Special low-pressure selective membrane filtration nitrate removal device

Abstract

This application discloses a special low-pressure selective membrane filtration device for nitrate removal, belonging to the field of environmental protection technology. It includes a storage tank with a cover plate on top; a rotating rod rotatably disposed inside the storage tank, driven by an external force to rotate within the tank; and a bag-supporting mechanism disposed on both sides of the rotating rod for opening the filter bag opening. Because this application employs the bag-supporting mechanism, the opening of the filter bag allows for the collection and treatment of impurities in nitrate wastewater. This reduces the problem of some suspended particles, colloids, sludge, and other insoluble substances in the wastewater settling to the bottom of the tank under gravity, thus preventing the formation of a sediment layer that occupies the storage volume of the storage tank and may even clog the processor's inlet. Simultaneously, the rotation of the rotating rod increases the flow rate of the wastewater, improving the filter bag's impurity collection efficiency.

Description

Technical Field

[0001] This application relates to the field of environmental protection technology, and more specifically, to a special low-pressure selective membrane filtration device for nitrate removal. Background Technology

[0002] A membrane filtration nitrate removal device is a device used to remove nitrates from water. It utilizes the properties of a semi-permeable membrane, under pressure, water is forced through the semi-permeable membrane while solutes such as nitrates are retained, thereby achieving the purpose of removing nitrates.

[0003] The special low-pressure selective membrane filtration nitrate removal device is a highly efficient water treatment equipment. Its core advantages lie in low-pressure operation and high selectivity for nitrate removal. Compared with traditional membrane filtration technologies such as reverse osmosis, the special low-pressure selective membrane filtration device operates at a lower pressure, which can reduce energy consumption and equipment operating costs.

[0004] However, nitrate wastewater often contains a large number of suspended particles, colloids, sludge and other insoluble impurities. When stored statically or in a low-speed flow state in the storage tank, these impurities are easily settled to the bottom of the tank by gravity. After long-term accumulation, they will form a dense sediment layer. This sediment layer will not only occupy a large amount of the effective storage volume of the storage tank, but the sludge in the sediment layer will also easily cause problems such as pipe blockage and poor pipeline flow.

[0005] In view of this, we propose a special low-pressure selective membrane filtration device for nitrate removal. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this application proposes a special low-pressure selective membrane filtration device for nitrate removal.

[0007] This application provides a special low-pressure selective membrane filtration device for nitrate removal, including:

[0008] A liquid storage tank, the top of which is provided with a cover plate;

[0009] A rotating rod is rotatably mounted inside the liquid storage tank, and the rotating rod is driven to rotate inside the liquid storage tank by an external force;

[0010] The bag-supporting mechanism, located on both sides of the rotating rod, is used to open the filter bag opening;

[0011] The bag-supporting mechanism includes two fixed frames on both sides of the rotating rod. Several top blocks A are fixedly connected to the top of the fixed frames, and top blocks A are slidably connected to the bottom of the fixed frames. Several top blocks B are provided at the bottom of the top blocks A. Both top blocks A and top blocks B are used to open the filter bag opening.

[0012] As an optional solution to the technical solution of this application, the bag-supporting mechanism further includes two connecting rods fixed to the top of the movable frame. The two connecting rods are slidably connected inside the fixed frame. A disassembly plate is fixedly connected to the top of the connecting rod. Two limiting blocks A are fixedly connected to the top of the disassembly plate. A locking plate is slidably connected to the top of the connecting rod through the two limiting blocks A. A locking groove is opened on one side of the fixed frame. The locking groove and the locking plate are plugged into each other. A fixing plate is fixedly connected to the end of the fixed frame. The fixing plate is fixedly connected to the side wall of the rotating rod.

[0013] As an optional solution to the technical solution of this application, the movable frame has an inner groove, a spring is provided in the inner groove, an expansion plate is fixedly connected to the top of the top block B, the expansion plate is slidably connected inside the inner groove, and the spring is located at the top of the expansion plate.

[0014] As an optional solution to the technical solution of this application, the top of the movable frame is fixedly connected to a pressure plate by multiple bolts, and the bottom of the pressure plate is fixedly connected to a number of limiting blocks B, each of the limiting blocks B corresponding to a spring, and the spring is detachably installed inside the inner groove.

[0015] As an optional solution to the technical solution of this application, a motor is installed at the bottom of the liquid storage tank, the output shaft of the motor is fixedly connected to the rotating rod, a support plate is fixedly connected to the outer wall of the cover plate, a fixing frame is fixedly connected to the bottom of the support plate, a base is fixedly connected to the bottom of the fixing frame, a processor is installed on the top of the base, a pipe is installed on the side wall of the processor, and the other end of the pipe is fixedly connected to the liquid storage tank.

[0016] As an optional solution to the technical solution in this application, the contact surfaces of the card plate and the card slot are provided with friction elements.

[0017] As an optional solution to the technical solution of this application, a connecting frame is fixedly connected to the bottom of the rotating rod, and a scraper is fixedly connected to one side of the connecting frame. The scraper is inclined upward and is in contact with the bottom wall of the storage tank.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] (1) This application uses a bag-supporting mechanism. By opening the filter bag with the bag-supporting mechanism, impurities in nitrate wastewater can be collected and treated. This reduces the problem that some suspended particles, colloids, sludge and other insoluble substances in the wastewater will sink to the bottom of the tank under gravity, and the resulting sediment layer will occupy the storage volume in the storage tank and even block the processor port. At the same time, the flow rate of the wastewater can be increased by the rotation of the rotating rod, which improves the collection effect of the filter bag on impurities.

[0020] (2) By using the sliding top block B, this application can improve the flexibility when supporting the bag opening, reduce the damage to the bag opening caused by the large squeezing force when the fixed top block B supports the bag opening, and reduce the problem of unstable fixation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a special low-pressure selective membrane filtration nitrate removal device disclosed in a preferred embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the storage tank structure of a special low-pressure selective membrane filtration nitrate removal device disclosed in a preferred embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the bag support mechanism of a special low-pressure selective membrane filtration nitrate removal device disclosed in a preferred embodiment of this application;

[0024] Figure 4 for Figure 3 Enlarged view of point A;

[0025] Figure 5 This is a schematic diagram of the pressure plate structure of a special low-pressure selective membrane filtration nitrate removal device disclosed in a preferred embodiment of this application;

[0026] The following are the labels in the diagram: 1. Storage tank; 11. Cover plate; 12. Support plate; 13. Fixing frame; 14. Base; 15. Processor; 16. Pipeline; 2. Rotating rod; 21. Motor; 3. Bag supporting mechanism; 31. Fixing frame; 32. Top block A; 33. Movable frame; 331. Inner groove; 332. Spring; 34. Top block B; 341. Expanding plate; 35. Connecting rod; 36. Disassembly plate; 37. Limiting block A; 38. Card plate; 39. Card slot; 310. Fixing plate; 4. Pressure plate; 41. Limiting block B; 5. Connecting frame; 51. Scraper. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1-5This application discloses a special low-pressure selective membrane filtration device for nitrate removal, comprising a storage tank 1, a rotating rod 2, and a bag-supporting mechanism 3. The storage tank 1 has a cover plate 11 on its top. The rotating rod 2 is rotatably disposed inside the storage tank 1 and is driven to rotate within the storage tank 1 by an external force. The rotating rod 2 is positioned on both sides of the rotating rod 2 to open the filter bag opening. The bag-supporting mechanism 3 includes two fixed frames 31 on both sides of the rotating rod 2. Several top blocks A32 are fixedly connected to the top of the fixed frames 31, and top blocks A32 are slidably connected to the bottom of the fixed frames 31. Several top blocks B34 are disposed at the bottom of top blocks A32. Both top blocks A32 and top blocks B34 are used to open the filter bag opening. The bag-supporting mechanism 3 also includes two connecting rods 35 fixed to the top of a movable frame 33. The two connecting rods 35 are slidably connected inside the fixed frames 31. A disassembly plate 36 is fixedly attached to the top, and two limiting blocks A37 are fixedly attached to the top of the disassembly plate 36. A locking plate 38 is slidably connected to the top of the connecting rod 35 through the two limiting blocks A37. A locking groove 39 is opened on one side of the fixing frame 31, and the locking groove 39 and the locking plate 38 are plugged into each other. A fixing plate 310 is fixedly attached to the end of the fixing frame 31, and the fixing plate 310 is fixedly connected to the side wall of the rotating rod 2. A motor 21 is installed at the bottom of the liquid storage tank 1, and the output shaft of the motor 21 is fixedly connected to the rotating rod 2. A support plate 12 is fixedly attached to the outer wall of the cover plate 11. A fixing frame 13 is fixedly attached to the bottom of the support plate 12. A base 14 is fixedly attached to the bottom of the fixing frame 13. A processor 15 is installed on the top of the base 14. A pipe 16 is installed on the side wall of the processor 15, and the other end of the pipe 16 is fixedly connected to the liquid storage tank 1. Friction parts are provided on the contact surface of the locking plate 38 and the locking groove 39.

[0029] After the base 14 is installed and fixed, the operator can pull the disassembly plate 36 upwards to reduce the distance between the movable frame 33 and the fixed frame 31. Then, the filter bag opening can be fitted between the top block A32 and the top block B34. Next, the connecting rod 35 is pressed down again, causing its bottom to fit against the fixed frame 31. The two limit blocks A37 drive the card plate 38 to slide horizontally into the card slot 39 until it is locked in place. The friction components on the outer wall of the card plate 38 stabilize its position. Simultaneously, several top blocks B34 at the bottom support the bottom of the bag opening, opening and supporting the filter bag. The wastewater to be treated can then be poured into the storage tank 1, and the cover 11 closed. After starting the processor 15, wastewater can be drawn into the processor 15 through the pipe 16. After starting the motor 21 switch, the rotating rod 2 moves the two filter bags. The filter bag rotates and, under the action of centrifugal force, the two clamping plates 38 can be stably locked in the clamping slots 39. At the same time, the unfolded filter bag can collect floating objects and large impurities in the wastewater. When it is necessary to remove the filter bag later, the movable frame 33 can be moved upward again to remove the support for the filter bag and complete the subsequent disassembly. This step, together with the bag support mechanism 3, opens the filter bag, which can collect and treat impurities in the nitrate wastewater. It reduces the problem that some suspended particles, colloids, sludge and other insoluble substances in the wastewater will sink to the bottom of the tank under the action of gravity, and the resulting sediment layer will occupy the storage volume in the storage tank 1 and even block the port of the processor 15. At the same time, under the action of the rotating rod 2, the flow rate of the wastewater can be increased, which can improve the collection effect of the filter bag on impurities. Under the action of the friction parts, the contact stability of the clamping plates 38 and the clamping slots 39 can be improved. Combined with centrifugal force, the problem of the filter bag loosening during rotation can be avoided.

[0030] Reference Figures 1-5 The movable frame 33 has an inner groove 331 inside, and a spring 332 is installed inside the inner groove 331. The top of the top block B34 is fixedly connected to the expansion plate 341, which is slidably connected inside the inner groove 331. The spring 332 is located at the top of the expansion plate 341. The top of the movable frame 33 is fixedly connected to the pressure plate 4 by multiple bolts. Several limit blocks B41 are fixedly connected to the bottom of the pressure plate 4. The limit blocks B41 are all set corresponding to the spring 332. The spring 332 is detachable inside the inner groove 331.

[0031] By making the top block B34 a sliding device, and using the spring 332 on its top, the pressure generated at the bag opening when the top block B34 supports the filter bag opening can deform the spring 332, allowing the expansion plate 341 to slide within the inner groove 331 and flexibly adjust the support for the bag opening. When the spring 332 needs to be replaced later, the multiple bolts on the pressure plate 4 can be removed, and the pressure plate 4 and the spring 332 can be removed. When the pressure plate 4 is in use, the unfolded limiting block B41 can also limit the use of the spring 332. This step, combined with the sliding top block B34, can improve the flexibility when supporting the bag opening, reduce the damage to the bag opening caused by the large compression force when the fixed top block B34 supports the bag opening, and reduce the problem of insecure fixation. At the same time, the limiting block B41 can improve the stability of the spring 332 during use, and the pressure plate 4 facilitates the replacement or maintenance of multiple springs 332.

[0032] Reference Figures 1-5 A connecting frame 5 is fixed to the bottom of the rotating rod 2, and a scraper 51 is fixed to one side of the connecting frame 5. The scraper 51 is inclined upwards and is in contact with the bottom wall of the storage tank 1. By setting the connecting frame 5 on the outer wall of the rotating rod 2, the scraper 51 can be driven to rotate simultaneously when the rotating rod 2 rotates. The scraper 51 is inclined and can lift some impurities at the bottom upwards. After this step is combined with the scraper 51 to lift the impurities, the problem of impurities that are not collected by the filter bag at the bottom of the storage tank 1 can be reduced. At the same time, the impurities can be collected again by the filter bag after being lifted.

[0033] In summary, when using the special low-pressure selective membrane filtration nitrate removal device disclosed in this application embodiment, after the base 14 is installed and fixed, the operator can pull the disassembly plate 36 upwards in sequence to reduce the gap between the movable frame 33 and the fixed frame 31. Then, the filter bag opening can be fitted between the top block A32 and the top block B34. Next, the connecting rod 35 is pressed down again, so that the bottom of the connecting rod 35 fits against the fixed frame 31. Then, the two limiting blocks A37 drive the locking plate 38 to slide horizontally into the locking groove 39. Move the filter bag until it is locked in the slot 39. This, combined with the friction components on the outer wall of the card plate 38, stabilizes the card plate 38. Simultaneously, several top blocks B34 at the bottom support the bottom of the bag opening, opening and supporting the filter bag. Then, the wastewater to be treated can be poured into the storage tank 1, and the cover 11 can be closed. After starting the processor 15, wastewater can be drawn into the processor 15 through the pipe 16. After starting the motor 21 switch, the rotating rod 2 drives the two filter bags to rotate, and under centrifugal force... Under the action of the two clamping plates 38, they can be stably clamped in the clamping slot 39. At the same time, the unfolded filter bag can collect floating objects and large impurities in the wastewater. When it is necessary to remove the filter bag, the movable frame 33 can be moved upward again to remove the support for the filter bag and complete the subsequent disassembly. By making the top block B34 sliding, in combination with the spring 332 on its top, the pressure generated at the bag opening when the top block B34 supports the bag opening can compress the spring 332, allowing the expansion plate 341 to enter the inner groove 331. The slide is flexible and the support of the bag opening can be adjusted. When the spring 332 needs to be replaced, the multiple bolts on the pressure plate 4 can be removed, and the pressure plate 4 and spring 332 can be removed. When the pressure plate 4 is in use, the unfolded limiting block B41 can also limit the use of spring 332. By setting the connecting frame 5 on the outer wall of the rotating rod 2, the rotating rod 2 can drive the scraper 51 to rotate at the same time. The scraper 51 has an inclined structure, which can lift some impurities at the bottom upward.

Claims

1. A special low-pressure selective membrane filtration device for nitrate removal, characterized in that, Include: A liquid storage tank (1) is provided with a cover plate (11) on the top of the liquid storage tank (1). A rotating rod (2) is rotatably installed inside the liquid storage tank (1). The rotating rod (2) is driven by an external force to rotate inside the liquid storage tank (1). The bag-supporting mechanism (3) is set on both sides of the rotating rod (2) and is used to open the bag opening of the filter bag; The bag-supporting mechanism (3) includes two fixed frames (31) on both sides of the rotating rod (2). Several top blocks A (32) are fixedly connected to the top of the fixed frame (31), and the top blocks A (32) are slidably connected to the bottom of the fixed frame (31). Several top blocks B (34) are provided at the bottom of the top blocks A (32). Both the top blocks A (32) and the top blocks B (34) are used to open the filter bag opening.

2. The special low-pressure selective membrane filtration device for nitrate removal according to claim 1, characterized in that: The bag-supporting mechanism (3) also includes two connecting rods (35) fixed to the top of the movable frame (33). The two connecting rods (35) are slidably connected inside the fixed frame (31). A disassembly plate (36) is fixedly connected to the top of the connecting rod (35). Two limiting blocks A (37) are fixedly connected to the top of the disassembly plate (36). A card plate (38) is slidably connected to the top of the connecting rod (35) through the two limiting blocks A (37). A card slot (39) is opened on one side of the fixed frame (31). The card slot (39) and the card plate (38) are plugged into each other. A fixed plate (310) is fixedly connected to the end of the fixed frame (31). The fixed plate (310) is fixedly connected to the side wall of the rotating rod (2).

3. The special low-pressure selective membrane filtration device for nitrate removal according to claim 2, characterized in that: The movable frame (33) has an inner groove (331) inside, and a spring (332) is provided in the inner groove (331). The top block B (34) is fixedly connected to the top of the expansion plate (341), and the expansion plate (341) is slidably connected inside the inner groove (331). The spring (332) is located at the top of the expansion plate (341).

4. The special low-pressure selective membrane filtration device for nitrate removal according to claim 3, characterized in that: The top of the movable frame (33) is fixedly connected to a pressure plate (4) by multiple bolts. Several limit blocks B (41) are fixedly connected to the bottom of the pressure plate (4). Each of the limit blocks B (41) corresponds to a spring (332). The spring (332) is detachably installed inside the inner groove (331).

5. The special low-pressure selective membrane filtration device for nitrate removal according to claim 1, characterized in that: A motor (21) is installed at the bottom of the liquid storage tank (1). The output shaft of the motor (21) is fixedly connected to the rotating rod (2). A support plate (12) is fixedly connected to the outer wall of the cover plate (11). A fixing frame (13) is fixedly connected to the bottom of the support plate (12). A base (14) is fixedly connected to the bottom of the fixing frame (13). A processor (15) is installed on the top of the base (14). A pipe (16) is installed on the side wall of the processor (15). The other end of the pipe (16) is fixedly connected to the liquid storage tank (1).

6. The special low-pressure selective membrane filtration device for nitrate removal according to claim 2, characterized in that: Friction elements are provided on the contact surfaces of the card plate (38) and the card slot (39).

7. The special low-pressure selective membrane filtration device for nitrate removal according to claim 1, characterized in that: The bottom of the rotating rod (2) is fixedly connected to a connecting frame (5), and a scraper (51) is fixedly connected to one side of the connecting frame (5). The scraper (51) is inclined upwards and is in contact with the bottom wall of the liquid storage tank (1).

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