A circulating water resource defluorination system

Abstract

The application discloses a circulating water resource defluorination system, which comprises a filter cartridge, the inside of the filter cartridge is filled with hydroxyapatite particles, the upper and lower parts of the filter cartridge are respectively connected with a water outlet pipe and a water inlet pipe, the positions, where the water outlet pipe and the water inlet pipe are communicated with the filter cartridge, are provided with mesh plates, one end of the filter cartridge is provided with a material supplementing device, and one end of the filter cartridge is provided with a material discharging device for discharging the hydroxyapatite particles filled in the filter cartridge and used for a period of time. The hydroxyapatite particles in the filter cartridge remove fluorine in underground water, meanwhile, the rod auger blade drives the hydroxyapatite particles in the material supplementing device to move towards the filter cartridge, so that the hydroxyapatite particles can be replaced, the removal efficiency of fluorine in underground water is strengthened, the removal efficiency of fluorine ions is improved, the water quality is further ensured, and the water treatment capacity of the device is remarkably increased.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, specifically a circulating water defluoridation system. Background Technology

[0002] Adsorption is currently the most widely used method for fluoride removal. Hydroxyapatite, as a highly efficient fluoride absorber, has a wide range of applications in the field of water treatment. The adsorption mechanism of hydroxyapatite makes it more suitable for the removal of fluoride from water.

[0003] Hydroxyapatite exists in the form of powder and spherical granular filter media, and has been used in some practical engineering projects. Powdered hydroxyapatite is often mixed with water to remove fluoride from the water, while granular hydroxyapatite often forms a filter media layer. When water flows through the filter media layer, the filter media layer composed of spherical hydroxyapatite removes fluoride from the water. However, how to make full use of the adsorption capacity of hydroxyapatite has become one of the bottlenecks restricting its widespread application.

[0004] During the use of hydroxyapatite, the defluorination surface of the hydroxyapatite will detach due to contact with fluoride-containing water. The detached part mixes in the hydroxyapatite filter layer and is difficult to remove, resulting in a decreasing defluorination effect of the hydroxyapatite filter layer. Furthermore, hydroxyapatite is a consumable, and the degree of consumption is difficult to control when dealing with groundwater with varying fluoride content. Therefore, a circulating water defluorination system is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a circulating water defluoridation system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a circulating water defluoridation system, comprising a filter cartridge, the interior of which is filled with hydroxyapatite particles. An inlet pipe and an outlet pipe are connected to the lower and upper parts of the filter cartridge, respectively. Mesh plates are installed at the points where the inlet and outlet pipes connect to the filter cartridge. The mesh plates separate the inner cavity of the filter cartridge from the inner cavities of the outlet and inlet pipes, ensuring that only water flow is possible between the inner cavity of the filter cartridge and the inner cavities of the outlet and inlet pipes, thus preventing the hydroxyapatite particles from entering the outlet and inlet pipes. One end of the filter cartridge is provided with a feeding device for adding new hydroxyapatite particles, and another end of the filter cartridge is provided with a discharge device for discharging the hydroxyapatite particles that have been used for one period of time from the filter cartridge.

[0007] Preferably, the feeding device includes a feeding pipe, which is fixedly connected to one end of the filter cartridge. A hopper for holding hydroxyapatite particles is connected above the feeding pipe. The lower end of the hopper is connected to the feeding pipe and is cone-shaped to facilitate the introduction of hydroxyapatite particles from the hopper into the interior of the feeding pipe. A rod-type auger blade is rotatably connected inside the feeding pipe to convey the hydroxyapatite particles from the hopper into the filter cartridge.

[0008] Preferably, the upper end of the material box is provided with a box cover, and by opening the box cover, hydroxyapatite particles can be poured into the material box.

[0009] Preferably, the discharge device includes a discharge pipe, which is fixedly connected to the end of the filter cylinder away from the conveying pipe.

[0010] Preferably, the circulation device includes a disc base, which is fixedly connected to the end of the discharge pipe away from the filter cartridge. The disc base has a cleaning chamber, and a rotating frame is rotatably connected inside the disc base. A horizontal shaft is fixedly installed in the middle of the disc base, and the rotating frame is rotatably sleeved on the horizontal shaft. A second motor is fixedly connected to the horizontal shaft, and the second motor is meshed with the rotating frame via teeth. When the second motor starts, it drives the rotating frame to rotate on the horizontal shaft. Multiple rollers are evenly rotatably connected to the rotating frame, and multiple mesh holes are evenly opened on each roller. The middle of each roller is rotatably connected to the rotating frame. Baffles are fixedly connected to the rotating frame at both ends of the rollers, and through holes are opened on the baffles relative to the ends of the rollers. The lowest roller communicates with the discharge pipe. A drive roller is rotatably connected to the lower end of the disc base. The drive roller can drive the lowest roller to rotate. A third motor is fixedly installed on the side wall of the disc base. The output shaft of the third motor is connected to the end of the drive roller. When the third motor starts, it will drive the drive roller to rotate. As the rotating frame rotates, when the roller rotates to the lowest position, the lowest roller is located inside the cleaning chamber. The middle part of the roller is in contact with the drive roller. At this time, when the drive roller rotates, it will drive the roller to rotate. A return pipe is provided between the top of the disc base and the material box. The uppermost roller is connected to the material box through the return pipe. An electric push rod is fixedly connected to the side wall of the disc base away from the return pipe. The output shaft of the electric push rod is connected to a push rod for pushing the hydroxyapatite particles in the uppermost roller to the return pipe.

[0011] Preferably, the side wall of the tray is provided with a feeding pipe for injecting polyaluminum chloride solution into the cleaning chamber, and the lower end of the tray is provided with an electric water valve for discharging polyaluminum chloride solution from the cleaning chamber.

[0012] Preferably, a sealing assembly is provided between the filter cylinder and the feed pipe, and between the filter cylinder and the discharge pipe. Each sealing assembly includes a sliding plate, a through hole, a lead screw, a guide rod, a motor, and a clamping plate. There are two clamping plates. The two clamping plates of the sealing assembly between the filter cylinder and the discharge pipe are respectively fixed to the ends of the filter cylinder and the discharge pipe, and a gap is left between the two clamping plates for the sliding plate to slide. The sliding plate is slidably connected between the two clamping plates. The through hole is opened on the side wall of the sliding plate. The lead screw is rotatably connected to the side wall of either clamping plate through the motor. The lower end of the sliding plate is engaged with the lead screw.

[0013] Preferably, a rubber sheet is provided on the slide plate near the feed pipe. When the through hole and the filter cylinder are intersected, the rubber sheet is aligned with the filter cylinder. The auger blades move the hydroxyapatite particles in the feed pipe toward the filter cylinder. The hydroxyapatite particles in the feed pipe are compressed by the rubber sheet, thereby adjusting the compactness of the hydroxyapatite particles in the filter cylinder to improve the defluorination quality of the hydroxyapatite particles in the filter cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention removes fluoride from groundwater by using hydroxyapatite particles in the filter cartridge, and at the same time introduces a rod-type auger blade to drive the hydroxyapatite particles in the feeding device to move towards the filter cartridge, so as to replace the hydroxyapatite particles, thereby enhancing the fluoride removal efficiency in groundwater, improving the fluoride ion removal efficiency, further ensuring higher effluent water quality, and significantly increasing the water treatment capacity of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0017] Figure 3 This is a cross-sectional view I of the filter cartridge, conveying pipe, discharge pipe and slide plate of the present invention;

[0018] Figure 4 This is a cross-sectional view II of the filter cartridge, conveying pipe, discharge pipe and slide plate of the present invention;

[0019] Figure 5 This is a cross-sectional view of the feeding device of the present invention;

[0020] Figure 6 This is an exploded view of the circulation device of the present invention;

[0021] Figure 7 This is a cross-sectional view of the filter cartridge, the rod-mounted auger blades, and the rubber sheet of the present invention;

[0022] Figure 8This is an exploded view of the enclosed component of the present invention.

[0023] In the diagram: 1. Filter cartridge, 2. Inlet pipe, 3. Outlet pipe, 4. Mesh plate, 5. Feeding device, 501. Conveying pipe, 502. Material box, 503. Screw auger blade, 504. First motor, 505. Box cover, 6. Discharge device, 601. Discharge pipe, 7. Circulation device, 701. Disc base, 702. Rotating frame, 703. Roller, 704. Horizontal shaft, 705. Second motor, 706. Baffle, 707. Drive roller, 708. Cleaning chamber, 709. Third motor, 7010. Return pipe, 7011. Electric push rod, 7012. Push rod, 7013. Feeding pipe, 7014. Electric water valve, 8. Sealing assembly, 801. Slide plate, 802. Through hole, 803. Lead screw, 804. Guide rod, 805. Motor, 806. Clamping plate, 9. Rubber sheet. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-8 This invention provides a technical solution: a circulating water defluoridation system, including a filter cartridge 1, the interior of which is filled with hydroxyapatite particles. An inlet pipe 2 and an outlet pipe 3 are connected to the lower and upper parts of the filter cartridge 1, respectively. Mesh plates 4 are installed at the points where the inlet pipe 2 and outlet pipe 3 connect to the filter cartridge 1. The mesh plates 4 separate the inner cavity of the filter cartridge 1 from the inner cavities of the inlet pipe 2 and outlet pipe 3, allowing only water flow between the inner cavities of the filter cartridge 1 and the inlet pipe 2 and outlet pipe 3, thus preventing the hydroxyapatite particles in the inner cavity of the filter cartridge 1 from entering the inlet pipe 2 and outlet pipe 3. A feeding device 5 is provided at one end of the filter cartridge 1 for adding new hydroxyapatite particles, and a discharge device 6 is provided at one end of the filter cartridge 1 for discharging the hydroxyapatite particles that have been used for one end of the time.

[0026] Hydroxyapatite particles are fed into the filter cartridge 1 via the feeding device 5, causing the filter cartridge 1 to be filled with hydroxyapatite particles. At this time, water from the inlet pipe 2 flows into the filter cartridge 1 and is filtered by the hydroxyapatite particles inside the filter cartridge 1. The hydroxyapatite particles adsorb fluoride in the water, thus removing the fluoride. The defluorinated water flows upward to the outlet pipe 3 and is discharged from the outlet pipe 3. After a period of use, a large amount of fluoride will be adsorbed on the surface of the hydroxyapatite particles inside the filter cartridge 1, causing the filter... When the hydroxyapatite particles in filter cartridge 1 lose their defluorination capacity, the feeding device 5 is used to power and replenish the filter cartridge 1 with new hydroxyapatite particles. The old hydroxyapatite particles (originally filled into filter cartridge 1) are squeezed out by the newly added hydroxyapatite particles, thus replacing the hydroxyapatite particles filled in filter cartridge 1 and restoring their defluorination capacity. This ensures that the defluorination effect of the hydroxyapatite particles in filter cartridge 1 remains within a stable range, effectively guaranteeing the defluorination effect on groundwater.

[0027] like Figure 5 As shown, in order to replenish the interior of the filter cartridge 1 with hydroxyapatite particles, specifically, the feeding device 5 includes a feeding pipe 501, which is fixedly connected to one end of the filter cartridge 1. A hopper 502 for holding hydroxyapatite particles is connected above the feeding pipe 501. The lower end of the hopper 502 communicates with the feeding pipe 501. The lower end of the hopper 502 is conical to facilitate the introduction of the hydroxyapatite particles from the hopper 502 into the feeding pipe 501. A rod-mounted auger blade 503 is rotatably connected inside the feeding pipe 501 to convey the hydroxyapatite particles from the hopper 502 into the filter cartridge 1. Figure 6 As shown, a first motor 504 is fixedly installed at the end of the conveying pipe 501. The output shaft of the first motor 504 is connected to the end of the rod auger blade 503. When the first motor 504 is started, the output shaft of the first motor 504 will drive the rod auger blade 503 to rotate. When the rod auger blade 503 rotates, it will transport the hydroxyapatite particles in the material box 502 along the conveying pipe 501, thereby filling the interior of the filter cartridge 1 with hydroxyapatite particles. The hydroxyapatite particles in the filter cartridge 1 defluorinate the water flowing through the filter cartridge 1, reducing the fluoride content in the water.

[0028] Specifically, the upper end of the material box 502 is provided with a box cover 505. By opening the box cover 505, hydroxyapatite particles can be poured into the material box 502.

[0029] like Figure 3As shown, in order to discharge the hydroxyapatite particles that have been used for a period of time in the filter cartridge 1, specifically, the discharge device 6 includes a discharge pipe 601, which is fixedly connected to the end of the filter cartridge 1 away from the feed pipe 501.

[0030] like Figure 1 , 2 As shown in Figure 6, in order to enable the recycling of hydroxyapatite particles and reduce the amount of hydroxyapatite particles used, specifically, the recycling device 7 includes a disc base 701, which is fixedly connected to the end of the discharge pipe 601 away from the filter cartridge 1. The disc base 701 is provided with a cleaning chamber 708, and a rotating frame 702 is rotatably connected inside the disc base 701. Figure 7 As shown, a horizontal shaft 704 is fixedly installed in the middle of the base 701. A rotating frame 702 is rotatably sleeved on the horizontal shaft 704, and a second motor 705 is fixedly connected to the horizontal shaft 704. The second motor 705 is meshed with the rotating frame 702 through teeth. When the second motor 705 starts, it will drive the rotating frame 702 to rotate on the horizontal shaft 704. Multiple rollers 703 are evenly rotatably connected to the rotating frame 702. Multiple mesh holes are evenly opened on the rollers 703, such as... Figure 7 As shown, the middle part of the roller 703 is rotatably connected to the rotating frame 702. Baffles 706 are fixedly connected to the rotating frame 702 at both ends of the roller 703. Through holes are opened on the baffles 706 relative to the ends of the roller 703. The lowermost roller 703 is connected to the discharge pipe 601. A drive roller 707 is rotatably connected to the lower end of the disc base 701. The drive roller 707 can drive the lowermost roller 703 to rotate. Figure 2 As shown, a third motor 709 is fixedly installed on the side wall of the tray 701. The output shaft of the third motor 709 is connected to the end of the drive roller 707, so that when the third motor 709 starts, it will drive the drive roller 707 to rotate. As the rotating frame 702 rotates, when the roller 703 rotates to the lowest position with the rotating frame 702, the lowest roller 703 is located inside the cleaning chamber 708, and the middle part of the roller 703 is in contact with the drive roller 707. At this time, when the drive roller 707 rotates, it will drive the roller 703 to rotate. A return pipe 7010 is provided between the top of the tray 701 and the material box 502. The uppermost roller 703 The return pipe 7010 is connected to the material box 502, and an electric push rod 7011 is fixedly connected to the side wall of the disc base 701 away from the return pipe 7010. The output shaft of the electric push rod 7011 is connected to a push rod 7012 for pushing the hydroxyapatite particles in the uppermost roller 703 to the return pipe 7010.

[0031] The cleaning chamber 708 contains a polyaluminum chloride solution. After the hydroxyapatite particles in filter cartridge 1 have been used for a period of time, the first motor 504 is started, causing the hydroxyapatite particles in the material box 502 to be fed into filter cartridge 1. The old hydroxyapatite particles are pushed into the discharge pipe 601 and conveyed to the bottom roller 703 through the discharge pipe 601. At this time, when replacing the hydroxyapatite particles in filter cartridge 1, the hydroxyapatite particles conveyed to roller 703 are simultaneously immersed in the polyaluminum chloride solution in the cleaning chamber 708. The drive roller 707 rotates the bottom roller 703 to realize the cleaning of the hydroxyapatite particles conveyed to roller 703. The hydroxyapatite particles are cleaned and defluorinated to remove the fluoride adsorbed on them, thus restoring their defluorination capacity. After a certain cleaning time, the second motor 705 drives the rotating frame 702 to rotate, causing the rotating frame 702 to move with the cleaned hydroxyapatite particles to the top and connect with the return pipe 7010. Then, by activating the electric push rod 7011, the electric push rod 7011 drives the push rod 7012 to slide, and the push rod 7012 pushes the hydroxyapatite particles in the drum 703 into the return pipe 7010. The return pipe 7010 then transports the particles to the material box 502, thereby realizing the recycling of hydroxyapatite particles.

[0032] Specifically, the side wall of the disc base 701 is provided with a feeding pipe 7013 for injecting polyaluminum chloride solution into the cleaning chamber 708, and the lower end of the disc base 701 is provided with an electric water valve 7014 for discharging polyaluminum chloride solution from the cleaning chamber 708.

[0033] like Figure 3 , 4 As shown in Figure 8, to prevent water flowing into the filter cartridge 1 from reaching the feed pipe 501 and discharge pipe 601 during defluorination of the hydroxyapatite particles in the filter cartridge 1, specifically, a sealing assembly 8 is provided between the filter cartridge 1 and the feed pipe 501, and between the filter cartridge 1 and the discharge pipe 601. Each sealing assembly 8 includes a sliding plate 801, a through hole 802, a lead screw 803, a guide rod 804, a motor 805, and a clamping plate 806. There are two clamping plates 806. Figure 8As shown, the sealing assembly 8 between the filter cartridge 1 and the discharge pipe 601 has two clamping plates 806 fixed to the ends of the filter cartridge 1 and the discharge pipe 601, respectively, with a gap between the two clamping plates 806 for the sliding plate 801 to slide. The sliding plate 801 is slidably connected between the two clamping plates 806. The through hole 802 is opened on the side wall of the sliding plate 801. The lead screw 803 is rotatably connected to the side wall of either clamping plate 806 via a motor 805. The lower end of the sliding plate 801 is engaged with... Connected to the lead screw 803, the motor 805 is fixedly mounted on the side wall of the corresponding clamping plate 806, and the output shaft of the motor 805 is connected to the end of the lead screw 803. When the motor 805 starts, the output shaft of the motor 805 drives the lead screw 803 to rotate. After the lead screw 803 rotates, it can push the slide plate 801 to slide. When sliding, it can change the position of the through hole 802, causing the through hole 802 to be adjusted to be aligned with or staggered with the filter cartridge 1. When the through hole 802 is staggered with the filter cartridge 1 (e.g. Figure 3 As shown), when using the hydroxyapatite particles in filter cartridge 1 for defluorination, the water flow in filter cartridge 1 will not flow towards the feed pipe 501 and the discharge pipe 601. Conversely, when the through hole 802 is aligned with filter cartridge 1 (as shown), the water flow will not flow towards the feed pipe 501 and the discharge pipe 601. Figure 4 As shown, the hydroxyapatite particles inside filter cartridge 1 can be replaced.

[0034] like Figure 7 As shown, when the through hole 802 intersects with the filter cartridge 1, in order to adjust the compactness of the hydroxyapatite particles in the filter cartridge 1 and improve the defluorination quality of the hydroxyapatite particles in the filter cartridge 1, specifically, a rubber sheet 9 is provided on the slide plate 801 near the side of the feed pipe 501. When the through hole 802 intersects with the filter cartridge 1, the rubber sheet 9 is aligned with the filter cartridge 1. After the rubber sheet 9 is aligned with the filter cartridge 1, the first motor 504 is started, causing the first motor 504 to drive the rod auger blades 503 to move the hydroxyapatite particles in the feed pipe 501 toward the filter cartridge 1. In this way, the hydroxyapatite particles in the feed pipe 501 are compressed by the rubber sheet 9, thereby adjusting the compactness of the hydroxyapatite particles in the filter cartridge 1 and improving the defluorination quality of the hydroxyapatite particles in the filter cartridge 1.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circulating water resource defluoridation system comprising a filter cartridge (1) having its interior filled with hydroxyapatite granules, characterized in that: The lower and upper parts of the filter cartridge (1) are respectively connected with a water inlet pipe (2) and a water outlet pipe (3), the positions of the water inlet pipe (2) and the water outlet pipe (3) communicating with the filter cartridge (1) are provided with a screen plate (4), one end of the filter cartridge (1) is provided with a feeding device (5) for filling new hydroxyapatite particles into the filter cartridge (1), and one end of the filter cartridge (1) is provided with a discharging device (6) for discharging the hydroxyapatite particles filled in the filter cartridge (1) and used for a period of time; the feeding device (5) comprises a feeding pipe (501), the feeding pipe (501) is fixedly connected to one end of the filter cartridge (1), the upper part of the feeding pipe (501) is connected with a material box (502) for containing the hydroxyapatite particles, the lower end of the material box (502) is communicated with the feeding pipe (501), and the inside of the feeding pipe (501) is rotatably connected with a rod auger blade (503). The discharging device (6) comprises a discharging pipe (601), the discharging pipe (601) is fixedly connected to one end of the filter cartridge (1) away from the feeding pipe (501), the defluorination system further comprises a circulating device (7), the circulating device (7) comprises a disc seat (701), the disc seat (701) is fixedly connected to one end of the discharging pipe (601) away from the filter cartridge (1), the disc seat (701) is provided with a cleaning cavity (708), the inside of the disc seat (701) is rotatably connected with a rotating frame (702), a plurality of rollers (703) are uniformly and rotatably connected to the rotating frame (702), a plurality of mesh holes are uniformly formed in the rollers (703), the lowermost roller (703) is communicated with the discharging pipe (601), the lower end of the disc seat (701) is rotatably connected with a driving roller (707), the driving roller (707) can drive the lowermost roller (703) to rotate, a return pipe (7010) is arranged between the upper part of the disc seat (701) and the material box (502), the uppermost roller (703) is communicated with the material box (502) through the return pipe (7010), an electric push rod (7011) is fixedly connected to the side wall of the disc seat (701) away from the return pipe (7010), a push rod (7012) is connected to the output shaft of the electric push rod (7011), the disc seat (701) is provided with a feeding pipe (7013) for injecting a polyaluminum chloride solution into the cleaning cavity, and the lower end of the disc seat (701) is provided with an electric water valve (7014) for discharging the polyaluminum chloride solution out of the cleaning cavity.

2. The system as claimed in claim 1, wherein the system is a cyclic water resource defluoridation system. The upper end of the material box (502) is provided with a box cover (505).

3. The system as claimed in claim 1, wherein the system further comprises: The filter cartridge (1) and the material feeding pipe (501), the filter cartridge (1) and the material discharging pipe (601) are provided with a sealing assembly (8), each sealing assembly (8) comprises a sliding plate (801), a through hole (802), a lead screw (803), a guide rod (804), a motor (805) and a clamping plate (806), the number of clamping plates (806) is two, the sliding plate (801) is slidably connected between the two clamping plates (806), the through hole (802) is formed in the side wall of the sliding plate (801), the lead screw (803) is rotatably connected to the side wall of any clamping plate (806) through the motor (805), and the lower end of the sliding plate (801) is engagedly connected to the lead screw (803).

4. A circulating water defluoridation system according to claim 3, characterized in that: The sliding plate (801) on the side close to the material feeding pipe (501) is provided with a rubber sheet (9), and when the through hole (802) is staggered with the filter cartridge (1), the rubber sheet (9) is aligned with the filter cartridge (1).

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