CN115155323A - Reverse osmosis and forward osmosis membrane repairing agent and preparation method thereof - Google Patents
Reverse osmosis and forward osmosis membrane repairing agent and preparation method thereof Download PDFInfo
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- CN115155323A CN115155323A CN202210860971.8A CN202210860971A CN115155323A CN 115155323 A CN115155323 A CN 115155323A CN 202210860971 A CN202210860971 A CN 202210860971A CN 115155323 A CN115155323 A CN 115155323A
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 42
- 238000009292 forward osmosis Methods 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 37
- 230000008439 repair process Effects 0.000 claims abstract description 13
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229940044120 2-n-octyl-4-isothiazolin-3-one Drugs 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
- B01D65/106—Repairing membrane apparatus or modules
- B01D65/108—Repairing membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/06—Membrane cleaning or sterilisation ; Membrane regeneration with special washing compositions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/445—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a reverse osmosis and forward osmosis membrane repairing agent and a preparation method thereof, wherein the reverse osmosis and forward osmosis membrane repairing agent comprises the following components: 20-40 parts of membrane pretreatment component, 50-80 parts of membrane repair component, 5-10 parts of acidity regulator and 80-200 parts of water. Adding the membrane repairing component and the membrane pretreatment component into water according to the mass part in a reactor with stirring, and uniformly stirring; under normal pressure, the temperature is controlled to be 60-90 ℃, and the stirring speed is controlled to be 60r/min; stirring for 2-4h under normal pressure while controlling the temperature and stirring speed, analyzing pH value during stirring, and adjusting pH value to 2.5-5.0 with citric acid. The invention can greatly improve the desalination rate of the membrane, has good restoration effect and saves restoration agents, the restored membrane can run for a long time under the working condition that the desalination rate is greatly improved, and can ensure that the restoration effect of the desalination rate and water flux after the membrane is restored is that the desalination rate is improved by more than or equal to 50 percent, the water yield is reduced by less than or equal to 10 percent, and the retention time is maintained by more than or equal to 6 months.
Description
Technical Field
The invention relates to a reverse osmosis and forward osmosis membrane repairing agent and a preparation method thereof.
Technical Field
In the desalination of seawater brackish water, the production of water for electronic industry, the production of medicines and medical water, a reverse osmosis membrane and a forward osmosis filter device are needed to carry out desalination treatment on raw water in order to obtain a large amount of relatively pure industrial desalted water, municipal wastewater, industrial wastewater, food processing and other aspects. Reverse osmosis membranes and forward osmosis membranes are increasingly used in a variety of applications, with the use of more and more membranes. The reverse osmosis membrane and forward osmosis membrane filtration devices used in the process can naturally age along with the increase of treatment capacity and the prolonging of service time; the presence of oxidizing species in the water can also cause the performance of the membrane filtration device to degrade in an off-line manner; periodic acid-base chemical cleaning due to membrane fouling and bacterial growth also causes gradual degradation of the performance of the membrane filtration device. When the salt rejection rate, which is the most core index of the reverse osmosis and forward osmosis filtration devices, is reduced to a certain degree (for example, the initial salt rejection rate is about 98 percent, and is reduced to less than or equal to 95 percent or even lower), the content of water ions produced by the filtration devices is too high to meet the water quality requirement of industrial water, and at the moment, the reverse osmosis and forward osmosis filtration elements of the batch are all scrapped, and new filtration elements are required to be replaced.
After the reverse osmosis membrane and the forward osmosis membrane operate for a period of time, substances such as colloid, metal oxide, bacteria, organic matters, scale and the like can be accumulated on the concentrated water side of the membrane, so that the problems of reduction of the desalination rate of the system, reduction of the water yield, increase of the pressure difference and the like are caused, and membrane pollution is formed. The membrane pollution is a complex process, the characteristics of the membrane pollution are closely related to the interaction of physical factors, chemical factors and microbial factors among the pollutants in water, the physical factors, the chemical factors and the microbial factors are correlated and do not exist singly, and when the microbial pollution trend is formed, the formation of the other two kinds of pollution is accelerated, so that the membrane pollution is aggravated. Therefore, the membrane is blocked, the filtration efficiency and the water yield of the membrane are reduced, the cleaning frequency of the membrane is improved, the service life of the membrane is shortened, the membrane replacement frequency is increased, and the problems of decline and aging of the membrane, reduction of the desalination rate of a system, increase of water yield, reduction of pressure difference and the like are caused due to repeated cleaning of the membrane, so that the use cost and the operation cost of the membrane component are greatly increased.
The reverse osmosis membrane and the forward osmosis membrane are oxidized in an aqueous solution, and the morphological structure of the membrane is destroyed. The oxidation resistance of the membrane depends both on the nature of the solution being separated and on the chemical structure of the membrane material. Hydrolysis and oxidation of the membrane occur simultaneously, and the hydrolysis of the membrane is closely related to the chemical structure of the polymeric material constituting the membrane. When high scoreChemical groups which are easy to hydrolyze are arranged in the subchain, such as-CONH-, -COOR-, -CN, -CH 2 O-, these groups are hydrolyzed by an acid or a base to deteriorate the film properties. As the number of times of cleaning the membrane is increased, the water yield and salt rejection rate of the membrane are greatly changed, and the expected target of production requirements cannot be met.
Therefore, the water yield of the polluted reverse osmosis membrane and the polluted forward osmosis membrane after being washed by the acidic cleaning agent and the alkaline cleaning agent for many times is greatly increased, the salt rejection rate is greatly reduced, and the polluted reverse osmosis membrane and the polluted forward osmosis membrane are irreversibly damaged. In order to prolong the service life of the membrane and reduce the use and operation cost of the membrane component, the repair of reverse osmosis membranes and forward osmosis membranes is a problem which is urgently needed to be solved by the pure water industry for daily life and industrial production. The membrane repairing agent at the present stage is mainly suitable for off-line high-temperature repairing. The offline high-temperature repairing workers have high labor intensity, time and labor are consumed for disassembling and assembling the membrane, the effect is not good, the cost is high, and the operability is not large. Therefore, the selection of a proper reverse osmosis membrane and forward osmosis membrane repairing method and medicament has great significance for repairing the pure water industry for life and industrial production. A large amount of films are scrapped, so that the production cost is greatly increased, and the solid waste treatment becomes the current problem.
Disclosure of Invention
The invention aims to solve the problems of great reduction of desalination rate and increase of water yield after pollution cleaning of a desalination water film for domestic and industrial production, and provides a reverse osmosis and forward osmosis membrane repairing agent for on-line shutdown of a reverse osmosis membrane and a forward osmosis membrane at normal temperature and a preparation method thereof.
The repairing agent comprises the following components:
membrane pretreatment components: 20-40 parts;
membrane repair components: 50-80 parts;
acid regulator: 5-10 parts;
water: 80-200 parts of a binder;
the membrane pretreatment component comprises isothiazolinone and derivatives thereof, sodium bisulfite or oxalic acid, dodecyl benzene sulfonate and one or a mixture of more of dodecyl sulfate; the membrane repairing component comprises one or a mixture of more of ammonium chloride, acyl chloride, amine and aldehyde; the acidity regulator comprises citric acid.
Further, the membrane pretreatment component comprises one or a mixture of more of isothiazolinone, oxalic acid and sodium dodecyl sulfate; the membrane repairing component comprises one or a mixture of more of ammonium chloride, terephthaloyl chloride, o-phenylenediamine and urea formaldehyde.
The pH value range of the reverse osmosis membrane and forward osmosis membrane repairing agent is 1.0-6.0, and the preferred pH value range is 2.5-5.0.
The preparation method comprises the following steps:
(1) Adding the membrane repairing component and the membrane pretreatment component into water according to the mass part in a reactor with a stirrer, and uniformly stirring;
(2) Under normal pressure, the temperature is controlled to be 60-90 ℃, and the stirring speed is controlled to be 60r/min;
(3) Stirring for 2-4h under normal pressure while controlling the temperature and stirring speed, analyzing pH value during stirring, and adjusting pH value to 2.5-5.0 with citric acid.
The using method of the invention comprises the following steps:
(1) Thoroughly cleaning the membrane system, and washing the membrane system to be neutral by reverse osmosis water;
(2) Preparing a membrane repairing agent according to the method of claim 6, adjusting the pH value to 2.0-4.0 by using citric acid, feeding into a membrane system, controlling the temperature to be 35-60 ℃, controlling the pressure of concentrated water to be 2bar, circulating for 4-6 hours, and soaking for not less than 8 hours;
(3) And (4) thoroughly flushing the membrane system to be neutral, and testing the salt rejection rate and the water production performance of the system by starting.
The sodium citrate has good water solubility and Ca in water 2+ 、Mg 2+ The metal ions have the characteristics of excellent chelating capacity, biodegradability, strong dispersing capacity and anti-redeposition capacity and the like.
Isothiazolinone is a broad-spectrum, high-efficiency, low-toxicity, non-oxidizing bactericide, and the common isothiazolinone bactericides include: 5-chloro-2-methyl-4-isothiazolin-3-one, 1, 2-benzisothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one. The isothiazolinone germicide is one kind of heterocyclic structure and has the germicidal principle of destroying DNA molecule inside bacterial cell with the active part in the heterocyclic structure to make the bacteria inactive. After the isothiazolinone contacts with the microorganism, the isothiazolinone has a biocidal effect by breaking the bonds of proteins of the bacteria and the algae, can quickly and irreversibly inhibit the growth of the microorganism, so that the microorganism cells die, and has strong inhibiting and killing effects on common bacteria, fungi, algae and the like.
Oxalic acid, also known as oxalic acid, is widely found in plant-derived foods. Oxalic acid is colorless columnar crystal, is easily soluble in water but not soluble in organic solvents such as diethyl ether and the like, has strong coordination effect, and is another metal chelating agent in plant-derived food. When oxalic acid is combined with some alkaline earth elements, its solubility is greatly reduced. Oxalic acid can form water soluble complexes with many metals. Oxalic acid is 10000 times stronger than acetic acid (acetic acid), and is a strong acid in organic acid, and can react with carbonate to release carbon dioxide. Oxalate has strong reducibility and is easy to be oxidized into carbon dioxide and water by the action of an oxidant. Oxalic acid is toxic. Has irritation and corrosion effects on skin and mucosa, and is easily absorbed through epidermis and mucosa to cause poisoning. The maximum allowable concentration in air is 1m g/m3. Oxalic acid can be reacted with an alcohol to form an ester. For example, oxalic acid reacts with ethanol to produce diethyl oxalate.
Sodium lauryl sulfate is neutral and belongs to anionic surfactants. Is easy to dissolve in water, has good compatibility with anions and non-ions, and has good emulsifying, foaming, penetrating, decontaminating and dispersing performances. The sodium dodecyl sulfate has obvious decontamination effect on particle dirt, protein dirt and oily dirt, has excellent washing effect on the particle dirt on natural fiber, has the detergency enhanced along with the increase of washing temperature, and has higher effect on the protein dirt than that of a nonionic surfactant. However, sodium lauryl sulfate has disadvantages: poor stability, and prohibited combination with strong oxides. The sodium dodecyl sulfate as an anionic surfactant has good surface activity and strong hydrophilicity, and effectively reduces the tension of an oil-water interface to achieve the emulsification effect. The sodium dodecyl sulfate is an anionic surfactant, can make the surfaces of fabrics, plastics and the like have affinity for water, and the ionic surfactant also has a conductive function, so that static electricity can be leaked in time, and the danger and inconvenience caused by the static electricity are reduced.
The colorless crystals or white granular powder of ammonium chloride has no odor of ammonium chloride. Salty, cool and slightly bitter. The hygroscopicity is low. The powdery ammonium chloride is extremely easy to deliquesce, the moisture absorption point is about 76 percent generally, and when the relative humidity in air is higher than the moisture absorption point, the ammonium chloride generates the moisture absorption phenomenon and is easy to agglomerate. Capable of sublimation (actually the decomposition and regeneration process of ammonium chloride) without melting point. Is easily soluble in water, slightly soluble in ethanol, soluble in liquid ammonia, and insoluble in acetone and diethyl ether. Hydrochloric acid and sodium chloride can reduce their solubility in water. Ammonium chloride is a strong electrolyte, and dissolves in water to ionize ammonium ions and chloride ions. The aqueous solution is weakly acidic, and the acidity increases when heated. Because the ammonium ions ionized in water hydrolyze to make the solution acidic, the pH value of the saturated ammonium chloride solution is about 5.6 at normal temperature.
Paraphthaloyl chloride is an organic phase functional monomer, urea formaldehyde and paraphthaloyl chloride are used as reaction monomers, and a composite layer membrane can be formed by blending on a reverse osmosis Polysulfone (PSF) base membrane and a forward osmosis Polysulfone (PSF) base membrane through an interfacial polymerization reaction. The membrane has better result for separating low molecular weight organic matter from electrolyte. A series of reverse osmosis composite membranes can be prepared by the interfacial polycondensation reaction of the compound and o-phenylenediamine (OPPD).
The o-phenylenediamine (OPPD) can produce unsaturated polyester resin, and the product has excellent flexibility and leveling property.
The urea-formaldehyde is a white odorless solid, and the appearance of the urea-formaldehyde is divided into granular and powdery shapes; it provides a slow release of nitrogen in a polymer bound to carbon, with a low salt index, and the nitrogen will be slowly decomposed by water in 12 to 16 weeks. When ammonium chloride is used as the curing agent, the curing agent can be cured at room temperature. The product is insoluble and infusible thermosetting resin. The cured urea-formaldehyde resin is lighter in color than phenolic resin, semitransparent, weak acid and weak base resistant, good in insulating property and excellent in wear resistance, but is easy to decompose when meeting strong acid and strong base, and poor in weather resistance. Urea formaldehyde can be combined with polyamine in acid chloride solution to form the desalting layer resin of membrane.
In the preparation method provided by the invention, because the range of the parts of various medicaments is changed, the pH value range fluctuation exists in the preparation process, the pH value needs to be analyzed at any time in the preparation process, and according to the pH value condition, citric acid is used for adjusting the pH value to be between 1.0 and 6.0, and the optimal value is 2.5 to 5.0.
The membrane pretreatment component selected in the invention thoroughly kills membrane bacteria, fungi and algae through isothiazolinone; then adding citric acid to Ca in the water 2+ 、Mg 2+ The damaged fibers are activated by the characteristics of excellent chelation of metal ions, biodegradability, dispersion, strong anti-redeposition capacity and the like; then oxalic acid is used for treating Fe in water 3+ Reducing by plasma oxidizing metal ions; finally, the broken fiber is activated by sodium dodecyl sulfate.
The membrane repairing component can repair the broken part of the membrane by taking a polysulfone porous membrane reinforced by non-woven fabrics and having the aperture of about 15nm as a supporting base membrane and taking terephthaloyl chloride and o-phenylenediamine (OPDA) as main monomers to separate the membrane, and the influence of the concentration of the acyl chloride and the aniline on the membrane performance is that an aqueous phase containing the aniline and an organic phase containing the terephthaloyl chloride generate interfacial polymerization reaction on the surface of the polysulfone porous supporting membrane to form an ultrathin composite layer. The concentrations of aniline and acyl chloride have certain influence on the membrane performance, and the water flux and the desalination rate of the membrane can be changed by adjusting the concentrations of aniline and acyl chloride; o-phenylenediamine (OPDA) can also ensure leveling and flexibility of the film repair surface.
According to the invention, the pretreatment component and the repair component are innovatively and comprehensively considered and compatible for use, so that the desalination rate of the membrane is improved, the water yield of the membrane is ensured, and the service life of the membrane is greatly prolonged.
The repairing agent is mainly suitable for repairing the reverse osmosis membrane and the forward osmosis membrane in an online state at normal temperature after the reverse osmosis membrane and the forward osmosis membrane are thoroughly cleaned in a shutdown state. Because the membrane repairing component and the membrane pretreatment component are adopted, the invention has better repairing effect and saves repairing medicament, and can ensure that the desalting rate and the water flux repairing effect after the membrane is repaired are that the desalting rate is improved by more than or equal to 50 percent, the water yield is reduced by less than or equal to 10 percent, and the retention rate maintaining time (before the membrane is repaired) is more than or equal to 6 months.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
FIG. 1 is a graph showing the performance of a reverse osmosis membrane of example 1 of the present invention before and after repair;
FIG. 2 is a graph showing the performance of a forward osmosis membrane of example 2 of the present invention before and after remediation;
FIG. 3 is a graph showing the performance of a seawater desalination membrane (reverse osmosis membrane) before and after restoration in example 3 of the present invention.
Detailed Description
Unless otherwise specified, the parts used in the present invention are parts by mass.
Example 1
The membrane pretreatment component of the reverse osmosis and forward osmosis membrane repairing agent is 24.3 parts; the film repairing component is 60 parts; 7 parts of an acid regulator; 200 parts of water. The reflux synthesis is carried out by controlling the temperature at 60-90 ℃ for 4h under normal pressure, and the reflux synthesis method adopts a conventional mode.
The preparation method comprises the following steps:
(1) Adding 35 parts of ammonium chloride, 10 parts of terephthaloyl chloride, 5 parts of o-phenylenediamine (OPDA) and 10 parts of urea formaldehyde into water in a reactor with stirring, and uniformly stirring; heating to 85-90 deg.C, and stirring for 2-3h; the pH was analyzed during stirring and was adjusted to between 2.5 and 4.5 using citric acid.
(2) Under normal pressure, controlling the temperature to be 65-70 ℃, sequentially adding 12 parts of isothiazolinone, 12 parts of oxalic acid and 0.3 part of sodium dodecyl sulfate according to parts, and stirring and dissolving uniformly; stirring for 2-3h; the pH was analyzed during stirring and adjusted to between 2.5 and 4.5 using an acidic adjusting agent.
The agent is used in reverse osmosis membrane system of power plant, and the reverse osmosis membrane system comprises multiple sets of parallel equipment, and 2 sets of equipment with similar state are selected, wherein 1 set (1 set) # ) The medicine is used for repairing, and 1 set of the medicine (2) is added # ) Comparative experiments were carried out without repair (the electricity)Membrane washing once in 3 months in the factory).
The using method comprises the following steps:
(1) Thorough cleaning 1 # A membrane system is washed to be neutral by reverse osmosis water;
(2) Adjusting pH value to 2.5-3.5 with citric acid, feeding into membrane system, controlling temperature to 35-45 deg.C, pressure of concentrated water at 2bar, circulating for 4-5 hr, and soaking for 8-9 hr;
(3) And (5) thoroughly washing the membrane system to be neutral, and starting up to test the salt rejection performance of the system.
The test results are shown in FIG. 1 (Water yield Unit: m) 3 H, conductivity unit: μ S/cm). From the data of FIG. 1, 1 # The system, after being repaired with the agent of the invention: the water production conductivity is obviously reduced by 61 percent and the water production rate is reduced by 7 percent; the water yield is stable and almost not reduced, and 2 # The water yield of the system is not changed greatly, the water yield conductance is increased by 24.4 percent, and the repairing effect is obvious.
Example 2
The membrane pretreatment component of the reverse osmosis membrane and forward osmosis membrane repairing agent is 28.5 parts; 63 parts of a membrane repair component; 6 parts of an acid regulator; 190 parts of water. The reflux synthesis is carried out by controlling the temperature at 60-90 ℃ for 4h under normal pressure, and the reflux synthesis method adopts a conventional mode.
The preparation method comprises the following steps:
(1) Adding 40 parts of ammonium chloride, 15 parts of terephthaloyl chloride and 8 parts of urea formaldehyde into water in a reactor with stirring, and uniformly stirring; heating to 85-90 deg.C, and stirring for 2-3h; the pH was analyzed during stirring and was adjusted to between 3.0 and 4.5 using citric acid.
(2) Under normal pressure, controlling the temperature to be 60-70 ℃, sequentially adding 16 parts of isothiazolinone, 12 parts of oxalic acid and 0.5 part of sodium dodecyl sulfate according to parts, and stirring and dissolving uniformly; stirring for 2-3h; the pH was analyzed during stirring and adjusted to between 2.5 and 5.0 using an acidic adjusting agent.
The agent is applied to a forward osmosis membrane system of a certain garbage disposal site, and the main process of the forward osmosis membrane system adopts ultrafiltration and forward osmosisOsmosis, mainly for removing salts from the system, in which 1 # Adding the medicament of the invention into the unit, and carrying out a repair test; 2 # The unit was used for comparison.
The using method comprises the following steps:
(1) Thorough cleaning 1 # A membrane system is washed to be neutral by desalted water;
(2) Adjusting pH value to 2.5-3.0 with citric acid, feeding into membrane system, controlling temperature to 30-40 deg.C and pressure of concentrated water at 2bar, circulating for 5-6 hr, and soaking for 9-10 hr;
(3) And (4) thoroughly washing the membrane system to be neutral, and testing the desalination rate performance of the system when the system is started.
The test results are shown in FIG. 2 (water yield unit: m) 3 H, conductivity unit: μ S/cm). From the data in FIG. 2, 1 # The system, after being repaired with the agent of the invention: the water yield conductance is reduced remarkably by 64.5 percent, and the water yield is not changed greatly; the water yield is stable and almost not reduced, and 2 # The water yield of the system is not changed greatly, the water yield conductance has an ascending trend, and the repair effect is obviously compared.
Example 3
The membrane pretreatment component of the reverse osmosis and forward osmosis membrane repairing agent is 20.3 parts; 67 parts of a membrane repair component; 7 parts of an acid regulator; and 180 parts of water. The reflux synthesis method is characterized in that the reflux is stirred for 4 hours at the temperature of 60-90 ℃ under normal pressure to dissolve and synthesize the materials uniformly, and the reflux synthesis method adopts a conventional mode.
The preparation method comprises the following steps:
(1) Adding 45 parts of ammonium chloride, 10 parts of terephthaloyl chloride, 3 parts of o-phenylenediamine (OPDA) and 9 parts of urea formaldehyde into water in a reactor with a stirrer, and uniformly stirring; heating to 80-85 deg.C, and stirring for 2-3h; the pH was analyzed during stirring and was adjusted to between 2.5 and 4.0 using citric acid.
(2) Under normal pressure, controlling the temperature to be 60-65 ℃, sequentially adding 10 parts of isothiazolinone, 10 parts of oxalic acid and 0.3 part of sodium dodecyl sulfate according to parts, and stirring and dissolving uniformly; stirring for 2-3h; the pH was analyzed during stirring and adjusted to between 2.5 and 4.0 using an acidic adjusting agent.
The agent is applied to a seawater desalination system of a power plant, and the seawater desalination system comprises a plurality of sets of parallel equipment, 2 sets of equipment with similar states are selected, wherein 1 set (1 set) # ) The medicine is used for repairing, and 1 set of the medicine (2) is added # ) Comparative tests were performed without remediation (the plant was washed once in 3 months).
The using method comprises the following steps:
(1) Thorough cleaning 1 # A membrane system is washed to be neutral by desalted water;
(2) Adjusting pH value of the prepared membrane repairing agent to 2.5-4.0 with citric acid, feeding into a membrane system, controlling temperature to 35-50 deg.C and pressure of concentrated water to 2bar, circulating for 4-5 hr, and soaking for 10-12 hr;
(3) And (4) thoroughly washing the membrane system to be neutral, and testing the desalination rate performance of the system when the system is started.
The test results are shown in FIG. 3 (water yield unit: m) 3 H, conductivity unit: μ S/cm). From the data of FIG. 3, 1 # The system, after being repaired with the agent of the invention: the water yield conductance is reduced remarkably by 65.6 percent, and the water yield is not changed greatly; the water yield is stable and almost not reduced, and 2 # The water yield of the system is not changed greatly, the water yield conductivity of the system has an ascending trend, and the repairing effect is obviously compared.
Claims (7)
1. A reverse osmosis and forward osmosis membrane remediation agent comprising the following components:
membrane pretreatment components: 20-40 parts;
membrane repair components: 50-80 parts;
acid regulator: 5-10 parts;
water: 80-200 parts.
2. A reverse osmosis and forward osmosis membrane remediation agent according to claim 1, wherein:
the membrane pretreatment component comprises isothiazolinone and derivatives thereof, sodium bisulfite or oxalic acid, dodecyl benzene sulfonate and one or a mixture of a plurality of dodecyl sulfate;
the membrane repairing component comprises one or a mixture of more of ammonium chloride, acyl chloride, amine and aldehyde;
the acidity regulator comprises citric acid.
3. A reverse osmosis and forward osmosis membrane remediation agent according to claim 2, wherein:
the membrane pretreatment component comprises one or a mixture of more of isothiazolinone, oxalic acid and lauryl sodium sulfate;
the membrane repairing component comprises one or a mixture of more of ammonium chloride, terephthaloyl chloride, o-phenylenediamine and urea formaldehyde.
4. A reverse osmosis and forward osmosis membrane remediation agent according to claim 1 wherein the reverse osmosis and forward osmosis membrane remediation agent has a pH in the range of from 1.0 to 6.0.
5. The reverse osmosis and forward osmosis membrane remediation agent of claim 4, wherein the reverse osmosis and forward osmosis membrane remediation agent has a pH in the range of 2.5 to 5.0.
6. A method of preparing a reverse osmosis and forward osmosis membrane remediation agent according to claim 1 comprising the steps of:
(1) Adding the membrane repairing component and the membrane pretreatment component into water according to the mass part in a reactor with stirring, and uniformly stirring;
(2) Under normal pressure, the temperature is controlled to be 60-90 ℃, and the stirring speed is controlled to be 60r/min;
(3) Stirring for 2-4h under normal pressure while controlling the temperature and stirring speed, analyzing pH value during stirring, and adjusting pH value to 2.5-5.0 with citric acid.
7. A method of using a reverse osmosis and forward osmosis membrane remediation agent, comprising the steps of:
(1) Thoroughly cleaning the membrane system, and washing the membrane system to be neutral by reverse osmosis water;
(2) Preparing a membrane repairing agent according to the method of claim 6, adjusting the pH value to be between 2.0 and 4.0 by using citric acid, feeding the membrane repairing agent into a membrane system, controlling the temperature to be between 35 and 60 ℃, controlling the pressure of concentrated water to be 2bar, circulating for 4 to 6 hours, and soaking for not less than 8 hours;
(3) And (4) thoroughly flushing the membrane system to be neutral, and testing the salt rejection rate and the water production performance of the system by starting.
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| CN115814605A (en) * | 2022-12-06 | 2023-03-21 | 浙江大学 | Waste reverse osmosis membrane repairing agent and repairing method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007090288A (en) * | 2005-09-30 | 2007-04-12 | Toray Ind Inc | Reverse osmosis membrane separation method and reverse osmosis membrane separation apparatus |
| CN103521078A (en) * | 2013-09-22 | 2014-01-22 | 北京碧水源膜科技有限公司 | Preparation method of membrane element of reverse osmosis membrane capable of quickly improving flux |
| JP2014046285A (en) * | 2012-08-31 | 2014-03-17 | Ngk Insulators Ltd | Strength inspection apparatus of monolith type separation membrane structure |
| CN105056766A (en) * | 2015-06-30 | 2015-11-18 | 苏州佑君环境科技有限公司 | Reverse osmosis scale inhibitor and preparation method thereof |
| CN108176237A (en) * | 2017-12-29 | 2018-06-19 | 广州安赛化工有限公司 | High-efficiency non-phosphate is reverse osmosis to use dirt dispersion agent |
| CN109289539A (en) * | 2018-09-18 | 2019-02-01 | 中国海洋石油集团有限公司 | A kind of brine refining nanofiltration membrane cleaning agent and preparation method thereof |
| CN109351198A (en) * | 2018-12-12 | 2019-02-19 | 济南恩沃商贸有限公司 | Positive infiltration, nanofiltration and reverse osmosis membrane salt rejection rate renovation agent and restorative procedure |
| CN109499383A (en) * | 2018-11-22 | 2019-03-22 | 唐山钢铁集团有限责任公司 | A kind of RO film healant and method for repairing and mending |
| CN109569308A (en) * | 2018-11-16 | 2019-04-05 | 杭州水处理技术研究开发中心有限公司 | A kind of acid absorbent system prepares the preparation method of high-flux reverse osmosis membrane |
| CN111729515A (en) * | 2020-07-29 | 2020-10-02 | 青岛沁安化工科技有限公司 | Nanofiltration membrane repairing agent for brine refining and preparation method thereof |
| CN112588120A (en) * | 2020-12-25 | 2021-04-02 | 上海丰信环保科技有限公司 | Reverse osmosis membrane repairing agent and repairing method |
| CN114130204A (en) * | 2021-12-11 | 2022-03-04 | 青岛沁安化工科技有限公司 | Forward osmosis, reverse osmosis and nanofiltration membrane anti-attenuation medicament and preparation method thereof |
-
2022
- 2022-07-22 CN CN202210860971.8A patent/CN115155323A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007090288A (en) * | 2005-09-30 | 2007-04-12 | Toray Ind Inc | Reverse osmosis membrane separation method and reverse osmosis membrane separation apparatus |
| JP2014046285A (en) * | 2012-08-31 | 2014-03-17 | Ngk Insulators Ltd | Strength inspection apparatus of monolith type separation membrane structure |
| CN103521078A (en) * | 2013-09-22 | 2014-01-22 | 北京碧水源膜科技有限公司 | Preparation method of membrane element of reverse osmosis membrane capable of quickly improving flux |
| CN105056766A (en) * | 2015-06-30 | 2015-11-18 | 苏州佑君环境科技有限公司 | Reverse osmosis scale inhibitor and preparation method thereof |
| CN108176237A (en) * | 2017-12-29 | 2018-06-19 | 广州安赛化工有限公司 | High-efficiency non-phosphate is reverse osmosis to use dirt dispersion agent |
| CN109289539A (en) * | 2018-09-18 | 2019-02-01 | 中国海洋石油集团有限公司 | A kind of brine refining nanofiltration membrane cleaning agent and preparation method thereof |
| CN109569308A (en) * | 2018-11-16 | 2019-04-05 | 杭州水处理技术研究开发中心有限公司 | A kind of acid absorbent system prepares the preparation method of high-flux reverse osmosis membrane |
| CN109499383A (en) * | 2018-11-22 | 2019-03-22 | 唐山钢铁集团有限责任公司 | A kind of RO film healant and method for repairing and mending |
| CN109351198A (en) * | 2018-12-12 | 2019-02-19 | 济南恩沃商贸有限公司 | Positive infiltration, nanofiltration and reverse osmosis membrane salt rejection rate renovation agent and restorative procedure |
| CN111729515A (en) * | 2020-07-29 | 2020-10-02 | 青岛沁安化工科技有限公司 | Nanofiltration membrane repairing agent for brine refining and preparation method thereof |
| CN112588120A (en) * | 2020-12-25 | 2021-04-02 | 上海丰信环保科技有限公司 | Reverse osmosis membrane repairing agent and repairing method |
| CN114130204A (en) * | 2021-12-11 | 2022-03-04 | 青岛沁安化工科技有限公司 | Forward osmosis, reverse osmosis and nanofiltration membrane anti-attenuation medicament and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115814605A (en) * | 2022-12-06 | 2023-03-21 | 浙江大学 | Waste reverse osmosis membrane repairing agent and repairing method |
| CN115814605B (en) * | 2022-12-06 | 2024-04-12 | 浙江大学 | Waste reverse osmosis membrane repairing agent and repairing method |
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