Rigid flat sheet membrane testing device

Abstract

The utility model provides a rigid flat sheet membrane testing device which comprises a testing pool used for accommodating a flat sheet membrane; a pool; the test channel comprises a first valve, a suction pump, a flowmeter and a second valve which are sequentially connected through a pipeline, an inlet of the first valve is connected with the flat sheet membrane, and an outlet of the second valve is connected with the water pool; an outlet of the first valve is connected with a third valve, the third valve is connected with a discharge port of the water tank, and a fourth valve is arranged between an inlet of the first valve and an outlet of the flowmeter; when the first valve, the suction pump and the second valve are opened, the first valve, the suction pump, the flowmeter and the second valve are communicated with the flat sheet membrane and the water tank to form a membrane flux test channel; and when the third valve, the suction pump and the fourth valve are opened, the third valve, the suction pump, the flowmeter and the fourth valve are communicated with the discharge port and the flat sheet membrane group integrity test channel. By adopting the testing device, the membrane flux test and the integrity test of the flat sheet membrane are realized through the same testing device, and the testing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of membrane bioreactors, and in particular relates to a rigid flat membrane testing device. Background Art

[0002] The submerged membrane bioreactor (MBR) is an organic combination of membrane separation technology and biotechnology. It uses ultrafiltration or microfiltration membrane separation technology to replace the secondary sedimentation tank and conventional filtration unit of the traditional activated sludge method, so that the hydraulic retention time (HRT) and sludge age (STR) are completely separated. This is an efficient and economical sewage resource technology with efficient solid-liquid separation capabilities. Not only is the effluent water quality good, the suspended solids and turbidity are close to zero, but it can also intercept biological pollutants such as Escherichia coli. And because the effluent water quality is significantly better than the traditional sewage treatment process, the treated water can be directly reused, and it has a wide range of application prospects.

[0003] The flat membrane module is the core component of the submerged membrane bioreactor, and its reliable stability directly determines the application effect of the membrane bioreactor. The flat membrane is the water-producing component of the flat membrane module and an important component of the flat membrane module. The performance of the flat membrane directly determines the performance of the flat membrane module; the flat membrane needs to be tested for membrane flux to test whether the membrane flux meets the water production requirements, and the flat membrane needs to be tested for integrity to test whether the maximum pressure it can withstand during chemical backwashing can meet the requirements. The existing membrane flux test and integrity test are performed on different test devices. After completing the membrane flux test, the flat membrane needs to be disassembled and then installed on the integrity test device, which has low test efficiency and high test cost.

[0004] Therefore, it is necessary to provide a testing device for a rigid flat membrane to solve or at least partially solve the above problems. Utility Model Content

[0005] The utility model provides a rigid flat membrane testing device, which realizes the membrane flux test and integrity test of the flat membrane through the same testing device, thereby improving the test efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A rigid flat membrane testing device, comprising:

[0008] A test tank, used to accommodate the flat membrane and allow the flow of test sewage for membrane flux testing;

[0009] A water tank, used to hold the produced water of the flat membrane or the test water;

[0010] A test passage, comprising a first valve, a suction pump, a flow meter and a second valve connected in sequence through a pipeline, wherein an inlet of the first valve is connected to the flat membrane, and an outlet of the second valve is connected to the water pool; a third valve is connected to the outlet of the first valve, and the third valve is connected to the discharge port of the water pool; a fourth valve is provided between the inlet of the first valve and the outlet of the flow meter;

[0011] When the first valve, the suction pump and the second valve are opened, and the third valve and the fourth valve are closed, the first valve, the suction pump, the flow meter and the second valve connect the flat membrane and the water pool to form a membrane flux test path;

[0012] When the third valve, the suction pump and the fourth valve are opened, and the first valve and the second valve are closed, the third valve, the suction pump, the flow meter and the fourth valve are connected to the discharge port and the flat membrane group integrity test passage.

[0013] Optionally, a negative pressure gauge is provided at the inlet of the suction pump.

[0014] Optionally, a positive pressure gauge is provided at the outlet of the flow meter.

[0015] Optionally, the discharge port is further connected to a discharge pipe, and the discharge pipe is connected to a fifth valve.

[0016] Optionally, an overflow port is provided near the top of the test pool, and a drain port is provided near the bottom of the test pool.

[0017] Optionally, the inner wall of the test cell is provided with a plurality of slots, and the slots are detachably provided with spacers, and the spacers are inserted into the slots to fix the flat membrane.

[0018] Optionally, the test pool is assembled from organic glass, and the length, width and height of the interior of the test pool are 520 mm, 22 mm and 1800 mm respectively.

[0019] Optionally, the test pool is arranged in a fixing frame, a fabricated base is arranged at the bottom of the fixing frame, and a pulley is arranged at the bottom of the base.

[0020] Optionally, the fixing frame is assembled from a square tube and a U-shaped tube by assembly bolts.

[0021] Compared with the prior art, the technical solution of the utility model has beneficial effects.

[0022] For example, the rigid flat membrane testing device provided by the utility model, through the reasonable deployment of valves and pipelines, uses the same testing device to realize the membrane flux test and integrity test of the flat membrane. The integrity test can be carried out after the membrane flux test is completed, avoiding the disassembly and installation of the flat membrane, improving the testing efficiency, realizing the reuse of components such as the test pool, suction pump and flow meter, and reducing the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a rigid flat membrane testing device in an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of fixing the test pool in the embodiment of the utility model;

[0025] Figure 3 It is a top schematic diagram of the test pool when it is fixed in the embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Test pool; 11. Overflow port; 12. Drain port; 13. Spacer bar;

[0028] 2. Water pool; 21. Discharge port; 22. Discharge pipe;

[0029] 3. Flat membrane;

[0030] 4. Test passage; 41. First valve; 42. Suction pump; 43. Flow meter; 44. Second valve; 45. Third valve; 46. Fourth valve; 47. Negative pressure gauge; 48. Positive pressure gauge;

[0031] 5. Fifth valve;

[0032] 6. Fixed frame; 61. Base; 62. Pulley. DETAILED DESCRIPTION

[0033] In the prior art, the existing membrane flux test and integrity test are performed on different test devices. After the membrane flux test is completed, the flat membrane needs to be disassembled and then installed on the integrity test device, which results in low test efficiency and high test cost.

[0034] In order to solve the above technical problems, the utility model provides a testing device for checking rigid flat membranes. The experimental device realizes the membrane flux test and integrity test of the flat membrane through the same testing device, thereby improving the test efficiency.

[0035] In order to make the purpose, features and beneficial effects of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0036] Figure 1 It is a schematic diagram of a rigid flat membrane testing device in an embodiment of the utility model; Figure 2 This is a schematic diagram of fixing the test pool in the embodiment of the utility model; Figure 3 It is a top schematic diagram of the test pool when it is fixed in the embodiment of the utility model.

[0037] Reference Figure 1-Figure 3 , an embodiment of the utility model provides a rigid flat membrane testing device.

[0038] Specifically, the experimental device includes:

[0039] The test tank 1 is used to accommodate the flat membrane 3 and allow the flow of test sewage to perform membrane flux testing;

[0040] A water tank 2, used to contain the produced water of the flat membrane 3 or the test water;

[0041] The test passage 4 includes a first valve 41, a suction pump 42, a flow meter 43 and a second valve 44 which are sequentially connected through pipelines, the inlet of the first valve 41 is connected to the flat membrane 3, and the outlet of the second valve 44 is connected to the pool 2; the outlet of the first valve 41 is connected to a third valve 45, and the third valve 45 is connected to the discharge port 21 of the pool 2, and a fourth valve 46 is provided between the inlet of the first valve 41 and the outlet of the flow meter 43;

[0042] When the first valve 41, the suction pump 42 and the second valve 44 are opened, and the third valve 45 and the fourth valve 46 are closed, the first valve 41, the suction pump 42, the flow meter 43 and the second valve 44 connect the flat membrane 3 and the water pool 2 to form a membrane flux test path;

[0043] When the third valve 45, the suction pump 42 and the fourth valve 46 are opened and the first valve 41 and the second valve 44 are closed, the third valve 45, the suction pump 42, the flow meter 43 and the fourth valve 46 connect the discharge port 21 and the three groups of integrity test passages of the flat membrane.

[0044] In some embodiments, a negative pressure gauge 47 is provided at the inlet of the suction pump 42 .

[0045] In some embodiments, a positive pressure gauge 48 is provided at the outlet of the flow meter 43 .

[0046] In the specific implementation, during the membrane flux test, the test sewage is introduced into the test pool 1 to immerse the flat membrane 3, the third valve 45 and the fourth valve 46 are closed, the first valve 41, the suction pump 42 and the second valve 44 are opened, and the suction pump 42 generates negative pressure to force the flat membrane 3 to produce water. The water produced by the flat membrane 3 enters the water pool 2 through the membrane flux test passage. The opening of the suction pump 42 is adjusted so that the pressure value of the negative pressure gauge 47 is -10kp. At this pressure, the flow value and time of the flow meter 43 are recorded, and the average flow rate per minute is calculated to determine whether the design requirements are met; assuming that the membrane flux is required to reach 120L / (m 2 ·h)-180L / (m 2 h), the flat membrane area of ​​150 model is 1.5m 2 According to Q=J*A, the flow rate per minute is required to reach 3L / min-4.5L / min.

[0047] In a specific implementation, during the integrity test, the test sewage in the test pool 1 is discharged, the first valve 41 and the second valve 44 are closed, and the third valve 45, the suction pump 42 and the fourth valve 46 are opened. The suction pump 42 draws the test water in the pool 2 through the drain port and passes it into the flat membrane 3 to simulate the process of passing the reagent to clean the flat membrane. Assuming that the maximum pressure that the flat membrane 3 can withstand is 40kp, the test water is continuously passed into the flat membrane 3 until the positive pressure gauge 48 shows that the pressure value reaches above 40kp, it is considered that the requirement is met. If the pressure value displayed on the positive pressure gauge 48 decreases before the pressure value reaches 40kp, it means that the flat membrane 3 is damaged before the pressure reaches 40kp, and it is considered that the requirement is not met.

[0048] In some embodiments, the discharge port 21 is further connected to a discharge pipe 22, and the discharge pipe 22 is connected to a fifth valve 5; after the test is completed, the fifth valve 5 is opened to discharge the test water.

[0049] In some embodiments, an overflow port 11 is provided near the top of the test pool 1, and a vent port 12 is provided near the bottom of the test pool 1; excess test wastewater can be discharged through a pipeline connected to the overflow port 11, and after the membrane flux test is completed, the test wastewater in the test pool 1 can be discharged through a pipeline connected to the vent port 12.

[0050] In some embodiments, the inner wall of the test pool 1 is provided with a plurality of card strip openings, and a spacer bar 13 is detachably provided in the card strip opening. The spacer bar 13 is inserted into the card strip opening to fix the flat membrane 3. When the flat membrane 3 of different widths is processed, the spacer bars 13 of different sizes can be replaced to adapt to the change in the width of the flat membrane 3.

[0051] In some embodiments, the test pool 1 is assembled from organic glass, and the length, width and height of the interior of the test pool 1 are 520 mm, 22 mm and 1800 mm respectively.

[0052] In some embodiments, the test pool 1 is disposed in a fixing frame 6, and the fixing frame 6 is used to fix the test pool 1 to ensure the stability of the structure of the test pool 1. An assembled base 61 is disposed at the bottom of the fixing frame 6, and a pulley 62 is disposed at the bottom of the base 61 to facilitate the movement of the test device.

[0053] In some embodiments, the fixing frame 6 is assembled from a square tube and a U-shaped tube by assembly bolts.

[0054] In summary, the rigid flat membrane testing device provided by the utility model realizes the membrane flux test and integrity test of the flat membrane 3 by the same testing device through the reasonable deployment of valves and pipelines. The integrity test can be carried out after the membrane flux test is completed, avoiding the disassembly and installation of the flat membrane 3, improving the testing efficiency, realizing the reuse of components such as the test pool 1, the suction pump 42 and the flow meter 43, and reducing the equipment cost.

[0055] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than simply through the specific combination listed in the claims.

[0056] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A rigid flat membrane testing device, characterized in that: include: A test tank, used to accommodate the flat membrane and allow the flow of test sewage for membrane flux testing; A water tank, used to hold the produced water of the flat membrane or the test water; A test passage, comprising a first valve, a suction pump, a flow meter and a second valve connected in sequence through a pipeline, wherein an inlet of the first valve is connected to the flat membrane, and an outlet of the second valve is connected to the water pool; a third valve is connected to the outlet of the first valve, and the third valve is connected to the discharge port of the water pool; a fourth valve is provided between the inlet of the first valve and the outlet of the flow meter; When the first valve, the suction pump and the second valve are opened, and the third valve and the fourth valve are closed, the first valve, the suction pump, the flow meter and the second valve connect the flat membrane and the water pool to form a membrane flux test path; When the third valve, the suction pump and the fourth valve are opened, and the first valve and the second valve are closed, the third valve, the suction pump, the flow meter and the fourth valve are connected to the discharge port and the flat membrane group integrity test passage.

2. The rigid flat membrane testing device according to claim 1, characterized in that: The inlet of the suction pump is provided with a negative pressure gauge.

3. The rigid flat membrane testing device according to claim 1, characterized in that: The outlet of the flow meter is provided with a positive pressure gauge.

4. The rigid flat membrane testing device according to claim 1, characterized in that: The discharge port is also connected to a discharge pipe, and the discharge pipe is connected to a fifth valve.

5. The rigid flat membrane testing device according to claim 1, characterized in that: An overflow port is arranged near the top of the test pool, and a drain port is arranged near the bottom of the test pool.

6. The rigid flat membrane testing device according to claim 1, characterized in that: The inner wall of the test pool is provided with a plurality of clamping strip openings, in which the clamping strip openings are detachably provided with spacer strips, and the spacer strips are inserted into the clamping strip openings to fix the flat membrane.

7. The rigid flat membrane testing device according to claim 1, characterized in that: The test pool is assembled from organic glass, and the length, width and height of the interior of the test pool are 520 mm, 22 mm and 1800 mm respectively.

8. The rigid flat membrane testing device according to claim 1, characterized in that: The test pool is arranged in a fixing frame, an assembled base is arranged at the bottom of the fixing frame, and a pulley is arranged at the bottom of the base.

9. The rigid flat membrane testing device according to claim 8, characterized in that: The fixing frame is assembled from a square tube and a U-shaped tube by assembly bolts.

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