A resin adsorption device for removing fluorine from sewage

Abstract

The present application relates to a kind of resin adsorption device for sewage defluorination, including adsorption column and the transverse disturbance mechanism and longitudinal disturbance mechanism inside adsorption column, and defluorination resin is loaded in adsorption column;Transverse disturbance mechanism includes several spiral rotating guide rails arranged from top to bottom and a stirring rod, rotating guide rail is horizontally arranged, and stirring rod vertically penetrates several rotating guide rails, and can move along rotating guide rail, to loosen the resin bed in adsorption column laterally;Longitudinal disturbance mechanism includes several longitudinal guide rail groups, longitudinal guide rail group includes two vertical longitudinal guide rails, the height and length of two longitudinal guide rails are same, two longitudinal guide rails are symmetrically arranged on the inner wall of adsorption column with the center of adsorption column as center, and a openable and closable moving plate is slidably connected on each longitudinal guide rail, for loosening the resin bed in adsorption column up and down.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and specifically relates to a resin adsorption device for defluorination of wastewater. Background Technology

[0002] Currently, in zero-discharge wastewater processes such as reclaimed water reuse, mine water treatment, or desulfurization wastewater treatment, raw water undergoes pretreatment processes including chemical dosing, flocculation and sedimentation, filtration, membrane concentration, and nanofiltration for salt separation. The reduced-volume concentrate is then evaporated and crystallized to obtain salt as a byproduct, while the distilled water is recycled and reused. In this water treatment process, fluoride ions accumulate in the final concentrate. When the fluoride ion concentration exceeds a certain level, such as greater than 10 mg / L, it will corrode the evaporation and crystallization equipment, affecting the efficiency and lifespan of the system, potentially paralyzing the entire water treatment production line, resulting in significant energy waste, environmental pollution, and economic losses.

[0003] Currently, the main methods for defluoridation of wastewater include adsorption filtration, coagulation sedimentation, and ion exchange. Adsorption filtration uses filter media such as activated carbon, ceramics, or polymers. However, it has low defluoridation efficiency and cannot effectively reduce the concentration of fluoride ions in wastewater. Coagulation sedimentation uses slaked lime to react with fluoride in the wastewater to form a precipitate. Flocculants and coagulants are then added to accelerate the sedimentation and separation, removing fluoride ions from the wastewater. However, coagulation sedimentation is limited by the selectivity and reaction time of the reaction, resulting in low defluoridation efficiency and the generation of large amounts of sludge. Ion exchange utilizes specific resins to adsorb fluoride ions from the water. However, during resin adsorption, elution, and regeneration, the resin bed often experiences localized collapse, bubbling, and uneven resin distribution, severely affecting the uniformity of the flow of wastewater, eluent, or regenerated liquid within the resin bed, thus impacting the overall utilization rate of the bed. Summary of the Invention

[0004] To address the above problems, the present invention provides a resin adsorption device for defluorination of wastewater, comprising an adsorption column and a transverse disturbance mechanism and a longitudinal disturbance mechanism inside the adsorption column, wherein the adsorption column is filled with defluorination resin.

[0005] The transverse disturbance mechanism includes several spiral rotating guide rails arranged from top to bottom and a stirring rod. The rotating guide rails are arranged horizontally, and the stirring rod passes vertically through several rotating guide rails and can move along the rotating guide rails, thereby loosening the resin bed in the adsorption column laterally.

[0006] The longitudinal disturbance mechanism includes several longitudinal guide rail groups. Each longitudinal guide rail group includes two vertically arranged longitudinal guide rails with the same height and length. The two longitudinal guide rails are symmetrically arranged on the inner wall of the adsorption column with the center of the column as the center. Each longitudinal guide rail is slidably connected to a movable plate that can be opened, closed and rotated, which is used to loosen the resin bed in the adsorption column by moving it up and down.

[0007] Optionally, the adsorption column is a hollow cylinder filled with resin to form a resin bed.

[0008] Optionally, the several rotating guide rails of the transverse disturbance mechanism are evenly arranged along the height direction of the resin bed, with a separate rotating guide rail above the resin bed and a separate rotating guide rail at the bottom of the resin bed.

[0009] The rotating guide rail is arranged around the center of the adsorption column at equal intervals for several turns until it reaches and is fixedly connected to the inner wall of the adsorption column, so that the rotating guide rail is spiral in shape.

[0010] The stirring rod is slidably connected to the rotating guide rail via a traction device, and the stirring rod always remains in a vertical position.

[0011] Alternatively, the stirring rod may be curved in the horizontal direction, so that the stirring rod can be adapted to the curved rotating guide rail and the inner wall of the adsorption column.

[0012] Further optionally, the traction device is connected to a rotating guide rail and has an arc along the rotating guide rail; the traction device includes a housing and an internal motor mechanism, the outer side of the housing is provided with side one, side two, side three and side four in a clockwise direction, the side is sleeved on the side of the rotating guide rail facing the center of the adsorption column, a part of the roller of the motor mechanism is outside side one, the roller contacts the side of the rotating guide rail, and is used to drive the traction device and the stirring rod to move.

[0013] The stirring rod is fixedly connected to the third side, and the second and fourth sides are equipped with at least one layer of wedge-shaped shovels, which makes it easy to loosen the surrounding resin bed when the traction device moves.

[0014] Optionally, the wedge-shaped shovel is a rubber sheet with a certain hardness, which can loosen the resin layer in the forward direction of the traction device while avoiding damage to the resin particles; the height of the wedge-shaped shovel is not less than the height of the rotating guide rail, so that the wedge-shaped shovel can clean and remove all the resin on the forward track of the traction device.

[0015] One side of the wedge-shaped shovel is fixedly connected to side two or side four, and the other side contacts the side of the rotating guide rail facing the center of the adsorption column. The contact point formed is the tangent point, and the tangent on the rotating guide rail surface corresponding to the tangent point forms an angle with the wedge-shaped shovel.

[0016] The upper and lower surfaces of the wedge-shaped spade are sealed to prevent resin from entering between the wedge-shaped spade and the outer shell.

[0017] Optionally, a rotating guide rail is provided between two adjacent vertical guide rail groups; in all the two symmetrically arranged vertical guide rails of all the vertical guide rail groups, one side of the vertical guide rails are all located on the same vertical line, and the other side of the vertical guide rails are located on another vertical line; the angle between the line connecting the corresponding point of these two vertical lines on the cross-section of the adsorption column and the center of the cross-section is 180 degrees, and the angle between the line connecting the corresponding point of the stirring rod on the cross-section and the center of the cross-section is 90 degrees.

[0018] Optionally, the longitudinal guide rail is recessed on the inner wall of the adsorption column, that is, the inner wall of the adsorption column protrudes outward, and the longitudinal guide rail is arranged in the protruding space. The outer surface of the longitudinal guide rail faces the inside of the adsorption column, and two symmetrically arranged hard rubber sheets are provided on the surface to block a large number of resin particles from entering the longitudinal guide rail.

[0019] The sides of a pair of hard rubber sheets on the same longitudinal guide rail that are furthest from each other are fixed to the outer edge of the longitudinal guide rail, while the sides that are closest to each other are in contact with each other.

[0020] Further optionally, slider one and slider two are slidably connected on the longitudinal guide rail. Slider one is connected to the moving plate through a connecting rod, and slider two is connected to the moving plate through a telescopic rod. The connecting rod and the telescopic rod pass through the middle of a pair of corresponding hard rubber sheets, so that the moving plate moves along the longitudinal guide rail.

[0021] The movable plate is hinged to a connecting rod. By changing the length of the telescopic rod, the movable plate can be pulled, causing it to rotate upwards or downwards to open and close.

[0022] Further optionally, when the two moving plates of the same longitudinal guide rail group are in a horizontal state, they point towards each other but do not touch, so as to avoid affecting each other's movement; the moving plates are semi-circular and have an upward convex arc, and the surface of the moving plates is a mesh. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the resin adsorption device for defluorination of wastewater.

[0024] Figure 2 This is a partial top view of the resin adsorption device;

[0025] Figure 3 This is a schematic diagram of the traction device.

[0026] Figure 4 This is a side view of the resin adsorption device;

[0027] Figure 5 This is a schematic diagram of the movable plate in its retracted and upright state.

[0028] In the attached diagram, 1-adsorption column, 2-rotating guide rail, 3-stirring rod, 4-longitudinal guide rail, 5-moving plate, 6-traction device, 7-outer shell, 8-side one, 9-side two, 10-side three, 11-side four, 12-roller, 13-wedge shovel, 14-hard rubber sheet, 15-slider one, 16-connecting rod, 17-telescopic rod, 18-slider two. Detailed Implementation

[0029] This embodiment improves a resin adsorption device for wastewater defluorination, such as... Figures 1-5 As shown, it includes an adsorption column 1 and a transverse disturbance mechanism and a longitudinal disturbance mechanism inside the adsorption column 1, and the adsorption column is filled with defluorination resin.

[0030] The transverse disturbance mechanism includes several spiral rotating guide rails 2 arranged from top to bottom and a stirring rod 3. The rotating guide rails 2 are arranged horizontally, and the stirring rod 3 passes vertically through several rotating guide rails 2 and can move along the rotating guide rails 2, thereby loosening the resin bed in the adsorption column 1 laterally.

[0031] The longitudinal disturbance mechanism includes several sets of longitudinal guide rails 4. Each set of longitudinal guide rails 4 includes two vertically arranged longitudinal guide rails 4. The two longitudinal guide rails 4 have the same height and length. The two longitudinal guide rails 4 are symmetrically arranged on the inner wall of the adsorption column 1 with the center of the column as the center. Each longitudinal guide rail 4 is slidably connected to a movable plate 5 that can be opened, closed and rotated, which is used to loosen the resin bed in the adsorption column 1 up and down.

[0032] Optionally, the adsorption column 1 is a hollow cylinder filled with resin to form a resin bed.

[0033] Optionally, the several rotating guide rails 2 of the transverse disturbance mechanism are evenly arranged along the height direction of the resin bed, with a separate rotating guide rail 2 above the resin bed and a separate rotating guide rail 2 at the bottom of the resin bed.

[0034] The rotating guide rail 2 is arranged around the center of the adsorption column 1 at equal intervals for several turns until it reaches and is fixedly connected to the inner wall of the adsorption column 1, so that the rotating guide rail 2 is spiral.

[0035] The stirring rod 3 is slidably connected to the rotating guide rail 2 via the traction device 6. The stirring rod 3 always remains vertical, that is, at any time, the stirring rod 3 is connected to each of the rotating guide rails 2 on the same vertical line.

[0036] Alternatively, the stirring rod 3 may be curved in the horizontal direction, so that the stirring rod 3 can be adapted to the curved rotating guide rail 2 and the inner wall of the adsorption column 1.

[0037] Optionally, the traction device 6 is connected to the rotating guide rail 2 and has an arc along the rotating guide rail 2; the traction device 6 includes a housing 7 and an internal motor mechanism. The outer side of the housing 7 is provided with side 1 8, side 2 9, side 3 10 and side 4 11 in a clockwise direction. Side 1 8 is sleeved on the side of the rotating guide rail 2 facing the center of the adsorption column 1. A part of the roller 12 of the motor mechanism is located outside side 1 8. The roller 12 contacts the side of the rotating guide rail 2 and is used to drive the traction device 6 and the stirring rod 3 to move.

[0038] Side 3 10 is fixedly connected to the stirring rod 3, and side 2 9 and side 4 11 are each provided with at least one layer of wedge-shaped shovels 13, so that when the traction device 6 moves, it is easy to loosen the surrounding resin bed.

[0039] Optionally, the wedge-shaped shovel 13 is a rubber sheet with a certain hardness, which can loosen the resin layer in the forward direction of the traction device 6 while avoiding damage to the resin particles; the height of the wedge-shaped shovel 13 is not less than the height of the rotating guide rail 2, so that the wedge-shaped shovel 13 can clean and remove all the resin on the forward track of the traction device 6.

[0040] One side of the wedge shovel 13 is fixedly connected to side 2 9 or side 4 11, and the other side contacts the side of the rotating guide rail 2 facing the center of the adsorption column 1. The contact point formed is the tangent point. The tangent line on the surface of the rotating guide rail 2 corresponding to the tangent point forms an angle with the wedge shovel 13, and the angle is 45-60°.

[0041] The upper and lower surfaces of the wedge-shaped spatula 13 are sealed to prevent resin from entering between the wedge-shaped spatula 13 and the outer shell 7.

[0042] Optionally, when side 2 9 and / or side 4 11 are provided with multiple layers of wedge-shaped shovels 13, the included angle of the wedge-shaped shovels 13 closer to the traction device 6 is larger. The inner wedge-shaped shovels 13 do not have their own top and bottom surfaces, but share the upper and lower surfaces of the outermost wedge-shaped shovel 13. Multiple layers of wedge-shaped shovels 13 are beneficial for intercepting resin particles entering the outermost wedge-shaped shovel 13.

[0043] The lateral agitation mechanism described in this invention can loosen the resin bed laterally without stopping adsorption during wastewater adsorption treatment. Since the stirring rod 3 vertically penetrates the entire bed, it can loosen the bed throughout its height and width. In specific operation, before filling the resin, the adsorption column 1 is empty, and several rotating guide rails 2 are installed. The initial position of the stirring rod 3 is at the end of the rotating guide rail 2 connected to the inner wall of the adsorption column 1, meaning the stirring rod 3 is close to the inner wall of the adsorption column 1, which has virtually no impact on resin filling. Then, resin is filled, and the resin bed is vented and shaped. During this process, the rotating guide rails 2 have a concentric hollow structure, which does not affect the venting and shaping process. Next, wastewater is input from the top of the adsorption column 1, flowing from top to bottom through the resin bed. Fluoride ions in the water are adsorbed and removed by the resin, and product water is output from the bottom of the adsorption column 1. When the fluoride ion content in the permeate decreases slowly but is significantly far from the theoretical adsorption capacity, it indicates that various problems may occur inside the resin bed, such as pores, bubbles, caking, or collapse. In this case, the bed needs to be transported and reshaped.

[0044] Keeping the wastewater influent constant, control all traction devices 6 to move along the rotating guide rail 2 at the same speed and in the same direction. The stirring rod 3 rotates spirally from the outside to the inside within the adsorption column 1, thereby loosening the bed, promoting bubble discharge, and facilitating automatic bed reshaping. The speed of the traction devices 6 should not be too fast to avoid heavy bed compaction in some areas, which could damage the stirring rod 3. If the fluoride ion content in the bottom product water decreases slowly, the longitudinal disturbance mechanism described above should be used.

[0045] Optionally, a rotating guide rail 2 is provided between two adjacent sets of vertical guide rails 4; in all sets of vertical guide rails 4, the two symmetrically arranged vertical guide rails 4 on one side are all on the same vertical line, and the other side is on another vertical line; the angle between the line connecting the corresponding point on the cross-section of the adsorption column 1 and the center of the cross-section is 180 degrees, and the angle between the line connecting the corresponding point on the cross-section of the stirring rod 3 and the center of the cross-section is 90 degrees.

[0046] Optionally, the longitudinal guide rail 4 is disposed on the inner wall of the adsorption column 1.

[0047] Preferably, the longitudinal guide rail 4 is recessed on the inner wall of the adsorption column 1, that is, the inner wall of the adsorption column 1 protrudes outward, and the longitudinal guide rail 4 is arranged in the protruding space. The outer surface of the longitudinal guide rail 4 faces the inside of the adsorption column 1, and two symmetrically arranged hard rubber sheets 14 are provided on the surface to block a large number of resin particles from entering the longitudinal guide rail 4.

[0048] The sides of a pair of hard rubber sheets 14 on the same longitudinal guide rail 4 that are far from each other are fixed to the outer edge of the longitudinal guide rail 4, while the sides that are close to each other are in contact with each other.

[0049] Further optionally, slider 15 and slider 2 18 are slidably connected on the longitudinal guide rail 4. Slider 15 is connected to the moving plate 5 through connecting rod 16, and slider 2 18 is connected to the moving plate 5 through telescopic rod 17. Connecting rod 16 and telescopic rod 17 pass through the middle of a pair of corresponding hard rubber sheets 14, so that the moving plate 5 moves along the longitudinal guide rail 4.

[0050] The movable plate 5 is hinged to the connecting rod 16. By changing the length of the telescopic rod 17, the movable plate 5 can be pulled to rotate upward or downward to open and close.

[0051] Optionally, when the two moving plates 5 of the same longitudinal guide rail group 4 are both in a horizontal state, they point towards each other but do not touch, so as to avoid affecting each other's movement; the moving plate 5 is semi-circular and has an upward convex arc, and the surface of the moving plate 5 is a mesh surface.

[0052] In a specific implementation, after the stirring rod 3 loosens the resin bed, it returns to the inner wall of the adsorption column 1 without affecting the movement of the moving plate 5. In the set of longitudinal guide rails 4 above the rotating guide rail 2, the initial positions of the two sliders 15 are at the bottom of the longitudinal guide rail 4, and the corresponding sliders 18 are adapted to the position of the sliders 1. The initial state of the two moving plates 5 is vertical (at this time, the telescopic rod 17 is shortened), and the convex surface of the moving plate 5 is exactly adapted to the shape of the inner wall of the adsorption column 1. The two sliders 15 and the two sliders 18 drive the moving plate 5 to move upward at the same speed. The telescopic rod 17 extends and pushes the moving plate 5 to a horizontal state. Since the resin bed has been loosened by the stirring rod 3 in advance, and the upper surface of the moving plate 5 is convex at this time, the water flow resistance and resin resistance are small when the moving plate 5 moves upward. It can also use the weight of the resin above to promote the moving plate 5 to unfold into a horizontal state. As the two opposing movable plates 5 move upwards, they push up some of the hardened or accumulated resin, loosening it through gravity and water flow. The loosened resin falls in granular form through the mesh of the movable plates 5. The upward movement stops when the movable plates 5 reach below the next rotating guide rail 2, allowing for the telescopic rod 17 to shorten and the movable plates 5 to stand upright. Then, the movable plates 5 move downwards to their original position, awaiting the next loosening of the resin bed. This invention uses multiple vertical guide rail groups, which reduces the negative impact of the resin weight at the top of the bed on the upward movement of the movable plates at the bottom of the bed.

[0053] If the adsorption column is made of transparent acrylic material, the area of ​​the resin bed that needs to be shaped can be observed, and the corresponding moving plate can be moved individually for targeted shaping.

[0054] The fluoride-removing resin is selected from... CH-87 gel-type ion exchange resin, Haipu HP3500 resin.

Claims

1. A resin adsorption device for defluorination of wastewater, characterized in that, It includes an adsorption column and a transverse and longitudinal disturbance mechanism inside the adsorption column, and the adsorption column is filled with defluorination resin. The transverse disturbance mechanism includes several spiral rotating guide rails arranged from top to bottom and a stirring rod. The rotating guide rails are arranged horizontally, and the stirring rod passes vertically through several rotating guide rails and can move along the rotating guide rails, thereby loosening the resin bed in the adsorption column laterally. The longitudinal disturbance mechanism includes several longitudinal guide rail groups. Each longitudinal guide rail group includes two vertically arranged longitudinal guide rails with the same height and length. The two longitudinal guide rails are symmetrically arranged on the inner wall of the adsorption column with the center of the column as the center. Each longitudinal guide rail is slidably connected to a movable plate that can be opened, closed and rotated, which is used to loosen the resin bed in the adsorption column up and down. The stirring rod is slidably connected to the rotating guide rail via a traction device, and the stirring rod always remains vertical. The traction device is connected to the rotating guide rail and has an arc along the rotating guide rail; the traction device includes a housing and an internal motor mechanism. The outer side of the housing is provided with side one, side two, side three and side four in a clockwise direction. The side is fitted onto the side of the rotating guide rail facing the center of the adsorption column. A part of the roller of the motor mechanism is outside side one. The roller contacts the side of the rotating guide rail and is used to drive the traction device and the stirring rod to move. The stirring rod is fixedly connected to the third side, and both the first and second sides are provided with at least one layer of wedge-shaped shovels, which makes it easy to loosen the surrounding resin bed when the traction device moves. Sliding slider one and sliding slider two are slidably connected on the longitudinal guide rail. Sliding slider one is connected to the moving plate through a connecting rod, and sliding slider two is connected to the moving plate through a telescopic rod. The connecting rod and the telescopic rod pass through the middle of a pair of corresponding hard rubber sheets, so that the moving plate moves along the longitudinal guide rail. The movable plate is hinged to a connecting rod. By changing the length of the telescopic rod, the movable plate can be pulled, causing it to rotate upwards or downwards to open and close. When both moving plates of the same longitudinal guide rail assembly are in a horizontal state, they point towards each other but do not touch, so as to avoid affecting each other's movement; the moving plates are semi-circular and have an upward convex arc, and the surface of the moving plates is a mesh.

2. The resin adsorption device for wastewater defluorination according to claim 1, characterized in that, The adsorption column is a hollow cylinder filled with resin to form a resin bed.

3. The resin adsorption device for wastewater defluorination according to claim 2, characterized in that, The transverse disturbance mechanism has several rotating guide rails evenly arranged along the height direction of the resin bed, with a separate rotating guide rail above the resin bed and a separate rotating guide rail at the bottom of the resin bed. The rotating guide rail is arranged around the center of the adsorption column at equal intervals for several turns until it reaches and is fixedly connected to the inner wall of the adsorption column, making the rotating guide rail spiral.

4. The resin adsorption device for wastewater defluorination according to claim 3, characterized in that, The stirring rod has an arc in the horizontal direction, which allows it to be adapted to the arc-shaped rotating guide rail and the inner wall of the adsorption column.

5. The resin adsorption device for wastewater defluorination according to claim 3, characterized in that, The wedge-shaped shovel is a rubber sheet with a certain hardness, which can loosen the resin layer in the forward direction of the traction device while avoiding damage to the resin particles; the height of the wedge-shaped shovel is not less than the height of the rotating guide rail, so that the wedge-shaped shovel can clean and remove all the resin on the forward track of the traction device. One side of the wedge-shaped shovel is fixedly connected to side two or side four, and the other side contacts the side of the rotating guide rail facing the center of the adsorption column. The contact point formed is the tangent point, and the tangent on the rotating guide rail surface corresponding to the tangent point forms an angle with the wedge-shaped shovel. The upper and lower surfaces of the wedge-shaped spade are sealed to prevent resin from entering between the wedge-shaped spade and the outer shell.

6. The resin adsorption device for wastewater defluorination according to claim 2, characterized in that, A rotating guide rail is set between two adjacent vertical guide rail groups; in all the two symmetrically arranged vertical guide rails of the vertical guide rail groups, one side of the vertical guide rails are set on the same vertical line, and the other side of the vertical guide rails are set on another vertical line. The angle between the line connecting the point corresponding to the cross-section of the adsorption column and the center of the cross-section is 180 degrees, and the angle between the line connecting the point corresponding to the stirring rod on the cross-section and the center of the cross-section is 90 degrees.

7. The resin adsorption device for wastewater defluorination according to claim 6, characterized in that, The longitudinal guide rail is recessed on the inner wall of the adsorption column, and the inner wall of the adsorption column protrudes outward. The longitudinal guide rail is installed in the protruding space. The outer surface of the longitudinal guide rail faces the inside of the adsorption column. Two symmetrically arranged hard rubber sheets are provided on this surface to prevent a large number of resin particles from entering the longitudinal guide rail. The sides of a pair of hard rubber sheets on the same longitudinal guide rail that are furthest from each other are fixed to the outer edge of the longitudinal guide rail, while the sides that are closest to each other are in contact with each other.

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