A device and method for quantitative monitoring and treatment of battery production wastewater

Abstract

The present invention discloses a quantitative monitoring and treatment device and method for battery production wastewater, and relates to the technical field of battery production waste liquid treatment. In the present invention: a first distance sensor module for monitoring the liquid level is arranged above the clean liquid area, a main liquid suction pipe is located outside the wastewater sedimentation tank and is sequentially provided with a pH monitoring mechanism and a first liquid pump, a reaction tank is arranged on the downstream side of the wastewater sedimentation tank, a plurality of vertically distributed shunt chambers are arranged inside the reaction tank, and a neutralization tank is arranged on the downstream side of the reaction tank. The present invention injects the acid liquid of the main liquid suction pipe into the shunt chamber, performs corresponding current limiting control on the shunt chamber with excessive liquid level, and simultaneously injects an appropriate amount of alkali liquid for neutralization, and timely and efficiently discharges the liquid components that meet the neutralization reaction into the subsequent neutralization tank by detecting the pH value of the liquid in the upper part of the shunt chamber, thereby realizing the continuous injection of upstream lead-containing acidic waste liquid, and also realizing the efficient neutralization reaction treatment process, and ensuring the efficiency of the subsequent treatment process after neutralization.

Description

Technical Field

[0001] The invention relates to the technical field of battery production waste liquid treatment, and in particular to a device and method for quantitative monitoring and treatment of battery production waste water. Background Art

[0002] During the production process of lead-acid batteries, wastewater containing sulfuric acid and lead is discharged from each workshop. After being collected through a special sewage pipe, it passes through a screen (to filter out large debris) and most of the debris particles in the wastewater are precipitated in the sedimentation tank. This is because when lead reacts with dilute sulfuric acid, a white precipitate (lead sulfate) is generated.

[0003] The above-mentioned acidic waste liquid is generally treated through acid-base neutralization. After preliminary filtration and precipitation, alkali solution or other alkaline substances are added to neutralize the acidic waste liquid in the sedimentation tank. After meeting the standards, it is discharged to the next treatment process.

[0004] The traditional neutralization treatment method puts alkaline substances into a large amount of acidic waste liquid. It is necessary to wait until the acidic waste liquid is completely neutralized or the pH value basically reaches the standard before it can be discharged to the next treatment process. This not only affects the continuous injection of upstream lead-containing acidic waste liquid, but also affects the treatment efficiency of the next treatment process after neutralization.

[0005] In summary, how to achieve continuous injection of upstream lead-containing acidic waste liquid, realize timely and efficient neutralization reaction treatment process, and ensure the efficiency of subsequent post-neutralization treatment process has become a problem that needs to be solved. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a device and method for quantitative monitoring and treatment of battery production wastewater, thereby realizing continuous injection of upstream lead-acid waste liquid and timely and efficient neutralization reaction treatment process, thereby ensuring the efficiency of subsequent post-neutralization treatment process.

[0007] The present invention is achieved through the following technical solutions:

[0008] The invention provides a quantitative monitoring and treatment device for battery production wastewater, comprising a wastewater sedimentation tank, wherein the wastewater sedimentation tank is provided with a grid filter plate, a sedimentation area located on one side of the grid filter plate, and a clean liquid area located on the other side of the grid filter plate, the wastewater sedimentation tank is provided with a liquid injection pipe inserted into the sedimentation area, and a slag outlet communicated with the bottom of the sedimentation area, the wastewater sedimentation tank is provided with a main liquid suction pipe inserted into the clean liquid area, the main liquid suction pipe is horizontally connected with a plurality of liquid suction branch pipes, each liquid suction branch pipe is independently provided with a liquid suction electric control valve, the clean liquid area is provided with a plurality of turbidity sensor probes, the turbidity sensor probes are aligned with the opening positions of the liquid suction branch pipes one by one, a first distance sensor module for monitoring the liquid level is provided above the clean liquid area, and a pipeline of the main liquid suction pipe located outside the wastewater sedimentation tank is provided with a pH monitoring mechanism and a first liquid pump in sequence.

[0009] A reaction tank is arranged on the downstream side of the wastewater sedimentation tank, and a plurality of vertically distributed diversion chambers are arranged inside the reaction tank. The liquid outlet of the first liquid pump is connected to a plurality of independent acid injection branches, and each acid injection branch is independently connected to the bottom of a diversion chamber. Each acid injection branch is arranged with a first injection electric-controlled valve, and each acid injection branch is connected to an alkali injection branch, and each alkali injection branch is independently arranged with a second injection electric-controlled valve.

[0010] A fixed support tube and a second distance sensor module are fixedly arranged on the upper side of each shunt chamber, a movable connecting tube is movably arranged on the fixed support tube, a floating ring is arranged at the lower part of the movable connecting tube, and a pH sensor is fixedly installed on the bottom side of the floating ring.

[0011] A neutralization tank is arranged on the downstream side of the reaction tank, each fixed support pipe is connected to an external branch pipe, each external branch pipe is independently equipped with an external output electric control valve, all external branch pipes are commonly connected to a neutralization liquid discharge pipe, and the neutralization liquid discharge pipe is connected to a third liquid pump that discharges liquid into the neutralization tank.

[0012] As a preferred technical solution of the treatment device of the present invention: a lead slag landslide is arranged at the bottom of the clean liquid area, and a discharge notch matching the bottom side of the lead slag landslide is opened at the bottom of the grid filter plate.

[0013] As a preferred technical solution of the treatment device of the present invention: a first main output pipe is installed at the liquid outlet end of the first liquid pump, a plurality of acid injection branches are connected in parallel to the first main output pipe, all alkali injection branches are commonly connected to a second main output pipe, the second main output pipe is equipped with a second liquid pump, and an alkali supply device is arranged upstream of the second liquid pump.

[0014] As a preferred technical solution of the processing device of the present invention: a piston ring is fixedly installed on the outer periphery of the upper side end of the movable connecting pipe, and the piston ring is movably installed inside the fixed support tube, and the piston ring is in sliding and extruding contact with the inner wall of the fixed support tube.

[0015] As a preferred technical solution of the treatment device of the present invention: the bottom side of the movable connecting pipe is a suction port, and the bottom side surface of the floating ring is higher than the suction port.

[0016] As a preferred technical solution of the treatment device of the present invention: a balancing weight for balancing the weight distribution of the pH sensor is also configured on the bottom side of the floating ring.

[0017] As a preferred technical solution of the treatment device of the present invention: the liquid outlet of the third liquid pump is connected to the neutralization liquid introduction pipe, and the neutralization liquid introduction pipe is inserted into the neutralization tank.

[0018] The present invention provides a method for quantitative monitoring and treatment of battery production wastewater, comprising the following contents:

[0019] S1. The lead-containing waste liquid of the battery is injected into the wastewater sedimentation tank through the injection pipe. After the lead-containing waste liquid is filtered through the grid filter plate, the waste liquid with low lead content enters the clean liquid area.

[0020] S2. The first distance sensing module monitors the liquid level of the clean liquid area, and the turbidity sensing probes below the liquid level monitor the turbidity of the liquid at their respective horizontal positions.

[0021] S2.1. The suction branches above the liquid level are closed.

[0022] S2.2. When the turbidity of the liquid exceeds the standard, the suction branch aligned with the turbidity sensor probe is closed.

[0023] S2.3. When the turbidity sensor probe that monitors the liquid turbidity does not exceed the standard is aligned with the liquid suction branch, open it.

[0024] S3. The first liquid pump is started, and the liquid sucked by the multiple liquid suction branches enters the main liquid suction pipe. The pH monitoring mechanism detects the pH of the liquid, and the liquid is injected into the diversion chamber at the corresponding position through the acid injection branch.

[0025] S4. According to the liquid pH parameter detected by the pH monitoring mechanism, the alkali solution injection branch pipe injects alkali solution into the opened acid solution injection branch pipe at an appropriate rate.

[0026] S5. The second distance sensing modules detect the liquid level in the respective diversion chambers, and the pH sensors detect the pH of the upper liquid in the respective diversion chambers.

[0027] S5.1. When the second distance sensing module detects that the liquid level in the diversion chamber is too high, the acid injection branch connected to the diversion chamber is closed, and the acid injection branch connected to the diversion chamber is opened again until the second distance sensing module detects that the liquid level in the diversion chamber is not too high.

[0028] S5.2. The pH sensor detects that the pH of the upper liquid in the diversion chamber reaches the neutralization reaction standard, the third liquid pump is started, the external branch pipe just above the diversion chamber is opened, and the upper liquid in the diversion chamber is introduced into the neutralization tank through the movable connecting pipe, the fixed support pipe, the external branch pipe, and the third liquid pump.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention first performs preliminary filtration on lead slag, lead sulfate and other precipitates in the lead-containing acid liquid through a grid filter plate, and the filtered acidic liquid enters the clean liquid area, and the liquid turbidity of each liquid level layer is detected through a vertically distributed turbidity sensor probe, and the liquid that meets the standard is sucked into the main liquid suction pipe, and the pH test is performed; by configuring a plurality of shunt chambers in the reaction tank, the acid liquid of the main liquid suction pipe is injected into the shunt chamber, and the shunt chamber with an excessive liquid level is subjected to corresponding current limiting control through a second distance sensor module, and a proper amount of alkali liquid is simultaneously injected for neutralization, and by detecting the pH value of the liquid in the upper part of the shunt chamber, the liquid component that meets the neutralization reaction is discharged to the subsequent neutralization tank in a timely and efficient manner, thereby realizing the continuous injection of the upstream lead-containing acidic waste liquid, and realizing the timely and efficient neutralization reaction treatment process, and ensuring the efficiency of the subsequent treatment process after neutralization. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The overall schematic diagram of the wastewater quantitative monitoring and treatment device in the present invention is Figure 1 .

[0032] Figure 2 The overall schematic diagram of the wastewater quantitative monitoring and treatment device in the present invention is Figure 2 .

[0033] Figure 3 for Figure 2 Schematic diagram of the partial enlargement of point A in the middle.

[0034] Figure 4 for Figure 2 Schematic diagram of the partial enlargement of point B in the middle.

[0035] Figure 5 for Figure 2 Schematic diagram of the partial enlargement of point C in the middle.

[0036] Among them: 1-wastewater sedimentation tank, 101-grid filter plate, 1011-discharge gap, 102-sedimentation area, 103-clean liquid area, 104-liquid injection pipe, 105-lead slag landslide, 106-slag outlet, 107-fixed support rod, 108-turbidity sensor probe, 109-main liquid suction pipe, 110-liquid suction branch pipe, 111-liquid suction electric control valve, 112-pH monitoring mechanism, 113-first distance sensor module; 2-reaction tank, 201-diversion chamber, 202-fixed support pipe, 203-movable connecting pipe, 2031-suction Inlet port, 204-floating ring, 205-pH sensor, 206-balance weight, 207-piston ring, 208-second distance sensor module; 3-neutralization tank; 4-first liquid pump; 5-first main output pipe, 501-acid injection branch pipe, 502-first injection electric control valve; 6-second main output pipe, 601-alkali injection branch pipe, 602-second injection electric control valve; 7-second liquid pump; 8-neutralization liquid discharge pipe, 801-external branch pipe, 802-external output electric control valve; 9-third liquid pump; 10-neutralization liquid inlet pipe. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] Embodiment 1: The present invention designs a quantitative monitoring and treatment device for battery production wastewater, and the specific structure is as follows:

[0039] See also Figure 1 The wastewater sedimentation tank 1 is provided with a grid filter plate 101, a sedimentation area 102, and a clean liquid area 103. The sedimentation area 102 is located on one side of the grid filter plate 101, and the clean liquid area 103 is located on the other side of the grid filter plate 101. The wastewater sedimentation tank 1 is provided with a liquid injection pipe 104 inserted into the sedimentation area 102. A slag outlet 106 is also provided at the bottom of the wastewater sedimentation tank 1. The slag outlet 106 is communicated with the bottom of the sedimentation area 102. A lead slag landslide 105 is provided at the bottom of the clean liquid area 103. A discharge notch 1011 matching the bottom side of the lead slag landslide 105 is provided at the bottom of the grid filter plate 101. A small amount of sediment sunk in the clean liquid area 103 can be discharged through the lead slag landslide 105 and the discharge notch 1011.

[0040] See also Figure 2 , Figure 3The main liquid suction pipe 109 is inserted into the clean liquid area 103 of the wastewater sedimentation tank 1. The main liquid suction pipe 109 of the clean liquid area 103 is horizontally connected with multiple liquid suction branches 110. Each liquid suction branch 110 is independently configured with a liquid suction electric control valve 111. Multiple turbidity sensor probes 108 are distributed in the clean liquid area 103 along the vertical direction. One turbidity sensor probe 108 is aligned with the opening position of one liquid suction branch 110. A first distance sensor module 113 is installed above the clean liquid area 103. The first distance sensor module 113 is used to monitor the liquid level. The pipeline of the main liquid suction pipe 109 located outside the wastewater sedimentation tank 1 is sequentially configured with a pH monitoring mechanism 112 and a first liquid pump 4.

[0041] See also Figure 2 , Figure 4 The reaction tank 2 is located downstream of the wastewater sedimentation tank 1 , and a plurality of vertically distributed diversion chambers 201 are arranged inside the reaction tank 2 .

[0042] The end of the main liquid suction pipe 109 is connected to the liquid inlet end of the first liquid pump 4, the first main output pipe 5 is connected to the liquid outlet end of the first liquid pump 4, and the main output pipe 5 is also connected to a plurality of acid injection branches 501 distributed in parallel.

[0043] The bottom of each diversion chamber 201 is connected to an acid injection branch pipe 501, and each acid injection branch pipe 501 is equipped with a first injection electric control valve 502. The second main output pipe 6 is equipped with a second liquid pump 7, and an alkali solution supply device is arranged upstream of the second liquid pump 7. The second main output pipe 6 is connected to multiple alkali solution injection branches 601, and each alkali solution injection branch pipe 601 is independently equipped with a second injection electric control valve 602. One acid injection branch pipe 501 is connected to one alkali solution injection branch pipe 601.

[0044] See also Figure 2 , Figure 5 The fixed support tube 202 and the second distance sensor module 208 are fixedly installed on the upper side of the diversion chamber 201, the upper side end of the movable connecting tube 203 extends into the fixed support tube 202, and the piston ring 207 is fixedly installed on the outer periphery of the upper side end of the movable connecting tube 203, and the piston ring 207 is in sliding and extrusion contact with the inner wall of the fixed support tube 202.

[0045] A floating ring 204 is disposed at the lower part of the movable connecting pipe 203 . When the floating ring 204 rises and falls synchronously with the liquid level, the piston ring 207 also slides and rises and falls in the fixed support pipe 202 . The suction port 2031 of the movable connecting pipe 203 is lower than the bottom side of the floating ring 204 .

[0046] The pH sensor 205 is fixedly installed on the bottom side of the floating ring 204. A balancing weight 206 is also installed on the bottom side of the floating ring 204. The balancing weight 206 is used to balance the weight distribution of the pH sensor 205, so that the floating ring 204 is evenly stressed when floating, and the movable connecting tube 203 and the piston ring 207 can slide and rise and fall more smoothly in the fixed support tube 202.

[0047] The neutralization tank 3 is located downstream of the reaction tank 2, the neutralization liquid inlet pipe 10 is inserted into the neutralization tank 3, the neutralization liquid inlet pipe 10 is connected to the liquid outlet end of the third liquid pump 9, the neutralization liquid discharge pipe 8 is connected to the liquid inlet end of the third liquid pump 9, and the upstream side of the neutralization liquid discharge pipe 8 is connected to multiple external branch pipes 801, each external branch pipe 801 is independently configured with an external output electric control valve 802, and each external branch pipe 801 is connected to a fixed support pipe 202.

[0048] Embodiment 2: The present invention designs a method for quantitative monitoring and treatment of battery production wastewater, and the specific method is as follows:

[0049] First, the lead-containing waste liquid of the battery is injected into the wastewater sedimentation tank 1 through the injection pipe 104 . After the lead-containing waste liquid is filtered through the grid filter plate 101 , the waste liquid with low lead content enters the clean liquid area 103 .

[0050] Then, the first distance sensing module 113 monitors the liquid level of the clean liquid area 103, and the turbidity sensing probes 108 located below the liquid level monitor the turbidity of the liquid at their respective horizontal positions;

[0051] State 1: The suction branch pipe 110 is above the liquid level, and its suction electric control valve 111 is closed. The suction branch pipe 110 at this position does not suck liquid.

[0052] State 2: The liquid suction branch pipe 110 aligned with the turbidity sensor probe 108 that detects that the liquid turbidity exceeds the standard has its liquid suction electric control valve 111 closed, and the liquid suction branch pipe 110 at this position does not perform liquid suction.

[0053] State three: the liquid suction branch pipe 110 is aligned with the turbidity sensor probe 108 which monitors that the liquid turbidity does not exceed the standard, and its liquid suction electric control valve 111 is opened, and the liquid suction branch pipe 110 at this position starts to suck liquid.

[0054] Then, the first liquid pump 4 is started, and the liquid sucked by the multiple liquid suction branches 110 enters the main liquid suction pipe 109 . The pH monitoring mechanism 112 detects the pH of the liquid, and the liquid is injected into the diversion chamber 201 at the corresponding position through the acid injection branch 501 .

[0055] At the same time, according to the liquid pH parameter detected by the pH monitoring mechanism 112, the alkali solution injection arm 601 performs the alkali solution injection operation of appropriate speed to the acid solution injection arm 501 that has been opened. The alkali solution injection rate can be controlled by the second injection electric control valve 602. For example, when the pH monitoring mechanism 112 detects that the pH value of the waste liquid is relatively small, the second injection electric control valve 602 that injects the alkali solution is opened to a greater extent. When the pH monitoring mechanism 112 detects that the pH value of the waste liquid is relatively large, the second injection electric control valve 602 that injects the alkali solution is opened to a lesser extent. The specific rate also needs to be determined according to the relevant parameters such as the acid solution rate, the alkali solution pH value and the neutralization reaction ratio, which can be realized by conventional specific neutralization reaction calculations, and will not be repeated in the present invention.

[0056] Then, the second distance sensing modules 208 detect the liquid level in the respective diversion chambers 201 , and the pH sensors 205 detect the pH of the upper liquid in the respective diversion chambers 201 .

[0057] Scenario 1: When the second distance sensor module 208 detects that the liquid level in the diverter chamber 201 is too high, the acid injection branch pipe 501 connected to the diverter chamber 201 is closed, and the acid injection branch pipe 501 connected to the diverter chamber 201 is opened again when the second distance sensor module 208 detects that the liquid level in the diverter chamber 201 is not too high.

[0058] Scenario 2: The pH sensor 205 detects that the pH of the upper layer of the liquid in the diversion chamber 201 reaches the neutralization reaction standard, the third liquid pump 9 is started, the external connecting branch pipe 801 directly above the diversion chamber 201 is opened, and the upper layer of the liquid in the diversion chamber 201 is introduced into the neutralization tank 3 through the movable connecting pipe 203, the fixed support pipe 202, the external connecting branch pipe 801, and the third liquid pump 9. The alkali liquid enters the connected acid injection branch pipe 501 through the alkali liquid injection branch pipe 601, and enters the bottom of the diversion chamber 201. The acid waste liquid reacts with the alkali liquid. The higher the position of the liquid in the diversion chamber 201, the more thorough the neutralization reaction. Detecting the pH of the upper layer of the liquid in the diversion chamber 201 is an important indicator for quickly and efficiently discharging the neutralized liquid that meets the standard.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A quantitative monitoring and treatment device for battery production wastewater, comprising a wastewater sedimentation tank (1), the wastewater sedimentation tank (1) being provided with a grid filter plate (101), a sedimentation area (102) located on one side of the grid filter plate (101), and a clean liquid area (103) located on the other side of the grid filter plate (101), the wastewater sedimentation tank (1) being provided with a liquid injection pipe (104) inserted into the sedimentation area (102), and a slag outlet (106) connected to the bottom of the sedimentation area (102), characterized in that: The wastewater sedimentation tank (1) is provided with a main liquid suction pipe (109) inserted into a liquid purification zone (103); the main liquid suction pipe (109) is horizontally connected to a plurality of liquid suction branch pipes (110); each liquid suction branch pipe (110) is independently provided with a liquid suction electric control valve (111); the liquid purification zone (103) is provided with a plurality of turbidity sensor probes (108); the turbidity sensor probes (108) are aligned with the opening positions of the liquid suction branch pipes (110) one by one; a first distance sensor module (113) for monitoring the liquid level is provided above the liquid purification zone (103); and a pipeline of the main liquid suction pipe (109) located outside the wastewater sedimentation tank (1) is provided with a pH monitoring mechanism (112) and a first liquid pump (4) in sequence; A reaction tank (2) is arranged at the downstream side of the wastewater sedimentation tank (1), wherein a plurality of vertically distributed diversion chambers (201) are arranged inside the reaction tank (2), the liquid outlet of the first liquid pump (4) is connected to a plurality of independent acid injection branch pipes (501), each acid injection branch pipe (501) is independently connected to the bottom of a diversion chamber (201), each acid injection branch pipe (501) is arranged with a first injection electric control valve (502), each acid injection branch pipe (501) is connected to an alkali injection branch pipe (601), and each alkali injection branch pipe (601) is independently arranged with a second injection electric control valve (602); A fixed support tube (202) and a second distance sensor module (208) are fixedly arranged on the upper side of each flow distribution chamber (201); the fixed support tube (202) is movably arranged with a movable connecting tube (203); a floating ring (204) is arranged at the lower part of the movable connecting tube (203); and a pH sensor (205) is fixedly installed on the bottom side of the floating ring (204); A neutralization tank (3) is arranged at the downstream side of the reaction tank (2); each fixed support pipe (202) is connected to an external branch pipe (801); each external branch pipe (801) is independently equipped with an external output electric control valve (802); all external branch pipes (801) are connected to a neutralization liquid discharge pipe (8); and the neutralization liquid discharge pipe (8) is connected to a third liquid pump (9) for discharging liquid from the neutralization tank (3).

2. The device for quantitative monitoring and treatment of battery production wastewater according to claim 1 is characterized in that: A lead slag landslide (105) is provided at the bottom of the clean liquid area (103), and a discharge notch (1011) matching the bottom side of the lead slag landslide (105) is provided at the bottom of the grid filter plate (101).

3. The device for quantitative monitoring and treatment of battery production wastewater according to claim 1 is characterized in that: A first main output pipe (5) is installed at the liquid outlet end of the first liquid pump (4); a plurality of acid injection branch pipes (501) are connected in parallel to the first main output pipe (5); all alkali injection branch pipes (601) are connected in common to a second main output pipe (6); a second liquid pump (7) is provided on the second main output pipe (6); and an alkali supply device is provided upstream of the second liquid pump (7).

4. The device for quantitative monitoring and treatment of battery production wastewater according to claim 1 is characterized in that: A piston ring (207) is fixedly mounted on the outer periphery of the upper side end of the movable connecting tube (203); the piston ring (207) is movably mounted inside the fixed support tube (202); the piston ring (207) is in sliding and extrusion contact with the inner wall of the fixed support tube (202).

5. The device for quantitative monitoring and treatment of battery production wastewater according to claim 1 is characterized in that: The bottom side of the movable connecting pipe (203) is a suction port (2031), and the bottom side surface of the floating ring (204) is higher than the suction port (2031).

6. The device for quantitative monitoring and treatment of battery production wastewater according to claim 1 is characterized in that: The bottom side of the floating ring (204) is also provided with a balancing weight (206) for balancing the weight distribution of the pH sensor (205).

7. The device for quantitative monitoring and treatment of battery production wastewater according to claim 1 is characterized in that: The liquid outlet end of the third liquid pump (9) is connected to a neutralization liquid introduction pipe (10), and the neutralization liquid introduction pipe (10) is inserted into the neutralization tank (3).

8. A method for quantitative monitoring and treatment of battery production wastewater, characterized in that: A battery production wastewater quantitative monitoring and treatment device according to any one of claims 1 to 7, comprising the following contents: S1. The lead-containing waste liquid of the battery is injected into the wastewater sedimentation tank (1) through the injection pipe (104). After the lead-containing waste liquid is filtered through the grid filter plate (101), the waste liquid with low lead content enters the clean liquid area (103); S2. The first distance sensing module (113) monitors the liquid level of the clean liquid area (103), and the turbidity sensing probe (108) below the liquid level monitors the turbidity of the liquid at each horizontal position; S2.

1. The suction branch pipe (110) above the liquid level is closed; S2.

2. The turbidity sensor probe (108) aligned with the liquid suction branch (110) is closed when the turbidity of the liquid exceeds the standard; S2.

3. The liquid suction branch (110) aligned with the turbidity sensor probe (108) that monitors that the liquid turbidity does not exceed the standard is opened; S3. The first liquid pump (4) is started, and the liquid sucked by the multiple liquid suction branches (110) enters the main liquid suction pipe (109). The pH monitoring mechanism (112) detects the pH of the liquid, and the liquid is injected into the corresponding position of the diversion chamber (201) through the acid injection branch (501); S4. According to the pH parameter of the liquid detected by the pH monitoring mechanism (112), the alkali solution injection branch (601) performs an alkali solution injection operation at an appropriate rate into the opened acid solution injection branch (501); S5. The second distance sensing modules (208) detect the liquid level in the respective diversion chambers (201), and the pH sensors (205) detect the pH of the upper liquid in the respective diversion chambers (201); S5.

1. When the second distance sensing module (208) detects that the liquid level in the diversion chamber (201) is too high, the acid injection branch pipe (501) connected to the diversion chamber (201) is closed, until the second distance sensing module (208) detects that the liquid level in the diversion chamber (201) is not too high, and the acid injection branch pipe (501) connected to the diversion chamber (201) is opened again; S5.

2. The pH sensor (205) detects that the pH of the upper layer of the liquid in the diversion chamber (201) reaches the neutralization reaction standard, the third liquid pump (9) is started, the external connecting branch pipe (801) directly above the diversion chamber (201) is opened, and the upper layer of the liquid in the diversion chamber (201) is introduced into the neutralization tank (3) through the movable connecting pipe (203), the fixed support pipe (202), the external connecting branch pipe (801), and the third liquid pump (9).

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