Defluorination device for fluorine-containing wastewater

Abstract

The invention discloses a fluorine removal device for fluorine-containing wastewater, and belongs to the technical field of green environmental protection. The filtering device mainly comprises an outer tank, a resin cavity, a movable base, a baffle, a lower connecting pipe and an upper connecting pipe, the resin cavity is contained in an inner cavity of the outer tank, at least one first filtering cavity and at least one second filtering cavity are formed in the resin cavity, the first filtering cavity and the second filtering cavity are filled with chelating resin, and the tops of the first filtering cavity and the second filtering cavity are open; the baffle is movably arranged at the top end of the filter cavity I / the filter cavity II, and the baffle can be moved to close the top opening of the filter cavity II while opening the top opening of the filter cavity I, or the baffle can be moved to close the top opening of the filter cavity I while opening the top opening of the filter cavity II; the movable base is slidably arranged at the bottom of the resin cavity in the axial direction of the outer tank. The fluorine-containing wastewater defluorination device can solve the problem that the operation efficiency is influenced by the regeneration of chelate resin.

Description

Technical Field

[0001] This invention relates to the field of green environmental protection technology, specifically to a fluoride removal device for fluoride-containing wastewater. Background Technology

[0002] Chelating resin defluorination is a core technology for achieving highly selective and precise defluorination in advanced industrial wastewater treatment, especially suitable for scenarios with low fluoride content but stringent emission standards (e.g., ≤1 mg / L). Compared to traditional adsorption materials, chelating resins form stable coordination structures with fluoride ions through specific functional groups, exhibiting significant advantages such as strong anti-interference, large adsorption capacity, and easy regeneration. They have been widely applied in new energy, coal chemical, and mine water treatment fields.

[0003] In existing technologies, a fixed-bed adsorption column filled with chelating resin is used for dynamic operation. However, when the fluoride ions adsorbed by the chelating resin reach saturation, the machine needs to be shut down, the wastewater in the fixed bed containing the chelating resin needs to be drained, and then a regeneration solution needs to be injected into the fixed bed. The chelating resin is regenerated and its ability to adsorb fluoride ions is restored through ion exchange by soaking. Although it has the advantage of being regenerable, it has the problem of significantly affecting the efficiency of operation.

[0004] Therefore, it is necessary to provide a new type of defluoridation device for fluoride-containing wastewater. Summary of the Invention

[0005] Based on the aforementioned problems in the existing technology, the purpose of this invention is to provide a fluoride removal device for fluoride-containing wastewater, which can solve the problem that the regeneration of chelating resin affects the operating efficiency.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A fluoride removal device for fluoride-containing wastewater is provided, comprising an outer tank, a resin chamber, a movable base, a baffle, a lower connecting pipe, and an upper connecting pipe. The top of the outer tank is provided with an inlet, and the bottom of the outer tank is provided with a discharge outlet. The resin chamber is housed within the inner cavity of the outer tank and is located between the inlet and the discharge outlet. At least one filter chamber one and at least one filter chamber two are spaced apart along an axial direction perpendicular to the outer tank within the resin chamber. Both filter chamber one and filter chamber two are filled with chelating resin. The top of filter chamber one and filter chamber two are open, and the baffle is movably disposed within the filter chamber. At the top of filter chamber one / filter chamber two, the baffle can be moved to open the top opening of filter chamber one while simultaneously closing the top opening of filter chamber two, or vice versa. The movable base is slidably disposed at the bottom of the resin cavity along the axial direction of the outer tank. By moving the movable base up or down, the bottom opening of filter chamber one can be opened while simultaneously closing the bottom opening of filter chamber two, or vice versa. The lower pipe and the upper pipe are both connected to filter chamber one / filter chamber two.

[0007] Furthermore, the resin cavity is provided with at least three baffles, which are hinged to the outer edge of the top opening of the first filter cavity. When the two baffles on both sides of the outer edge of the opening of the first filter cavity flip and move away, opening the top opening of the first filter cavity, the two baffles on both sides of the outer edge of the opening of the adjacent second filter cavity flip and move closer to close. Alternatively, when the two baffles on both sides of the outer edge of the opening of the first filter cavity flip and move closer to close, the two baffles on both sides of the outer edge of the opening of the adjacent second filter cavity flip and move away, opening the top opening of the second filter cavity.

[0008] Furthermore, when the two baffles flip and come together to close, the two baffles arch up into an A-shape.

[0009] Furthermore, the baffle is a rectangular thin plate structure, and a plurality of insert fingers are arranged at intervals on one side of the baffle that is parallel to the hinge portion of the baffle. Slots are formed on the baffle between adjacent insert fingers, and the insert fingers of adjacent baffles are arranged in an alternating manner.

[0010] Furthermore, the bottom wall of the slot is formed by two inclined walls forming a wedge-shaped angled surface. When the baffle is flipped to the left to close with the left baffle, or flipped to the right to close with the right baffle, the upper inclined wall of the baffle makes surface contact with the insertion finger of the other baffle.

[0011] Furthermore, baffles are installed between the two outermost baffles on the inner wall of the outer can and the resin cavity, respectively. The baffles can contract elastically or expand under external force.

[0012] Furthermore, the upper surface of the movable base is provided with a side enclosure, and the bottom of the resin cavity is provided with a telescopic groove. The telescopic groove extends around the outer edge of the first filter cavity and the second filter cavity, and the side enclosure is slidably inserted into the telescopic groove.

[0013] Furthermore, the movable base is provided with a discharge port 1 at the bottom of the first filter chamber, and the movable base is provided with a discharge port 2 at the bottom of the second filter chamber. A plug 1 is provided above the discharge port 1 and is fixedly connected to the resin chamber. A plug 2 is provided below the discharge port 2. When the movable base moves away from the resin chamber and moves down to the first position, that is, the plug 1 moves away from and disengages from the discharge port 1, and at the same time, the plug 2 moves closer to and inserts into and closes the discharge port 2. When the movable base moves up closer to the resin chamber and moves up to the second position, that is, the plug 1 moves closer to and inserts into the discharge port 1, and at the same time, the plug 2 moves away from and disengages from the discharge port 2.

[0014] Furthermore, one end of the lower connecting pipe extends into the first filter chamber / second filter chamber and extends out as a head end one near the bottom of the first filter chamber / second filter chamber, and one end of the upper connecting pipe extends into the first filter chamber / second filter chamber and extends out as a head end two near the top of the first filter chamber / second filter chamber.

[0015] Furthermore, the lower connecting pipe extends into the tube body inside filter chamber one / filter chamber two and is connected to a conduit via a flexible hose. The conduit is fixedly connected to the movable base, with one end located at the lower end of the conduit and extending to the upper surface close to the movable base.

[0016] The beneficial effects of this invention are as follows: The fluoride removal device for fluoride-containing wastewater provided by this invention includes an outer tank, a resin chamber, a movable base, a baffle, a lower connecting pipe, and an upper connecting pipe. The top of the outer tank has an inlet, and the bottom has a outlet. The resin chamber is housed within the inner cavity of the outer tank and is located between the inlet and the outlet. When fluoride-containing wastewater is transported from the inlet to the inner cavity of the outer tank, chelating resin in the resin chamber upstream of the outlet captures and separates fluoride ions from the wastewater, thus reducing the fluoride ion content. The filtered wastewater is then discharged from the outlet. Furthermore, at least one filter chamber 1 and at least one filter chamber 2 are spaced apart along an axial direction perpendicular to the outer tank within the resin chamber. Both filter chamber 1 and filter chamber 2 are filled with… The system includes a chelating resin for defluorination. Filter chamber one / two has an opening at the inlet, i.e., the top opening of filter chamber one / two. A baffle is movably mounted at the top of filter chamber one / two. Moving the baffle allows it to simultaneously open the top opening of filter chamber one and close the top opening of filter chamber two, or vice versa. A movable base is slidably mounted along the axial direction of the outer tank at the outlet end of filter chamber one / two, i.e., at the bottom of the resin chamber. By moving the movable base up or down, it can simultaneously open the bottom opening of filter chamber one and close the bottom opening of filter chamber two. The bottom opening of the filter chamber is either closed at the bottom of filter chamber one or at the bottom of filter chamber two. Both the lower and upper connecting pipes are connected to filter chamber one / filter chamber two. This allows for the input of regeneration liquid into the chelating resin inside filter chamber one / filter chamber two through the lower and upper connecting pipes when the top and bottom openings of filter chamber one / filter chamber two are closed, thus regenerating the chelating resin and restoring its ability to adsorb fluoride ions. Therefore, the fluoride removal device for fluoride-containing wastewater provided by this invention, through the movement of the baffle and the up-and-down movement of the movable base, can selectively open the top and bottom openings of filter chamber one while simultaneously closing the top and bottom openings of filter chamber two. This allows filter chamber one to be used normally for filtering fluoride-containing wastewater, while at the same time, by closing the top and bottom openings of filter chamber two, the corresponding lower and upper connecting pipes can be used to regenerate the chelating resin. The chelating resin in filter chamber two is regenerated; alternatively, the upper and lower openings of filter chamber two are opened while the upper and lower openings of filter chamber one are closed, allowing filter chamber two to be used normally for filtering fluoride-containing wastewater, while the upper and lower openings of filter chamber one are closed. The chelating resin in filter chamber one is then regenerated using the corresponding lower and upper connecting pipes. In summary, by dividing the resin chamber into multiple filter chambers, and alternately switching between filter chamber one and filter chamber two to filter fluoride-containing wastewater while the other regenerates the chelating resin, the fluoride removal device for fluoride-containing wastewater provided in this embodiment of the invention can regenerate the chelating resin without stopping the machine during continuous defluorination operations, thus solving the problem that the regeneration of chelating resin affects the operating efficiency. 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 overall structure of the fluoride removal device for fluoride-containing wastewater provided in an embodiment of the present invention.

[0019] Figure 2 For along Figure 1 A cross-sectional view along the EE direction.

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of region A in the middle.

[0021] Figure 4 for Figure 2 Enlarged schematic diagram of region B in the middle.

[0022] Figure 5 for Figure 2 The diagram shows the structure of the fluoride removal device for fluoride-containing wastewater in another operating state.

[0023] Figure 6 This is a three-dimensional structural diagram of the fluoride removal device for fluoride-containing wastewater provided in an embodiment of the present invention, omitting the outer tank.

[0024] Figure 7 This is a cross-sectional schematic diagram of the movable base provided in an embodiment of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the resin cavity provided in an embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram of the structure when the two baffles are closed, as provided in an embodiment of the present invention.

[0027] Figure 10 for Figure 9 An exploded view of the structure shown.

[0028] Figure 11 for Figure 9 Left view of the structure shown.

[0029] Figure 12 for Figure 11 A cross-sectional view along the FF direction.

[0030] Figure 13 for Figure 11 A cross-sectional view along the GG direction.

[0031] Figure 14 for Figure 1 The right view of the fluoride removal device for fluoride-containing wastewater shown.

[0032] Figure 15 For along Figure 14 A cross-sectional view along the HH direction.

[0033] Figure 16 For along Figure 14 A cross-sectional view along the KK direction.

[0034] The reference numerals in the figures are as follows: 10, outer tank; 11, inlet; 12, outlet; 20, resin cavity; 21, filter cavity one; 22, filter cavity two; 23, filter plate; 24, expansion groove; 25, dike; 30, movable base; 31, side enclosure; 32, outlet one; 33, outlet two; 40, plug one; 41, mounting bracket one; 50, plug two; 60, baffle; 61, insertion finger; 62, slot; 63, inclined wall; 64, rotating shaft; 71, lower connecting pipe; 711, external connection one; 712, guide tube; 713, head end one; 72, upper connecting pipe; 721, external connection two; 722, head end two. Detailed Implementation

[0035] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0036] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0039] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0040] Please refer to Figures 1 to 16 As shown, the fluoride removal device for fluoride-containing wastewater provided by the present invention will now be described. This device includes an outer tank 10, a resin chamber 20, a movable base 30, a baffle 60, a lower connecting pipe 71, and an upper connecting pipe 72. The top of the outer tank 10 is provided with an inlet 11, and the bottom of the outer tank 10 is provided with a discharge port 12. The resin chamber 20 is housed within the inner cavity of the outer tank 10 and is located between the inlet 11 and the discharge port 12. When fluoride-containing wastewater is transported from the inlet 11 into the inner cavity of the outer tank 10, the chelating resin in the resin chamber 20 upstream of the discharge port 12 captures and separates the fluoride ions from the wastewater, thus reducing the fluoride ion content in the wastewater. The filtered wastewater is finally discharged from the discharge port 12. Figure 5 As shown, in addition, at least one filter chamber 21 and at least one filter chamber 22 are spaced apart along the axial direction perpendicular to the outer tank 10 in the resin chamber 20. Both filter chamber 21 and filter chamber 22 are filled with chelating resin for adsorption and defluorination. The ends of filter chamber 21 and filter chamber 22 facing the feed inlet 11 are open, i.e., the top openings of filter chamber 21 and filter chamber 22. A baffle 60 is movably disposed at the top of filter chamber 21 and filter chamber 22. Moving the baffle 60 allows it to open the top opening of filter chamber 21 while simultaneously closing the top opening of filter chamber 22, or vice versa. A movable base 30 is slidably disposed along the axial direction of the outer tank 10 at the end of filter chamber 21 and filter chamber 22 facing the discharge port 12, i.e., the movable base 30 is slidably disposed along the axial direction of the outer tank 10 at the bottom of the resin chamber 20. Figure 2 As shown, by moving the movable base 30 up or down, the bottom opening of the filter chamber 21 can be opened while the bottom opening of the filter chamber 22 is closed, or the bottom opening of the filter chamber 22 can be closed while the bottom opening of the filter chamber 22 is opened. Figure 15As shown, both the lower connecting pipe 71 and the upper connecting pipe 72 are connected to the first filter chamber 21 / second filter chamber 22. When the upper and lower openings of the first filter chamber 21 / second filter chamber 22 are closed, regeneration liquid is introduced into the chelating resin inside the first filter chamber 21 / second filter chamber 22 through the lower connecting pipe 71 / upper connecting pipe 72 for regeneration and to restore the chelating resin's ability to adsorb fluoride ions. Thus, through the above technical solution, the fluoride removal device for fluoride-containing wastewater provided in this embodiment of the invention, by moving the baffle 60 in conjunction with the up-and-down movement of the movable base 30, can selectively open the upper and lower openings of the first filter chamber 21 while simultaneously closing the upper and lower openings of the second filter chamber 22. This allows the first filter chamber 21 to be used normally for filtering fluoride-containing wastewater, while at the same time, by closing the upper and lower openings of the second filter chamber 22, the corresponding lower connecting pipe 71 and upper connecting pipe 72 are used to... The chelating resin in filter chamber 22 is regenerated; or, the upper and lower openings of filter chamber 22 are opened while the upper and lower openings of filter chamber 1 21 are closed, allowing filter chamber 22 to be used normally for filtering fluoride-containing wastewater, while the upper and lower openings of filter chamber 1 21 are closed. The chelating resin in filter chamber 1 21 is then regenerated using the corresponding lower connecting pipe 71 and upper connecting pipe 72. In summary, by dividing the resin chamber 20 into multiple filter chambers, and by alternately switching between filter chamber 1 21 and filter chamber 22 to filter fluoride-containing wastewater while the other chamber regenerates the chelating resin, the fluoride removal device for fluoride-containing wastewater provided in this embodiment of the invention can regenerate the chelating resin without stopping the machine during continuous defluorination operations, thus solving the problem that the regeneration of chelating resin affects the operating efficiency.

[0041] like Figure 6 As shown, in some embodiments, the resin cavity 20 has a rectangular cross-section, and the middle section of the outer tank 10 has a rectangular cross-section. The rectangular cross-section of the resin cavity 20 facilitates the equal division of the filter chamber 1 21 and filter chamber 22 in the resin cavity 20. At the same time, the filter chamber 1 21 and filter chamber 22 can be arranged in a straight line in the resin cavity 20, so that the side of each filter chamber 1 21 / filter chamber 22 close to the outer tank 10 is equidistant from the outer tank 10, so as to facilitate the inspection and maintenance of the filter chamber 1 21 / filter chamber 22 through the outer tank 10. The resin cavity 20 is housed and installed in the middle section of the outer tank 10. The resin cavity 20 and the outer tank 10 can be flexibly connected to reduce the vibration transmitted from the resin cavity 20 to the outer tank 10.

[0042] like Figure 2As shown, in some embodiments, the resin cavity 20 is provided with two filter chambers 21 and two filter chambers 22. The filter chambers 21 and 22 are alternately arranged along an axis perpendicular to the outer tank 10. The inlet 11 is located on the axis of the outer tank 10. When fluoride-containing wastewater is fed into the inner cavity of the outer tank 10 from the inlet 11, the fluoride-containing wastewater can cover most of the top-opening filter chambers 21 or 22 due to the alternating distribution of filter chambers 21 and 22, thus achieving uniform distribution of the fluoride-containing wastewater. In some embodiments, a uniform distribution plate (not shown) is also provided inside the outer tank 10 and above the resin cavity 20, so that the fluoride-containing wastewater falls from the inlet 11 onto the uniform distribution plate, is evenly distributed, and then falls into the resin cavity 20.

[0043] like Figure 15 and Figure 16 As shown, in some embodiments, one end of the lower connecting pipe 71 extends into the first filter chamber 21 / second filter chamber 22 and extends out to a head end 713 near the bottom of the first filter chamber 21 / second filter chamber 22. One end of the upper connecting pipe 72 extends into the first filter chamber 21 / second filter chamber 22 and extends out to a head end 722 near the top of the first filter chamber 21 / second filter chamber 22. Thus, when the upper and lower openings of the first filter chamber 21 or the second filter chamber 22 are closed, regenerant can be output to the first filter chamber 21 or the second filter chamber 22 through the lower connecting pipe 71 until the chelating resin in the first filter chamber 21 or the second filter chamber 22 is immersed in the regenerant. Through the immersion of the chelating resin and the regenerant, a regeneration reaction occurs, regenerating the chelating resin and restoring its ability to adsorb fluoride ions. The regenerant is then output to the first filter chamber 21 or the second filter chamber 22 through the lower connecting pipe 71. During the process, the pressure in filter chamber 1 21 or filter chamber 22 is maintained by venting through the upper pipe 72. It is understood that the lower pipe 71 is not limited to inputting or outputting fluid into filter chamber 1 21 or filter chamber 22. For example, before inputting regenerated liquid into filter chamber 1 21 or filter chamber 22, filtered water can be input into filter chamber 1 21 or filter chamber 22 through the lower pipe 71, while the filtered water mixed with the previous fluoride-containing wastewater is discharged and temporarily stored through the upper pipe 72. Filter chamber 1 21 or filter chamber 22 is rinsed clean by the bottom-in and top-out method. Alternatively, after inputting regenerated liquid into filter chamber 1 21 or filter chamber 22 and undergoing the regeneration reaction, the regenerated liquid wastewater is discharged through the lower pipe 71, and then filtered water is input through the lower pipe 71 and the filtered water mixed with the regenerated liquid wastewater is output through the upper pipe 72 by the bottom-in and top-out method.

[0044] like Figure 2As shown, in some embodiments, two filter plates 23 are arranged vertically spaced inside both filter chamber 1 21 and filter chamber 22, so that the chelating resin inside filter chamber 1 21 / filter chamber 22 is confined to the area formed between the two filter plates 23; more specifically, the upper filter plate 23 is located below the head end 722 of the upper pipe 72, and the lower filter plate 23 is located above the head end 713 of the lower pipe 71, which can prevent the chelating resin from leaking from the head end 713 or the head end 722.

[0045] like Figure 2 As shown, in some embodiments, at least three baffles 60 are provided on the resin cavity 20. One long side of the baffle 60 is hinged to the outer edge of the top opening of the filter cavity 21. When two baffles 60 located on both sides of the outer edge of the opening of the filter cavity 21 flip and move away, the top opening of the filter cavity 21 is opened. At the same time, two baffles 60 on both sides of the outer edge of the opening of the adjacent filter cavity 22 flip and move closer together, thereby closing the two baffles 60 and blocking the top opening of the filter cavity 22. Figure 5 As shown, when the two baffles 60 on both sides of the outer edge of the opening of the first filter chamber 21 flip and come together, the two baffles 60 close and block the top opening of the first filter chamber 21. At the same time, the two baffles 60 on both sides of the outer edge of the opening of the adjacent second filter chamber 22 flip and move away, thereby opening the top opening of the second filter chamber 22. Specifically, when the two baffles 60 flip and come together to close, the two baffles 60 arch into an A-shape. In this way, when the fluoride-containing wastewater falls onto the two baffles 60 that are close together at the top of the first filter chamber 21, the inclined upper surface of the baffles 60 causes the fluoride-containing wastewater to roll down to the top opening of the second filter chamber 22 on both sides. Or when the fluoride-containing wastewater falls onto the two baffles 60 that are close together at the top of the second filter chamber 22... At the same time, the inclined upper surface of the baffle 60 causes the fluoride-containing wastewater to roll down to the top opening of the filter chamber 21 on both sides. On the one hand, it plays a role in polymerizing the fluoride-containing wastewater falling from the feed inlet 11. On the other hand, the fluoride-containing wastewater falling from the feed inlet 11 applies downward pressure to the upper surface of the two closed baffles 60, which can promote the tight closure of the two baffles 60. This helps to counteract and avoid the possibility that the internal pressure difference will cause the baffles 60 to vibrate and flip up when the upper and lower openings of the filter chamber 21 / filter chamber 22 are closed, resulting in leakage from the upper opening. It can be understood that when the number of filter chambers 21 / filter chamber 22 is N (N is an integer), the number of baffles 60 set on the resin chamber 20 is 2N+1.

[0046] like Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13As shown, in some embodiments, the baffle 60 is a rectangular thin plate structure. Multiple interlocking fingers 61 are arranged at intervals on one side of the baffle 60 parallel to its hinge portion. Slots 62 are formed on the baffle 60 between adjacent interlocking fingers 61, and the interlocking fingers 61 of adjacent baffles 60 are staggered. Thus, when adjacent baffles 60 are brought together and closed, the interlocking fingers 61 of one baffle 60 will insert into the slots 62 of the other baffle 60, forming a tight sealing surface. Figure 12 and Figure 13 As shown, the bottom wall of the slot 62 is formed by two inclined walls 63 forming a wedge-shaped angled surface. In this way, whether the baffle 60 is flipped to the left to close with the left baffle 60 or flipped to the right to close with the right baffle 60, the upper inclined wall 63 of the baffle 60 will form a surface contact with the insertion finger 61 of the other baffle 60, reducing the impact of stress concentration and wear on the sealing effect.

[0047] like Figure 6 As shown, in some embodiments, the baffle 60 is hinged to the resin cavity 20 via a rotating shaft 64. One end of the rotating shaft 64 extends to the outside of the outer tank 10. It can be understood that the rotating shaft 64 can be connected to the drive unit via gears to control the baffle 60 to flip at a set angle according to a set position. In addition, the baffles 60 located on the same side of the filter cavity 1 21 / filter cavity 22 rotate synchronously in the same direction.

[0048] like Figure 6 As shown, in some embodiments, a weir 25 is provided at the upper end of the resin cavity 20. When the baffle 60 is flipped to close, the weir 25 seals the gap between the top opening of the filter cavity 1 21 / filter cavity 22 and the closed baffle 60, so that the weir 25 cooperates with the closed baffle 60 to seal the top opening of the filter cavity 1 21 / filter cavity 22.

[0049] In some embodiments, to address the sealing issue at the hinge joint between the baffle 60 and the resin cavity 20, a flexible sealing curtain (not shown) is connected to the two opposite surfaces of each baffle 60. The sealing curtain is also connected to the side surface of the resin cavity 20 adjacent to the baffle 60. The sealing curtains on both sides of the baffle 60 wrap around the hinge joint between the baffle 60 and the resin cavity 20 to seal the rotation gap.

[0050] like Figure 2 and Figure 5As shown, in some embodiments, to address the problem of leakage easily caused by the need for a clearance gap to be provided at the position where the resin cavity 20 is close to the inner wall of the outer tank 10 when the baffle 60 flips over, baffles 13 are respectively installed between the inner wall of the outer tank 10 and the two outermost baffles 60 on the resin cavity 20. The baffles 13 can be elastically contracted or expanded under external force, so that when the outermost baffle 60 on the resin cavity 20 flips over and approaches the inner wall of the outer tank 10, the baffles 13 can cover the gap between the outer tank 10 and the resin cavity 20 by their own contraction, thus preventing leakage of fluorine-containing waste. Water will not leak from the gap between the outer tank 10 and the resin cavity 20, or when the outermost baffle 60 on the resin cavity 20 flips and moves away from the inner wall of the outer tank 10, the baffle 13 can be pulled open and cover the gap between the outer tank 10 and the resin cavity 20, thus preventing the fluoride-containing wastewater from leaking from the gap between the outer tank 10 and the resin cavity 20; more precisely, the end of the baffle 13 connected to the outer tank 10 is higher than the end of the baffle 13 connected to the baffle 60, so that the baffle 13 can always remain in an inclined state, playing a role in polymerizing and guiding the fluoride-containing wastewater input from the inlet 11.

[0051] like Figure 7 As shown, the upper surface of the movable base 30 is provided with a side enclosure 31, such as... Figure 8 As shown, the bottom of the resin cavity 20 is provided with a telescopic groove 24. The telescopic groove 24 extends around the outer edge of the filter cavity 1 21 and the filter cavity 22. The side enclosure 31 is slidably inserted into the telescopic groove 24. Thus, on the one hand, the movable base 30 can slide relative to the resin cavity 20 along the axial direction of the outer tank 10. On the other hand, the side enclosure 31 and the telescopic groove 24 are separated by the cooperation between them.

[0052] like Figure 7 As shown, in some embodiments, the movable base 30 has a discharge port 32 located at the bottom of the first filter chamber 21, and the movable base 30 has a discharge port 33 located at the bottom of the second filter chamber 22, as shown. Figure 3 and Figure 4 As shown, a plug 40 is provided above the discharge port 32, and the plug 40 is fixedly connected to the resin cavity 20. A plug 50 is provided below the discharge port 33. Figure 2 As shown, when the movable base 30 moves away from the resin cavity 20 and down to the first position, the bottom opening of the first filter cavity 21 opens, while the bottom opening of the second filter cavity 22 closes. Specifically, the plug 40 moves away from and dislodges from the outlet 32, opening the outlet 32 ​​at the bottom of the first filter cavity 21, while the plug 50 moves closer to and inserts into and closes the outlet 33, closing the outlet 33 at the bottom of the second filter cavity 22. Figure 5As shown, when the movable base 30 moves to the second position near the resin cavity 20, the bottom opening of the filter cavity 1 21 is closed, while the bottom opening of the filter cavity 22 is open. Specifically, the plug 40 approaches and inserts into the discharge port 32, closing the discharge port 32 at the bottom of the filter cavity 1 21, while the plug 50 moves away from and exits the discharge port 33, opening the discharge port 33 at the bottom of the filter cavity 22.

[0053] like Figure 15 and Figure 16 As shown, in some embodiments, the movable base 30 is provided with a plurality of discharge ports 32 below each filter chamber 21, and a plurality of plugs 40 are provided above each discharge port 32. The plugs 40 are fixedly connected to the resin chamber 20 through the mounting bracket 41. The movable base 30 is provided with a plurality of discharge ports 33 below each filter chamber 22, and a plurality of plugs 50 are provided below each discharge port 33. The plugs 50 are fixedly connected to the outer tank 10 through the mounting bracket 51.

[0054] like Figure 7 As shown, in some embodiments, a wedge-shaped groove is recessed on the movable base 30 at the position of outlet 1 32 / outlet 2 33 so that the fluid can quickly converge at the position of outlet 1 32 / outlet 2 33.

[0055] In some embodiments, a fluoride ion concentration meter (not shown) is installed at the bottom of the movable base 30 to monitor the defluorination performance of the chelating resin in filter chamber 1 21 / filter chamber 22, thereby facilitating the selection of an appropriate time for regeneration.

[0056] like Figure 15 and Figure 16 As shown, in some embodiments, the lower pipe 71 extends into the pipe body of the filter chamber 1 21 / filter chamber 2 22 and is connected to the conduit 712 by a hose. The conduit 712 is fixedly connected to the movable base 30. The head end 713 is located at the lower end of the conduit 712 and extends to be close to the upper end face of the movable base 30, so that the head end 713 can always be located at the low position of the filter chamber 1 21 / filter chamber 2 22. The end of the lower pipe 71 extending to the outside of the outer tank 10 is provided with an external end 711. The external end 711 can be, but is not limited to, connected to multiple parallel pipes, so that the lower pipe 71 can input or output various fluids to the filter chamber 1 21 / filter chamber 2 22.

[0057] like Figure 15 and Figure 16As shown, in some embodiments, the upper pipe 72 extends to the outside of the outer tank 10 and is provided with an external terminal 721. The external terminal 721 may, but is not limited to, connect multiple parallel pipes so that the upper pipe 72 can input or output various fluids to the filter chamber 1 21 / filter chamber 2 22.

[0058] In some embodiments, a window (not shown) is provided on the outer side wall of the outer tank 10 near the middle section, penetrating and communicating with the first filter chamber 21, and a window is also provided on the outer side wall of the outer tank 10 near the middle section, penetrating and communicating with the second filter chamber 22. A door panel is installed on the window by an opening and closing mechanism so that when the chelating resin is close to its service life, the chelating resin in the first filter chamber 21 / second filter chamber 22 can be replaced through the window.

[0059] In some embodiments, by dividing the inner cavity of the resin cavity 20 with filter chamber 1 21 and filter chamber 22, the fluoride removal device for fluoride-containing wastewater provided by the present invention can achieve continuous operation compared with the traditional single fixed bed adsorption column design, and eliminates the need for multiple tank designs. Compared with the design of multiple fixed bed adsorption columns, it occupies less space and is convenient for single-person monitoring and maintenance.

[0060] In some embodiments, the chelating resin has the characteristic of being regenerable. The chelating resin is a chelating anion exchange resin. When the chelating resin adsorbs fluoride ions to saturation, aluminum sulfate / aluminum chloride solution can be used as a regeneration solution. The chelating resin is regenerated and its ability to adsorb fluoride ions is restored by immersion through ion exchange.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fluoride removal device for fluoride-containing wastewater, characterized in that: The system includes an outer tank, a resin cavity, a movable base, a baffle, a lower connecting pipe, and an upper connecting pipe. The top of the outer tank has a feed inlet, and the bottom has a discharge outlet. The resin cavity is housed within the inner cavity of the outer tank and lies between the feed inlet and the discharge outlet. At least one filter chamber 1 and at least one filter chamber 2 are spaced apart along an axial direction perpendicular to the outer tank within the resin cavity. Both filter chamber 1 and filter chamber 2 are filled with chelating resin. The top of filter chamber 1 and filter chamber 2 are open, and the baffle is movably disposed at the top of filter chamber 1 and filter chamber 2. The baffle can simultaneously open the top opening of filter chamber one and close the top opening of filter chamber two, or simultaneously close the top opening of filter chamber one and open the top opening of filter chamber two. The movable base is slidably disposed at the bottom of the resin cavity along the axial direction of the outer tank. By moving the movable base up or down, the bottom opening of filter chamber one can be opened and the bottom opening of filter chamber two can be closed, or the bottom opening of filter chamber one can be closed and the bottom opening of filter chamber two can be opened. The lower pipe and the upper pipe are both connected to filter chamber one / filter chamber two.

2. The fluoride removal device for fluoride-containing wastewater according to claim 1, characterized in that: At least three baffles are provided on the resin cavity. The baffles are hinged to the outer edge of the top opening of the first filter cavity. When the two baffles on both sides of the outer edge of the opening of the first filter cavity flip and move away, so that the top opening of the first filter cavity is open, the two baffles on both sides of the outer edge of the opening of the adjacent second filter cavity flip and move closer to close. Alternatively, when the two baffles on both sides of the outer edge of the opening of the first filter cavity flip and move closer to close, the two baffles on both sides of the outer edge of the opening of the adjacent second filter cavity flip and move away, so that the top opening of the second filter cavity is open.

3. The fluoride removal device for fluoride-containing wastewater according to claim 2, characterized in that: When the two baffles flip and come together to close, the two baffles arch up into an A-shape.

4. The fluoride removal device for fluoride-containing wastewater according to claim 1, characterized in that: The baffle is a rectangular thin plate structure. On one side of the baffle that is parallel to the hinge portion of the baffle, there are multiple interlocking fingers arranged at intervals. Slots are formed on the baffle between two adjacent interlocking fingers, and the interlocking fingers of two adjacent baffles are arranged in an alternating manner.

5. The fluoride removal device for fluoride-containing wastewater according to claim 4, characterized in that: The bottom wall of the slot is formed by two inclined walls forming a wedge-shaped angled surface. When the baffle is flipped to the left to close with the left baffle, or flipped to the right to close with the right baffle, the upper inclined wall of the baffle makes surface contact with the insertion finger of the other baffle.

6. The fluoride removal device for fluoride-containing wastewater according to claim 1, characterized in that: A retaining edge is installed between the two outermost baffles on the inner wall of the outer can and the resin cavity. The retaining edge can contract elastically or expand under external force.

7. The fluoride removal device for fluoride-containing wastewater according to claim 1, characterized in that: The upper surface of the movable base is provided with a side enclosure, and the bottom of the resin cavity is provided with a telescopic groove. The telescopic groove extends around the outer edge of filter cavity one and filter cavity two, and the side enclosure is slidably inserted into the telescopic groove.

8. The fluoride removal device for fluoride-containing wastewater according to claim 1, characterized in that: The movable base has a discharge port 1 at the bottom of the first filter chamber, and the movable base has a discharge port 2 at the bottom of the second filter chamber. A plug 1 is provided above the discharge port 1 and is fixedly connected to the resin chamber. A plug 2 is provided below the discharge port 2. When the movable base moves away from the resin chamber and moves down to the first position, that is, the plug 1 moves away from and disengages from the discharge port 1, and at the same time, the plug 2 moves closer to and inserts into and closes the discharge port 2. When the movable base moves up closer to the resin chamber and moves up to the second position, that is, the plug 1 moves closer to and inserts into the discharge port 1, and at the same time, the plug 2 moves away from and disengages from the discharge port 2.

9. The fluoride removal device for fluoride-containing wastewater according to claim 1, characterized in that: One end of the lower connecting pipe extends into the first filter chamber / second filter chamber and extends out as head end one near the bottom of the first filter chamber / second filter chamber. One end of the upper connecting pipe extends into the first filter chamber / second filter chamber and extends out as head end two near the top of the first filter chamber / second filter chamber.

10. The fluoride removal device for fluoride-containing wastewater according to claim 9, characterized in that: The lower connecting pipe extends into the filter chamber one / filter chamber two and is connected to a conduit via a flexible hose. The conduit is fixedly connected to the movable base, with one end located at the lower end of the conduit and extending to the upper surface close to the movable base.

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