High-salt wastewater rare earth flocculant dosing device

Abstract

The application discloses a high-salinity wastewater rare earth flocculant adding device and relates to the technical field of industrial wastewater treatment equipment. The application comprises a dosing box, a first stirring roller is rotationally arranged in the dosing box, a motor is arranged on the upper side of the dosing box and is in transmission cooperation with the first stirring roller, a dosing pump is arranged below the dosing box, a venturi jet device is connected to the outlet of the dosing pump, and a detection instrument for detecting wastewater parameters is arranged in the dosing box. The venturi jet device connected to the outlet of the dosing pump is used to fully mix and disperse the flocculant solution and the treated water by using the negative pressure generated by the high-speed water flow, so that the mixed solution is formed and then enters the reaction tank, the colloidal protection phenomenon caused by the excessively high local concentration of the flocculant in the traditional adding mode is avoided, and the flocculation efficiency of the rare earth flocculant in the high-salinity wastewater is further improved.

Description

Technical Field

[0001] This invention belongs to the field of industrial wastewater treatment equipment, specifically, it relates to a device for adding rare earth flocculants to high-salt wastewater. Background Technology

[0002] Rare earth elements, due to their unique electronic structure and physicochemical properties, exhibit significant application potential in the field of flocculants. Studies have shown that introducing rare earth elements (such as lanthanum and cerium) into traditional flocculants (such as polyaluminum chloride) can optimize the flocculant's speciation: the addition of rare earth elements can reduce the content of monomeric aluminum (Ala), promoting the polymerization of aluminum ions to form a higher content of polymeric states (Alc), thereby enhancing the flocculant's adsorption bridging ability and charge neutralization effect. Compared to traditional flocculants, rare earth composite flocculants can achieve superior turbidity removal, phosphorus removal, and COD removal effects at lower dosages.

[0003] However, in high-salinity wastewater treatment scenarios, the high efficiency of rare earth composite flocculants relies heavily on precise and stable dosing control. The high concentration of ions in high-salinity wastewater not only affects the hydrolysis form and charge characteristics of flocculants, but also places more stringent requirements on the corrosion resistance, metering accuracy, and adaptability of the dosing device. Traditional flocculant dosing devices often suffer from problems such as metering pumps being susceptible to salt spray corrosion, delayed dosing adjustment response, and difficulty in real-time dynamic adjustment based on water quality fluctuations. This leads to a reduction in the utilization rate of rare earth flocculants, and may even affect the flocculation effect due to local over- or under-dosing, increasing treatment costs or causing the effluent quality to fail to meet standards. Therefore, in response to the characteristics of high-salinity wastewater, a more precise and stable dosing control is needed.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a rare earth flocculant dosing device for high-salt wastewater, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A rare earth flocculant dosing device for high-salt wastewater includes: a dosing box, a first stirring roller rotatably fitted inside the dosing box, and a motor that drives the first stirring roller on the upper side of the dosing box. The upper side of the dosing box has an inner cavity, and two second stirring rollers are rotatably fitted inside the dosing box. A movable plate is slidably fitted inside the inner cavity. Two bearings are provided on one side of the movable plate. A first rotating roller is provided on the inner side of each of the two bearings and is fixedly connected to the two second stirring rollers respectively. A linear telescopic component connected to the movable plate is provided on the upper side of the dosing box. The two first rotating rollers are driven by the motor. A dosing pump is installed below the dosing tank, and a Venturi jet is connected to the outlet of the dosing pump. A detection instrument for detecting wastewater parameters is installed inside the dosing tank, and a control system electrically connected to the detection instrument, the dosing pump, the linear telescopic component, and the motor is installed on the dosing tank.

[0007] Optionally, grooves are provided on both sides of the inner wall of the cavity, and the two ends of the movable plate are slidably fitted in the two grooves respectively. Two fixed grooves are provided on one side of the movable plate, and the two bearings are respectively set in the two fixed grooves.

[0008] Optionally, two fixing plates are provided in the inner cavity, and each fixing plate has a through hole on one side. A rotating roller is rotatably fitted in the two through holes. A worm is provided at one end of the motor output shaft, and a worm wheel that meshes with the worm is provided on the circumference of the middle end of the rotating roller.

[0009] Optionally, the inner cavity has two second rotating rollers that rotate in a rotatable manner. Each of the two first rotating rollers has a rectangular groove at one end, and the two second rotating rollers are slidably fitted in the two rectangular grooves. Each of the two rotating rollers has a first bevel gear at both ends, and the two second rotating rollers have a second bevel gear on their circumference that meshes with the first bevel gear.

[0010] Optionally, the linear telescopic component is an electric telescopic rod, a hydraulic cylinder, or a pneumatic cylinder, and the output end of the linear telescopic component is located inside the inner cavity and is fixedly connected to the movable plate.

[0011] Optionally, an observation window is provided on the side wall of the dosing box.

[0012] Optionally, the bottom of the dosing box is configured as a funnel-shaped mud collection hopper, and a mud discharge pipe is provided at the bottom of the mud collection hopper, with an air discharge valve installed on the mud discharge pipe.

[0013] Optionally, the control system includes a PLC controller, a touch screen, and a data acquisition module.

[0014] Optionally, the PLC controller is electrically connected to the touch screen, the data acquisition module, the detection instrument, the dosing pump, the linear telescopic component, and the motor, respectively. The data acquisition module is used to receive wastewater parameter signals detected by the detection instrument and transmit them to the PLC controller.

[0015] Optionally, the touch screen is used to realize human-machine interaction, and can perform parameter setting, operation status display and fault alarm functions. The PLC controller automatically controls the start and stop of the dosing pump and the flow rate, the extension and retraction of the linear telescopic component and the speed of the motor according to the preset program and the detected wastewater parameters, thereby realizing the precise addition of flocculant and intelligent adjustment of the stirring process.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time: By using a coordinated stirring structure with a first stirring roller and two second stirring rollers, the mixing uniformity of rare earth flocculants in the dosing tank can be significantly improved. While the motor drives the first stirring roller to rotate for main stirring, the power is transmitted to the two second stirring rollers through a worm gear, worm wheel, rotating roller, first bevel gear, second bevel gear, and the sliding engagement of the second rotating roller with the first rotating roller in a rectangular groove, so that the two rollers rotate synchronously. With the help of a linear telescopic component, the movable plate is driven to slide up and down along the groove, which drives the second stirring rollers to adjust their height position in the dosing tank. When treating high-salt wastewater of different concentrations or characteristics, and it is necessary to adjust the stirring intensity and range of the flocculant, the control system can control the movement of the linear telescopic component to change the stirring depth of the second stirring roller, so as to achieve more refined stirring of the flocculant solution and avoid local uneven concentration from affecting the subsequent dosing effect. Especially in a high-salt environment, a uniform flocculant solution can better resist ion interference and ensure its flocculation activity. Through the established control system, the PLC controller receives real-time data from monitoring instruments on key parameters of the high-salt wastewater, such as turbidity, pH value, conductivity, COD concentration, and the level of rare earth flocculant in the dosing tank. When a sudden increase in wastewater turbidity is detected, the PLC controller quickly calculates the required flocculant dosage adjustment value based on a preset mathematical model and immediately sends a command to the dosing pump to precisely adjust its motor speed or stroke length, achieving real-time dynamic response of the dosing flow rate. For example, within a flow range of 0-500 L / h, the adjustment accuracy can reach ±1%. Simultaneously, the control system allows for the preset of dosing parameters under different operating conditions via a touchscreen. For example, to address the water quality fluctuations of high-salinity wastewater in different seasons and production cycles, operators can pre-set the corresponding dosage curve as a function of time or water quality parameters. The system can automatically add the flocculant according to the curve. The Venturi jet connected to the dosing pump outlet uses the negative pressure generated by the high-speed water flow to fully mix and disperse the flocculant solution with the treated water, forming a uniform mixture before entering the reaction tank. This avoids the colloidal protection phenomenon caused by excessively high local concentrations of flocculant in traditional dosing methods, further improving the flocculation efficiency of rare earth flocculants in high-salinity wastewater. This ensures that the flocculant can react quickly with the wastewater while being precisely added, thereby stably guaranteeing that the effluent water quality meets the standards.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 This is a schematic diagram of the dosing box structure; Figure 2 This is a schematic diagram of a dosing pump. Figure 3 This is a schematic diagram of a linear telescopic component. Figure 4 This is a schematic diagram of the movable panel structure; Figure 5 This is a schematic diagram of the roller structure.

[0019] The attached diagram lists the components represented by each number as follows: 1. Dosing tank; 2. Dosing pump; 3. Venturi jet injector; 4. Observation window; 5. Motor; 7. First stirring roller; 8. Second stirring roller; 9. Inner cavity; 10. First rotating roller; 11. Second rotating roller; 12. Movable plate; 13. Channel; 14. Bearing; 15. Linear telescopic component; 17. Fixed plate; 18. Rotating roller; 20. Worm gear; 21. Worm wheel; 22. First bevel gear; 23. Second bevel gear; 24. Rectangular groove; 25. Sludge discharge pipe; 26. Drain valve.

[0020] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0021] The invention will now be described in further detail with reference to the accompanying drawings.

[0022] Please see Figure 1-5 As shown, this embodiment provides a rare earth flocculant dosing device for high-salt wastewater, including: a dosing box 1, a first stirring roller 7 rotatably fitted inside the dosing box 1, and a motor 5 that drives the first stirring roller 7 on the upper side of the dosing box 1. The upper side of the dosing box 1 is provided with an inner cavity 9. Two second stirring rollers 8 are rotatably fitted inside the dosing box 1. A movable plate 12 is slidably fitted inside the inner cavity 9. Two bearings 14 are provided on one side of the movable plate 12. A first rotating roller 10 is provided on the inner side of each of the two bearings 14 and is fixedly connected to the two second stirring rollers 8 respectively. A linear telescopic component 15 connected to the movable plate 12 is provided on the upper side of the dosing box 1. The two first rotating rollers 10 are driven by the motor 5. A dosing pump 2 is installed below the dosing tank 1. A Venturi jet 3 is connected to the outlet of the dosing pump 2. A detection instrument for detecting wastewater parameters is installed inside the dosing tank 1. A control system is installed on the dosing tank 1 that is electrically connected to the detection instrument, the dosing pump 2, the linear telescopic component 15 and the motor 5.

[0023] The coordinated stirring structure of the first stirring roller 7 and two second stirring rollers 8 significantly improves the mixing uniformity of rare earth flocculants in the dosing tank 1. While the motor 5 drives the first stirring roller 7 to rotate for main stirring, power is transmitted to the two second stirring rollers 8 through the worm gear 20, worm wheel 21, rotating roller 18, first bevel gear 22, second bevel gear 23, and the sliding engagement of the second rotating roller 11 with the rectangular groove 24 of the first rotating roller 10. This causes the two rollers to rotate synchronously. The linear telescopic component 15 drives the movable plate 12 to slide up and down along the channel 13, thus moving the second stirring rollers 8 within the dosing tank 1. The height position can be adjusted to control the movement of the linear telescopic component 15 when treating high-salt wastewater of different concentrations or characteristics, requiring adjustment of the flocculant stirring intensity and range. This changes the stirring depth of the second stirring roller 8, achieving more refined stirring of the flocculant solution and avoiding uneven local concentrations that could affect subsequent dosing effects. Especially in high-salt environments, a uniform flocculant solution can better resist ion interference and ensure its flocculation activity. Through the set control system, the PLC controller receives real-time data from monitoring instruments on key parameters of the high-salt wastewater, such as turbidity, pH value, conductivity, and C. Data such as OD concentration and rare earth flocculant level in dosing tank 1 are used to quickly calculate the required flocculant dosage adjustment value based on a preset mathematical model when a sudden increase in wastewater turbidity is detected. The PLC controller then immediately sends a command to dosing pump 2 to precisely adjust its motor speed or stroke length, achieving real-time dynamic response of the dosing flow rate. For example, within a flow range of 0-500 L / h, the adjustment accuracy can reach ±1%. Simultaneously, the control system allows for preset dosing parameter curves under different operating conditions via a touchscreen, such as those addressing water quality fluctuations in high-salinity wastewater during different seasons and production cycles. Furthermore, operators can pre-set the corresponding dosage curve as a function of time or water quality parameters, and the system can automatically add the flocculant according to the curve. The Venturi jet 3 connected to the outlet of the dosing pump 2 uses the negative pressure generated by the high-speed water flow to fully mix and disperse the flocculant solution with the treated water, forming a uniform mixture before entering the reaction tank. This avoids the colloidal protection phenomenon caused by excessively high local concentration of flocculant in traditional dosing methods, further improving the flocculation efficiency of rare earth flocculants in high-salt wastewater, ensuring that they can react quickly with the wastewater while being accurately added, thereby stably ensuring that the effluent water quality meets the standards.

[0024] like Figure 3-5As shown, in this embodiment, grooves 13 are provided on both sides of the inner wall of the inner cavity 9. The two ends of the movable plate 12 are slidably fitted in the two grooves 13 respectively. Two fixed grooves are provided on one side of the movable plate 12, and two bearings 14 are respectively set in the two fixed grooves. Two fixed plates 17 are provided in the inner cavity 9. Through holes are provided on one side of each fixed plate 17. Rollers 18 are rotatably fitted in the two through holes. A worm gear 20 is provided at one end of the output shaft of the motor 5. A worm wheel 21 that meshes with the worm gear 20 is provided on the circumference of the middle end of the roller 18. The inner cavity 9 contains two second rollers 11 that rotate and engage. Each of the two first rollers 10 has a rectangular groove 24 at one end. The two second rollers 11 are slidably engaged in the two rectangular grooves 24. Each of the two rollers 18 has a first bevel gear 22 at both ends. Each of the two second rollers 11 has a second bevel gear 23 that meshes with the first bevel gear 22 on its periphery. The linear telescopic member 15 is an electric telescopic rod, a hydraulic cylinder, or a pneumatic cylinder. The output end of the linear telescopic member 15 is located in the inner cavity 9 and is fixedly connected to the movable plate 12.

[0025] When motor 5 and linear telescopic component 15 are started, the output shaft of motor 5 drives worm 20 to rotate. Since worm 20 meshes with worm gear 21 on the circumference of the middle end of roller 18, roller 18 is driven to rotate within the through holes of the two fixed plates 17. When roller 18 rotates, the first bevel gears 22 at both ends of roller 18 rotate synchronously. The first bevel gears 22 mesh with the second bevel gears 23 on the circumference of the second roller 11, thereby driving the two second rollers 11 to rotate. At this time, since the second roller 11 slides in the rectangular groove 24 at one end of the first roller 10, and the first roller 10 is fixed in the fixed groove of the movable plate 12 by bearing 14, the rotational motion of the second roller 11 is transmitted to the first roller 10 through the rectangular groove 24, causing the first roller 10 to rotate. The second stirring roller 8, which is fixedly connected to it, rotates inside the dosing tank 1 to achieve the stirring function. At the same time, the linear telescopic component 15 is activated, and its output end pushes or pulls the movable plate 12. The two ends of the movable plate 12 slide up and down in the groove 13 on the inner wall of the upper inner cavity 9 of the dosing tank 1. The sliding of the movable plate 12 drives the bearing 14, the first rotating roller 10 and the second stirring roller 8 to adjust their overall height. During this process, the second rotating roller 11 slides axially in the rectangular groove 24 of the first rotating roller 10 to ensure that the power transmission is not interrupted due to the change in the height of the second stirring roller 8. Thus, the second stirring roller 8 can move up and down while rotating and stirring, so as to achieve the purpose of stirring the rare earth flocculant solution in the dosing tank 1 at different depths.

[0026] like Figure 2As shown, an observation window 4 is provided on the side wall of the dosing tank 1 in this embodiment. The observation window 4 is made of high-strength transparent acrylic material with a thickness of 8mm, which can withstand a certain pressure that may be generated inside the dosing tank 1. At the same time, it has good corrosion resistance and can resist the erosion of rare earth flocculant solution for a long time. The size of the observation window 4 is 300mm×200mm, extending from the upper part to the lower part of the side wall of the dosing tank 1, almost covering the entire height range of the inner cavity of the dosing tank 1. The operator can clearly see the liquid level of the rare earth flocculant solution in the dosing tank 1 and the state of the solution during the stirring process through the observation window 4, such as whether there is sedimentation and whether it is mixed evenly. On the inner side wall of the observation window 4, there are also clear liquid level scale lines. The smallest division of the scale line is 1cm, starting from the bottom of the dosing tank 1. The highest scale line corresponds to the maximum volume of the dosing tank 1, which makes it convenient for the operator to accurately read the liquid level of the solution and add or adjust the agent according to actual needs.

[0027] like Figure 2 As shown, in this embodiment, the bottom of the dosing tank 1 is configured as a funnel-shaped sludge collection hopper. A sludge discharge pipe 25 is located at the bottom of the sludge collection hopper, and an emptying valve 26 is installed on the sludge discharge pipe 25. The sludge collection hopper is tilted at 60 degrees to ensure that the sediment in the dosing tank 1 can smoothly slide to the bottom under gravity, preventing accumulation at the bottom. The sludge discharge pipe 25 is made of DN50 stainless steel, which has strong corrosion resistance and wear resistance, and can effectively transport sludge that may contain solid particles. The emptying valve 26 is a manual butterfly valve. The valve body is made of cast iron, and the valve plate is sealed with rubber, which has good sealing performance and is easy to operate. The valve can be opened and closed by rotating the handwheel. When it is necessary to clean the sediment at the bottom of the dosing tank 1, the operator only needs to turn off the dosing pump 2 and open the drain valve 26 to discharge the sludge in the tank through the sludge discharge pipe 25. After the sludge is discharged, the drain valve 26 is closed, and subsequent agent addition and stirring operations can be carried out. This ensures the cleanliness of the inside of the dosing tank 1 and avoids the sediment from affecting the flocculant ratio and dosing accuracy.

[0028] The control system in this embodiment includes a PLC controller, a touch screen, and a data acquisition module. The PLC controller is electrically connected to the touch screen, the data acquisition module, the detection instrument, the dosing pump 2, the linear telescopic component 15, and the motor 5. The data acquisition module receives wastewater parameter signals detected by the detection instrument and transmits them to the PLC controller. The touch screen enables human-machine interaction, allowing for parameter setting, operation status display, and fault alarm functions. The PLC controller automatically controls the start / stop and flow rate of the dosing pump 2, the extension / retraction of the linear telescopic component 15, and the speed of the motor 5 according to a preset program and the detected wastewater parameters, thereby achieving precise flocculant dosing and intelligent adjustment of the stirring process. The PLC controller, as the core of the control system, uses a high-performance industrial-grade chip, possessing fast data processing capabilities and stable operational reliability. It can simultaneously process multiple input / output signals, ensuring coordinated operation between various actuators. The touch screen is a 10.1-inch high-definition color touchscreen with an intuitive and user-friendly interface. Operators can easily set key parameters such as flocculant dosage, stirring time, and motor speed via touch screen operation. Simultaneously, the screen displays real-time operating data including the dosing tank level, dosing pump status, wastewater turbidity, and pH value. In case of dosing pump failure, abnormal liquid level, or communication interruption of the monitoring instruments, the touch screen will immediately display a prominent fault alarm message accompanied by a buzzer alarm, reminding operators to handle the situation promptly. The data acquisition module is equipped with a high-precision A / D conversion unit, capable of accurately acquiring 4-20mA standard current signals or 0-10V standard voltage signals transmitted from the monitoring instruments, with a acquisition frequency of up to 10 times / second. This ensures the real-time and accuracy of wastewater parameter data, providing a reliable basis for the precise control of the PLC controller. Through this control system, the entire dosing device achieves a fully automated process from wastewater parameter detection, flocculant ratio, dosage adjustment to stirring and mixing, effectively reducing manual operation intensity and improving the accuracy and stability of flocculant dosing in the treatment of high-salt wastewater.

[0029] Working principle: When the high-salt wastewater treatment system is started, a certain amount of rare earth flocculant and an appropriate amount of dilution water are first added into the dosing tank 1 through the feeding port. Then, the operator sets the target dosing parameters on the touch screen of the control system, such as the basic dosing flow rate, the speed of the stirring motor 5, and the stirring time. After the system is started, the motor 5 starts to work, and its output shaft drives the first stirring roller 7 to rotate in the dosing tank 1 to initially stir the solution in the tank. At the same time, the worm 20 at the output shaft end of the motor 5 meshes with the worm wheel 21 on the rotating roller 18, driving the rotating roller 18 to rotate. The first bevel gears 22 at both ends of the rotating roller 18... The two rollers 11 are respectively engaged with the second bevel gears 23 on the two second rollers 11, causing the second rollers 11 to rotate. Then, through the sliding engagement of the rectangular groove 24 with the first roller 10, the two second stirring rollers 8 are driven to rotate synchronously. At this time, the control system can control the linear telescopic component 15 to move according to the preset program or the initial solution state fed back by the detection instrument, push the movable plate 12 to slide up and down along the channel 13, adjust the height position of the second stirring rollers 8, realize the all-round and fine stirring of the solution at different depths in the dosing tank 1, ensure that the rare earth flocculant is fully dissolved and mixed evenly, and form a flocculant solution with stable concentration. During the stirring process, the detection instrument in the dosing tank 1 monitors the liquid level, concentration and other parameters of the solution in real time, and transmits the data to the PLC controller through the data acquisition module. After the stirring is completed, the PLC controller calculates the required amount of flocculant to be added based on the real-time parameters of the high-salt wastewater collected by the detection instrument (such as turbidity, pH value, etc.) and the preset mathematical model. Then, it sends a control command to the dosing pump 2. The dosing pump 2 starts and pumps the flocculant solution in the dosing tank 1 out according to the set flow rate. The flocculant solution enters the Venturi jet 3 through the outlet of the dosing pump 2. In the Venturi jet 3, the high-speed flowing treatment water generates negative pressure, which fully draws in the flocculant solution and mixes and disperses it vigorously to form a uniform mixture. Then, the mixture enters the reaction tank together and undergoes a flocculation reaction with the high-salt wastewater. During operation, the control system continuously monitors wastewater parameters and device operating status. If an increase in wastewater turbidity is detected, the PLC controller will immediately adjust the flow rate of the dosing pump 2 to increase the flocculant dosage. If the liquid level is lower than the set value, the touch screen will issue an alarm to remind the operator to replenish the reagent in time. When it is necessary to clean the sediment at the bottom of the dosing tank 1, the dosing pump 2 and motor 5 are turned off, and the drain valve 26 is opened. The sediment is discharged through the sludge discharge pipe 25 under the guidance of the funnel-shaped sludge collection hopper, ensuring that the inside of the dosing tank 1 is clean and does not affect the subsequent reagent ratio and dosing accuracy. The whole process realizes fully automated control from reagent stirring and parameter detection to precise dosing, effectively improving the treatment efficiency of high-salt wastewater and the stability of effluent quality.

[0030] This invention is not limited to the embodiments described above. Anyone should understand that structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention. Technical aspects, shapes, and structures not described in detail in this invention are all prior art.

Claims

1. A device for adding rare earth flocculant to high-salt wastewater, characterized in that, include: A dosing box (1) is provided, in which a first stirring roller (7) is rotatably fitted, and a motor (5) is provided on the upper side of the dosing box (1) to drive the first stirring roller (7). The upper side of the dosing box (1) is provided with an inner cavity (9). There are two second stirring rollers (8) rotating in the dosing box (1). A movable plate (12) is slidably fitted in the inner cavity (9). Two bearings (14) are provided on one side of the movable plate (12). The inner side of each of the two bearings (14) is provided with a first rotating roller (10) that is fixedly connected to the two second stirring rollers (8). A linear telescopic component (15) connected to the movable plate (12) is provided on the upper side of the dosing box (1). The two first rotating rollers (10) are driven by the motor (5). A dosing pump (2) is installed below the dosing tank (1). A Venturi jet (3) is connected to the outlet of the dosing pump (2). A detection instrument for detecting wastewater parameters is installed inside the dosing tank (1). A control system is installed on the dosing tank (1) that is electrically connected to the detection instrument, the dosing pump (2), the linear telescopic component (15), and the motor (5).

2. The rare earth flocculant dosing device for high-salt wastewater according to claim 1, characterized in that, The inner wall of the inner cavity (9) is provided with grooves (13) on both sides. The two ends of the movable plate (12) are respectively slidably fitted in the two grooves (13). Two fixed grooves are provided on one side of the movable plate (12), and the two bearings (14) are respectively set in the two fixed grooves.

3. The rare earth flocculant dosing device for high-salt wastewater according to claim 1, characterized in that, Two fixing plates (17) are provided in the inner cavity (9). Each fixing plate (17) has a through hole on one side. A rotating roller (18) is rotatably fitted in the two through holes. A worm (20) is provided at one end of the output shaft of the motor (5). A worm wheel (21) that meshes with the worm (20) is provided on the circumference of the middle end of the rotating roller (18).

4. The rare earth flocculant dosing device for high-salt wastewater according to claim 3, characterized in that, The inner cavity (9) contains two second rollers (11) that rotate and engage. One end of each of the two first rollers (10) is provided with a rectangular groove (24). The two second rollers (11) are slidably engaged in the two rectangular grooves (24). Both ends of the rollers (18) are provided with first bevel gears (22). The two second rollers (11) are provided with second bevel gears (23) that mesh with the first bevel gears (22) on their periphery.

5. The rare earth flocculant dosing device for high-salt wastewater according to claim 1, characterized in that, The linear telescopic component (15) is an electric telescopic rod, a hydraulic cylinder or a pneumatic cylinder. The output end of the linear telescopic component (15) is located in the inner cavity (9) and is fixedly connected to the movable plate (12).

6. The rare earth flocculant dosing device for high-salt wastewater according to claim 1, characterized in that, An observation window (4) is provided on the side wall of the dosing box (1).

7. The rare earth flocculant dosing device for high-salt wastewater according to claim 1, characterized in that, The bottom of the dosing box (1) is configured as a funnel-shaped mud collection hopper, and a mud discharge pipe (25) is provided at the bottom of the mud collection hopper. An air discharge valve (26) is provided on the mud discharge pipe (25).

8. The rare earth flocculant dosing device for high-salt wastewater according to claim 1, characterized in that, The control system includes a PLC controller, a touch screen, and a data acquisition module.

9. The rare earth flocculant dosing device for high-salt wastewater according to claim 8, characterized in that, The PLC controller is electrically connected to the touch screen, the data acquisition module, the detection instrument, the dosing pump (2), the linear telescopic component (15), and the motor (5). The data acquisition module is used to receive the wastewater parameter signals detected by the detection instrument and transmit them to the PLC controller.

10. A rare earth flocculant dosing device for high-salt wastewater according to claim 9, characterized in that, The touch screen is used to realize human-machine interaction and can perform parameter setting, operation status display and fault alarm functions. The PLC controller automatically controls the start and stop of the dosing pump (2) and the flow rate, the extension and retraction of the linear telescopic component (15) and the speed of the motor (5) according to the preset program and the detected wastewater parameters, so as to realize the precise addition of flocculant and intelligent adjustment of the stirring process.

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