A filter system for waterworks simulation test

Abstract

The utility model discloses a filter system for water supply plant simulation test, it includes water inlet device, backwash device and filter column, and water inlet device is equipped with water inlet tank, water inlet pump, water inlet main pipe, water inlet pump outlet pipe and overflow main pipe, and every filter column is connected with water inlet branch pipe and overflow branch pipe, and multiple overflow branch pipes are backflowed to water inlet tank through overflow main pipe, and the junction of every water inlet branch pipe and water inlet pump outlet pipe is provided with a water inlet flowmeter and a water inlet quantity regulating valve, the filter column still is connected with a filter column outlet pipe and a filter column emptying pipe, and the filter column outlet pipe is equipped with valve and outlet flowmeter in proper order, and the filter column emptying pipe is equipped with valve, and the filter column is equipped with a plurality of water outlet faucet. The utility model can accurately control and measure the water inlet flow and outlet flow of every filter column, realizes filter column constant water level and constant speed filter speed, can carry out multiple filter material test simultaneously, can accurately sample along the filter column, improves simulation test efficiency and effect, and brings the convenience for model test.

Description

Technical Field

[0001] This utility model relates to the field of filter bed water treatment technology, and in particular to a filter bed system for simulation tests in water supply plants. Background Technology

[0002] Filter beds are crucial structural units in water treatment processes. Water treatment plants need to conduct experiments to optimize process parameters or modify filter beds based on production conditions; these experiments involve simulating filter bed filtration. Filter bed simulations typically utilize filter columns for pilot-scale testing, where model filter columns are fabricated according to experimental requirements. Currently, filter column devices used in drinking water simulation tests at water supply plants are generally simple in structure, have limited functionality, are inconvenient to use, and struggle to achieve constant water level and constant filtration rates, resulting in unsatisfactory simulation test results. Therefore, improvements are necessary. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a filter system for water supply plant simulation tests.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a filter system for a water supply plant simulation test, comprising an inlet device, a backwashing device, and multiple filter columns. Each filter column is connected to the inlet device and the backwashing device. The inlet device is equipped with an inlet tank, an inlet pump, an inlet main pipe, an inlet pump outlet pipe, and an overflow main pipe. Each filter column is connected to an inlet branch pipe and an overflow branch pipe. The inlet tank is connected to the inlet pump through the inlet main pipe. The inlet pump outlet pipe is connected to the outlet end of the inlet pump. The inlet pump outlet pipe supplies water to each filter column through multiple inlet branch pipes. Multiple overflow branch pipes return water to the inlet tank through the overflow main pipe. Each inlet branch pipe is equipped with an inlet flow meter and an inlet flow regulating valve at the connection point with the inlet pump outlet pipe. Each filter column is also connected to a filter column outlet pipe and a filter column drain pipe. The filter column outlet pipe is equipped with a valve and an outlet flow meter in sequence. The filter column drain pipe is equipped with a valve. Each filter column has multiple outlet taps distributed longitudinally.

[0005] In a further technical solution, the backwashing device consists of a water flushing device and an air flushing device.

[0006] In a further technical solution, the water inlet tank is equipped with a water inlet tank cover, the main water inlet pipe is connected to a water tank drain pipe, the overflow main pipe is equipped with an overflow drain pipe, the water inlet pump outlet pipe is equipped with a water inlet return pipe, and each of the main water inlet pipe, water tank drain pipe, water inlet pump outlet pipe, water inlet return pipe, overflow main pipe and overflow drain pipe is equipped with a valve. The water inlet pump outlet pipe is connected to the water inlet branch pipe through the valve, the water inlet return pipe is connected to the top of the water inlet tank, and the overflow main pipe is connected to the top of the water inlet tank through the valve.

[0007] In a further technical solution, the filter column includes a hollow cylinder, a base located at the lower part of the hollow cylinder, and a filter plate located on the base. Multiple water outlets are longitudinally distributed at different heights on the hollow cylinder. The top of the hollow cylinder is open, the lower part of the hollow cylinder is provided with a filter media discharge pipe, and the bottom of the base is provided with a vent pipe.

[0008] In a further technical solution, the outer wall of each filter column is wrapped with a removable light-shielding sleeve, which is located above the height of the filter layer required for the simulation test from the bottom of the hollow cylinder.

[0009] In a further technical solution, the light-shielding sleeve is provided with Velcro, and the light-shielding sleeve is formed with clearance cuts at the positions of the water faucet and the filter media drain pipe for the water faucet and the filter media drain pipe to pass through.

[0010] In a further technical solution, the end of the filter media discharge pipe is provided with a rotatable threaded cap, and the end of the vent pipe is provided with a rotatable threaded plug.

[0011] In a further technical solution, the filter system is also equipped with a control cabinet and an operating frame. Each filter column is assembled side by side on the operating frame, and the control cabinet is used to control the water inlet device and the backwashing device.

[0012] In a further technical solution, the filter column also includes a fixing ring, which is fitted over the hollow cylinder. The hollow cylinder is assembled to the operating frame via the fixing ring, and a rubber sealing ring is provided between the fixing ring and the hollow cylinder.

[0013] In a further technical solution, the water flushing device includes a backflushing water tank, a water flushing pump, a water flushing main pipe, a water flushing pump outlet pipe, a water flushing return pipe, multiple backflushing drain pipes, and multiple water flushing branch pipes. The bottom of the backflushing water tank is connected to the water flushing main pipe, and the backflushing water tank is equipped with a backflushing water tank cover. A water flushing drain pipe is provided on the water flushing main pipe. The water flushing main pipe is connected to the water flushing pump inlet, and the water flushing pump outlet pipe is connected to the water flushing pump outlet. Valves are provided on the water flushing main pipe, the water flushing drain pipe, the water flushing pump outlet pipe, the backflushing drain pipe, and the water flushing return pipe. The water flushing pump outlet pipe is connected to the water flushing branch pipes after passing through the valves, and the water flushing return pipes are connected to the backflushing water tank after passing through the valves. Each filter column is connected to the corresponding water flushing branch pipe and the backflushing drain pipe. A water flushing flow meter and a valve are provided at the connection between each water flushing branch pipe and the water flushing pump outlet pipe.

[0014] The air-flushing device includes an air compressor, an air-flushing main pipe, a gas check valve, a gas flow meter, and multiple air-flushing branch pipes. Each air-flushing branch pipe is connected to the air compressor through the air-flushing main pipe. The connection section between each air-flushing branch pipe and the air-flushing main pipe is equipped with the gas flow meter and the gas check valve. Each air-flushing branch pipe is connected to a corresponding filter column.

[0015] The advantages of this invention compared to the prior art after adopting the above structure are:

[0016] This invention can accurately control and measure the inlet and outlet flow rates of each filter column, achieving a constant water level and constant filtration rate. It also returns overflowing water from the filter column to the water tank to avoid waste, and can evenly distribute water and air. By setting multiple filter columns, it can conduct multiple filter media tests simultaneously. By setting multiple longitudinally distributed water outlets, it facilitates precise sampling along the filter column, improving the efficiency and effectiveness of simulation tests and bringing convenience to model tests. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this operating frame;

[0020] Figure 3 This is a structural diagram of the water inlet device, backwashing device, and filter column;

[0021] Figure 4 This is a schematic diagram of the filter column structure;

[0022] Figure 5 This is a flat lay image of the blackout cover. Detailed Implementation

[0023] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0024] like Figures 1 to 5 As shown, this utility model provides a filter system for a water supply plant simulation test, which includes an inlet device, a backwashing device, and multiple filter columns. Each filter column is connected to the inlet device and the backwashing device. The inlet device is equipped with an inlet tank 1, an inlet pump 2, an inlet main pipe 3, an inlet pump outlet pipe 4, and an overflow main pipe 6. Each filter column is connected to an inlet branch pipe 5 and an overflow branch pipe 7. The inlet tank 1 is connected to the inlet pump 2 through the inlet main pipe 3, and the inlet pump outlet pipe 4 is connected to the outlet end of the inlet pump 2. Water pipe 4 supplies water to each filter column through multiple inlet branch pipes 5. Multiple overflow branch pipes 7 return to the inlet tank 1 through the overflow main pipe 6. Each inlet branch pipe 5 is equipped with an inlet flow meter 9 and an inlet flow regulating valve 19 at the connection between it and the outlet pipe 4 of the inlet pump. The filter column is also connected to a filter column outlet pipe 38 and a filter column drain pipe 39. The filter column outlet pipe 38 is equipped with a valve and an outlet flow meter 41 in sequence. The filter column drain pipe 39 is equipped with a valve. Each filter column has multiple water taps 49 distributed longitudinally.

[0025] In order to better illustrate the working principle of the present invention, the valve of the filter column outlet pipe 38 will be marked as valve 40 and the valve corresponding to the filter column drain pipe 39 will be marked as valve 42.

[0026] In practical use, filter media is poured into the filter column to the required height for the test. Test water is added to the inlet tank 1, and the inlet pump 2 is started. The inlet flow regulating valve 19 corresponding to the filter column used in the test is adjusted according to the required inlet water volume until the reading of the inlet flow meter 9 of the filter column reaches the test requirements. After the water level of the filter column reaches the required liquid level for the test, the valve 40 is opened and the opening degree is adjusted until the reading of the outlet flow meter 41 reaches the test requirements. Filtered water is taken from the end of the outlet pipe 38 of the filter column, and different water samples are taken from the outlet faucet 49 according to the test requirements.

[0027] Among them, the overflow branch pipe 7 and the overflow main pipe 6 are used to control the liquid level of the filter column to be constant and not overflow during filtration, and to return to the water inlet tank 1 to avoid water waste. The water inlet flow meter 9 is used to observe and assist in controlling the water inlet flow. The water inlet regulating valve 19 is used to control the amount of water inlet. Multiple longitudinally distributed water outlets 49 are used to take water samples at different filter layer depths to facilitate monitoring the water quality changes along the filter layer at different depths.

[0028] This invention can accurately control and measure the inlet and outlet flow rates of each filter column, achieving a constant water level and constant filtration speed. It also returns overflowing water from the filter column to the water tank to avoid waste, and can evenly distribute water and air. By setting multiple filter columns, it can conduct multiple filter media tests simultaneously. By setting multiple longitudinally distributed water faucets 49, it is convenient to accurately sample along the filter column, improving the efficiency and effect of simulation tests and bringing convenience to model tests.

[0029] More specifically, the water inlet tank 1 is a PE plastic bucket with a diameter of 1050mm and a height of 1080mm.

[0030] In this embodiment, the backwashing device consists of a water flushing device and an air flushing device.

[0031] In this embodiment, the water inlet tank 1 is provided with a water inlet tank cover 10, the water inlet main pipe 3 is connected to a water tank drain pipe 11, the overflow main pipe 6 is provided with an overflow drain pipe 17, the water inlet pump outlet pipe 4 is provided with a water inlet return pipe 8, and the water inlet main pipe 3, the water tank drain pipe 11, the water inlet pump outlet pipe 4, the water inlet return pipe 8, the overflow main pipe 6 and the overflow drain pipe 17 are all provided with a valve. The water inlet pump outlet pipe 4 is connected to the water inlet branch pipe 5 through the valve, the water inlet return pipe 8 is connected to the top of the water inlet tank 1, and the overflow main pipe 6 is connected to the top of the water inlet tank 1 through the valve.

[0032] In order to better explain the working principle of the present invention, the following text will explain...

[0033] The valve corresponding to the main water inlet pipe 3 is marked as valve 12;

[0034] The valve corresponding to the water inlet pump outlet pipe 4 is marked as valve 14;

[0035] The valve corresponding to the inlet return pipe 8 is marked as valve 15;

[0036] The valve corresponding to the water tank drain pipe 11 is marked as valve 13;

[0037] The valve corresponding to overflow manifold 6 is marked as valve 16;

[0038] The valve corresponding to the overflow drain pipe 17 is marked as valve 18.

[0039] In this embodiment, the filter column includes a hollow cylinder 48, a base 47 located at the lower part of the hollow cylinder 48, and a filter plate 51 located at the base 47. Multiple water outlets 49 are longitudinally distributed at different heights on the hollow cylinder 48. The top of the hollow cylinder 48 is open, and a filter media discharge pipe 50 is provided at the lower part of the hollow cylinder 48. A vent pipe 52 is provided at the bottom of the base.

[0040] The top of the hollow cylinder 48 is open to facilitate the filling of filter media, water intake, and cleaning of the hollow cylinder. More specifically, there are 5 filter columns. Setting up 5 filter columns allows for simultaneous testing of multiple filter media, and each filter column can be filled with different filter media.

[0041] The filter plate 51 has several circular through holes of the same size, with a hole diameter of 3mm, which facilitates the even distribution of water and air and prevents the filter material from entering the base 47.

[0042] More specifically, the filter plate 51 is connected to the hollow cylinder 48 and the base 47 with rubber sealing rings.

[0043] In a further technical solution, the outer wall of each filter column is wrapped with a removable light-shielding sleeve 53, which is located above the height of the filter layer required for the simulation test from the bottom of the hollow cylinder 48.

[0044] The light-shielding sleeve 53 is provided with Velcro 54 at both ends and at the top and bottom of each water tap 49, and the light-shielding sleeve 53 is formed with a clearance cut 55 at the position of the water tap 49 for the water tap 49 to pass through.

[0045] More specifically, the light-blocking cover 53 is made of light-blocking fabric to achieve the effect of blocking light, thereby preventing algae growth. In addition, the light-blocking cover 53 is also provided with mounting holes 56 for easy installation.

[0046] Among them, the Velcro 54 can be opened and closed at any time, which is convenient for blocking light and observing the condition of the filter column.

[0047] Similarly, the light-shielding sleeve 53 also has an avoidance cut 55 formed at the position of the filter media discharge pipe 50 to facilitate the filling of the support layer and the discharge of the filter media.

[0048] In a further technical solution, the end of the filter media drain pipe 50 is provided with a rotatable threaded cap 60, which is used to fill the support layer and drain the filter media. The end of the drain pipe 52 is provided with a rotatable threaded plug 61, which is used to drain the water below the base 47.

[0049] More specifically, the hollow cylinder 48, filter media drain pipe 50, filter plate 51, threaded cap 60, and base 47 are all made of colorless organic transparent glass, which facilitates observation of the device's operation and filter media changes, and also facilitates observation and control of the filter media filling height.

[0050] In a further technical solution, the filter system is also equipped with a control cabinet 66 and an operating frame. Each filter column is assembled side by side on the operating frame. The control cabinet 66 is used to control the water inlet device and the backwashing device.

[0051] In a further technical solution, the filter column also includes a fixing ring 57, which is sleeved on the outside of the hollow cylinder 48. The hollow cylinder 48 is assembled to the operating frame through the fixing ring 57, and a rubber sealing ring is provided between the fixing ring 57 and the hollow cylinder 48.

[0052] The operating frame includes a staircase 62, a railing 63, a load-bearing frame 64, and an operating platform 65. The filter column is connected to the operating frame through a fixing ring 57, which makes it easy for the operator to walk onto the operating platform 65 to fill the filter material.

[0053] The fixing ring 57 is a stainless steel ring.

[0054] In a further technical solution, the water flushing device includes a backwash water tank 20, a water flushing pump 21, a water flushing main pipe 22, a water flushing pump outlet pipe 23, a water flushing return pipe 26, multiple backwashing drain pipes 25, and multiple water flushing branch pipes 24. The bottom of the backwash water tank 20 is connected to the water flushing main pipe 22, and the backwash water tank 20 is equipped with a backwash water tank cover 28. A water flushing drain pipe 29 is provided on the water flushing main pipe 22, which is connected to the water inlet of the water flushing pump 21. The water flushing pump outlet pipe 23 is connected to the water outlet of the water flushing pump 21. The water supply connection includes valves on the main water flush pipe 22, the water flush drain pipe 29, the water flush pump outlet pipe 23, the backwash drain pipe 25, and the water flush return pipe 26. The water flush pump outlet pipe 23 is connected to the water flush branch pipe 24 after passing through the valve, and the water flush return pipe 26 is connected to the top of the backwash water tank 20 after passing through the valve. Each filter column is connected to the corresponding water flush branch pipe 24 and backwash drain pipe 25. A water flush flow meter 27 and a valve are installed at the connection between each water flush branch pipe 24 and the water flush pump outlet pipe 23.

[0055] In order to better explain the working principle of the present invention, the following text will explain...

[0056] The valve corresponding to the main water flush pipe 22 is marked as valve 30;

[0057] The valve corresponding to the water flush drain pipe 29 is marked as valve 31;

[0058] The valve corresponding to the water outlet pipe 23 of the water flushing pump is marked as valve 33;

[0059] The valve corresponding to the backwash drain pipe 25 is marked as valve 37;

[0060] The valve corresponding to the water flush return pipe 26 is marked as valve 34;

[0061] The valve corresponding to water flushing branch pipe 24 is marked as valve 36;

[0062] The air-flushing device includes an air compressor 43, an air-flushing main pipe 44, a gas check valve 45, a gas flow meter 46, and multiple air-flushing branch pipes 35. Each air-flushing branch pipe 35 is connected to the air compressor 43 through the air-flushing main pipe 44. The connection section between each air-flushing branch pipe 35 and the air-flushing main pipe 44 is equipped with the gas flow meter 46 and the gas check valve 45. Each air-flushing branch pipe 35 is connected to a corresponding filter column.

[0063] To better illustrate the working principle of this invention, the specific experimental procedure is provided as follows:

[0064] (1) Unscrew the threaded cap 60, add the support material with a spoon, and tighten the threaded cap 60 after filling; walk onto the operating platform 65 and pour the filter material into the top opening of the filter column to the required height for the test.

[0065] (2) Open the inlet tank cover 10 of the inlet tank 1 and add test water. Open valves 12, 14, 15 and 16 and start the inlet pump 2. Adjust the opening of the inlet flow regulating valve 15 until the water pressure in the outlet pipe 4 of the inlet pump is appropriate to avoid excessive water pressure. Adjust the inlet flow regulating valve 19 corresponding to the filter column used in the test until the reading of the inlet flow meter 9 of the filter column reaches the test requirements. After the water level of the filter column reaches the required liquid level for the test, open valve 40 and adjust the opening until the reading of the outlet flow meter 41 reaches the test requirements. Take the filtered water from the end of the outlet pipe 38 of the filter column and open the outlet tap 49 to take different water samples along the way according to the test requirements.

[0066] (3) After the test, shut off the inlet pump 2, close the outlet tap 49, valve 40, and inlet valve 19; open valve 13 to drain the water in the main inlet pipe 3 and the inlet tank 1; open valve 18 to drain the water in the overflow branch pipe 7 and the overflow main pipe 6; open valve 42 and unscrew the threaded plug 61 to drain the water in the filter column; after the water in the main inlet pipe 3, the inlet tank 1, the overflow branch pipe 7, the overflow main pipe 6, and the filter column has been drained, close all valves and tighten the threaded plug 61.

[0067] (4) When backwashing is required, first ensure that all valves, pumps and air compressors of the device are closed, open the backwash water tank cover 28 of the backwash water tank 20 to add backwash water, open valves 30, 33, 34 and 37, start the water flushing pump 21, adjust the opening of valve 34 according to the water flushing volume until the water pressure in the water flushing pump outlet pipe 23 of the water flushing pump 21 is appropriate, and avoid excessive water pressure; adjust the opening of valve 36 corresponding to the filter column used in the test according to the required water flushing volume until the reading of the water flushing flow meter 27 of the filter column meets the test requirements.

[0068] (5) After the water flushing is finished, turn off the water flushing pump 21, close valve 36, open valve 31, and drain the water from the main water flushing pipe 22 and the backwash water tank 20; open valve 42 and unscrew the threaded plug 61 to drain the water from the filter column; after the water from the main water flushing pipe 22, the backwash water tank 20 and the filter column has been drained, close all valves and tighten the threaded plug 61.

[0069] (6) When backwashing is required, water can be introduced into the filter column through the inlet pump 2 or the water flushing pump 21. After the backwashing water in the filter column submerges the filter media layer, close the pump and all valves, open valve 37, start the air compressor 43, and rotate the knob of the gas flow meter 46 according to the required air flushing intensity until its reading meets the test requirements.

[0070] (7) After the air flushing is completed, shut down the air compressor 43, tighten the knob of the gas flow meter 46 to make its reading 0; open the valve 42 and unscrew the threaded plug 61 to drain the water from the filter column. After the water in the filter column is drained, close all valves and tighten the threaded plug 61.

[0071] (8) When backwashing and mixing are required, first start the test operation process step (6), and then start the test operation process step (4).

[0072] (9) After the mixed flushing is completed, first turn off the air compressor 43, tighten the knob of the gas flow meter 46 to make its reading 0, continue the water flushing, and when the water flushing is completed, start the test operation process step (5).

[0073] (10) When it is necessary to replace the support material or filter material, unscrew the threaded cap 60 and use a spoon to scoop out the filter material or support material. To accelerate the downward movement of the filter material, water can be added from the top opening of the filter column or the water pump 2 can be started to add water. After the filter material or support material is scooped out, repeat the test operation process step (1).

[0074] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A filter system for simulation testing in a water supply plant, characterized in that: It includes an inlet device, a backwashing device, and multiple filter columns. Each filter column is connected to the inlet device and the backwashing device. The inlet device is equipped with an inlet tank (1), an inlet pump (2), an inlet main pipe (3), an inlet pump outlet pipe (4), and an overflow main pipe (6). Each filter column is connected to an inlet branch pipe (5) and an overflow branch pipe (7). The inlet tank (1) is connected to the inlet pump (2) through the inlet main pipe (3). The inlet pump outlet pipe (4) is connected to the outlet end of the inlet pump (2). The inlet pump outlet pipe (4) is distributed through multiple inlet branch pipes (5). Water is not supplied to each filter column. Multiple overflow branch pipes (7) return to the water inlet tank (1) through the overflow main pipe (6). Each water inlet branch pipe (5) is equipped with a water inlet flow meter (9) and a water inlet flow regulating valve (19) at the connection between it and the water inlet pump outlet pipe (4). The filter column is also connected to a filter column outlet pipe (38) and a filter column drain pipe (39). The filter column outlet pipe (38) is equipped with a valve and an outlet flow meter (41) in sequence. The filter column drain pipe (39) is equipped with a valve. Each filter column has multiple water outlets (49) distributed longitudinally.

2. The filter system for water supply plant simulation testing according to claim 1, characterized in that: The backwashing device consists of a water flushing device and an air flushing device.

3. The filter system for water supply plant simulation testing according to claim 1, characterized in that: The water inlet tank (1) is provided with a water inlet tank cover (10), the water inlet main pipe (3) is connected to the water tank drain pipe (11), the overflow main pipe (6) is provided with an overflow drain pipe (17), the water inlet pump outlet pipe (4) is provided with an inlet return pipe (8), the water inlet main pipe (3), the water tank drain pipe (11), the water inlet pump outlet pipe (4), the inlet return pipe (8), the overflow main pipe (6) and the overflow drain pipe (17) are all provided with a valve, the water inlet pump outlet pipe (4) is connected to the water inlet branch pipe (5) through the valve, the inlet return pipe (8) is connected to the top of the water inlet tank (1), and the overflow main pipe (6) is connected to the top of the water inlet tank (1) through the valve.

4. A filter system for water supply plant simulation testing according to claim 1, characterized in that: The filter column includes a hollow cylinder (48), a base (47) located at the bottom of the hollow cylinder (48), and a filter plate (51) located on the base (47). Multiple water outlets (49) are longitudinally distributed at different heights on the hollow cylinder (48). The top of the hollow cylinder (48) is open. The bottom of the hollow cylinder (48) is provided with a filter media discharge pipe (50), and the bottom of the base (47) is provided with a vent pipe (52).

5. A filter system for water supply plant simulation testing according to claim 4, characterized in that: Each of the filter columns is covered with a removable light-shielding sleeve (53) on its outer wall, which is located from the bottom of the hollow cylinder (48) to above the required filter layer height for the simulation test.

6. A filter system for water supply plant simulation testing according to claim 5, characterized in that: The light-shielding sleeve (53) is provided with Velcro (54), and the light-shielding sleeve (53) is formed with clearance cuts (55) at the positions of the water faucet (49) and the filter media drain pipe (50) for the water faucet (49) and the filter media drain pipe (50) to pass through.

7. A filter system for water supply plant simulation testing according to claim 4, characterized in that: The end of the filter media discharge pipe (50) is provided with a rotatable threaded cap (60), and the end of the vent pipe (52) is provided with a rotatable threaded plug (61).

8. A filter system for water supply plant simulation testing according to claim 1, characterized in that: The filter system is also equipped with a control cabinet (66) and an operating frame. Each filter column is assembled side by side on the operating frame. The control cabinet (66) is used to control the water inlet device and the backwashing device.

9. A filter system for water supply plant simulation testing according to claim 8, characterized in that: The filter column also includes a fixing ring (57), which is fitted around the hollow cylinder (48). The hollow cylinder (48) is assembled to the operating frame through the fixing ring (57), and a rubber sealing ring is provided between the fixing ring (57) and the hollow cylinder (48).

10. A filter system for water supply plant simulation testing according to claim 2, characterized in that: The water flushing device includes a backwash water tank (20), a water flushing pump (21), a water flushing main pipe (22), a water flushing pump outlet pipe (23), a water flushing return pipe (26), multiple backwashing drain pipes (25), and multiple water flushing branch pipes (24). The bottom of the backwash water tank (20) is connected to the water flushing main pipe (22), and the backwash water tank (20) is equipped with a backwash water tank cover (28). A water flushing drain pipe (29) is provided on the water flushing main pipe (22). The water flushing main pipe (22) is connected to the water inlet of the water flushing pump (21), and the water flushing pump outlet pipe (23) is connected to the water outlet of the water flushing pump (21). The water flushing main pipe (22), the water flushing drain pipe (29), the water flushing pump outlet pipe (23), and the backwashing drain pipe are connected to the water inlet of the water flushing pump (21). Valves are provided on both the pipe (25) and the water flush return pipe (26). The water flush pump outlet pipe (23) is connected to the water flush branch pipe (24) after passing through the valve. The water flush return pipe (26) is connected to the backwash water tank (20) after passing through the valve. Each filter column is connected to the corresponding water flush branch pipe (24) and backwash drain pipe (25). A water flush flow meter (27) and a valve are provided at the connection between each water flush branch pipe (24) and the water flush pump outlet pipe (23). A filter column outlet pipe (38) and a filter column drain pipe (39) are provided at the connection between the water flush flow meter (27) and the filter column. A valve and an outlet flow meter (41) are provided in sequence at the filter column outlet pipe (38). A valve is provided at the filter column drain pipe (39). The air-punching device includes an air compressor (43), an air-punching main pipe (44), a gas check valve (45), a gas flow meter (46), and multiple air-punching branch pipes (35). Each air-punching branch pipe (35) is connected to the air compressor (43) through the air-punching main pipe (44). The connection section between each air-punching branch pipe (35) and the air-punching main pipe (44) is equipped with the gas flow meter (46) and the gas check valve (45). Each air-punching branch pipe (35) is connected to the corresponding filter column.

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