Testing Device and Method for Compatibility between Water Treatment Chemicals and Filter Membranes

Abstract

The present disclosure relates to the field of water treatment technologies, and particularly to a test device and method for the compatibility between a water treatment chemical and a filtration membrane. The test device for the compatibility between a water treatment chemical and a filtration membrane provided by the present disclosure includes: a constant-pressure container and a measurement container. The constant-pressure container has a liquid inlet for introducing a liquid; the measurement container is detachably connected to the constant-pressure container; wherein, a communication valve is provided on the constant-pressure container, a liquid storage cavity is formed between the communication valve and the top of the constant-pressure container, the liquid inlet is communicated with the liquid storage cavity, the measurement container is provided with a filtration membrane base for placing a filtration membrane, and a filtrate collection cavity is formed between the filtration membrane base and the bottom of the measurement container, which can be used to quickly evaluate the compatibility between a variety of different or different-concentration water treatment chemicals and the selected filtration membrane.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water treatment, and particularly to a test device and method for the compatibility between a water treatment agent and a filtration membrane. Background Art

[0002] Water treatment agents, also known as water treatment chemicals, refer to chemicals used in various water treatments, including flocculants, corrosion inhibitors, scale inhibitors, biocides, dispersants, cleaning agents, prefilming agents, defoamers, decolorants, chelating agents, deoxidizers, and ion exchange resins, etc. Water treatment agents are widely used in industries such as chemical engineering, petroleum, light industry, daily chemicals, textiles, printing and dyeing, construction, metallurgy, machinery, medicine and health, transportation, urban and rural environmental protection, etc., including chemicals required for wastewater and sewage treatment, cooling water and boiler water treatment, seawater and brackish water desalination, membrane separation, biological treatment, flocculation, and ion exchange technologies. Due to the differences in water environments and the particularities of production processes and uses, chemical water treatment has strong professionalism and applicability. Industrial water treatment often involves a wide variety of water qualities, complex compositions, a wide coverage, and an application environment closely related to large-scale production. Therefore, it is necessary to "prescribe the right medicine" according to the specific water environment, adopt different process routes and solutions, and also have different usages of agents. In the water treatment filtration membrane process, incorrect use or use of an inappropriate concentration of water treatment agents will seriously affect the performance of the water treatment filtration membrane, and may even lead to serious and irreparable membrane fouling, resulting in the scrapping of the filtration membrane system. Therefore, it is particularly important to develop a widely applicable rapid test and evaluation device for the compatibility between water treatment agents and filtration membranes. Summary of the Invention

[0003] To solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a test device and method for the compatibility between a water treatment agent and a filtration membrane.

[0004] In a first aspect of the present disclosure, a test device for the compatibility between a water treatment agent and a filtration membrane is provided, including: a constant-pressure container having a liquid inlet for introducing liquid;

[0005] a measuring container detachably connected to the constant-pressure container;

[0006] wherein, a communication valve is provided on the constant-pressure container, a liquid storage cavity is formed between the communication valve and the top of the constant-pressure container, the liquid inlet is communicated with the liquid storage cavity, a filtration membrane base for placing a filtration membrane is provided on the measuring container, and a filtrate collection cavity is formed between the filtration membrane base and the bottom of the measuring container.

[0007] Further, the constant-pressure container has an air inlet for introducing constant-pressure gas, the air inlet is communicated with the liquid storage cavity, and an air inlet valve is provided on the air inlet.

[0008] Further, a liquid inlet valve is provided at the liquid inlet.

[0009] Further, the measuring container is provided with a discharge port, and the discharge port is communicated with the filtrate collection chamber.

[0010] Further, the constant pressure container and the measuring container are connected by a thread;

[0011] Or, the constant pressure container and the measuring container are connected by a Koppling;

[0012] Or, the constant pressure container and the measuring container are connected by a detachable clamp.

[0013] Further, the measuring container includes a filtrate collection container and a connecting member. The filtrate collection chamber is located in the filtrate collection container. The filtrate collection container and the connecting member are detachably connected. One end of the connecting member away from the filtrate collection container is detachably connected to the constant pressure container;

[0014] Wherein, the connecting member forms a channel communicating the constant pressure container and the filtrate collection container, and the filter membrane base is disposed in the channel.

[0015] Further, the connecting member includes a protrusion provided on the inner wall of the channel, and the protrusion extends along the circumferential direction of the inner wall.

[0016] Further, the filtrate collection container is made of a transparent material, and the filtrate collection container is provided with scale lines.

[0017] Further, the connecting member is respectively connected to the filtrate collection container and the constant pressure container by a thread;

[0018] Or, the connecting member is respectively connected to the filtrate collection container and the constant pressure container by a Koppling;

[0019] Or, the connecting member is respectively connected to the filtrate collection container and the constant pressure container by a detachable clamp.

[0020] The second aspect of the present disclosure provides a method for testing the compatibility between a water treatment chemical and a filter membrane, including the following steps:

[0021] Step S1: Place the filter membrane to be tested on the filter membrane base, introduce the solution to be tested into the liquid storage chamber of the constant pressure container, and close the liquid inlet valve after the solution addition is completed;

[0022] Step S2: Open the air inlet valve and introduce constant pressure gas into the liquid storage chamber of the constant pressure container;

[0023] Step S3: Wait for the constant-pressure container to reach the preset pressure, open the connection valve, and continue to introduce constant-pressure gas to ensure a constant filtration pressure.

[0024] Step S4: Measure the volume or weight of the liquid entering the measurement container per unit time.

[0025] The technical solution provided by the embodiments of the present disclosure has the following advantages compared with the prior art:

[0026] The test device for the compatibility between the water treatment agent and the filtration membrane provided by the embodiments of the present disclosure includes: a constant-pressure container and a measurement container. The constant-pressure container has a liquid inlet for introducing liquid. The measurement container is detachably connected to the constant-pressure container. The constant-pressure container is provided with a connection valve, and a liquid storage cavity is formed between the connection valve and the top of the constant-pressure container. The liquid inlet is communicated with the liquid storage cavity. The measurement container is provided with a filtration membrane base for placing the filtration membrane, and a filtrate collection cavity is formed between the filtration membrane base and the bottom of the measurement container. When in use, place the filtration membrane to be tested on the filtration membrane base, prepare the water treatment agent solution according to requirements, introduce the prepared solution into the constant-pressure container from the liquid inlet, close the liquid inlet valve after the solution addition is completed, and then constant-pressure gas can be introduced from the liquid inlet. After the pressure reaches a certain value, open the connection valve. Under the pressure driving action of the constant-pressure gas under a certain pressure condition, the solution penetrates through the membrane pores of the filtration membrane and enters the measurement container. By measuring the amount of the solution entering the measurement container, the amount of the water treatment agent solution penetrating through the filtration membrane per unit time can be obtained. By comparing the differences in the amounts of the water treatment agent solutions penetrating through the filtration membrane per unit time, the influence of this water treatment solution on the selected filtration membrane can be evaluated. The test device for the compatibility between the water treatment agent and the filtration membrane provided by the embodiments of the present disclosure has a simple structure and can be used to quickly evaluate the compatibility between a variety of different or different-concentration water treatment agents and the selected filtration membrane. Description of the Drawings

[0027] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0028] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of the test device for the compatibility between the water treatment agent and the filtration membrane described in the embodiments of the present disclosure.

[0030] Reference numerals: 1, constant pressure container; 11, inlet; 111, inlet valve; 12, liquid inlet; 121, liquid inlet valve; 13, liquid storage chamber; 14, connection valve; 2, measuring container; 21, connecting member; 211, channel; 211a, filter membrane base; 22, filtered liquid collection container; 221, filtered liquid collection chamber; 222, discharge port; 223, scale line; 3, filter membrane. Detailed implementation manners

[0031] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0033] In the field of water treatment, different types and concentrations of water treatment agents are often used. The water treatment agents will form aqueous solutions in different states in the aqueous solution and have different effects on the water treatment filter membrane. Therefore, the embodiments of the present disclosure provide a rapid test and evaluation device for the compatibility between a widely applicable water treatment agent and a filter membrane.

[0034] As Figure 1 shown, the test device for the compatibility between the water treatment agent and the filter membrane provided by the embodiments of the present disclosure includes: a constant pressure container 1 and a measuring container 2. The constant pressure container 1 has a liquid inlet 12 for introducing liquid. The measuring container 2 is detachably connected to the constant pressure container 1. The constant pressure container 1 is provided with a connection valve 14, and the connection valve 14 is used to separate the connection space between the constant pressure container 1 and the measuring container 2. A liquid storage chamber 13 is formed between the connection valve 14 and the top of the constant pressure container 1. The liquid inlet 12 is communicated with the liquid storage chamber 13 and is provided with a liquid inlet valve 121. The measuring container 2 is provided with a filter membrane base 211a for placing the filter membrane 3, and a filtered liquid collection chamber 221 is formed between the filter membrane base 211a and the bottom of the measuring container 2.

[0035] During use, place the filter membrane 3 to be tested on the filter membrane base 211a. Prepare the water treatment agent solution according to requirements and introduce the prepared solution into the liquid storage chamber 13 of the constant pressure container 1 through the liquid inlet 12. After the solution addition is completed, close the liquid inlet valve 121 and open the air inlet valve 111. Then, constant pressure gas can be introduced from the air inlet 11. After the pressure reaches a certain value, open the connection valve 14. Under the pressure driving action of the constant pressure gas under a certain pressure condition, the solution penetrates through the membrane pores of the filter membrane 3 and enters the filtrate collection chamber 221 of the measurement container 2. By measuring the amount of solution entering the measurement container 2, the amount of the water treatment agent solution that penetrates through the filter membrane 3 per unit time can be obtained. By comparing the differences in the amounts of the water treatment agent solution that penetrate through the filter membrane 3 per unit time, the influence of this water treatment solution on the selected filter membrane 3 can be evaluated. The test device for the compatibility of the water treatment agent and the filter membrane provided by the embodiments of the present disclosure has a simple structure and can be used to quickly evaluate the compatibility of a variety of different or different concentrations of water treatment agents with the selected filter membrane 3.

[0036] The method for measuring the amount of solution entering the measurement container 2 can be obtained by measuring the volume of the solution entering the measurement container 2 or weighing the weight of the solution entering the measurement container 2.

[0037] The filter membrane 3 can be directly placed on the filter membrane base 211a, or installed on the filter membrane base 211a, or snapped onto the filter membrane base 211a. After the filter membrane 3 is placed, no solution will pass between the filter membrane 3 and the filter membrane base 211a, or there will be no gap after the filter membrane 3 abuts against the measurement container 2, and the solution will not pass through the abutting part between the filter membrane 3 and the measurement container 2. In other words, after the filter membrane 3 is installed on the filter membrane base 211a, the solution can only penetrate through the membrane pores of the filter membrane 3.

[0038] It should be noted that the filter membrane 3 is a membrane pore filter membrane 3 selected according to the test requirements. Such filter membranes 3 include but are not limited to water treatment filter membranes such as microfiltration membranes, ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes, or electrodialysis membranes.

[0039] It also should be noted that the selected constant pressure gas can be compressed air, nitrogen, or other gases. The pressure range of the constant pressure gas is 0 to 10 MPa, which is specifically determined according to the types of the water treatment agent and the tested filter membrane 3. The gas source can be a compressed gas cylinder, an air compressor, or a gas booster fan, etc.

[0040] Optionally, the air inlet 11 and the liquid inlet 12 are arranged at the top of the constant pressure container 1 so that more solution can be introduced into the liquid storage chamber 13.

[0041] Generally speaking, the less the amount of filtrate collected per unit time, the more seriously the water treatment agent at this concentration affects the filtration performance of the filtration membrane 3, indicating that the water treatment agent at this concentration has poor compatibility with the tested filtration membrane 3. The more the amount of filtrate collected per unit time, the better the beneficial effect or the smaller the adverse effect of the water treatment agent solution at this concentration on the filtration membrane 3, and the more conducive it is for the filtration membrane 3 to exert its filtration performance, indicating that the water treatment agent at this concentration has better compatibility with the tested filtration membrane 3.

[0042] The constant pressure container 1 and the measuring container 2 are detachably connected, which is convenient for installing or placing the filtration membrane 3. And when a certain part of the constant pressure container 1 and the measuring container 2 is damaged and needs to be replaced, only the damaged part needs to be replaced, and the undamaged parts can continue to be used, saving the replacement cost.

[0043] In some specific embodiments, the constant pressure container 1 has an air inlet 11 for introducing constant pressure gas, and the air inlet 11 communicates with the liquid storage chamber 13. During use, place the filtration membrane 3 to be tested on the filtration membrane base 211a, and prepare the water treatment agent solution according to requirements. Then, introduce the prepared solution into the constant pressure container 1 from the liquid inlet 12, close the liquid inlet valve 121, and then introduce constant pressure gas from the air inlet 11. After the pressure reaches a certain value, open the connection valve 14. Under the pressure driving action of the constant pressure gas under a certain pressure condition, the solution penetrates through the membrane pores of the filtration membrane 3 and enters the measuring container 2. The liquid inlet 12 is provided with a liquid inlet valve 121. After adding the prepared solution into the constant pressure container 1 from the liquid inlet 12, the liquid inlet valve 121 can be closed, and constant pressure gas can be continuously introduced to keep the constant pressure container 1 at a constant pressure.

[0044] In some specific embodiments, the measuring container 2 is provided with a discharge port 222, and the discharge port 222 communicates with the filtrate collection chamber 221. When the solution penetrates through the membrane pores of the filtration membrane 3 and enters the measuring container 2 under the pressure driving action of the constant pressure gas under a certain pressure condition, when measuring the amount of liquid entering the measuring container 2, the solution entering the measuring container 2 can be poured from the discharge port 222 into a measuring cylinder for volume measurement, or the solution entering the measuring container 2 can be poured from the discharge port 222 into other containers to measure the volume or weigh the weight, improving the convenience of measurement.

[0045] Optionally, a discharge valve can be provided at the discharge port 222.

[0046] In some specific embodiments, the constant-pressure container 1 and the measuring container 2 are connected by threads, or the constant-pressure container 1 and the measuring container 2 are connected by a Koppling, or the constant-pressure container 1 and the measuring container 2 are connected by a detachable clamp, or the constant-pressure container 1 and the measuring container 2 are connected by other detachable fixtures. When one of the constant-pressure container 1 and the measuring container 2 is damaged and needs to be replaced, only the damaged part needs to be replaced, and the undamaged part can continue to be used, saving the replacement cost.

[0047] In some specific embodiments, the measuring container 2 includes a filtrate collection container 22 and a connecting member 21. The filtrate collection chamber 221 is located in the filtrate collection container 22. The filtrate collection container 22 and the connecting member 21 are detachably connected. One end of the connecting member 21 away from the filtrate collection container 22 is detachably connected to the constant-pressure container 1. Among them, the connecting member 21 is formed with a channel 211 communicating the constant-pressure container 1 and the filtrate collection container 22, and a filter membrane base 211a is arranged in the channel 211. The connecting member 21 is detachably connected to the constant-pressure container 1 and the filtrate collection container 22 respectively, which is convenient for installing or placing the filter membrane 3. And when one of the connecting member 21, the constant-pressure container 1 and the filtrate collection container 22 is damaged and needs to be replaced, only the damaged part needs to be replaced, and the undamaged part can continue to be used, saving the replacement cost.

[0048] During use, the filter membrane 3 to be tested is placed on the filter membrane base 211a. The water treatment agent solution is prepared according to requirements. The prepared solution is introduced into the constant-pressure container 1 from the liquid inlet 12. After the solution addition is completed, the liquid inlet valve 121 is closed and the air inlet valve 111 is opened. Then, constant-pressure gas can be introduced from the air inlet 11. After the pressure reaches a certain value, the connection valve 14 is opened. Under the pressure driving action of the constant-pressure gas under a certain pressure condition, the solution penetrates through the membrane pores of the filter membrane 3 and enters the filtrate collection container 22. By measuring the amount of the solution entering the filtrate collection container 22, the amount of the water treatment agent solution penetrating through the filter membrane 3 per unit time can be obtained. By comparing the differences in the amounts of the water treatment agent solution penetrating through the filter membrane 3 per unit time, the influence of this water treatment solution on the selected filter membrane 3 can be evaluated.

[0049] The discharge port 222 is arranged on the filtrate collection container. The solution entering the filtrate collection container 22 can be poured from the discharge port 222 into a measuring cylinder for volume measurement, or the solution entering the filtrate collection container 22 can be poured from the discharge port 222 into other containers to measure the volume or weigh the weight, improving the measurement accuracy.

[0050] In some specific embodiments, the connecting member 21 includes a protrusion provided on the inner wall of the channel 211. The protrusion extends along the circumferential direction of the inner wall, with a simple structure and facilitating the installation of the filter membrane 3. It should be noted that after the filter membrane 3 is installed, the filter membrane 3 covers the protrusion, and there is no gap for the solution to pass between the filter membrane 3 and the channel 211 of the connecting member 21. The solution can only pass through the pores of the filter membrane 3.

[0051] In some specific embodiments, the measuring container 2 is made of a transparent material, and the measuring container 2 is provided with scale lines 223. The method for measuring the amount of solution entering the measuring container 2 can be obtained by directly reading the scale lines 223 on the measuring container 2. It has a simple structure, is used for quickly measuring the volume of the filtrate, can be used for quickly evaluating the compatibility of various different or different concentrations of water treatment agents with the selected filter membrane 3, and improves the convenience of measurement.

[0052] In some specific embodiments, the filtrate collection container 22 is made of a transparent material, and the filtrate collection container 22 is provided with scale lines 223. The method for measuring the amount of solution entering the filtrate collection container 22 can be obtained by directly reading the scale lines 223 on the filtrate collection container 22. It has a simple structure, is used for quickly measuring the volume of the filtrate, can be used for quickly evaluating the compatibility of various different or different concentrations of water treatment agents with the selected filter membrane 3, and improves the convenience of measurement.

[0053] In some specific embodiments, the connecting member 21 is respectively connected to the filtrate collection container 22 and the constant pressure container 1 by screw threads, or the connecting member 21 is respectively connected to the filtrate collection container 22 and the constant pressure container 1 by a KF flange, or the connecting member 21 is respectively connected to the filtrate collection container 22 and the constant pressure container 1 by a detachable clamp. When one of the connecting member 21, the filtrate collection container 22, and the constant pressure container 1 is damaged and needs to be replaced, only the damaged part needs to be replaced, and the undamaged parts can continue to be used, saving the replacement cost.

[0054] The embodiments of the present disclosure provide a method for testing the compatibility of a water treatment agent and a filter membrane, including the following steps:

[0055] Step S1: Place the filter membrane 3 to be tested into the filter membrane base 211a, and introduce the solution to be tested into the liquid storage chamber 13 of the constant pressure container 1. After the solution addition is completed, close the liquid inlet valve 121. Step S2: Open the gas inlet valve 111 to introduce constant pressure gas into the liquid storage chamber 13 of the constant pressure container 1. Step S3: When the constant pressure container 1 reaches the preset pressure, open the connection valve 14 and continuously introduce constant pressure gas to ensure a constant filtration pressure. Step S4: Measure the volume or weight of the liquid entering the measurement container 2 per unit time. Specifically, place the filter membrane 3 to be tested on the filter membrane base 211a, prepare the water treatment agent solution as required, and introduce the prepared solution into the constant pressure container 1 from the liquid inlet 12. After the solution addition is completed, close the liquid inlet valve 121 and open the gas inlet valve 111. Then, constant pressure gas can be introduced from the gas inlet 11. After the pressure reaches a certain value, open the connection valve 14. Under the pressure driving action of the constant pressure gas under a certain pressure condition, the solution penetrates through the pores of the filter membrane 3 and enters the measurement container 2. By measuring the amount of the solution entering the measurement container 2, the amount of the water treatment agent solution penetrating through the filter membrane 3 per unit time can be obtained. By comparing the differences in the amounts of the water treatment agent solution penetrating through the filter membrane 3 per unit time, the influence of this water treatment solution on the selected filter membrane 3 can be evaluated. The method for obtaining the amount of the solution in the measurement container 2 can be the volume measurement method or the weighing method. This method can be used to quickly evaluate the compatibility of various different or different concentrations of water treatment agents with the selected filter membrane 3.

[0056] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0057] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test device for the compatibility between a water treatment agent and a filtration membrane, characterized in that, it includes: A constant pressure container (1) having a liquid inlet (12) for introducing liquid; A measuring container (2) detachably connected to the constant pressure container (1); Wherein, a communication valve (14) is provided on the constant pressure container (1), a liquid storage cavity (13) is formed between the communication valve (14) and the top of the constant pressure container (1), the liquid inlet (12) communicates with the liquid storage cavity (13), the measuring container (2) is provided with a filtration membrane base (211a) for placing a filtration membrane (3), and a filtrate collection cavity (221) is formed between the filtration membrane base (211a) and the bottom of the measuring container (2); The measuring container (2) includes a filtrate collection container (22) and a connecting member (21), the filtrate collection cavity (221) is located in the filtrate collection container (22), the filtrate collection container (22) and the connecting member (21) are detachably connected, and one end of the connecting member (21) away from the filtrate collection container (22) is detachably connected to the constant pressure container (1); Wherein, the connecting member (21) forms a channel (211) communicating the constant pressure container (1) and the filtrate collection container (22), and the filtration membrane base (211a) is arranged in the channel (211); The connecting member (21) includes a protrusion provided on the inner wall of the channel (211), and the protrusion extends along the circumferential direction of the inner wall; The filtration membrane (3) is arranged on the protrusion and covers the protrusion; The filtrate collection container (22) is made of a transparent material, and the filtrate collection container (22) is provided with scale lines (223); In the direction where the filtrate enters the measuring container (2) from the constant pressure container (1), the cross-sectional dimension of the channel (211) first increases and then decreases, and the protrusion is located at the position where the cross-sectional dimension of the channel (211) is the largest.

2. The test device for the compatibility between a water treatment agent and a filtration membrane according to claim 1, characterized in that, The constant pressure container (1) has an air inlet (11) for introducing constant pressure gas, the air inlet (11) communicates with the liquid storage cavity (13), and the air inlet (11) is provided with an air inlet valve (111).

3. The test device for the compatibility between a water treatment agent and a filtration membrane according to claim 1, characterized in that, The liquid inlet (12) is provided with a liquid inlet valve (121).

4. The test device for the compatibility between a water treatment agent and a filtration membrane according to claim 1, characterized in that, The measuring container (2) is provided with a discharge port (222), and the discharge port (222) communicates with the filtrate collection cavity (221).

5. The test device for the compatibility between a water treatment agent and a filtration membrane according to claim 1, characterized in that, The constant pressure container (1) and the measuring container (2) are connected by threads; Or, the constant pressure container (1) and the measuring container (2) are connected by a coupling; Or, the constant pressure container (1) and the measuring container (2) are connected by a detachable clamp.

6. The test device for the compatibility between a water treatment chemical and a filtration membrane according to claim 1, characterized in that, the connecting member (21) is threadedly connected to the filtrate collection container (22) and the constant pressure container (1) respectively; or, the connecting member (21) is connected to the filtrate collection container (22) and the constant pressure container (1) respectively by a KF joint; or, the connecting member (21) is connected to the filtrate collection container (22) and the constant pressure container (1) respectively by a detachable clamp.

7. A test method for the compatibility between a water treatment chemical and a filtration membrane using the test device for the compatibility between a water treatment chemical and a filtration membrane according to any one of claims 1 to 6, characterized in that, it includes the following steps: Step S1: Place the filtration membrane to be tested (3) in the filtration membrane base (211a), introduce the solution to be tested into the liquid storage chamber (13) of the constant pressure container (1), and close the liquid inlet valve (121) after the addition of the solution is completed; Step S2: Open the air inlet valve (111) to introduce constant pressure gas into the liquid storage chamber (13) of the constant pressure container (1); Step S3: When the constant pressure container (1) reaches the preset pressure, open the connection valve (14) and continue to introduce constant pressure gas to ensure a constant filtration pressure; Step S4: Measure the volume or weight of the liquid entering the measuring container (2) per unit time.

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