CN211734028U - Reverse osmosis device with high recovery rate - Google Patents
Reverse osmosis device with high recovery rate Download PDFInfo
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- CN211734028U CN211734028U CN202020254701.9U CN202020254701U CN211734028U CN 211734028 U CN211734028 U CN 211734028U CN 202020254701 U CN202020254701 U CN 202020254701U CN 211734028 U CN211734028 U CN 211734028U
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Abstract
The invention provides a high-recovery reverse osmosis device which comprises a reverse osmosis membrane group A, a reverse osmosis membrane group B, a reverse osmosis membrane group C, a water inlet pipeline, a concentrated water pipeline, a water production pipeline, a pressurization pipeline, a first high-pressure pump and a second high-pressure pump; the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C are respectively provided with a first interface, a second interface and a third interface; the first high-pressure pump is communicated with the water inlet pipeline and used for pumping raw water into the water inlet pipeline, and the second high-pressure pump is communicated with the pressurization pipeline; and the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group are respectively communicated with the water production pipeline. The utility model discloses can effectual improvement reverse osmosis unit's the system rate of recovery to delay the scale deposit of membrane, be particularly suitable for in the reuse of reclaimed water, the application in the poor, hardness height of quality of water, water shortage area of intaking such as zero release.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection water treatment and specifically relates to a high rate of recovery reverse osmosis unit. The method is particularly suitable for being applied to regions with poor inlet water quality, high hardness and water shortage, such as reclaimed water recycling, zero discharge and the like.
Background
The principle of reverse osmosis is that under the action of the osmotic pressure higher than that of the solution, other substances are separated from water based on the fact that the substances cannot permeate a semipermeable membrane. The reverse osmosis membrane has a very small membrane pore size, and thus can effectively remove dissolved salts, colloids, microorganisms, organic substances, and the like in water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process, simple and convenient operation and the like. In recent years, the membrane technology is rapidly developed and widely applied to the fields of electric power, metallurgy, petroleum and petrochemical industry, medicine, food, municipal engineering, sewage recycling, seawater desalination and the like, and the demand of various engineering on the membrane technology and equipment thereof is rapidly increased. In addition, the high support and attention of the related national and government departments bring unprecedented opportunities for the development of the membrane industry. With the continuous embodiment of the advantages of the membrane technology in environmental protection, energy conservation and traditional industry substitution in China, the development of the membrane technology is also highly emphasized by various countries. China has become the third world-wide reverse osmosis membrane market second only in North America and Europe, and is the most potential market for global reverse osmosis membranes and the focus area for competition of international reverse osmosis membrane manufacturers.
The reverse osmosis principle is that dilute solution and concentrated solution with the same volume are respectively arranged at two sides of a container, the middle part of the container is blocked by a semipermeable membrane, a solvent in the dilute solution naturally penetrates through the semipermeable membrane and flows towards the concentrated solution side, the liquid level at the concentrated solution side is higher than the liquid level of the dilute solution by a certain height to form a pressure difference, and the osmotic equilibrium state is reached, and the pressure difference is osmotic pressure. If a pressure greater than the osmotic pressure is applied to the concentrate side, the solvent in the concentrate flows toward the dilute solution in a direction opposite to that of the original permeate, a process known as reverse osmosis.
The recovery rate of the reverse osmosis system refers to the total recovery rate of the reverse osmosis device in actual use, and the recovery rate refers to the ratio of the flow rate of the permeate water relative to the flow rate of the raw water. A system with 50% recovery, i.e. a concentration multiple of 2 times; the recovery rate is 75 percent, namely the concentration is 4 times; when the recovery rate is 80%, concentrating by 5 times; when the recovery rate reaches 90%, the concentration is equivalent to 10 times. Due to the existence of concentration polarization phenomenon in the membrane system, the salt content of the feed liquid on the surface of the membrane becomes higher. Therefore, the raw water is concentrated, and the membrane surface is contaminated faster than expected, and the recovery rate is generally set to about 50 to 80% in the brackish water desalination treatment. Factors such as the operating conditions of the system, the characteristic state of the raw water and the like can affect the determination of the recovery rate, and once the recovery rate is selected to be too high, the risk of scale formation and technical pollution can be faced.
Therefore, it is important to set the recovery rate appropriately according to actual conditions. Based on the water quality analysis data of raw water, the operating conditions are set by combining the quarterly variation range of the raw water and considering the design modes of reverse osmosis systems related to the recovery rate of pretreatment and produced water, the operating temperature and the like.
The higher the recovery rate of the system, the less the amount of water consumed, but the higher the recovery rate, the following problem occurs.
1. The salt rejection rate of the product water is reduced;
2. precipitation of slightly soluble salts may occur;
3. the osmotic pressure of the concentrate is too high and the water yield of the element is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high rate of recovery reverse osmosis unit can effectual improvement reverse osmosis unit's the system rate of recovery to delay the scale deposit of membrane.
The utility model provides a high recovery rate reverse osmosis device, which comprises a reverse osmosis membrane group A, a reverse osmosis membrane group B, a reverse osmosis membrane group C, a water inlet pipeline, a concentrated water pipeline, a water production pipeline, a pressurization pipeline, a first high-pressure pump and a second high-pressure pump; the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C are respectively provided with a first interface, a second interface and a third interface;
the first high-pressure pump is communicated with a water inlet pipeline and used for pumping raw water into the water inlet pipeline, the water inlet pipeline is respectively communicated with first interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group in a one-to-one correspondence mode through a first water inlet valve, a second water inlet valve and a third water inlet valve, and the concentrated water pipeline is respectively communicated with the first interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group in a one-to-one correspondence mode through a first water inlet switching valve, a second water inlet switching valve and a third water inlet switching valve;
the second high-pressure pump is communicated with the booster pipeline, the booster pipeline positioned at the water inlet end of the second high-pressure pump is respectively communicated with the second interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C in a one-to-one correspondence manner through a first concentrated water valve, a second concentrated water valve and a third concentrated water valve, and the booster pipeline positioned at the water outlet end of the second high-pressure pump is respectively communicated with the second interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C in a one-to-one correspondence manner through a first concentrated water switching valve, a second concentrated water switching valve and a third concentrated water switching valve;
and the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group are respectively communicated with the water production pipeline.
The beneficial effects of the utility model are embodied in:
the device can operate in the following three ways:
a1: the first water inlet valve, the second water inlet valve, the third water inlet switching valve, the first concentrated water switching valve, the second concentrated water switching valve and the third concentrated water valve are all opened, and the rest valves are all closed. Raw water is pumped into the first interfaces of the A reverse osmosis membrane group and the B reverse osmosis membrane group through the first high-pressure pump, intermediate water flowing out of the second interfaces of the A reverse osmosis membrane group and the B reverse osmosis membrane group is pumped into the second interface of the C reverse osmosis membrane group through the second high-pressure pump, and finally concentrated water is discharged through the first interface of the C reverse osmosis membrane group and water is produced through the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group.
A2: and the first water inlet valve, the third water inlet valve, the second water inlet switching valve, the first concentrated water switching valve, the third concentrated water switching valve and the second concentrated water valve are all opened, and the other valves are all closed. Raw water is pumped into the first interfaces of the A reverse osmosis membrane group and the C reverse osmosis membrane group through the first high-pressure pump, intermediate water flowing out of the second interfaces of the A reverse osmosis membrane group and the C reverse osmosis membrane group is pumped into the second interface of the B reverse osmosis membrane group through the second high-pressure pump, and finally concentrated water is discharged through the first interface of the B reverse osmosis membrane group and water is produced through the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group.
A3: and the second water inlet valve, the third water inlet valve, the first water inlet switching valve, the second concentrated water switching valve, the third concentrated water switching valve and the first concentrated water valve are all opened, and the rest valves are all closed. Raw water is pumped into the first interfaces of the reverse osmosis membrane group B and the reverse osmosis membrane group C through the first high-pressure pump, intermediate water flowing out of the second interfaces of the reverse osmosis membrane group B and the reverse osmosis membrane group C is pumped into the second interface of the reverse osmosis membrane group A through the second high-pressure pump, and finally concentrated water is discharged through the first interface of the reverse osmosis membrane group A and water is produced through the third interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C.
This equipment is through above three kinds of modes operation switching in turn, and the timing between the reverse osmosis membrane group is intake in turn and is makeed the core membrane element in the membrane shell can be by the uniform use, and it can effectually avoid similar traditional reverse osmosis to intake end microorganism or suspended solid to pollute seriously to and the high problem of terminal inorganic salt scale deposit risk, the utility model discloses well design flux is far more than conventional 75% rate of recovery.
Preferably, the pressurization pipeline at the water inlet end of the second high-pressure pump passes through the total water inlet switching valve, and the pressurization pipeline at the water outlet end of the second high-pressure pump passes through the total concentrated water switching valve.
Preferably, the discharge end of the concentrated water pipeline is provided with a concentrated water discharge valve.
Preferably, the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group respectively comprise membrane shells and core membrane elements arranged inside the membrane shells, and seven core membrane elements are arranged in each membrane shell.
Seven core membrane elements are arranged, so that the recovery rate can be improved to 80-90%, and the water inlet consumption is reduced. For a reclaimed water recycling or zero discharge system, the improvement of the reverse osmosis recovery rate at the front end is the great investment cost saving for subsequent concentration and evaporation equipment.
Preferably, the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group are provided with sampling devices.
Preferably, the water inlet pipeline, the concentrated water pipeline, the water production pipeline and the pressurization pipeline are all provided with online conductance, pressure and flow detection control instruments.
The online conductivity, pressure and flow detection control instrument is matched with full-automatic electrical equipment for use, so that real unattended operation is realized, and the automation of water treatment is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a flow chart illustrating the operation of the method A1 according to the present embodiment;
FIG. 3 is a flowchart illustrating the operation of A2 according to this embodiment;
fig. 4 is a flowchart of the operation of a3 mode in this embodiment.
In the drawing, a reverse osmosis membrane group a1, a reverse osmosis membrane group B2, a reverse osmosis membrane group C3, a water inlet pipeline 4, a concentrated water pipeline 5, a water production pipeline 6, a pressurization pipeline 7, a first high-pressure pump 8, a second high-pressure pump 9, a membrane shell 10, a core membrane element 11, a first interface 12, a second interface 13, a third interface 14, a first water inlet valve 15, a second water inlet valve 16, a third water inlet valve 17, a first water inlet switching valve 18, a second water inlet switching valve 19, a third water inlet switching valve 20, a first concentrated water valve 21, a second concentrated water valve 22, a third concentrated water valve 23, a first concentrated water switching valve 24, a second concentrated water switching valve 25, a third concentrated water switching valve 26, a total water inlet switching valve 27, a total concentrated water switching valve 28, and a concentrated water discharge valve 29.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
As shown in fig. 1, the present embodiment provides a high-recovery reverse osmosis apparatus, which includes an a reverse osmosis membrane module, a B reverse osmosis membrane module, a C reverse osmosis membrane module, a water inlet pipeline, a concentrated water pipeline, a water production pipeline, a pressure boosting pipeline, a first high-pressure pump, and a second high-pressure pump. The A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group respectively comprise membrane shells and core membrane elements arranged inside the membrane shells, and seven core membrane elements are arranged in each membrane shell. Seven core membrane elements are arranged, so that the recovery rate can be improved to 80-90%, and the water inlet consumption is reduced. For a reclaimed water recycling or zero discharge system, the improvement of the reverse osmosis recovery rate at the front end is the great investment cost saving for subsequent concentration and evaporation equipment.
The reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C are respectively provided with a first interface, a second interface and a third interface, and the specific connection relation of each pipeline in the equipment is as follows:
the first high-pressure pump is communicated with a water inlet pipeline and used for pumping raw water into the water inlet pipeline, the water inlet pipeline is communicated with first interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group in a one-to-one correspondence mode through a first water inlet valve, a second water inlet valve and a third water inlet valve respectively, and the concentrated water pipeline is communicated with the first interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group in a one-to-one correspondence mode through a first water inlet switching valve, a second water inlet switching valve and a third water inlet switching valve respectively. The second high-pressure pump is communicated with the booster pipeline, the booster pipeline positioned at the water inlet end of the second high-pressure pump is respectively communicated with the second interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C in a one-to-one correspondence mode through a first concentrated water valve, a second concentrated water valve and a third concentrated water valve, and the booster pipeline positioned at the water outlet end of the second high-pressure pump is respectively communicated with the second interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C in a one-to-one correspondence mode through a first concentrated water switching valve, a second concentrated water switching valve and a third concentrated water switching valve. And the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group are respectively communicated with the water production pipeline.
In addition, the water inlet pipeline, the concentrated water pipeline, the water production pipeline and the pressurizing pipeline are all provided with online conductance, pressure and flow detection control instruments (not shown in the figure). The online conductivity, pressure and flow detection control instrument is matched with full-automatic electrical equipment for use, so that real unattended operation is realized, and the automation of water treatment is greatly improved. The third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group are provided with sampling devices, so that the detection is convenient. And the pressurizing pipeline positioned at the water inlet end of the second high-pressure pump passes through the total water inlet switching valve, and the pressurizing pipeline positioned at the water outlet end of the second high-pressure pump passes through the total concentrated water switching valve. And a concentrated water discharge valve is arranged at the water discharge end of the concentrated water pipeline.
It is well known that the most influential factor in membrane system design is the potential pollution tendency of raw water, particles, colloids and salts in raw water cause different fouling and scaling tendencies of membrane elements, and the accumulation of the particles, colloids and salts on the surface of a reverse osmosis membrane is increased along with the gradual concentration of inlet water, the concentration of the fouling substances on the surface of the membrane is in direct proportion to the flux and the recovery rate of the membrane system, and the higher the flux is designed into the system, the more rapid fouling and the more frequent chemical cleaning measures are needed. On the contrary, the low flux system design, although capable of reducing the membrane fouling tendency, also increases the investment cost, and for practical engineering, the selection of a reasonable flux and the system recovery rate are the key points for ensuring the comprehensive cost of the equipment operation. Each valve in this equipment realizes the automatic switching in turn of A1, A2 and A3 three kinds of operational modes under system control, and the core membrane element of intaking in turn at regular time between the reverse osmosis membrane group makes in the membrane shell can be by even use, and it can effectually avoid similar traditional reverse osmosis to intake end microorganism or suspended solid to pollute seriously to and the problem that terminal inorganic salt scale deposit risk is high, the utility model discloses well design flux is far greater than conventional 75% rate of recovery.
The three modes operate as follows:
as shown in fig. 2, a 1: the first water inlet valve, the second water inlet valve, the third water inlet switching valve, the first concentrated water switching valve, the second concentrated water switching valve and the third concentrated water valve are all opened, and the rest valves are all closed. Raw water is pumped into the first interfaces of the A reverse osmosis membrane group and the B reverse osmosis membrane group through the first high-pressure pump, intermediate water flowing out of the second interfaces of the A reverse osmosis membrane group and the B reverse osmosis membrane group is pumped into the second interface of the C reverse osmosis membrane group through the second high-pressure pump, and finally concentrated water is discharged through the first interface of the C reverse osmosis membrane group and water is produced through the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group.
As shown in fig. 3, a 2: and the first water inlet valve, the third water inlet valve, the second water inlet switching valve, the first concentrated water switching valve, the third concentrated water switching valve and the second concentrated water valve are all opened, and the other valves are all closed. Raw water is pumped into the first interfaces of the A reverse osmosis membrane group and the C reverse osmosis membrane group through the first high-pressure pump, intermediate water flowing out of the second interfaces of the A reverse osmosis membrane group and the C reverse osmosis membrane group is pumped into the second interface of the B reverse osmosis membrane group through the second high-pressure pump, and finally concentrated water is discharged through the first interface of the B reverse osmosis membrane group and water is produced through the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group.
As shown in fig. 4, a 3: and the second water inlet valve, the third water inlet valve, the first water inlet switching valve, the second concentrated water switching valve, the third concentrated water switching valve and the first concentrated water valve are all opened, and the rest valves are all closed. Raw water is pumped into the first interfaces of the reverse osmosis membrane group B and the reverse osmosis membrane group C through the first high-pressure pump, intermediate water flowing out of the second interfaces of the reverse osmosis membrane group B and the reverse osmosis membrane group C is pumped into the second interface of the reverse osmosis membrane group A through the second high-pressure pump, and finally concentrated water is discharged through the first interface of the reverse osmosis membrane group A and water is produced through the third interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C.
In addition, the recovery rate of the reverse osmosis system refers to the total recovery rate of the reverse osmosis device in actual use, and the recovery rate refers to the ratio of the flow rate of the permeate water to the flow rate of the raw water. When the recovery rate reaches 90%, the concentration is equivalent to 10 times of that of raw water. Due to the existence of concentration polarization phenomenon in the membrane system, the salt content of the feed liquid on the surface of the membrane becomes higher. Therefore, the raw water is concentrated, and the membrane surface is contaminated faster than expected, and the recovery rate is generally set to about 50 to 80% in the brackish water desalination treatment. Factors such as the operating conditions of the system, the characteristic state of the raw water and the like can affect the determination of the recovery rate, and once the recovery rate is selected to be too high, the risk of scale formation and technical pollution can be faced. Reverse osmosis has set up one section and two-stage filtration in this embodiment to set up the second high-pressure pump in two-stage filtration, can increase the torrent condition on two-stage membrane surface, reduce because the membrane pollution problem that improves reverse osmosis unit rate of recovery and cause, make the device can still keep good running state under abominable water inlet condition.
In addition, the present embodiment provides a reverse osmosis membrane module a, a reverse osmosis membrane module B and a reverse osmosis membrane module C, but is not limited to three groups, and may be composed of a multiple of three, and the effects of the present embodiment can be achieved as long as the number of groups of reverse osmosis membrane modules into which raw water enters and the number of groups of reverse osmosis membrane modules into which reclaimed water enters are 2: 1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (6)
1. A high recovery reverse osmosis unit which characterized in that: the system comprises a reverse osmosis membrane group A, a reverse osmosis membrane group B, a reverse osmosis membrane group C, a water inlet pipeline, a concentrated water pipeline, a water production pipeline, a pressurization pipeline, a first high-pressure pump and a second high-pressure pump; the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C are respectively provided with a first interface, a second interface and a third interface;
the first high-pressure pump is communicated with a water inlet pipeline and used for pumping raw water into the water inlet pipeline, the water inlet pipeline is respectively communicated with first interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group in a one-to-one correspondence mode through a first water inlet valve, a second water inlet valve and a third water inlet valve, and the concentrated water pipeline is respectively communicated with the first interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group in a one-to-one correspondence mode through a first water inlet switching valve, a second water inlet switching valve and a third water inlet switching valve;
the second high-pressure pump is communicated with the booster pipeline, the booster pipeline positioned at the water inlet end of the second high-pressure pump is respectively communicated with the second interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C in a one-to-one correspondence manner through a first concentrated water valve, a second concentrated water valve and a third concentrated water valve, and the booster pipeline positioned at the water outlet end of the second high-pressure pump is respectively communicated with the second interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C in a one-to-one correspondence manner through a first concentrated water switching valve, a second concentrated water switching valve and a third concentrated water switching valve;
and the third interfaces of the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group are respectively communicated with the water production pipeline.
2. A high recovery reverse osmosis unit according to claim 1, wherein: and the pressurizing pipeline positioned at the water inlet end of the second high-pressure pump passes through the total water inlet switching valve, and the pressurizing pipeline positioned at the water outlet end of the second high-pressure pump passes through the total concentrated water switching valve.
3. A high recovery reverse osmosis unit according to claim 1, wherein: and a concentrated water discharge valve is arranged at the water discharge end of the concentrated water pipeline.
4. A high recovery reverse osmosis unit according to claim 1, wherein: the A reverse osmosis membrane group, the B reverse osmosis membrane group and the C reverse osmosis membrane group respectively comprise membrane shells and core membrane elements arranged inside the membrane shells, and seven core membrane elements are arranged in each membrane shell.
5. The high recovery reverse osmosis unit of claim 4, wherein: and the third interfaces of the reverse osmosis membrane group A, the reverse osmosis membrane group B and the reverse osmosis membrane group C are provided with sampling devices.
6. A high recovery reverse osmosis unit according to claim 1, wherein: the water inlet pipeline, the concentrated water pipeline, the water production pipeline and the pressurization pipeline are all provided with online conductance, pressure and flow detection control instruments.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108608A (en) * | 2022-06-17 | 2022-09-27 | 江苏京源环保股份有限公司 | Circulating reverse osmosis treatment system and treatment method thereof |
| CN115253709A (en) * | 2021-04-30 | 2022-11-01 | 天津膜天膜科技股份有限公司 | High-recovery-rate operation system for hollow fiber nanofiltration membrane |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253709A (en) * | 2021-04-30 | 2022-11-01 | 天津膜天膜科技股份有限公司 | High-recovery-rate operation system for hollow fiber nanofiltration membrane |
| CN115108608A (en) * | 2022-06-17 | 2022-09-27 | 江苏京源环保股份有限公司 | Circulating reverse osmosis treatment system and treatment method thereof |
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