CN112044271B - Preparation method of multilayer reverse osmosis composite membrane - Google Patents
Preparation method of multilayer reverse osmosis composite membrane Download PDFInfo
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Abstract
The invention belongs to the technical field of water treatment, and particularly relates to a preparation method of a multilayer reverse osmosis composite membrane, which comprises a shell, a water inlet pipe and a water outlet pipe; the shell is designed in an I shape; a pressurizing cavity is formed in the shell; one end of the shell is provided with a first groove; a second groove is formed in one end, far away from the first groove, of the shell; the first groove and the second groove are both in T-shaped design; the side walls of the first groove and the second groove are both in threaded design; the water inlet pipe is connected with the shell through the first groove; the invention makes the pressurizing plate rotate by using the impact effect of water flow to apply pressure to the water flow, thereby accelerating the water flow permeation efficiency, and simultaneously, the rotation of the rotating shaft makes the ultraviolet rays scattered by the ultraviolet lamp uniformly diffuse outwards, thereby effectively improving the purification effect of the photocatalyst material in the permeation bag on the permeation bag, and simultaneously, by arranging the protective layer, the separation layer is prevented from being directly impacted by the water flow, and the durability of the purification performance is effectively enhanced.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a preparation method of a multilayer reverse osmosis composite membrane.
Background
The reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics and prepared by simulating a biological semipermeable membrane, and is a core component of a reverse osmosis technology, the principle of the reverse osmosis technology is that under the action of osmotic pressure higher than that of a solution, other substances cannot permeate the semipermeable membrane to separate the substances from water, and membrane pollution in the prior art seriously restricts large-scale application and popularization of the reverse osmosis technology, particularly application in the fields of high-polluted water treatment, water reuse, chemical separation and the like, the membrane pollution directly causes the osmotic flux of the membrane to be obviously reduced, the production efficiency of a system is reduced, and the operation cost and energy consumption are increased; the membrane pollution still will lead to frequent washing of system, the device can not normal operation, the entrapment rate characteristic of membrane is serious to be deteriorated, product water quality of water worsens, the membrane life reduces and the frequent change of membrane, make through adding carbon nanotube in to the membrane at preparation reverse osmosis membrane among the prior art, graphite alkene, nanometer titanium dioxide, mode such as surface coating antibacterial agent plays membrane surface antibacterial effect, but because antibacterial substance coats in the rete surface rivers wash away the membrane surface in long-term use, lead to the additive to drop easily, simultaneously because reverse osmosis membrane is in under water operational environment for a long time, it can't effectual absorption ultraviolet to add granule such as nanometer titanium dioxide, therefore catalyst activity is lower, can't exert catalytic effect.
An antibacterial reverse osmosis composite membrane and a preparation method thereof, which are published in Chinese patent application No.: 2014105325137, the preparation method comprises: (1) contacting a porous support layer with an aqueous solution of a compound containing two or more reactive amino groups; (2) removing the redundant aqueous phase solution on the surface of the porous support layer soaked by the aqueous phase solution; (3) contacting the porous supporting layer treated in the step (2) with an organic phase solution of an acyl chloride compound containing two or more acyl chloride groups; (4) after the organic solvent on the surface of the membrane in the step (3) is volatilized, the membrane is contacted with a compound containing two or more than two reactive amino groups and an aqueous solution of attapulgite modified by chitosan quaternary ammonium salt; (5) the antibacterial reverse osmosis composite membrane is prepared after heat treatment and water washing, and the antibacterial performance of the reverse osmosis composite membrane is improved; on the basis of keeping the flux equivalent, the salt rejection rate of the reverse osmosis composite membrane can be improved, but the reverse osmosis layer in the invention has the same straight-face water flow, and the durability of the antibacterial performance of the reverse osmosis composite membrane is not strong under the direct scouring action of the water flow.
In view of the above, the present invention develops a method for preparing a multilayer reverse osmosis composite membrane, which is used to solve the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that antibacterial substances coated on the surface of a reverse osmosis membrane are easy to fall off, and a photosensitive catalyst cannot play a role due to the fact that a light absorption surface of the photosensitive catalyst is narrow and the reverse osmosis membrane works in a weak light environment for a long time in the prior art, the invention provides the preparation method of the multilayer reverse osmosis composite membrane.
The technical scheme adopted by the invention for solving the technical problems is as follows: the multilayer reverse osmosis composite membrane comprises a base layer, a supporting layer, a separating layer and a protective layer; the multilayer reverse osmosis composite membrane is composed of the following raw materials:
15-18% of non-woven fabric, 2-4% of biphenyl trimethyl chloride, 4-5% of m-phenylenediamine, 0.5-0.8% of dimethyl sulfoxide, 0.8-1% of surfactant, 25-30% of organic solvent, 0.4-0.8% of nano molecular sieve, 0.5-1% of carbon nano tube and 40-65% of deionized water;
the surfactant is one or more of sodium lauryl sulfate, sodium dodecyl benzene sulfonate, sodium hepatocholate, benzalkonium chloride and benzalkonium bromide;
the organic solvent is one or more of N, N-dimethylacetamide, N-methylpyrrolidone, N-dimethylformamide, pyridine and tetrahydrofuran;
the method is characterized in that biphenyl trimethyl acyl chloride and m-phenylenediamine are selected to react in raw materials to generate the polyamide reverse osmosis membrane, and the nano molecular sieve and the carbon nano tube are added into the raw materials, so that the prepared reverse osmosis membrane has a strong antibacterial effect in a long-term working process by utilizing the excellent antibacterial effect of the carbon nano tube and the nano molecular sieve and the diffusivity of a nano material in a solution, and the reverse osmosis membrane can be effectively prevented from being blocked, and further the water flux of the reverse osmosis membrane is reduced in a long-term use process.
Preferably, the raw materials also comprise a photocatalyst additive; the photocatalyst material is a powdery additive prepared by mixing rutile type nano titanium dioxide, nano zirconium dioxide and nano zinc oxide according to the ratio of 2:1: 0.8; the photocatalyst additive is added into the raw materials, water molecules are decomposed by light absorption of the photocatalyst additive, hydroxide ions, superoxide anion free radicals and active oxygen are generated, and then the strong oxidation performance of the hydroxide ions, the superoxide anion free radicals and the active oxygen is utilized, so that the reverse osmosis filtration is effectively carried out, and the sterilization and decomposition are carried out on bacteria, harmful substances and fungi in water, thereby effectively enhancing the filtration, deodorization, antibacterial and purification effects of the reverse osmosis composite membrane, and further enabling the prepared reverse osmosis composite membrane to have strong practical performance.
Preferably, the photocatalyst material is a chelate photocatalyst material doped with a nano noble metal element and modified by a chemical coordination bond chelate functional element doping technology; the nano noble metal element is one or more of platinum, rhodium and palladium; the photocatalyst material is chelated and hybridized by using the nano noble metal in the raw materials, so that the separation efficiency of a photon-generated carrier is greatly improved, and the recombination of electrons and holes is inhibited, thereby further widening the light wave absorption range of the photocatalyst, effectively converting the property of the photocatalyst that only absorbs ultraviolet rays into the property of absorbing most visible light and part far infrared light, further effectively reducing the use limitation of the photocatalyst material, and further effectively enhancing the property of the reverse osmosis composite membrane.
Preferably, the non-woven fabric in the raw materials is a far infrared non-woven fabric prepared by mixing polyester fibers and far infrared ceramic fibers; the surface of the non-woven fabric is coated and solidified with a polysulfone resin coating; through using polyester fiber and far infrared ceramic fiber to mix preparation non-woven fabrics in the raw materials, and then make non-woven fabrics itself absorb and give off the performance of far infrared light and promote effectively, cooperate the photocatalyst material that adds in the raw materials, can play the synergism effectively, and then optimize the purification performance of reverse osmosis composite membrane comprehensively effectively.
A method for preparing a multilayer reverse osmosis composite membrane, comprising the steps of:
s1: spraying and washing a multilayer fiber net consisting of polyester fibers and far-red ceramic fibers by a spunlace machine to obtain a modified non-woven fabric with fibers entangled with each other, cutting the modified non-woven fabric to obtain a base layer, coating and curing a polysulfone resin coating added with a photocatalyst material on the surface of the base layer, and drying to obtain the supporting layer with a porous structure; the non-woven fabric is prepared in a spunlace mode, so that on one hand, the influence of durability and aging of the adhesive can be avoided, and meanwhile, the supporting layer is coated on the base layer, so that the combination of multiple layers in the reverse osmosis composite membrane is tighter during preparation, and the thickness of the finally prepared multilayer reverse osmosis composite membrane is effectively reduced;
s2: immersing the substrate with the porous support layer in an aqueous solution prepared by mixing m-phenylenediamine, surfactant, dimethyl sulfoxide and nano molecular sieve, soaking for 13-14min, and draining to remove excessive water; the nano molecular sieve is dispersed in the aqueous phase solution and gradually immersed in the non-woven fabric material in the soaking process, so that the nano molecular sieve is effectively dispersed more uniformly;
s3: soaking the drained base layer in S2 in an organic phase solution prepared by mixing biphenyl trimethyl acyl chloride, carbon nano tubes and an organic solvent, standing and soaking for 50-70S, immediately draining off excessive water after soaking, and dehydrating and drying to obtain a separation layer; through chemical combination between the amine-containing solution in the water phase and the acyl chloride solution, a polyamide reverse osmosis membrane is generated, and the carbon nano tubes are dispersed in the organic phase solution, so that the carbon nano tubes and the nano molecular sieve are mixed in the process of polymerization reaction, and a synergistic effect is achieved, and meanwhile, the carbon nano tubes are directly dispersed in the membrane, and the separation caused by water flow scouring in the long-term working process can be effectively avoided;
s4: coating a polysulfone resin coating layer added with photocatalyst materials on the surface of the dried separation layer again through a coating roller, obtaining a protective layer after curing, namely preparing a multilayer reverse osmosis composite membrane, and cutting, bonding and combining the multilayer reverse osmosis composite membrane with a shell to obtain a reverse osmosis assembly; the outermost polysulfone resin coating can effectively protect the reverse osmosis membrane, so that the purification effect is prevented from being weakened due to partial damage of the reverse osmosis membrane, meanwhile, the protective layer can also play a role in pre-filtering, the pressure of the reverse osmosis membrane is further reduced, and meanwhile, the protective layer can also effectively slow down the scouring effect of water flow on an inner separation layer, so that the components of an internal additive are prevented from falling off;
the reverse osmosis component in S4 comprises a shell, a water inlet pipe and a water outlet pipe; the shell is designed in an I shape; a pressurizing cavity is formed in the shell; one end of the shell is provided with a first groove; a second groove is formed in one end, far away from the first groove, of the shell; the first groove and the second groove are both in T-shaped design; the side walls of the first groove and the second groove are both in threaded design; the water inlet pipe is connected with the shell through the first groove; the water outlet pipe is connected with the shell through a second groove; one side of the first groove, which is far away from the water inlet pipe, is provided with first through holes which are uniformly distributed; the first through hole extends into the pressurization cavity; the first through holes are all designed in an inclined mode; a rotating shaft is rotatably connected in the pressurizing cavity; the surface of the rotating shaft is fixedly connected with uniformly distributed pressurizing plates; the inner wall of the pressurizing cavity is fixedly connected with elastic plates which are uniformly distributed; the elastic plate is made of elastic material; the elastic plate and the pressurizing plate are distributed at intervals; the rotating shaft is made of transparent materials and is internally provided with an installation cavity; an ultraviolet lamp is arranged in the mounting cavity; a second through hole is formed in one side, close to the second groove, of the pressurization cavity; the second through hole is communicated with the water outlet pipe; a first sliding chute is formed in one end, far away from the water inlet pipe, of the outer side of the shell; a filter ring is connected in the first sliding chute in a sliding manner; the filter ring is designed in a T shape; the surface of the filter ring is provided with second sliding chutes which are uniformly distributed; the second sliding chute is in a cross-shaped design; the second sliding chute is internally and slidably connected with a plugboard; one side of the insertion plate, which is far away from the filter ring, is fixedly connected with a permeation bag; the permeation bag is formed by bonding a plurality of layers of reverse osmosis membranes; the insertion plate is provided with a conduction groove; the surface of one side of the shell, which is close to the filter ring, is provided with uniform openings; the permeation bag is wound around the shell in an initial state, and two ends of the outer side of the permeation bag are fixedly connected through epoxy resin;
because the reverse osmosis membrane assembly is mostly operated in the environment below the liquid level for a long time, light is weaker when being transmitted to the water, so that the photocatalyst in the multilayer reverse osmosis composite membrane cannot fully exert the effect, the purification and sterilization effects are weakened, meanwhile, because the impurity content in the water is more, more impurity layers are easily adhered to the interior of the assembly in the long-term operation process, on one hand, the long-term bacterial growth of impurity accumulation is caused, the service life of the multilayer reverse osmosis composite membrane is shortened, meanwhile, the accumulated impurities are also easy to cause the blockage of a water permeable channel, so that the water flux is reduced, in the operation process, the multilayer reverse osmosis composite membrane is prepared into a permeation bag and is fixedly connected with a plug board, and is arranged on a filter ring along with the plug board, when the water flow is purified, the water flow is sent into a water inlet pipe through a water inlet pipe and enters a first groove through the water inlet pipe, the water flow in the first groove continuously enters, the water flow is jetted into the pressurizing cavity through the first through hole, because the first through hole is obliquely arranged, the water flow jetted at high speed impacts on the pressurizing plate, the pressurizing plate and the rotating shaft further rotate in the pressurizing cavity, and in the rotating process of the pressurizing plate and the rotating shaft, the space between the pressurizing plate and the elastic plate is reduced due to the interval distribution between the pressurizing plate and the elastic plate, the water pressure is increased, the water flow is further pressed to enter the permeation bag through the upper opening of the shell, pure water in the permeation bag is discharged outwards through the permeation bag, brine and impurities cannot be discharged outwards, the brine and the impurities are continuously rotated along with the pressurizing plate, and when the water flow is finally communicated with the second through hole, the water flow is discharged through a water outlet pipe connected with the second through hole, the pressurizing plate, the rotating shaft and the ultraviolet lamps arranged in the rotating shaft are used for rotating the pressurizing plate by utilizing the impact effect of the flowing water flow, and endowing pressure to the water flow in the rotating process, accelerate rivers infiltration efficiency, utilize the rotation of axis of rotation simultaneously, make the ultraviolet ray of ultraviolet lamp scattering can be even outdiffusion, promote the purifying effect of photocatalyst material to infiltration bag itself in the infiltration bag effectively, avoid the infiltration bag to receive the illumination inequality, lead to local purifying effect imperfect.
Preferably, one end of the shell, which is close to the water outlet pipe, is provided with a first cavity; the second through hole extends into the first cavity; third through holes are uniformly distributed in the side wall of the first cavity; the third through holes are all designed in an inclined mode; the third through hole extends into the first sliding chute; the surface of one side, close to the third through hole, of one end, positioned in the first sliding groove, of the filter ring is provided with impact grooves which are uniformly distributed; the impact groove is vertically designed with the third through hole; the bottom of the first sliding chute is communicated with the second groove; when the filter ring works, water flows into the filter ring through the uniform opening on the shell in the long-term working process, the position of the opening of the shell is unchanged, when the water flows out through a single position for a long time, the permeation bag corresponding to the position of the water flow works in a high load for a long time, and partial permeation bags are easy to be greatly pressed, so that the permeation bags are damaged, the water flows into the first cavity through the second through hole by arranging the first cavity, the third through hole and the impact groove, the water pressure in the first cavity is gradually increased, the water flows are outwards sprayed through the third through hole under the action of the pressure, the sprayed water flows form an impact effect on the impact groove by arranging the third through hole and the impact groove vertically, so as to drive the filter ring to rotate, and the water flow opening at the fixed position and the permeation bags on the filter ring rotate and impact with each other due to the fixed position of the shell in the rotating process of the filter ring, thereby with the impact effect dispersion of rivers to the infiltration bag on the whole filter ring, share pressure through the rotation of filtering the ring effectively, filter simultaneously between ring and the axis of rotation difference of rotation efficiency and can also make the contact between infiltration bag and the ultraviolet ray more even effectively, the stability of effectual reinforcing reverse osmosis subassembly.
Preferably, the side wall of the first sliding chute is provided with an annular groove; the filter ring is provided with rotating grooves which are uniformly distributed corresponding to the annular grooves; the rotating groove is rotatably connected with a ball; the filter ring is in rolling connection with the annular groove through a ball; the during operation strikes the groove and receives the impact of the rivers of third through-hole injection, leads to filtering the ring and possesses certain motion trend, through having seted up the rotation groove at the filter ring lateral wall, makes to filter and pass through ball roll connection between ring and the first spout, can effectively must reduce the frictional force between filter ring and the second spout, and then makes the reinforcing of filter ring rotation efficiency, and the stability of rotation strengthens.
Preferably, the inside of the permeation bag is fixedly connected with a light guide pipe; the light guide pipe extends into the opening on the surface of the shell; the light guide pipe is made of a flexible optical fiber material added with a light diffusing agent; the during operation, because the infiltration bag rolling is on filtering the ring, the unable homodisperse of ultraviolet illumination is in whole infiltration bag, through linking firmly the light pipe in infiltration bag inside, utilizes the light pipe to transmit the ultraviolet ray in the pressure boost intracavity to infiltration bag inside, and then makes the diffusion range increase of ultraviolet ray effectively, and then makes the whole purifying effect reinforcing of infiltration bag.
The invention has the following beneficial effects:
1. according to the preparation method of the multilayer reverse osmosis composite membrane, the pressurizing plate, the rotating shaft and the ultraviolet lamp arranged in the rotating shaft are arranged, the pressurizing plate is rotated by utilizing the impact effect of water flow, pressure is applied to the water flow in the rotating process, the water flow permeation efficiency is accelerated, meanwhile, the ultraviolet rays scattered by the ultraviolet lamp can be uniformly diffused outwards by utilizing the rotation of the rotating shaft, the purification effect of the photocatalyst material in the permeation bag on the permeation bag is effectively improved, and the incomplete local purification effect caused by the fact that the permeation bag is not uniformly illuminated is avoided.
2. According to the preparation method of the multilayer reverse osmosis composite membrane, the first cavity, the third through hole and the impact groove are arranged, the filter ring is driven to rotate through the impact of water flow, the position of the shell is fixed in the rotating process of the filter ring, and the water flow opening at the fixed position and the permeation bag on the filter ring are subjected to rotational impact, so that the impact effect of the water flow is dispersed to the permeation bag on the whole filter ring, the pressure is effectively shared through the rotation of the filter ring, meanwhile, the contact between the permeation bag and ultraviolet light can be more uniform due to the difference of the rotation efficiency between the filter ring and the rotating shaft, and the stability of a reverse osmosis assembly is effectively enhanced.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a front view of a reverse osmosis module;
FIG. 3 is a cross-sectional view of a reverse osmosis module;
FIG. 4 is a cross-sectional view of a reverse osmosis module;
FIG. 5 is a disassembled view of the reverse osmosis module;
FIG. 6 is a cross-sectional view taken at A-A of FIG. 3;
in the figure: the device comprises a shell 1, a water inlet pipe 11, a water outlet pipe 12, a rotating shaft 2, a pressurizing plate 21, an elastic plate 22, an ultraviolet lamp 23, a filter ring 3, a plug plate 31, a permeation bag 32, a third through hole 33, an impact groove 34, a ball 35 and a light guide pipe 36.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 6, a multi-layered reverse osmosis composite membrane according to the present invention includes a base layer, a support layer, a separation layer, and a protective layer; the multilayer reverse osmosis composite membrane is composed of the following raw materials:
15-18% of non-woven fabric, 2-4% of biphenyl trimethyl chloride, 4-5% of m-phenylenediamine, 0.5-0.8% of dimethyl sulfoxide, 0.8-1% of surfactant, 25-30% of organic solvent, 0.4-0.8% of nano molecular sieve, 0.5-1% of carbon nano tube and 40-65% of deionized water;
the surfactant is one or more of sodium lauryl sulfate, sodium dodecyl benzene sulfonate, sodium hepatocholate, benzalkonium chloride and benzalkonium bromide;
the organic solvent is one or more of N, N-dimethylacetamide, N-methylpyrrolidone, N-dimethylformamide, pyridine and tetrahydrofuran;
the method is characterized in that biphenyl trimethyl acyl chloride and m-phenylenediamine are selected to react in raw materials to generate the polyamide reverse osmosis membrane, and the nano molecular sieve and the carbon nano tube are added into the raw materials, so that the prepared reverse osmosis membrane has a strong antibacterial effect in a long-term working process by utilizing the excellent antibacterial effect of the carbon nano tube and the nano molecular sieve and the diffusivity of a nano material in a solution, and the reverse osmosis membrane can be effectively prevented from being blocked, and further the water flux of the reverse osmosis membrane is reduced in a long-term use process.
As an embodiment of the invention, the raw material further comprises a photocatalyst additive; the photocatalyst material is a powdery additive prepared by mixing rutile type nano titanium dioxide, nano zirconium dioxide and nano zinc oxide according to the ratio of 2:1: 0.8; the photocatalyst additive is added into the raw materials, water molecules are decomposed by light absorption of the photocatalyst additive, hydroxide ions, superoxide anion free radicals and active oxygen are generated, and then the strong oxidation performance of the hydroxide ions, the superoxide anion free radicals and the active oxygen is utilized, so that the reverse osmosis filtration is effectively carried out, and the sterilization and decomposition are carried out on bacteria, harmful substances and fungi in water, thereby effectively enhancing the filtration, deodorization, antibacterial and purification effects of the reverse osmosis composite membrane, and further enabling the prepared reverse osmosis composite membrane to have strong practical performance.
In one embodiment of the present invention, the photocatalyst material is a chelate photocatalyst material doped with a nano noble metal element modified by a chemical coordinate bond chelate functional element doping technique; the nano noble metal element is one or more of platinum, rhodium and palladium; the photocatalyst material is chelated and hybridized by using the nano noble metal in the raw materials, so that the separation efficiency of a photon-generated carrier is greatly improved, and the recombination of electrons and holes is inhibited, thereby further widening the light wave absorption range of the photocatalyst, effectively converting the property of the photocatalyst that only absorbs ultraviolet rays into the property of absorbing most visible light and part far infrared light, further effectively reducing the use limitation of the photocatalyst material, and further effectively enhancing the property of the reverse osmosis composite membrane.
As an embodiment of the present invention, the non-woven fabric in the raw material is a far infrared non-woven fabric made by mixing polyester fiber and far infrared ceramic fiber; the surface of the non-woven fabric is coated and solidified with a polysulfone resin coating; through using polyester fiber and far infrared ceramic fiber to mix preparation non-woven fabrics in the raw materials, and then make non-woven fabrics itself absorb and give off the performance of far infrared light and promote effectively, cooperate the photocatalyst material that adds in the raw materials, can play the synergism effectively, and then optimize the purification performance of reverse osmosis composite membrane comprehensively effectively.
A method for preparing a multilayer reverse osmosis composite membrane, comprising the steps of:
s1: spraying and washing a multilayer fiber net consisting of polyester fibers and far-red ceramic fibers by a spunlace machine to obtain a modified non-woven fabric with fibers entangled with each other, cutting the modified non-woven fabric to obtain a base layer, coating and curing a polysulfone resin coating added with a photocatalyst material on the surface of the base layer, and drying to obtain the supporting layer with a porous structure; the non-woven fabric is prepared in a spunlace mode, so that on one hand, the influence of durability and aging of the adhesive can be avoided, and meanwhile, the supporting layer is coated on the base layer, so that the combination of multiple layers in the reverse osmosis composite membrane is tighter during preparation, and the thickness of the finally prepared multilayer reverse osmosis composite membrane is effectively reduced;
s2: immersing the substrate with the porous support layer in an aqueous solution prepared by mixing m-phenylenediamine, surfactant, dimethyl sulfoxide and nano molecular sieve, soaking for 13-14min, and draining to remove excessive water; the nano molecular sieve is dispersed in the aqueous phase solution and gradually immersed in the non-woven fabric material in the soaking process, so that the nano molecular sieve is effectively dispersed more uniformly;
s3: soaking the drained base layer in S2 in an organic phase solution prepared by mixing biphenyl trimethyl acyl chloride, carbon nano tubes and an organic solvent, standing and soaking for 50-70S, immediately draining off excessive water after soaking, and dehydrating and drying to obtain a separation layer; through chemical combination between the amine-containing solution in the water phase and the acyl chloride solution, a polyamide reverse osmosis membrane is generated, and the carbon nano tubes are dispersed in the organic phase solution, so that the carbon nano tubes and the nano molecular sieve are mixed in the process of polymerization reaction, and a synergistic effect is achieved, and meanwhile, the carbon nano tubes are directly dispersed in the membrane, and the separation caused by water flow scouring in the long-term working process can be effectively avoided;
s4: coating a polysulfone resin coating layer added with photocatalyst materials on the surface of the dried separation layer again through a coating roller, obtaining a protective layer after curing, namely preparing a multilayer reverse osmosis composite membrane, and preparing a reverse osmosis assembly after cutting, bonding and combining the multilayer reverse osmosis composite membrane with the shell 1; the outermost polysulfone resin coating can effectively protect the reverse osmosis membrane, so that the purification effect is prevented from being weakened due to partial damage of the reverse osmosis membrane, meanwhile, the protective layer can also play a role in pre-filtering, the pressure of the reverse osmosis membrane is further reduced, and meanwhile, the protective layer can also effectively slow down the scouring effect of water flow on an inner separation layer, so that the components of an internal additive are prevented from falling off;
wherein the reverse osmosis component in S4 comprises a shell 1, a water inlet pipe 11 and a water outlet pipe 12; the shell 1 is in an I-shaped design; a pressurizing cavity is formed in the shell 1; one end of the shell 1 is provided with a first groove; a second groove is formed in one end, far away from the first groove, of the shell 1; the first groove and the second groove are both in T-shaped design; the side walls of the first groove and the second groove are both in threaded design; the water inlet pipe 11 is connected with the shell 1 through a first groove; the water outlet pipe 12 is connected with the shell 1 through a second groove; one side of the first groove, which is far away from the water inlet pipe 11, is provided with first through holes which are uniformly distributed; the first through hole extends into the pressurization cavity; the first through holes are all designed in an inclined mode; a rotating shaft 2 is rotationally connected in the pressurizing cavity; the surface of the rotating shaft 2 is fixedly connected with uniformly distributed pressurizing plates 21; the inner wall of the pressurizing cavity is fixedly connected with elastic plates 22 which are uniformly distributed; the elastic plate 22 is made of elastic material; the elastic plate 22 and the pressurizing plate 21 are distributed at intervals; the rotating shaft 2 is made of transparent materials and is internally provided with an installation cavity; an ultraviolet lamp 23 is arranged in the mounting cavity; a second through hole is formed in one side, close to the second groove, of the pressurization cavity; the second through hole is communicated with the water outlet pipe 12; a first sliding chute is formed in one end, far away from the water inlet pipe 11, of the outer side of the shell 1; a filter ring 3 is connected in the first sliding chute in a sliding manner; the filter ring is in a 3T-shaped design; the surface of the filter ring 3 is provided with second sliding chutes which are uniformly distributed; the second sliding chute is in a cross-shaped design; the second sliding chute is internally and slidably connected with a plugboard 31; a penetration bag 32 is fixedly connected to one side of the insertion plate 31, which is far away from the filter ring 3; the permeation bag 32 is formed by bonding a plurality of layers of reverse osmosis membranes; the insertion plate 31 is provided with a conduction groove; the surface of one side of the shell 1, which is close to the filter ring 3, is uniformly opened; in an initial state, the permeation bag 32 is wound around the shell 1, and two ends of the outer side of the permeation bag 32 are fixedly connected through epoxy resin;
because the reverse osmosis membrane component works in the environment below the liquid level for a long time under most conditions, light is weaker when being transmitted to the water, so that the photocatalyst in the multilayer reverse osmosis composite membrane cannot fully exert the effect, the purification and sterilization effects are weakened, meanwhile, because the impurity content in the water is more, more impurity layers are easily adhered to the interior of the component in the long-term working process, on one hand, the long-term bacterial growth of impurity accumulation is caused, the service life of the multilayer reverse osmosis composite membrane is shortened, meanwhile, the accumulated impurities are also easy to cause the blockage of a water permeable channel, so that the water flux is reduced, during the working, the multilayer reverse osmosis composite membrane is prepared into a permeation bag 32 and is fixedly connected with a plug board 31, the permeation bag 32 and the plug board 31 are arranged on a filter ring 3 along with the plug board 31, during the water flow purification, the water flow is sent into a water inlet pipe 11 through a water pump and enters a first groove through the water inlet pipe 11, the water flow in the first groove continuously enters and is injected into the pressurizing cavity through the first through hole, because the first through hole is obliquely arranged, the water flow injected at high speed impacts on the pressurizing plate 21, so that the pressurizing plate 21 and the rotating shaft 2 rotate in the pressurizing cavity, and in the process of rotating the pressurizing plate 21 and the rotating shaft 2, the pressurizing plate 21 and the elastic plate 22 are distributed at intervals, so that the space between the pressurizing plate 21 and the elastic plate 22 is reduced, the water pressure is increased, so that the water flow enters the permeation bag 32 through the upper opening of the shell 1 under pressure, pure water in the permeation bag 32 is discharged outwards through the permeation bag 32, brine and impurities cannot be discharged outwards, along with the continuous rotation of the pressurizing plate 21 and when finally being communicated with the second through hole, the pure water is discharged through the water outlet pipe 12 connected with the second through hole, and through the ultraviolet lamp 23 arranged in the pressurizing plate 21, the rotating shaft 2 and the rotating shaft 2, utilize the impact effect that rivers flow to make pressure boost plate 21 rotate to give pressure to rivers at the pivoted in-process, accelerate rivers infiltration efficiency, utilize the rotation of axis of rotation 2 simultaneously, make the ultraviolet ray of ultraviolet lamp 23 scattering can even outdiffusion, promote the purifying effect of photocatalyst material to infiltration bag 32 itself in infiltration bag 32 effectively, avoid infiltration bag 32 to receive the illumination inequality, lead to local purifying effect imperfect.
As an embodiment of the present invention, a first cavity is opened at one end of the housing 1 close to the water outlet pipe 12; the second through hole extends into the first cavity; the side wall of the first cavity is provided with third through holes 33 which are uniformly distributed; the third through holes 33 are all designed in an inclined manner; the third through hole 33 extends into the first chute; the surface of one side, close to the third through hole 33, of one end, located in the first sliding groove, of the filter ring 3 is provided with impact grooves 34 which are uniformly distributed; the impact groove 34 is perpendicular to the third through hole 33; the bottom of the first sliding chute is communicated with the second groove; when the filter ring is in operation, water flows into the filter ring 3 through the uniform opening on the shell 1 in the long-term working process, because the opening position of the shell 1 is unchanged, when the water flows out through a single position for a long time, the permeation bag 32 corresponding to the water flow is easy to work with high load for a long time, and part of the permeation bag 32 is easy to be greatly pressed, so that the permeation bag is damaged, through arranging the first cavity, the third through hole 33 and the impact groove 34, the water flows into the first cavity through the second through hole, the water pressure in the first cavity is gradually increased, the water flows are outwards sprayed through the third through hole 33 under the action of the pressure, because the third through hole 33 and the impact groove 34 are vertically arranged, the sprayed water flows form an impact effect on the impact groove 34, so as to drive the filter ring 3 to rotate, because the position of the shell 1 is fixed in the rotating process of the filter ring 3, the water flow opening at the fixed position and the permeation bag 32 on the filter ring 3 are subjected to rotational impact, thereby with the impact effect dispersion of rivers to the infiltration bag 32 on the whole filter ring 3, the rotation through filter ring 3 shares pressure effectively, filters simultaneously and can also make the contact between infiltration bag 32 and the ultraviolet ray more even effectively with the difference of rotation efficiency between ring 3 and the axis of rotation 2, the stability of effectual reinforcing reverse osmosis subassembly.
As an embodiment of the present invention, an annular groove is formed in a side wall of the first sliding chute; the filter ring 3 is provided with rotating grooves which are uniformly distributed corresponding to the annular grooves; the rotating groove is rotatably connected with a ball 35; the filter ring 3 is in rolling connection with the annular groove through a ball 35; during operation, strike groove 34 and receive the impact of the rivers that third through hole 33 sprays, lead to filtering ring 3 to possess certain motion trend, through having seted up the rotation groove at filtering ring 3 lateral wall, make to filter between ring 3 and the first spout through ball 35 roll connection, can effectively must reduce the frictional force between filtering ring 3 and the second spout, and then make the 3 rotational efficiency reinforcing of filtering ring, the rotational stability reinforcing.
In one embodiment of the present invention, the permeation bag 32 has a light pipe 36 attached inside; the light pipe 36 extends into the surface opening of the shell 1; the light pipe 36 is made of a flexible optical fiber material added with a light diffusing agent; during operation, because the rolling of infiltration bag 32 is on filter ring 3, the unable homodisperse of ultraviolet illumination is in whole infiltration bag 32, through linking firmly light pipe 36 in infiltration bag 32 is inside, utilizes light pipe 36 to transmit the ultraviolet ray in the pressure boost intracavity to infiltration bag 32 inside, and then makes the diffusion range increase of ultraviolet ray effectively, and then makes the whole purifying effect reinforcing of infiltration bag 32.
The specific working process is as follows:
when the device works, the multi-layer reverse osmosis composite membrane is prepared into the permeation bag 32 and is fixedly connected with the insertion plate 31, the permeation bag is arranged on the filter ring 3 along with the insertion plate 31, when water flow purification is carried out, water flow is sent into the water inlet pipe 11 through the water pump and enters the first groove through the water inlet pipe 11, the water flow in the first groove continuously enters and is sprayed into the pressurizing cavity through the first through hole, because the first through hole is obliquely arranged, the water flow sprayed at high speed impacts on the pressurizing plate 21, the pressurizing plate 21 and the rotating shaft 2 rotate in the pressurizing cavity, the pressurizing plate 21 and the rotating shaft 2 are distributed at intervals during the rotation process, the space between the pressurizing plate 21 and the elastic plate 22 is reduced, the water pressure is increased, the water flow is pressed to enter the permeation bag 32 through the opening on the shell 1, and pure water in the permeation bag 32 is discharged outwards through the permeation bag 32, brine and impurity can't be arranged outward, along with pressure increasing plate 21 continuously rotates, and finally when conducting with the second through-hole, rivers flow in to first cavity through the second through-hole, and make the flowing water pressure of water in the first cavity crescent, rivers outwards spout through third through-hole 33 under the effect of pressure, because third through-hole 33 sets up with strikeing groove 34 is perpendicular, the rivers that spout form the impact effect to strikeing groove 34, and then drive and filter ring 3 and rotate, filter ring 3 pivoted in-process because casing 1 rigidity, rotate between the rivers opening of fixed position and the infiltration bag 32 on the filter ring 3 and strike, thereby disperse the impact effect of rivers to the infiltration bag 32 on whole filter ring 3.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A preparation method of a multilayer reverse osmosis composite membrane is characterized by comprising the following steps: the multilayer reverse osmosis composite membrane comprises a base layer, a supporting layer, a separating layer and a protective layer; the multilayer reverse osmosis composite membrane is composed of the following raw materials:
15-18% of non-woven fabric, 2-4% of biphenyl trimethyl chloride, 4-5% of m-phenylenediamine, 0.5-0.8% of dimethyl sulfoxide, 0.8-1% of surfactant, 25-30% of organic solvent, 0.4-0.8% of nano molecular sieve, 0.5-1% of carbon nano tube and 40-65% of deionized water;
the surfactant is one or more of sodium lauryl sulfate, sodium dodecyl benzene sulfonate, sodium hepatocholate, benzalkonium chloride and benzalkonium bromide;
the organic solvent is one or more of N, N-dimethylacetamide, N-methylpyrrolidone, N-dimethylformamide, pyridine and tetrahydrofuran;
wherein the raw material also comprises a photocatalyst material; the photocatalyst material is a powdery additive prepared by mixing rutile type nano titanium dioxide, nano zirconium dioxide and nano zinc oxide according to the ratio of 2:1: 0.8;
the photocatalyst material is a chelate photocatalyst material doped with nano noble metal elements and modified by a chemical coordination bond chelate functional element doping technology; the nano noble metal element is one or more of platinum, rhodium and palladium;
wherein the non-woven fabric in the raw materials is a far infrared non-woven fabric prepared by mixing polyester fibers and far infrared ceramic fibers; the surface of the non-woven fabric is coated and solidified with a polysulfone resin coating;
the preparation method of the multilayer reverse osmosis composite membrane comprises the following steps:
s1: spraying and washing a multilayer fiber net consisting of polyester fibers and far-red ceramic fibers by a spunlace machine to obtain a modified non-woven fabric with fibers entangled with each other, cutting the modified non-woven fabric to obtain a base layer, coating and curing a polysulfone resin coating added with a photocatalyst material on the surface of the base layer, and drying to obtain the supporting layer with a porous structure;
s2: immersing the substrate with the porous support layer in an aqueous solution prepared by mixing m-phenylenediamine, surfactant, dimethyl sulfoxide and nano molecular sieve, soaking for 13-14min, and draining to remove excessive water;
s3: soaking the drained base layer in S2 in an organic phase solution prepared by mixing biphenyl trimethyl acyl chloride, carbon nano tubes and an organic solvent, standing and soaking for 50-70S, immediately draining off excessive water after soaking, and dehydrating and drying to obtain a separation layer;
s4: coating a polysulfone resin coating layer added with photocatalyst materials on the surface of the dried separation layer again through a coating roller, obtaining a protective layer after curing, namely preparing a multilayer reverse osmosis composite membrane, and preparing a reverse osmosis assembly after cutting, bonding and combining the multilayer reverse osmosis composite membrane with the shell (1);
wherein the reverse osmosis component in S4 comprises a shell (1), a water inlet pipe (11) and a water outlet pipe (12); the shell (1) is designed in an I shape; a pressurizing cavity is formed in the shell (1); one end of the shell (1) is provided with a first groove; a second groove is formed in one end, far away from the first groove, of the shell (1); the first groove and the second groove are both in T-shaped design; the side walls of the first groove and the second groove are both in threaded design; the water inlet pipe (11) is connected with the shell (1) through the first groove; the water outlet pipe (12) is connected with the shell (1) through a second groove; one side of the first groove, which is far away from the water inlet pipe (11), is provided with first through holes which are uniformly distributed; the first through hole extends into the pressurization cavity; the first through holes are all designed in an inclined mode; a rotating shaft (2) is rotationally connected in the pressurizing cavity; the surface of the rotating shaft (2) is fixedly connected with uniformly distributed pressurizing plates (21); the inner wall of the pressurizing cavity is fixedly connected with elastic plates (22) which are uniformly distributed; the elastic plate (22) is made of elastic material; the elastic plate (22) and the pressurizing plate (21) are distributed at intervals; the rotating shaft (2) is made of transparent materials and is internally provided with an installation cavity; an ultraviolet lamp (23) is arranged in the mounting cavity; a second through hole is formed in one side, close to the second groove, of the pressurization cavity; the second through hole is communicated with the water outlet pipe (12); a first sliding groove is formed in one end, far away from the water inlet pipe (11), of the outer side of the shell (1); a filter ring (3) is connected in the first sliding chute in a sliding way; the filter ring (3) is designed in a T shape; the surface of the filter ring (3) is provided with second sliding chutes which are uniformly distributed; the second sliding chute is in a cross-shaped design; the second sliding chute is internally and slidably connected with a plugboard (31); a penetration bag (32) is fixedly connected to one side of the insertion plate (31) far away from the filter ring (3); the permeation bag (32) is formed by bonding a plurality of layers of reverse osmosis membranes; the insertion plate (31) is provided with a conduction groove; the surface of one side of the shell (1) close to the filter ring (3) is uniformly provided with openings; in the initial state, the permeation bag (32) is wound around the shell (1), and two ends of the outer side of the permeation bag (32) are fixedly connected through epoxy resin.
2. A method of preparing a multilayer reverse osmosis composite membrane according to claim 1, wherein: one end of the shell (1) close to the water outlet pipe (12) is provided with a first cavity; the second through hole extends into the first cavity; third through holes (33) are uniformly distributed in the side wall of the first cavity; the third through holes (33) are all designed in an inclined mode; the third through hole (33) extends into the first sliding chute; the surface of one side, close to the third through hole (33), of one end, located in the first sliding groove, of the filter ring (3) is provided with impact grooves (34) which are uniformly distributed; the impact groove (34) is perpendicular to the third through hole (33); and the bottom of the first sliding chute is communicated with the second groove.
3. A method of preparing a multilayer reverse osmosis composite membrane according to claim 1, wherein: an annular groove is formed in the side wall of the first sliding groove; the filter ring (3) is provided with rotating grooves which are uniformly distributed corresponding to the annular grooves; the rotating groove is rotationally connected with a ball (35); the filter ring (3) is connected with the annular groove in a rolling way through a ball (35).
4. A method of preparing a multilayer reverse osmosis composite membrane according to claim 1, wherein: a light guide pipe (36) is fixedly connected inside the permeation bag (32); the light guide pipe (36) extends into the surface opening of the shell (1); the light pipe (36) is made of a flexible optical fiber material added with a light diffusion agent.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN101705613A (en) * | 2009-11-03 | 2010-05-12 | 东华大学 | Method for preparing flexible air purifying material by low temperature in situ synthesis |
| CN103182252A (en) * | 2011-12-28 | 2013-07-03 | 中国科学院宁波材料技术与工程研究所 | Novel composite forward osmosis membrane and preparation method thereof |
| CN110665377A (en) * | 2019-10-15 | 2020-01-10 | 恩泰环保科技（常州）有限公司 | High-flux anti-pollution reverse osmosis membrane and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM309614U (en) * | 2006-09-19 | 2007-04-11 | Nan Kai Inst Technology | Solar power generator |
| CN101705613A (en) * | 2009-11-03 | 2010-05-12 | 东华大学 | Method for preparing flexible air purifying material by low temperature in situ synthesis |
| CN103182252A (en) * | 2011-12-28 | 2013-07-03 | 中国科学院宁波材料技术与工程研究所 | Novel composite forward osmosis membrane and preparation method thereof |
| CN110665377A (en) * | 2019-10-15 | 2020-01-10 | 恩泰环保科技（常州）有限公司 | High-flux anti-pollution reverse osmosis membrane and preparation method thereof |
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