Multi-item filter test platform and test method thereof

Abstract

The invention discloses a multi-item filter test platform and a test method thereof. The multi-item filter test platform comprises a workbench, a TOC tester, a particle counter, a fiber detection filter, a conductivity flow cell, a pH flow cell, an electromagnetic directional valve III and a main liquid inlet pump, a TOC tester, a conductivity flow cell and a pH flow cell are arranged on the inner bottom surface of the workbench, a fiber detection filter is arranged in the workbench, and a particle counter is arranged on the upper surface of the workbench; the fiber detection filter is communicated with the conductivity flow cell, and the conductivity flow cell is respectively communicated with the TOC tester and the pH flow cell; the electromagnetic directional valve III is a two-position three-way electromagnetic directional valve, the main liquid inlet pump is communicated with an inlet R of the electromagnetic directional valve III through a pipeline via the filter to be tested, a working port A of the electromagnetic directional valve III is respectively communicated with the particle counter and the fiber detection filter, and water filtered by the filter to be tested is tested. According to the invention, multiple independent tests can be conveniently carried out on the to-be-tested filter, the test stability is ensured, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of filter testing, and in particular to a multi-project filter testing platform and a testing method thereof. Background Art

[0002] Filter testing is a key step in ensuring that filtration equipment can effectively remove impurities from liquids or gases. It is essential to ensure product quality, maintain safe operation of equipment, and meet specific industry standards. Filter testing projects are numerous and complex, so improving test efficiency is a common pursuit of laboratory workers. However, laboratory test equipment is currently scattered and needs to be rebuilt for each test, resulting in insufficient test stability and low test efficiency. Therefore, the above problems need to be solved urgently. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a multi-project filter testing platform and a testing method thereof, in which a TOC tester, a particle counter, a fiber detection filter, a conductivity flow cell and a pH flow cell are integrated on a workbench, and through the switching coordination of electromagnetic reversing valve I, electromagnetic reversing valve II, electromagnetic reversing valve III, electromagnetic reversing valve IV, electromagnetic reversing valve V, electromagnetic reversing valve VI and electromagnetic reversing valve VII, and through a special pipeline design, it is convenient to perform multiple independent tests on the filter to be tested, which not only does not require repeated reconstruction, thereby ensuring the stability of the test, but also saves time and effort, saves the use of test samples, and improves the test efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical scheme: a multi-item filter testing platform of the present invention, its innovation point is: it includes a workbench, a TOC tester, a particle counter, a fiber detection filter, a conductivity flow cell, a pH flow cell, an electromagnetic reversing valve III and a main liquid inlet pump; the workbench is a hollow rectangular parallelepiped frame structure arranged horizontally, and the TOC tester, the conductivity flow cell and the pH flow cell are arranged in sequence from left to right on its inner bottom surface, a fiber detection filter is arranged inside it directly above the conductivity flow cell, and a particle counter is arranged on the upper surface of the fiber detection filter on the right side; the outlet of the fiber detection filter is connected to the outlet of the conductivity flow cell through a pipeline The inlet is connected, and the outlet of the conductivity circulation cell is connected with the inlet of the TOC tester and the inlet of the pH circulation cell through pipelines; the electromagnetic reversing valve III is a two-position three-way electromagnetic reversing valve, and the main liquid inlet pump is connected with the inlet R of the electromagnetic reversing valve III through the filter to be tested through a pipeline, the exhaust port P of the electromagnetic reversing valve III is connected with the outside, and its working port A is connected with the inlet of the particle counter and the inlet of the fiber detection filter through the electromagnetic reversing valve Ⅶ, respectively, and then the test water is pumped to flush the filter to be tested through the main liquid inlet pump, and the flushed filtrate is sent to the particle counter, fiber detection filter, conductivity circulation cell, TOC tester and pH circulation cell for testing.

[0005] Preferably, it also includes an electromagnetic reversing valve I; an electromagnetic reversing valve I is also connected to the side of the main liquid inlet pump away from the filter to be tested, and the electromagnetic reversing valve I is connected to the main liquid inlet pump and the water source through pipelines respectively. The electromagnetic reversing valve I is a two-position two-way electromagnetic reversing valve, and the on-off of the water source entering the main liquid inlet pump is controlled by switching the electromagnetic reversing valve I.

[0006] Preferably, it also includes a buffer tank; a buffer tank is also connected to the pipeline between the electromagnetic reversing valve I and the main liquid inlet pump, and the buffer tank is arranged on the upper surface of the workbench relative to the left side of the particle counter; a piston assembly is also provided in the buffer tank, and the flow rate of water in the corresponding pipeline is balanced by adjusting the piston assembly, thereby reducing the impact interference of the external water pressure on the main liquid inlet pump.

[0007] Preferably, it also includes a flowmeter I; a flowmeter I is also connected to the pipeline located on the side of the main liquid inlet pump close to the filter to be tested, the flowmeter I is electrically connected to the main liquid inlet pump, and the main liquid inlet pump is equipped with a pump speed regulator, and then the flow rate of water entering the filter to be tested is controlled by the cooperation of the main liquid inlet pump and the flowmeter I.

[0008] Preferably, it also includes an electromagnetic reversing valve II and an electromagnetic reversing valve IV; the electromagnetic reversing valve VII is a two-position two-way electromagnetic reversing valve, and an electromagnetic reversing valve II is also connected to the pipeline located between the flow meter I and the filter to be tested, the electromagnetic reversing valve II is a two-position two-way electromagnetic reversing valve, and the electromagnetic reversing valve II is used to control the on-off of water entering the filter to be tested; the electromagnetic reversing valve IV is a two-position two-way electromagnetic reversing valve, and is installed on the workbench; one end of the electromagnetic reversing valve IV is connected to the pipeline located between the flow meter I and the electromagnetic reversing valve II through a pipeline, and the other end is connected to the pipeline located between the particle counter and the electromagnetic reversing valve VII through a pipeline, and then when the electromagnetic reversing valve II and the electromagnetic reversing valve VII are closed, water is pumped into the electromagnetic reversing valve IV through the main liquid inlet pump, and the particle counter, fiber detection filter, conductivity flow cell, TOC tester and pH flow cell are cleaned respectively.

[0009] Preferably, it also includes an electromagnetic reversing valve V, a shunt pump I and a flowmeter II; the electromagnetic reversing valve V, the shunt pump I and the flowmeter II are also sequentially arranged on the pipeline between the TOC tester and the conductivity flow cell, the electromagnetic reversing valve V is a two-position two-way electromagnetic reversing valve, and it is arranged on the side of the conductivity flow cell, and then the electromagnetic reversing valve V is used to control the on-off of the filtrate entering the TOC tester; the flowmeter II is electrically connected to the shunt pump I, and the shunt pump I is equipped with a pump speed regulator, and then the flow rate of the filtrate entering the TOC tester is controlled by the cooperation of the shunt pump I and the flowmeter II.

[0010] Preferably, it also includes an electromagnetic reversing valve VI, a shunt pump II and a flowmeter III; the electromagnetic reversing valve VI, the shunt pump II and the flowmeter III are also sequentially arranged on the pipeline between the pH circulation pool and the conductivity circulation pool, the electromagnetic reversing valve VI is a two-position two-way electromagnetic reversing valve, and it is arranged on the side of the conductivity circulation pool, and then the electromagnetic reversing valve VI is used to control the on-off of the filtrate entering the pH circulation pool; the flowmeter III is electrically connected to the shunt pump II, and the shunt pump II is equipped with a pump speed regulator, and then the flow rate of the filtrate entering the pH circulation pool is controlled by the cooperation of the shunt pump II and the flowmeter III.

[0011] Preferably, it also includes a drain pipe I, a drain pipe II, a drain pipe III and a drain trough; a drain trough is horizontally inclined along the length direction of the front surface of the workbench near its bottom end, the drain trough is in the form of low front and high back, and its upper end extends to the interior of the workbench, and is respectively arranged without interfering with the TOC tester, the conductivity circulation cell and the pH circulation cell; the outlet of the particle counter is connected to the drain trough through the drain pipe I, and the outlet of the TOC tester is connected to the drain trough through the drain pipe II, and the outlet of the pH circulation cell is connected to the drain trough through the drain pipe III, so that the tested filtrate is collected in the drain trough for centralized discharge.

[0012] The invention discloses a method for testing a multi-item filter testing platform, which is innovative in that it comprises the following steps: Step 1: First, the electromagnetic reversing valve I, the electromagnetic reversing valve II and the electromagnetic reversing valve VII are closed, and the electromagnetic reversing valve IV, the electromagnetic reversing valve V and the electromagnetic reversing valve VI are opened; Step 2: Then the electromagnetic reversing valve I is opened, and the water pumped in by the main liquid inlet pump flows to the particle counter, the fiber detection filter, the conductivity flow cell, the TOC tester and the pH flow cell through the electromagnetic reversing valve IV, and the particle counter, the fiber detection filter, the conductivity flow cell, the TOC tester and the pH flow cell are cleaned respectively, and the cleaned water is discharged centrally through the drainage trough; Step 3: When TOC is less than 100ppb, the number of particles with a diameter greater than 10um is less than 20, and the number of particles with a diameter greater than 25um is less than 5, it means that the cleaning is completed; then the electromagnetic reversing valve IV is closed, the electromagnetic reversing valve II and the electromagnetic reversing valve VII are opened, and at the same time, the valve core of the electromagnetic reversing valve III is moved to the right, so that the working port A of the electromagnetic reversing valve III is connected with its exhaust port P; at this time, the gas in the pipelines connected between the particle counter, the fiber detection filter, the conductivity flow cell, the TOC tester and the pH flow cell is discharged to the outside through the exhaust port P of the electromagnetic reversing valve III; Step 4: Then move the valve core of the electromagnetic reversing valve III to the left, so that the inlet R of the electromagnetic reversing valve III is connected with its working port A. At this time, the test water passes through the buffer tank and is pumped by the main liquid inlet pump to flush the filter to be tested. The filtrate after flushing is diverted to the particle counter, and the particle counter is used to detect and analyze the degree of solid particle contamination in the filtrate; most of the filtrate after flushing flows through the fiber detection filter, and the fiber detection filter is used to detect the degree of microfiber release in the filtrate; Step 5: After the test is completed, the filtrate in the particle counter is collected into the drain tank through the drain pipe Ⅰ, and the filtrate in the fiber detection filter flows into the conductivity flow cell, and the conductivity flow cell is used to detect the current conducting capacity of the filtrate; Step 6: After the test, the filtrate in the conductivity flow cell flows to the TOC tester and the pH flow cell respectively. The total amount of organic carbon in the filtrate is detected by the TOC tester, and the acidity and alkalinity of the filtrate is detected by the pH flow cell. Step 7: After the test is completed, the filtrate in the TOC tester is collected to the drain tank through the drain pipe II, and the filtrate in the pH flow cell is collected to the drain tank through the drain pipe III; then the electromagnetic reversing valve II and the electromagnetic reversing valve VII are closed, the electromagnetic reversing valve IV is opened, and the valve core of the electromagnetic reversing valve III is moved to the right at the same time, so that the working port A of the electromagnetic reversing valve III is connected with its exhaust port P; at this time, the water pumped in by the main liquid inlet pump flows to the particle counter, fiber detection filter, conductivity flow cell, TOC tester and pH flow cell respectively through the electromagnetic reversing valve IV, and the particle counter, fiber detection filter, conductivity flow cell, TOC tester and pH flow cell are cleaned respectively, and the cleaned water is discharged centrally through the drain tank; Step 8: After cleaning, repeat steps 3 to 7 to test the next filter.

[0013] Beneficial effects of the present invention: (1) The present invention integrates a TOC tester, a particle counter, a fiber detection filter, a conductivity flow cell and a pH flow cell on a workbench, and through the switching and coordination of electromagnetic reversing valves I, II, III, IV, V, VI and VII, and through a special pipeline design, it is convenient to perform multiple independent tests on the filter to be tested, which not only does not require repeated reconstruction, ensuring the stability of the test, but also saves time and labor, saves the use of test samples, and improves the test efficiency; (2) The present invention can perform one-stop cleaning of TOC testers, particle counters, fiber detection filters, conductivity flow cells, and pH flow cells, which is convenient and quick; (3) The present invention provides an electromagnetic reversing valve III to discharge the gas in the pipeline before testing, thereby preventing the TOC tester, particle counter, fiber detection filter, conductivity flow cell and pH flow cell from being affected by the gas entering the TOC tester, particle counter, fiber detection filter, conductivity flow cell and pH flow cell, thereby improving the test accuracy; (4) The present invention first detects the release status of particles and fibers, thereby avoiding the influence of TOC, conductivity and pH tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The figure is a schematic diagram of a multi-item filter testing method of the present invention.

[0016] Among them, 1- pipeline; 2- TOC tester; 3- filter to be tested; 4- electromagnetic reversing valve I; 5- buffer tank; 6- main liquid inlet pump; 7- electromagnetic reversing valve II; 8- electromagnetic reversing valve III; 9- electromagnetic reversing valve IV; 10- particle counter; 11- drain pipe I; 12- drain pipe II; 13- fiber detection filter; 14- conductivity flow cell; 15- flow meter I; 16- pH flow cell; 17- drain pipe III; 18- electromagnetic reversing valve V; 19- branch pump I; 20- electromagnetic reversing valve VI; 21- branch pump II; 22- flow meter II; 23- flow meter III; 24- electromagnetic reversing valve VII. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below through specific implementation methods.

[0018] A multi-item filter test platform of the present invention comprises a workbench, a TOC tester 2, a particle counter 10, a fiber detection filter 13, a conductivity flow cell 14, a pH flow cell 16, an electromagnetic reversing valve III 8 and a main liquid inlet pump 6; the specific structure is as follows Figure 1As shown, the workbench is a hollow rectangular parallelepiped frame structure arranged horizontally, and a TOC tester 2, a conductivity flow cell 14 and a pH flow cell 16 are arranged in sequence from left to right on its inner bottom surface, a fiber detection filter 13 is arranged inside it directly above the conductivity flow cell 14, and a particle counter 10 is arranged on its upper surface on the right side of the fiber detection filter 13; the outlet of the fiber detection filter 13 is connected to the inlet of the conductivity flow cell 14 through a pipeline 1, and the outlet of the conductivity flow cell 14 is connected to the inlet of the TOC tester 2 and the inlet of the pH flow cell 16 through a pipeline 1; the electromagnetic reversing valve III 8 is A two-position three-way electromagnetic reversing valve, and the main liquid inlet pump 6 is connected with the inlet R of the electromagnetic reversing valve III8 through the pipeline 1 via the filter to be tested 3, the exhaust port P of the electromagnetic reversing valve III8 is connected with the outside, and its working port A is connected with the inlet of the particle counter 10 and the inlet of the fiber detection filter 13 through the electromagnetic reversing valve VII, and then the test water is pumped to flush the filter to be tested 3 through the main liquid inlet pump 6, and the flushed filtrate is respectively sent to the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14, the TOC tester 2 and the pH flow cell 16 for testing; wherein, the electromagnetic reversing valve VII24 is a two-position two-way electromagnetic reversing valve.

[0019] like Figure 1 As shown, an electromagnetic reversing valve Ⅰ4 is also connected to the side of the main liquid inlet pump 6 away from the filter 3 to be tested. The electromagnetic reversing valve Ⅰ4 is connected to the main liquid inlet pump 6 and the water source through a pipeline 1. The electromagnetic reversing valve Ⅰ4 is a two-position two-way electromagnetic reversing valve, and the on-off of the water source entering the main liquid inlet pump 6 is controlled by switching the electromagnetic reversing valve Ⅰ4.

[0020] like Figure 1 As shown, a buffer tank 5 is also connected to the pipeline 1 between the electromagnetic reversing valve Ⅰ4 and the main liquid inlet pump 6, and the buffer tank 5 is arranged on the upper surface of the workbench relative to the left side of the particle counter 10; a piston assembly is also provided in the buffer tank 5, and the flow rate of water in the corresponding pipeline 1 is balanced by adjusting the piston assembly, thereby reducing the impact interference of the external water pressure on the main liquid inlet pump 6.

[0021] like Figure 1 As shown, a flow meter Ⅰ15 is also connected to the pipeline 1 located on the side of the main liquid inlet pump 6 close to the filter 3 to be tested. The flow meter Ⅰ15 is electrically connected to the main liquid inlet pump 6, and the main liquid inlet pump 6 is equipped with a pump speed regulator. The flow rate of water entering the filter 3 to be tested is controlled by the cooperation of the main liquid inlet pump 6 and the flow meter Ⅰ15.

[0022] like Figure 1As shown, an electromagnetic reversing valve II7 is also connected to the pipeline 1 located between the flow meter I15 and the filter 3 to be tested. The electromagnetic reversing valve II7 is a two-position two-way electromagnetic reversing valve, and the electromagnetic reversing valve II7 is used to control the on-off of water entering the filter 3 to be tested; the electromagnetic reversing valve IV9 is a two-position two-way electromagnetic reversing valve and is installed on a workbench; one end of the electromagnetic reversing valve IV9 is connected to the pipeline 1 located between the flow meter I15 and the electromagnetic reversing valve II7 through the pipeline 1, and the other end of the electromagnetic reversing valve IV9 is connected to the pipeline 1 located between the particle counter 10 and the electromagnetic reversing valve VII24 through the pipeline 1, and then when the electromagnetic reversing valve II7 and the electromagnetic reversing valve VII24 are closed, water is pumped into the electromagnetic reversing valve IV9 through the main liquid inlet pump 6, and the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14, the TOC tester 2 and the pH flow cell 16 are cleaned respectively.

[0023] like Figure 1 As shown, an electromagnetic reversing valve V18, a shunt pump I19 and a flow meter II22 are sequentially arranged on the pipeline 1 between the TOC tester 2 and the conductivity flow cell 14. The electromagnetic reversing valve V18 is a two-position two-way electromagnetic reversing valve, and is arranged on the side of the conductivity flow cell 14, and the on-off of the filtrate entering the TOC tester 2 is controlled by the electromagnetic reversing valve V18; the flow meter II22 is electrically connected to the shunt pump I19, and the shunt pump I19 is equipped with a pump speed regulator, and the flow rate of the filtrate entering the TOC tester 2 is controlled by the cooperation of the shunt pump I19 and the flow meter II22.

[0024] like Figure 1 As shown, an electromagnetic reversing valve VI20, a shunt pump II21 and a flow meter III23 are sequentially arranged on the pipeline 1 between the pH circulation pool 16 and the conductivity circulation pool 14. The electromagnetic reversing valve VI20 is a two-position two-way electromagnetic reversing valve, and is arranged on the side of the conductivity circulation pool 14, and then the electromagnetic reversing valve VI20 is used to control the on-off of the filtrate entering the pH circulation pool 16; the flow meter III23 is electrically connected to the shunt pump II21, and the shunt pump II21 is equipped with a pump speed regulator, and then the flow rate of the filtrate entering the pH circulation pool 16 is controlled by the cooperation of the shunt pump II21 and the flow meter III23. The present invention controls the inlet flow rate of the pH circulation pool 16 by the shunt pump II21, so that the test is more accurate.

[0025] The flowmeters I, II and III of the present invention can not only measure the real-time flow rate, but also calculate the accumulated flushing volume.

[0026] The present invention provides a drainage groove on the front surface of the workbench near its bottom and along its length direction. Figure 1As shown, the drainage trough is in the form of being low in the front and high in the back, and its upper end extends to the interior of the workbench, and is respectively arranged without interfering with the TOC tester 2, the conductivity circulation pool 14 and the pH circulation pool 16; the outlet of the particle counter 10 is connected to the drainage trough through the drainage pipe Ⅰ11, and the outlet of the TOC tester 2 is connected to the drainage trough through the drainage pipe Ⅱ12, and the outlet of the pH circulation pool 16 is connected to the drainage trough through the drainage pipe Ⅲ17, and then the tested filtrate is collected in the drainage trough for centralized discharge.

[0027] A testing method of a multi-item filter testing platform of the present invention, such as Figure 1 As shown, the following steps are included: Step 1: First, the electromagnetic reversing valve I4, the electromagnetic reversing valve II7 and the electromagnetic reversing valve VII24 are closed, and the electromagnetic reversing valve IV9, the electromagnetic reversing valve V18 and the electromagnetic reversing valve VI20 are opened.

[0028] Step 2: Then the electromagnetic reversing valve I4 is opened, and the water pumped in by the main liquid inlet pump 6 flows to the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14, the TOC tester 2 and the pH flow cell 16 through the electromagnetic reversing valve IV9, and cleans the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14, the TOC tester 2 and the pH flow cell 16 respectively, and the cleaned water is discharged centrally through the drainage trough.

[0029] Step 3: When TOC is less than 100ppb, the number of particles with a diameter greater than 10um is less than 20, and the number of particles with a diameter greater than 25um is less than 5, it means that the cleaning is completed; then the electromagnetic reversing valve IV9 is closed, the electromagnetic reversing valve II7 and the electromagnetic reversing valve VII24 are opened, and at the same time, the valve core of the electromagnetic reversing valve III8 is moved to the right, so that the working port A of the electromagnetic reversing valve III8 is connected with its exhaust port P; at this time, the gas in the pipelines interconnected between the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14, the TOC tester 2 and the pH flow cell 16 is discharged to the outside through the exhaust port P of the electromagnetic reversing valve III8.

[0030] Step 4: Then move the valve core of the electromagnetic reversing valve III8 to the left, so that the inlet R of the electromagnetic reversing valve III8 is connected with its working port A. At this time, the test water passes through the buffer tank 5 and is pumped by the main liquid inlet pump 6 to flush the filter 3 to be tested. The filtrate after flushing is diverted to the particle counter 10, and the particle counter 10 detects and analyzes the degree of solid particle contamination in the filtrate; most of the filtrate after flushing flows through the fiber detection filter 13, and the fiber detection filter 13 is used to detect the degree of microfiber release in the filtrate.

[0031] Step 5: After the test is completed, the filtrate in the particle counter 10 is collected into the drain tank through the drain pipe Ⅰ11, and the filtrate in the fiber detection filter 13 flows into the conductivity flow cell 14, and the conductivity flow cell 14 detects the current conducting capacity of the filtrate.

[0032] Step 6: After the test, the filtrate in the conductivity flow cell 14 flows to the TOC tester 2 and the pH flow cell 16 respectively. The total amount of organic carbon in the filtrate is detected by the TOC tester 2, and the acidity and alkalinity of the filtrate are detected by the pH flow cell 16.

[0033] Step 7: After the test is completed, the filtrate in the TOC tester 2 is collected to the drain trough through the drain pipe II 12, and the filtrate in the pH circulation pool 16 is collected to the drain trough through the drain pipe III 17; then the electromagnetic reversing valve II 7 and the electromagnetic reversing valve VII 24 are closed, the electromagnetic reversing valve IV 9 is opened, and at the same time, the valve core of the electromagnetic reversing valve III 8 moves to the right, so that the working port A of the electromagnetic reversing valve III is connected with its exhaust port P; at this time, the water pumped in by the main liquid inlet pump 6 flows to the particle counter 10, the fiber detection filter 13, the conductivity circulation pool 14, the TOC tester 2 and the pH circulation pool 16 respectively through the electromagnetic reversing valve IV 9, and the particle counter 10, the fiber detection filter 13, the conductivity circulation pool 14, the TOC tester 2 and the pH circulation pool 16 are cleaned respectively, and the cleaned water is discharged centrally through the drain trough.

[0034] Step 8: After cleaning, repeat steps 3 to 7 to test the next filter 3 to be tested.

[0035] Beneficial effects of the present invention: (1) The present invention integrates a TOC tester 2, a particle counter 10, a fiber detection filter 13, a conductivity flow cell 14, and a pH flow cell 16 on a workbench, and through the switching and coordination of the electromagnetic reversing valve I4, the electromagnetic reversing valve II7, the electromagnetic reversing valve III8, the electromagnetic reversing valve IV9, the electromagnetic reversing valve V18, the electromagnetic reversing valve VI20, and the electromagnetic reversing valve VII24, and through a special pipeline design, it is convenient to perform multiple independent tests on the filter 3 to be tested, which not only does not need to be repeatedly rebuilt, ensuring the stability of the test, but also saves time and labor, saves the use of test samples, and improves the test efficiency; (2) The present invention can perform one-stop cleaning of the TOC tester 2, the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14 and the pH flow cell 16, which is convenient and quick; (3) The present invention provides an electromagnetic reversing valve III 8 to discharge the gas in the pipeline 1 before testing, thereby preventing the TOC tester 2, the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14 and the pH flow cell 16 from being affected by the gas entering the TOC tester 2, the particle counter 10, the fiber detection filter 13, the conductivity flow cell 14 and the pH flow cell 16, thereby improving the test accuracy; (4) The present invention first detects the release status of particles and fibers, thereby avoiding the influence of TOC, conductivity and pH tests.

[0036] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. A multi-item filter testing platform, characterized in that: The invention comprises a workbench, a TOC tester, a particle counter, a fiber detection filter, a conductivity flow cell, a pH flow cell, an electromagnetic reversing valve III and a main liquid inlet pump; the workbench is a hollow rectangular parallelepiped frame structure arranged horizontally, and the TOC tester, the conductivity flow cell and the pH flow cell are arranged in sequence from left to right on the inner bottom surface thereof, a fiber detection filter is arranged inside thereof just above the conductivity flow cell, and a particle counter is arranged on the upper surface thereof on the right side of the fiber detection filter; the outlet of the fiber detection filter is connected to the inlet of the conductivity flow cell through a pipeline, and the outlet of the conductivity flow cell is connected to the inlet of the conductivity flow cell through a pipeline respectively. It is connected with the inlet of the TOC tester and the inlet of the pH circulation cell; the electromagnetic reversing valve III is a two-position three-way electromagnetic reversing valve, and the main liquid inlet pump is connected with the inlet R of the electromagnetic reversing valve III through the pipeline via the filter to be tested, the exhaust port P of the electromagnetic reversing valve III is connected with the outside, and its working port A is respectively connected with the inlet of the particle counter and the inlet of the fiber detection filter through the electromagnetic reversing valve Ⅶ, and then the test water is pumped to flush the filter to be tested through the main liquid inlet pump, and the filtrate after flushing is respectively sent to the particle counter, fiber detection filter, conductivity circulation cell, TOC tester and pH circulation cell for testing.

2. A multi-item filter testing platform according to claim 1, characterized in that: It also includes an electromagnetic reversing valve I; an electromagnetic reversing valve I is also connected to the side of the main liquid inlet pump away from the filter to be tested, and the electromagnetic reversing valve I is connected to the main liquid inlet pump and the water source through pipelines respectively. The electromagnetic reversing valve I is a two-position two-way electromagnetic reversing valve, and the on-off of the water source entering the main liquid inlet pump is controlled by switching the electromagnetic reversing valve I.

3. A multi-item filter testing platform according to claim 2, characterized in that: It also includes a buffer tank; a buffer tank is also connected to the pipeline between the electromagnetic reversing valve I and the main liquid inlet pump, and the buffer tank is arranged on the upper surface of the workbench relative to the left side of the particle counter; a piston assembly is also provided in the buffer tank, and the flow rate of water in the corresponding pipeline is balanced by adjusting the piston assembly, thereby reducing the impact interference of the external water pressure on the main liquid inlet pump.

4. A multi-item filter testing platform according to claim 1, characterized in that: It also includes a flowmeter I; a flowmeter I is also connected to the pipeline located on the side of the main liquid inlet pump close to the filter to be tested, the flowmeter I is electrically connected to the main liquid inlet pump, and the main liquid inlet pump is equipped with a pump speed regulator, and then the flow rate of water entering the filter to be tested is controlled by the cooperation of the main liquid inlet pump and the flowmeter I.

5. A multi-item filter testing platform according to claim 4, characterized in that: It also includes an electromagnetic reversing valve II and an electromagnetic reversing valve IV; the electromagnetic reversing valve VII is a two-position two-way electromagnetic reversing valve, and an electromagnetic reversing valve II is also connected on the pipeline between the flow meter I and the filter to be tested, the electromagnetic reversing valve II is a two-position two-way electromagnetic reversing valve, and the electromagnetic reversing valve II is used to control the on-off of water entering the filter to be tested; the electromagnetic reversing valve IV is a two-position two-way electromagnetic reversing valve, and is installed on the workbench; one end of the electromagnetic reversing valve IV is connected to the pipeline between the flow meter I and the electromagnetic reversing valve II through a pipeline, and the other end is connected to the pipeline between the particle counter and the electromagnetic reversing valve VII through a pipeline, and then when the electromagnetic reversing valve II and the electromagnetic reversing valve VII are closed, water is pumped into the electromagnetic reversing valve IV through the main liquid inlet pump, and the particle counter, fiber detection filter, conductivity flow cell, TOC tester and pH flow cell are cleaned respectively.

6. A multi-item filter testing platform according to claim 5, characterized in that: It also includes an electromagnetic reversing valve V, a shunt pump I and a flow meter II; the electromagnetic reversing valve V, the shunt pump I and the flow meter II are sequentially arranged on the pipeline between the TOC tester and the conductivity flow cell, the electromagnetic reversing valve V is a two-position two-way electromagnetic reversing valve, and it is arranged on the side of the conductivity flow cell, and the electromagnetic reversing valve V is used to control the on-off of the filtrate entering the TOC tester; the flow meter II is electrically connected to the shunt pump I, and the shunt pump I is equipped with a pump speed regulator, and the flow rate of the filtrate entering the TOC tester is controlled by the cooperation of the shunt pump I and the flow meter II.

7. A multi-item filter testing platform according to claim 6, characterized in that: It also includes an electromagnetic reversing valve VI, a shunt pump II and a flowmeter III; the electromagnetic reversing valve VI, the shunt pump II and the flowmeter III are sequentially arranged on the pipeline between the pH circulation pool and the conductivity circulation pool, the electromagnetic reversing valve VI is a two-position two-way electromagnetic reversing valve, and it is arranged on the side of the conductivity circulation pool, and the electromagnetic reversing valve VI is used to control the on-off of the filtrate entering the pH circulation pool; the flowmeter III is electrically connected to the shunt pump II, and the shunt pump II is equipped with a pump speed regulator, and the flow rate of the filtrate entering the pH circulation pool is controlled by the cooperation of the shunt pump II and the flowmeter III.

8. A multi-item filter testing platform according to claim 7, characterized in that: It also includes a drain pipe I, a drain pipe II, a drain pipe III and a drain trough; a drain trough is horizontally inclined along the length direction of the front surface of the workbench near its bottom end, the drain trough is low in front and high in the back, and its upper end extends to the interior of the workbench, and is respectively arranged without interfering with the TOC tester, the conductivity circulation cell and the pH circulation cell; the outlet of the particle counter is connected to the drain trough through the drain pipe I, and the outlet of the TOC tester is connected to the drain trough through the drain pipe II, and the outlet of the pH circulation cell is connected to the drain trough through the drain pipe III, so that the tested filtrate is collected in the drain trough for centralized discharge.

9. A method for testing a multi-item filter testing platform according to claim 8, characterized in that The following steps are involved: Step 1: First, the electromagnetic reversing valve I, the electromagnetic reversing valve II and the electromagnetic reversing valve VII are closed, and the electromagnetic reversing valve IV, the electromagnetic reversing valve V and the electromagnetic reversing valve VI are opened; Step 2: Then the electromagnetic reversing valve I is opened, and the water pumped in by the main liquid inlet pump flows to the particle counter, the fiber detection filter, the conductivity flow cell, the TOC tester and the pH flow cell through the electromagnetic reversing valve IV, and the particle counter, the fiber detection filter, the conductivity flow cell, the TOC tester and the pH flow cell are cleaned respectively, and the cleaned water is discharged centrally through the drainage trough; Step 3: When TOC is less than 100ppb, the number of particles with a diameter greater than 10um is less than 20, and the number of particles with a diameter greater than 25um is less than 5, it means that the cleaning is completed; then the electromagnetic reversing valve IV is closed, the electromagnetic reversing valve II and the electromagnetic reversing valve VII are opened, and at the same time, the valve core of the electromagnetic reversing valve III is moved to the right, so that the working port A of the electromagnetic reversing valve III is connected with its exhaust port P; at this time, the gas in the pipelines connected between the particle counter, the fiber detection filter, the conductivity flow cell, the TOC tester and the pH flow cell is discharged to the outside through the exhaust port P of the electromagnetic reversing valve III; Step 4: Then move the valve core of the electromagnetic reversing valve III to the left, so that the inlet R of the electromagnetic reversing valve III is connected with its working port A. At this time, the test water passes through the buffer tank and is pumped by the main liquid inlet pump to flush the filter to be tested. The filtrate after flushing is diverted to the particle counter, and the particle counter is used to detect and analyze the degree of solid particle contamination in the filtrate; most of the filtrate after flushing flows through the fiber detection filter, and the fiber detection filter is used to detect the degree of microfiber release in the filtrate; Step 5: After the test is completed, the filtrate in the particle counter is collected into the drain tank through the drain pipe Ⅰ, and the filtrate in the fiber detection filter flows into the conductivity flow cell, and the conductivity flow cell is used to detect the current conducting capacity of the filtrate; Step 6: After the test, the filtrate in the conductivity flow cell flows to the TOC tester and the pH flow cell respectively. The total amount of organic carbon in the filtrate is detected by the TOC tester, and the acidity and alkalinity of the filtrate is detected by the pH flow cell. Step 7: After the test is completed, the filtrate in the TOC tester is collected to the drain tank through the drain pipe II, and the filtrate in the pH flow cell is collected to the drain tank through the drain pipe III; then the electromagnetic reversing valve II and the electromagnetic reversing valve VII are closed, the electromagnetic reversing valve IV is opened, and the valve core of the electromagnetic reversing valve III is moved to the right at the same time, so that the working port A of the electromagnetic reversing valve III is connected with its exhaust port P; at this time, the water pumped in by the main liquid inlet pump flows to the particle counter, fiber detection filter, conductivity flow cell, TOC tester and pH flow cell respectively through the electromagnetic reversing valve IV, and the particle counter, fiber detection filter, conductivity flow cell, TOC tester and pH flow cell are cleaned respectively, and the cleaned water is discharged centrally through the drain tank; Step 8: After cleaning, repeat steps 3 to 7 to test the next filter.

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