CN219002623U - Evaluation and test integrated device for ultrafiltration and reverse osmosis membrane components - Google Patents
Evaluation and test integrated device for ultrafiltration and reverse osmosis membrane components Download PDFInfo
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- CN219002623U CN219002623U CN202222126527.1U CN202222126527U CN219002623U CN 219002623 U CN219002623 U CN 219002623U CN 202222126527 U CN202222126527 U CN 202222126527U CN 219002623 U CN219002623 U CN 219002623U
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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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Abstract
The utility model discloses an ultrafiltration and reverse osmosis membrane assembly evaluation and test integrated device, which comprises a box body structure, wherein the integrated device is arranged in the box body structure; the box body structure is a single-side door opening structure, and an overhaul channel is arranged in the box body structure; the integrated device comprises a water inlet tank, a security filter, an ultrafiltration membrane system, a reverse osmosis membrane system, a cleaning device, a dosing system, a valve, an online instrument and an electric control system; the ultrafiltration membrane system is connected with an ultrafiltration water inlet tank, and the reverse osmosis membrane system is connected with a reverse osmosis water inlet tank; the ultrafiltration membrane system is connected with an ultrafiltration water inlet pump; the ultrafiltration membrane system, the reverse osmosis membrane system and the cleaning device are respectively connected with a security filter. And the dosing device is connected with the ultrafiltration water inlet tank. The integrated device is used for testing the performance of the membrane element in the whole process of the process, is beneficial to selecting ultrafiltration membranes and reverse osmosis membranes, and provides a suitable membrane element for the subsequent application of double-membrane method projects.
Description
Technical Field
The utility model relates to the field of reverse osmosis, in particular to an ultrafiltration and reverse osmosis membrane assembly evaluation and test integrated device.
Background
Along with the continuous development of the water treatment industry in China, the application of the membrane technology in the aspect of advanced treatment of water is rapidly developed. In the operation process of the membrane system, accurate judgment of membrane pollution is an important link for ensuring stable and efficient operation of the system. The membrane pollution directly affects the important test index of the water yield of the system. Meanwhile, the water yield can be changed due to the change of the running conditions such as the water supply temperature, the water supply pressure, the recovery rate, the water supply salt concentration and the like. The membrane element suppliers perform performance tests according to standard test conditions before shipping their products to demonstrate high performance and desalination rates of their products, but there is a more important fact that the large difference in actual system conditions from factory test conditions results in long-term operation performance of the membrane system under user conditions being more important than the manufacturer factory testing single element performance, because long-term stable operation of the membrane system is the most important factor affecting membrane system operation costs, operation management and maintenance. The device aims at the detection of the ultrafiltration membrane and the reverse osmosis membrane high-low pressure membrane elements, and provides a universal membrane element and double-membrane full-flow test device which can be applied to the actual system conditions of users.
The design and implementation of the ultrafiltration membrane and reverse osmosis membrane integrated test equipment can standardize the test method of the ultrafiltration membrane and the reverse osmosis membrane, and has important significance in improving the overall quality of the ultrafiltration membrane and the reverse osmosis membrane products and promoting the healthy development of the membrane products, so that the design of the integrated test equipment is important for the application of a double-membrane system.
Disclosure of Invention
Therefore, the utility model aims to solve the technical problem of providing a set of general integrated device capable of testing the performances of ultrafiltration membranes and reverse osmosis membrane components, which can simulate the on-site process flow test and evaluate the functions of the membrane components, namely, aiming at specific ultrafiltration membranes and reverse osmosis membrane products, the utility model realizes the test of the whole-flow double-membrane process applicable to the engineering project site, obtains the performance parameters and the process operation parameters, and has the continuous evaluation capability of long-term operation.
The technical scheme of the utility model is that the ultrafiltration and reverse osmosis membrane evaluation and test integrated device comprises a box structure, wherein the integrated device is arranged in the box structure; the box body structure is of a single-side door opening structure, and an overhaul channel is arranged in the box body;
the integrated device comprises a water inlet tank, a cartridge filter, an ultrafiltration membrane system, a reverse osmosis membrane system, a cleaning device, a dosing system, a valve, a necessary on-line instrument and an electric control system;
the ultrafiltration membrane system is connected with an ultrafiltration water inlet tank, and the reverse osmosis membrane system is connected with a reverse osmosis water inlet tank;
the ultrafiltration system is connected with an ultrafiltration water inlet pump;
the ultrafiltration membrane system, the reverse osmosis membrane system and the cleaning device are respectively connected with a security filter;
the integrated device ultrafiltration membrane system is provided with an ultrafiltration membrane element, and the ultrafiltration membrane element is respectively provided with a supporting layer and a film-coating filter layer;
the reverse osmosis membrane system comprises a membrane shell and a membrane element; the membrane elements are connected in series;
the cleaning device comprises a backwashing and chemical cleaning device; the backwashing device is connected with a backwashing pump and is configured with compressed air and clean water; the chemical cleaning device is connected with a chemical cleaning pump, and the chemical cleaning pump is connected with a cleaning water tank and a filter; the chemical cleaning pump is connected with the water outlet end of the ultrafiltration membrane system and the water inlet end of the reverse osmosis membrane system;
the dosing device is connected with the ultrafiltration water supply tank; the dosing device comprises a dosing box, a dosing pump and a stirrer.
The water inlet tank is used for collecting water into the water tank, the water inlet amount is controlled by the liquid level meter, and the water inlet tank are respectively linked with the water inlet pump. The integrated device ultrafiltration water inlet pump is used for leading raw water to enter an ultrafiltration system device through the pump, the water inlet pump is arranged on a water inlet pipe in front of a treatment device, a flange plate on an improved water pipe is connected with the pump, and a connecting piece comprises a matched screw and a gasket.
The installation position of the dosing device is the inlet and outlet of a cartridge filter or the inlet and outlet positions of a high-pressure pump, the volume of the dosing box is optional, the dosing pump is adjustable, and the dosing devices arranged in the dosing system are respectively provided with: the flocculant dosing device, the non-oxidizing bactericide, the scale inhibitor dosing device and the like are provided with a stirrer, and are used for stirring the solid medicament, and the required solubility is achieved through stirring clear water and the solid medicament in proportion.
In the ultrafiltration and reverse osmosis membrane evaluation and test integrated device, the electric control and operation system is arranged on the inlet side of the box body structure; each device and each system are arranged on two sides of the inside of the box body structure, and an overhaul channel is arranged in the middle.
In the ultrafiltration and reverse osmosis membrane evaluation and test integrated device, a blocking device is arranged between the electric control and operation system and other devices. A blocking device is reserved on the filter device and the like, so that splashing can be prevented, and an operating system is protected; such as a barrier.
In the ultrafiltration and reverse osmosis membrane evaluation and test integrated device, an ultrafiltration pneumatic valve is arranged in the ultrafiltration membrane system; the reverse osmosis membrane system is provided with a reverse osmosis pneumatic valve.
The ultrafiltration pneumatic valve is provided with a water inlet pneumatic valve, a cleaning water inlet pneumatic valve, a water inlet and exhaust pneumatic valve, a backwashing water inlet pneumatic valve, a concentrated water discharge pneumatic valve, a concentrated water chemical cleaning pneumatic valve, a produced water chemical cleaning pneumatic valve and a produced water outlet pneumatic valve respectively. A reverse osmosis pneumatic valve, comprising: the device comprises a water inlet pneumatic valve, a cleaning water inlet pneumatic valve, a water producing and discharging pneumatic valve, a water producing pneumatic valve, a concentrated water pneumatic valve and a concentrated water discharging pneumatic valve.
In the integrated device for evaluating and testing the ultrafiltration and reverse osmosis membranes, the online instrument comprises a high-low voltage switch, an online turbidity meter, an online pH meter, an online conductivity meter, an online pressure sensor and an online flowmeter. The on-line instrument has the function of providing control signal feedback for the system, and feeding back the control signal to the control terminal when the water inlet requirement of the system is not met, wherein the control terminal makes signal termination or feedback.
The electric control and operation system comprises: the PLC module, the electrical original device, the touch screen and the control cabinet are mainly used for controlling the start and stop of the device.
In the ultrafiltration and reverse osmosis membrane evaluation and test integrated device, the cartridge filter is vertically installed; the filter shell of the cartridge filter is side-in and side-out. The large flux filter core is matched in the water inlet security filter, and the aperture is 0.5-1.0um. The material is PP, the installation form is vertical, the filter shell is the side and goes out, the side goes out to show, the side is intake, the side goes out water, the filtration mode is dead end filtration, filter the filter core in through the cartridge filter, filter and get rid of impurity, for the high-quality raw water of next process supply, dispose on-line pressure differential meter on the cartridge filter, the effect of pressure differential meter, for judging the dirty stifled condition of filter core, judge whether the filter core is dirty stifled, judge according to the pressure that the pressure differential meter shows, it is dirty stifled to exceed 3 bars as the filter core, need in time change.
In the integrated device for evaluating and testing the ultrafiltration and the reverse osmosis membrane, the filtration mode of the membrane shell of the reverse osmosis membrane system is side-in side-out. The membrane shell comprises an end cover, a central tube and a thrust ring.
The beneficial effects are that:
the utility model relates to an integrated research of an ultrafiltration and reverse osmosis membrane component evaluation and test integrated device. The research equipment is used for testing the performance of the membrane element in the whole process of the process, is beneficial to selecting ultrafiltration membranes and reverse osmosis membranes, and provides a suitable membrane element for the subsequent application of double-membrane method projects. The integrated device is a new processing complete set of automatic equipment. The device is mainly applied to: (1) low-cost integrated process research; (2) research on application fields of ultrafiltration membranes and reverse osmosis membranes; (3) researching the performance and the long-acting performance of the ultrafiltration membrane and the reverse osmosis membrane; (4) researching a membrane performance change curve; and (5) researching membrane pollution, concentration polarization, prevention and recovery.
Drawings
FIG. 1 is a layout diagram of an ultrafiltration and reverse osmosis membrane module evaluation test integrated device.
Wherein, 1-the drug adding device; 2-ultrafiltering the water inlet tank; 3-chlorine gas adsorption device; 4-ultrafiltration water producing tank (i.e. reverse osmosis water inlet tank); 5-an ultrafiltration membrane system; 6-a cleaning device; 7-a reverse osmosis membrane system; 8-an electric control system; 9-a cartridge filter; 10-ultrafiltering a water inlet pump; 11-ultrafiltration backwash pump; 12-chemical cleaning pump.
FIG. 2 is a process flow of an integrated device for evaluating and testing ultrafiltration and reverse osmosis membrane components.
Detailed Description
Specific embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.
The ultrafiltration membrane and reverse osmosis membrane integrated membrane element testing device can realize that ultrafiltration membrane systems are respectively arranged in the equipment, and the reverse osmosis membrane systems are integrated integrally; the performance test of the ultrafiltration membrane and reverse osmosis membrane double-membrane process and the performance test of the ultrafiltration membrane and reverse osmosis membrane elements are satisfied.
After the device is installed on site as shown in fig. 1, an ultrafiltration and reverse osmosis membrane component suitable for the on-site treatment requirement is installed, and the components of a water supply tank, a security filter, an ultrafiltration membrane system, a reverse osmosis membrane system, a cleaning device, a dosing system, a valve, an instrument, an electric control system and the like are detected, so that the normal use state of the equipment is ensured;
the connecting device water inlet and outlet pipelines, when testing operation: it is generally checked whether all the pipes and meters of the device are tightly connected. Then, all the switches are fully turned on, the pretreatment equipment is started, and the water supply amount is adjusted.
The container can be used as the box body structure. The container size: the length, width and height are respectively as follows: 12192 x 2438 x 2896mm, the container is single sided open. The layout is as follows: the two sides are provided with the filtering equipment and the device, the middle is a manual overhaul channel, and the electric control and operating system is arranged at the inlet side and keeps a baffle with the filtering device to prevent splashing.
The integrated device consists of a water inlet tank, a security filter, an ultrafiltration membrane system, a reverse osmosis membrane system, a cleaning device, a dosing system, a valve, a meter, an electric control system and the like;
the water supply tank of the integrated device is provided with an ultrafiltration water inlet tank and a reverse osmosis water inlet tank respectively, water is concentrated into the water tank, the water inflow is controlled by a liquid level meter, and the water inlet tank and the reverse osmosis water inlet tank are respectively linked with a water inlet pump.
The integrated device ultrafiltration water inlet pump is used for leading raw water to enter an ultrafiltration system device through the pump, the water inlet pump is arranged on a water inlet pipe in front of a treatment device, a flange plate on an improved water pipe is connected with the pump, and a connecting piece comprises a matched screw and a gasket.
The integrated device cartridge filter comprises: the system water inlet security filter for ultrafiltration, reverse osmosis and chemical cleaning is internally matched with a large flux filter core, the aperture is 0.5-1.0um, the material is PP, the installation form is vertical, the filter shell is side inlet and side outlet, side water inlet and side water outlet are shown, the filtration mode is dead end filtration, impurities are removed through the filter core in the security filter, high-quality raw water is provided for the next process, an online differential pressure meter is arranged on the security filter, the differential pressure meter is used for judging the pollution and blockage condition of the filter core, whether the filter core is polluted and blocked or not is judged according to the pressure displayed by the differential pressure meter, the filter core is polluted and blocked when the pressure exceeds 3bar, and the filter core is required to be replaced in time.
The integrated device ultrafiltration membrane system comprises: the ultrafiltration membrane elements are respectively in two forms of 6 inches and 8 inches, and in general application, the ultrafiltration membrane elements mainly comprise 8 inches, and the ultrafiltration membranes respectively comprise: the three filtering forms of internal pressure, external pressure and dead end are that the length of a single membrane is generally more than 1100mm (the membrane can be customized according to different membrane manufacturers) and the area is generally more than 52m 2 The highest water filtering capacity of the single membrane is more than 2t/h, the membrane is thread-shaped, and is respectively provided with a supporting layer and a film-coating filter layer, and the film-coating filter layer is generally PVDF, PES, PP and other high polymer materials. The membrane element has the main function of filtering clean water.
The integrated device reverse osmosis system is composed of a membrane shell and a membrane element, wherein the membrane shell is in a 3-core package, (the membrane shell is respectively provided with 1, 2, 3, 4, 5, 6, 7, 8 cores and the like) for providing the membrane element for series connection, the membrane shell is made of glass fiber reinforced plastic, the pressure grades of the membrane shell are respectively provided with (300 PSI, 450PSI, 600PSI, 1000PSI and the like), the membrane shell is suitable according to the water quality condition, the membrane shell filtering mode is side-in side-out, and the membrane shell is matched with an end cover, a central tube, a thrust ring and the like. The membrane elements are respectively in 4040 and 8040 forms, the application is mainly 8040, the filtration flow channels of the reverse osmosis membrane 8040 are respectively in 28mil and 34mil, and the length of a single membrane is1016mm, a filtration area of 37-42m 2 The highest recovery rate of the single-branch membrane is 15%, the membrane is of a three-layer structure, the membrane is respectively provided with a bottom layer, the non-woven fabrics and the supporting layer are generally made of high polymer materials, and the filtering layer is generally made of polyamide or other high polymer materials. The membrane element has the main function of filtering clean water.
The integrated device cleaning device is provided with: backwash and chemical cleaning device. In the running process, the backwashing time is set according to the time, and the backwashing is mainly carried out by ultrafiltration water production, and the principle of backwashing is that clear water enters from the permeation side of an ultrafiltration membrane through a backwashing pump and is combined with an air source, so that the effect of air and water backwashing is achieved. The backwashing device is provided with compressed air and clean water. Chemical cleaning is carried out, and when the ultrafiltration membrane and the reverse osmosis membrane are polluted, the water yield and the retention rate can be achieved through cleaning by the medicament. The chemical cleaning pump is provided with a cleaning water tank and a filter. The chemical cleaning pump is connected with the inlet water and the outlet water of the ultrafiltration membrane system.
The integrated device dosing system, the supporting of dosing device has respectively, dosing tank, dosing pump, agitator, and mounted position is cartridge filter advances, export or high pressure pump advances, exit position department, and dosing tank volume is optional, has respectively (50L, 100L, 200L etc.) dosing pump to be adjustable, and the scope is 0-80L/H, and the dosing device who is equipped with in the dosing system has respectively: the flocculant dosing device, the non-oxidizing bactericide, the scale inhibitor dosing device and the like are provided with a stirrer, and are used for stirring the solid medicament, and the required solubility is achieved through stirring clear water and the solid medicament in proportion.
The integrated device valve and the ultrafiltration pneumatic valve are respectively provided with a water inlet pneumatic valve, a cleaning water inlet pneumatic valve, a water inlet and exhaust pneumatic valve, a backwashing water inlet pneumatic valve, a concentrated water exhaust pneumatic valve, a concentrated water inlet chemical cleaning pneumatic valve, a produced water inlet chemical cleaning pneumatic valve and a produced water outlet pneumatic valve. A reverse osmosis pneumatic valve, comprising: the device comprises a water inlet pneumatic valve, a cleaning water inlet pneumatic valve, a water producing and discharging pneumatic valve, a water producing pneumatic valve, a concentrated water pneumatic valve and a concentrated water discharging pneumatic valve.
The integrated device is an online instrument which is respectively provided with a high-low voltage switch, an online turbidity meter, an online pH meter, an online conductivity meter, an online pressure sensor and an online flowmeter. The on-line instrument has the function of providing control signal feedback for the system, and feeding back the control signal to the control terminal when the water inlet requirement of the system is not met, wherein the control terminal makes signal termination or feedback.
The integrated device electric control system is provided with: the PLC module, the electrical original device, the touch screen, the control cabinet and the like are formed, and the main functions are that the control device is started and stopped.
The ultrafiltration device operates in the following manner: the raw water tank enters a security filter through a water supply pump, the security filter generally selects a large-flow filter core, and enters an ultrafiltration membrane system, and the ultrafiltration membrane produced water enters the ultrafiltration water tank.
The reverse osmosis device operates in the following mode: the ultrafiltration water tank and the water inlet pump are used for feeding the ultrafiltration water tank and the water inlet pump into the cartridge filter, the cartridge filter adopts a large-flow filter core, the high-pressure pump is used for feeding the ultrafiltration water tank and the water inlet pump into the reverse osmosis first-stage membrane system, and the first-stage concentrated water is used for feeding the ultrafiltration water tank and the water inlet pump into the second-stage membrane system; the produced water enters a produced water tank, and the concentrated water is discharged into a concentrated water tank. In order to improve the recovery rate of the system, the redundant pressure of the first-stage concentrated water outlet directly enters the second-stage operation.
The integrated testing device passes the field operation post-process performance test, and comprises flux of an ultrafiltration membrane, pollution resistance, a chemical cleaning period and backwashing time; the flux, rejection, pollution resistance, chemical cleaning cycle, operation pressure drop, recovery rate and desalination rate of the single-branch membrane element and the like of the reverse osmosis membrane element are used for testing the membrane performance of ultrafiltration and reverse osmosis membrane on site under specific water quality conditions.
The integrated testing device tests the rejection rate of the ultrafiltration membrane produced water through a turbidity meter, and tests the desalination rate of the reverse osmosis produced water through a conductivity meter.
The working flow is as follows:
starting the low-pressure pump, slowly opening the total water inlet valve of the device, controlling the total water inlet pressure of the device to be less than 0.3Mpa, flushing for 30 minutes, and checking whether the high-pressure pipeline, the low-pressure pipeline and the instrument are normal.
Starting the high-pressure pump, and adjusting the water inlet valve and the concentrated water discharge valve. And adjusting a pressure control system of the high-pressure pump.
And detecting the water conductivity of the product, opening a product water outlet valve when the water conductivity meets the requirements, and closing a product water discharge valve.
After the device runs normally, the device is switched to an automatic state, and the device is automatically controlled to run by an on-line instrument and a PLC.
After the device operates normally, flux of an ultrafiltration membrane is observed and recorded, pressure drop is operated, a chemical cleaning period is shortened, and backwashing time is shortened; the flux, the retention rate, the chemical cleaning period, the operation pressure drop, the recovery rate and the desalination rate of the single-branch membrane element and other data of the reverse osmosis membrane element;
the device can be replaced by different ultrafiltration and reverse osmosis membrane groups, the test method is repeated, the test data can obtain a double-membrane process membrane performance change curve, and can also verify the application performance of ultrafiltration and reverse osmosis membranes, so that a basis is provided for membrane type selection under specific water quality conditions.
The embodiments of the present utility model are described above. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.
Claims (8)
1. The utility model provides an ultrafiltration, reverse osmosis membrane subassembly aassessment test integrated device, includes box structure, its characterized in that: the integrated device is arranged in the box body structure; the box body structure is of a single-side door opening structure, and an overhaul channel is arranged in the box body;
the integrated device comprises a water inlet tank, a security filter, an ultrafiltration membrane system, a reverse osmosis membrane system, a cleaning device, a dosing system, a valve, an online instrument and an electric control system;
the ultrafiltration membrane system is connected with an ultrafiltration water inlet tank, and the reverse osmosis membrane system is connected with a reverse osmosis water inlet tank;
the ultrafiltration membrane system is connected with an ultrafiltration water inlet pump;
the ultrafiltration membrane system, the reverse osmosis membrane system and the cleaning device are respectively connected with a security filter;
the integrated device ultrafiltration membrane system is provided with an ultrafiltration membrane element, and the ultrafiltration membrane element is respectively provided with a supporting layer and a film-coating filter layer;
the reverse osmosis membrane system comprises a membrane shell and a membrane element; the membrane elements are connected in series;
the cleaning device comprises a backwashing device and a chemical cleaning device; the backwashing device is connected with a backwashing pump and is configured with compressed air and clean water; the chemical cleaning device is connected with a chemical cleaning pump, and the chemical cleaning pump is connected with a cleaning water tank and a filter; the chemical cleaning pump is connected with the water outlet end of the ultrafiltration membrane system and the water inlet end of the reverse osmosis membrane system;
the dosing device is connected with the ultrafiltration water inlet tank; the dosing device comprises a dosing box, a dosing pump and a stirrer.
2. The integrated ultrafiltration and reverse osmosis membrane module evaluation and test device according to claim 1, wherein: the electronic control system is arranged on the door inlet side of the box body structure.
3. The integrated ultrafiltration and reverse osmosis membrane module evaluation and test device according to claim 1, wherein: each device and each system are arranged on two sides of the inside of the box body structure, and an overhaul channel is arranged in the middle.
4. The integrated ultrafiltration and reverse osmosis membrane module evaluation and test device according to claim 1, wherein: and a blocking device is arranged between the electric control system and other devices except the electric control system.
5. The integrated ultrafiltration and reverse osmosis membrane module evaluation and test device according to claim 1, wherein: the ultrafiltration membrane system is provided with an ultrafiltration pneumatic valve; the reverse osmosis membrane system is provided with a reverse osmosis pneumatic valve.
6. The integrated ultrafiltration and reverse osmosis membrane module evaluation and test device according to claim 1, wherein: the online instrument comprises a high-low voltage switch, an online turbidity meter, an online pH meter, an online conductivity meter, an online pressure sensor and an online flowmeter.
7. The integrated ultrafiltration and reverse osmosis membrane module evaluation and test device according to claim 1, wherein: the cartridge filter is vertically installed; the filter shell of the cartridge filter is side-in and side-out.
8. The integrated ultrafiltration and reverse osmosis membrane module evaluation and test device according to claim 1, wherein: the membrane shell filtering mode of the reverse osmosis membrane system is side-in and side-out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222126527.1U CN219002623U (en) | 2022-08-12 | 2022-08-12 | Evaluation and test integrated device for ultrafiltration and reverse osmosis membrane components |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222126527.1U CN219002623U (en) | 2022-08-12 | 2022-08-12 | Evaluation and test integrated device for ultrafiltration and reverse osmosis membrane components |
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| CN219002623U true CN219002623U (en) | 2023-05-12 |
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| CN202222126527.1U Active CN219002623U (en) | 2022-08-12 | 2022-08-12 | Evaluation and test integrated device for ultrafiltration and reverse osmosis membrane components |
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