High-efficiency fluorine removal integrated device

Abstract

This utility model discloses a high-efficiency integrated defluorination device, which includes a first defluorination tank, a second defluorination tank, and a PLC processing module connected in sequence. The first defluorination tank is equipped with a water inlet, a fan inlet, and an openable and closable cover with a sealing structure. Multiple sets of defluorination filter plates are detachably installed inside the tank, with the pore size of the filter plates decreasing progressively along the water flow direction. The tank body is equipped with a water outlet and a first air outlet, both equipped with first solenoid valves. The second defluorination tank is equipped with a defluorination agent tank on the top, with a second solenoid valve between the tank and the tank body. The tank body integrates a liquid level sensor and a bidirectional spiral stirring assembly, with the upper and lower spiral stirring components rotating in opposite directions. A drain outlet with a third solenoid valve is located on the bottom side of the tank body. The PLC processing module is equipped with a touch screen, which can control the solenoid valves and liquid level sensor to realize automated operation of the equipment. Therefore, this utility model effectively solves the problems of low processing efficiency, uneven mixing, and inconvenient operation and maintenance of traditional defluorination equipment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a high-efficiency integrated defluorination device. Background Technology

[0002] In high-precision industrial fields such as semiconductor manufacturing, flat panel display processing, and photovoltaic device production, fluorination processes are widely used in key steps such as etching, cleaning, and pattern transfer. These processes often utilize highly reactive fluoride compounds such as hydrogen fluoride (HF), fluorosilicic acid (H₂SiF₆), and ammonium fluoride (NH₄F). After completing their processing tasks, these substances often enter wastewater treatment systems as waste liquid, residual liquid, or process residue, forming wastewater containing high concentrations of fluoride ions. If such wastewater is discharged directly without effective treatment, it will not only cause fluoride pollution to the ecological environment but may also corrode and damage downstream equipment and pipelines, posing a potential threat to the health of workers. Therefore, how to efficiently and safely treat fluoride ions in industrial wastewater has become a key technical issue in the environmental governance process of the semiconductor and flat panel display industries.

[0003] Currently, common industrial defluorination technologies include chemical precipitation, adsorption, coagulation and sedimentation, membrane separation, and their combined processes. Among these, chemical precipitation is widely used due to its simplicity and low cost. It primarily involves adding reagents such as calcium salts, aluminum salts, and iron salts, causing fluoride ions to react and form insoluble fluoride precipitates, thus removing fluoride. However, existing defluorination equipment generally suffers from problems such as dispersed processing stages, complex structures, large footprints, and high energy consumption. During operation, inaccurate reagent dosing, insufficient stirring, and difficulty in replacing filter plates severely affect defluorination efficiency and the continuity and stability of the treatment process. Therefore, it is necessary to provide a highly efficient integrated defluorination device that is highly efficient, easy to maintain, and highly automated. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a high-efficiency integrated defluorination device, which effectively improves the problem of poor defluorination efficiency in some traditional high-efficiency integrated defluorination devices.

[0005] A high-efficiency integrated defluorination device includes a first defluorination tank, a second defluorination tank connected to the first defluorination tank, and a PLC processing module. The first defluorination tank has a water inlet and an air inlet connected to a fan on a first side. The top of the first defluorination tank is a closable cover, and a sealing rubber ring is provided on the side of the closable cover. Defluorination filter plates are sequentially snapped on and off from the side closest to the water inlet to the side furthest away from the water inlet. The screen holes on the filter plates are evenly spaced, and the diameter of the screen holes decreases from the side closest to the water inlet to the side furthest away from the water inlet. A first air outlet is provided at the top of a second side of the first defluorination tank, and a water outlet is provided at the bottom. A first solenoid valve is provided at the water outlet. The water inlet of the second defluorination tank is connected to the water outlet. A defluorinating agent tank is installed at the top of the first defluorinating tank. A second solenoid valve is installed between the defluorinating agent tank and the second defluorinating tank. A first liquid level sensor and a stirring assembly are installed inside the second defluorinating tank. The stirring assembly is connected to a stirring motor installed on the second defluorinating tank. A drain outlet is installed on the bottom side of the second defluorinating tank. A third solenoid valve is installed at the drain outlet. The stirring assembly includes a stirring rod and a first spiral stirring element and a second spiral stirring element arranged from top to bottom on the stirring rod. The spiral directions of the first spiral stirring element and the second spiral stirring element are opposite. A PLC processing module is installed on the side of the second defluorinating tank and includes a PLC processor and a touch screen. The PLC processor is connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, and the first liquid level sensor.

[0006] Preferably, the pitch of the first spiral agitator is smaller than the pitch of the second spiral agitator.

[0007] Preferably, the two opposite inner sidewalls of the first defluorination tank are recessed towards the outer sidewall and are provided with a plurality of T-shaped grooves. The bottom sidewalls of the first defluorination tank are recessed towards the outer sidewall and are provided with strip-shaped grooves. The periphery of the defluorination filter plate is provided with a pair of opposite T-shaped connectors. The sidewall of the defluorination filter plate connected to the sidewalls of the two T-shaped connectors is provided with a protruding strip-shaped connector.

[0008] Furthermore, the defluorination filter plate includes a frame and a filter element plate disposed within the frame, and the T-shaped connector and the strip connector are disposed around the periphery of the frame.

[0009] Preferably, a second vent is provided on the top side of the second defluorination tank.

[0010] Furthermore, a fourth solenoid valve and a fifth solenoid valve are respectively provided on the first air outlet and the second air outlet.

[0011] Preferably, the top of the openable cover is provided with a handle.

[0012] Preferably, a second liquid level sensor is provided inside the defluorinating agent tank, and the second liquid level sensor is connected to the PLC processor.

[0013] Furthermore, the first liquid level sensor and the second liquid level sensor are capacitive liquid level sensors or ultrasonic liquid level sensors.

[0014] Preferably, the PLC processor is a Siemens S7-1200 series PLC processor or an Omron CP1E series PLC processor with built-in known programs.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model provides a high-efficiency integrated defluorination device, comprising a first defluorination tank, a second defluorination tank connected to the first defluorination tank, and a PLC processing module. In operation, waste liquid enters the first defluorination tank through the inlet. The first defluorination tank contains multiple detachable defluorination filter plates with decreasing pore sizes, allowing for step-by-step filtration of the waste liquid during flow. This effectively enhances the interception of impurities of different particle sizes, improving defluorination efficiency and extending the lifespan of the filter plates. The waste liquid treated in the first defluorination tank then enters the second defluorination tank. A first liquid level sensor detects the liquid entering the second defluorination tank, and then a second solenoid valve opens, allowing defluorinating agent from the defluorinating agent tank to enter the second defluorination tank. Based on the liquid level data detected by the first liquid level sensor, an appropriate dosage of defluorinating agent is added, and then the second solenoid valve closes. The stirring assembly then operates. The first and second spiral stirring elements, with opposite spiral directions, create opposite flow directions for the upper and lower solutions, resulting in strong tumbling and mixing effects, thus promoting the mixing of the defluorinating agent and the waste liquid. After the reaction is complete, a third solenoid valve opens, and the treated liquid in the second defluorination tank is discharged through the drain, achieving effective defluorination treatment of the waste liquid. Therefore, this high-efficiency integrated defluorination equipment improves the defluorination efficiency and accuracy, and is well-suited for the centralized treatment of high-concentration fluoride-containing wastewater. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the high-efficiency integrated defluorination equipment described in this utility model;

[0018] in:

[0019] 10-First defluorination tank, 20-Second defluorination tank, 30-Water inlet, 40-Air inlet, 50-Defluorination filter plate, 60-First air outlet, 70-First solenoid valve, 80-Defluorination agent tank, 90-Second solenoid valve, 11-Stirring motor, 12-Third solenoid valve, 13-Stirring rod, 14-First spiral agitator, 15-Second spiral agitator, 16-First liquid level sensor, 17-Second liquid level sensor, 18-Second air outlet. Detailed Implementation

[0020] The embodiments described below are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0021] See Figure 1 This embodiment provides a high-efficiency integrated defluorination device, which includes a first defluorination tank 10, a second defluorination tank 20 connected to the first defluorination tank 10, and a PLC processing module 100.

[0022] Specifically, the first defluorination tank 10 has a water inlet 30 and an air inlet 40 connected to a fan on one of its first sides. The top of the first defluorination tank 10 is provided with an openable and closable cover, and a sealing rubber ring is provided on the side of the openable and closable cover. The first defluorination tank 10 is provided with defluorination filter plates 50 in sequence from the side closer to the water inlet 30 to the side farther away from the water inlet 30. The screen holes on the defluorination filter plates 50 are evenly spaced and the diameter of the screen holes decreases from the side closer to the water inlet 30 to the side farther away from the water inlet 30. The top of the second side of the first defluorination tank 10 is provided with a first air outlet 60 and the bottom is provided with a water outlet. A first solenoid valve 70 is provided at the water outlet.

[0023] The inlet of the second defluorination tank 20 is connected to the outlet. A defluorinating agent tank 80 is provided on the top of the second defluorination tank 20. A second solenoid valve 90 is provided between the defluorinating agent tank 80 and the second defluorination tank 20. A first liquid level sensor 16 and a stirring assembly are provided inside the second defluorination tank 20. The stirring assembly is connected to a stirring motor 11 provided on the second defluorination tank 20. A drain outlet is provided on the bottom side of the second defluorination tank 20. A third solenoid valve 12 is provided at the drain outlet. The stirring assembly includes a stirring rod 13 and a first spiral stirring element 14 and a second spiral stirring element 15 arranged from top to bottom on the stirring rod 13. The spiral directions of the first spiral stirring element 14 and the second spiral stirring element 15 are opposite.

[0024] The PLC processing module 100 is located on the side of the second defluorination tank 20 and includes a PLC processor and a touch screen. The PLC processor is connected to the first solenoid valve 70, the second solenoid valve 90, the third solenoid valve 12 and the first liquid level sensor 16.

[0025] It should be noted that when using this high-efficiency integrated defluorination equipment, the fluoride-containing waste liquid is first injected into the tank through the inlet 30 located on the side of the first defluorination tank 10. A blower pressurizes the inside of the tank through the air inlet 40, causing the waste liquid to flow under pressure through multiple defluorination filter plates 50 installed inside the tank. This also facilitates subsequent pressurization to quickly transfer the waste liquid from the first defluorination tank 10 to the second defluorination tank 20. Because the filter plates use a snap-on disassembly structure, maintenance and replacement are easy as needed. Furthermore, the filter plate pores gradually decrease in size from the side closer to the inlet 30 to the side farther away, enabling progressively fine filtration of suspended particles of different sizes, improving the initial defluorination effect, delaying filter plate clogging, and extending the equipment's service life.

[0026] Next, after the waste liquid is filtered in the first defluorination tank 10, the PLC processor controls the first solenoid valve 70 to open, allowing the waste liquid to flow out through the bottom outlet and into the connected second defluorination tank 20. Once the waste liquid enters the second defluorination tank 20, the first liquid level sensor 16 collects the liquid level information. When the liquid level reaches the set range, the first solenoid valve 70 closes, and the PLC processor controls the second solenoid valve 90 to open, allowing the defluorinating agent in the defluorinating agent tank 80 to be quantitatively injected into the second defluorination tank 20. After the defluorinating agent injection is complete, the second solenoid valve 90 automatically closes, and the stirring assembly starts. Driven by the stirring motor 11, the stirring rod 13 rotates. The first spiral stirring element 14 and the second spiral stirring element 15 on the stirring rod 13, due to their opposite spiral directions, act on liquid areas at different heights, creating vertical convection disturbances. This allows the defluorinating agent and waste liquid to mix rapidly and thoroughly, promoting the defluorination reaction efficiency. After the stirring reaction is complete, the stirring component is stopped. Once sufficient reaction time has elapsed, the third solenoid valve 12 opens, discharging the treated defluorinated liquid and completing one treatment cycle. Users can monitor the operational status of each stage—liquid level, dosing, stirring, and discharge—in real time via the touchscreen display on the PLC processing module 100. Control parameters can be adjusted according to actual needs. The system supports both manual and automatic operation modes, offering convenient operation and a high degree of automation, making it suitable for continuous treatment and centralized disposal of various high-fluoride waste liquids.

[0027] Preferably, the pitch of the first spiral agitator is smaller than that of the second spiral agitator. This allows the upper liquid to be more tightly agitated during mixing, helping to refine the liquid's flow layers, while the lower liquid benefits from stronger fluid circulation and mixing through the larger pitch of the agitator blades. This overall improves mixing uniformity and reaction efficiency. Furthermore, the different pitches effectively prevent dead zones and localized stagnation, ensuring sufficient contact and reaction between the defluorinating agent and the waste liquid, further enhancing the quality and speed of defluorination treatment.

[0028] Preferably, the two opposite inner sidewalls of the first defluorination tank 10 are each recessed towards the outer sidewall and have multiple T-shaped grooves. The bottom sidewalls of the first defluorination tank 10 are each recessed towards the outer sidewall and have strip-shaped grooves. The periphery of the defluorination filter plate 50 is provided with a pair of opposite T-shaped connectors, and one sidewall of the defluorination filter plate 50 connected to the sidewalls of the two T-shaped connectors is provided with a protruding strip-shaped connector. Further, the defluorination filter plate 50 includes a frame and a filter element plate disposed within the frame, and the periphery of the frame is provided with the T-shaped connectors and the strip-shaped connectors. The T-shaped connector slides into the T-groove on the inner wall of the first defluorination tank 10, allowing the defluorination filter plate 50 to be inserted and removed along the T-groove direction, facilitating quick replacement and regular cleaning of the filter plate. The strip-shaped connector engages with the strip groove on the bottom side wall of the first defluorination tank 10, positioning and limiting the lower part of the filter plate, thereby improving the overall installation stability and preventing the filter plate from shaking or shifting during liquid flow. Therefore, through the synergistic effect of the T-shaped and strip-shaped connectors, the filter plate is precisely guided and fixed in both vertical and horizontal directions, improving the reliability of equipment operation and the consistency of defluorination effect.

[0029] Preferably, a second vent 18 is provided on the top side of the second defluorination tank 20. The second vent 18 is used to release the gas pressure generated by stirring or chemical reaction during the defluorination reaction, preventing overpressure caused by gas accumulation inside the tank, thereby ensuring the safety and stability of equipment operation. Simultaneously, when the waste liquid in the first defluorination tank 10 enters the second defluorination tank 20, by closing the first vent 60 and opening the second vent 18, a one-way gas pressure guidance path is formed inside the tank. Furthermore, in conjunction with a blower that blows gas into the first defluorination tank 10 through the inlet 40, a certain positive pressure is created inside the tank, propelling the waste liquid smoothly from the outlet at the bottom of the first defluorination tank 10 into the second defluorination tank 20. This not only improves the waste liquid transport efficiency and reduces liquid residue, but also effectively avoids poor liquid transport caused by insufficient liquid level difference or internal resistance.

[0030] Furthermore, a fourth solenoid valve and a fifth solenoid valve are respectively provided on the first air outlet 60 and the second air outlet 18, and both the fourth solenoid valve and the fifth solenoid valve are connected to the PLC processor.

[0031] Preferably, the top of the closable cover is provided with a handle to facilitate opening the cover when replacing the defluorination filter plate 50.

[0032] Preferably, a second liquid level sensor 17 is installed inside the defluorinating agent tank 80, and the second liquid level sensor 17 is connected to the PLC processor. The PLC processor can collect the liquid level information in the defluorinating agent tank 80 in real time, thereby determining the amount of defluorinating agent entering the second defluorinating tank 20, and then controlling the closing of the second solenoid valve 90. Further, the first liquid level sensor 16 and the second liquid level sensor 17 are capacitive liquid level sensors or ultrasonic liquid level sensors.

[0033] Preferably, the PLC processor is a Siemens S7-1200 series PLC processor or an Omron CP1E series PLC processor with built-in known programs.

[0034] This utility model provides a high-efficiency integrated defluorination device, comprising a first defluorination tank 10, a second defluorination tank 20 connected to the first defluorination tank 10, and a PLC processing module 100. In use, waste liquid enters the first defluorination tank 10 through the inlet 30. The first defluorination tank 10 is equipped with multiple detachable defluorination filter plates 50, with decreasing pore sizes, allowing the waste liquid to be filtered step-by-step during flow. This effectively improves the interception capacity of impurities of different particle sizes, increases defluorination efficiency, and extends the service life of the filter plates. The waste liquid treated by the first defluorination tank 10 then enters the second defluorination tank 20. A first liquid level sensor 16 detects the liquid entering the second defluorination tank 20, and then a second solenoid valve 90 opens, allowing defluorinating agent from the defluorinating agent tank 80 to enter. The solution is introduced into the second defluorination tank 20. Based on the liquid level data detected by the first liquid level sensor 16, an appropriate dose of defluorinating agent is added. Then, the second solenoid valve 90 closes, and the stirring assembly operates. The first spiral stirrer 14 and the second spiral stirrer 15, with opposite spiral directions, create opposite flow directions in the upper and lower parts of the solution, resulting in a strong tumbling and mixing effect. This promotes the mixing of the defluorinating agent and the waste liquid. After the reaction is complete, the third solenoid valve 12 opens, and the treated liquid in the second defluorination tank 20 is discharged through the drain, achieving effective defluorination treatment of the waste liquid. Therefore, this high-efficiency integrated defluorination equipment improves the defluorination treatment efficiency and accuracy, and is well-suited for the centralized treatment of high-concentration fluoride-containing wastewater.

[0035] The above-disclosed embodiments are merely some preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.

Claims

1. A high-efficiency integrated defluorination device, comprising a first defluorination tank, a second defluorination tank connected to the first defluorination tank, and a PLC processing module, characterized in that: The first defluorination tank has a water inlet and an air inlet connected to a fan on one side. The top of the first defluorination tank is a closable cover, and a sealing rubber ring is provided on the side of the closable cover. The first defluorination tank is provided with defluorination filter plates that are sequentially snapped on and off from the side closer to the water inlet to the side farther away from the water inlet. The screen holes on the defluorination filter plates are evenly spaced and the diameter of the screen holes decreases from the side closer to the water inlet to the side farther away from the water inlet. The top of the second side of the first defluorination tank is provided with a first air outlet, and the bottom is provided with a water outlet. A first solenoid valve is provided at the water outlet. The inlet of the second defluorination tank is connected to the outlet. A defluorination agent tank is provided on the top of the second defluorination tank. A second solenoid valve is provided between the defluorination agent tank and the second defluorination tank. A first liquid level sensor and a stirring assembly are provided inside the second defluorination tank. The stirring assembly is connected to a stirring motor provided on the second defluorination tank. A drain outlet is provided on the bottom side of the second defluorination tank. A third solenoid valve is provided at the drain outlet. The stirring assembly includes a stirring rod and a first spiral stirring element and a second spiral stirring element arranged from top to bottom on the stirring rod. The spiral directions of the first spiral stirring element and the second spiral stirring element are opposite. The PLC processing module is located on the side of the second defluorination tank and includes a PLC processor and a touch screen. The PLC processor is connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, and the first liquid level sensor.

2. The high-efficiency integrated defluorination equipment as described in claim 1, characterized in that, The pitch of the first spiral agitator is smaller than the pitch of the second spiral agitator.

3. The high-efficiency fluorine removal integrated apparatus according to claim 1, wherein The first defluorination tank has multiple T-shaped grooves recessed into its two opposite inner sidewalls towards the outer sidewall. The bottom sidewall of the first defluorination tank has a strip-shaped groove recessed into its outer sidewall. The defluorination filter plate has a pair of opposite T-shaped connectors on its periphery. The sidewall of the defluorination filter plate that connects to the sidewall of the two T-shaped connectors has a protruding strip-shaped connector.

4. The high-efficiency integrated defluorination equipment as described in claim 3, characterized in that, The defluorination filter plate includes a frame and a filter element plate disposed within the frame. The T-shaped connector and the strip connector are disposed around the periphery of the frame.

5. The high-efficiency fluorine removal integrated apparatus according to claim 1, wherein The second defluorination tank has a second vent on its top side.

6. The high-efficiency integrated defluorination equipment as described in claim 5, characterized in that, A fourth solenoid valve and a fifth battery valve are respectively provided on the first air outlet and the second air outlet.

7. The high-efficiency fluorine removal integrated apparatus according to claim 1, wherein The top of the closable cover is equipped with a handle.

8. The high-efficiency integrated defluorination equipment as described in claim 1, characterized in that, The defluorinating agent tank is equipped with a second liquid level sensor, which is connected to the PLC processor.

9. The high-efficiency integrated defluorination equipment as described in claim 8, characterized in that, The first liquid level sensor and the second liquid level sensor are capacitive liquid level sensors or ultrasonic liquid level sensors.

10. The high efficiency fluoride removal integrated apparatus of claim 1, wherein, The PLC processor is either a Siemens S7-1200 series PLC processor or an Omron CP1E series PLC processor with a built-in known program.

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