Treatment and Recovery Device for Zinc-Nickel Alloy Wastewater

Abstract

The present invention discloses a treatment and recovery device for zinc-nickel alloy wastewater in the field of zinc-nickel alloy wastewater treatment devices, including a water delivery pipeline for inputting zinc-nickel alloy wastewater, a reaction tank for pH adjustment, and an effluent pipeline for outputting zinc-nickel alloy wastewater; the reaction tank is connected to both the water delivery pipeline and the effluent pipeline, and the reaction tank is also connected to a chemical dosing mechanism for adding acid-base regulators and a constant temperature mechanism for adjusting the temperature of the reaction tank; a monitoring component is arranged at the top of the reaction tank. In the present invention, by reducing the influence of objective factors on the pH value detection of wastewater during pH adjustment of the wastewater and reducing false detections during pH value detection, the pH detection during the treatment and recovery process of zinc-nickel alloy wastewater is made more accurate and effective, enabling the wastewater to reach the preset pH value more accurately, so that the heavy metals in the zinc-nickel alloy wastewater can be more fully precipitated, treated, and recovered.

Description

Technical Field

[0001] The present invention belongs to the field of zinc-nickel alloy wastewater treatment devices, and specifically relates to a treatment and recovery device for zinc-nickel alloy wastewater. Background Art

[0002] In recent years, China's electroplating industry has continued to maintain a growth trend and will develop towards high quality and high quality in the future, showing new trends such as an increase in varieties and diversified consumption. Among them, acidic zinc-nickel alloy electroplating and alkaline zinc-nickel alloy electroplating are the two main electroplating processes. Due to the problems of toxicity, bioaccumulation, non-degradability, large treatment scale and long cycle of heavy metal pollution in zinc-nickel alloy wastewater, it is crucial to treat and recover the zinc-nickel alloy wastewater after electroplating.

[0003] During the treatment of zinc-nickel alloy wastewater, it is necessary to adjust the pH value of the wastewater multiple times to precipitate heavy metal impurities. In order to improve the efficiency of wastewater pH adjustment, Chinese patent document CN113233567A provides a wastewater pH adjustment device, including: a pH adjustment tank provided with a feed pipe and a discharge pipe; a pipe mixer arranged outside the pH adjustment tank, with the first end connected to the bottom of the pH adjustment tank through a first pipeline, the second end connected to a second pipeline and the second pipeline extending into the pH adjustment tank, and an acid addition pipe and an alkali addition pipe are also connected to the pipe mixer. In the wastewater pH adjustment device provided by the invention, after the liquid to be adjusted is fed into the pH adjustment tank through the feed pipe, it will enter the pipe mixer through the first pipeline. In the pipe mixer, the liquid to be adjusted will be mixed at the primary level with the acid solution or alkali solution fed from the acid addition pipe or alkali addition pipe, and then sent back into the pH adjustment tank through the second pipeline for further mixing. In this way, the liquid to be adjusted and the acid solution or alkali solution will be primarily mixed in the pipe mixer and then enter the pH adjustment tank for further mixing, thereby enhancing the mixing effect and improving the efficiency of pH adjustment.

[0004] In actual use, although the above technical solution can improve the pH adjustment efficiency, during the mixing process of zinc-nickel alloy wastewater and the regulator, due to the exothermic and endothermic reactions between the regulator and zinc-nickel alloy wastewater, the temperature of the zinc-nickel alloy wastewater will change violently. If the adjustment is made after the temperature change, the control efficiency of the treatment temperature of the zinc-nickel alloy wastewater will be reduced, and even the zinc-nickel alloy wastewater may be treated at an inappropriate temperature for a period of time; secondly, there may be situations where the addition amount of the regulator is inappropriate and the pH value measurement is inaccurate, which will lead to a decrease in the pH adjustment accuracy of the wastewater and cause the heavy metals in the wastewater to not be effectively precipitated. Summary of the Invention

[0005] The object of the present invention is to provide a treatment and recovery device for zinc-nickel alloy wastewater, which can accurately monitor the pH value of the wastewater in real time, add a regulator according to the real-time pH value of the wastewater, reduce the influence of objective factors during pH adjustment, and improve the pH adjustment accuracy during the treatment and recovery of zinc-nickel alloy wastewater.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A treatment and recovery device for zinc-nickel alloy wastewater includes a water delivery pipe for inputting zinc-nickel alloy wastewater, a reaction tank for pH adjustment, and an outlet pipe for outputting zinc-nickel alloy wastewater; the reaction tank is connected to both the water delivery pipe and the outlet pipe, and the reaction tank is also connected to a chemical dosing mechanism for adding acid-base regulators and a constant temperature mechanism for adjusting the temperature of the reaction tank;

[0008] A monitoring component is arranged on the top of the reaction tank. The detection component includes a cover plate. A camera for photographing the wastewater in the reaction tank and a first liquid level sensor for detecting the liquid level of the wastewater in the reaction tank are installed at the bottom of the cover plate; a motor is arranged on the top of the cover plate. The output shaft of the motor penetrates the cover plate, and the output shaft of the motor is coaxially and fixedly connected with a stirring component. The motor is signal-connected to a motor controller. A plurality of first pH meters for monitoring the pH value of the wastewater in the reaction tank are arranged along the height direction of the side wall of the reaction tank and numbered. A temperature sensor is also arranged on the side wall of the reaction tank. A setting panel for displaying data and receiving user input data is installed on the outer side wall of the reaction tank. The setting panel is signal-connected to a control module. The control module is respectively signal-connected to the temperature sensor, the first pH meter, the motor controller, the first liquid level sensor, the camera, the constant temperature mechanism, and the chemical dosing mechanism.

[0009] The technical principle of the above solution is as follows:

[0010] The pH values of the wastewater at different heights in the reaction tank are monitored by the first pH meters at different liquid level heights. The control module receives the pH values monitored by all the first pH meters. At the same time, the liquid level height of the wastewater in the reaction tank is monitored by the first liquid level sensor. The first pH meter above the wastewater surface is obtained through the liquid level height, and the pH values collected by the first pH meter above the wastewater surface received in the control module are removed according to its number, so as to avoid the influence of the pH value of the splashing wastewater collected by the first pH meter above the wastewater on the pH value detection result.

[0011] By accelerating the rotation of the stirring component and then obtaining the pH value collected by the first pH meter, based on the pH values of the wastewater at different heights, when the pH value of the wastewater at a local height meets the preset value, the stirring speed of the stirring component is increased, and the pH value is collected again when the wastewater is mixed more fully with the regulator, so as to increase the accuracy of the pH value detection result. When the pH values collected by all the first pH meters meet the preset values, it means that the pH value of the wastewater meets the requirements.

[0012] The temperature of the wastewater is monitored by a temperature sensor. Since the pH value is affected by temperature, when the temperature exceeds the preset value, the temperature of the wastewater in the reaction tank is adjusted by a constant temperature mechanism, thereby reducing the influence of temperature on the pH value detection result of the wastewater.

[0013] The real-time image information of the wastewater is collected by a camera to observe whether there is an obvious situation where the regulator is not evenly mixed in the wastewater, and the rotation speed of the motor is controlled, so that the regulator and the wastewater are fully mixed and reacted, avoiding a large difference in local pH value, and thus the influence of the uneven mixing reaction of the regulator on the pH value detection result of the wastewater.

[0014] The above-mentioned scheme has the following beneficial effects:

[0015] 1. Compared with the prior art, in this scheme, the pH of the wastewater at different heights in the reaction tank is detected, and the adjustment of the pH is stopped only when the wastewater at different heights meets the pH value requirements, making the pH adjustment of the wastewater more accurate. In addition, during the pH adjustment process, the pH of the wastewater at different heights is collected in real time, and based on the pH difference of the wastewater at different heights, the reaction degree between the waste liquid and the acid-base regulator and the mixing uniformity between the wastewater and the acid-base regulator are obtained. Based on this, by controlling the stirring rate of the stirring component, the full reaction between the acid-base regulator and the wastewater can be effectively promoted, thereby improving the adjustment efficiency of the wastewater pH; at the same time, in the prior art, the stirring component usually runs at a constant speed for a long time, while in this scheme, the rotation speed of the stirring component is adaptively adjusted according to the pH adjustment situation. When the acid-base regulator and the wastewater are fully mixed, the rotation speed of the stirring component is slowed down, thereby reducing energy consumption.

[0016] 2. Compared with the prior art, during the high-speed stirring process due to pH difference, the stirring component in this scheme can effectively peel off the sediment covering the surface of the first acid-base agent, avoiding the situation where the sediment in the wastewater covers the surface of the detection end of the first acid-base agent during the sedimentation process, resulting in inaccurate pH detection of the first acid-base agent.

[0017] 3. Compared with the prior art, in this solution, by collecting the image of the wastewater in the reaction tank, the regulator that has not been fully mixed and reacted can be fully mixed, avoiding excessive adjustment of the wastewater pH by adding excessive acid-base regulators. On the other hand, since the stirring component will stir during the pH adjustment of the wastewater, when the stirring speed is too fast, a large number of ripples will appear on the wastewater liquid surface and even vortices will appear in the center of the wastewater. In this case, the accuracy of the liquid surface height detected by the first liquid level sensor will decrease, resulting in inaccurate judgment of the situation where the first acid-base agent is submerged by the wastewater. At this time, the image information collected by the camera is switched to, and the situation where the first acid-base agent is submerged by the wastewater can be intuitively obtained, thus more reliably avoiding the recording of invalid data collected by the first acid-base agent, and further improving the accuracy of pH value detection.

[0018] In summary, this technical solution reduces the influence of objective factors on the pH value detection of wastewater during the pH adjustment of wastewater, makes the pH detection in the process of zinc-nickel alloy wastewater treatment and recovery more accurate, and enables the heavy metals in the zinc-nickel alloy wastewater to be more fully precipitated, treated and recovered.

[0019] Further, the dosing mechanism includes an alkali medicine tank and an acid medicine tank. The alkali medicine tank and the acid medicine tank are respectively used to provide an alkaline regulator and an acidic regulator. Stirring devices for stirring the regulator are arranged on the tops of the alkali medicine tank and the acid medicine tank respectively. Second acid-base meters for detecting the pH value of the regulator are arranged on the sides of the alkali medicine tank and the acid medicine tank respectively. The alkali medicine tank and the acid medicine tank are both communicated with the reaction tank through dosing pipes, and dosing pumps are communicated on the dosing pipes. The stirring devices, the second acid-base meters, and the dosing pumps are all signal-connected to the control module.

[0020] Beneficial effects: When a regulator needs to be added, the stirring device on the corresponding medicine tank is controlled by the control module to rotate, so as to mix the regulator, making it have the best alkalinity or acidity when the regulator is used. At the same time, the pH value of the regulator in the alkali medicine tank and the acid medicine tank is monitored in real time through the second acid-base meter, facilitating the real-time adjustment of the addition amount of the regulator.

[0021] Further, second liquid level sensors and alarms for detecting the liquid level of the regulator in the alkali medicine tank and the acid medicine tank are arranged on the tops of the alkali medicine tank and the acid medicine tank respectively. The second liquid level sensors and the alarms are both signal-connected to the control module.

[0022] Beneficial effects: The liquid level of the regulator in the alkali medicine tank and the acid medicine tank is monitored through the second liquid level sensor. When the liquid level of the regulator in the alkali medicine tank and the acid medicine tank is too low, that is, when the remaining amount of the regulator in the alkali medicine tank and the acid medicine tank is too low, the controller controls the alarm to give a prompt, facilitating the timely addition of the regulator in the alkali medicine tank and the acid medicine tank.

[0023] Further, electronic meters and first solenoid valves are communicated on the dosing pipes respectively. The electronic meters and the first solenoid valves are both signal-connected to the control module.

[0024] Beneficial effects: The adjustment dose added to the reaction tank through the chemical addition pipe is monitored by an electronic meter, and when the preset value is reached, the control module controls the first solenoid valve to stop adding the regulator to the reaction tank, thereby more effectively avoiding excessive additives from being added to the reaction tank.

[0025] Furthermore, the constant temperature mechanism includes a constant temperature tank opened in the side wall of the reaction tank. The constant temperature tank is connected to a heating pipe for supplying heated water and a first recovery pipe for recovering the heated water. The constant temperature tank is also connected to a cooling pipe for supplying cooling water and a second recovery pipe for recovering the cooling water. The heating pipe, the first recovery pipe, the cooling pipe, and the second recovery pipe are all connected to a second solenoid valve, and the second solenoid valves are all signal-connected to the control module.

[0026] Beneficial effects: The temperature of the wastewater in the reaction tank is monitored by a temperature sensor. When the temperature of the wastewater in the reaction tank exceeds the threshold range, the control module controls the second solenoid valve to open. When the temperature is higher than the threshold, the second solenoid valves of the cooling pipe and the second recovery pipe are opened, so that the cooling water enters the constant temperature tank to reduce the temperature of the wastewater in the reaction tank through heat exchange; when the temperature is lower than the threshold, the second solenoid valves of the heating pipe and the first recovery pipe are opened, so that the heated water enters the constant temperature tank to increase the temperature of the wastewater in the reaction tank through heat exchange; thus, the pH can be carried out at a temperature suitable for pH detection, reducing the influence of temperature on pH detection and making the pH detection result more accurate.

[0027] Furthermore, a plurality of temperature sensors are provided, and the temperature sensors are arranged along the length direction of the reaction tank.

[0028] Beneficial effects: The temperature sensors at different heights detect the temperatures of the wastewater at different heights in the reaction tank, avoiding the local temperature of the wastewater from exceeding the threshold range, and thus starting the constant temperature mechanism to cool the whole wastewater.

[0029] Furthermore, a light transmission groove is opened on the cover plate, and a transparent glass plate is fixedly connected in the light transmission groove.

[0030] Beneficial effects: The transparent glass plate provides more sufficient light inside the reaction tank, enabling the camera to collect clearer wastewater image information.

[0031] Furthermore, the stirring assembly includes a stirring shaft and stirring blades. The stirring shaft is coaxially and fixedly connected to the output shaft of the motor, the stirring blades are fixedly connected to the stirring shaft, and the stirring blades have the same structure as the inner side wall of the reaction tank.

[0032] Beneficial effects: The stirring blades have the same structure as the inner side wall of the reaction tank, which can make the waste liquid in the reaction tank be stirred and mixed to a greater extent, improving the adjustment efficiency of the wastewater pH and the detection accuracy of the pH.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Brief Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of an embodiment of the zinc-nickel alloy wastewater treatment device of the present invention;

[0035] Figure 2 It is a cross-sectional view of the reaction tank of an embodiment of the zinc-nickel alloy wastewater treatment device of the present invention;

[0036] Figure 3 It is a schematic circuit diagram of an embodiment of the zinc-nickel alloy wastewater treatment device of the present invention. Detailed Description of the Embodiments

[0037] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0039] In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a mechanical connection or an electrical connection, or may be the internal communication of two elements. It may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] The following will be further described in detail through specific embodiments:

[0041] The reference numerals in the accompanying drawings of the specification include: stirring device 1, acid medicine tank 2, second acid-base meter 3, alarm 4, second liquid level sensor 5, alkali medicine tank 6, medicine adding pipe 7, reaction tank 8, heating pipe 9, first recovery pipe 10, cooling pipe 11, second recovery pipe 12, second solenoid valve 13, water outlet pipe 14, motor 15, first liquid level sensor 16, water conveying pipe 17, first solenoid valve 18, medicine adding pump 19, cover plate 101, panel 102, first acid-base meter 103, constant temperature bath 104, stirring blade 105, temperature sensor 106, stirring shaft 107, camera 108, transparent glass plate 109.

[0042] Example 1: As shown in the attached Figures 1 to 3 figure: The treatment and recovery device for zinc-nickel alloy wastewater includes a water conveying pipe 17 for inputting zinc-nickel alloy wastewater, a reaction tank 8 for pH adjustment, and a water outlet pipe 14 for outputting zinc-nickel alloy wastewater. The reaction tank is respectively connected to the water conveying pipe 17 and the water outlet pipe 14; the water conveying pipe 17 is connected to the wastewater stock solution, and a horizontal centrifugal pump is connected to convey the wastewater stock solution into the reaction tank 8. The reaction tank 8 is cylindrical and is made of corrosion-resistant materials. Since the pH adjustment range of the wastewater is between 3.5 and 11, the reaction tank 8 is made of materials with a corrosion-resistant pH range of 2 to 12. In this example, it is made of steel. The water outlet pipe 14 is connected to the reaction tank 8 where the wastewater undergoes complexation precipitation, and a horizontal centrifugal pump is connected to convey the wastewater with adjusted pH into it.

[0043] The reaction tank 8 is also connected to a medicine adding mechanism for adding acid-base regulators and a constant temperature mechanism for adjusting the temperature of the reaction tank 8.

[0044] A monitoring component is arranged on the top of the reaction tank 8. The detection component includes a cover plate 101. Support blocks are evenly distributed on the circumference of the bottom of the cover plate 101. The support blocks are detachably connected to the opening of the reaction tank 8. A camera 108 for photographing the wastewater in the reaction tank 8 and a first liquid level sensor 16 for detecting the liquid level of the wastewater in the reaction tank 8 are symmetrically installed at the bottom of the cover plate 101 by screws. The camera 108 is a corrosion-resistant camera 108, with the specific model being MC-FSB-10. Using a corrosion-resistant camera 108 to photograph the wastewater in the reaction tank 8 is not easily corroded and damaged. The first liquid level sensor 16 is an infrared photoelectric liquid level sensor with the specific model being TC-83AT.

[0045] At the top of the cover plate 101, a motor 15 is fixedly connected by bolts. The motor 15 is a reduction motor 15. The output shaft of the motor 15 penetrates through the cover plate 101. The output shaft of the motor 15 is coaxially and fixedly connected with a stirring assembly. The motor 15 is signal-connected to a motor 15 controller. Six first acid-base meters 103 are arranged on the side wall of the reaction tank 8 along its height direction. The detection end of the first acid-base meter 103 extends into the reaction tank 8. The model of the first acid-base meter 103 is SM2120A. This type of acid-base meter is equipped with an RS232 communication interface, which can facilitate data collection, and the first acid-base meter 103 is numbered, combined with the attached Figure 2 As shown, the two first acid-base meters 103 on the left and right of the top layer are the A first acid-base meter 103 and the B first acid-base meter 103 respectively. The two first acid-base meters 103 on the left and right of the middle layer are the C first acid-base meter 103 and the D first acid-base meter 103 respectively. The two first acid-base meters 103 on the left and right of the bottom layer are the E first acid-base meter 103 and the F first acid-base meter 103 respectively.

[0046] A temperature sensor 106 is also fixedly installed on the side wall of the reaction tank 8 by screws. The detection end of the temperature sensor 106 extends into the reaction tank 8. An installation panel 102 is fixedly installed on the outer side wall of the reaction tank 8 by screws. The setting panel 102 is signal-connected to a control module. The control module uses an STM32 series single-chip microcomputer, specifically STM32F103C8T6. The control module is respectively signal-connected to the temperature sensor 106, the first acid-base meter 103, the motor 15 controller, the first liquid level sensor 16, the camera 108, the constant temperature mechanism and the chemical dosing mechanism.

[0047] The specific implementation process is as follows:

[0048] The pH values of the wastewater at different heights in the reaction tank 8 are monitored by the first acid-base meter 103. The control module receives the pH values monitored by all the first acid-base meters 103. At the same time, the wastewater liquid level height in the reaction tank 8 is monitored by the first liquid level sensor 16. The first acid-base meter 103 located above the wastewater surface is obtained through the liquid level height, and the pH values collected by the first acid-base meter 103 located above the wastewater surface received in the control module are removed according to its number. For example, if the first liquid level sensor 16 detects that the wastewater liquid level height in the reaction tank 8 only covers the F first acid-base meter 103, the E first acid-base meter 103, the D first acid-base meter 103 and the C first acid-base meter 103, then the control module does not collect the data of the A first acid-base meter 103 and the B first acid-base meter 103, because the A first acid-base meter 103 and the B first acid-base meter 103 do not collect the pH in the wastewater, but may collect the pH of the wastewater splashed onto the A first acid-base meter 103 and the B first acid-base meter 103 during the wastewater stirring process, thus avoiding the pH of the splashed wastewater collected by the first acid-base meter 103 located above the wastewater from affecting the pH value detection result.

[0049] When the control module obtains the pH value collected by the first acid-base meter 103 each time, it preferentially sends a control signal to the motor 15 controller. The motor 15 controller controls the rotation speed of the motor 15 to accelerate the rotation of the stirring assembly and then obtains the pH value collected by the first acid-base meter 103. The pH value measured after the solution is fully mixed by stirring will be more accurate.

[0050] Based on the pH values of the wastewater at different heights, when the pH value of the wastewater at a local height meets the preset value, the stirring speed of the stirring assembly is increased to make the wastewater and the regulator mix more fully before collecting the pH value, increasing the accuracy of the pH value detection result. When the pH values collected by all the first acid-base meters 103 meet the preset value, it is only then that the wastewater pH value is marked as meeting the requirements. For example, if it is necessary to adjust the pH of the wastewater to 3, when the F first acid-base meter 103 detects that the pH is 3, but the D first acid-base meter 103 detects that the pH is 3.5, it may be due to the insufficient mixing of the wastewater and the regulator. Therefore, a control signal is sent to the motor 15 controller through the control module to control the rotation speed or the rotation duration of the motor 15 to make the wastewater and the regulator continue to mix. When both the F first acid-base meter 103 and the D first acid-base meter 103 detect that the pH is 3, it means that the wastewater at different heights has been adjusted to the preset pH value. At this time, the data collected by the first acid-base meter 103 is valid data. The user can set a tolerance value according to the need. When the difference between the first acid-base meters 103 at different heights is within the tolerance value, it is valid data.

[0051] The temperature of the wastewater is monitored by the temperature sensor 106. Since the pH value is affected by temperature, when the temperature exceeds the preset value, the temperature of the wastewater in the reaction tank 8 is adjusted by the constant temperature mechanism, thereby reducing the influence of temperature on the wastewater pH value detection result. The standard detection temperature of the pH value is 25 °C. If you want to check the pH value more accurately, the temperature should be controlled near 25 °C.

[0052] The real-time image information of the wastewater is collected by the camera 108 to observe whether there is an obvious situation where the regulator in the wastewater is not evenly mixed, and the rotation speed of the motor 15 is controlled. When it is monitored and photographed that the regulator in a certain part of the wastewater is not evenly mixed, a control signal is sent to the motor 15 controller through the control module to increase the rotation speed of the motor 15 to make the stirring assembly quickly stir the wastewater and the regulator, so that the regulator and the wastewater are fully mixed and reacted, avoiding a large difference in the local pH value, and thus avoiding the influence of the unreacted and unmixed regulator on the wastewater pH value detection result.

[0053] Example 2: As attached Figures 1 to 3As shown: Compared with the first embodiment, the difference lies in that the chemical dosing mechanism includes an alkali medicine tank 6 and an acid medicine tank 2. The alkali medicine tank 6 and the acid medicine tank 2 are respectively used to provide an alkaline regulator and an acidic regulator, that is, to provide sulfuric acid medicine and sodium hydroxide medicine respectively. Stirring devices 1 for stirring the regulators are provided at the tops of the alkali medicine tank 6 and the acid medicine tank 2. The stirring devices 1 are arranged in the manner of the motor 15 and the stirring assembly in the above-mentioned embodiment. Second acid-base meters 3 for detecting the pH value of the regulator are fixedly installed on the sides of the alkali medicine tank 6 and the acid medicine tank 2 through screws. The detection ends of the second acid-base meters 3 extend into the reaction tank 8. The model of the second acid-base meter 3 is SM2120A. The alkali medicine tank 6 and the acid medicine tank 2 are both communicated with the reaction tank 8 through a chemical dosing pipe 7. Chemical dosing pumps 19 are communicated on the chemical dosing pipes 7. The stirring devices 1, the second acid-base meters 3, and the chemical dosing pumps 19 are all signal-connected to the control module.

[0054] The specific implementation process is as follows:

[0055] After the control module collects the effective pH value of the wastewater in the reaction tank 8, if sulfuric acid medicine needs to be added, the control module sends a control signal to the stirring device 1 to pre-stir the sulfuric acid in the acid medicine tank 2 through the stirring device. At the same time, the pH value of the sulfuric acid collected by the second acid-base meter 3 is combined with the wastewater liquid level height and the effective pH value of the wastewater in the reaction tank 8 to calculate the amount of sulfuric acid to be added. Subsequently, the control module sends a control signal to the chemical dosing pump 19 corresponding to the acid medicine tank 2. The chemical dosing pump 19 transports the sulfuric acid into the reaction tank 8. The first liquid level sensor 16 detects the liquid level change. When the liquid level height after adding sulfuric acid is reached, the controller notifies the chemical dosing pump 19 to operate, thereby completing the chemical dosing.

[0056] Embodiment Three: As shown in the appendix Figure 1 and the appendix Figure 3 As shown: Compared with the second embodiment, the difference lies in that second liquid level sensors 5 and alarms 4 for detecting the liquid level of the regulators in the alkali medicine tank 6 and the acid medicine tank 2 are fixedly installed on the tops of the alkali medicine tank 6 and the acid medicine tank 2 through screws. The second liquid level sensor 5 adopts an infrared photoelectric liquid level sensor, and the specific model is TC-83AT. The second liquid level sensor 5 and the alarm 4 are both signal-connected to the control module.

[0057] The specific implementation process is as follows:

[0058] The second liquid level sensor 5 monitors the liquid level height inside the alkali medicine tank 6 and the acid medicine tank 2. When it detects that the liquid level height in the alkali medicine tank 6 or the acid medicine tank 2 is too low, it is displayed on the panel 102 through the control module, and the alarm 4 is started through the controller to remind that the regulator in the alkali medicine tank 6 or the acid medicine tank 2 is insufficient.

[0059] Embodiment Four: As shown in the appendix Figure 1 and the appendix Figure 3As shown: Compared with the third embodiment, the difference lies in that electronic meters and first solenoid valves 18 are connected to the chemical addition pipes 7, and both the electronic meters and the first solenoid valves 18 are in signal connection with the control module.

[0060] The specific implementation process is as follows:

[0061] When the chemical addition pump 19 starts to deliver the regulator to the reaction tank 8, the electronic meter detects the dosing amount of the regulator passing through the chemical addition pipe 7, and the control module obtains the data collected by the electronic meter. When the data collected by the motor 15 meter corresponds to the dosing amount of the regulator to be added, the controller is sent to close the first solenoid valve 18, and then a control signal is sent to the chemical addition pump 19 to stop the operation of the chemical addition pump 19, making the addition amount of the regulator more accurate.

[0062] Embodiment Five: As shown in the appendix Figures 1 to 3 As shown: Compared with the fourth embodiment, the difference lies in that the temperature control mechanism includes a temperature control tank 104 opened in the side wall of the reaction tank 8. The temperature control tank 104 is connected to a heating pipe 9 for supplying heating water and a first recovery pipe 10 for recovering the heating water. The temperature control tank 104 is also connected to a cooling pipe 11 for supplying cooling water and a second recovery pipe 12 for recovering the cooling water. The heating pipe 9, the first recovery pipe 10, the cooling pipe 11, and the second recovery pipe 12 are all connected to second solenoid valves 13, and the second solenoid valves 13 are all in signal connection with the control module.

[0063] The specific implementation process is as follows:

[0064] The temperature sensor 106 monitors the temperature of the wastewater in the reaction tank 8. When the temperature of the wastewater in the reaction tank 8 exceeds the threshold range (near 25 °C), the second solenoid valve 13 is controlled to open through the control module. When the temperature is higher than the threshold, the second solenoid valves 13 of the cooling pipe 11 and the second recovery pipe 12 are opened, so that the cooling water enters the temperature control tank 104 to reduce the temperature of the wastewater in the reaction tank 8 through heat exchange; when the temperature is lower than the threshold, the second solenoid valves 13 of the heating pipe 9 and the first recovery pipe 10 are opened, so that the heating water enters the temperature control tank 104 to increase the temperature of the wastewater in the reaction tank 8 through heat exchange; thus, the pH can be carried out at a temperature suitable for pH detection, reducing the influence of temperature on pH detection and making the pH detection result more accurate.

[0065] Embodiment Six: As shown in the appendix Figure 2 As shown: Compared with the fifth embodiment, the difference lies in that three temperature sensors 106 are provided, and the temperature sensors 106 are arranged along the length direction of the reaction tank 8 and have the same installation height as the first acid-base meter 103.

[0066] The specific implementation process is as follows:

[0067] Three temperature sensors 106 at different heights monitor the temperatures of the wastewater at different heights in the reaction tank 8. When the temperatures detected by the upper and lower temperature sensors 106 are different, the control module sends a control signal to make the stirring assembly stir faster, and then the temperature is detected again. When it is monitored that the temperatures of the upper and lower layers both exceed the threshold range, the constant temperature mechanism is started through the control assembly.

[0068] Embodiment Seven: As shown in the appendix Figure 2 : Compared with Embodiment Six, the difference is that a light-transmitting ring groove is formed on the cover plate 101, and a transparent glass plate 109 is adhesively fixed in the light-transmitting ring groove.

[0069] The specific implementation process is as follows: External natural light or light passes through the transparent glass plate 109 to provide light inside the reaction tank 8, so that the camera 108 can capture a clearer wastewater image.

[0070] Embodiment Eight: As shown in the appendix Figure 2 : Compared with Embodiment Seven, the difference is that the stirring assembly includes a stirring shaft 107 and stirring blades 105. The stirring shaft 107 is coaxially and fixedly connected to the output shaft of the motor 15 through a coupling. The stirring blades 105 are fixedly welded to the stirring shaft 107, and the stirring blades 105 have the same structure as the inner side wall of the reaction tank 8.

[0071] The specific implementation process is as follows:

[0072] The stirring blades 105 have the same structure as the inner side wall of the reaction tank 8, and the waste liquid in the reaction tank 8 can be stirred and mixed to a greater extent during stirring.

[0073] The above are only the embodiments of the present invention. Common general knowledge of specific structures and / or characteristics in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. Treatment and recovery device for zinc-nickel alloy wastewater, characterized in that: It includes a water conveyance pipeline for inputting zinc-nickel alloy wastewater, a reaction tank for pH adjustment, and an effluent pipeline for outputting zinc-nickel alloy wastewater; the reaction tank is respectively connected to the water conveyance pipeline and the effluent pipeline, and the reaction tank is also connected to a chemical dosing mechanism for adding acid-base regulators and a constant temperature mechanism for adjusting the temperature of the reaction tank; A monitoring component is arranged on the top of the reaction tank. The monitoring component includes a cover plate. A camera for photographing the wastewater in the reaction tank and a first liquid level sensor for detecting the liquid level of the wastewater in the reaction tank are installed at the bottom of the cover plate; a motor is arranged on the top of the cover plate. The output shaft of the motor penetrates through the cover plate. The output shaft of the motor is coaxially and fixedly connected with a stirring component. The motor is signal-connected to a motor controller. A number of first pH meters for monitoring the pH value of the wastewater in the reaction tank are arranged along the height direction of the side wall of the reaction tank, and these first pH meters are numbered. A temperature sensor is also arranged on the side wall of the reaction tank. A setting panel for displaying data and receiving user input data is installed on the outer side wall of the reaction tank. The setting panel is signal-connected to a control module. The control module is respectively signal-connected to the temperature sensor, the first pH meter, the motor controller, the first liquid level sensor, the camera, the constant temperature mechanism and the chemical dosing mechanism; When the control module obtains the pH value collected by the first pH meter, it preferentially sends a control signal to the motor controller. The motor controller controls the rotation speed of the motor to make the stirring component rotate faster, and then obtains the pH value collected by the first pH meter; based on the pH values of the wastewater at different heights, when the pH value at a local height of the wastewater meets the preset value, the control module speeds up the stirring speed of the stirring component to make the wastewater and the acid-base regulator mix more fully, and then collects the pH value; when the pH values collected by all the first pH meters meet the preset value, it is marked that the pH value of the wastewater meets the requirements; The real-time image information of the wastewater is collected through the camera to observe whether there is a situation where the acid-base regulator in the wastewater is not evenly mixed. When it is photographed that the acid-base regulator in the wastewater is not evenly mixed, the control module sends a control signal to the motor controller to increase the motor speed, so that the stirring component quickly stirs the wastewater and the acid-base regulator to make the acid-base regulator and the wastewater fully mix and react; when the acid-base regulator and the wastewater are fully mixed, the rotation speed of the stirring component is slowed down.

2. The treatment and recovery device for zinc-nickel alloy wastewater according to claim 1, wherein: The acid-base regulator includes an alkaline regulator and an acidic regulator. The chemical dosing mechanism includes an alkaline medicine tank and an acidic medicine tank. The alkaline medicine tank and the acidic medicine tank are respectively used to provide the alkaline regulator and the acidic regulator. Stirring devices for stirring the alkaline regulator and the acidic regulator are respectively arranged on the tops of the alkaline medicine tank and the acidic medicine tank. Second pH meters for detecting the pH values of the alkaline regulator and the acidic regulator are respectively arranged on the sides of the alkaline medicine tank and the acidic medicine tank. The alkaline medicine tank and the acidic medicine tank are both connected to the reaction tank through chemical dosing pipes, and chemical dosing pumps are connected to the chemical dosing pipes. The stirring devices, the second pH meters and the chemical dosing pumps are all signal-connected to the control module.

3. The treatment and recovery device for zinc-nickel alloy wastewater according to claim 2, characterized in that: Second liquid level sensors and alarms are provided at the tops of the alkali medicine tank and the acid medicine tank. The second liquid level sensor provided at the top of the alkali medicine tank is used to detect the liquid level of the alkaline regulator, and the second liquid level sensor provided at the top of the acid medicine tank is used to detect the liquid level of the acidic regulator. Both the second liquid level sensor and the alarm are signal-connected to the control module.

4. The treatment and recovery device for zinc-nickel alloy wastewater according to claim 3, characterized in that: Electronic meters and first solenoid valves are connected in series on the chemical dosing pipes. Both the electronic meters and the first solenoid valves are signal-connected to the control module.

5. The treatment and recovery device for zinc-nickel alloy wastewater according to claim 4, wherein: The temperature control mechanism includes a temperature control tank opened in the side wall of the reaction tank. The temperature control tank is connected to a heating pipe for supplying heating water and a first recovery pipe for recovering heating water. The temperature control tank is also connected to a cooling pipe for supplying cooling water and a second recovery pipe for recovering cooling water. Second solenoid valves are provided in series on the heating pipe, the first recovery pipe, the cooling pipe and the second recovery pipe. The second solenoid valves are all signal-connected to the control module.

6. The treatment and recovery device for zinc-nickel alloy wastewater according to claim 5, characterized in that: A number of temperature sensors are provided and arranged along the length direction of the reaction tank.

7. The treatment and recovery device for zinc-nickel alloy wastewater according to claim 6, characterized in that: A light transmission ring groove is formed in the cover plate, and a transparent glass plate is fixedly connected in the light transmission ring groove.

8. The treatment and recovery device for zinc-nickel alloy wastewater according to claim 7, wherein: The stirring assembly includes a stirring shaft and stirring blades. The stirring shaft is coaxially and fixedly connected to the output shaft of the motor, the stirring blades are fixedly connected to the stirring shaft, and the stirring blades have the same structure as the inner side wall of the reaction tank.

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