CN115417472A - Reverse osmosis ultrahigh-pressure reverse osmosis treatment system and treatment method thereof - Google Patents
Reverse osmosis ultrahigh-pressure reverse osmosis treatment system and treatment method thereof Download PDFInfo
- Publication number
- CN115417472A CN115417472A CN202211024169.1A CN202211024169A CN115417472A CN 115417472 A CN115417472 A CN 115417472A CN 202211024169 A CN202211024169 A CN 202211024169A CN 115417472 A CN115417472 A CN 115417472A
- Authority
- CN
- China
- Prior art keywords
- reverse osmosis
- membrane
- pressure
- pumping
- solute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- 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 provides a reverse osmosis ultrahigh pressure reverse osmosis treatment system and a treatment method thereof, which relate to the technical field of reverse osmosis water treatment, wherein inlet water is pretreated by a pretreatment device, and the pretreated inlet water is filtered by a microfiltration filter; carrying out ultrahigh pressure reverse osmosis treatment on the filtered inlet water through an ultrahigh pressure pump and a reverse osmosis device; establishing a permeation model through a processor for analysis to obtain a deviation correction quantization ratio of the reverse osmosis device, judging whether the ratio of the deviation correction quantization ratio is within an allowable range, and if not, calculating pumping pressure and pumping rate to be adjusted; the pumping pressure of the ultrahigh pressure pump is adjusted by the controller to realize the control of the transmembrane pressure difference of the reverse osmosis device and the pumping rate of the pumping rate to realize the control of the transmembrane pressure difference of the reverse osmosis device.
Description
Technical Field
The invention relates to the technical field of reverse osmosis water treatment, in particular to a reverse osmosis ultrahigh pressure reverse osmosis treatment system and a treatment method thereof.
Background
In the development of economy in China, the development of chemical industry occupies the main position in national economy. In the development process of various petrochemical and coal chemical enterprises, the problem of sewage discharge is always the key point of attention of people. The chemical wastewater has high acid-base content and complex components, and if the chemical wastewater is directly discharged into rivers, lakes and seas without being treated, the chemical wastewater has serious pollution to water resources. The land through which the water source flows can cause certain corrosion and secondary pollution, and the production and life quality of people is greatly influenced. However, the current sewage treatment technology has certain difficulties, and the paper mainly carries out practical research on the chemical sewage membrane treatment technology in China.
Reverse osmosis water treatment is to filter wastewater or seawater and other wastewater through reverse osmosis equipment to produce clear to pure water; under the environment that ordinary reverse osmosis and high-pressure sea-fresh reverse osmosis with high salt content of wastewater (30000-50000 mg/L) cannot be used, in order to meet the process requirements of industrial wastewater and material concentration markets for high-rate concentration, ultrahigh-pressure reverse osmosis equipment is gradually optimized in the prior art to meet the process requirements, and ultrahigh-pressure reverse osmosis equipment can be applied to any wastewater system which can be filtered and concentrated by reverse osmosis, so that the use efficiency of the ultrahigh-pressure reverse osmosis equipment in the industry is greatly improved; and the ultrahigh pressure reverse osmosis equipment comprises a storage tank, a multi-media filter, an activated carbon filter, a doser, a precision filter and a membrane element. When the ultrahigh-pressure reverse osmosis equipment is used for filtering wastewater, the wastewater firstly enters a storage tank for precipitation, then the wastewater is sequentially introduced into a multi-media filter, an activated carbon filter and a precision filter through a high-pressure pump, then the wastewater is pressurized through the high-pressure pump, the wastewater is filtered by using a membrane element with the aperture of 1/10000 mu m, the water with higher impurity content is changed into pure water, and simultaneously, a large amount of impurities mixed into the water, such as industrial pollutants, heavy metals, bacteria, viruses and the like, are completely isolated, so that drinking water with specified physicochemical indexes and sanitary standards is obtained.
In the prior art, patent document CN108911222a discloses a membrane treatment device for reclaimed water reuse and a control method thereof, the membrane treatment device comprises a membrane device support, and a plurality of ultrafiltration membranes, reverse osmosis water inlet pumps, reverse osmosis cartridge filters, reverse osmosis high-pressure pumps, cleaning water pumps, ultrafiltration water inlet pumps, ultrafiltration cartridge filters and ultrafiltration backwashing pumps are arranged on the membrane device support. Although the device has the characteristics of compact structure, complete functions, high integration degree, small occupied area, convenient installation and maintenance and high sewage reuse rate. But this technical scheme is only applicable to handle cleaner raw water, and the commonality is not high, and the treatment effect will receive very big influence, and the running cost is high, and the operation degree of difficulty is big.
For another example, patent document CN103058326a discloses a sewage treatment method, in which pretreated printing and dyeing wastewater enters a sedimentation tank for sedimentation; the immersed ultrafiltration membrane in the immersed ultrafiltration pool sucks and filters produced water through a self-priming pump and enters the ultrafiltration water production pool, and the immersed ultrafiltration membrane is a polyvinylidene fluoride hollow fiber membrane; and (3) the water in the ultrafiltration water production tank is divided into two paths, one path of water is conveyed to a dyeing workshop through a water supply pump to be dyed with dark cloth, the other path of water is conveyed to reverse osmosis equipment through a booster pump to be subjected to advanced treatment, and after the salt is removed, the reverse osmosis water is discharged to a reuse tank and can be reused at a reuse point. But the technical scheme still has the problems of insufficient membrane strength, easy damage, insufficient membrane diffusion amount, easy blockage and unclean backwashing.
Disclosure of Invention
In order to solve the technical problem, the invention provides a reverse osmosis ultrahigh pressure reverse osmosis treatment method which comprises the following steps:
s1, pretreating inlet water through a pretreatment device, and filtering the pretreated inlet water through a microfiltration filter;
s2, performing ultrahigh pressure reverse osmosis treatment on the filtered inlet water through an ultrahigh pressure pump and a reverse osmosis device;
s3, analyzing the permeation model established by the processor to obtain a deviation correction quantization ratio of the reverse osmosis device, judging whether the ratio of the deviation correction quantization ratio is within an allowable range, and if not, calculating the pumping pressure and the pumping rate which need to be adjusted;
and S4, controlling the transmembrane pressure difference of the reverse osmosis device by adjusting the pumping pressure of the ultra-high pressure pump through the controller and controlling the osmotic pressure difference of the reverse osmosis device by adjusting the pumping rate of the pumping rate.
Further, in the step S3, the diffusion amount expression of the solutes and water molecules of the permeation model is as follows:
wherein, J W Represents the amount of water diffusion; j. the design is a square S Represents the amount of solute diffusion; Δ p is the pressure difference across the membrane,
as the osmotic pressure difference, A is the osmotic coefficient, D m Represents the diffusion coefficient of solvent molecules in the film; km represents the distribution coefficient of solute molecules on the membrane surface; x represents the distance within the film relative to the film surface; l represents the thickness of the membrane separation layer; c m0 、C ml Respectively representing the concentration of solute molecules in the original solution and the penetrating fluid on the surface of the membrane; b represents the theoretical permeability coefficient of the solute molecule.
Further, a deviation correction algorithm is used for calculating a concentration polarization factor CP, and the expression is as follows:
in the formula, C fm Representing the real concentration of solute molecules of the original solution on the surface of the membrane; k represents the permeability coefficient, the actual permeability coefficient B of the membrane surface solute taking into account the true concentration of solute molecules on the membrane surface P The following formula:
the offset-corrected quantization ratio is:
correcting the deviation by the adjustment of the CP value by the quantization ratio B CP The ratio of B/C is controlled between 0.8 and 1.
Further, the osmotic pressure of a single solute solution is calculated using the following equation:
in the formula, a l Activity of solution, V l The molar volume of the solution, R is the rejection rate of the reverse osmosis membrane to the solution, and T is the liquid temperature;
when multiple solutes are present in the solution, the osmotic pressure is calculated using the formula:
in the formula, V i 、C i Respectively representing the volume and molarity of the solute; a represents a permeability coefficient.
The invention also provides a reverse osmosis ultrahigh pressure reverse osmosis treatment system, which is used for realizing the reverse osmosis treatment method and comprises the following steps: the device comprises a pretreatment device, a microfiltration filter, a reverse osmosis device, a processor, a controller, a concentration tank and a pure water tank;
an air pump is connected between the microfiltration filter and the pretreatment device; an ultrahigh pressure pump is arranged between the microfiltration filter and the ultrahigh pressure reverse osmosis device; the inlets of the concentration tank and the pure water tank are respectively connected to the outlet of the reverse osmosis device; a suction pump is arranged between the concentration tank and the reverse osmosis device and is used for sucking the concentrated liquid to the concentration tank at an adjustable speed;
the processor is used for establishing a permeation model for analysis to obtain a deviation correction quantization ratio of the reverse osmosis device, calculating a pumping pressure and a suction rate to be adjusted, and feeding back the pumping pressure of the ultra-high pressure pump and the suction rate of the suction pump to be adjusted to the controller;
the controller adjusts the pumping pressure of the ultra-high pressure pump according to the feedback parameters to realize the control of the transmembrane pressure difference of the reverse osmosis device and adjusts the pumping rate of the pumping rate to realize the control of the transmembrane pressure difference of the reverse osmosis device.
Further, a reverse osmosis membrane is arranged in the reverse osmosis device and is a spiral winding reverse osmosis membrane or a hollow fiber reverse osmosis membrane.
Compared with the prior art, the invention has the following technical effects:
true concentration of solute molecules C at the membrane surface fm The calculation process of (A) introduces a deviation correction algorithm, obtains the quantization ratio of deviation correction factors of the reverse osmosis device by establishing a permeation model analysis, and judges whether the ratio of the quantization ratio is within an allowable range, thereby comparing the quantization ratio B with the quantization ratio B PP The ratio of B/B is controlled between 0.8 and 1, namely the value of the concentration polarization factor CP needs to be controlled between 1.25 and 1 to ensure that the actual osmotic coefficient deviation of solute molecules is within an allowable range; if not, calculating the pumping pressure and the pumping rate which need to be adjusted; the control of the transmembrane pressure difference of the reverse osmosis device is realized by adjusting the pumping pressure of the ultrahigh pressure pump through the controller, and the control of the osmotic pressure difference of the reverse osmosis device is realized by the pumping rate of the pumping rate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a reverse osmosis ultrahigh pressure reverse osmosis treatment system of the present invention;
FIG. 2 is a flow chart of the reverse osmosis ultrahigh pressure reverse osmosis treatment method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the drawings of the embodiments of the present invention, in order to better and more clearly describe the working principle of each element in the system, the connection relationship of each part in the apparatus is shown, only the relative position relationship between each element is clearly distinguished, and the restriction on the signal transmission direction, the connection sequence, and the size, the dimension, and the shape of each part structure in the element or structure cannot be formed.
As shown in fig. 1, a schematic structural diagram of a reverse osmosis ultrahigh pressure reverse osmosis treatment system of the present invention includes: the device comprises a pretreatment device, a microfiltration filter, a reverse osmosis device, a processor, a controller, a concentration tank and a pure water tank.
An air pump is connected between the microfiltration filter and the pretreatment device, an ultra-high pressure pump is arranged between the microfiltration filter and the reverse osmosis device, and inlets of the concentration tank and the pure water tank are respectively connected to an outlet of the reverse osmosis device. A suction pump is disposed between the concentration tank and the reverse osmosis unit for pumping the concentrate to the concentration tank at an adjustable rate.
The pretreatment device is used for pretreating inlet water, suspended matters, colloids, organic matters and the like in raw water can be flocculated by adding a flocculating agent into the raw water, and particles which are difficult to settle in the water are mutually polymerized and enlarged to form flocs with relatively large particle sizes, so that the flocs can be removed by natural precipitation or filtration separation. The pretreatment removes suspended particles larger than 300 mu m in the water, and protects the membrane element port of the reverse osmosis device from being scratched and damaged by large particle substances.
Most of bacteria, algae, colloidal substances and tiny particulate substances are trapped on the surface of the microfiltration membrane after being filtered by the microfiltration membrane. After a period of filtration, the microfiltration filter needs to be back flushed regularly.
The reverse osmosis apparatus separates pure water from the liquid pressurized to an ultrahigh pressure by the ultrahigh pressure pump through the reverse osmosis membrane, and discharges the pure water and the concentrated liquid. The reverse osmosis device is internally provided with a reverse osmosis membrane. Reverse osmosis, also known as reverse osmosis, is a membrane separation operation that uses pressure differential as a driving force to separate pure water from a solution. Pressure is applied to the stock solution on one side of the reverse osmosis membrane and when the pressure exceeds its osmotic pressure, water will reverse osmosis against the direction of natural osmosis. Thereby obtaining a permeated solution, namely pure water, on the low-pressure side of the reverse osmosis membrane; the high pressure side obtains a concentrated solution, i.e. a concentrated solution or waste water.
The reverse osmosis membrane can be any shape of membrane, such as a spiral wound reverse osmosis membrane, a hollow fiber reverse osmosis membrane, or the like.
The reverse osmosis device comprises a processor, a controller and a control module, wherein the processor is connected with the reverse osmosis device and is used for analyzing the reverse osmosis performance of the reverse osmosis device, the deviation correction quantization ratio of the reverse osmosis device is obtained in the processor through establishing a permeation model analysis, whether the deviation correction quantization ratio is within an allowable range or not is judged, if the deviation correction quantization ratio is not within the allowable range, the pumping pressure and the pumping rate to be adjusted are calculated, and the controller is used for adjusting the pumping pressure of the ultrahigh pressure pump to realize the control of the transmembrane pressure difference of the reverse osmosis device and the pumping rate of the pumping rate to realize the control of the osmotic pressure difference of the reverse osmosis device.
Specifically, the construction of the osmosis model is based on the principle that water and solute are transported in a reverse osmosis membrane in a dissolution-diffusion mode, the transport of water is driven by the transmembrane pressure difference, the water diffusion quantity is in direct proportion to the difference between the transmembrane pressure difference and the transmembrane osmotic pressure difference, the transport of solute is driven by the concentration difference between stock solution and penetrating fluid, and the solute diffusion quantity is in direct proportion to the membrane pressure difference concentration difference.
In the permeation model, the diffusion amount expression of solutes and water molecules is as follows:
in the formula J W Indicates the amount of water diffusion (L m) -2 h -1 )；J S Represents the amount of solute diffused (mol m) -2 h -1 ) (ii) a Δ p is the pressure difference across the membrane,
is the osmotic pressure difference, A is the osmotic coefficient, D m Represents the diffusion coefficient of solvent molecules in the film; km represents the distribution coefficient of solute molecules on the membrane surface; x represents the distance within the film relative to the film surface; l represents the thickness of the membrane separation layer; c m0 、C ml Respectively representing the concentration (g/L) of solute molecules in the membrane surface original solution and the penetrating fluid; b represents the theoretical permeability coefficient of the solute molecule.
Cp is the permeate concentration (g/L) and is calculated from the following formula (3):
from equations (2) and (3), the calculation formula of the solute theoretical permeability coefficient B can be obtained:
because the concentration polarization phenomenon often occurs on the membrane surface of the reverse osmosis device, the concentration of solute molecules on the membrane surface in the formula (3) is deviated from the concentration of a concentration polarization layer on the actual membrane surface, and the calculated B value often cannot represent the actual permeability coefficient of the solute molecules, thereby bringing certain uncertainty to the control of various conditions in the operation process. Thus, the present example shows the true concentration C of solute molecules at the membrane surface fm The calculation process of (2) introduces an offset correction algorithm.
Under a stable state, the convection and diffusion of the concentration polarization layer reach balance, the solute molecular diffusion quantity is kept unchanged, and a concentration polarization factor CP is calculated by using a deviation correction algorithm, wherein the expression is as follows:
in the formula, C fm Representing the real concentration of solute molecules of the original solution on the surface of the membrane; k represents a permeability coefficient (m/s), and C represents fm By substitution of C in formula (4) f Obtaining an actual permeation of the membrane surface solute taking into account the true concentration of the membrane surface solute moleculesCoefficient B P (L m -2 h -1 ) The following formula:
thus, if there is a deviation in the actual permeability coefficient of the solute molecule, the deviation corrects the quantization ratio to be:
therefore, the offset needs to be corrected by the quantization ratio B PP The ratio of B/B is controlled between 0.8 and 1, i.e. the concentration polarization factor CP value needs to be controlled between 1.25 and 1 to ensure that the actual permeability coefficient deviation of the solute molecules is within the allowable range.
According to the expression (5) of the concentration polarization factor CP and the expression (1) of the water diffusion quantity, the value of the transmembrane pressure difference delta p is adjusted by controlling the pumping pressure of the ultra-high pressure pump, so that the water diffusion quantity J is changed W The adjustment of the CP value can be realized.
The osmotic pressure of a single solute solution can be calculated using the following formula (8):
in the formula, a l Activity of solution, V l The molar volume of the solution, R is the rejection rate of the reverse osmosis membrane on the solution, and T is the liquid temperature.
When a plurality of solutes are present in the solution, the osmotic pressure is calculated by the following formula (9):
in the formula, V i 、C i Respectively representing the volume and the molar concentration of the solute; a represents the permeability coefficient and can be calculated by experiments.
It can be seen that the osmotic pressure difference
The adjustment of (b) may be achieved by controlling the volume of concentrate in the reverse osmosis unit by controlling the suction rate of the suction pump.
The processor is used for realizing the calculation process, and feeding back the pumping pressure of the ultra-high pressure pump and the suction rate of the suction pump to be regulated to the controller according to the calculation result, and the controller adjusts the pumping pressure of the ultra-high pressure pump according to the feedback parameters to realize the control of the transmembrane pressure difference of the reverse osmosis device and the suction rate of the suction rate to realize the control of the osmotic pressure difference of the reverse osmosis device.
As shown in fig. 2, a flow chart of the reverse osmosis ultrahigh pressure reverse osmosis treatment method of the present invention comprises the following steps:
s1, pretreating inlet water through a pretreatment device, and filtering the pretreated inlet water through a microfiltration filter;
s2, performing ultrahigh pressure reverse osmosis treatment on the filtered inlet water through an ultrahigh pressure pump and a reverse osmosis device;
s3, analyzing the permeation model established by the processor to obtain a deviation correction quantization ratio of the reverse osmosis device, judging whether the ratio of the deviation correction quantization ratio is within an allowable range, and if not, calculating the pumping pressure and the pumping rate to be adjusted;
and S4, controlling the transmembrane pressure difference of the reverse osmosis device by adjusting the pumping pressure of the ultra-high pressure pump through the controller, and controlling the osmotic pressure difference of the reverse osmosis device by the pumping rate of the pumping rate.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in or transmitted over a computer-readable storage medium. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A reverse osmosis ultrahigh pressure reverse osmosis treatment method is characterized by comprising the following steps:
s1, pretreating inlet water through a pretreatment device, and filtering the pretreated inlet water through a microfiltration filter;
s2, performing ultrahigh pressure reverse osmosis treatment on the filtered inlet water through an ultrahigh pressure pump and a reverse osmosis device;
s3, analyzing the permeation model established by the processor to obtain a deviation correction quantization ratio of the reverse osmosis device, judging whether the ratio of the deviation correction quantization ratio is within an allowable range, and if not, calculating the pumping pressure and the pumping rate which need to be adjusted;
and S4, controlling the transmembrane pressure difference of the reverse osmosis device by adjusting the pumping pressure of the ultra-high pressure pump through the controller and controlling the osmotic pressure difference of the reverse osmosis device by adjusting the pumping rate of the pumping rate.
2. The reverse osmosis treatment method according to claim 1, wherein in the step S3, the diffusion amount of the solutes and water molecules of the osmosis model is expressed as follows:
wherein, J W Represents the amount of water diffusion; j. the design is a square S Represents the amount of solute diffusion; Δ p is the pressure difference across the membrane,
is the osmotic pressure difference, A is the osmotic coefficient, D m Represents the diffusion coefficient of solvent molecules in the film; km represents the distribution coefficient of solute molecules on the membrane surface; x represents the distance within the film relative to the film surface; l represents the membrane separation layer thickness; c m0 、C ml Respectively representing the concentration of solute molecules in the original solution and the penetrating fluid on the surface of the membrane; b represents the theoretical permeability coefficient of the solute molecule.
3. The reverse osmosis treatment method according to claim 2, wherein the concentration polarization factor CP is calculated by a bias correction algorithm, and the expression is as follows:
in the formula, C fm Representing the real concentration of solute molecules of the original solution on the surface of the membrane; k represents the permeability coefficient, the actual permeability coefficient B of the membrane surface solute taking into account the true concentration of solute molecules on the membrane surface P The following formula:
the offset-corrected quantization ratio is:
correcting the deviation by adjusting the CP value to the quantization ratio B CP The ratio of B/C is controlled between 0.8 and 1.
4. A reverse osmosis treatment method according to claim 3, wherein the osmotic pressure of a single solute solution is calculated by the following equation:
in the formula, a l Activity of solution, V l The molar volume of the solution, R is the rejection rate of the reverse osmosis membrane to the solution, and T is the liquid temperature;
when multiple solutes are present in the solution, the osmotic pressure is calculated using the formula:
in the formula, V i 、C i Respectively representing the volume and the molar concentration of the solute; a represents a permeability coefficient.
5. A reverse osmosis ultra-high pressure reverse osmosis treatment system for implementing the reverse osmosis treatment method of claims 1-4, comprising: the device comprises a pretreatment device, a microfiltration filter, a reverse osmosis device, a processor, a controller, a concentration tank and a pure water tank;
an air pump is connected between the microfiltration filter and the pretreatment device; an ultrahigh pressure pump is arranged between the microfiltration filter and the ultrahigh pressure reverse osmosis device; the inlets of the concentration tank and the pure water tank are respectively connected to the outlet of the reverse osmosis device; a suction pump is arranged between the concentration tank and the reverse osmosis device and is used for sucking the concentrated liquid to the concentration tank at an adjustable speed;
the processor is used for establishing a permeation model for analysis to obtain a deviation correction quantization ratio of the reverse osmosis device, calculating a pumping pressure and a suction rate to be adjusted, and feeding back the pumping pressure of the ultra-high pressure pump and the suction rate of the suction pump to be adjusted to the controller;
the controller adjusts the pumping pressure of the ultra-high pressure pump according to the feedback parameters to realize the control of the transmembrane pressure difference of the reverse osmosis device and adjusts the pumping rate of the pumping rate to realize the control of the transmembrane pressure difference of the reverse osmosis device.
6. The reverse osmosis treatment system of claim 5, wherein a reverse osmosis membrane is disposed within the reverse osmosis unit, and wherein the reverse osmosis membrane is a spiral wound reverse osmosis membrane or a hollow fiber reverse osmosis membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024169.1A CN115417472A (en) | 2022-08-24 | 2022-08-24 | Reverse osmosis ultrahigh-pressure reverse osmosis treatment system and treatment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024169.1A CN115417472A (en) | 2022-08-24 | 2022-08-24 | Reverse osmosis ultrahigh-pressure reverse osmosis treatment system and treatment method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115417472A true CN115417472A (en) | 2022-12-02 |
Family
ID=84198180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211024169.1A Pending CN115417472A (en) | 2022-08-24 | 2022-08-24 | Reverse osmosis ultrahigh-pressure reverse osmosis treatment system and treatment method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115417472A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117379978A (en) * | 2023-12-11 | 2024-01-12 | 河北建投水务投资有限公司 | Ultrafiltration membrane pool operation method and device, electronic equipment and readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001062255A (en) * | 1999-08-27 | 2001-03-13 | Toray Ind Inc | Reverse osmosis membrane plant and its production, operating method and memory medium for this purpose |
| JP2010063976A (en) * | 2008-09-09 | 2010-03-25 | Ebara Corp | Membrane separation apparatus and method of operating the same |
| CN207659150U (en) * | 2017-11-29 | 2018-07-27 | 三达膜科技（厦门）有限公司 | A kind of super-pressure counter-infiltration system |
| WO2019225308A1 (en) * | 2018-05-21 | 2019-11-28 | 栗田工業株式会社 | Reverse osmosis system diagnostic device |
-
2022
- 2022-08-24 CN CN202211024169.1A patent/CN115417472A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001062255A (en) * | 1999-08-27 | 2001-03-13 | Toray Ind Inc | Reverse osmosis membrane plant and its production, operating method and memory medium for this purpose |
| JP2010063976A (en) * | 2008-09-09 | 2010-03-25 | Ebara Corp | Membrane separation apparatus and method of operating the same |
| CN207659150U (en) * | 2017-11-29 | 2018-07-27 | 三达膜科技（厦门）有限公司 | A kind of super-pressure counter-infiltration system |
| WO2019225308A1 (en) * | 2018-05-21 | 2019-11-28 | 栗田工業株式会社 | Reverse osmosis system diagnostic device |
Non-Patent Citations (1)
| Title |
|---|
| 胡洪波等: "生物工程单元操作实验", vol. 1, 上海交通大学出版社, pages: 269 - 160 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117379978A (en) * | 2023-12-11 | 2024-01-12 | 河北建投水务投资有限公司 | Ultrafiltration membrane pool operation method and device, electronic equipment and readable storage medium |
| CN117379978B (en) * | 2023-12-11 | 2024-02-23 | 河北建投水务投资有限公司 | Ultrafiltration membrane pool operation method and device, electronic equipment and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Qin et al. | Dead-end ultrafiltration for pretreatment of RO in reclamation of municipal wastewater effluent | |
| Singh et al. | Introduction to membrane processes for water treatment | |
| KR102307286B1 (en) | Apparatus for treating concentrated water of reverse osmosis equipment | |
| US20150375174A1 (en) | Integrated ultrafiltration and reverse osmosis desalination systems | |
| Rahimpour et al. | Development of pilot scale nanofiltration system for yeast industry wastewater treatment | |
| Hawari et al. | Dilution of seawater using dewatered construction water in a hybrid forward osmosis system | |
| CN102603106A (en) | Composite system and method for treating industrial wastewater by membrane distillation | |
| CN110540318A (en) | Sewage recovery treatment system and treatment process | |
| CN115417472A (en) | Reverse osmosis ultrahigh-pressure reverse osmosis treatment system and treatment method thereof | |
| Lee et al. | Effect of different physical conditions on fouling control in in-situ chemical cleaning in place (CIP) for flat sheet membranes fouled by secondary effluents | |
| Ramirez et al. | Application of cross-flow microfiltration with rapid backpulsing to wastewater treatment | |
| JPWO2008096585A1 (en) | Filtration apparatus and water treatment method | |
| US20220234930A1 (en) | Method for Purifying Contaminated Water | |
| JP2009072766A (en) | Water treating method | |
| CN101070212A (en) | Ceramic-diaphragm sewater pretreating method | |
| CN209740898U (en) | Fastener surface treatment waste water's processing apparatus | |
| JPH0768259A (en) | Membrane filtering method of polluted water | |
| CN113603262A (en) | Wastewater near-zero discharge process of gas field flow field synergistic osmosis membrane | |
| WO2020181866A1 (en) | Device and process for processing wastewater generated in fastener surface treatment | |
| JPH0631270A (en) | Film cleaning process for water and operation of the device | |
| CN111410332A (en) | Method and device for treating silicon wafer processing wastewater | |
| WO2002012138A1 (en) | Installation and method for purifying waste water or effluents in particular industrial | |
| CN215102732U (en) | Diamond sewage treatment filtering reactor | |
| CN211770775U (en) | High concentration sewage concentration treatment system | |
| Khan et al. | Nanofiltration membranes for wastewater treatment and biotechnological applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |