CN214570917U - Novel microfiltration device for seawater desalination pretreatment - Google Patents
Novel microfiltration device for seawater desalination pretreatment Download PDFInfo
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- CN214570917U CN214570917U CN202022060168.5U CN202022060168U CN214570917U CN 214570917 U CN214570917 U CN 214570917U CN 202022060168 U CN202022060168 U CN 202022060168U CN 214570917 U CN214570917 U CN 214570917U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a novel microfiltration device for seawater desalination pretreatment. The device comprises a microfiltration membrane component, a frame, a water inlet, a water production port, a backwashing upper water discharge port, a backwashing lower water discharge port, a compressed air inlet, a cross-flow discharge port, a cleaning liquid inlet, a cleaning liquid backflow port, a water inlet pipe, a water production pipe, a backwashing water inlet pipe, a backwashing upper water discharge pipe, a backwashing lower water discharge pipe, an air inlet pipe, a cleaning water inlet pipe, a cleaning backflow pipe and a cross-flow discharge pipe, wherein the microfiltration membrane component comprises a filtration membrane element which is an external pressure type PTFE microfiltration membrane product; the microfiltration membrane modules are arranged in parallel, and 2 rows of microfiltration membrane modules are arranged in each 5 microfiltration membrane modules. Wherein the utility model has the advantages that: the high-performance PTFE membrane ensures the water quality of the filtered seawater, has pollution resistance, high strength and good high-concentration oxidant tolerance, the microfiltration device has reasonable structure, is not easy to pollute and block, has high pollutant interception capacity, is easy to clean, and can realize automatic gas and water backwashing and on-line dosing backwashing.
Description
Technical Field
The utility model relates to a microfiltration device for sea water desalination, in particular to a novel microfiltration device for sea water desalination pretreatment.
Background
Due to the increasing shortage of fresh water resources, the development of new fresh water resources becomes more important. The preparation of drinking water from seawater by using a seawater desalination technology is one of important ways for relieving the shortage of water resources in the modern times. At present, two methods are mainly adopted for desalinating seawater, namely a distillation method and a reverse osmosis method. Reverse osmosis is increasingly used for desalination of sea water due to its mature technology and low cost.
However, the water inflow has a significant influence on the operation effect of the reverse osmosis membrane, even the membrane life, and the seawater desalination pretreatment process becomes particularly important. The traditional seawater desalination pretreatment process generally comprises the following steps: sterilizing, flocculating settling, filtering, adding antiscaling agent, degassing, etc. The traditional pretreatment process comprises the steps of firstly carrying out chlorination sterilization on seawater, adding chemical agents (flocculating agents and the like) for flocculation, then removing flocculates through a multi-media filter, then continuously adding chemical agents (scale inhibitors and the like) for softening, and then filtering through a filter. Therefore, the method has the problems of complex operation, high cost (estimated to account for 30-40% of the total investment of equipment and 20-30% of the operating cost), large fluctuation of effluent quality, large occupied area, complex chemical agent management, long consumed time and the like.
Microfiltration, a pressure-driven membrane treatment technique, separates suspended matter, colloids, microorganisms, etc., and the pore size of a microfiltration membrane is generally 0.05 to 5 μm. The microfiltration adopted as the pretreatment has the advantages of simple operation, strong adaptability to water quality fluctuation, lower cost, small occupied area and the like. In addition, different membrane materials have different chemical stability and different requirements on feed water pretreatment. The common PVDF flat membrane or other hollow fiber membrane systems can continuously and stably operate at the sludge concentration of 5000mg/L, and the maximum sludge concentration is about 7000 mg/L-9000 mg/L, while the PTFE membrane can continuously and stably operate at the sludge concentration of more than 20000 mg/L-30000 mg/L, and the maximum sludge concentration can reach 40000 mg/L; PVDF flat membrane or other hollow fiber membranes are generally not resistant to oil, substances such as oil, organic solvents and the like cause fatal damage to the membranes, and the flux cannot be recovered, while PTFE membrane is resistant to oil and organic solvents, so that the risk resistance is higher; and the PTFE micro-filtration membrane has about 50 percent of water flux larger than that of a PVDF flat membrane or other hollow fiber membranes, the service life is about 10 years, and the occupied area can be saved by about 50 percent.
Therefore, the utility model develops a novel micro-filtration device for replacing the traditional seawater desalination pretreatment.
Disclosure of Invention
In order to solve the technical problem, the utility model discloses a novel micro-filtration device for sea water desalination and treatment, the technical scheme of the utility model is implemented like this:
a novel microfiltration device for seawater desalination pretreatment comprises a microfiltration membrane component, a filter membrane component cover plate, a frame, a water inlet, a water production port, a backwashing upper water discharge port, a backwashing lower water discharge port, a compressed air inlet, a cross-flow discharge port, a cleaning liquid inlet, a cleaning liquid backflow port, a water inlet pipe, a water production pipe, a backwashing water inlet pipe, a backwashing upper water discharge pipe, a backwashing lower water discharge pipe, an air inlet pipe, a cleaning water inlet pipe, a cleaning backflow pipe and a cross-flow discharge pipe; wherein
The water production pipe is respectively connected with the backwashing water inlet pipe and the cleaning backflow pipe, the backwashing upper water discharge pipe and the cross flow discharge pipe are connected, and the water inlet pipe is connected with the backwashing lower water discharge pipe and the cleaning water inlet pipe;
the microfiltration membrane component comprises a filtration membrane element, wherein the filtration membrane element is an external pressure type PTFE microfiltration membrane product; the microfiltration membrane modules are arranged in parallel, and 2 rows of microfiltration membrane modules are arranged in each 5 microfiltration membrane modules.
Preferably, the membrane component cover plate is further included; the filter membrane component cover plate and the micro-filter membrane component are made of UPVC.
Preferably, the device also comprises a water inlet electric valve, 2 turbidimeters, 3 pressure meters, 2 flow meters, an automatic exhaust valve, a thermometer, a residual chlorine meter and an upper cleaning reflux manual valve; one of the turbidimeters is arranged on the water inlet pipe, and the other turbidimeter is arranged on the water production pipe; 3 pressure gauges, one pressure gauge is arranged on the water inlet pipe, one pressure gauge is arranged on the water producing pipe, and the other pressure gauge is arranged at the compressed air inlet; one of them the flowmeter set up in the inlet tube, another set up in produce the water pipe.
Preferably, the backwashing water inlet pipe is provided with an automatic exhaust valve and a backwashing water inlet electric valve; and a backwashing upper-discharging electric valve is arranged on the backwashing upper-discharging pipe.
Preferably, a backwashing upper-discharging electric valve is arranged on the backwashing upper-discharging pipe; the backwashing lower drainage pipe is provided with a backwashing lower drainage electric valve.
Preferably, a cross-flow discharge electric valve and a cross-flow discharge manual valve are arranged on the cross-flow discharge pipe; a manual valve of a cleaning inlet is arranged on the cleaning water inlet pipe; the cleaning return pipe is provided with a lower cleaning return manual valve.
Preferably, the air conditioner further comprises a pressure transmitter and an air inlet electric valve.
By implementing the technical scheme of the utility model, the technical problem of traditional pretreatment in the prior art can be solved; implement the technical scheme of the utility model, through adopting the PTFE membrane, can realize solving traditional preliminary treatment technical problem, reduce area, reduce running cost, reduce the energy consumption, improved filtration system's automatic control level, improved the technical effect of the work efficiency of filter-pressing process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
FIG. 1 is a schematic view of the main structure of a novel microfiltration device for seawater desalination pretreatment;
FIG. 2 is a schematic structural anatomy diagram of a microfiltration device;
FIG. 3 is a schematic top view of the microfiltration device.
In the above drawings, the reference numerals denote:
1 backwashing water inlet
2 water producing port
3 cleaning liquid return port
4 cross-flow discharge port
5 cleaning liquid inlet
6 backwashing upper discharge port
7 backwashing lower discharge hole
8 water inlet
9 compressed air inlet
10 automatic exhaust valve
11 backwashing water inlet electric valve
12 upper cleaning backflow manual valve
Washing reflux hand valve under 13 deg.C
14 cross-flow discharge electric valve
15 cross-flow discharge manual valve
16 backwashing upward-discharging electric valve
17 backwashing lower-discharge electric valve
18-washing inlet manual valve
19 water inlet electric valve
20 air inlet electric valve
21 microfiltration membrane module
21-1 membrane element
22 membrane module cover
23 frame
24 turbidimeter
25 pressure gauge
26 flow meter
27 pressure transmitter
28 thermometer
29 residual chlorine meter
30 backwashing water inlet pipe
31 water producing pipe
32 cleaning return pipe
33 backwashing upper drainage pipe
34 backwashing drainage pipe
35 water inlet pipe
36 cross-flow discharge pipe
37 cleaning water inlet pipe
38 air inlet pipe
39 exhaust port
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Examples
In a specific embodiment, as shown in fig. 1, fig. 2 and fig. 3, a novel microfiltration device for seawater desalination and treatment comprises a microfiltration membrane module 21, a filtration membrane module cover plate 22, a frame 23, a water inlet 8, a water production port 2, a backwash upper drainage port 6, a backwash lower drainage port 7, a compressed air inlet 9, a cross-flow drainage port 4, a cleaning liquid inlet 5, a cleaning liquid reflux port 3, a water inlet pipe 35, a water production pipe 31, a backwash water inlet pipe 30, a backwash upper drainage pipe 33, a backwash lower drainage pipe 3, an air inlet pipe 38, a cleaning water inlet pipe 37, a cleaning reflux pipe 32 and a cross-flow drainage pipe 36; wherein
The water production pipe 31 is respectively connected with the backwashing water inlet pipe 30 and the cleaning return pipe 32, the backwashing upper water outlet pipe 33 and the cross flow discharge pipe 36, and the water inlet pipe 35 is connected with the backwashing lower water outlet pipe 3 and the cleaning water inlet pipe 37;
in this embodiment, the microfiltration device is installed on a frame 23, the microfiltration membrane modules 21 are vertical, the microfiltration membrane modules 21 are arranged in parallel, and 2 rows of microfiltration membrane modules 21 are arranged in 5 rows; each row of water inlet pipes 35 is provided with a water inlet 8, and the water production pipe 31 is provided with an exhaust port 39, a backwashing water inlet 1 and a water production port 2; the whole device is also provided with a backwashing upper water discharge port 6, a backwashing lower water discharge port 7, a water inlet 8, a compressed air inlet 9, a cross-flow discharge port 4, a cleaning liquid inlet 5 and a cleaning liquid return port 3; the water inlet pipe 35, the water production pipe 31, the backwashing water inlet pipe 30, the backwashing upper water outlet pipe 33, the backwashing lower water outlet pipe 34, the air inlet pipe 38, the cleaning water inlet pipe 37, the cleaning return pipe 32 and the cross flow water outlet pipe 36 are arranged in a matched manner.
The membrane element 21-1 is made of PTFE material, and one important characteristic of the PTFE material is that the PTFE material is good in non-caking property, so that almost all trapped matters can be discharged by backwashing, only a small part of trapped matters can be left on the surface of the element, and then air scrubbing and stirring are carried out to further remove pollutants; because the modified PTFE has good chemical stability, acid, alkali or sodium hypochlorite can be added to strengthen backwashing for removing, strong acid, alkali or strong oxidizer can be used for further removing adhesive substances, and the flux is recovered. Because the water treatment process does not add any medicament or only adds a small amount of bactericide, the cost is saved and the raw water is not polluted. The high-performance PTFE membrane ensures the water quality of the filtered seawater, has pollution resistance, high strength and good high-concentration oxidant tolerance, the microfiltration device has reasonable structure, is not easy to pollute and block, has high pollutant interception capacity, is easy to clean, and can realize automatic gas and water backwashing and on-line dosing backwashing.
In a preferred embodiment, a membrane assembly cover plate 22; the membrane module cover plate 22 and the micro-filtration membrane module 21 are made of UPVC.
In this embodiment, the microfiltration membrane module 21 is protected by the membrane module cover plate 22, the membrane element 21-1 in the microfiltration membrane module 21 is made of PTFE, the microfiltration membrane module 21 and the membrane module cover plate are made of UPVC, the specific gravity of the UPVC material is only 1/10 made of cast iron, the transportation and installation are simple, and the manufacturing cost of the device is reduced. The UPVC has excellent acid and alkali resistance, and general acid and alkali except the strong acid and alkali close to the saturation point can not corrode the UPVC. The UPVC material can not conduct electricity, is not electrolyzed, can resist current corrosion, and does not need secondary processing. The UPVC can not burn and support combustion, and has no fire-fighting worry. The installation is simple and easy, low cost: the cutting and the connection are simple, the practice of using PVC glue for connection proves that the cutting and the connection are reliable and safe, the operation is simple and convenient, and the cost is low. UPVC has excellent weather resistance and cannot be decomposed by bacteria and fungi. The inner wall is smooth, the fluid fluidity loss is small, dirt is not easy to attach to the smooth pipe wall, the maintenance is simple, and the maintenance cost is low.
In a preferred embodiment, the device further comprises a water inlet electric valve 19, 2 turbidimeters 24, 3 pressure meters 25, 2 flow meters 26, an automatic exhaust valve 10, a thermometer 28, a residual chlorine meter 29 and an upper cleaning return manual valve 12; one of the turbidimeters 24 is arranged on the water inlet pipe 35, and the other one is arranged on the water production pipe 31; 3 pressure gauges 25, one is set up in the inlet pipe 35, one is set up in producing the water pipe 31, another is set up in the compressed air inlet; one of the flow meters 26 is arranged in the water inlet pipe 35 and the other is arranged in the water production pipe 31.
In the present embodiment, the water inlet pipe 35 is provided with a water inlet electric valve 19, a turbidimeter 24, a pressure gauge 25 and a flowmeter 26; an automatic exhaust valve 10, a flowmeter 26, a turbidimeter 24, a pressure gauge 25, a thermometer 28, a residual chlorine gauge 29 and an upper cleaning reflux manual valve 12 are arranged on the water production pipe 31; the compressed air inlet is provided with a pressure gauge 25; a backwashing upper discharge electric valve 16 is arranged on the backwashing upper discharge pipe 33; the cross-flow discharge electric valve 14 and the cross-flow discharge manual valve 15 are arranged on the cross-flow discharge pipe 36; the backwashing lower drainage pipe 34 is provided with a backwashing lower drainage electric valve 17, the cleaning water inlet pipe 37 is provided with a cleaning inlet manual valve 18, and the cleaning return pipe 32 is provided with a lower cleaning return manual valve 13. The water production pipe 31 is respectively connected with the backwashing water inlet pipe 30 and the cleaning return pipe 32, the backwashing upper water outlet pipe 33 and the cross flow water outlet pipe 36, and the water inlet pipe 35 is connected with the backwashing lower water outlet pipe 34 and the cleaning water inlet pipe 37. Compared with the traditional process, the device can save 70% of occupied area.
In a preferred embodiment, the backwash water inlet pipe 30 is provided with an automatic air vent valve 10 and a backwash water inlet electric valve 11.
In the embodiment, an automatic exhaust valve 10 and a backwashing water inlet electric valve 11 are installed on a backwashing water inlet pipe 30, in the backwashing process, a backwashing upper-row electric valve 16 is firstly opened, a backwashing lower-row electric valve 17, a backwashing water inlet electric valve 11 and a gas inlet electric valve 20 are firstly opened, whether a backwashing water pump inlet and outlet door is in an opened state is checked, then a backwashing water pump is started, finally a backwashing water inlet manual valve is adjusted, the backwashing pressure value is less than 0.15MPa, the microfiltration device is backwashed, and the backwashing time is 60 s.
In a preferred embodiment, a backwashing upper-discharge electric valve 16 is arranged on the backwashing upper-discharge pipe 33; the backwashing lower drainage pipe 34 is provided with a backwashing lower drainage electric valve 17.
In the present embodiment, the backwash upper discharge pipe 33 and the backwash lower discharge pipe 34 are provided with a backwash upper discharge electric valve 16 and a backwash lower discharge electric valve 17, respectively, and the backwash upper discharge electric valve 16 and the backwash lower discharge electric valve 17 are composed of an electric actuator and a valve. The valve is simply controlled by an electric actuator, so that the valve is opened and closed. The electric actuator can be divided into an upper part and a lower part, wherein the upper part is the electric actuator, and the lower part is the valve. The electric valve uses electric energy as power to drive the valve through the electric actuating mechanism, so that the opening and closing of the valve are realized, and the aim of opening and closing the pipeline medium is fulfilled. The electric valve has larger action moment than that of the common valve, adjustable opening and closing action speed, simple structure and easy maintenance, and can be used for controlling the flow of various types of fluid such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like.
In a preferred embodiment, a cross-flow discharge electric valve 15 and a cross-flow discharge manual valve 14 are arranged on the cross-flow discharge pipe 36; a manual valve 18 of a cleaning inlet is arranged on the cleaning water inlet pipe 37; the lower cleaning return manual valve 13 is provided on the cleaning return pipe 32.
In the embodiment, the cross-flow discharge electric valve 15 and the cross-flow discharge manual valve 14 are installed on the cross-flow discharge pipe 36, and the operation control mode of the device is provided with a program start-stop device, so that the device can be automatically flushed in a delayed manner after being stopped. The operation and backwashing of the microfiltration system can be manually or automatically controlled, and the operation of the device is automatically controlled according to the water level of the microfiltration water tank. The starting, running, backwashing, stopping and other processes of the device can be automatically controlled. The device is provided with an online monitoring instrument for important parameters, and once some parameters exceed set values, the device gives an alarm. The device simplifies the process flow, can completely realize automatic control, and improves the automatic control level of the filtering system.
In a preferred embodiment, the air conditioner further comprises a pressure transmitter 27 and an air inlet electric valve 20, wherein the pressure transmitter 27 and the air inlet electric valve 20 are arranged on the air inlet pipe 38.
In the present embodiment, the pressure transmitter 27 and the intake motor-operated valve 20 are mounted on the intake pipe 38. The pressure transmitter 27 is capable of converting a pressure signal into an electrical signal, the pressure transmitter 27 is formed by a resistive element which is relatively sensitive to pressure, a component called a spacer is arranged inside the pressure transmitter 27, and the spacer and the filling liquid in the element are transmitted to both sides of the measuring diaphragm. The pressure transmitter is a capacitor formed by a measuring diaphragm and electrodes on insulating sheets on two sides. When the pressures on the two sides are not consistent, the measuring diaphragm is caused to displace, the displacement is in direct proportion to the pressure difference, so that the capacitances on the two sides are unequal, and the signals are converted into signals in direct proportion to the pressures through oscillation and demodulation links.
The water inlet filtering and water producing process of the device is as follows: firstly, opening the backwashing lower-row electric valve 17, closing the backwashing lower-row electric valve after 2 minutes, then opening the backwashing upper-row electric valve 16 and the water inlet electric valve 19 for pre-washing, then opening the water inlet electric valve 19, and adjusting the opening degree of the water inlet electric valve 19 to ensure that the water production flow reaches the required water amount of 9.5 t/h; and (3) opening the cross-flow discharge electric valve 14, synchronously adjusting the cross-flow discharge manual valve 15, adjusting the discharge amount to be 0.5t/h, finally opening the microfiltration water production valve, and closing the backwashing upper discharge electric valve 16 and the backwashing lower discharge electric valve 17.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the present invention, and that any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (7)
1. A novel micro-filtration device for seawater desalination pretreatment, which is characterized in that: the device comprises a microfiltration membrane component, a water inlet, a water production port, a backwashing upper water discharge port, a backwashing lower water discharge port, a compressed air inlet, a cross-flow discharge port, a cleaning liquid inlet, a cleaning liquid backflow port, a water inlet pipe, a water production pipe, a backwashing water inlet pipe, a backwashing upper water discharge pipe, a backwashing lower water discharge pipe, an air inlet pipe, a cleaning water inlet pipe, a cleaning backflow pipe and a cross-flow discharge pipe; wherein,
the water production pipe is respectively connected with the backwashing water inlet pipe and the cleaning return pipe, the backwashing upper water discharge pipe and the cross-flow discharge pipe are connected, and the water inlet pipe is connected with the backwashing lower water discharge pipe and the cleaning water inlet pipe.
2. The novel microfiltration device for seawater desalination pretreatment according to claim 1, wherein: the membrane component cover plate is also included; the membrane module cover plate and the microfiltration membrane module are made of UPVC.
3. The novel microfiltration device for seawater desalination pretreatment according to claim 2, wherein: the device also comprises a water inlet electric valve, 2 turbidimeters, 3 pressure meters, 2 flow meters, an automatic exhaust valve, a thermometer, a residual chlorine meter and an upper cleaning reflux hand valve; one of the turbidimeters is arranged on the water inlet pipe, and the other turbidimeter is arranged on the water production pipe; 3 pressure gauges, one pressure gauge is arranged on the water inlet pipe, one pressure gauge is arranged on the water producing pipe, and the other pressure gauge is arranged at the compressed air inlet; one of them the flowmeter set up in the inlet tube, another set up in produce the water pipe.
4. The novel microfiltration device for seawater desalination pretreatment according to claim 1, wherein: and the backwashing water inlet pipe is provided with an automatic exhaust valve and a backwashing water inlet electric valve.
5. The novel microfiltration device for seawater desalination pretreatment according to claim 4, wherein: a backwashing upper-discharging electric valve is arranged on the backwashing upper-discharging pipe; and a backwashing lower drainage valve is arranged on the backwashing lower drainage pipe.
6. The novel microfiltration device for seawater desalination pretreatment according to claim 5, wherein: a cross-flow discharge electric valve and a cross-flow discharge manual valve are arranged on the cross-flow discharge pipe; a manual valve of a cleaning inlet is arranged on the cleaning water inlet pipe; and a lower cleaning backflow manual valve is arranged on the cleaning backflow pipe.
7. The novel microfiltration device for seawater desalination pretreatment according to claim 1, wherein: still include pressure transmitter and the motorised valve that admits air, pressure transmitter with the motorised valve that admits air set up in the intake pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022060168.5U CN214570917U (en) | 2020-09-19 | 2020-09-19 | Novel microfiltration device for seawater desalination pretreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022060168.5U CN214570917U (en) | 2020-09-19 | 2020-09-19 | Novel microfiltration device for seawater desalination pretreatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214570917U true CN214570917U (en) | 2021-11-02 |
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| CN202022060168.5U Active CN214570917U (en) | 2020-09-19 | 2020-09-19 | Novel microfiltration device for seawater desalination pretreatment |
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