Filtering mechanism for industrial pure water preparation and industrial pure water preparation device

Abstract

The invention discloses a filtering mechanism for industrial pure water preparation and an industrial pure water preparation device, and relates to the technical field of industrial pure water preparation. The filtering mechanism comprises an activated carbon filter, the upper end and the lower end of the activated carbon filter are communicated with a water inlet pipe and a water outlet pipe respectively, and the lower end of the activated carbon filter is further communicated with a drainage pipe; the water inlet pipe, the water outlet pipe and the water drainage pipe are all provided with electromagnetic valves, the lower end of the water drainage pipe fixedly communicates with a U-shaped settling box, and a settling cavity is formed in the U-shaped settling box. The activated carbon flushing device is simple in structure and convenient to use, activated carbon dust can be collected, waste of water resources is avoided, flushing operation is simple, flushed activated carbon can be directly used, use is more convenient, and an improved scheme integrating low improvement cost, convenient operation, good flushing effect and flushing water resource saving is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial pure water preparation, and in particular to a filtering mechanism for industrial pure water preparation and an industrial pure water preparation device. Background Art

[0002] The commonly used industrial pure water adopts the following steps: the raw water is processed in sequence through a quartz sand filter, an activated carbon filter, a precision filter, a reverse osmosis device, a sterilization device, etc. to produce pure water that meets the quality requirements.

[0003] Activated carbon filters are a commonly used water treatment device. As pre-treatment in water desalination systems, they absorb residual chlorine that can't be removed by the previous filtration stage, effectively extending the service life of subsequent equipment, improving effluent quality, and preventing pollution, particularly from free residual chlorine poisoning in subsequent reverse osmosis membranes and ion exchange resins. They also absorb small organic molecules and other pollutants leaking from the previous stage, significantly removing odors, colloids, pigments, and heavy metal ions in water, while also reducing COD. This can further reduce the SDI value of RO influent, ensuring an SDI of less than 5 and a TOC of less than 2.0 ppm.

[0004] It is worth noting that in the early stage of using activated carbon (or in the early stage of operation after replacing activated carbon), a small amount of extremely fine powdered activated carbon may enter the reverse osmosis equipment system with the water flow, causing fouling and clogging of the reverse osmosis membrane flow channel, resulting in increased operating pressure, decreased water production and increased pressure drop of the system, and this destructive effect is difficult to recover with conventional cleaning methods. Therefore, the activated carbon must be rinsed clean and the fine powder must be removed before the filtered water can be sent to the subsequent RO system. However, the activated carbon filter in the existing technology does not have the function of rinsing the activated carbon. The operation of cleaning the activated carbon needs to be carried out externally, but after the external operation, it needs to be dried before it can be easily put into the activated carbon filter for use. The operation of removing the activated carbon powder is relatively inconvenient, so there is a need for a filtration mechanism and an industrial pure water preparation device for industrial pure water preparation. Summary of the Invention

[0005] The purpose of this application is to provide a filtering mechanism and an industrial pure water preparation device for industrial pure water preparation to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present application provides the following technical solutions: a filtration mechanism for industrial pure water preparation and an industrial pure water preparation device, comprising an activated carbon filter, wherein the upper and lower ends of the activated carbon filter are respectively connected to a water inlet pipe and a water outlet pipe, and the lower end of the activated carbon filter is also connected to a drain pipe, and solenoid valves are provided on the water inlet pipe, the water outlet pipe, and the drain pipe;

[0007] The lower end of the drainage pipe is fixedly connected to a U-shaped sedimentation tank, and a sedimentation chamber is formed in the U-shaped sedimentation tank. A backwash pump is installed at the end of the U-shaped sedimentation tank away from the drainage pipe. A suction pipe is fixed and connected to the upper part of the end of the U-shaped sedimentation tank away from the drainage pipe. One end of the suction pipe is connected to the input end of the backwash pump, and the output end of the backwash pump is fixedly connected to the backwash pipe. The other end of the backwash pipe is connected to the upper end of the activated carbon filter.

[0008] Wherein, the lower end of the suction pipe extends to the lower part of the sedimentation chamber.

[0009] As a further supplement to this solution, a vertically arranged baffle is fixed in the sedimentation chamber, and the lower end of the baffle extends downward and has a level lower than the level of the lower end of the suction pipe;

[0010] A filter membrane is clamped on the lower end of the baffle near the suction pipe, and one end of the filter membrane extends to the side wall of the sedimentation chamber. The baffle and the filter membrane accessories isolate the sedimentation chamber into two areas;

[0011] The suction tube is located in the area of ​​the upper end of the filter membrane.

[0012] As a further supplement to this solution, an opening is provided on one side of the U-shaped sedimentation box, and a material removal door is closed in the opening. An opening for installing a filter membrane is provided on the other side of the U-shaped sedimentation box, and an arc-shaped wall panel adapted to the side wall of the U-shaped sedimentation box is closed at the opening. The inner wall of the arc-shaped wall panel is fixed to one end of the filter membrane, and a seal is formed when the arc-shaped wall panel closes the opening.

[0013] As a further supplement to this solution, a water distribution tray is fixed inside the activated carbon filter. The water distribution tray is located at the upper part of the activated carbon filter. The water distribution tray is connected to the water inlet pipe. A plurality of evenly distributed water outlet holes are opened at the lower end of the water distribution tray.

[0014] The upper end of the backwash pipe passes through the activated carbon filter and is connected to the water distribution pan.

[0015] As a further supplement to this solution, a supporting filter plate is fixed in the activated carbon filter, the supporting filter plate is located in the lower part of the activated carbon filter, the top of the supporting filter plate is filled with activated carbon particles, and the upper and lower ends of the activated carbon particles are filled with filter pads.

[0016] As a further supplement to this solution, a filling pipe and a discharge pipe are also fixed on one side of the activated carbon filter. Both the filling pipe and the discharge pipe are connected to the activated carbon filter. The filling pipe is located below the water distribution tray and above the activated carbon filter. The lower end of the filling pipe is above the activated carbon particles. The discharge pipe is located above the support filter plate and below the activated carbon filter. The upper end of the discharge pipe is located above the filter pad below.

[0017] The filling pipe and the discharge pipe are also provided with electromagnetic valves.

[0018] As a further improvement of the present application, two baffles are provided, and the two baffles are respectively fixed to the inner top wall and the bottom wall of the sedimentation chamber, and there is a gap between the other ends of the two baffles and the inner wall of the sedimentation chamber;

[0019] Among them, an extended baffle is formed on the upper end of the lower baffle, and the extended baffle extends horizontally.

[0020] As a further supplement to this solution, a carbon block is fixed on the top wall of the precipitation chamber on the side of the baffle away from the suction pipe. The carbon block is a conical block with a larger diameter at the upper end and a smaller diameter at the lower end.

[0021] The surface of the carbon block is fixed with densely distributed villi.

[0022] As a further supplement to this solution, a number of guide plates distributed vertically are fixed to the inner wall of the communication port between the U-shaped sedimentation box and the drainage pipe. The adjacent guide plates are symmetrically arranged, and the tail ends of the two guide plates of the bell overlap in the vertical direction.

[0023] An impeller is installed above the uppermost guide plate, one side of the impeller is located below the connecting port between the U-shaped sedimentation box and the drain pipe, and the impeller is rotatably connected to the inner wall of the U-shaped sedimentation box.

[0024] An industrial pure water preparation device includes the above-mentioned filtering mechanism for industrial pure water preparation, including a quartz sand filter, an activated carbon filter, a precision filter, a reverse osmosis device and a sterilization device, wherein the quartz sand filter, the activated carbon filter, the precision filter, the reverse osmosis device and the sterilization device are connected in sequence through pipelines, the input end of the quartz sand filter is connected to raw water, and the output end of the sterilization device outputs industrial pure water.

[0025] In summary, the technical effects and advantages of the present invention are as follows:

[0026] 1. In the present invention, by setting up the U-shaped sedimentation tank, after filling new activated carbon, the user only needs to close the solenoid valve on the water outlet pipe and open the solenoid valves on the water inlet pipe and the drain pipe at the same time, so that the preliminarily treated water enters the activated carbon filter from the water inlet pipe and flushes the activated carbon, so that the activated carbon dust enters the U-shaped sedimentation tank with the water flow and is precipitated in the U-shaped sedimentation tank. Since the activated carbon dust exists in the U-shaped sedimentation tank at the same time, the water in the U-shaped sedimentation tank is the secondary treated water after being adsorbed by the activated carbon and the activated carbon dust. The user can use the backwash pump and the suction pipe to suck the secondary treated water in the U-shaped sedimentation tank for the next new activated carbon flushing operation, thereby realizing the reuse of water resources.

[0027] After improving the existing activated carbon filter, the activated carbon filter can be used to flush the activated carbon, remove the activated carbon dust, and collect the activated carbon dust without wasting water resources. The flushing operation is simple, and the activated carbon after flushing can be used directly, which is more convenient to use, forming an improvement plan that integrates low improvement cost, easy operation, good flushing effect, and saving flushing water resources.

[0028] 2. In the present invention, by setting the baffle and the filter membrane, the activated carbon dust entering the sedimentation chamber can be blocked, so that the activated carbon dust is settled to the bottom of the sedimentation chamber faster. At the same time, when the water flow is drawn out by the suction pipe, the activated carbon dust can be prevented from entering the suction pipe with the water flow, causing the backflow of the activated carbon dust. At the same time, it can also avoid causing a greater workload to the backwash pump or causing damage to the backwash pump, thereby ensuring the feasibility of reusing the water resources in the U-shaped sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 Schematic diagram of the three-dimensional structure of the filtration mechanism for industrial pure water preparation in Example 1;

[0031] Figure 2 Schematic diagram of the cross-sectional structure of the activated carbon filter and the U-shaped sedimentation box in Example 1;

[0032] Figure 3 This is a schematic structural diagram of the U-shaped sedimentation box in Example 1;

[0033] Figure 4 This is a schematic cross-sectional view of the U-shaped sedimentation box in Example 1;

[0034] Figure 5 Schematic diagram of the structure of the industrial pure water preparation device in Example 1;

[0035] Figure 6 This is a schematic diagram of the cross-sectional structure of the U-shaped sedimentation box in Example 2.

[0036] In the figure: 1. Quartz sand filter; 2. Activated carbon filter; 21. Water inlet pipe; 22. Water outlet pipe; 23. Filling pipe; 24. Discharge pipe; 25. Drain pipe; 26. Water distribution tray; 27. Filter pad; 28. Activated carbon granules; 29. ​​Support filter plate; 3. Precision filter; 4. Reverse osmosis device; 5. Sterilization device; 6. U-shaped sedimentation box; 61. Sedimentation chamber; 62. Material taking door; 63. Curved wall panel; 64. Filter membrane; 65. Baffle; 651. Extended baffle; 66. Carbon block; 661. Fluff; 67. Guide plate; 68. Impeller; 7. Backflush pump; 8. Suction pipe; 9. Backflush pipe. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1

[0039] refer to Figure 1-2 The filtration mechanism for preparing industrial pure water shown in the figure includes an activated carbon filter 2. The upper and lower ends of the activated carbon filter 2 are respectively connected to an inlet pipe 21 and an outlet pipe 22. The lower end of the activated carbon filter 2 is also connected to a drain pipe 25. Solenoid valves are provided on the inlet pipe 21, the outlet pipe 22 and the drain pipe 25.

[0040] The lower end of the drain pipe 25 is fixedly connected to a U-shaped sedimentation tank 6, and a sedimentation chamber 61 is formed in the U-shaped sedimentation tank 6. A backwash pump 7 is installed at the end of the U-shaped sedimentation tank 6 away from the drain pipe 25. A suction pipe 8 is fixedly connected to the upper part of the end of the U-shaped sedimentation tank 6 away from the drain pipe 25. One end of the suction pipe 8 is connected to the input end of the backwash pump 7, and the output end of the backwash pump 7 is fixedly connected to the backwash pipe 9. The other end of the backwash pipe 9 is connected to the upper end of the activated carbon filter 2.

[0041] The lower end of the suction pipe 8 extends to the lower part of the sedimentation chamber 61 .

[0042] Based on the above structure, when in use, if new activated carbon is filled (or replaced), the user needs to close the solenoid valve on the water outlet pipe 22 and open the solenoid valves on the water inlet pipe 21 and the drain pipe 25 at the same time, so that the preliminarily treated water enters the activated carbon filter 2 from the water inlet pipe 21 and flushes the activated carbon, so that the activated carbon dust enters the U-shaped sedimentation tank 6 with the water flow and is precipitated in the U-shaped sedimentation tank 6. Since there is activated carbon dust in the U-shaped sedimentation tank 6 at the same time, the water in the U-shaped sedimentation tank 6 is secondary treated water that has been adsorbed by the activated carbon and the activated carbon dust. The user can use the backwash pump 7 and the suction pipe 8 to suck the secondary treated water in the U-shaped sedimentation tank 6 for the next new activated carbon flushing operation, thereby realizing the reuse of water resources.

[0043] After the existing activated carbon filter 2 is improved, the activated carbon filter 2 can perform activated carbon flushing, remove activated carbon dust, and collect activated carbon dust without wasting water resources. The flushing operation is simple, and the activated carbon after flushing can be used directly, which is more convenient to use, forming an improvement plan that integrates low improvement cost, easy operation, good flushing effect, and saving flushing water resources.

[0044] Further, such as Figure 3-Figure 4 As shown, a vertically arranged baffle 65 is fixed in the sedimentation chamber 61, and the lower end of the baffle 65 extends downward and has a level lower than the level of the lower end of the suction pipe 8;

[0045] The baffle 65 is clamped with a filter membrane 64 at the lower end of the side close to the suction pipe 8. One end of the filter membrane 64 extends to the side wall of the sedimentation chamber 61. The baffle 65 and the filter membrane 64 isolate the sedimentation chamber 61 into two areas.

[0046] The suction tube 8 is located in the area of ​​the upper end of the filter membrane 64 .

[0047] By setting the baffle 65 and the filter membrane 64, the activated carbon dust entering the sedimentation chamber 61 can be blocked, so that the activated carbon dust can be settled to the bottom of the sedimentation chamber 61 more quickly. At the same time, when the water flow is drawn out by the suction pipe 8, the activated carbon dust can be prevented from entering the suction pipe 8 with the water flow, causing the backflow of the activated carbon dust. At the same time, it can also avoid causing a greater workload to the backwash pump 7 or causing damage to the backwash pump 7, thereby ensuring the feasibility of reusing the water resources in the U-shaped sedimentation tank 6.

[0048] Furthermore, Figure 3As shown, an opening is provided on one side of the U-shaped sedimentation box 6, and a material taking door 62 is closed in the opening. An opening for installing a filter membrane 64 is provided on the other side of the U-shaped sedimentation box 6, and an arc-shaped wall panel 63 adapted to the side wall of the U-shaped sedimentation box 6 is closed at the opening. The inner wall of the arc-shaped wall panel 63 is fixed to one end of the filter membrane 64, and the arc-shaped wall panel 63 forms a seal when the opening is closed.

[0049] By setting the material taking door 62, after a period of use, the staff can open the material taking door 62 to take out the accumulated activated carbon dust, so as to facilitate the cleaning of the activated carbon dust and the secondary utilization of the activated carbon dust; in addition, the staff can also remove the filter membrane 64 by pulling out the curved wall panel 63, and can replace the filter membrane 64 to ensure the effectiveness of the filter membrane 64 in blocking the activated carbon dust.

[0050] It should be noted that the replacement cycle of the activated carbon in the activated carbon filter 2 is generally 2-3 months. Therefore, the activated carbon dust in the U-shaped sedimentation box 6 can be completely settled. When the activated carbon is replaced next time, the activated carbon dust that can be brought by the suction pipe 8 when absorbing water is limited. Therefore, the filter membrane 64 intercepts less activated carbon dust each time and can be used for a long time.

[0051] Further, such as Figure 2 As shown, a water distribution tray 26 is fixed in the activated carbon filter 2. The water distribution tray 26 is located in the upper part of the activated carbon filter 2. The water distribution tray 26 is connected to the water inlet pipe 21. A plurality of evenly distributed water outlet holes are opened at the lower end of the water distribution tray 26.

[0052] The upper end of the backwash pipe 9 passes through the activated carbon filter 2 and is connected to the water distribution tray 26, so that the backflow water drawn out from the U-shaped sedimentation tank 6 can enter the water distribution tray 26, thereby evenly flushing the (replaced) activated carbon.

[0053] Furthermore, Figure 2 As shown, a support filter plate 29 is fixed in the activated carbon filter 2, and the support filter plate 29 is located in the lower part of the activated carbon filter 2. Activated carbon particles 28 are filled above the support filter plate 29, and filter pads 27 are filled at both the upper and lower ends of the activated carbon particles 28. The filter pads 27 are made of sponge particles or quartz sand materials commonly used in the prior art, and are mainly used to intercept large particles of organic matter, thereby achieving a good filtering effect.

[0054] A filling pipe 23 and a discharge pipe 24 are also fixed to one side of the activated carbon filter 2. Both the filling pipe 23 and the discharge pipe 24 are connected to the activated carbon filter 2. The filling pipe 23 is located below the water distribution tray 26 and above the activated carbon filter 2. The lower end of the filling pipe 23 is located above the activated carbon particles 28. The discharge pipe 24 is located above the support filter plate 29 and below the activated carbon filter 2. The upper end of the discharge pipe 24 is located above the filter pad 27 below.

[0055] The filling pipe 23 and the discharge pipe 24 are also provided with electromagnetic valves.

[0056] The staff can fill the filter pad layer 27 and activated carbon particles 28 into the activated carbon filter 2 through the filling tube 23, and discharge the filter pad layer 27 and activated carbon particles 28 through the discharge pipe 24, thereby replacing the activated carbon particles 28. The operation is convenient. Replacing the activated carbon (i.e., activated carbon particles 28) is a routine operation for staff in this field in the prior art, and the specific steps will not be repeated here.

[0057] like Figure 5 As shown, an industrial pure water preparation device includes the above-mentioned filtering mechanism for industrial pure water preparation, and also includes a quartz sand filter 1, an activated carbon filter 2, a precision filter 3, a reverse osmosis device 4 and a sterilization device 5, wherein the quartz sand filter 1, the activated carbon filter 2, the precision filter 3, the reverse osmosis device 4 and the sterilization device 5 are connected in sequence through pipes, the input end of the quartz sand filter 1 is connected to the raw water, and the output end of the sterilization device 5 outputs industrial pure water. The required industrial pure water can be produced through the treatment of the quartz sand filter 1, the activated carbon filter 2, the precision filter 3, the reverse osmosis device 4 and the sterilization device 5.

[0058] Example 2

[0059] refer to Figure 6 The filtration mechanism for preparing industrial pure water shown in the figure has two baffles 65 , which are respectively fixed to the inner top wall and the bottom wall of the sedimentation chamber 61 , and a gap is formed between the other ends of the two baffles 65 and the inner wall of the sedimentation chamber 61 ;

[0060] An extended blocking piece 651 is formed on the upper end of the lower blocking plate 65 , and the extended blocking piece 651 extends horizontally.

[0061] By setting up the two baffles 65, the activated carbon powder entering the sedimentation chamber 61 can be intercepted more effectively, thereby reducing the amount of activated carbon powder entering under the filter membrane 64, thereby reducing the workload of the filter membrane 64, allowing the filter membrane 64 to be used for a longer time and reducing maintenance costs.

[0062] Further, such as Figure 6 As shown, a carbon block 66 is fixed to the top wall of the precipitation chamber 61 on the side of the baffle 65 away from the suction pipe 8. The carbon block 66 is a conical block with a larger diameter at the upper end and a smaller diameter at the lower end.

[0063] Densely distributed hairs 661 are fixed on the surface of the carbonized block 66 .

[0064] The provision of the carbon block 66 is helpful in intercepting the activated carbon powder floating with the water flow and allowing the activated carbon powder to be adsorbed on the villi 661, further reducing the probability of the activated carbon powder entering under the filter membrane 64, and enabling the activated carbon powder to settle faster, resulting in better use effect.

[0065] Furthermore, Figure 1 As shown, a plurality of guide plates 67 are fixed to the inner side wall of the communication port between the U-shaped sedimentation box 6 and the drain pipe 25. The adjacent guide plates 67 are symmetrically arranged, and the tail ends of the two guide plates 67 overlap in the vertical direction.

[0066] An impeller 68 is installed above the uppermost guide plate 67 , one side of the impeller 68 is located below the communication port between the U-shaped sedimentation box 6 and the drain pipe 25 , and the impeller 68 is rotatably connected to the inner wall of the U-shaped sedimentation box 6 .

[0067] Through the arrangement of the guide plate 67 and the impeller 68, when the water flow carrying the activated carbon enters the U-shaped sedimentation box 6, it first impacts the impeller 68 to make the impeller 68 rotate. When the impeller 68 rotates, it can consume the power of the water flow, thereby slowing down the falling water flow, and when the impeller 68 itself rotates, it can reduce the impact force of the water flow on the impeller 68, so that the service life of the impeller 68 is longer. After being slowed down, the water flow falls onto the guide plate 67 and forms a Z-shaped flow in the U-shaped sedimentation box 6 along multiple guide plates 67, thereby further consuming the kinetic energy of the water flow, which can make the water flow entering the U-shaped sedimentation box 6 calm down faster, thereby avoiding the turbulent water flow that makes it difficult for the activated carbon particles to settle. Faster sedimentation allows the water in the U-shaped sedimentation box 6 to be used for backflow flushing operations more quickly. Therefore, the staff can use the water after rapid sedimentation for secondary or multiple backflow flushing, further saving water resources.

[0068] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A filtering mechanism for preparing industrial pure water, comprising an activated carbon filter (2), wherein the upper and lower ends of the activated carbon filter (2) are respectively connected to a water inlet pipe (21) and a water outlet pipe (22), wherein: The lower end of the activated carbon filter (2) is also connected to a drain pipe (25), and solenoid valves are provided on the water inlet pipe (21), the water outlet pipe (22) and the drain pipe (25); The lower end of the drainage pipe (25) is fixedly connected to a U-shaped sedimentation box (6), a sedimentation chamber (61) is formed in the U-shaped sedimentation box (6), a backwash pump (7) is installed at one end of the U-shaped sedimentation box (6) away from the drainage pipe (25), a suction pipe (8) is fixedly connected to the upper part of one end of the U-shaped sedimentation box (6) away from the drainage pipe (25), one end of the suction pipe (8) is connected to the input end of the backwash pump (7), the output end of the backwash pump (7) is fixedly connected to the backwash pipe (9), and the other end of the backwash pipe (9) is connected to the upper end of the activated carbon filter (2); Wherein, the lower end of the suction pipe (8) extends to the lower part of the sedimentation chamber (61).

2. A filtering mechanism for preparing industrial pure water according to claim 1, characterized in that: A vertically arranged baffle plate (65) is fixed in the sedimentation chamber (61), and the lower end of the baffle plate (65) extends downward and has a level lower than the level of the lower end of the suction pipe (8); A filter membrane (64) is clamped on the lower end of one side of the baffle (65) close to the suction pipe (8), one end of the filter membrane (64) extends to the side wall of the sedimentation chamber (61), and the baffle (65) and the filter membrane (64) accessories isolate the sedimentation chamber (61) into two areas; The suction pipe (8) is located in the area of ​​the upper end of the filter membrane (64).

3. A filtering mechanism for preparing industrial pure water according to claim 2, characterized in that: The U-shaped sedimentation box (6) has an opening on one side, and a material taking door (62) is closed in the opening. The U-shaped sedimentation box (6) has an opening for installing a filter membrane (64) on the other side, and an arc-shaped wall panel (63) adapted to the side wall of the U-shaped sedimentation box (6) is closed at the opening. The inner side wall of the arc-shaped wall panel (63) is fixed to one end of the filter membrane (64), and the arc-shaped wall panel (63) forms a seal when the opening is closed.

4. The filtering mechanism for preparing industrial pure water according to claim 1, characterized in that: A water distribution tray (26) is fixed inside the activated carbon filter (2), the water distribution tray (26) is located in the upper part of the activated carbon filter (2), the water distribution tray (26) is connected to the water inlet pipe (21), and a plurality of evenly distributed water outlet holes are opened at the lower end of the water distribution tray (26); The upper end of the backwash pipe (9) passes through the activated carbon filter (2) and is connected to the water distribution tray (26).

5. A filtering mechanism for preparing industrial pure water according to claim 4, characterized in that: A support filter plate (29) is fixed inside the activated carbon filter (2), the support filter plate (29) is located at the lower part of the activated carbon filter (2), activated carbon particles (28) are filled above the support filter plate (29), and filter pad layers (27) are filled at both the upper and lower ends of the activated carbon particles (28).

6. A filtering mechanism for preparing industrial pure water according to claim 5, characterized in that: A stuffing tube (23) and a discharge tube (24) are also fixed on one side of the activated carbon filter (2); the stuffing tube (23) and the discharge tube (24) are both in communication with the activated carbon filter (2); the stuffing tube (23) is located below the water distribution tray (26) and above the activated carbon filter (2); the lower end of the stuffing tube (23) is located above the activated carbon particles (28); the discharge tube (24) is located above the supporting filter plate (29) and below the activated carbon filter (2); the upper end of the discharge tube (24) is located above the filter pad layer (27) below; Wherein, the filling pipe (23) and the discharge pipe (24) are also provided with electromagnetic valves.

7. The filtering mechanism for preparing industrial pure water according to claim 3, characterized in that: Two baffles (65) are provided, and the two baffles (65) are respectively fixed to the inner top wall of the sedimentation chamber (61) and the bottom wall of the sedimentation chamber (61), and there is a gap between the other ends of the two baffles (65) and the inner wall of the sedimentation chamber (61); An extended baffle (651) is formed at the upper end of the baffle plate (65) below, and the extended baffle (651) extends horizontally.

8. A filtering mechanism for preparing industrial pure water according to claim 7, characterized in that: A carbon block (66) is fixed to the top wall of the precipitation chamber (61) on the side of the baffle (65) away from the suction pipe (8), and the carbon block (66) is a conical block with a larger diameter at the upper end and a smaller diameter at the lower end; Densely distributed villi (661) are fixed on the surface of the carbon block (66).

9. A filtering mechanism for preparing industrial pure water according to claim 8, characterized in that: A plurality of guide plates (67) distributed vertically are fixed to the inner side wall of the communication port between the U-shaped sedimentation box (6) and the drainage pipe (25), and two adjacent guide plates (67) are symmetrically arranged, and the tail ends of the two guide plates (67) overlap in the vertical direction; An impeller (68) is installed above the guide plate (67) at the uppermost end, one side of the impeller (68) is located below the connecting port between the U-shaped sedimentation box (6) and the drainage pipe (25), and the impeller (68) is rotatably connected to the inner wall of the U-shaped sedimentation box (6).

10. An industrial pure water preparation device, comprising the filtering mechanism for industrial pure water preparation according to any one of claims 1 to 9, characterized in that: The invention comprises a quartz sand filter (1), an activated carbon filter (2), a precision filter (3), a reverse osmosis device (4) and a sterilization device (5), wherein the quartz sand filter (1), the activated carbon filter (2), the precision filter (3), the reverse osmosis device (4) and the sterilization device (5) are connected in sequence through pipelines, the input end of the quartz sand filter (1) is connected to raw water, and the output end of the sterilization device (5) outputs industrial pure water.

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