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CN120459802B - Device and method for detecting performance of filter membrane for water treatment of power plant - Google Patents

Device and method for detecting performance of filter membrane for water treatment of power plant

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Publication number
CN120459802B
CN120459802B CN202510962277.0A CN202510962277A CN120459802B CN 120459802 B CN120459802 B CN 120459802B CN 202510962277 A CN202510962277 A CN 202510962277A CN 120459802 B CN120459802 B CN 120459802B
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China
Prior art keywords
module
filter membrane
liquid
tested
power plant
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Application number
CN202510962277.0A
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Chinese (zh)
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CN120459802A (en
Inventor
贾静谭
王钊
拓凯
仵积锋
张小宏
田文华
王卫
郭渊博
梁永吉
刘钊
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Xian Thermal Power Research Institute Co Ltd
Huaneng Tongchuan Zhaojin Coal Power Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Huaneng Tongchuan Zhaojin Coal Power Co Ltd
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Application filed by Xian Thermal Power Research Institute Co Ltd, Huaneng Tongchuan Zhaojin Coal Power Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202510962277.0A priority Critical patent/CN120459802B/en
Publication of CN120459802A publication Critical patent/CN120459802A/en
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Publication of CN120459802B publication Critical patent/CN120459802B/en
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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 application provides a device and a method for detecting the performance of a filter membrane for water treatment of a power plant, wherein the device comprises a pipeline, a pressurizing module, a desalted water module, a first counting module, a filtering module, a second counting module and a control module, wherein the pressurizing module, the desalted water module, the first counting module, the filtering module and the second counting module are sequentially arranged in series in the pipeline from a liquid inlet to a liquid outlet. The pressurizing module comprises a variable-frequency pressurizing pump and a metering pump. The desalting module is used for desalting the experimental liquid. The filter module comprises a filter membrane clamp and a detection assembly, the filter membrane clamp is provided with a filter membrane to be tested so that the filter membrane to be tested filters experimental liquid, and the detection assembly detects the inlet and outlet flow and the pressure of the filter membrane clamp. The first counting module and the second counting module respectively detect particulate matters in experimental liquid before and after filtration. The control module automatically controls the pressurizing module, the desalted water module, the filtering module, the first counting module, the second counting module and the data record. The device can evaluate the performance indexes such as flux, bubble point and interception rate of the filter membrane conveniently, rapidly and accurately.

Description

Device and method for detecting performance of filter membrane for water treatment of power plant
Technical Field
The application relates to the technical field of water treatment, in particular to a device and a method for detecting the performance of a filter membrane for water treatment of a power plant.
Background
The filter membrane is a core component of a filter element in a water treatment system of a power plant and is widely applied to links such as pretreatment of condensate water, pretreatment of desalted water, treatment of boiler makeup water and the like. Its performance directly affects the filtering effect and system operating efficiency. At present, the filter membrane performance detection is dependent on a laboratory scale testing device, and the problems of complex operation, long testing period, low data precision and the like exist.
Disclosure of Invention
The embodiment of the application at least provides a device and a method for detecting the performance of a filter membrane for water treatment of a power plant, and the device can conveniently, rapidly and accurately evaluate the performance indexes such as flux, bubble point, interception rate and the like of the filter membrane.
In a first aspect, the embodiment of the application provides a filter membrane performance detection device for water treatment of a power plant, which comprises a pipeline, a pressurizing module, a desalted water module, a first counting module, a filter module, a second counting module and a control module, wherein the pressurizing module, the desalted water module, the first counting module, the filter module and the second counting module are sequentially arranged in series in the pipeline from a liquid inlet to a liquid outlet;
The pipeline is provided with a first bypass connected with two ends of the demineralized water module in a bridging way, a second bypass connected with two ends of the first counting module in a bridging way and a third bypass connected with two ends of the second counting module in a bridging way, and a liquid storage bottle is communicated between a liquid inlet and a liquid outlet of the pipeline;
the pressurizing module comprises a variable-frequency booster pump and a metering pump, wherein the variable-frequency booster pump is used for pressurizing experimental liquid entering the pipeline, and the metering pump is used for controlling the flow of the experimental liquid;
The desalting module is used for desalting the experimental liquid;
The filter module comprises a filter membrane clamp and a detection assembly, wherein the filter membrane clamp is provided with a filter membrane to be detected so that the filter membrane to be detected filters the experimental liquid, and the detection assembly is used for detecting inlet and outlet flow and pressure of the filter membrane clamp;
The first counting module and the second counting module are respectively used for detecting particulate matters in the experimental liquid before and after filtration;
The control module is used for automatically controlling the pressurizing module, the demineralized water module, the filtering module, the first counting module, the second counting module and the data record.
In an alternative embodiment, both the variable frequency booster pump and the metering pump are configured to operate bi-directionally to achieve both a forward filtering function and a reverse backwash function.
In an alternative embodiment, the pipeline is provided with a first sample port and a second sample port, the first sample port being located at the inlet of the filtration module, and the second sample port being located at the outlet of the filtration module.
In an alternative embodiment, the control module integrates flux calculation, bubble point calculation, and interception rate calculation functions.
In a second aspect, an embodiment of the present application further provides a method for detecting flux of a filter membrane for water treatment in a power plant, which is applicable to the device for detecting performance of a filter membrane for water treatment in a power plant, and the method includes the following steps:
Step1, installing a filter membrane to be tested in a filter module;
Step 2, opening a liquid inlet and a liquid outlet, inputting water into the liquid inlet, enabling the water to enter a filter module through a second bypass after pressurization and desalination, and then flowing out of the liquid outlet through a third bypass, and closing the liquid inlet and the liquid outlet after the pipeline is full of pipes so as to enable the water to continuously circulate in the pipeline;
Step 3, controlling the pressurizing module to adjust the flow of the inlet end of the filter membrane clamp, and obtaining a flow-pressure difference characteristic curve according to the inlet and outlet flow and pressure fitting of the filter membrane clamp;
And step 4, determining the flow of the filter membrane to be detected under the specified pressure difference according to the flow-pressure difference characteristic curve, and calculating the flux of the filter membrane to be detected under the specified pressure difference.
In an alternative embodiment, the method further comprises the steps of:
step 5, controlling the pressurizing module to reversely run so as to backwash the filter membrane to be tested;
step 6, repeating the steps 2-4 after backwashing is finished, and obtaining the flux of the filter membrane to be tested under a specified pressure difference again;
and 7, calculating flux recovery rate according to the flux of the two times, so as to judge the backwashing effect.
In an alternative embodiment, an acid or alkali solution is added to the water during backwash to enhance cleaning.
In a third aspect, an embodiment of the present application further provides a method for detecting a bubble point of a filter membrane for water treatment in a power plant, which is applicable to the device for detecting performance of a filter membrane for water treatment in a power plant, and the method includes the following steps:
Step1, installing a filter membrane to be tested in a filter module;
Step 2, opening a liquid inlet, closing a liquid outlet, inputting isopropyl alcohol into the liquid inlet, pressurizing the isopropyl alcohol, sequentially passing through a first bypass and a second bypass to enter a filter module, then flowing into a liquid storage bottle through a third bypass, and closing the pressurizing module after the pipeline is full of pipes;
And 3, inputting compressed air into the liquid inlet, slowly increasing the air pressure of the compressed air, and recording a corresponding system pressure value when the first series of continuous bubbles emerge from the filter membrane to be tested, wherein the system pressure value is the bubble point.
In a fourth aspect, an embodiment of the present application further provides a method for detecting interception rates of contaminants with different particle diameters by using a filter membrane for water treatment in a power plant, which is applicable to the foregoing device for detecting performance of a filter membrane for water treatment in a power plant, and the method includes the following steps:
Step1, installing a filter membrane to be tested in a filter module;
step 2, preparing a standard particulate matter solution according to nominal accuracy of the filter membrane to be tested;
Step 3, opening a liquid inlet and a liquid outlet, inputting a standard particulate matter solution into the liquid inlet, and enabling the standard particulate matter solution to pass through a first counting module, a filtering module and a second counting module in sequence after being pressurized, and flow out from the liquid outlet;
step 4, controlling the pressurizing module to adjust the flow of the inlet end of the filter membrane clamp, and recording the particle quantity of different particle diameters of the first counting module and the second counting module after the flow is stable;
and 5, calculating the filtering efficiency of the filter membrane to be detected on the particles with different particle diameters according to the recorded particle quantity with different particle diameters.
In an alternative embodiment, the method further comprises the steps of:
Step 6, respectively carrying out sample detection through the first sample detection port and the second sample detection port;
and 7, calculating the interception rate of the filter membrane to be detected on the target substance according to the sample detection result.
The technical scheme of the application has the following beneficial technical effects:
according to the filter membrane performance detection device for the water treatment of the power plant, provided by the embodiment of the application, the high-efficiency and accurate detection of the filter membrane flux, the bubble point and the interception rate is realized by integrating the pressurizing module, the desalted water module, the filtering module and the counting module and combining with automatic control. The device is easy and simple to handle, is applicable to on-the-spot quick test, has solved the limitation that traditional laboratory detected.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are necessary for the embodiments to be used are briefly described below, the drawings being incorporated in and forming a part of the description, these drawings showing embodiments according to the present application and together with the description serve to illustrate the technical solutions of the present application. It is to be understood that the following drawings illustrate only certain embodiments of the application and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may admit to other equally relevant drawings without inventive effort.
FIG. 1 shows a schematic diagram of a filter membrane performance detection device for water treatment of a power plant according to an embodiment of the present application;
In the figure, 10, pipelines, 11, a first bypass, 12, a second bypass, 13, a third bypass, 14, a liquid storage bottle, 15, a first sample detection port, 16, a second sample detection port, 20, a pressurizing module, 21, a variable-frequency pressurizing pump, 22, a metering pump, 30, a desalting water module, 31, a rough filtration folding filter core, 32, a reverse osmosis membrane, an ultraviolet lamp, 40, a first counting module, 50, a filtering module, 51, a filter membrane clamp, 52, a first pressure transmitter, 53, a second pressure transmitter, 54, a first electromagnetic flowmeter, 55, a second electromagnetic flowmeter, 60, a second counting module, 70, a control module, 80 and a shell.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The features of the application "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the application provides a device and a method for detecting the performance of a filter membrane for water treatment of a power plant, and the device can conveniently, rapidly and accurately evaluate the performance indexes such as flux, bubble point, interception rate and the like of the filter membrane.
Specifically, the filter membrane performance detection device for water treatment of the power plant comprises a pipeline 10, a pressurizing module 20, a desalted water module 30, a first counting module 40, a filtering module 50, a second counting module 60 and a control module 70, wherein the pressurizing module 20, the desalted water module 30, the first counting module 40, the filtering module 50 and the second counting module 60 are sequentially arranged in series in the pipeline 10 from a liquid inlet to a liquid outlet. The pipeline 10 is provided with a first bypass 11 connected across the two ends of the demineralized water module 30, a second bypass 12 connected across the two ends of the first counting module 40 and a third bypass 13 connected across the two ends of the second counting module 60, and a liquid storage bottle 14 is communicated between a liquid inlet and a liquid outlet of the pipeline 10. The pressurizing module 20 comprises a variable-frequency pressurizing pump 21 and a metering pump 22, wherein the variable-frequency pressurizing pump 21 is used for pressurizing experimental liquid entering the pipeline 10, and the metering pump 22 is used for controlling the flow rate of the experimental liquid. The desalted water module 30 is used for desalting the experimental liquid. The filter module 50 comprises a filter membrane clamp 51 and a detection assembly, wherein the filter membrane clamp 51 is provided with a filter membrane to be detected so that the filter membrane to be detected filters the experimental liquid, and the detection assembly is used for detecting the inlet and outlet flow and the pressure of the filter membrane clamp 51. The first counting module 40 and the second counting module 60 are respectively used for detecting particulate matters in the experimental liquid before and after filtration. The control module 70 is configured to automatically control the pressurization module 20, the demineralized water module 30, the filtration module 50, the first and second counting modules 40, 60, and the data recording.
According to the filter membrane performance detection device for the water treatment of the power plant, provided by the embodiment of the application, the high-efficiency and accurate detection of the filter membrane flux, the bubble point and the interception rate is realized by integrating the pressurizing module 20, the desalted water module 30, the filtering module 50 and the counting module and combining with automatic control. The device is easy and simple to handle, is applicable to on-the-spot quick test, has solved the limitation that traditional laboratory detected.
Optionally, in some embodiments, the inlet end of the liquid storage bottle 14 is provided with a first valve, and the outlet end of the liquid storage bottle 14 is provided with a second valve. When the experimental liquid normally enters and exits from the liquid inlet and the liquid outlet, the first valve and the second valve are in a closed state, and when the experimental liquid needs to circulate in a circulation path formed by the liquid storage bottle 14 and the pipeline 10, the liquid inlet and the liquid outlet can be opened, and the first valve and the second valve can be opened.
Optionally, in some embodiments, the conduit 10 is provided with a first sample port 15 and a second sample port 16, the first sample port 15 being located at the inlet of the filtration module 50 and the second sample port 16 being located at the outlet of the filtration module 50. Specifically, in the use process, the first sample detecting port 15 and the second sample detecting port 16 are respectively used for detecting experimental liquids before and after filtration, so that the interception rate of the filter membrane to be detected on the target substances can be determined according to the concentration of the target substances in the two samples.
Optionally, in some embodiments, both the variable frequency booster pump 21 and the metering pump 22 are configured to be capable of bi-directional operation to achieve both a forward filtering function and a reverse backwash function. Specifically, the variable-frequency booster pump 21 and the metering pump 22 can both be operated in the forward direction and in the reverse direction, experimental liquid enters from the liquid inlet and can be filtered by the filtering module 50, and in the reverse direction, experimental liquid enters from the liquid outlet and can be cleaned in the reverse direction by the filtering module 50 to the filter membrane to be tested.
Optionally, in some embodiments, the desalination module 30 achieves multistage desalination and sterilization by straining the pleated filter element 31, reverse osmosis membrane 32, and ultraviolet lamp 33. Specifically, when the experimental liquid passes through the desalted water module 30, it is sequentially filtered and desalted and sterilized by the rough filtration folded filter element 31, the reverse osmosis membrane 32 and the ultraviolet lamp 33.
Optionally, in some embodiments, the filter membrane holder 51 of the filter module 50 is configured to be capable of expanding the filter membrane to be tested by mechanical tension, and the mechanical tension of the filter membrane holder 51 is adjustable. By the arrangement, the filter membrane clamp 51 can be suitable for unfolding filter membranes of different specifications and models, and the applicability is improved. For example, the mechanical tension required for PP film expansion is 5mpa, the mechanical tension required for pes film expansion is 10mpa, and the mechanical tension required for pvdf film expansion is 15 MPa. Of course, the filter membrane holder 51 capable of changing the mechanical tension belongs to the conventional art, and this embodiment will not be described in detail.
Optionally, in some embodiments, the sensing components of the filtration module 50 include a first pressure transmitter 52, a second pressure transmitter 53, a first electromagnetic flow meter 54, and a second electromagnetic flow meter 55. A first pressure transmitter 52 is located at the inlet end of the filter holder 51, the first pressure transmitter 52 being adapted to detect the inlet pressure of the filter holder 51. A second pressure transmitter 53 is located at the outlet end of the filter holder 51, the second pressure transmitter 53 being adapted to detect the outlet pressure of the filter holder 51. The first electromagnetic flowmeter 54 is located at an inlet end of the filter membrane holder 51, and the first electromagnetic flowmeter 54 is used for detecting inlet flow of the filter membrane holder 51. A second electromagnetic flowmeter 55 is located at the outlet end of the filter membrane holder 51, and the second electromagnetic flowmeter 55 is used for detecting the outlet flow rate of the filter membrane holder 51.
Optionally, in some embodiments, the control module 70 integrates flux calculation, bubble point calculation, and intercept rate calculation functions. That is, the control module 70 can automatically obtain the flux, bubble point and interception rate of the filter membrane to be tested according to the detection condition.
Optionally, in some embodiments, the apparatus further comprises a housing 80, the line 10, the pressurization module 20, the demineralized water module 30, the first counting module 40, the filtration module 50, the second counting module 60, and the control module 70 are all integrated into the housing 80. The filter membrane performance detection device for water treatment of the power plant can be conveniently stored and carried. Of course, for ease of use, the inlet, outlet, first sample port 15 and second sample port 16 of the tubing 10 may extend to the exterior or outer surface of the housing 80 when specifically configured.
Example 1
A method for detecting the flux of a filter membrane for water treatment of a power plant, which is suitable for the device for detecting the performance of the filter membrane for water treatment of the power plant, and comprises the following steps:
Step 1, installing a filter membrane to be tested in (a filter membrane clamp 51 of) a filter module 50;
Step 2, opening a liquid inlet and a liquid outlet (of the pipeline 10), inputting water into the liquid inlet, pressurizing the water by the pressurizing module 20, desalting by the desalting module 30, then entering the filtering module 50 by the second bypass 12, and then flowing out of the liquid outlet by the third bypass 13, and closing the liquid inlet and the liquid outlet after the pipeline 10 is full of pipes, so that the (desalted) water continuously circulates in the pipeline 10;
Step 3, controlling the pressurizing module 20 (adjusting the output of the variable-frequency pressurizing pump 21 and the opening of the electromagnetic adjusting valve) to adjust the flow of the inlet end of the filter membrane clamp 51 (through the control module 70), and obtaining a flow-pressure difference characteristic curve according to the inlet and outlet flow and pressure fitting of the filter membrane clamp 51;
And step 4, determining the flow of the filter membrane to be detected under the specified pressure difference according to the flow-pressure difference characteristic curve, and calculating the flux of the filter membrane to be detected under the specified pressure difference, thereby determining the volume of the filtrate of the filter membrane to be detected passing through the unit membrane area in unit time. The flux is calculated as follows:
J= V/A
Wherein J is membrane flux, and the unit is m 3/(m2. H);
V-flow under specified pressure differential, unit is m 3/h;
a is the effective filtration area of the membrane in the filter membrane clamp, and the unit is m 2.
Further, the method may further include:
step 5, controlling the pressurizing module to reversely run so as to backwash the filter membrane to be tested;
step 6, repeating the steps 2-4 after backwashing is finished, and obtaining the flux of the filter membrane to be tested under a specified pressure difference again;
and 7, calculating flux recovery rate according to the flux of the two times, so as to judge the backwashing effect, wherein the flux recovery rate has the following calculation formula:
R(%)=(J2-J1)/J1
wherein, R is flux recovery rate, and the unit is;
J1, the flux of the filter membrane before backwashing and cleaning is m 3/(m2. H);
j2-membrane flux after backwashing and cleaning, and the unit is m 3/(m2. H).
That is, the filter membrane to be measured may be an old filter membrane that has been used, and the flux of the filter membrane to be measured may be detected before and after backwashing, respectively, to determine the backwashing effect on the old filter membrane.
In addition, the pressurizing module 20 is controlled to reversely operate to backwash the filter membrane to be tested, and in fact, the variable-frequency booster pump 21 and the metering pump 22 are controlled to reversely operate, when the variable-frequency booster pump 21 and the metering pump 22 reversely operate, water enters from the liquid outlet and can pass through the filtering module 50 to reversely clean the filter membrane to be tested. Of course, to enhance the backwash cleaning effect, an acid or alkali solution may also be added to the water during backwash.
Example 2
A method for detecting bubble point of a filter membrane for water treatment of a power plant, which is suitable for the device for detecting performance of the filter membrane for water treatment of the power plant, and comprises the following steps:
Step 1, installing a filter membrane to be tested in (a filter membrane clamp 51 of) a filter module 50;
Step 2, opening a liquid inlet (of the pipeline 10), closing a liquid outlet, inputting isopropanol into the liquid inlet, pressurizing the isopropanol, sequentially passing through a first bypass 11 and a second bypass 12 to enter a filter module 50, then flowing into a liquid storage bottle 14 through a third bypass 13, and closing a pressurizing module 20 after the pipeline 10 is full;
And 3, inputting compressed air into the liquid inlet, slowly increasing the air pressure of the compressed air, and recording a corresponding system pressure value when the first series of continuous bubbles emerge from the filter membrane to be tested, wherein the system pressure value is the bubble point.
After the bubble point is recorded, the air pressure of the compressed air can be slowly increased, whether the pressure value of the system can continuously increase or not is observed, and if the pressure value can continuously increase, the air source is closed to release pressure after the bubble group occurs. It should be noted that bubbles may be adsorbed or retained on the outer surface of the filter membrane to be tested, and a few pseudo bubbles are generated, and such bubbles should be ignored.
In addition, in the case of bubble point determination, the maximum pore size of the filter membrane can be calculated according to the Young-Laplace equation, and the specific formula is as follows:
d= (4γcosθ)/ΔP
Wherein ΔP-bubble point pressure, the minimum pressure required for the gas to penetrate the membrane pores, in Pa;
Gamma—the surface tension of the liquid in mN/m, for example isopropanol at 20℃is about 21.3 mN/m;
θ—the contact angle of the liquid with the film material, reflecting the wettability, cos θ=1 when fully wetted;
d-membrane pore size, i.e., theoretical maximum pore size (maximum pore size measured by bubble point method), in mm.
Example 3
The method for detecting the interception rate of the filter membrane for the water treatment of the power plant to pollutants with different particle diameters is suitable for the filter membrane performance detection device for the water treatment of the power plant, and comprises the following steps:
Step 1, installing a filter membrane to be tested in (a filter membrane clamp 51 of) a filter module 50;
step 2, preparing a standard particulate matter solution according to nominal accuracy of the filter membrane to be tested;
step 3, opening a liquid inlet and a liquid outlet, inputting a standard particulate matter solution into the liquid inlet, and enabling the standard particulate matter solution to pass through the first counting module 40, the filtering module 50 and the second counting module 60 in sequence after being pressurized, and then flow out from the liquid outlet;
Step 4, controlling the pressurizing module 20 to adjust the flow of the inlet end of the filter membrane clamp 51, and recording the particle numbers of different particle diameters of the first counting module 40 and the second counting module 60 after the flow is stable;
and 5, calculating the filtering efficiency of the filter membrane to be detected on the particles with different particle diameters according to the recorded particle quantity with different particle diameters.
For example, the standard particulate solution may be a standard particulate solution having a concentration of 1g/L, and the solution contains five types of particulate matters having different particle diameters, denoted as A1, A2, A3, A4 and A5, respectively. During the filtration process, the filtration flow rate can be controlled at 0.5m 3/h (+ -20%).
In calculating the filtration efficiency, 5 pairs of upstream and downstream particle size distribution comparison data may be used as one group, and 20 pairs of upstream and downstream particle size distribution comparison data may be used as a total, and 4 groups. Calculating the average value of the particle numbers under 4 groups of particle size channels, and calculating the filtering efficiency with required precision, wherein the calculation formula is as follows:
Wherein eta is the filtering efficiency of the required precision, and the unit is;
-the average of the number of particles greater than the particle size of the desired precision in units of one/ml in the 4 sets of data recorded in the upstream particle counter;
The average of the number of particles greater than the desired precision particle size in units of one/ml in the 4 sets of data recorded in the downstream particle counter.
Further, the method may further include:
Step 6, respectively performing sample detection through the first sample detection port 15 and the second sample detection port 16;
And 7, calculating the interception rate of the filter membrane to be detected on the target substance according to the sample detection result, wherein the calculation formula of the interception rate of the target substance is as follows:
Wherein, the -The interception rate of the target substance in units of;
-upstream target substance concentration in mmol/L;
-downstream target substance concentration in mmol/L;
That is, the method can be used for detecting the interception rate of the filter membrane to be detected to other target substances. For example, when the interception rate of the filter membrane to the tetracycline antibiotics is required to be detected, the filter membrane can be sampled from an upstream external port and a downstream external port, and the interception rate of the filter membrane to the target substances can be calculated by detecting the concentration of the filter membrane from the upstream and the downstream by using an ultraviolet-visible spectrophotometer.
The present disclosure is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. It is therefore contemplated to cover any such omissions, modifications, equivalents, improvements or similar fall within the spirit and scope of the one or more embodiments of the application.
The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (10)

1.一种发电厂水处理用滤膜性能检测装置，其特征在于，包括：管路，自进液口至出液口的方向依次串设于管路的增压模块、除盐水模块、第一计数模块、过滤模块和第二计数模块，以及控制模块；1. A filter membrane performance testing device for power plant water treatment, comprising: a pipeline, a booster module, a desalted water module, a first counting module, a filtration module, a second counting module, and a control module, arranged in series in the pipeline from a liquid inlet to a liquid outlet; 所述管路设置有跨接于所述除盐水模块两端的第一旁路、跨接于所述第一计数模块两端的第二旁路以及跨接于所述第二计数模块两端的第三旁路，所述管路的进液口和出液口之间连通有储液瓶；The pipeline is provided with a first bypass connected across the two ends of the desalted water module, a second bypass connected across the two ends of the first counting module, and a third bypass connected across the two ends of the second counting module. A liquid storage bottle is connected between the liquid inlet and the liquid outlet of the pipeline; 所述增压模块包括变频增压泵和计量泵，所述变频增压泵用于对进入所述管路的实验液体进行增压，所述计量泵用于控制所述实验液体的流量；The boosting module includes a variable frequency boosting pump and a metering pump, wherein the variable frequency boosting pump is used to boost the pressure of the experimental liquid entering the pipeline, and the metering pump is used to control the flow rate of the experimental liquid; 所述除盐水模块用于对所述实验液体进行除盐；The desalted water module is used to desalinate the experimental liquid; 所述过滤模块包括滤膜夹具和检测组件，所述滤膜夹具安装待测滤膜以使所述待测滤膜过滤所述实验液体，所述检测组件用于检测所述滤膜夹具的进出口流量以及压力；The filtration module includes a filter membrane fixture and a detection component, the filter membrane fixture is installed with the filter membrane to be tested so that the filter membrane to be tested filters the experimental liquid, and the detection component is used to detect the inlet and outlet flow and pressure of the filter membrane fixture; 所述第一计数模块和所述第二计数模块分别用于检测过滤前后的所述实验液体中的颗粒物；The first counting module and the second counting module are respectively used to detect particles in the experimental liquid before and after filtration; 所述控制模块用于自动化控制所述增压模块、所述除盐水模块、所述过滤模块、所述第一计数模块和所述第二计数模块以及数据记录。The control module is used for automatically controlling the boosting module, the desalted water module, the filtration module, the first counting module, the second counting module and data recording. 2.根据权利要求1所述的发电厂水处理用滤膜性能检测装置，其特征在于，所述变频增压泵和所述计量泵均被设置为能够双向运行，以实现正向过滤功能和反向反洗功能。2. The filter membrane performance detection device for power plant water treatment according to claim 1 is characterized in that the variable frequency booster pump and the metering pump are both configured to be able to operate in both directions to achieve forward filtration function and reverse backwash function. 3.根据权利要求1所述的发电厂水处理用滤膜性能检测装置，其特征在于，所述管路设置有第一检样口和第二检样口，所述第一检样口位于所述过滤模块的进口，所述第二检样口位于所述过滤模块的出口。3. The filter membrane performance detection device for power plant water treatment according to claim 1, characterized in that the pipeline is provided with a first sample inspection port and a second sample inspection port, the first sample inspection port is located at the inlet of the filter module, and the second sample inspection port is located at the outlet of the filter module. 4.根据权利要求1所述的发电厂水处理用滤膜性能检测装置，其特征在于，所述控制模块集成有通量计算、泡点计算及拦截率计算功能。4. The filter membrane performance detection device for power plant water treatment according to claim 1 is characterized in that the control module integrates flux calculation, bubble point calculation and interception rate calculation functions. 5.一种发电厂水处理用滤膜通量检测方法，适用于权利要求1-4任一项所述的发电厂水处理用滤膜性能检测装置，其特征在于，所述方法包括以下步骤：5. A method for detecting flux of a filter membrane for water treatment in a power plant, applicable to the filter membrane performance detection device for water treatment in a power plant according to any one of claims 1 to 4, characterized in that the method comprises the following steps: 步骤1、将待测滤膜安装于过滤模块中；Step 1: Install the filter membrane to be tested in the filtration module; 步骤2、打开进液口和出液口，向进液口输入水，水经增压、除盐后由第二旁路进入过滤模块，随后经过第三旁路从出液口流出，当管路满管后，关闭进液口和出液口，使水在管路中持续循环；Step 2: Open the liquid inlet and outlet, input water into the liquid inlet, and after pressurization and desalination, the water enters the filter module through the second bypass, and then flows out of the liquid outlet through the third bypass. When the pipeline is full, close the liquid inlet and outlet to allow the water to continue to circulate in the pipeline; 步骤3、控制增压模块以调节滤膜夹具进口端的流量，并根据滤膜夹具的进出口流量以及压力拟合得到流量-压差特性曲线；Step 3: Control the boost module to adjust the flow rate at the inlet end of the filter membrane fixture, and obtain a flow-pressure differential characteristic curve based on the inlet and outlet flow rates and pressure of the filter membrane fixture; 步骤4、根据流量-压差特性曲线确定待测滤膜在规定压差下的流量，并以此计算待测滤膜在规定压差下的通量。Step 4: Determine the flow rate of the filter membrane to be tested under the specified pressure difference according to the flow-pressure differential characteristic curve, and calculate the flux of the filter membrane to be tested under the specified pressure difference based on this. 6.根据权利要求5所述的方法，其特征在于，所述方法还包括以下步骤：6. The method according to claim 5, further comprising the following steps: 步骤5、控制增压模块反向运行以反洗待测滤膜；Step 5: Control the boost module to run in reverse to backwash the filter membrane to be tested; 步骤6、待反洗结束后，重复步骤2-步骤4，并再次得到待测滤膜在规定压差下的通量；Step 6: After the backwash is completed, repeat steps 2 to 4 and obtain the flux of the filter membrane under the specified pressure difference again; 步骤7、根据两次的通量计算通量恢复率，以此判断反洗效果。Step 7: Calculate the flux recovery rate based on the two fluxes to determine the backwash effect. 7.根据权利要求6所述的方法，其特征在于，反洗过程中向水中加入酸或碱溶液以增强清洁效果。7. The method according to claim 6, characterized in that an acid or alkaline solution is added to the water during the backwashing process to enhance the cleaning effect. 8.一种发电厂水处理用滤膜泡点检测方法，适用于权利要求1-4任一项所述的发电厂水处理用滤膜性能检测装置，其特征在于，所述方法包括以下步骤：8. A method for detecting the bubble point of a filter membrane used in power plant water treatment, applicable to the filter membrane performance detection device for power plant water treatment according to any one of claims 1 to 4, characterized in that the method comprises the following steps: 步骤1、将待测滤膜安装于过滤模块中；Step 1: Install the filter membrane to be tested in the filtration module; 步骤2、打开进液口，关闭出液口，向进液口输入异丙醇，异丙醇经增压后依次经过第一旁路和第二旁路进入过滤模块，随后经过第三旁路流入储液瓶中，当管路满管后，关闭增压模块；Step 2: Open the liquid inlet, close the liquid outlet, and input isopropyl alcohol into the liquid inlet. After being pressurized, the isopropyl alcohol enters the filtration module through the first bypass and the second bypass in sequence, and then flows into the liquid storage bottle through the third bypass. When the pipeline is full, close the booster module; 步骤3、在进液口输入压缩空气，并缓慢升高压缩空气的气压，当第一串连续气泡从待测滤膜上冒出时，记录该气泡冒出时对应的系统压力值，该系统压力值即为泡点。Step 3: Input compressed air into the liquid inlet and slowly increase the pressure of the compressed air. When the first string of continuous bubbles emerges from the filter membrane to be tested, record the system pressure value corresponding to the bubble emergence. This system pressure value is the bubble point. 9.一种发电厂水处理用滤膜对不同粒径污染物的拦截率的检测方法，适用于权利要求1-4任一项所述的发电厂水处理用滤膜性能检测装置，其特征在于，所述方法包括以下步骤：9. A method for detecting the interception rate of a filter membrane used for water treatment in a power plant for pollutants of different particle sizes, applicable to the filter membrane performance detection device for water treatment in a power plant according to any one of claims 1 to 4, characterized in that the method comprises the following steps: 步骤1、将待测滤膜安装于过滤模块中；Step 1: Install the filter membrane to be tested in the filtration module; 步骤2、根据待测滤膜的标称精度调配标准颗粒物溶液；Step 2: Prepare a standard particle solution according to the nominal accuracy of the filter membrane to be tested; 步骤3、打开进液口和出液口，向进液口输入标准颗粒物溶液，标准颗粒物溶液经增压后依次经过第一计数模块、过滤模块和第二计数模块，从出液口流出；Step 3: Open the liquid inlet and the liquid outlet, input the standard particulate matter solution into the liquid inlet, and the standard particulate matter solution passes through the first counting module, the filtering module, and the second counting module in sequence after being pressurized, and flows out from the liquid outlet; 步骤4、控制增压模块以调节滤膜夹具进口端的流量，待流量稳定后，记录第一计数模块和第二计数模块各自的不同粒径的颗粒物数量；Step 4: Control the boost module to adjust the flow rate at the inlet end of the filter membrane fixture. After the flow rate stabilizes, record the number of particles of different particle sizes in the first counting module and the second counting module. 步骤5、根据所记录的不同粒径的颗粒物数量计算待测滤膜对不同粒径颗粒物的过滤效率。Step 5: Calculate the filtration efficiency of the filter membrane to be tested for particles of different sizes based on the recorded number of particles of different sizes. 10.根据权利要求9所述的方法，其特征在于，所述方法还包括以下步骤：10. The method according to claim 9, further comprising the following steps: 步骤6、通过第一检样口和第二检样口分别进行检样；Step 6: inspect samples through the first inspection port and the second inspection port respectively; 步骤7、根据检样结果计算待测滤膜对目标物质的拦截率。Step 7: Calculate the interception rate of the filter membrane to be tested for the target substance based on the test sample results.
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