Lead metal smelting wastewater treatment device

Abstract

The invention discloses a lead metal smelting wastewater treatment device, and belongs to the technical field of lead metal smelting. The device comprises an adjusting storage device playing a buffering role, and a first pH sensor and a first ORP sensor are arranged on the inner side of the adjusting storage device; the device further comprises a neutralization chamber communicated with the adjusting and storing device, a coagulation chamber communicated with the neutralization chamber and a flocculation chamber communicated with the coagulation chamber, a second pH sensor is arranged in the neutralization chamber, a second ORP sensor is arranged in the coagulation chamber, and a second pH sensor is arranged in the flocculation chamber. A first full-automatic dosing device for adjusting the pH value of the wastewater is arranged between the adjusting storage device and the neutralization chamber in a matched manner; and a second full-automatic dosing device for adding a flocculating agent is arranged above the coagulation chamber. When the device is used, a sensor in the storage device is adjusted to obtain original wastewater data in real time, a control system prejudges the alkali amount in advance, and feedforward control can be realized by utilizing an AI model to effectively cope with possible impact loads.

Description

Technical Field

[0001] This invention relates to the field of lead metal smelting, and in particular to a wastewater treatment device for lead metal smelting. Background Technology

[0002] Lead smelting is the process of converting lead ore or waste lead materials into metallic lead through high-temperature reduction or chemical reaction.

[0003] Lead smelting generates a significant amount of wastewater, which generally requires treatment before discharge or reuse. Wastewater treatment involves several steps: first, large suspended solids are removed and the water quality and quantity are balanced using a screen and equalization tank; then, during neutralization and sedimentation, an alkaline solution is added to adjust the pH, causing lead ions to precipitate as hydroxides; subsequently, coagulation and sedimentation stages involve adding coagulants such as polyaluminum chloride to promote the coagulation and sedimentation of suspended solids and colloids; finally, after disinfection, the treated wastewater can be reused or discharged. The treatment process utilizes devices including equalization tanks, sedimentation tanks, inclined plate settlers, and multi-media filters.

[0004] In wastewater treatment, when high-concentration acidic wastewater enters the treatment system, an appropriate proportion of alkaline solution needs to be added based on its volume and pH value. After the alkaline solution is added, sufficient mixing and reaction time are required for the pH sensor to accurately detect the overall pH change. During this period, if a system problem occurs, the PID controller will detect the pH deviation and require increasing the dosage to adjust. However, there is a time delay between detecting the deviation and the agent actually taking effect, which can cause significant pH fluctuations. If not properly controlled, these fluctuations may affect the subsequent coagulation treatment effect. Summary of the Invention

[0005] This invention provides a wastewater treatment device for lead metal smelting, which can solve the problem in the prior art where there is a time delay between deviation and the actual effect of the reagent, which will cause obvious fluctuations in pH value, and such fluctuations may affect the effect of subsequent coagulation treatment.

[0006] A wastewater treatment device for lead smelting includes a regulating and storage device that acts as a buffer. A first pH sensor and a first ORP sensor are installed inside the regulating and storage device. The device also includes a neutralization chamber, a coagulation chamber, and a flocculation chamber connected to the regulating and storage device. A second pH sensor is installed in the neutralization chamber, and a second ORP sensor is installed in the coagulation chamber. A first fully automatic dosing device for adjusting the pH value of the wastewater is installed between the regulating and storage device and the neutralization chamber. A second fully automatic dosing device for adding flocculant is installed above the coagulation chamber. The device further includes a control system electrically connected to the first pH sensor, the first ORP sensor, the second pH sensor, the second ORP sensor, and the first fully automatic dosing device. The control system can adjust the output of the first fully automatic dosing device based on the detection data from the first pH sensor and the first ORP sensor.

[0007] As a further aspect of the present invention: the regulating storage device is provided with a filter chamber and a buffer chamber, a filter plate is detachably provided between the filter chamber and the buffer chamber, a material collection cage is detachably provided at the bottom of the filter chamber, a cover plate is detachably provided at the upper end of the filter chamber, the material collection cage can be lifted out from the upper end of the filter chamber, and the lower end of the buffer chamber is connected to the first fully automatic dosing device through a pipe.

[0008] As a further aspect of the present invention: a mixing and stirring assembly is provided inside the neutralization chamber and the coagulation chamber, and a drive mechanism for rotating the mixing and stirring assembly is provided above the neutralization chamber and the coagulation chamber.

[0009] As a further aspect of the present invention: a sedimentation collection mechanism is provided at the bottom of the flocculation chamber for collecting flocculent sediment.

[0010] As a further aspect of the present invention: the sedimentation collection mechanism includes a sedimentation chamber connected to the bottom of the flocculation chamber. A flow-blocking and penetrating plate is provided at the upper end of the sedimentation chamber. Multiple sets of longitudinally arranged through holes are provided on the flow-blocking and penetrating plate. The flocculent sediment falls into the through holes under the action of gravity. The through holes can reduce the influence of external water flow on the flocculent sediment, allowing the flocculent sediment to fall into the sedimentation chamber. A spiral conveying shaft is provided at the bottom of the sedimentation chamber, and a sewage pipe cooperating with the spiral conveying shaft is provided on one side of the sedimentation chamber.

[0011] As a further aspect of the present invention: the neutralization chamber is provided with a first inlet connected to the coagulation chamber on the side near the coagulation chamber, and the coagulation chamber is provided with a second inlet connected to the coagulation chamber on the side near the flocculation chamber.

[0012] As a further aspect of the present invention: the first infusion port is located at the upper end of the neutralization chamber, and the second infusion port is located at the lower end of the coagulation chamber.

[0013] As a further embodiment of the present invention: the driving mechanism includes a motor, the output end of the motor is fixedly provided with a drive gear, the neutralization chamber and the coagulation chamber are rotatably provided with a transmission shaft, each set of the transmission shafts is coaxially fixedly provided with at least one set of transmission gears, the transmission gears on adjacent sets of the transmission shafts are mutually cooperated with each other and a transmission belt for transmitting kinetic energy is provided, and the mixing and stirring assembly is coaxially fixedly connected to the corresponding transmission shaft.

[0014] As a further aspect of the present invention: the upper end of the flocculation chamber away from the coagulation chamber is connected to a storage chamber for storing water, and a water supply pipe is provided on one side of the storage chamber.

[0015] As a further aspect of the present invention: the coagulation chamber is equipped with a third pH sensor electrically connected to the control system.

[0016] The beneficial effects of this invention are: 1. In use, this invention utilizes sensors in the storage device to acquire raw wastewater data in real time. The control system predicts the alkali dosage in advance and employs an AI model for feedforward control to handle potential "shock loads." Sensors in the neutralization and coagulation chambers monitor key parameters in real time, allowing the control system to precisely adjust the dosage to ensure effective neutralization and flocculation. Before a shock load occurs, the control system adjusts the dosage in advance, ensuring that high-concentration wastewater and increased alkali solution arrive at the reaction zone simultaneously, achieving precise neutralization and avoiding drastic pH fluctuations. Simultaneously, the sedimentation and collection mechanism effectively collects flocculent precipitates, ensuring thorough separation and removal of harmful substances from the wastewater. This allows the device to adapt to different operating conditions, maintaining consistently high efficiency and stable treatment results, solving the treatment challenges caused by large concentration variations and flow fluctuations in lead smelting wastewater.

[0017] 2. Because the wastewater concentration varies greatly during lead smelting and discharge is intermittent with large flow fluctuations, a large influx of wastewater in a short period of time will shorten the hydraulic retention time of subsequent treatment units and reduce the treatment effect. The buffer chamber of this device can buffer this unstable incoming water, creating a stable and controllable neutralization environment for the subsequent treatment system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a lead metal smelting wastewater treatment device provided by the present invention; Figure 2 A schematic diagram of the longitudinal section structure of a lead metal smelting wastewater treatment device provided by the present invention; Figure 3 A schematic diagram of the regulating and storage device structure of a lead metal smelting wastewater treatment device provided by the present invention; Figure 4 This invention provides a schematic diagram of the drive mechanism of a lead metal smelting wastewater treatment device.

[0019] Explanation of reference numerals in the attached figures: 1. Adjustment and storage device; 101. Filter chamber; 102. Buffer chamber; 103. Filter plate; 104. First pH sensor; 105. First ORP sensor; 106. Collection cage; 2. Neutralization chamber; 201. Second pH sensor; 202. First inlet; 3. Coagulation chamber; 301. Third pH sensor; 302. Second ORP sensor; 303. Second inlet; 4. Flocculation chamber; 5. Storage chamber; 501. Water pipe; 6. Sedimentation collection mechanism; 601. Sedimentation chamber; 602. Screw conveyor shaft; 603. Flow-blocking plate; 604. Drainage pipe; 7. Drive mechanism; 701. Motor; 702. Drive shaft; 703. Drive gear; 704. Drive belt; 705. Drive gear; 8. Mixing and stirring assembly; 9. Flow limiting mechanism; 10. First fully automatic dosing device; 11. Second fully automatic dosing device. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 4 As shown in the figure, an embodiment of the present invention provides a lead smelting wastewater treatment device, including a regulating storage device 1 that acts as a buffer. A first pH sensor 104 and a first ORP (oxidation-reduction potential) sensor are disposed inside the regulating storage device 1. The device is also equipped with a control system electrically connected to both the first pH sensor 104 and the first ORP sensor 105. In the wastewater treatment process, the pH value of the untreated raw wastewater is measured here. Due to the characteristics of lead smelting wastewater, this value is usually extremely low, pH < 3. The first pH sensor 104 and the first ORP sensor 105 acquire this data in real time and quickly transmit it to the control system. After receiving this data, the control system can predict in advance the amount of alkali required to treat the wastewater. When a sharp drop in pH or an increase in influent flow is detected, it means that a "shock load" may occur subsequently. The control system can pre-command the first fully automatic dosing device 10 to increase the dosage to prepare for the situation, rather than waiting for the wastewater to enter the reaction zone and cause fluctuations before taking action. The ORP value of the influent, like the pH value, is an important indicator reflecting the "characteristics" of the wastewater. The AI ​​model of the control system can learn the dynamic relationship patterns between influent pH and ORP. For example, a specific pH drop accompanied by a specific ORP increase may indicate that wastewater from a particular workshop is entering the system. Once the AI ​​identifies this pattern, it can invoke a preset optimal control strategy to achieve more precise feedforward control than simply relying on pH values.

[0022] The device also includes a neutralization chamber 2 connected to the regulating storage device 1, a coagulation chamber 3 connected to the neutralization chamber 2, and a flocculation chamber 4 connected to the coagulation chamber 3. A second pH sensor 201 is installed in the neutralization chamber 2, where the alkali solution and wastewater are fully mixed and the main neutralization reaction is completed. The pH value at this point must be strictly controlled within the optimal precipitation pH range, typically 9.5-10.5. The control system uses the measured value at this point as the final basis for fine-tuning the dosage of the first fully automatic dosing device 10. A second ORP sensor 302 is installed in the coagulation chamber 3. Although lead precipitation does not directly depend on ORP, the ORP value in the water can reflect the presence of other oxidizing or reducing substances, such as residual chlorine and sulfites. These substances may affect the flocculation effect or indicate the pretreatment effect, so the installation of the second ORP sensor 302 helps to comprehensively understand various situations in the wastewater treatment process.

[0023] A second fully automatic dosing device 11 for adding flocculant is installed above the coagulation chamber 3. The second pH sensor 201, the second ORP sensor 302, and the second fully automatic dosing device 11 are all electrically connected to the control system. This allows the control system to accurately control the dosage of the second fully automatic dosing device 11 based on real-time data from the neutralization chamber 2 and the coagulation chamber 3, ensuring the flocculation effect.

[0024] When the flow meter on the inlet / outlet pipe detects an increase in water flow, or the pH sensor detects a sudden increase in acidity, these signals are immediately captured as "feedforward" signals. The control system doesn't wait for the wastewater to flow to the middle of the reaction tank and cause pH fluctuations before acting; instead, it anticipates the impending arrival of this "shock load." Before the shock load reaches the dosing point, the control system, via PLC, preemptively and slowly increases the frequency of the alkali dosing pump. When the high-concentration acidic wastewater and the increased alkali solution arrive at the reaction tank simultaneously, they can be neutralized precisely, thus avoiding drastic fluctuations in the pH curve and ensuring the stability of the reaction and the treatment effect.

[0025] The regulating storage device 1 is equipped with a filter chamber 101 and a buffer chamber 102, and a filter plate 103 is detachably installed between the filter chamber 101 and the buffer chamber 102. A collection cage 106 is detachably installed at the bottom of the filter chamber 101, and larger particles filtered by the filter plate 103 will fall into the collection cage 106 at the bottom. A cover plate is detachably installed at the top of the filter chamber 101, and the collection cage 106 can be lifted from the top of the filter chamber 101, thereby carrying the filtered particles out of the filter chamber 101. The lower end of the buffer chamber 102 is connected to the first fully automatic dosing device 10 through a pipe. Wastewater passing through the buffer chamber 102 will enter the first fully automatic dosing device 10 through the pipe, be mixed with neutralizing liquid, and then enter the neutralization chamber 2.

[0026] In lead smelting, the concentration of wastewater discharged varies greatly across different stages and at different times. Furthermore, wastewater discharge is intermittent, with significant flow fluctuations. A large influx of wastewater in a short period shortens the hydraulic retention time of subsequent treatment units, causing the wastewater to be lost before it can fully react, resulting in a sharp decline in treatment efficiency. The purpose of the buffer chamber 102 is to address the instability of the incoming water, creating a stable and controllable neutralization environment for the subsequent treatment system, ensuring the smooth operation of the subsequent treatment process. The buffer chamber 102 is at a suitable horizontal height, ideally allowing the wastewater within it to be forced into the neutralization chamber 2 under its own gravity, with the flow rate controlled by a throttling valve, eliminating the need for a separate drive pump.

[0027] In one specific embodiment, a sedimentation collection mechanism 6 is provided at the bottom of the flocculation chamber 4 for collecting flocculent sediment. The sedimentation collection mechanism 6 includes a sedimentation chamber 601 connected to the bottom of the flocculation chamber 4. A flow-blocking and penetrating plate 603 is provided at the upper end of the sedimentation chamber 601. The flow-blocking and penetrating plate 603 has multiple sets of longitudinally arranged through holes, such as... Figure 2 As shown, the flocculent precipitate falls into the through-hole under gravity. The through-hole reduces the impact of external water flow on the flocculent precipitate, allowing it to fall smoothly into the sedimentation chamber 601. A spiral conveyor shaft 602 is installed at the bottom of the sedimentation chamber 601. A drive device rotates the spiral conveyor shaft 602, thereby discharging the flocculent precipitate from the drain pipe on one side, achieving effective collection and treatment of the flocculent precipitate.

[0028] A first inlet 202, connected to the coagulation chamber 3, is located on the side of the neutralization chamber 2 near the coagulation chamber 3, at the upper end of the neutralization chamber 2. A second inlet 303, connected to the coagulation chamber 3, is located on the side of the coagulation chamber 3 near the flocculation chamber 4, at the lower end of the coagulation chamber 3. Wastewater rises from the bottom of the neutralization chamber 2 to the upper end and enters the coagulation chamber 3. At this time, the second fully automatic dosing device 11 continuously delivers flocculant, causing the colloidal particles in the wastewater to aggregate and precipitate, forming flocs. Under the action of gravity, these flocs move down to the second inlet 303 and enter the flocculation chamber 4. Then, under the action of gravity, the flocs enter the sedimentation chamber 601 to complete the sedimentation operation, achieving the separation and removal of harmful substances in the wastewater. Flow limiting mechanisms can also be installed on the first inlet 202 and the second inlet 303 to control the flow rate, allowing for timely suspension of the output on the other side when treatment is insufficient.

[0029] The neutralization chamber 2 and the coagulation chamber 3 are equipped with a mixing and stirring assembly 8, which consists of a stirring shaft and stirring blades, such as... Figure 2As shown, a drive mechanism 7 for rotating the mixing and stirring assembly 8 is provided above the neutralization chamber 2 and the coagulation chamber 3. The drive mechanism 7 includes a motor 701, with a drive gear 705 fixedly installed at the output end of the motor 701. A transmission shaft 702 is rotatably installed on both the neutralization chamber 2 and the coagulation chamber 3. At least one set of transmission gears 703 is coaxially fixedly installed on each set of transmission shafts 702. A transmission belt 704 for transmitting kinetic energy is provided on the transmission gears 703 of two adjacent sets of transmission shafts 702. The mixing and stirring assembly 8 is coaxially fixedly connected to the corresponding transmission shaft 702. In use, the motor 701 drives the drive gear 705 to rotate, which in turn drives a set of transmission gears 703 to rotate. These transmission gears 703 drive the connected transmission shaft 702, which in turn drives another set of connected transmission gears 703 to rotate. These transmission gears 703 drive the transmission belt 704 to move, which in turn drives the transmission gears 703 on another set of transmission shafts 702 to rotate. This process continues, allowing all transmission shafts 702 to rotate, thereby driving the mixing and stirring assembly 8 to fully stir the wastewater in the neutralization chamber 2 and the coagulation chamber 3, promoting the reaction.

[0030] The upper end of the flocculation chamber 4, away from the coagulation chamber 3, is connected to a storage chamber 5 for storing water. A water supply pipe 501 is installed on one side of the storage chamber 5. The flocculent matter floating in the wastewater in the flocculation chamber 4 will fall into the sedimentation chamber 601 under the action of gravity, while the treated water will enter the storage chamber 5 from above the flocculation chamber 4. The water inside the storage chamber 5 will be pumped out through the water supply pipe 501 at the bottom of the storage chamber 5, realizing the collection and output of the treated water.

[0031] The implementation of this control system relies on an advanced process control strategy that combines Model Predictive Control (MPC) with feedforward-feedback composite control. First, a sensing network and digital twin are established. Multiple pH and ORP sensors are deployed at key nodes such as the inlet, neutralization chamber 2, and coagulation chamber 3, forming a real-time data acquisition network. This data is continuously uploaded to a cloud platform to train and drive a digital twin model of this specific wastewater treatment system. The Long Short-Term Memory (LSTM) machine learning algorithm is used to learn the complex nonlinear relationship between dynamic changes in influent water quality and subsequent treatment effects from massive amounts of historical data, thus enabling predictive capabilities. Through learning and analyzing large amounts of historical data, the system can better understand the changing patterns of wastewater quality, providing a basis for subsequent precise control.

[0032] Secondly, the system monitors the fluctuation trends of feedforward signals such as pH and ORP at the inlet in real time. Once a change is detected, this real-time data is immediately input into a digital twin model for rapid simulation, predicting the trajectory of water quality parameters within the next 5-10 minutes. If the prediction indicates that the pH will deviate from the target range, the optimization algorithm will immediately calculate an optimal adjustment plan, determining how much and by what magnitude the dosing pump frequency needs to be adjusted in advance. This rolling optimization and prediction approach enables timely adjustments to the control strategy based on real-time data, ensuring the stability and accuracy of the treatment process.

[0033] Finally, before the predicted shock load actually affects the core reaction zone, the system sends a command to the dosing pump to adjust the dosage of the first fully automatic dosing device 10. When the high-concentration wastewater arrives at the reaction zone, the increased dosage is already in place, thus achieving precise neutralization and nipping pH fluctuations in the bud.

[0034] The coagulation chamber 3 is equipped with a third pH sensor 301 electrically connected to the control system. This pH sensor is used to ultimately verify whether the effluent meets the standards. It does not participate in the core reaction control, but provides key data for system performance evaluation and compliance reporting. If the pH exceeds the standard, an alarm will be triggered so that timely measures can be taken to ensure that the treated wastewater meets the discharge standards.

[0035] Working principle: Wastewater enters the regulating storage device 1. The first pH sensor 104 and the first ORP sensor 105 acquire the raw wastewater's pH and ORP data in real time and transmit them to the control system. Based on this, the control system predicts the amount of alkali required to treat the wastewater and can also learn the dynamic relationship between the two through an AI model to achieve feedforward control. The wastewater enters the neutralization chamber 2 and mixes with the alkali solution added by the first fully automatic dosing device 10 to carry out a neutralization reaction. The second pH sensor 201 monitors this in real time, and the control system uses this information to finely adjust the dosage of the alkali solution to ensure that the pH is within the optimal precipitation range.

[0036] The neutralized wastewater enters coagulation chamber 3, where a second fully automatic dosing device 11 adds flocculant. A second ORP sensor 302 monitors the ORP value to aid in monitoring the situation, and a third pH sensor 301 ultimately verifies whether the effluent pH meets the standard. The control system precisely controls the dosage based on data from neutralization chamber 2 and coagulation chamber 3. Wastewater then enters flocculation chamber 4 from coagulation chamber 3. Under gravity, the flocculent precipitate falls through the flow-blocking plate 603 into sedimentation chamber 601, where a spiral conveyor shaft 602 at the bottom discharges the precipitate. The treated water enters storage chamber 5 from above flocculation chamber 4 and is output through water pipe 501.

[0037] The control system employs a combined model predictive control and feedforward-feedback control strategy. First, a sensing network and digital twin are established, and the LSTM algorithm is used to learn the patterns of water quality changes. Real-time monitoring of feedforward signal fluctuations is then input into the model for prediction, calculating the optimal adjustment scheme. Finally, commands are sent to the dosing pump in advance to achieve precise neutralization.

[0038] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A wastewater treatment device for lead metal smelting, characterized in that, It includes a regulating storage device (1) that acts as a buffer, and a first pH sensor (104) and a first ORP sensor (105) are provided inside the regulating storage device (1); The device also includes a neutralization chamber (2) connected to the regulating storage device (1), a coagulation chamber (3) connected to the neutralization chamber (2), and a flocculation chamber (4) connected to the coagulation chamber (3). A second pH sensor (201) is installed in the neutralization chamber (2), and a second ORP sensor (302) is installed in the coagulation chamber (3). A first fully automatic dosing device (10) for adjusting the pH value of wastewater is provided between the regulating storage device (1) and the neutralization chamber (2). A second fully automatic dosing device (11) for adding flocculant is provided above the coagulation chamber (3). The device also includes a control system electrically connected to the first pH sensor (104), the first ORP sensor (105), the second pH sensor (201), the second ORP sensor (302), and the first fully automatic dosing device (10). The control system can adjust the output of the first fully automatic dosing device (10) according to the detection data of the first pH sensor (104) and the first ORP sensor (105).

2. The lead metal smelting wastewater treatment device as described in claim 1, characterized in that, The regulating storage device (1) is provided with a filter chamber (101) and a buffer chamber (102). A filter plate (103) is detachably provided between the filter chamber (101) and the buffer chamber (102). A material collection cage (106) is detachably provided at the bottom of the filter chamber (101). A cover plate is detachably provided at the top of the filter chamber (101). The material collection cage (106) can be lifted out from the top of the filter chamber (101). The lower end of the buffer chamber (102) is connected to the first fully automatic dosing device (10) through a pipe.

3. The lead metal smelting wastewater treatment device as described in claim 2, characterized in that, The neutralization chamber (2) and the coagulation chamber (3) are equipped with a mixing and stirring assembly (8), and a drive mechanism (7) for rotating the mixing and stirring assembly (8) is provided above the neutralization chamber (2) and the coagulation chamber (3).

4. The lead metal smelting wastewater treatment device as described in claim 3, characterized in that, The bottom of the flocculation chamber (4) is provided with a sedimentation collection mechanism (6) for collecting flocculent sediment.

5. The lead metal smelting wastewater treatment device as described in claim 4, characterized in that, The sedimentation collection mechanism (6) includes a sedimentation chamber (601) connected to the bottom of the flocculation chamber (4). A flow-blocking through plate (603) is provided at the upper end of the sedimentation chamber (601). Multiple sets of longitudinally arranged through holes are provided on the flow-blocking through plate (603). The flocculent sediment falls into the through holes under the action of gravity. The through holes can reduce the influence of external water flow on the flocculent sediment, so that the flocculent sediment falls into the sedimentation chamber (601). A spiral conveying shaft (602) is provided at the bottom of the sedimentation chamber (601). A sewage pipe (604) that cooperates with the spiral conveying shaft (602) is provided on one side of the sedimentation chamber (601).

6. The lead metal smelting wastewater treatment device as described in claim 1, characterized in that, The neutralization chamber (2) is provided with a first inlet (202) connected to the coagulation chamber (3) on the side near the coagulation chamber (3), and the coagulation chamber (3) is provided with a second inlet (303) connected to the coagulation chamber (3) on the side near the flocculation chamber (4).

7. The lead metal smelting wastewater treatment device as described in claim 6, characterized in that, The first infusion port (202) is located at the upper end of the neutralization chamber (2), and the second infusion port (303) is located at the lower end of the coagulation chamber (3).

8. The lead metal smelting wastewater treatment device as described in claim 3, characterized in that, The drive mechanism (7) includes a motor (701), and a drive gear (705) is fixedly installed at the output end of the motor (701). A drive shaft (702) is rotatably installed on the neutralization chamber (2) and the coagulation chamber (3). At least one set of drive gears (703) is coaxially fixedly installed on each set of drive shafts (702). A drive belt (704) for transmitting kinetic energy is installed on the drive gears (703) on two adjacent sets of drive shafts (702). The mixing and stirring assembly (8) is coaxially fixedly connected to the corresponding drive shaft (702).

9. The lead metal smelting wastewater treatment device as described in claim 8, characterized in that, The upper end of the flocculation chamber (4) away from the coagulation chamber (3) is connected to a storage chamber (5) for storing water, and a water supply pipe (501) is provided on one side of the storage chamber (5).

10. The wastewater treatment device for lead metal smelting as described in claim 1, characterized in that, The coagulation chamber (3) is equipped with a third pH sensor (301) that is electrically connected to the control system.

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