Flat sheet membrane testing system

Abstract

The utility model relates to the technical field of water treatment, and provides a flat sheet membrane testing system which comprises a stock solution tank, a membrane pool, a first pressure gauge, a regulating valve and a liquid supply pump, the membrane tank is provided with an inlet, a water producing port and a concentrated water port, the raw liquid tank is communicated with the inlet end of the liquid supply pump, the outlet end of the liquid supply pump is communicated with the inlet of the membrane tank, the first pressure gauge is selectively arranged on the inlet side or the concentrated water port side, and the concentrated water port is communicated with the raw liquid tank; and the regulating valve is mounted on a pipeline for communicating the concentrated water port with the stock solution tank, and is used for regulating the pressure in the pipeline under the condition that the flow of the pipeline is not changed. According to the flat sheet membrane testing system disclosed by the utility model, the liquid supply pump cannot be damaged while the system pressure is changed, so that the frequent adjustment of each part of the testing system is avoided, and the convenient and safe adjustment of the testing system under different pressures is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a flat membrane testing system. Background Art

[0002] In the flat-plate membrane test experiment, a membrane and a pressure plate are installed in the membrane pool. The raw water entering the membrane pool is fully filtered through the nano-level filtration of the membrane and the micron-level filtration of the pressure plate. The purpose of the flat-plate membrane test is to test the water production under different water qualities and different pressures.

[0003] Currently, pressure regulation of flat membrane systems is mainly achieved by adjusting the opening of a needle valve. Adjusting the opening will cause changes in the flow rate in the pipeline. The liquid supply pump needs to provide high pressure to enable the raw water to pass through the membrane and the pressure plate. Therefore, a positive displacement pump is commonly used. The flow rate of a positive displacement pump is only related to the operating frequency of the pump. Changing the system flow rate through a needle valve can easily damage the components in the positive displacement pump and cause unstable system pressure. Utility Model Content

[0004] The utility model provides a flat membrane testing system, which is used to solve the problem in the prior art that a needle valve is used to adjust the system pressure, thereby damaging a displacement pump and causing unstable system pressure.

[0005] The utility model provides a flat membrane testing system, comprising: a raw liquid tank, a membrane pool, a first pressure gauge, a regulating valve and a liquid supply pump;

[0006] The membrane pool has an inlet, a water outlet and a concentrated water outlet. The raw liquid tank is connected to the inlet end of the liquid supply pump, and the outlet end of the liquid supply pump is connected to the inlet of the membrane pool. The first pressure gauge can be selectively arranged on the inlet side or the concentrated water outlet side. The concentrated water outlet is connected to the raw liquid tank.

[0007] The regulating valve is installed on the pipeline connecting the concentrated water outlet and the raw liquid tank, and the regulating valve is used to adjust the pressure in the pipeline without changing the flow rate of the pipeline.

[0008] According to a flat membrane testing system provided by the utility model, a plurality of membrane pools are provided, and the plurality of membrane pools are arranged in parallel between the liquid supply pump and the raw liquid tank.

[0009] According to a flat membrane testing system provided by the utility model, at least two of the membrane pools are of different types.

[0010] According to a flat membrane testing system provided by the present invention, the regulating valve includes a back pressure valve.

[0011] According to a flat membrane testing system provided by the utility model, the regulating valve further comprises: a needle valve;

[0012] The needle valve is installed between the concentrated water port and the back pressure valve.

[0013] According to the utility model, a flat membrane testing system is provided, which also includes a flow meter and a frequency converter;

[0014] The flow meter is provided on the connecting pipe between the regulating valve and the raw liquid tank, and the frequency converter is electrically connected to the liquid supply pump;

[0015] The frequency converter is used to change the liquid flow in the delivery pipeline of the liquid supply pump.

[0016] According to the utility model, a flat membrane testing system is provided, which further includes: a second pressure gauge;

[0017] In the case where the first pressure gauge is provided at the inlet side, the second pressure gauge is provided at the concentrate outlet side;

[0018] In the case where the first pressure gauge is provided on the concentrated water outlet side, the second pressure gauge is provided on the inlet side.

[0019] According to the utility model, a flat membrane testing system is provided, which further includes: a pressure relief valve;

[0020] The pressure relief valve is arranged at the inlet end of the raw liquid tank.

[0021] According to the utility model, a flat membrane testing system is provided, which further includes: a shut-off valve;

[0022] The shut-off valve is arranged between the liquid supply pump and the membrane pool.

[0023] According to the utility model, a flat membrane testing system is provided, which further includes: a bracket;

[0024] The bracket includes a frame and universal wheels;

[0025] The raw liquid tank, the membrane pool, the first pressure gauge, the regulating valve and the liquid supply pump are all arranged on the vehicle frame.

[0026] The flat membrane testing system provided by the present invention is provided with a raw liquid tank, a membrane pool, a first pressure gauge, a regulating valve and a liquid supply pump. The regulating valve adjusts the pressure in the pipeline without changing the flow rate of the pipeline, and uses the first pressure gauge to collect pressure information in the pipeline, so that the regulating valve can be adjusted according to the reading of the first pressure gauge, and then the pressure in the testing system can be adjusted, so that the pressure will not be damaged when changing, the frequent adjustment of various components of the testing system is avoided, and the convenient and safe adjustment of the testing system under different pressures is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a front view of the flat membrane testing system provided by the utility model.

[0029] Figure 2 It is a side view of the flat membrane testing system provided by the utility model.

[0030] Figure 3 It is a top view of the flat membrane testing system provided by the utility model.

[0031] Reference numerals:

[0032] 1. Raw liquid tank;

[0033] 2. Membrane pool; 21. Inlet; 22. Water outlet; 23. Concentrate outlet;

[0034] 3. First pressure gauge;

[0035] 4. Regulating valve; 41. Back pressure valve; 42. Needle valve;

[0036] 5. Liquid supply pump; 6. Flow meter;

[0037] 7. Distribution box; 71. Frequency converter;

[0038] 8. Pressure relief valve; 9. Shut-off valve;

[0039] 100. Bracket; 1001. Frame; 1002. Universal wheel. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] The following combination Figure 1-Figure 3 , the flat membrane testing system provided by the embodiment of the utility model is described in detail through specific embodiments and application scenarios.

[0042] In some embodiments, as Figure 1、 Figure 2 and Figure 3 As shown, this embodiment provides a flat membrane testing system, including: a raw liquid tank 1, a membrane pool 2, a first pressure gauge 3, a regulating valve 4 and a liquid supply pump 5.

[0043] The membrane pool 2 has an inlet 21, a water production port 22 and a concentrated water port 23. The raw liquid tank 1 is connected to the inlet end of the liquid supply pump 5, and the outlet end of the liquid supply pump 5 is connected to the inlet 21 of the membrane pool 2. The first pressure gauge 3 can be selectively arranged on the side of the inlet 21 or the concentrated water port 23. The concentrated water port 23 is connected to the raw liquid tank 1.

[0044] The regulating valve 4 is installed on the pipeline connecting the concentrated water outlet 23 and the raw liquid tank 1. The regulating valve 4 is used to adjust the pressure in the pipeline without changing the flow rate of the pipeline.

[0045] It is understandable that in sewage treatment, raw water containing pollutants is passed into the membrane pool 2, filtered by the membrane and pressure plate in the membrane pool 2, clean water is discharged from the water outlet 22, and concentrated water containing pollutants is discharged from the concentrated water outlet 23. In the test system, the clean water discharged from the water outlet 22 is sent to the balance for weighing, and the concentrated water outlet 23 is connected to the raw liquid tank 1, so that the liquid supply pump 5, the membrane pool 2 and the liquid supply pump 5 form a cycle to reuse the contaminated water, and the membrane in the membrane pool 2 is tested to detect the water production of the membrane under different water qualities and different pressures to draw conclusions about the filtration performance of the membrane.

[0046] The membrane pools 2 of this embodiment all use flat membranes, which may be polymer organic membranes, inorganic membranes, microfiltration membranes, or ultrafiltration membranes.

[0047] Raw water is stored in the raw liquid tank 1, and the first pressure gauge 3 is used to detect the pressure in the pipeline system formed between the concentrated water outlet 23 and the raw liquid tank 1. The first pressure gauge 3 can be installed on the inlet 21 side of the membrane pool 2, or on the concentrated water outlet 23 side of the membrane pool 2. The pressure difference between the inlet 21 side and the concentrated water outlet 23 side is small, and both positions can represent the pressure in the pipeline system.

[0048] Since the test system needs to detect the water production of the membrane under different pressures, it is necessary to frequently adjust the pressure in the pipeline to test the filtration capacity of the membrane under different pressures. The regulating valve 4 is used to adjust the pressure in the pipeline so that the pressure of the raw water entering the membrane pool 2 changes. Since the membrane and the pressure plate in the membrane pool 2 both produce resistance to the raw water, the raw water needs to provide a certain pressure from the inlet 21 to the concentrated water outlet 23 to overcome the local resistance of the membrane pool 2. Therefore, the liquid supply pump 5 used in the test system needs to select a positive displacement pump that can provide pressure. The design flow rate of the positive displacement pump is only related to the frequency and does not change with the change of pressure. Therefore, when the regulating valve 4 adjusts the pipeline pressure in the test system, it cannot change the pressure by changing the flow rate. Therefore, the regulating valve 4 of this embodiment does not change the flow rate of the pipeline when changing the pipeline pressure.

[0049] Specifically, the regulating valve 4 can be a solenoid valve, a diaphragm valve or a back pressure valve 41 , all of which regulate the pressure without regulating the valve 4 door opening, thereby regulating the pressure without changing the flow in the pipeline.

[0050] Compared with using the needle valve 42 to adjust the system pressure, the change in the opening of the needle valve 42 will affect the flow in the pipeline, and the adjustment range of the needle valve 42 is narrow, and the adjustment of the opening is not sensitive, which will cause the flow to not change linearly relative to the opening of the needle valve 42, causing the flow in the pipeline to suddenly reach a peak, causing the system pressure to change greatly, and the flow change is too large, which will damage the internal structure of the volumetric pump. The regulating valve 4 used in this embodiment only adjusts the pipeline pressure and does not change the pipeline flow. It can make the pressure change slowly, which is beneficial to the stability of the system pressure.

[0051] The flat membrane testing system provided by the present invention is provided with a raw liquid tank 1, a membrane pool 2, a first pressure gauge 3, a regulating valve 4 and a liquid supply pump 5. The regulating valve 4 adjusts the pressure in the pipeline without changing the flow rate of the pipeline, and uses the first pressure gauge 3 to collect the pressure information in the pipeline, so that the regulating valve 4 can be adjusted according to the reading of the first pressure gauge 3, and then the pressure in the testing system can be adjusted, so that the pressure will not be damaged when changing the pressure, thereby avoiding frequent adjustment of various components of the testing system and realizing convenient and safe adjustment of the testing system under different pressures.

[0052] In some embodiments, as Figure 1 As shown, in this embodiment, a plurality of membrane pools 2 are provided, and the plurality of membrane pools 2 are arranged in parallel between the liquid supply pump 5 and the raw liquid tank 1 .

[0053] It is understandable that in order to improve the efficiency of sewage treatment, multiple membrane pools 2 can be set in parallel, which increases the processing capacity of the entire test system without affecting the performance of a single membrane pool 2. Each membrane pool 2 can filter pollutants individually, ensuring that the effluent water quality of the test system is stable and meets higher standards. Moreover, when a membrane pool 2 needs maintenance, it does not affect the sewage treatment of other membrane pools 2.

[0054] Specifically, multiple membrane pools 2 can be flexibly selected according to the sewage treatment volume and treatment requirements, and the types of membrane pools 2 can be selected to be the same, different, or partially the same and partially different.

[0055] In some embodiments, as Figure 1 As shown, the types of at least two membrane pools 2 in this embodiment are different.

[0056] It is understandable that different types of membrane pools 2 have different requirements for water quality, types of pollutants filtered, and treatment accuracy of pollutants. Selecting different types of membrane pools 2 can balance factors such as sewage treatment needs, water quality characteristics, and economy. By combining the advantages of each membrane pool 2, the flat membrane test system can be applied to more sewage treatment occasions.

[0057] Specifically, in this embodiment, four membrane pools 2 are selected for parallel arrangement, three of which are the same membrane pools 2 , and the remaining membrane pool 2 is of a different type from the other membrane pools 2 .

[0058] In some embodiments, as Figure 1 As shown, the regulating valve 4 of this embodiment includes a back pressure valve 41 .

[0059] It can be understood that the back pressure valve 41 controls the opening and closing of the valve through the internal spring and diaphragm. When the system pressure is lower than the set value, the spring will tightly close the diaphragm to prevent the fluid from flowing. When the system pressure is greater than the set value, the fluid pressure will push the diaphragm, open the valve, and allow the fluid to pass.

[0060] The back pressure valve 41 does not regulate the pressure in the system pipeline by adjusting the valve opening. That is, while the back pressure valve 41 regulates the system pressure, it does not change the flow in the system. Moreover, the back pressure valve 41 regulates the system pressure evenly and slowly, and the pressure control in the test system can be stably and evenly regulated.

[0061] In some embodiments, as Figure 2 and Figure 3 As shown, the regulating valve 4 of this embodiment further includes a needle valve 42 .

[0062] The needle valve 42 is installed between the concentrate port 23 and the back pressure valve 41 .

[0063] It is understandable that each back pressure valve 41 in the system is equipped with a needle valve 42. When multiple membrane pools 2 are arranged in parallel, if different pressures are required in each membrane pool 2, the opening of the needle valve 42 can be adjusted to change the flow rate of raw water in each membrane pool 2 to adjust the pressure in each membrane pool 2. However, since the total flow rate of multiple membrane pools 2 in the entire system has not changed, it does not affect the normal operation of the positive displacement pump. This allows the pressure in each membrane pool 2 to be flexibly adjusted while ensuring the safe operation of the positive displacement pump, thereby enabling the filtration performance of the membrane in each membrane pool 2 to be tested separately, as well as the water production at different pressures, thereby improving the testing flexibility of multiple membrane pools 2 and the testing efficiency of the flat membrane testing system.

[0064] In some embodiments, as Figure 1 As shown, the flat membrane testing system of this embodiment further includes a flow meter 6 and a frequency converter 71 .

[0065] The flow meter 6 is provided on the connecting pipe between the regulating valve 4 and the raw liquid tank 1 , and the frequency converter 71 is electrically connected to the liquid supply pump 5 .

[0066] The frequency converter 71 is used to change the liquid flow rate in the delivery pipeline of the liquid supply pump 5 .

[0067] It is understandable that when it is necessary to adjust the flow rate of the pipeline in the system, since the back pressure valve 41 cannot adjust the flow rate, the frequency of the liquid supply pump 5 can be changed by the frequency converter 71, thereby changing the delivery flow rate of the liquid supply pump 5, and the flow rate of the system is only positively correlated with the frequency of the liquid supply pump 5, and there is no need to adjust other valve components, which saves adjustment time, reduces the difficulty of adjustment, and realizes convenient adjustment of the liquid flow in the delivery pipeline.

[0068] The flow meter 6 can collect flow information in the delivery pipeline, provide timely feedback on the effect of the frequency change of the frequency converter 71, and intuitively reflect the flow regulation in the delivery pipeline.

[0069] This embodiment provides a flow meter 6 and a frequency converter 71 to change the frequency of the displacement pump to change the flow rate in the system delivery pipeline, and the flow meter 6 is used for intuitive characterization, making the system's flow adjustment simple and intuitive.

[0070] In some embodiments, the flat membrane testing system of this embodiment further includes: a second pressure gauge.

[0071] When the first pressure gauge 3 is provided on the inlet 21 side, the second pressure gauge is provided on the concentrate outlet 23 side.

[0072] When the first pressure gauge 3 is provided on the concentrated water port 23 side, the second pressure gauge is provided on the inlet 21 side.

[0073] It is understandable that in this embodiment, a second pressure gauge is provided, and the first pressure gauge 3 and the second pressure gauge are respectively arranged on both sides of the membrane pool 2, so that the pressure on both sides of the membrane pool 2 can be detected. In actual applications, the pipeline pressure of the system takes the average value of the readings of the first pressure gauge 3 and the second pressure gauge, so that the pressure of the membrane pool 2 is obtained more accurately and the test effect is better.

[0074] In some embodiments, as Figure 1 and Figure 3 As shown, the flat membrane testing system of this embodiment further includes: a pressure relief valve 8.

[0075] The pressure relief valve 8 is provided at the inlet end of the raw liquid tank 1 .

[0076] It is understandable that when the flat membrane test system is repaired, cleaned or preserved, the raw water in the test system needs to be discharged into the raw liquid tank 1 so that the pipeline is in an empty state. However, since the raw water is in a high-pressure state, it cannot be directly discharged into the raw liquid tank 1 and needs to be pressure-relieved. In this embodiment, a pressure relief valve 8 is provided at the inlet end of the raw liquid tank 1 to slowly release the pressure in the pipeline to return the raw water to the raw liquid tank 1 to prevent the raw liquid tank 1 from being damaged by pressure shock.

[0077] Specifically, the pressure relief valve 8 of this embodiment is a needle valve 42 , which can adjust its opening to allow the raw water to pass slowly, thereby achieving safe transportation of the raw water while relieving pressure.

[0078] In some embodiments, as Figure 2 and Figure 3 As shown, the flat membrane testing system of this embodiment further includes: a shut-off valve 9 .

[0079] The shut-off valve 9 is provided between the liquid supply pump 5 and the membrane pool 2 .

[0080] It is understandable that the shut-off valve 9 can shut off the pipeline, cutting off the raw water supply from the raw liquid tank 1 to the membrane pool 2, so that when the pipeline between the liquid supply pump 5 and the membrane pool 2 needs to be replaced, it can be achieved by opening and closing the shut-off valve 9, which increases the convenience of maintenance of the liquid supply pump 5 and the membrane pool 2.

[0081] Specifically, the shut-off valve 9 may be a ball valve.

[0082] In some embodiments, as Figure 1 As shown, the flat membrane testing system of this embodiment further includes: a bracket 100 .

[0083] The bracket 100 includes a frame 1001 and universal wheels 1002 .

[0084] The raw liquid tank 1 , the membrane pool 2 , the first pressure gauge 3 , the regulating valve 4 and the liquid supply pump 5 are all arranged on the frame 1001 .

[0085] It is understandable that in order to facilitate the testing of flat membranes for different sewage, this embodiment sets the test system in a movable form. The raw liquid tank 1, membrane pool 2, first pressure gauge 3, regulating valve 4 and liquid supply pump 5 are carried by the frame 1001, and the universal wheel 1002 can drive the frame 1001 to move, so that when the test system needs to be moved to a different position, the frame 1001 can be pushed relatively effortlessly, avoiding the increase in the workload of the operator due to transportation.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A flat membrane testing system, characterized in that: include: Raw liquid tank, membrane tank, first pressure gauge, regulating valve and liquid supply pump; The membrane pool has an inlet, a water outlet and a concentrated water outlet. The raw liquid tank is connected to the inlet of the liquid supply pump, and the outlet of the liquid supply pump is connected to the inlet of the membrane pool. The first pressure gauge can be selectively arranged on the inlet side or the concentrated water outlet side. The concentrated water outlet is connected to the raw liquid tank. The regulating valve is installed on the pipeline connecting the concentrated water outlet and the raw liquid tank, and the regulating valve is used to adjust the pressure in the pipeline without changing the flow rate of the pipeline.

2. The flat membrane testing system according to claim 1, characterized in that: There are multiple membrane pools, and the multiple membrane pools are arranged in parallel between the liquid supply pump and the raw liquid tank.

3. The flat membrane testing system according to claim 2, characterized in that: At least two of the membrane pools are of different types.

4. The flat membrane testing system according to claim 1, characterized in that: The regulating valve includes a back pressure valve.

5. The flat membrane testing system according to claim 4, characterized in that: The regulating valve further comprises: a needle valve; The needle valve is installed between the concentrated water port and the back pressure valve.

6. The flat membrane testing system according to claim 1, characterized in that: Also includes flow meter and frequency converter; The flow meter is provided on the connecting pipe between the regulating valve and the raw liquid tank, and the frequency converter is electrically connected to the liquid supply pump; The frequency converter is used to change the liquid flow in the delivery pipeline of the liquid supply pump.

7. The flat membrane testing system according to claim 1, characterized in that: Also includes: Second pressure gauge; In the case where the first pressure gauge is provided at the inlet side, the second pressure gauge is provided at the concentrate outlet side; In the case where the first pressure gauge is provided on the concentrated water outlet side, the second pressure gauge is provided on the inlet side.

8. The flat membrane testing system according to claim 1, characterized in that: Also includes: pressure relief valve; The pressure relief valve is arranged at the inlet end of the raw liquid tank.

9. The flat membrane testing system according to any one of claims 1 to 8, characterized in that: Also includes: Shut-off valve; The shut-off valve is arranged between the liquid supply pump and the membrane pool.

10. The flat membrane testing system according to any one of claims 1 to 8, characterized in that: Also includes: Bracket; The bracket includes a frame and universal wheels; The raw liquid tank, the membrane pool, the first pressure gauge, the regulating valve and the liquid supply pump are all arranged on the vehicle frame.

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