned for multiple times, so that the cost of cleaning a wet membrane is saved, the automatic processes of conveying, filtering, collecting and purifying the cleaning solution are realized, the cleaning and drying efficiency of the method is high, the processing cost is low, and the use efficiency of the reverse osmosis wet membrane is improved; the removal rate of sodium chloride of the regenerated reverse osmosis wet membrane reaches 94.8-95.5 percent, the removal rate of magnesium sulfate reaches 97.5-98.1 percent, and the water yield reaches 88-92m3The salt removal rate and the water flux of the catalyst reach or exceed the level of the prior art, and the catalyst is suitable for large-scale industrial application.
2. In the cleaning process, after cleaning liquid introduced into the liquid inlet pipeline enters from the upper part of the liquid inlet cover, the cleaning liquid falls into the main body mounting frame along the uniformly distributed leakage holes, an output shaft of the first servo motor drives the first lead screw to rotate, the first gear and the second gear drive the curtain to rotate through friction force, the curtain which is rotatably and obliquely arranged around the curtain rotating cavity enables the cleaning liquid to slide to the central position of the middle plate, and the cleaning liquid drips along the liquid dripping holes in the central position; when the cleaning liquid with large flow rate falls from the leakage hole, the first servo motor can be closed and the curtain can be detached; the design of intermediate lamella and revolution mechanic makes things convenient for according to the wet membrane quantity of reverse osmosis of treating processing, adjusts the flow of the washing liquid or the pure water that drip from the drip hole, and the processing controllability is high.
3. In the washing and drying process, the second lead screw is driven to rotate through positive and negative rotation of the second servo motor, the third gear drives the straight rack which is meshed with the third gear to move horizontally, the frame is placed on the film element to move horizontally along with the frame, the winding shaft swings regularly on the frame is placed on the film element, on one hand, the contact area between the washing liquid or the pure water and the wet film is increased when the film element is washed, on the other hand, the residual washing liquid or the moisture can be thrown out when the film element is dried, and the washing efficiency and the drying efficiency are improved.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for drying and regenerating a reverse osmosis moisture permeable membrane of the present invention.
FIG. 2 is a schematic diagram of the dry regeneration system of the present invention.
Fig. 3 is a three-dimensional view of the membrane cleaning and drying apparatus of the present invention.
FIG. 4 is a schematic structural diagram of the membrane cleaning and drying device of the present invention after the liquid inlet hood is removed.
FIG. 5 is a front view of the membrane cleaning and drying apparatus of the present invention after removing the liquid inlet hood, the main body mounting frame and the bottom plate frame.
Fig. 6 is a partially enlarged view of a portion a in fig. 5.
FIG. 7 is another view of the membrane cleaning and drying apparatus of the present invention from a viewing angle after removing the liquid inlet hood, the main body mounting frame and the bottom plate frame.
FIG. 8 is a cross-sectional view of the membrane cleaning and drying apparatus of the present invention after removing the liquid inlet hood, the main body mounting frame, and the bottom plate frame.
In the figure: 1. a solution tank; 2. a liquid inlet pipeline; 3. membrane cleaning and drying equipment; 4. a return line; 5. a filter; 6. a first pressure regulating valve; 7. a first check valve; 8. a second pressure regulating valve; 9. a second check valve; 10. a pure water line; 11. a liquid outlet; 12. a liquid inlet; 13. a third check valve; 14. a pure water tank; 15. reverse osmosis moisture permeable film; 16. a winding shaft; 31. a liquid inlet cover; 32. a main body mounting frame; 33. a membrane element placement frame; 34. a bottom plate frame; 35. a leak orifice plate; 36. a first servo motor; 37. a first lead screw; 38. a first gear; 39. a second gear; 40. a curtain; 41. a first lead screw nut seat; 42. a middle plate; 43. a drip hole; 44. a curtain rotation chamber; 45. a roll shaft; 46. a waste liquid hole; 47. a straight rack; 48. a second lead screw; 49. a third gear; 50. a second servo motor; 351. a weep hole; 321. a limiting plate; 322. and (5) fastening the screw rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 to 8, a method for drying and regenerating a wet reverse osmosis membrane of the present embodiment includes the following steps:
s1, preparing a cleaning solution: weighing 0.35 part of sodium hypochlorite, 1.6 parts of hydrogen peroxide, 2.5 parts of oxalic acid, 6.2 parts of ammonium hydroxide, 0.4 part of proteolytic enzyme, 0.16 part of cellulase, 0.4 part of isooctanol polyoxyethylene ether and 285 parts of desalted water according to the parts by mass, and uniformly stirring at normal temperature to obtain a cleaning solution;
s2, cleaning with cleaning liquid: winding a plurality of reverse osmosis wet membranes 15 to be cleaned on a winding shaft 16, and putting the membranes above a membrane element placing frame 33 in a drying and regenerating system; opening a first pressure regulating valve 6 and a first check valve 7, enabling the cleaning liquid in the solution tank 1 to flow into the liquid inlet pipeline 2 from the liquid outlet 11, filtering by a filter 5, and enabling the cleaning liquid to flow into the membrane cleaning and drying equipment 3 through the first pressure regulating valve 6 and the first check valve 7; after entering from the upper part of the liquid inlet cover 31, the cleaning liquid falls into the main body mounting frame 32 along the uniformly distributed leakage holes 351, the first servo motor 36 is started, the output shaft of the first servo motor 36 drives the first lead screw 37 to rotate, the first gear 38 and the second gear 39 rotate along with the first lead screw 37, the curtain 40 is driven by friction force to rotate, the obliquely arranged curtain 40 enables the cleaning liquid to slide to the central position of the middle plate 42, and the cleaning liquid drips along the drip hole 43 at the central position to clean the reverse osmosis wet film 15 to be cleaned; the cleaning time of the cleaning solution is 15-30min, and the temperature is normal temperature.
S3, pure water cleaning: opening the third check valve 13, allowing pure water to flow into the membrane cleaning and drying device from the pure water tank 14 and the pure water pipeline 10, dripping along the leakage hole 351 and the drip hole 43, and cleaning the reverse osmosis wet membrane 15 to be cleaned; the pure water cleaning time is 10-20min, and the temperature is normal temperature.
S4, drying: after the cleaning is finished, the valve is closed, the second servo motor 50 is started, the second lead screw 48 is driven to rotate by the forward and reverse rotation of the second servo motor 50, the third gear 49 drives the straight rack 47 meshed with the third gear to horizontally move, the membrane element placing frame 33 horizontally moves left and right, the winding shaft 16 regularly swings on the membrane element placing frame 33, and the reverse osmosis moisture permeable membrane 15 throws out moisture for drying.
Example 2
This example differs from example 1 in that the cleaning liquid preparation at step S1: weighing 0.4 part of sodium hypochlorite, 2.2 parts of hydrogen peroxide, 2.5 parts of oxalic acid, 7 parts of ammonium hydroxide, 0.5 part of proteolytic enzyme, 0.22 part of cellulase, 0.4 part of isooctanol polyoxyethylene ether and 310 parts of desalted water according to the parts by mass, and uniformly stirring at normal temperature to obtain the cleaning solution.
Example 3
This example differs from example 1 in that the cleaning liquid preparation at step S1: weighing 0.5 part of sodium hypochlorite, 3 parts of hydrogen peroxide, 2.4 parts of oxalic acid, 6 parts of ammonium hydroxide, 0.5 part of proteolytic enzyme, 0.3 part of cellulase, 0.4 part of isooctanol polyoxyethylene ether and 315 parts of desalted water according to the parts by mass, and uniformly stirring at normal temperature to obtain the cleaning solution.
Testing the performance of the regenerated reverse osmosis wet membrane:
and (3) detecting the sodium chloride removal rate, the magnesium sulfate removal rate and the water yield of the regenerated reverse osmosis moisture permeable membrane through a cross flow permeation test. The salt removal rate was: under certain operating conditions, the difference between the salt concentration of the feed solution and the salt concentration of the permeate is divided by the salt concentration of the feed solution. The water flux is: the volume of water per unit time that permeates the membrane under certain operating conditions is expressed in L.m-2·h-1。
The feed conditions were 1000ppm aqueous sodium chloride or magnesium sulfate, the operating pressure was 150psi, the operating temperature was 25 deg.C, the pH of the solution was 6.8, and the results are shown in the following table:
as shown in the table, the reverse osmosis wet membrane after drying and regeneration has the sodium chloride removal rate of 94.8-95.5 percent, the magnesium sulfate removal rate of 97.5-98.1 percent and the water yield per hour of 88-92 L.m-2·h-1The salt removal rate and the water flux both reach or exceed the level of the prior art, and the method is suitable for large-scale industrial application.
Example 4
Referring to fig. 1-8, the embodiment provides a drying and regenerating system, which includes a solution tank 1, a liquid inlet pipeline 2, a membrane cleaning and drying device 3, and a liquid return pipeline 4, wherein a liquid outlet 11 at the bottom of the solution tank 1 is connected to the membrane cleaning and drying device 3 through the liquid inlet pipeline 2 and a filter 5, and a liquid inlet 12 at the top of the solution tank 1 is connected to the membrane cleaning and drying device 3 through the liquid return pipeline 4. The filter 5 is a conventional commercially available activated carbon filter. A first pressure regulating valve 6 and a first check valve 7 are arranged between the filter 5 and the membrane cleaning and drying device 3, and the first pressure regulating valve 6 is far away from the filter 5; a second pressure regulating valve 8 and a second check valve 9 are arranged between the liquid inlet 12 and the membrane cleaning and drying device 3, the second pressure regulating valve 8 is far away from the solution tank 1, and the top of the membrane cleaning and drying device 3 is connected with a pure water tank 14 through a pure water pipeline 10 and a third check valve 13. Through the design of the structure and the connection relation, the drying and regenerating system enables cleaning liquid in the solution tank 1 to enter membrane cleaning and drying equipment after being filtered by the filter 5, the reverse osmosis moisture permeable membrane to be cleaned is cleaned, waste liquid generated by cleaning can enter the solution tank 1 to be continuously filtered and cleaned, and the waste liquid is discharged after the waste liquid does not meet the cleaning requirement; pure water enters membrane cleaning and drying equipment through a pure water pipeline, and a reverse osmosis moisture permeable membrane to be cleaned is cleaned; the repeated filtration and cleaning of the cleaning solution saves the cost of wet film cleaning, realizes the automatic processes of cleaning solution transportation, filtration, collection and purification, and improves the regeneration processing efficiency of the reverse osmosis moisture permeable film.
The membrane cleaning and drying equipment 3 comprises a liquid inlet cover 31, a main body installation frame 32, a membrane element placing frame 33 and a bottom plate frame 34 which are arranged from top to bottom, wherein the liquid inlet cover 31 is in a cavity funnel shape with a narrow top and a wide bottom, and the upper end of the liquid inlet cover is communicated with the liquid inlet pipeline 2; the below of feed liquor cover 31 is located to main part installing frame 32, and the bilateral top symmetry limit structure of main part installing frame 32, inside are equipped with seepage orifice plate 35, and the bottom of seepage orifice plate 35 is equipped with intermediate lamella 42 and rotary mechanism, and feed liquor cover 31 lid closes at the top of seepage orifice plate 35, and evenly distributed has the seepage hole 351 that runs through seepage orifice plate 35 on the seepage orifice plate 35. The limiting structure comprises two limiting plates 321 arranged at the tops of two sides of the main body mounting frame 32, a fastening screw 322 is connected between the two limiting plates 321, and the limiting plates 321 are used for clamping and covering the liquid inlet cover 31.
The rotating mechanism includes: the curtain comprises a first servo motor 36, a first lead screw 37, a first gear 38, a second gear 39 and a curtain 40, wherein the first servo motor 36 is arranged at two ends of an intermediate plate 42, an output shaft of the first servo motor 36 is connected with the first lead screw 37, the other end of the first lead screw 37 is connected with a first lead screw nut seat 41, the first gear 38 is coaxially arranged at the end, close to the first servo motor 36, of the first lead screw 37, and the second gear 39 is coaxially arranged at the end, close to the first lead screw nut seat 41, of the first lead screw 37. The middle plate 42 is provided with a dripping hole 43 penetrating the middle plate 42, the inner cavity of the middle plate 42 is provided with a curtain rotating cavity 44, the curtain 40 rotates around the curtain rotating cavity 44 and is supported by a roller shaft 45 arranged above the middle plate 42, the curtain 40 above the curtain rotating cavity 44 is obliquely and upwards arranged from the center to the outer side, and the included angle between the curtain 40 and the horizontal plane of the middle plate 42 is 30-60 degrees. The outer sides of the first gear 38 and the second gear 39 are in rolling frictional contact with the surface of the curtain 40.
When cleaning liquid introduced into the liquid inlet pipeline 2 enters from the upper part of the liquid inlet cover 31, the cleaning liquid falls into the main body mounting frame 32 along the uniformly distributed leakage holes 351, the first servo motor 36 is started, the output shaft of the first servo motor 36 drives the first lead screw 37 to rotate, the first gear 38 and the second gear 39 rotate along with the first lead screw 37, the curtain 40 is driven by friction force to rotate, the curtain 40 rotates around the curtain rotating cavity 44 and is supported by the roller shaft 45 arranged above the middle plate 42, the obliquely arranged curtain 40 enables the cleaning liquid to slide to the central position of the middle plate 42 and drop along the liquid dropping hole 43 at the central position; when a large flow of cleaning fluid is required to fall from the weep hole 351, the first servomotor 36 can be turned off and the curtain 40 can be removed, and the large flow of cleaning fluid drops from the entire weep hole 43 of the middle plate 42. The design of intermediate lamella and revolution mechanic makes things convenient for according to the wet membrane quantity of reverse osmosis of treating processing, adjusts the flow of the washing liquid or the pure water that drip from the drip hole, and the processing controllability is high.
The membrane element housing frame 33 is a rectangular parallelepiped plate, the top part of which houses a plurality of winding shafts 16 on which the reverse osmosis wet membranes 15 are wound, and the size of the membrane element housing frame 33 is smaller than that of the main body mounting frame 32. The membrane element placement frame 33 is provided with a waste liquid hole 46 penetrating the membrane element placement frame 33. The bottom of the membrane element placing frame 33 is provided with two straight racks 47 in parallel, a second lead screw 48 is arranged on the vertical surface of the straight racks 47, a third gear 49 meshed with the straight racks 47 is arranged on the second lead screw 48, and a second servo motor 50 for driving the second lead screw 48 to rotate is arranged at one end of the second lead screw 48. The bottom plate frame 34 covers the bottom of the membrane element placing frame 33 and is provided with a through hole in a penetrating way. The second screw 48 is driven to rotate by the positive and negative rotation of the second servo motor 50, so that the third gear 49 drives the straight rack 47 meshed with the third gear to horizontally move, the membrane element placing frame 33 horizontally moves left and right, and the winding shaft 16 regularly swings on the membrane element placing frame 33, so that the contact area between cleaning liquid or pure water and a wet membrane is increased during cleaning, residual cleaning liquid or water is favorably thrown out during drying, and the cleaning efficiency and the drying efficiency are improved.
The working method of the dry regeneration system of the embodiment specifically includes the following steps:
s1, winding and placing the reverse osmosis wet membrane: winding a plurality of reverse osmosis wet membranes 15 to be cleaned on a winding shaft 16, and placing the membranes above a membrane element placing frame 33;
s2, assembling of membrane cleaning and drying equipment: covering the main body installation frame 32 on the membrane element placing frame 33, covering the liquid inlet cover 31 on the main body installation frame 32, covering the bottom plate frame 34 on the bottom of the membrane element placing frame 33, and completing the assembly of the membrane cleaning and drying equipment 3;
s3, cleaning with cleaning liquid: opening a first pressure regulating valve 6 and a first check valve 7, enabling the cleaning liquid in the solution tank 1 to flow into the liquid inlet pipeline 2 from the liquid outlet 11, filtering by a filter 5, and enabling the cleaning liquid to flow into the membrane cleaning and drying equipment 3 through the first pressure regulating valve 6 and the first check valve 7; after entering from the upper part of the liquid inlet cover 31, the cleaning liquid falls into the main body mounting frame 32 along the uniformly distributed leakage holes 351, the first servo motor 36 is started, the output shaft of the first servo motor 36 drives the first lead screw 37 to rotate, the first gear 38 and the second gear 39 rotate along with the first lead screw 37, the curtain 40 is driven by friction force to rotate, the curtain 40 rotates around the curtain rotating cavity 44 and is supported by the roller shaft 45 arranged above the middle plate 42, the obliquely arranged curtain 40 enables the cleaning liquid to slide to the central position of the middle plate 42 and drip along the drip holes 43 at the central position, and the reverse osmosis wet film 15 to be cleaned is cleaned;
s4, pure water cleaning: opening the third check valve 13, allowing pure water to flow into the membrane cleaning and drying device from the pure water tank 14 and the pure water pipeline 10, and cleaning the reverse osmosis wet membrane 15 to be cleaned in the same process as S3;
s5, drying: after the cleaning is finished, the valve is closed, the second servo motor 50 is started, the second lead screw 48 is driven to rotate by the forward and reverse rotation of the second servo motor 50, the third gear 49 drives the straight rack 47 meshed with the third gear to horizontally move, the membrane element placing frame 33 horizontally moves left and right, the winding shaft 16 regularly swings on the membrane element placing frame 33, and the reverse osmosis moisture permeable membrane 15 throws out moisture for drying.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. A drying regeneration method of a reverse osmosis moisture permeable membrane is characterized in that the drying regeneration method is completed by a drying regeneration system, and specifically comprises the following steps:
s1, preparing a cleaning solution: weighing 0.2-0.5 part of sodium hypochlorite, 1-3 parts of hydrogen peroxide, 1-3 parts of oxalic acid, 5-8 parts of ammonium hydroxide, 0.2-0.5 part of proteolytic enzyme, 0.1-0.3 part of cellulase, 0.2-0.5 part of isooctanol polyoxyethylene ether and 250-320 parts of desalted water according to the parts by mass, uniformly stirring at normal temperature to obtain a cleaning solution, and filling the cleaning solution into a solution tank for later use;
s2, cleaning with cleaning liquid: winding a plurality of reverse osmosis moisture permeable films (15) to be cleaned on a winding shaft (16), and placing the film elements above a film element placing frame (33) in a drying and regenerating system; opening a first pressure regulating valve (6) and a first check valve (7), enabling cleaning liquid in the solution tank (1) to flow into the liquid inlet pipeline (2) from the liquid outlet (11), and enabling the cleaning liquid to flow into the membrane cleaning and drying equipment (3) through the first pressure regulating valve (6) and the first check valve (7) after being filtered by the filter (5); after entering from the upper part of the liquid inlet cover (31), cleaning liquid falls into the main body mounting frame (32) along the uniformly distributed leakage holes (351), the first servo motor (36) is started, the output shaft of the first servo motor (36) drives the first lead screw (37) to rotate, the first gear (38) and the second gear (39) rotate along with the first lead screw (37), the curtain (40) is driven to rotate by friction force, the obliquely arranged curtain (40) enables the cleaning liquid to slide to the central position of the middle plate (42), the cleaning liquid drips along the liquid dripping holes (43) at the central position, and the reverse osmosis moisture permeable membrane (15) to be cleaned is cleaned;
s3, pure water cleaning: opening the third check valve (13), allowing pure water to flow into the membrane cleaning and drying equipment from the pure water tank (14) and the pure water pipeline (10), dripping along the leakage hole (351) and the drip hole (43), and cleaning the reverse osmosis moisture permeable membrane (15) to be cleaned;
s4, drying: after the membrane element placing frame is cleaned, the valve is closed, the second servo motor (50) is started, the second lead screw (48) is driven to rotate by positive and negative rotation of the second servo motor (50), the third gear (49) drives the straight rack (47) meshed with the third gear to horizontally move, the membrane element placing frame (33) horizontally moves left and right along with the third gear, the winding shaft (16) regularly swings on the membrane element placing frame (33), and the reverse osmosis moisture permeable membrane (15) throws out moisture to dry.
2. The drying and regeneration method of the reverse osmosis moisture permeable membrane according to claim 1, characterized in that the cleaning time of the cleaning solution is 15-30min, and the temperature is normal temperature; the pure water cleaning time is 10-20min, and the temperature is normal temperature.
3. The drying and regeneration method of the reverse osmosis moisture permeable membrane according to claim 1, wherein the drying and regeneration system comprises a solution tank (1), a liquid inlet pipeline (2), a membrane cleaning and drying device (3) and a liquid return pipeline (4), a liquid outlet (11) at the bottom of the solution tank (1) is connected with the membrane cleaning and drying device (3) through the liquid inlet pipeline (2) and a filter (5), and a liquid inlet (12) at the top of the solution tank (1) is connected with the membrane cleaning and drying device (3) through the liquid return pipeline (4);
the membrane cleaning and drying equipment (3) comprises a liquid inlet cover (31), a main body installation frame (32), a membrane element placing frame (33) and a bottom plate frame (34) which are arranged from top to bottom, wherein the liquid inlet cover (31) is in a cavity funnel shape with a narrow top and a wide bottom, and the upper end of the liquid inlet cover is communicated with the liquid inlet pipeline (2);
the membrane element placing frame (33) is a rectangular plate, the top of the membrane element placing frame is provided with a plurality of winding shafts (16) wound with reverse osmosis moisture permeable membranes (15), and the size of the membrane element placing frame (33) is smaller than that of the main body mounting frame (32); the membrane element placement frame (33) is provided with a waste liquid hole (46) that penetrates the membrane element placement frame (33).
4. The drying and regeneration method of the reverse osmosis moisture permeable membrane according to claim 3, wherein the main body installation frame (32) is arranged below the liquid inlet cover (31), the top of the two sides of the main body installation frame (32) is provided with a symmetrical limiting structure, a seepage hole plate (35) is arranged inside the main body installation frame, the bottom of the seepage hole plate (35) is provided with a middle plate (42) and a rotating mechanism, the liquid inlet cover (31) covers the top of the seepage hole plate (35), and seepage holes (351) penetrating through the seepage hole plate (35) are uniformly distributed on the seepage hole plate (35).
5. The method for dry regeneration of reverse osmosis moisture permeable membrane according to claim 4, wherein the rotating mechanism comprises: the curtain comprises a first servo motor (36), a first lead screw (37), a first gear (38), a second gear (39) and a curtain (40), wherein the first servo motor (36) is arranged at two ends of a middle plate (42), an output shaft of the first servo motor (36) is connected with the first lead screw (37), the other end of the first lead screw (37) is connected with a first lead screw nut seat (41), the first gear (38) is coaxially arranged on the first lead screw (37) close to the first servo motor (36), and the second gear (39) is coaxially arranged on the first lead screw nut seat (41); the middle plate (42) is provided with a liquid dropping hole (43) penetrating through the middle plate (42), the inner cavity of the middle plate (42) is provided with a curtain rotating cavity (44), and the curtain (40) rotates around the curtain rotating cavity (44) and is supported by a roller shaft (45) arranged above the middle plate (42); the outer sides of the first gear (38) and the second gear (39) are in rolling friction contact with the surface of the curtain (40).
6. The dry regeneration method of reverse osmosis moisture permeable membrane according to claim 3, characterized in that a first pressure regulating valve (6) and a first check valve (7) are arranged between the filter (5) and the membrane cleaning and drying device (3), and the first pressure regulating valve (6) is far away from the filter (5); a second pressure regulating valve (8) and a second check valve (9) are arranged between the liquid inlet (12) and the membrane cleaning and drying equipment (3), the second pressure regulating valve (8) is far away from the solution tank (1), and the top of the membrane cleaning and drying equipment (3) is connected with a pure water tank (14) through a pure water pipeline (10) and a third check valve (13).
7. The drying and regeneration method of the reverse osmosis moisture permeable membrane according to claim 3, wherein the bottom of the membrane element placing frame (33) is provided with two straight racks (47) in parallel, a second lead screw (48) is arranged on the vertical surface of each straight rack (47), a third gear (49) meshed with the straight rack (47) is arranged on each second lead screw (48), and one end of each second lead screw (48) is provided with a second servo motor (50) for driving each second lead screw (48) to rotate; the bottom plate frame (34) covers the bottom of the membrane element placing frame (33) and is provided with a through hole in a penetrating way.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002346562A (en) * | 2001-05-25 | 2002-12-03 | Toshiba Plant Kensetsu Co Ltd | Method and apparatus for water treatment |
| JP2003001073A (en) * | 2001-06-15 | 2003-01-07 | Amtec Co Ltd | Method for cleaning separation membrane |
| US20090166291A1 (en) * | 2007-12-26 | 2009-07-02 | Jackson Paul H | Filtration of an aqueous process stream in polymer based particle production |
| CN102059056A (en) * | 2010-12-01 | 2011-05-18 | 浙江理工大学 | Nanofiltration reproduction method of waste reverse osmosis membrane element |
| CN102133505A (en) * | 2010-11-09 | 2011-07-27 | 浙江理工大学 | Enhanced cleaning method for reverse osmosis/nanofiltration membrane pollution |
| CN203955049U (en) * | 2014-06-30 | 2014-11-26 | 成都泰之源环保科技有限公司 | The regeneration of multifunctional mobile counter-infiltration system, cleaning device |
| CN105705220A (en) * | 2013-03-12 | 2016-06-22 | 艺康美国股份有限公司 | Surfactant blends for cleaning filtration membranes |
| WO2017002980A1 (en) * | 2015-06-29 | 2017-01-05 | 株式会社 Ｐｅｒｍｅａｔｉｏｎ | Yya-type water switch |
| CN206676377U (en) * | 2017-03-17 | 2017-11-28 | 广东环球净化科技有限公司 | Regenerative dryer system |
| CN108939923A (en) * | 2018-07-16 | 2018-12-07 | 安徽智泓净化科技股份有限公司 | A kind of reverse osmosis functional membrane of RO of high-throughput strong anti-pollution |
| CN110011612A (en) * | 2019-05-27 | 2019-07-12 | 合肥华盖光伏科技有限公司 | A kind of photovoltaic panel installation frame having both protection and cleaning function |
| CN110465198A (en) * | 2019-08-21 | 2019-11-19 | 安徽智泓净化科技股份有限公司 | A kind of ultrasonic wave of membrane module is just permeating on-line cleaning method and device |
-
2020
- 2020-01-03 CN CN202010006810.3A patent/CN111167315B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002346562A (en) * | 2001-05-25 | 2002-12-03 | Toshiba Plant Kensetsu Co Ltd | Method and apparatus for water treatment |
| JP2003001073A (en) * | 2001-06-15 | 2003-01-07 | Amtec Co Ltd | Method for cleaning separation membrane |
| US20090166291A1 (en) * | 2007-12-26 | 2009-07-02 | Jackson Paul H | Filtration of an aqueous process stream in polymer based particle production |
| CN102133505A (en) * | 2010-11-09 | 2011-07-27 | 浙江理工大学 | Enhanced cleaning method for reverse osmosis/nanofiltration membrane pollution |
| CN102059056A (en) * | 2010-12-01 | 2011-05-18 | 浙江理工大学 | Nanofiltration reproduction method of waste reverse osmosis membrane element |
| CN105705220A (en) * | 2013-03-12 | 2016-06-22 | 艺康美国股份有限公司 | Surfactant blends for cleaning filtration membranes |
| CN203955049U (en) * | 2014-06-30 | 2014-11-26 | 成都泰之源环保科技有限公司 | The regeneration of multifunctional mobile counter-infiltration system, cleaning device |
| WO2017002980A1 (en) * | 2015-06-29 | 2017-01-05 | 株式会社 Ｐｅｒｍｅａｔｉｏｎ | Yya-type water switch |
| CN206676377U (en) * | 2017-03-17 | 2017-11-28 | 广东环球净化科技有限公司 | Regenerative dryer system |
| CN108939923A (en) * | 2018-07-16 | 2018-12-07 | 安徽智泓净化科技股份有限公司 | A kind of reverse osmosis functional membrane of RO of high-throughput strong anti-pollution |
| CN110011612A (en) * | 2019-05-27 | 2019-07-12 | 合肥华盖光伏科技有限公司 | A kind of photovoltaic panel installation frame having both protection and cleaning function |
| CN110465198A (en) * | 2019-08-21 | 2019-11-19 | 安徽智泓净化科技股份有限公司 | A kind of ultrasonic wave of membrane module is just permeating on-line cleaning method and device |
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|---|---|
| CN111167315B (en) | 2020-12-01 |
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