An environmentally friendly polymer resin defluorination equipment

Abstract

The present invention relates to the technical field of fluorine-containing wastewater treatment, and specifically to an environmentally friendly polymer resin defluorination device, comprising a sedimentation tank, a clean water tank, a buffer tank, an adsorption tank and a resin module, wherein the sedimentation tank comprises a muddy water tank and a clear water tank, the number of the sedimentation tanks is greater than one, the buffer tank is located below the sedimentation tank, the adsorption tank is located below the buffer tank, the clean water tanks inside the multiple sedimentation tanks are all connected to the buffer tank, the buffer tank is connected to the adsorption tank, the resin module comprises a grease box and a defluorination resin, the grease box is rotatably connected to the side wall of the adsorption tank, and the grease boxes at the same horizontal height are a group, the directions of each group of grease boxes are parallel, and the defluorination resin is filled inside the grease box. The present invention uses multiple sedimentation tanks in combination with the buffer tank and the adsorption tank, and designs the opening and closing of the filling layer in the adsorption tank, thereby achieving continuous operation of the adsorption tank and thorough regeneration of the filling layer in the adsorption tank, so as to improve the defluorination efficiency of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of fluorine-containing wastewater treatment, in particular to an environmentally friendly polymer resin defluorination device. Background Art

[0002] The renewable energy industry is a crucial component in achieving green development goals. Its primary forms include photovoltaics, wind power, hydropower, nuclear power, and biomass power generation. Photovoltaic power generation, by comparison, holds greater potential for development. Photovoltaic power generation utilizes solar energy to convert photons into electrons through a purely physical process. This conversion process does not emit any harmful substances. However, the manufacturing of photovoltaic panels does produce significant amounts of fluoride-containing wastewater (fluoride content can be as high as 1000 mg / L).

[0003] The traditional method of treating fluoride-containing wastewater is to use a sedimentation tank, add lime to the wastewater to obtain calcium fluoride precipitate through chemical reaction. In order to enhance the fluoride removal effect, aluminum salts, iron salts and other substances are also added as flocculants to accelerate the above reaction. However, this chemical reaction is an incomplete reaction. Therefore, as the fluoride content of the wastewater decreases, its speed will also decrease or even stop. In addition, during the reaction process, the produced calcium fluoride will adhere to the surface of the lime particles, which will further reduce the reaction efficiency, making it difficult to efficiently obtain clean water with extremely low fluoride content (the fluoride content of wastewater treated by sedimentation is generally 20-30 mg / L). With the tightening of emission indicators (the current most stringent indicator is below 1 mg / l), it is obvious that sedimentation tanks alone cannot meet the requirements. In order to meet the needs of the industry, the existing technology usually adopts a multi-stage defluorination design, and uses precipitation as a pretreatment process for wastewater defluoridation, removing a large amount of fluoride ions in the wastewater by precipitation, and then passing the low-fluoride wastewater into the subsequent defluoridation step (such as ion exchange method, electric flocculation method, etc.) to obtain clean water with extremely low fluoride content. For example, in an energy-saving and environmentally friendly wastewater defluoridation equipment with publication number CN114477515B, the wastewater is first precipitated inside the supporting inner shell to complete the first defluoridation, and then the defluoridated wastewater enters the first discharge pipe and is separated from impurities under the spiral action of the auger to complete the second defluoridation, and then the wastewater enters the purification box and completes the third defluoridation under the adsorption action of the reverse osmosis membrane, thereby obtaining clean water with extremely low fluoride content.

[0004] The existing technology can further purify the clean water obtained by the precipitation method through the design of a multi-stage defluorination structure to obtain wastewater with extremely low fluoride content. However, its defluorination efficiency has room for further improvement for the following reasons: 1) The multi-stage structure of the existing defluorination equipment is often linear in working mode, that is, the wastewater can enter the subsequent adsorption structure for further defluorination after being discharged from the sedimentation tank, but the time consumed by the precipitation process is usually several times that of the adsorption process. This causes the adsorption structure to have a long window period during the working process, resulting in low defluorination efficiency; 2) Various filling materials such as resin, activated carbon and reverse osmosis membrane can be set inside the adsorption structure. The filling materials will fatigue while adsorbing fluoride ions. In order to regenerate them, ultrasonic waves combined with water washing are often used. However, in order to ensure the defluorination effect, the filling layer usually has a certain thickness, which also makes it difficult for the filler inside the filling layer to be completely regenerated, thereby causing blockage and affecting the efficiency of adsorption defluorination.

[0005] To this end, based on our company's "Research and Development of Production Wastewater Treatment Technology in the Photovoltaic Industry" project, we proposed an environmentally friendly polymer resin defluorination equipment. Summary of the Invention

[0006] The purpose of the present invention is to provide an environmentally friendly polymer resin defluorination equipment, which solves the problems of long window period of the adsorption device and difficulty in regenerating the internal filling of the adsorption device in multi-stage defluorination equipment. By using multiple sedimentation tanks in combination with buffer and adsorption tanks, and designing the opening and closing of the filling layer in the adsorption tank, the adsorption tank can continuously work and the filling layer in the adsorption tank can be thoroughly regenerated, so as to improve the defluorination efficiency of the equipment.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An environmentally friendly polymer resin defluorination device includes a sedimentation tank and a water purification tank, wherein the sedimentation tank includes a muddy water tank and a clear water tank, and further includes a buffer tank, an adsorption tank, a resin module, and an ultrasonic transducer. The number of the sedimentation tanks is greater than one, the buffer tank is located below the sedimentation tank, the adsorption tank is located below the buffer tank, the clear water tanks inside the plurality of sedimentation tanks are all connected to the buffer tank, and the buffer tank is connected to the adsorption tank. The resin module includes a grease box and a defluorination resin, the grease box is rotatably connected to the side wall of the adsorption tank, and the grease boxes at the same level are grouped together, the directions of each group of grease boxes are parallel, and the defluorination resin is filled inside the grease box.

[0009] The sedimentation tank performs pre-fluorination and discharges wastewater with fluoride content that meets the standard into the buffer tank. The grease boxes all maintain a horizontal rotation direction and defluorinate the wastewater falling from the buffer tank again, and the grease boxes maintain a non-horizontal rotation direction and receive the ultrasonic waves released by the ultrasonic transducer.

[0010] The reason why there is a window period in the adsorption process in existing multi-stage fluorine removal equipment is the lack of a buffer device. The sedimentation tank directly discharges the defluorinated wastewater into the adsorption device. Subsequently, the adsorption process starts with the start of the discharge process and ends with the end of the discharge process. After the wastewater in the sedimentation tank is completely discharged, wastewater is reintroduced, and the sedimentation process then continues for a certain period of time. During the sedimentation process, the adsorption device does not effectively operate, resulting in a waste of equipment performance. Therefore, a buffer device is indispensable for large-scale treatment of fluorine-containing wastewater. From a theoretical analysis, the larger the volume of the buffer device, the shorter the window period of the adsorption device and the higher the fluorine removal efficiency of the equipment. However, based on actual production, the installation space of the equipment, as well as the manufacturability and production cost of large-volume equipment must be considered.

[0011] Preferably, a first solenoid valve is provided on the pipeline between each sedimentation tank and the buffer tank, the first solenoid valve is an on-off valve, and the first solenoid valve is installed on one side of the sedimentation tank;

[0012] In the above scheme, multiple sedimentation tanks are used in conjunction with a buffer tank, and each sedimentation tank discharges fluorine-containing wastewater in turn, so that the buffer tank can continuously drain water to the adsorption tank, thereby avoiding the occurrence of a window period in the adsorption tank, so as to improve the fluorine removal efficiency of the equipment. Such a design avoids the large size of the sedimentation tank and the buffer tank, making the layout and installation of the equipment more flexible and convenient; a first solenoid valve (on-off valve) is set between each sedimentation tank and the buffer tank to independently control the discharge time of each sedimentation tank, so that the fluorine-containing wastewater in different sedimentation tanks is discharged into the buffer tank in sequence; the first solenoid valve is installed on one side of the sedimentation tank to prevent wastewater with a high fluorine content from entering the pipeline between the sedimentation tank and the buffer tank from the clear water tank during the sedimentation process, thereby causing pollution to the pipeline, thereby increasing the fluorine content of the wastewater when it is discharged again.

[0013] There are many options for filling materials in the adsorption tank. This solution uses a fluoride-selective adsorption resin with excellent regeneration effect. The so-called regeneration is to clean the fluoride ions adsorbed on the surface of the resin through relevant technologies, so that the resin can restore its excellent adsorption capacity. The most common method is water washing with ultrasound. The principle is that the propagation of ultrasound in water causes high-frequency vibration of water molecules, which in turn forms small bubbles and quickly bursts. The resin is cleaned by the impact of the bubble shattering. However, the existing technology often introduces pure water or tap water into the equipment during the regeneration process, resulting in additional water waste and is not conducive to the original intention of green development of fluoride removal equipment.

[0014] Preferably, the adsorption tank is connected to the water purification tank, and a water pump and a second solenoid valve are installed on the pipeline connecting the adsorption tank and the water purification tank. The water pump is a two-way pump, and the second solenoid valve is a three-position three-way valve.

[0015] In the above scheme, the water washing step in the regeneration process is realized through the cooperation of the water pump and the second solenoid valve; the advantage of this is that it avoids the introduction of pure water to meet the original intention of green development, and uses the particles in the defluoridated water (photovoltaic wastewater often also includes nitrogen compounds) to strengthen the impact when the bubbles break, so as to enhance the regeneration effect of the defluoridation resin, thereby ensuring the stable adsorption capacity of the defluoridation resin and ensuring the defluoridation efficiency of the defluoridation equipment.

[0016] In the prior art, resin is accumulated at the bottom of the adsorption tank. To ensure the adsorption and defluorination effect, the accumulated resin often has a certain thickness. As a result, under the action of ultrasound, bubbles can only be broken on the upper surface of the resin pile and cannot penetrate deep into the resin pile. As a result, the regeneration effect of the internal resin is not obvious, which affects the adsorption effect of the resin pile and causes the defluorination efficiency of the adsorption tank to gradually decrease.

[0017] Preferably, the resin module further comprises a gear, a chain and a motor, a main shaft is provided at both the front and rear ends of the grease box, the main shaft is rotatably connected to the side wall of the adsorption tank, the gear is mounted on the protruding end of the main shaft, a plurality of the chains are respectively wound around two adjacent gears, and the motor is connected to the main shaft at the far right end;

[0018] In the above scheme, a group of grease boxes maintain the same rotation direction through the engagement of the chain and the gear. Then, during adsorption and defluorination, the grease boxes all maintain a horizontal rotation direction to cooperate with the inner wall of the adsorption tank to complete the sealing of the plane where the grease boxes are located, thereby ensuring the defluorination effect. During the regeneration of the defluorination resin, the grease boxes all maintain a non-horizontal rotation direction, so that the defluorination resin in each grease box can fully withstand the impact of bubble collapse, thereby completely regenerating the defluorination resin, ensuring the defluorination resin's adsorption capacity for fluoride ions, and thus improving the defluorination efficiency of the equipment.

[0019] Preferably, the main axes are staggered in the vertical direction, the ultrasonic transducer is installed on the inner bottom of the adsorption tank, and the vibration direction of the ultrasonic transducer is in the vertical direction;

[0020] In the above scheme, the main axes are staggered in the up and down directions, which not only prevents the fluorine ions removed from the upper fat box from falling into the lower fat box to ensure the regeneration effect of each fat box, but also prevents the lower fat box from blocking the ultrasonic waves transmitted to the upper fat box, so that each fat box can be subjected to the bubble-breaking impact of equal intensity, thereby ensuring the removal effect of fluorine ions in each fat box. The vibration direction of the ultrasonic transducer is set to the up and down direction because ultrasonic waves can only propagate in the form of longitudinal waves in the liquid, that is, the propagation direction is the same as the vibration direction.

[0021] Preferably, the grease box has two non-horizontal rotation directions: one grease box is kept vertical, and the other grease box has an angle of 10° to 45° with the vertical direction;

[0022] In the above scheme, the grease box is in a vertical state in order to reduce the resistance of the water pump to the water when pumping water into the adsorption tank, thereby reducing the power consumption of the water pump; the grease box is set at an angle of 10° to 45° to the vertical direction in order to increase the contact area between the grease box and the impact caused by the ultrasonic wave, thereby enhancing the cleaning effect of the fluorine-removing resin inside the grease box. When the angle is less than 10°, the enhancement effect is not obvious. When the angle is greater than 45°, the lower grease box will block the ultrasonic wave propagating to the upper grease box, thereby reducing the regeneration effect of the upper grease box.

[0023] In the prior art, the resin particles accumulated at the bottom of the adsorption tank are of uniform size. Therefore, the resin in the upper area often enters a fatigue state first, reducing its adsorption capacity for fluoride ions. Once this phenomenon occurs, a regeneration step is required to ensure the defluorination effect of the adsorption tank. Therefore, the regeneration step in the prior art is frequent, which is obviously not conducive to improving the defluorination efficiency.

[0024] Preferably, the particle sizes of the fluorine-removing resin in the grease boxes of different groups are different, and the particle diameters of the fluorine-removing resin gradually decrease from top to bottom of the grease boxes;

[0025] Through the above scheme, the fluorine-containing wastewater discharged from the buffer tank into the adsorption tank first passes through the large-particle fluorine removal resin, and then passes through the fluorine removal resin with gradually decreasing particle radius step by step; since the larger the radius of the fluorine removal resin particles, the larger the gap between the particles, and accordingly, the fluorine removal resin is less likely to be blocked, and thus less likely to enter a fatigue state, thereby reducing the frequency of fluorine removal resin regeneration and improving the fluorine removal efficiency of the equipment.

[0026] Preferably, the grease box includes a box body and a box cover, the box body is connected to the main shaft, the box cover is detachably connected to the box body, and the box cover is waist-round in shape after being connected to the box body when viewed from the front, and elastic material is arranged on the outside of the box cover and the arc-shaped structure of the box body;

[0027] In the above scheme, the fluorine removal resin inside the box body can be replaced regularly through the detachable connection of the box cover on the box body; the setting of the elastic material ensures that when the grease boxes are in a horizontal state, the grease boxes are pressed against each other to ensure sealing, thereby ensuring the defluorination effect.

[0028] Preferably, a third solenoid valve is installed on the pipeline between the buffer tank and the adsorption tank, and the third solenoid valve is a flow control valve;

[0029] In the above scheme, the third solenoid valve is set to control the amount of water discharged from the buffer tank to the adsorption tank, so that the fluorine-containing wastewater in the sedimentation tank can be quickly discharged into the buffer tank, so that the sedimentation tank can quickly enter the next sedimentation process, thereby improving the sedimentation and fluorine removal efficiency. In addition, the control of the water discharge by the third solenoid valve can also reduce the impact of the fluorine-containing wastewater on the grease box, thereby ensuring the sealing of the grease box connection and thus ensuring the fluorine removal effect.

[0030] Preferably, a U-shaped pipe is provided on the pipe between the adsorption tank and the clean water tank, and a fluoride ion selective electrode is installed inside the U-shaped pipe and the clean water tank;

[0031] In the above scheme, the precipitation and adsorption fluoride removal effects of the equipment are monitored in real time by arranging two fluoride ion selective electrodes.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention avoids the window period of the adsorption tank through the coordination of several sedimentation tanks and buffer tanks, thereby improving the defluorination efficiency of the equipment. In addition, through the separation and combination design of the grease boxes loaded with defluorination resin inside the adsorption tank, the grease boxes are pressed against each other to seal during adsorption defluorination, thereby ensuring the defluorination effect. In addition, when the defluorination resin is regenerated, the grease boxes are separated so that the defluorination resin inside each grease box is fully cleaned, thereby improving the regeneration effect of the defluorination resin and further improving the defluorination efficiency of the equipment.

[0034] 2. The present invention installs the grease boxes on the adsorption tank in an offset manner along the upper and lower directions, thereby avoiding the phenomenon that the fluorine ions removed from the upper grease box fall into the lower grease box during the regeneration of the defluorination resin, thereby ensuring the regeneration effect, and avoiding the lower grease box blocking the ultrasonic wave transmitted to the upper grease box, thereby further improving the regeneration effect of the defluorination resin in each grease box. During regeneration, the grease boxes deviate from the vertical direction, and with the help of the offset arrangement, the contact area between the grease boxes and the ultrasonic wave is increased, thereby further improving the regeneration effect.

[0035] 3. In the present invention, the box cover is detachably arranged on the box body, so that the fluorine-removing resin in the box body can be replaced regularly, and the shape of the assembled box cover and box body is set to be waist-round, so that when pumping water from the adsorption tank or supplying water to the adsorption tank during the regeneration process, the arc structure at both ends of the fat box can reduce the resistance to water, so as to reduce the power consumption of the water pump, thereby conforming to the original intention of the green development of the defluorination equipment. At the same time, the arc structure at both ends of the fat box is covered with elastic material so that the two adjacent fat boxes can be more closely abutted, thereby ensuring the defluorination effect of the fluorine-removing resin. In addition, the particle diameter of the fluorine-removing resin gradually decreases in the order of the fat boxes from top to bottom, so that the fluorine-removing resin in the upper fat box is not easy to fatigue, thereby reducing the frequency of regeneration, so that the equipment's adsorption and defluorination process can last for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall isometric structure of the present invention;

[0037] Figure 2 It is a schematic diagram of the cross-sectional structure of the adsorption cell of the present invention;

[0038] Figure 3 It is a schematic diagram of the overall left side structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the adsorption state of the resin module of the present invention;

[0040] Figure 5 This is a schematic diagram of the resin module state when the water pump of the present invention is pumping water;

[0041] Figure 6 This is a schematic diagram of the resin module state during the regeneration process of the present invention;

[0042] Figure 7 For the present invention Figure 2 A magnified schematic diagram of part A;

[0043] Figure 8 It is a schematic diagram of the fat box structure of the present invention.

[0044] In the figure: 1. Sedimentation tank; 11. Muddy water tank; 12. Clear water tank; 2. Buffer tank; 3. Adsorption tank; 4. Resin module; 41. Grease box; 411. Main shaft; 412. Box body; 413. Box cover; 42. Fluorine removal resin; 43. Gear; 44. Chain; 45. Motor; 5. Ultrasonic transducer; 6. Clean water tank; 7. U-shaped pipe; 8. Fluoride ion selective electrode; 9. Second solenoid valve; 10. Water pump; 13. Third solenoid valve; 14. First solenoid valve. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] See also Figures 1 to 8 The present invention provides an environmentally friendly polymer resin defluorination equipment, the technical solution is as follows:

[0047] An environmentally friendly polymer resin defluorination equipment includes a sedimentation tank 1 and a clean water tank 6. The sedimentation tank 1 includes a muddy water tank 11 and a clear water tank 12. The wastewater must be initially filtered before entering the sedimentation tank 1 to remove various impurities. The sedimentation tank 1 adopts the traditional calcium salt precipitation method, that is, the lime precipitation method, by adding calcium salt to the wastewater to make calcium ions react with fluoride ions to form precipitates, so as to achieve the purpose of removing fluoride ions in the wastewater, and an appropriate amount of polyaluminum is added to the sedimentation tank 1 as a coagulant to accelerate the aggregation of precipitates, thereby improving the defluorination efficiency of the precipitation process. The muddy water tank 11 has a cavity composed of partitions, and different reagents are added to each cavity, and a stirring device is installed inside the cavity to accelerate the mixing of the reagents. The fully mixed wastewater is placed under the clear water tank 12. The clear water tank 12 and the muddy water tank 11 are separated by an outlet weir. The outlet weir is The dry inclined plate is constructed to stabilize the wastewater entering the clear water tank 12 from the muddy water tank 11, thereby avoiding disturbance of the sedimentation. It also includes a buffer tank 2, an adsorption tank 3, a resin module 4 and an ultrasonic transducer 5. The number of sedimentation tanks 1 is greater than one. In this method, the number of sedimentation tanks 1 is set to two for the convenience of display. In actual production, a corresponding number of sedimentation tanks 1 can be set according to production needs. The buffer tank 2 is located below the sedimentation tank 1, and the adsorption tank 3 is located below the buffer tank 2. The clear water tanks 12 inside the two sedimentation tanks 1 are connected to the buffer tank 2, and the buffer tank 2 is connected to the adsorption tank 3. The resin module 4 includes a grease box 41 and a fluorine-removing resin 42. The grease box 41 is rotatably connected to the side wall of the adsorption tank 3, and the grease boxes 41 at the same horizontal height are a group. The directions of each group of grease boxes 41 are parallel, and the fluorine-removing resin 42 is filled in the interior of the grease box 41.

[0048] The sedimentation tank 1 performs pre-fluorination and discharges the wastewater with fluoride content that meets the standard into the buffer tank 2. The grease box 41 maintains a horizontal rotation direction and defluorinates the wastewater falling from the buffer tank 2 again, and the grease box 41 maintains a non-horizontal rotation direction and receives the ultrasonic waves released by the ultrasonic transducer 5.

[0049] As an embodiment of the present invention, refer to Figure 1A first solenoid valve 14 is provided on the pipeline between each sedimentation tank 1 and the buffer tank 2. The first solenoid valve 14 is an on-off valve and is installed on one side of the sedimentation tank 1. A U-shaped pipe 7 is provided on the pipeline between the adsorption tank 3 and the clean water tank 6. A fluoride ion selective electrode 8 is installed inside the U-shaped pipe 7 and the clear water tank 12. When the fluoride ion selective electrode 8 in the clear water tank 12 detects that the fluoride content meets the standard, the first solenoid valve 14 opens to discharge the fluoride-containing wastewater. When treating the same batch of fluoride-containing wastewater, the sedimentation time of the sedimentation tank 1 is basically equal, so that the drainage time to each sedimentation tank 1 can be staggered, and the time for the completion of precipitation is also staggered, so as to avoid the wastewater in the sedimentation tank 1 from staying in the sedimentation tank 1 for a long time after the sedimentation is completed, thereby ensuring the fluoride removal efficiency of the equipment. When the fluoride ion selective electrode 8 in the U-shaped pipe 7 detects that the fluoride content does not meet the standard, the fluoride removal resin 42 needs to be regenerated. The U-shaped pipe 7 does not need to be set too deep to prevent the water discharged from the adsorption tank 3 from remaining in the U-shaped pipe 7, resulting in inaccurate monitoring structure of the fluoride ion selective electrode 8.

[0050] As an embodiment of the present invention, refer to Figure 1 and Figure 3 , the adsorption tank 3 is connected to the clean water tank 6, and a water pump 10 and a second solenoid valve 9 are installed on the pipeline connecting the adsorption tank 3 and the clean water tank 6. The water pump 10 is a two-way pump, such as a gear pump 43, and the second solenoid valve 9 is a three-position three-way valve; a third solenoid valve 13 is installed on the pipeline between the buffer tank 2 and the adsorption tank 3, and the third solenoid valve 13 is a flow control valve;

[0051] During regeneration, first, the second solenoid valve 9 connects the adsorption tank 3 with the clean water tank 6, and the water pump 10 supplies water to the inside of the adsorption tank 3. After the water is supplied to the adsorption tank 3, the channel of the second solenoid valve 9 is closed, and then the ultrasonic transducer 5 starts to work; after the ultrasonic cleaning is completed, the second solenoid valve 9 connects the adsorption tank 3 with the buffer tank 2, and the water pump 10 discharges the regenerated wastewater inside the adsorption tank 3 to the buffer tank 2, and then the regenerated wastewater is defluorinated again after passing through the adsorption tank 3 and discharged to the clean water tank 6; during the above regeneration process, the channel of the third solenoid valve 13 is closed to prevent the fluorine-containing wastewater that has not been adsorbed by the defluorination resin 42 from being directly discharged into the clean water tank 6.

[0052] As an embodiment of the present invention, refer to Figure 2 The resin module 4 also includes a gear 43, a chain 44 and a motor 45. The front and rear ends of the grease box 41 are provided with a main shaft 411, which is rotatably connected to the side wall of the adsorption tank 3. The gear 43 is installed on the protruding end of the main shaft 411. Several chains 44 are respectively wound around two adjacent gears 43. The motor 45 is connected to the main shaft 411 at the right end; each group of grease boxes 41 is driven by a motor 45 (such as Figure 2As shown), each group of grease boxes 41 can also be further connected by a chain 44 to use a motor 45 to drive all grease boxes 41. The motor 45 should have a self-locking function when it stops to maintain the various rotation directions of the grease boxes 41; to facilitate the installation and subsequent maintenance of the resin module 4 in the adsorption tank 3, the adsorption tank 3 is assembled in a composite form that includes both welding and threaded connection. First, the main shafts 411 at the front and rear ends of the grease box 41 are respectively inserted into the front plate and the rear plate of the adsorption tank 3, and sealed bearings are installed between the main shaft 411 and the front and rear plates to prevent the adsorption tank 3 from leaking water outward. Then, the lower plate and the right plate are welded between the front plate and the rear plate to fix the prototype of the adsorption tank 3, and then each gear 43 is assembled on the main shaft 411, and the gear 43 is meshed with the chain 44. Finally, the installation of the motor 45 is completed, and the left plate and the upper plate are assembled in a threaded connection to facilitate the later maintenance work of the resin module 4. When connecting, a sealing ring is used for sealing.

[0053] As an embodiment of the present invention, refer to Figures 4 to 6 , the main shafts 411 are staggered in the vertical direction, the ultrasonic transducer 5 is installed at the bottom of the adsorption tank 3, and the vibration direction of the ultrasonic transducer 5 is in the vertical direction; the grease box 41 has two non-horizontal rotation directions: one grease box 41 remains vertical, and the angle between the second grease box 41 and the vertical direction is 10°~45°; the main shafts 411 are staggered in the vertical direction, which is achieved by the staggered arrangement of the main shaft 411 mounting holes on the front and rear plates of the adsorption tank 3; when the defluorination resin 42 is used for adsorption and defluorination, all the grease boxes 41 maintain a horizontal rotation direction under the action of the motor 45 (such as Figure 4 42 defluorination resin regeneration process, to the adsorption tank 3 and water pumping from the adsorption tank 3, all fat box 41 are maintained in the vertical rotation direction (such as Figure 5 When the ultrasonic transducer 5 is working, all the fat boxes 41 deviate slightly from the vertical direction (as shown); Figure 6 shown).

[0054] As an embodiment of the present invention, refer to Figure 7 The particle sizes of the fluorine-removing resin 42 in different groups of grease boxes 41 are different, and the particle diameters of the fluorine-removing resin 42 gradually decrease from top to bottom of the grease boxes 41 .

[0055] As an embodiment of the present invention, refer to Figure 8The grease box 41 includes a box body 412 and a box cover 413. The box body 412 is connected to the main shaft 411, and the box cover 413 is detachably connected to the box body 412. When viewed from the front, the box cover 413 is waist-round after being connected to the box body 412, and elastic materials are arranged on the outside of the box cover 413 and the arc structure of the box body 412. When the fluorine-removing resin 42 inside the grease box 41 reaches its service life, it needs to be replaced to ensure efficient fluorine removal of the equipment. When replacing the fluorine-removing resin 42, first remove the upper plate and left plate of the adsorption tank 3. , and then rotate the motor 45 to make the box cover 413 located above the grease box 41 or to the left, then use a tool (such as an electric screwdriver) to remove the box cover 413, and then rotate the motor 45 to make the box body 412 opening face downward to pour out the fluorine-removing resin 42 inside, and then rotate the motor 45 to make the box body 412 opening face upward, place the new fluorine-removing resin 42 into the box body 412, and reassemble the box cover 413, finally completely remove the fluorine-removing resin 42 inside the adsorption pool 3, and merge the adsorption pool 3.

[0056] Working Principle: In order to improve the defluorination efficiency of the defluorination equipment, the present invention improves two structures of the original equipment. First, a buffer tank 2 is added between the sedimentation tank 1 and the adsorption tank 3, and multiple sedimentation tanks 1 are connected to the buffer tank 2, so that the buffer tank 2 can continuously discharge fluorine-containing wastewater to the adsorption tank 3 to avoid the window period of the adsorption tank 3; second, the defluorination resin 42 originally accumulated inside the adsorption tank 3 is independently packaged using grease boxes 41, and multiple grease boxes 41 at the same height are grouped together. When the grease boxes 41 of a group are all horizontal, the adsorption effect can be achieved. When the grease boxes 41 of a group are all non-horizontal, the defluorination resin 42 inside each grease box 41 can be fully cleaned and completely regenerated;

[0057] Specifically, in order to discharge the fluorine-containing wastewater in the two sedimentation tanks 1 into the buffer tank 2 in sequence, thereby reducing the volume of the buffer tank 2 and the sedimentation tank 1, and thus making the installation of the equipment more convenient and the production cost lower, a first solenoid valve 14 is provided on the pipeline between each sedimentation tank 1 and the buffer tank 2, so as to independently control the discharge time of each sedimentation tank 1, so that the fluorine-containing wastewater in different sedimentation tanks 1 is discharged into the buffer tank 2 in sequence, and the first solenoid valve 14 is installed on one side of the sedimentation tank 1, thereby preventing the fluorine-containing wastewater from contaminating the pipeline, so as to ensure that the fluorine content of the wastewater is stable when it is discharged again;

[0058] In order to avoid the waste of pure water during the regeneration process of the defluorination resin 42 and to make the equipment more in line with the original intention of green development, the water inside the clean water tank 6 is recycled by means of the linkage of the water pump 10 and the second solenoid valve 9; when the defluorination resin 42 is regenerated, the second solenoid valve 9 first connects the adsorption tank 3 with the clean water tank 6, and then the water pump 10 pumps water into the adsorption tank 3. After the pumping is completed, the channel of the second solenoid valve 9 is closed, and the ultrasonic transducer 5 is started to remove the fluoride ions on the surface of the defluorination resin 42 by means of the cavitation effect. After the removal is completed, the second solenoid valve 9 connects the adsorption tank 3 with the buffer tank 2, and the water pump 10 discharges the regenerated wastewater inside the adsorption tank 3 to the buffer tank 2, and then the regenerated wastewater is defluorinated again after passing through the adsorption tank 3 and discharged to the clean water tank 6;

[0059] In order to ensure that the fluorine-removing resin 42 in each grease box 41 can fully contact the ultrasonic wave during the regeneration process, thereby enhancing the regeneration effect of the fluorine-removing resin 42 and improving the fluorine removal efficiency of the regenerated fluorine-removing resin 42, the main axes 411 of the grease boxes 41 are staggered in the vertical direction to avoid the lower grease box 41 from blocking the ultrasonic wave. This allows each grease box 41 to be subjected to the bubble-breaking impact of equal intensity. The staggered arrangement can also prevent the fluorine ions removed in the upper grease box 41 from falling into the lower grease box 41.

[0060] In order to increase the contact area between each grease box 41 and the ultrasonic wave, and further enhance the regeneration effect of the fluorine-removing resin 42, when the fluorine-removing resin 42 is regenerated, the grease box 41 is at an angle of 10° to 45° with the vertical direction. This ensures sufficient contact area while preventing the lower grease box 41 from blocking the ultrasonic wave propagating to the upper grease box 41, so that the regeneration effect of the fluorine-removing resin 42 inside each grease box 41 is consistent.

[0061] In order to reduce the frequency of regeneration of the fluorine removal resin 42, thereby allowing adsorption defluorination to continue and improving the defluorination efficiency of the equipment, the particle sizes of the fluorine removal resin 42 in each group of grease boxes 41 are different, and the particle diameters of the fluorine removal resin 42 gradually decrease from top to bottom of the grease boxes 41. This makes it difficult for the fluorine removal resin 42 in the upper grease box 41 to be clogged and thus difficult to enter a fatigue state, thereby reducing the frequency of regeneration of the fluorine removal resin 42.

[0062] In order to speed up the efficiency of fluorine removal by precipitation and accelerate the speed of discharging fluorine-containing wastewater from the sedimentation tank 1, so that the sedimentation tank 1 can quickly enter the next round of precipitation, a third solenoid valve 13 is installed on the pipeline between the buffer tank 2 and the adsorption tank 3, so that the discharge speed from the sedimentation tank 1 to the buffer tank 2 and the discharge speed from the buffer tank 2 to the adsorption tank 3 are independent of each other, thereby allowing the fluorine-containing wastewater in the sedimentation tank 1 to be quickly discharged into the buffer tank 2, and reducing the flow rate from the buffer tank 2 to the adsorption tank 3, thereby reducing the impact of the fluorine-containing wastewater on the grease box 41, thereby ensuring the sealing of the connection of the grease box 41, and ensuring the effect of fluorine removal by adsorption in the adsorption tank 3;

[0063] In order to monitor the effects of precipitation and adsorption defluoridation, fluoride ion selective electrodes 8 are installed inside the U-shaped pipe 7 and the clear water tank 12. When the fluoride ion selective electrode 8 in the clear water tank 12 detects that the fluoride content meets the standard, the first solenoid valve 14 opens to discharge the fluoride-containing wastewater; when the fluoride ion selective electrode 8 in the U-shaped pipe 7 detects that the fluoride content does not meet the standard, the fluoride removal resin 42 needs to be regenerated.

[0064] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly polymer resin defluorination device, comprising a sedimentation tank (1) and a clean water tank (6), wherein the sedimentation tank (1) comprises a muddy water tank (11) and a clear water tank (12), characterized in that: It also includes a buffer tank (2), an adsorption tank (3), a resin module (4) and an ultrasonic transducer (5), the number of the sedimentation tanks (1) is greater than one, the buffer tank (2) is located below the sedimentation tank (1), the adsorption tank (3) is located below the buffer tank (2), the clear water tanks (12) inside the plurality of sedimentation tanks (1) are all connected to the buffer tank (2), the buffer tank (2) is connected to the adsorption tank (3), the resin module (4) includes a grease box (41) and a fluorine-removing resin (42), the grease box (41) is rotatably connected to the side wall of the adsorption tank (3), and the grease boxes (41) at the same level are grouped together, the directions of each group of grease boxes (41) are parallel, the fluorine-removing resin (42) is filled inside the grease box (41), and the ultrasonic transducer (5) is installed on the inner bottom of the adsorption tank (3); The sedimentation tank (1) performs pre-fluorination and discharges wastewater with a fluorine content that meets the standard into the buffer tank (2); during adsorption defluorination, the grease box (41) maintains a horizontal rotation direction and defluorinates the wastewater falling from the buffer tank (2) again; and during regeneration of the defluorination resin, the grease box (41) maintains a non-horizontal rotation direction and receives ultrasonic waves released by the ultrasonic transducer (5); The resin module (4) further comprises a gear (43), a chain (44) and a motor (45), a main shaft (411) is provided at both the front and rear ends of the grease box (41), the main shaft (411) is rotatably connected to the side wall of the adsorption tank (3), the gear (43) is mounted on the protruding end of the main shaft (411), a plurality of the chains (44) are respectively wound around two adjacent gears (43), and the motor (45) is connected to the main shaft (411) at one end; The main shafts (411) are staggered in the vertical direction, and the vibration direction of the ultrasonic transducer (5) is the vertical direction; The grease box (41) has two non-horizontal rotation directions: one grease box (41) is kept vertical, and the other grease box (41) has an angle of 10° to 45° with the vertical direction.

2. The environmentally friendly polymer resin defluorination equipment according to claim 1, characterized in that: A first solenoid valve (14) is provided on the pipeline between each sedimentation tank (1) and the buffer tank (2). The first solenoid valve (14) is an on-off valve, and the first solenoid valve (14) is installed on one side of the sedimentation tank (1).

3. The environmentally friendly polymer resin defluorination equipment according to claim 1, characterized in that: The adsorption tank (3) and the water purification tank (6) are connected, and a water pump (10) and a second solenoid valve (9) are installed on the pipeline connecting the adsorption tank (3) and the water purification tank (6). The water pump (10) is a two-way pump, and the second solenoid valve (9) is a three-position three-way valve.

4. The environmentally friendly polymer resin defluorination equipment according to claim 1, characterized in that: The particle sizes of the fluorine-removing resin (42) in the grease boxes (41) of different groups are different, and the particle diameters of the fluorine-removing resin (42) gradually decrease in the order from top to bottom of the grease boxes (41).

5. The environmentally friendly polymer resin defluorination equipment according to claim 4, characterized in that: The grease box (41) comprises a box body (412) and a box cover (413), wherein the box body (412) is connected to the main shaft (411), and the box cover (413) is detachably connected to the box body (412). When viewed from the front, the box cover (413) and the box body (412) are connected to form a waist-shaped shape, and elastic material is arranged on the outside of the box cover (413) and the arc structure of the box body (412).

6. The environmentally friendly polymer resin defluorination equipment according to claim 1, characterized in that: A third solenoid valve (13) is installed on the pipeline between the buffer tank (2) and the adsorption tank (3), and the third solenoid valve (13) is a flow control valve.

7. The environmentally friendly polymer resin defluorination equipment according to claim 1, characterized in that: A U-shaped pipe (7) is provided on the pipe between the adsorption tank (3) and the clean water tank (6), and a fluoride ion selective electrode (8) is installed inside both the U-shaped pipe (7) and the clean water tank (12).

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