Device for testing scale inhibition performance of reverse osmosis membrane
By designing a reverse osmosis membrane scale resistance performance test device, using the temperature and pressure of the concentrate to perform impact testing on the reverse osmosis membrane, and adding scale inhibitors to the reverse osmosis barrier to screen out appropriate scale inhibitors and reverse osmosis membrane pore sizes, solving the problem of shortening the service life of the reverse osmosis membrane in the prior art, and achieving effective scale inhibition and membrane life extension.
Patent Information
- Application Number
- CN202520517037.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2035-03-24
AI Technical Summary
The prior art is difficult to effectively screen out suitable types of scale inhibitors and dosages, resulting in a shortening of the service life of the reverse osmosis membrane and it is difficult to screen out reverse osmosis membranes with suitable pore sizes.
A reverse osmosis membrane scale resistance performance testing device was designed, including a concentration tank, a heat exchange sleeve, a reverse osmosis scale resistor and a liquid production storage tank. By adjusting the temperature and pressure of the concentrate, the reverse osmosis membrane is subjected to impact testing, and a scale inhibitor is added to the reverse osmosis scale resistor to detect the properties of the permeate and reverse osmosis membrane, and appropriate scale inhibitors and reverse osmosis membrane pore sizes are screened out.
Effective testing of the scale resistance performance of reverse osmosis membrane was achieved, and appropriate scale inhibitors, dosage and pore size of reverse osmosis membrane were screened out, which extended the service life of reverse osmosis membrane and improved the scale resistance effect.
Smart Images
Figure CN222838055U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of testing devices, and in particular relates to a reverse osmosis membrane scale inhibition performance testing device. Background Art
[0002] Reverse osmosis technology is a commonly used technical means for industrial water treatment. Industrial water contains minerals such as calcium and magnesium, which will affect the utilization of water and will be deposited on the surface of the reverse osmosis membrane during filtration, causing the performance of the reverse osmosis membrane to weaken and affecting the treatment effect. In order to reduce the deposition on the surface of the reverse osmosis membrane, scale inhibitors are often added.
[0003] Reverse osmosis membranes can effectively remove total dissolved solids, heavy metals, organic compounds, bacteria and viruses in water. Due to the high cost of reverse osmosis membranes, the selected reverse osmosis membranes must have excellent performance and be able to be used stably for a long time. The performance and dosage of antiscalants are directly related to the service life of reverse osmosis membranes. It is very important to use antiscalants reasonably, both to ensure their effectiveness and to avoid the negative effects caused by excessive use. Therefore, it is urgent to develop a reverse osmosis membrane antiscaling performance test device to screen out the appropriate type of antiscalants and the appropriate dosage to extend the service life of reverse osmosis membranes. Utility Model Content
[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide a reverse osmosis membrane scale inhibition performance testing device, which can screen out suitable types of scale inhibitors and dosages and reverse osmosis membranes with suitable pore sizes, extend the service life of the reverse osmosis membrane, and achieve effective scale inhibition.
[0005] The technical solution adopted by the utility model to solve its technical problems is:
[0006] The utility model discloses a reverse osmosis membrane scale inhibition performance testing device, comprising a concentration tank, a heat exchange jacket is arranged outside the concentration tank, a scale inhibitor inlet one is arranged on the top of the concentration tank, a reverse osmosis scale inhibitor is connected to the bottom of the concentration tank through a pipeline via a feed pump, a flow control valve and a pressure gauge are arranged in sequence between the feed pump and the reverse osmosis scale inhibitor, a reverse osmosis membrane is arranged inside the reverse osmosis scale inhibitor, a scale inhibitor inlet two is opened on the top of the reverse osmosis scale inhibitor, the reverse osmosis scale inhibitor is connected to a liquid production tank through a pipeline, and a flow meter and a sampling port are arranged in sequence between the reverse osmosis scale inhibitor and the liquid production tank.
[0007] in:
[0008] The upper part of the heat exchange jacket is provided with a circulating water inlet, and the lower part of the heat exchange jacket is provided with a circulating water outlet.
[0009] The top of the concentration tank is provided with a liquid inlet.
[0010] A screen is movably arranged inside the concentration tank.
[0011] The mesh size of the sieve is 0.5-2 mm.
[0012] A temperature display is arranged on the upper part of the concentration tank.
[0013] The top of the reverse osmosis scale inhibitor is provided with a hot water circulation inlet, and the bottom is provided with a hot water circulation outlet.
[0014] The reverse osmosis scale inhibitor is provided with a plurality of reverse osmosis membrane channels for accommodating reverse osmosis membranes.
[0015] The plurality of reverse osmosis membrane channels accommodating the reverse osmosis membranes are evenly arranged inside the reverse osmosis scale inhibitor.
[0016] The bottom of the liquid production storage tank is provided with a liquid production port.
[0017] The beneficial effects of the utility model are:
[0018] The concentration tank of the utility model can concentrate liquid to obtain concentrated liquid. If the osmosis effect of the reverse osmosis membrane remains stable after the concentrated liquid is treated with the reverse osmosis membrane for a period of time, the use effect of the reverse osmosis membrane in daily production can be guaranteed; the reverse osmosis membrane is impacted by changing the temperature and pressure of the concentrated liquid, and the surface condition of the reverse osmosis membrane is observed; then the reverse osmosis membrane performance is tested by adding a scale inhibitor to the concentrated liquid according to the same operation, and the surface condition of the reverse osmosis membrane is observed; then the performance of the reverse osmosis membrane is tested when the scale inhibitor is added to the reverse osmosis scale inhibitor, and the finally obtained permeate and reverse osmosis membrane are tested, so as to screen out suitable types of scale inhibitors and suitable dosages; reverse osmosis membranes of different specifications can be placed in the reverse osmosis membrane scale inhibitor to screen out reverse osmosis membranes with suitable pore sizes. If the pore size of the reverse osmosis membrane is too large, the scale inhibition will not be thorough, and if it is too small, the descaling efficiency and water flux will be affected. The utility model can be used for reverse osmosis scale inhibition performance testing of various reverse osmosis membranes. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the utility model;
[0020] Figure 2 It is a cross-sectional schematic diagram of the utility model reverse osmosis scale inhibitor.
[0021] In the figure: 1. Concentration tank; 2. Temperature display; 3. Feed pump; 4. Flow control valve; 5. Pressure gauge; 6. Reverse osmosis scale inhibitor; 7. Flow meter; 8. Liquid storage tank; 9. Sampling port;
[0022] 101, heat exchange jacket; 102, screen; 103, liquid inlet; 104, antiscalant inlet 1; 601, antiscalant inlet 2; 602, reverse osmosis membrane channel; 801, liquid production port. DETAILED DESCRIPTION
[0023] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.
[0024] Example 1
[0025] like Figure 1-2 As shown, the reverse osmosis membrane scale inhibition performance test device described in the utility model comprises a concentration tank 1, a heat exchange jacket 101 is arranged outside the concentration tank 1, a scale inhibitor inlet 104 is arranged on the top of the concentration tank 1, a reverse osmosis scale inhibitor 6 is connected to the bottom of the concentration tank 1 through a pipeline via a feed pump 3, a flow control valve 4 and a pressure gauge 5 are arranged in sequence between the feed pump 3 and the reverse osmosis scale inhibitor 6, a reverse osmosis membrane is arranged inside the reverse osmosis scale inhibitor 6, a scale inhibitor inlet 2 601 is opened on the top of the reverse osmosis scale inhibitor 6, the reverse osmosis scale inhibitor 6 is connected to a liquid production tank 8 through a pipeline, and a flow meter 7 and a sampling port 9 are arranged in sequence between the reverse osmosis scale inhibitor 6 and the liquid production tank 8.
[0026] A circulating water inlet is disposed at the upper portion of the heat exchange jacket 101 , and a circulating water outlet is disposed at the lower portion of the heat exchange jacket 101 .
[0027] A liquid inlet 103 is provided at the top of the concentration tank 1 .
[0028] A screen 102 is movably provided inside the concentration tank 1 .
[0029] The mesh size of the screen 102 is 0.5-2 mm.
[0030] A temperature display 2 is provided on the upper part of the concentration tank 1, which can detect the internal temperature of the concentration tank 1 in time and adjust the temperature of the concentrated liquid.
[0031] The top of the reverse osmosis scale inhibitor 6 is provided with a hot water circulation inlet, and the bottom is provided with a hot water circulation outlet.
[0032] A plurality of reverse osmosis membrane channels 602 for accommodating reverse osmosis membranes are arranged inside the reverse osmosis scale inhibitor 6. The plurality of reverse osmosis membrane channels 602 can test a plurality of reverse osmosis membranes at the same time, thereby improving the test efficiency.
[0033] A plurality of reverse osmosis membrane channels 602 for accommodating reverse osmosis membranes are evenly spaced and arranged inside the reverse osmosis antiscalant 6 .
[0034] A liquid production port 801 is provided at the bottom of the liquid production storage tank 8 .
[0035] Working principle and process:
[0036] During the test, multiple groups of different experiments can be conducted to test the scale inhibition performance of the reverse osmosis membrane;
[0037] The performance of the reverse osmosis membrane to be tested is tested using the concentrated liquid, the reverse osmosis membrane to be tested is placed in the reverse osmosis scale inhibitor 6, and the screen 102 is placed in the concentration tank 1, the concentrated liquid is transported to the reverse osmosis scale inhibitor 6 by appropriately adjusting the pressure and flow rate through the feed pump 3 and the flow control valve 4, the temperature of the reverse osmosis scale inhibitor 6 is regulated, and the nanofiltration liquid is detected through the sampling port 9 after a period of nanofiltration, and the data of the flow meter 7 is observed, the reverse osmosis scale inhibitor 6 after nanofiltration is taken out and compared with that before nanofiltration, and the property changes of the reverse osmosis membrane are recorded;
[0038] Add antiscalant to the concentrated liquid, then test the performance of the reverse osmosis membrane to be tested, adjust different pressure and flow rates to pump out the concentrated liquid, and test the properties of the liquid and reverse osmosis membrane after nanofiltration for a period of time;
[0039] After adding antiscalant to the concentrated liquid and heating it, the performance of the reverse osmosis membrane to be tested is tested, and the concentrated liquid is pumped out at different pressure and flow rates. After a period of nanofiltration, the properties of the liquid after nanofiltration and the reverse osmosis membrane are tested;
[0040] After the concentrated liquid is heated and the scale inhibitor is added to the reverse osmosis scale inhibitor 6, the performance of the reverse osmosis membrane to be tested is tested, and the concentrated liquid is pumped out at different pressure and flow rates. After a period of nanofiltration, the properties of the liquid after nanofiltration and the reverse osmosis membrane are tested;
[0041] After the concentrated liquid is heated and the scale inhibitor is added to the reverse osmosis scale inhibitor 6, reverse osmosis membranes of different specifications are placed in the reverse osmosis membrane scale inhibitor to screen out the reverse osmosis membrane with a suitable pore size;
[0042] After conducting several groups of experiments, we obtained the antiscaling performance data of different reverse osmosis membranes, and screened out the appropriate type of antiscalant, appropriate dosage and appropriate pore size of the reverse osmosis membrane, which will help improve the use efficiency of the reverse osmosis membrane and extend its service life.
Claims
1. A reverse osmosis membrane scale inhibition performance testing device, comprising a concentration tank (1), characterized in that: A heat exchange jacket (101) is arranged outside the concentration tank (1), a first scale inhibitor inlet (104) is arranged on the top of the concentration tank (1), a reverse osmosis scale inhibitor (6) is connected to the bottom of the concentration tank (1) through a pipeline via a feed pump (3), a flow control valve (4) and a pressure gauge (5) are arranged in sequence between the feed pump (3) and the reverse osmosis scale inhibitor (6), a reverse osmosis membrane is arranged inside the reverse osmosis scale inhibitor (6), a second scale inhibitor inlet (601) is opened on the top of the reverse osmosis scale inhibitor (6), the reverse osmosis scale inhibitor (6) is connected to a production liquid storage tank (8) through a pipeline, and a flow meter (7) and a sampling port (9) are arranged in sequence between the reverse osmosis scale inhibitor (6) and the production liquid storage tank (8).
2. The reverse osmosis membrane scale inhibition performance testing device according to claim 1, characterized in that: A circulating water inlet is provided at the upper portion of the heat exchange jacket (101), and a circulating water outlet is provided at the lower portion of the heat exchange jacket (101).
3. The reverse osmosis membrane scale inhibition performance testing device according to claim 1, characterized in that: A liquid inlet (103) is provided at the top of the concentration tank (1).
4. The reverse osmosis membrane scale inhibition performance testing device according to claim 1, characterized in that: A screen (102) is movably provided inside the concentration tank (1).
5. The reverse osmosis membrane scale inhibition performance testing device according to claim 4, characterized in that: The mesh size of the sieve (102) is 0.5-2 mm.
6. The reverse osmosis membrane scale inhibition performance testing device according to claim 1, characterized in that: A temperature display (2) is provided on the upper portion of the concentration tank (1).
7. The reverse osmosis membrane scale inhibition performance testing device according to claim 1, characterized in that: The reverse osmosis scale inhibitor (6) is provided with a hot water circulation inlet at the top and a hot water circulation outlet at the bottom.
8. The reverse osmosis membrane scale inhibition performance testing device according to claim 1, characterized in that: A plurality of reverse osmosis membrane channels (602) for accommodating reverse osmosis membranes are arranged inside the reverse osmosis scale inhibitor (6).
9. The reverse osmosis membrane scale inhibition performance testing device according to claim 8, characterized in that: A plurality of reverse osmosis membrane channels (602) accommodating reverse osmosis membranes are evenly spaced and arranged inside the reverse osmosis antiscalant (6).
10. The reverse osmosis membrane scale inhibition performance testing device according to claim 1, characterized in that: A liquid production port (801) is provided at the bottom of the liquid production storage tank (8).