CN217092941U - Dynamic evaluation device for performance of calcium sulfate cleaning agent of reverse osmosis membrane - Google Patents
Dynamic evaluation device for performance of calcium sulfate cleaning agent of reverse osmosis membrane Download PDFInfo
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- CN217092941U CN217092941U CN202121430211.0U CN202121430211U CN217092941U CN 217092941 U CN217092941 U CN 217092941U CN 202121430211 U CN202121430211 U CN 202121430211U CN 217092941 U CN217092941 U CN 217092941U
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Abstract
The utility model discloses a reverse osmosis membrane calcium sulfate cleaner performance developments evaluation device, include: the device comprises a test water tank, a heat exchanger, a high-pressure pump, a cartridge filter, a reverse osmosis membrane assembly, a pressure gauge, a flowmeter, a pipeline valve, a thermometer and a conductivity meter; the reverse osmosis membrane component is provided with a water inlet, a concentrated water port and a water production port, the water inlet is communicated with the test water tank through a first pipeline, the concentrated water port is communicated with the test water tank through a second pipeline, a fourth pipeline is further arranged between the first flowmeter and the first pressure gauge, and the water production port is further connected with a third pipeline. The utility model relates to a reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device furthest reduction reverse osmosis membrane operating condition carries out comprehensive dynamic evaluation to calcium sulfate cleaner performance under this condition, has greatly improved the accuracy of reverse osmosis membrane calcium sulfate cleaner performance evaluation, provides effectual hardware supporting platform for the technical research and development and the industrial usefulness in reverse osmosis water treatment medicament field.
Description
Technical Field
The utility model relates to a reverse osmosis water treatment technical field mainly relates to a reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device.
Background
Reverse osmosis is a new membrane separation technology developed in the 60's of the 20 th century and is a process of separating a solvent from a solute in a solution under pressure by means of a reverse osmosis membrane. Compared with the traditional water treatment technology, the method has the advantages of high treatment efficiency, low chemical reagent addition, capability of realizing seawater desalination, wastewater recycling and the like, and gradually becomes a new technology for solving the problems of energy, resources, environment and the like.
In the operation process of the reverse osmosis membrane, particulate matters, colloids, organic matter macromolecules, inorganic ions, microorganisms and the like in water have physical, chemical or mechanical effects with the reverse osmosis membrane, so that the substances are adsorbed, deposited, blocked and the like on the surface of the reverse osmosis membrane to form a membrane pollution phenomenon, and the membrane performance is further reduced, the separation efficiency is reduced, and even the service life of the membrane is influenced. Calcium sulfate scale is one of common inorganic salt precipitates, is difficult to remove and can cause irreversible pollution to a reverse osmosis membrane, so that the water yield of a system is abnormal, the salt rejection rate is reduced, and the effluent quality and the service life of a reverse osmosis membrane component are seriously influenced. For the calcium sulfate scaling problem of the reverse osmosis membrane, factors such as time efficiency, cost, practical application of field engineering and the like are comprehensively considered, and the regular cleaning by adopting a special cleaning agent is still a necessary means.
The performance of the cleaning agent can be statically evaluated by adopting a laboratory dissolution experiment aiming at the calcium sulfate scale, the method can transversely compare the performance of the calcium sulfate scale dissolved by different cleaning agents to a certain extent, and the difference between the performance of the cleaning agent and the actual operation working condition of a reverse osmosis membrane is still certain. In addition, the static method can only evaluate the dissolving performance of the cleaning agent on calcium sulfate, but cannot evaluate the influence of the cleaning agent on the performance of the reverse osmosis membrane (such as membrane flux, salt rejection rate and the like). At present, no public report exists on a dynamic evaluation method for the performance of the calcium sulfate cleaning agent of the reverse osmosis membrane, so that efficient and accurate screening and application of the calcium sulfate cleaning agent are difficult.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device is in order to solve among the prior art to the dynamic evaluation method of reverse osmosis membrane calcium sulfate cleaner performance not yet see there is the public report to make high efficiency, accurate screening and the application of calcium sulfate cleaner become the technical problem of difficulty.
A reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device includes: the device comprises a test water tank, a heat exchanger, a high-pressure pump, a cartridge filter, a reverse osmosis membrane assembly, a pressure gauge, a flowmeter, a pipeline valve, a thermometer and a conductivity meter;
the heat exchanger is arranged in the test water tank, the thermometer is arranged on the test water tank, the test water tank is also provided with a first conductivity meter, the reverse osmosis membrane component is provided with a water inlet, a concentrated water port and a water production port, the water inlet is communicated with the test water tank through a first pipeline, the concentrated water port is communicated with the test water tank through a second pipeline, a first pipeline valve, a high-pressure pump, a first flowmeter, a security filter, a fourth pipeline valve and a first pressure gauge are sequentially arranged on the first pipeline along the direction from the test water tank to the reverse osmosis membrane component, a fourth pipeline is further arranged between the first flowmeter and the first pressure gauge, a second pipeline valve is arranged on the fourth pipeline, a second pressure gauge and a third pipeline valve are sequentially arranged on the second pipeline along the direction from the reverse osmosis membrane component to the test water tank, the water production port is also connected with a third pipeline, and a second flowmeter and a second conductivity meter are sequentially arranged on the third pipeline.
Preferably, the material of the test water tank is plastic.
Preferably, the heat exchanger is made of a seawater corrosion resistant metal material.
Preferably, the heat exchanger is provided with a spiral pipeline which comprises a water inlet end and a water outlet end.
Preferably, the high-pressure pump is provided as a plunger-type high-pressure pump or a centrifugal-type high-pressure pump.
Preferably, the cartridge filter includes a housing and a filter element installed inside the housing, and the housing is made of a seawater corrosion resistant material.
Preferably, the filter precision of the filter element is set to be 50-100 μm.
Preferably, the reverse osmosis membrane module comprises a reverse osmosis membrane and a membrane support body.
The utility model relates to a reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device furthest reduction reverse osmosis membrane operating condition to carry out dynamic evaluation to calcium sulfate cleaner performance under this condition, filled this blank, and greatly improved the accuracy of reverse osmosis membrane calcium sulfate cleaner performance evaluation.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the dynamic performance evaluation device for the calcium sulfate cleaning agent of the reverse osmosis membrane of the present invention.
Wherein the reference numbers are as follows:
1: a test water tank; 2: a heat exchanger; 3: a high pressure pump; 4: a cartridge filter; 5: a reverse osmosis membrane module; 6-1: a first pressure gauge; 6-2: a second pressure gauge; 7-1: a first flow meter; 7-2: a second flow meter; 8-1: a first pipeline valve; 8-2: a second pipeline valve; 8-3: a third pipeline valve; 8-4: a fourth pipeline valve; 9-a thermometer; 10: a first pipeline; 11: a second pipeline; 12: a third pipeline; 13: a fourth pipeline; 14-1: a first conductivity meter; 14-2: a second conductivity meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are 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 all belong to the protection scope of the present invention.
As shown in figure 1, the utility model relates to a reverse osmosis membrane calcium sulfate cleaner performance developments evaluation device includes: the device comprises a test water tank 1, a heat exchanger 2, a high-pressure pump 3, a security filter 4, a reverse osmosis membrane component 5, a pressure gauge, a flowmeter, a pipeline valve, a thermometer 9 and a conductivity meter.
Wherein, the heat exchanger 2 is arranged in the test water tank 1, the thermometer 9 is arranged on the test water tank 1, the test water tank is also provided with a first conductivity meter 14-1, the reverse osmosis membrane component 5 is provided with a water inlet, a concentrated water port and a water production port, the water inlet of the reverse osmosis membrane component 5 is communicated with the test water tank 1 through a first pipeline 10, the concentrated water port is communicated with the test water tank 1 through a second pipeline 11, the first pipeline 10 is sequentially provided with a first pipeline valve 8-1, a high pressure pump 3, a first flow meter 7-1, a security filter 4, a fourth pipeline valve 8-4 and a first pressure gauge 6-1 along the direction from the test water tank 1 to the reverse osmosis membrane component 5, a fourth pipeline 13 is also arranged between the first flow meter 7-1 and the first pressure gauge 6-1, the fourth pipeline 13 is provided with a second pipeline valve 8-2, a second pressure gauge 6-2 and a third pipeline valve 8-3 are sequentially arranged on the second pipeline 11 along the direction from the reverse osmosis membrane module 5 to the test water tank 1, a water production port of the reverse osmosis membrane module 5 is also connected with a third pipeline 12, and a second conductivity meter 14-2 and a second flowmeter 7-2 are sequentially arranged on the third pipeline 12.
In this embodiment, the material of the test water tank 1 is plastic, so as to avoid corrosion caused by long-time contact with seawater. The test water tank has three purposes in the device: (1) calcium sulfate solution is contained in the reverse osmosis membrane pollution process; (2) cleaning agent is contained in the reverse osmosis membrane cleaning process; (3) the reverse osmosis membrane washing process is used for containing reverse osmosis produced water or deionized water.
The material of heat exchanger 2 in this embodiment is resistant sea water corrosion metal material, preferred titanium alloy, and its form is spiral metal pipeline, including intaking end and play water end, keeps warm or cools off through external different temperature water sources to the liquid medium in the test water tank.
The high pressure pump 3 in this embodiment is in the form of a plunger type high pressure pump or a centrifugal type high pressure pump for powering the water inlet side of the reverse osmosis membrane module.
The cartridge filter 4 in this embodiment comprises a housing, preferably made of stainless steel, and a filter element mounted inside the housing, the filter element having a filtration accuracy of 50-100 μm for filtering after the liquid medium has entered.
The reverse osmosis membrane module 5 in this embodiment includes a reverse osmosis membrane and a membrane support body, and is used for performing reverse osmosis treatment on a liquid medium, and the reverse osmosis membrane may be a commercially available membrane module, for example: type Dow SW30-2540 reverse osmosis seawater membrane.
In this embodiment, the pressure gauge is used for measuring the pressure of the pipeline, the flowmeter is used for measuring the flow rate of the liquid medium, the pipeline valve is used for opening or closing the pipeline to realize the flow and the cutoff of the liquid medium, and the thermometer 9 is used for measuring the temperature of the liquid medium in the test water tank 1.
In this embodiment, the first pipeline 10 is provided as a water inlet pipeline, which guides the medium in the test water tank 1 to the reverse osmosis membrane module 5; the second pipeline 11 is a concentrated water pipeline which guides the concentrated water treated by the reverse osmosis membrane component 5 into the test water tank 1; the third pipeline 12 is set as a water production pipeline and leads out the pure water treated by the reverse osmosis membrane component 5 for use; the fourth pipeline 13 is set as a water inlet bypass which is set to be opened at the calcium sulfate pollution stage of the reverse osmosis membrane to realize the calcium sulfate pollution of the reverse osmosis membrane.
The utility model relates to a reverse osmosis membrane subassembly of a reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device selects for use the reverse osmosis membrane subassembly of type Dow SW30-2540 reverse osmosis sea water film, and its basic parameter sees table 1, and experimental water is the sea water, through second grade sand filtration preliminary treatment.
TABLE 1SW30-2540 reverse osmosis membrane Main Specification
The dynamic evaluation method for the performance of the reverse osmosis membrane calcium sulfate cleaning agent is realized by the following technical scheme:
(1) initial operation
Installing a new Dow SW30-2540 reverse osmosis membrane, washing with seawater (0.2-0.4MPa), checking whether a leakage point exists in the washing process, and fastening or repairing the leakage point. And after the low-pressure flushing is carried out for at least 30 minutes, the high-pressure pump is started, the water inlet pressure is slowly increased to 4.6MPa through a third pipeline valve, the continuous operation is carried out for 1 hour, the test temperature is 25-30 ℃, and the initial parameters of the system are recorded after the conductivity of the produced water is stable. Continuously operating the reverse osmosis device for 24h, recording the produced water flow at intervals of 1h, testing the inflow water conductivity G1 and the produced water conductivity D2 by a conductivity meter, further calculating the membrane flux and the salt rejection rate of the reverse osmosis membrane in the initial operation state, and calculating the average membrane flux F1 and the average salt rejection rate D1 in 24h, wherein the calculation mode of the membrane flux F1 is as follows: after the system is stable, detecting the instantaneous water production flow of the water production pipeline every 1 hour, and calculating to obtain the membrane flux through the water production flow per unit area, wherein the calculation formula of the average desalination rate D1 is as follows:
(2) Calcium sulfate contamination of reverse osmosis membranes
At a temperature of 25 ℃, the saturation solubility of calcium sulfate in water is about 2000mg/L, and considering the influence of concentration polarization, the calcium sulfate solution with the concentration of 2000mg/L reaches the surface of the membrane and reaches a saturation state, and then calcium sulfate deposition occurs. Before the test is started, the test water tank is emptied, about 100L of deionized water is injected, 200g of calcium sulfate analytical reagent is added and mixed uniformly, so that the concentration of calcium sulfate in the water tank is about 2000mg/L, and the corresponding concentration of calcium ions is 800 mg/L.
Starting the dynamic evaluation device for the performance of the calcium sulfate cleaning agent of the reverse osmosis membrane, closing the valve of the fourth pipeline, and opening the valve of the second pipeline, so that the calcium sulfate solution enters the reverse osmosis membrane component from the water tank through the fourth pipeline; the concentration of calcium ions in the water tank was periodically sampled to estimate the deposition amount of calcium sulfate on the membrane surface, and the change of the membrane flux with the test time was recorded. And stopping the calcium sulfate pollution process when the water yield is reduced by 10-15%, obtaining the flux F2 of the reverse osmosis membrane at the moment, and then cleaning the reverse osmosis membrane.
(3) Reverse osmosis membrane cleaning
The cleaning test procedure was as follows: firstly, adopting reverse osmosis product water to carry out circulating flushing for 1 hour; cleaning for 1 hour circularly by adopting a cleaning agent and soaking for 2 hours statically, wherein the step runs for 5 cycles circularly; thirdly, circularly flushing by adopting reverse osmosis product water again, and recording at intervals of 1h until the water flux of the reverse osmosis membrane is stable.
(4) The reverse osmosis membrane is cleaned and then operated
And after the cleaning is finished, continuously using seawater as a water inlet source to operate the reverse osmosis device for 24h, recording the membrane flux and the desalination rate at an interval of 1h during the operation period, and calculating the average membrane flux F3 and the average desalination rate D2 within 24 h.
The utility model discloses a performance of two indexs of membrane flux recovery rate and membrane damage evaluation calcium sulfate cleaner.
The utility model relates to a reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device furthest reduction reverse osmosis membrane operating condition to carry out dynamic evaluation to calcium sulfate cleaner performance under this condition, filled this blank, and greatly improved the accuracy of reverse osmosis membrane calcium sulfate cleaner performance evaluation.
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 it; 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 or some of the technical features of the foregoing embodiments may be equally replaced by other technical solutions described in the foregoing description, and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a reverse osmosis membrane calcium sulfate cleaner performance dynamic evaluation device which characterized in that includes: the device comprises a test water tank, a heat exchanger, a high-pressure pump, a cartridge filter, a reverse osmosis membrane assembly, a pressure gauge, a flowmeter, a pipeline valve, a thermometer and a conductivity meter;
the heat exchanger is arranged in the test water tank, the thermometer is arranged on the test water tank, the test water tank is also provided with a first conductivity meter, the reverse osmosis membrane component is provided with a water inlet, a concentrated water port and a water production port, the water inlet is communicated with the test water tank through a first pipeline, the concentrated water port is communicated with the test water tank through a second pipeline, a first pipeline valve, a high-pressure pump, a first flowmeter, a safety filter, a fourth pipeline valve and a first pressure gauge are sequentially arranged on the first pipeline along the direction from the test water tank to the reverse osmosis membrane component, a fourth pipeline is also arranged between the first flowmeter and the first pressure gauge, a second pipeline valve is arranged on the fourth pipeline, a second pressure gauge and a third pipeline valve are sequentially arranged on the second pipeline along the direction from the reverse osmosis membrane component to the test water tank, the water production port is also connected with a third pipeline, and a second flowmeter and a second conductivity meter are sequentially arranged on the third pipeline.
2. The dynamic evaluation device for the performance of the reverse osmosis membrane calcium sulfate cleaning agent according to claim 1, wherein the test water tank is made of plastic.
3. The dynamic evaluation device for the performance of the reverse osmosis membrane calcium sulfate cleaning agent according to claim 1, wherein the heat exchanger is made of a seawater corrosion resistant metal material.
4. The dynamic evaluation device for the performance of the calcium sulfate cleaning agent for the reverse osmosis membrane according to claim 3, wherein the heat exchanger is arranged into a spiral pipeline and comprises a water inlet end and a water outlet end.
5. The dynamic evaluation device for the performance of the calcium sulfate cleaning agent for the reverse osmosis membrane as claimed in claim 1, wherein the high-pressure pump is a plunger type high-pressure pump or a centrifugal type high-pressure pump.
6. The dynamic evaluation device for the performance of the reverse osmosis membrane calcium sulfate cleaning agent according to claim 1, wherein the cartridge filter comprises a shell and a filter element arranged inside the shell, and the shell is made of seawater corrosion resistant material.
7. The dynamic evaluation device for the performance of the reverse osmosis membrane calcium sulfate cleaning agent according to claim 6, wherein the filtering precision of the filter element is set to be 50-100 μm.
8. The dynamic evaluation device for the performance of the reverse osmosis membrane calcium sulfate cleaning agent according to claim 1, wherein the reverse osmosis membrane module comprises a reverse osmosis membrane and a membrane support body.
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| CN202121430211.0U CN217092941U (en) | 2021-06-25 | 2021-06-25 | Dynamic evaluation device for performance of calcium sulfate cleaning agent of reverse osmosis membrane |
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