Advanced treatment system for special pollutants in electroplating wastewater

Abstract

The utility model provides an advanced treatment system for special pollutants in electroplating wastewater, the system comprises a pre-treatment module, a special pollutant treatment module and a post-treatment module, an input port of the pre-treatment module is connected with a water outlet of the electroplating wastewater, an output port of the pre-treatment module is connected with an input port of the special pollutant treatment module, and an output port of the post-treatment module is connected with an output port of the special pollutant treatment module. The electroplating wastewater subjected to pH value adjustment by the pretreatment module and clarification reacts with a reactant in the special pollutant treatment module and then is discharged from an output port of the special pollutant treatment module, and an output port of the special pollutant treatment module is connected with an input port of the post-treatment module; the post-treatment module is used for re-adjusting the pH value of the electroplating wastewater reacted in the special pollutant treatment module, clarifying the electroplating wastewater, and outputting the treated electroplating wastewater through an output port of the post-treatment module. The special refractory pollutants in the electroplating wastewater can be effectively treated, so that the water quality of the treated electroplating wastewater reaches the standard, and a foundation is laid for subsequent biological treatment.

Description

Technical Field

[0001] The present application relates to the technical field of special pollutant treatment, and in particular to a deep treatment system for special pollutants in electroplating wastewater. Background Art

[0002] Electroplating wastewater contains a large amount of heavy metal ions and their complexes, refractory organic matter and other special pollutants, which have a great negative impact on subsequent biological treatment. Currently, traditional technologies such as biological filter and activated carbon adsorption are difficult to deeply treat these special pollutants.

[0003] Therefore, it is urgent to develop new and efficient processes for deep treatment of electroplating wastewater. Utility Model Content

[0004] In view of the problem that special pollutants in existing electroplating wastewater are difficult to deeply treat, the present application proposes a deep treatment system for special pollutants in electroplating wastewater.

[0005] The deep treatment system for special pollutants in electroplating wastewater includes: a pre-treatment module, a special pollutant treatment module, and a post-treatment module, wherein the input port of the pre-treatment module is connected to the outlet port of the electroplating wastewater, and the output port of the pre-treatment module is connected to the input port of the special pollutant treatment module. The electroplating wastewater whose pH value is adjusted and clarified by the pre-treatment module is discharged from the output port of the special pollutant treatment module after reacting with reactants in the special pollutant treatment module, and the output port of the special pollutant treatment module is connected to the input port of the post-treatment module. The post-treatment module readjusts the pH value of the electroplating wastewater after the reaction in the special pollutant treatment module and clarifies it, and outputs the treated electroplating wastewater through the output port of the post-treatment module.

[0006] Optionally, the pretreatment module includes a first pH regulator and a first clarifier, wherein the input port of the first pH regulator is connected to the outlet of the electroplating wastewater as the input port of the pretreatment module, the output port of the first pH regulator is connected to the input port of the first clarifier, and the output port of the first clarifier is connected to the input port of the special pollutant treatment module as the output port of the pretreatment module.

[0007] Optionally, the special pollutant treatment module includes an ultrasonic oxidation reactor, an extractor and a stripper, wherein the input port of the ultrasonic oxidation reactor is connected to the output port of the pre-treatment module as the input port of the special pollutant treatment module, the output port of the ultrasonic oxidation reactor is connected to the input port of the extractor, the output port of the extractor is connected to the input port of the stripper, and the output port of the stripper is connected to the input port of the post-treatment module as the output port of the special pollutant treatment module.

[0008] Optionally, the post-processing module includes a second pH regulator and a second clarifier, wherein the input port of the second pH regulator is connected to the output port of the special pollutant treatment module as the input port of the post-processing module, the output port of the second pH regulator is connected to the input port of the second clarifier, and the output port of the second clarifier serves as the output port of the post-processing module to output the treated electroplating wastewater.

[0009] Optionally, the system also includes a PLC, and a first PH value detection device is provided in the first PH regulator, and the first PH value detection device is used to detect the PH value of the electroplating wastewater flowing into the first PH regulator, wherein the first PH regulator and the first PH value detection device are respectively connected to the PLC, and the PLC is used to control the first PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the first PH regulator detected by the first PH value detection device.

[0010] Optionally, the ultrasonic oxidation reactor is provided with a piezoelectric ceramic converter, a temperature detector and a pressure detector, wherein the PLC is connected to the piezoelectric ceramic converter, the temperature detector and the pressure detector respectively, and the PLC is also used to control the operation of the piezoelectric ceramic converter, and to control the ultrasonic oxidation reactor according to the temperature value detected by the temperature detector and the pressure value detected by the pressure detector, so that the temperature and pressure of the ultrasonic oxidation reactor are stabilized within a preset temperature range and a preset pressure range.

[0011] Optionally, the reactant addition port of the extractor is connected to the extractant addition device, and the reactant recovery port of the extractor is connected to the extractant recovery device, wherein the PLC is respectively connected to the extractor, the extractant addition device and the extractant recovery device, and the PLC is used to control the extractor addition device to add the extractant to the extractor, and to recover the extractant to the extractant recovery device after the extractant is added to the extractor for a first reaction time, so as to control the reaction time of the extractant.

[0012] Optionally, the reactant addition port of the stripping agent is connected to the stripping agent addition device, and the reactant recovery port of the stripper is connected to the stripping agent recovery device, wherein the PLC is respectively connected to the stripper, the stripping agent addition device and the stripping agent recovery device, and the PLC is used to control the stripper addition device to add the stripping agent to the stripper, and to recover the stripping agent to the stripping agent recovery device after the stripping agent is added to the stripper for a second reaction time, so as to control the reaction time of the stripping agent.

[0013] Optionally, a second PH value detection device is provided in the second PH regulator, and the second PH value detection device is used to detect the PH value of the electroplating wastewater flowing into the second PH regulator, wherein the second PH regulator and the second PH value detection device are respectively connected to a PLC, and the PLC is used to control the second PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the second PH regulator detected by the second PH value detection device.

[0014] Optionally, the PLC is also used to control the input power of the piezoelectric ceramic converter so that the piezoelectric ceramic converter outputs a predetermined frequency.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Schematic diagram showing the deep treatment system for special pollutants in electroplating wastewater Figure 1 ;

[0018] Figure 2 Schematic diagram showing the deep treatment system for special pollutants in electroplating wastewater Figure 2 ;

[0019] Figure 3 Schematic diagram showing the deep treatment system for special pollutants in electroplating wastewater Figure 3 . DETAILED DESCRIPTION

[0020] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0021] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0022] The present application relates to a deep treatment system for special pollutants in electroplating wastewater. The deep treatment system for special pollutants in electroplating wastewater can adjust and clarify the pH value of the electroplating wastewater through a pre-treatment module, make the electroplating wastewater react with a reactant in the special pollutant treatment module, and can separate the heavy metals in the electroplating wastewater, and readjust the pH value of the electroplating wastewater in the post-treatment module and clarify it to obtain treated electroplating wastewater. The system can effectively treat special difficult-to-degrade pollutants in the electroplating wastewater, make the water quality of the treated electroplating wastewater meet the standard, greatly improve the biodegradation rate of the electroplating wastewater, and lay the foundation for subsequent biological treatment.

[0023] See also Figure 1 , Figure 1 Schematic diagram showing the deep treatment system for special pollutants in electroplating wastewater Figure 1 .like Figure 1 As shown, the deep treatment system for special pollutants in electroplating wastewater includes: a pre-treatment module 101, a special pollutant treatment module 102, and a post-treatment module 103.

[0024] Among them, the input port of the pre-treatment module is connected to the outlet of the electroplating wastewater, and the output port of the pre-treatment module is connected to the input port of the special pollutant treatment module. The electroplating wastewater whose pH value is adjusted and clarified by the pre-treatment module is discharged from the output port of the special pollutant treatment module after reacting with the reactant in the special pollutant treatment module. The output port of the special pollutant treatment module is connected to the input port of the post-treatment module. The post-treatment module readjusts the pH value of the electroplating wastewater after the reaction in the special pollutant treatment module and clarifies it, and outputs the treated electroplating wastewater through the output port of the post-treatment module.

[0025] Specifically, the pre-treatment module includes a first pH regulator and a first clarifier.

[0026] Among them, the input port of the first PH regulator is connected to the outlet of the electroplating wastewater as the input port of the pretreatment module, the output port of the first PH regulator is connected to the input port of the first clarifier, and the output port of the first clarifier is connected to the input port of the special pollutant treatment module as the output port of the pretreatment module.

[0027] Specifically, the special pollutant treatment module includes an ultrasonic oxidation reactor, an extractor and a stripper.

[0028] Among them, the input port of the ultrasonic oxidation reactor is connected to the output port of the pre-treatment module as the input port of the special pollutant treatment module, the output port of the ultrasonic oxidation reactor is connected to the input port of the extractor, the output port of the extractor is connected to the input port of the back-extractor, and the output port of the back-extractor is connected to the input port of the post-treatment module as the output port of the special pollutant treatment module.

[0029] Specifically, the post-processing module includes a second pH regulator and a second clarifier.

[0030] Among them, the input port of the second pH regulator is connected to the output port of the special pollutant treatment module as the input port of the post-processing module, the output port of the second pH regulator is connected to the input port of the second clarifier, and the output port of the second clarifier is used as the output port of the post-processing module to output the treated electroplating wastewater.

[0031] For example, see Figure 2 , Figure 2 Schematic diagram showing the deep treatment system for special pollutants in electroplating wastewater Figure 2 .like Figure 2 As shown, the deep treatment system for special pollutants in electroplating wastewater includes: a first pH regulator 201, a first clarifier 202, an ultrasonic oxidation reactor 203, an extractor 204, a stripper 205, a second pH regulator 206, a second clarifier 207, an extractant adding device 208, an extractant recovery device 209, a stripper adding device 210, and a stripper recovery device 211.

[0032] Here, the pre-treatment module composed of the first pH regulator and the first clarifier can perform preliminary treatment on the electroplating wastewater, adjust the pH value of the electroplating wastewater and remove suspended particles.

[0033] Here, the post-processing module composed of the second pH regulator and the second clarifier can process the solution after the stripping, adjust the pH value of the solution after the stripping and remove suspended particles.

[0034] Specifically, the ultrasonic oxidation reactor is used to carry out ultrasonic oxidation reaction on the treated electroplating wastewater. Ultrasonic oxidation can destroy the chemical bonds of refractory organic matter and generate intermediate products such as low molecular weight carboxylic acids, providing a good matrix for subsequent biological treatment.

[0035] Specifically, the extractor is used to extract the electroplating wastewater after the ultrasonic oxidation reaction to remove heavy metals in the water phase. The extractant can be a secondary amine, and the addition of the extractant and the control of the reaction time can be achieved through PLC.

[0036] Specifically, the stripper is used to strip the extracted heavy metal ions to efficiently recover copper, nickel, chromium and other ions in the water phase. The stripping agent can be dibutyl phosphate, and the addition of the stripping agent and the control of the reaction time can be achieved through PLC.

[0037] Here, it should be noted that the entire system needs to be controlled by PLC, including the addition of extractants, stripping agents, and the transfer of extractants containing heavy metal ions to the corresponding treatment devices. At the same time, PLC can also control parameters such as reaction time and temperature to ensure the automation and efficient operation of the entire treatment process.

[0038] Here, it should be understood that in the process of adding the extractant, the valve disposed between the extractant addition device and the extractor can be controlled by PLC control, in the process of adding the stripping agent, the valve disposed between the stripping agent addition device and the stripping agent can be controlled by PLC control, in the process of recovering the extractant, the valve disposed between the extractor and the extractant recovery device can be controlled by PLC control, and in the process of recovering the stripping agent, the valve disposed between the stripping agent and the stripping agent recovery device can be controlled by PLC control.

[0039] Specifically, the system further includes a PLC, and a first PH value detection device is provided in the first PH value regulator, and the first PH value detection device is used to detect the PH value of the electroplating wastewater flowing into the first PH regulator.

[0040] Wherein, the first PH regulator and the first PH value detection device are connected to the PLC respectively.

[0041] The PLC is used to control the first PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the first PH regulator detected by the first PH value detection device.

[0042] It should be noted that in the electroplating wastewater treatment system, the pH regulator is one of the key components, which is responsible for maintaining the wastewater within the appropriate pH range to ensure the effectiveness of subsequent treatment steps. Therefore, the material of the pH regulator must have the following characteristics: Chemical stability: The material should be able to resist the erosion of various chemicals that may exist in the wastewater, including acidic, alkaline substances and heavy metal ions; Corrosion resistance: The material should have good corrosion resistance to prevent corrosion or damage caused by long-term contact with electroplating wastewater; Durability: The material should have sufficient mechanical strength and durability to withstand the wear and pressure changes that may occur during the operation of the system.

[0043] Based on the above characteristics, it is recommended to use materials such as PVC (polyvinyl chloride), PTFE (polytetrafluoroethylene) or stainless steel to manufacture pH regulators. These materials have been widely used in the chemical and water treatment industries and are favored for their excellent corrosion resistance and chemical stability.

[0044] Specifically, the ultrasonic oxidation reactor is provided with a piezoelectric ceramic converter, a temperature detector and a pressure detector.

[0045] Wherein, the PLC is connected to the piezoelectric ceramic converter, the temperature detector and the pressure detector respectively.

[0046] The PLC is also used to control the operation of the piezoelectric ceramic converter, and to control the ultrasonic oxidation reactor according to the temperature value detected by the temperature detector and the pressure value detected by the pressure detector, so that the temperature and pressure of the ultrasonic oxidation reactor are stabilized within a preset temperature range and a preset pressure range.

[0047] It should be noted that the ultrasonic oxidation reactor is a key component in the electroplating wastewater treatment system for destroying refractory organic matter. The piezoelectric ceramic converter is the core component of the reactor, and its performance directly affects the output stability and efficiency of the ultrasonic wave. When selecting piezoelectric ceramic materials, the following characteristics should be considered: high conversion efficiency: the material should be able to effectively convert electrical energy into mechanical energy and produce stable and efficient ultrasonic waves; heat resistance: since high temperatures may be generated during ultrasonic oxidation, the material should be able to withstand the heat generated during continuous operation without degradation; chemical corrosion resistance: considering that the inside of the reactor will be exposed to various chemicals, the material should have good chemical corrosion resistance; mechanical strength: the material should have sufficient mechanical strength to withstand the stress generated by ultrasonic vibration.

[0048] Commonly used piezoelectric ceramic materials include lead zirconate titanate (PZT) and lithium niobate. These materials are widely used in ultrasonic equipment due to their excellent piezoelectric properties and stable chemical properties. For example, PZT material has a high piezoelectric coefficient, good temperature stability and excellent mechanical strength, making it an ideal choice for manufacturing ultrasonic oxidation reactors. This will make the electroplating wastewater treatment system have higher stability, efficiency and durability, thereby effectively treating pollutants in electroplating wastewater and improving the overall treatment effect.

[0049] Specifically, the reactant addition port of the extractor is connected to the extractant addition device, and the reactant recovery port of the extractor is connected to the extractant recovery device.

[0050] Wherein, the PLC is connected with the extractor, the extractant adding device and the extractant recovering device respectively.

[0051] The PLC is used to control the extractor adding device to add the extractant to the extractor, and to recover the extractant to the extractant recovery device after the extractant is added to the extractor for a first reaction time, so as to control the reaction time of the extractant.

[0052] Specifically, the reactant addition port of the stripping agent is connected to the stripping agent addition device, and the reactant recovery port of the stripping device is connected to the stripping agent recovery device.

[0053] Wherein, the PLC is connected with the stripper, the stripping agent adding device and the stripping agent recovering device respectively.

[0054] The PLC is used to control the stripper adding device to add stripping agent to the stripper, and to recover the stripping agent to the stripping agent recovery device after adding the stripping agent to the stripper for a second reaction time, so as to control the reaction time of the stripping agent.

[0055] Specifically, a second PH value detection device is provided in the second PH regulator, and the second PH value detection device is used to detect the PH value of the electroplating wastewater flowing into the second PH regulator.

[0056] Wherein, the second PH regulator and the second PH value detection device are respectively connected to the PLC.

[0057] The PLC is used to control the second PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the second PH regulator detected by the second PH value detection device.

[0058] Specifically, the PLC is also used to control the input power of the piezoelectric ceramic converter so that the piezoelectric ceramic converter outputs a predetermined frequency.

[0059] For example, the ultrasonic oxidation reactor should use a piezoelectric ceramic converter with a frequency of 28 kHz, and the output frequency of the piezoelectric ceramic converter is 28 KHz when the input power is 200 W. The reaction temperature is controlled at 60° C. and the pressure is 0.3 MPa.

[0060] Here, after 30 minutes of ultrasonic reaction, the TOC removal rate of the electroplating wastewater to be treated can reach more than 50%.

[0061] Exemplarily, the present application realizes double back extraction through an extractor and a back extractor, uses secondary amine as an extractant to extract heavy metals; and then uses dibutyl phosphate as an extractant to further extract heavy metals in the aqueous phase. The back extractant is 3mol / LH2SO4. Through two-stage back extraction, copper, nickel, chromium and other ions in the aqueous phase can be efficiently recovered, and the total recovery rate can reach more than 80%.

[0062] In this way, heavy metal ions can be efficiently separated and extracted through double back extraction technology to avoid toxic inhibition of biological treatment.

[0063] Here, the first clarifier and the second clarifier can adopt biofilm reactors, and the biofilm formed by the bacterial community can efficiently degrade organic matter and some heavy metals.

[0064] It should be noted that for ultrasonic oxidation technology and double back extraction technology, the reaction can be carried out in one device, but the reactor and control system need to be reasonably designed. A continuous process reactor system is required to carry out ultrasonic oxidation and double back extraction technology in one system. In this system, the ultrasonic oxidation reactor and the extractor can be connected together by pipelines, and the back extractor and the post-processing equipment can also be connected together by pipelines.

[0065] In this way, compared with the existing biological filter method and activated carbon adsorption method, the system of the present application can more effectively treat the refractory organic matter and heavy metal ions in the electroplating wastewater. Through the ultrasonic oxidation technology, the chemical bonds of the organic matter can be destroyed to generate intermediate products that are easily biodegradable, thereby improving the biodegradation rate of the wastewater. The use of PLC realizes the automation and precise control of the treatment process, reducing the complexity and error of manual operation. Through the double back extraction technology, heavy metals can be efficiently recovered, reducing resource waste, and reducing the cost and environmental risks of subsequent treatment.

[0066] For example, see Figure 3 , Figure 3 Schematic diagram showing the deep treatment system for special pollutants in electroplating wastewater Figure 3 .like Figure 3 As shown in the figure, the deep treatment system for special pollutants in electroplating wastewater includes:

[0067] The first pH regulator 201, the first clarifier 202, the ultrasonic oxidation reactor 203, the extractor 204, the stripper 205, the second pH regulator 206, the second clarifier 207, the extractant adding device 208, the extractant recovery device 209, the stripper adding device 210, the stripper recovery device 211 and the PLC 301.

[0068] The connection relationship and function between the first pH regulator 201, the first clarifier 202, the ultrasonic oxidation reactor 203, the extractor 204, the stripper 205, the second pH regulator 206, the second clarifier 207, the extractant adding device 208, the extractant recovery device 209, the stripper adding device 210, and the stripper recovery device 211 are as follows: Figure 2The connection relationship and function among the first pH regulator 201, the first clarifier 202, the ultrasonic oxidation reactor 203, the extractor 204, the stripper 205, the second pH regulator 206, the second clarifier 207, the extractant adding device 208, the extractant recovery device 209, the stripper adding device 210, and the stripper recovery device 211 are the same and will not be repeated here.

[0069] Specifically, an opening and closing valve (not shown in the figure) is provided between the outlet of the electroplating wastewater and the input port of the first regulator, and the PLC can control the opening and closing of the valve according to the needs and processing capacity of the entire system.

[0070] The first PH regulator is provided with a first PH value detection device (not shown in the figure), and the first PH value detection device is used to detect the PH value of the electroplating wastewater flowing into the first PH regulator.

[0071] Wherein, the first PH regulator and the first PH value detection device are connected to the PLC respectively.

[0072] Specifically, the PLC is used to control the first PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the first PH regulator detected by the first PH value detection device.

[0073] The ultrasonic oxidation reactor is provided with a piezoelectric ceramic converter (not shown in the figure), a temperature detector (not shown in the figure) and a pressure detector (not shown in the figure).

[0074] Wherein, the PLC is connected to the piezoelectric ceramic converter, the temperature detector and the pressure detector respectively.

[0075] Specifically, the PLC is also used to control the operation of the piezoelectric ceramic converter, and to control the ultrasonic oxidation reactor according to the temperature value detected by the temperature detector and the pressure value detected by the pressure detector, so that the temperature and pressure of the ultrasonic oxidation reactor are stabilized within a preset temperature range and a preset pressure range.

[0076] The reactant addition port of the extractor is connected to the extractant addition device, and the reactant recovery port of the extractor is connected to the extractant recovery device.

[0077] Wherein, the PLC is respectively connected to an extractor (not shown in the figure), an extractant adding device (not shown in the figure) and an extractant recovery device (not shown in the figure).

[0078] The PLC is used to control the extractor adding device to add the extractant to the extractor, and to recover the extractant to the extractant recovery device after the extractant is added to the extractor for a first reaction time, so as to control the reaction time of the extractant.

[0079] The reactant adding port of the stripping agent is connected to the stripping agent adding device, and the reactant recovery port of the stripping device is connected to the stripping agent recovery device.

[0080] Wherein, the PLC is respectively connected to a stripper (not shown in the figure), a stripping agent adding device (not shown in the figure) and a stripping agent recovery device (not shown in the figure).

[0081] The PLC is used to control the stripper adding device to add stripping agent to the stripper, and to recover the stripping agent to the stripping agent recovery device after adding the stripping agent to the stripper for a second reaction time, so as to control the reaction time of the stripping agent.

[0082] The second PH regulator is provided with a second PH value detection device (not shown in the figure), and the second PH value detection device is used to detect the PH value of the electroplating wastewater flowing into the second PH regulator.

[0083] Wherein, the second PH regulator and the second PH value detection device are respectively connected to the PLC.

[0084] The PLC is used to control the second PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the second PH regulator detected by the second PH value detection device.

[0085] The PLC is also used to control the input power of the piezoelectric ceramic converter so that the piezoelectric ceramic converter outputs a predetermined frequency.

[0086] The present application proposes a deep treatment system for special pollutants in electroplating wastewater. The deep treatment system for special pollutants in electroplating wastewater can adjust and clarify the pH value of electroplating wastewater through a pre-treatment module, make the electroplating wastewater react with reactants in the special pollutant treatment module, and can separate heavy metals in the electroplating wastewater, and readjust the pH value of the electroplating wastewater and clarify it in the post-treatment module to obtain treated electroplating wastewater. The system can effectively treat special difficult-to-degrade pollutants in electroplating wastewater, make the water quality of the treated electroplating wastewater meet the standard, greatly improve the biodegradation rate of electroplating wastewater, and lay a foundation for subsequent biological treatment.

[0087] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0088] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0089] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0090] The above description is only a preferred embodiment of the present application, and does not limit the protection scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the innovative concept of the present application, or direct / indirect application in other related technical fields are included in the protection scope of the present application.

Claims

1. A deep treatment system for special pollutants in electroplating wastewater, characterized in that: The system includes: a pre-treatment module, a special pollutant treatment module, and a post-treatment module. Wherein, the input port of the pre-treatment module is connected to the outlet of the electroplating wastewater, the output port of the pre-treatment module is connected to the input port of the special pollutant treatment module, the electroplating wastewater whose pH value is adjusted and clarified by the pre-treatment module is discharged from the output port of the special pollutant treatment module after reacting with the reactant in the special pollutant treatment module, the output port of the special pollutant treatment module is connected to the input port of the post-treatment module, the post-treatment module readjusts the pH value of the electroplating wastewater after the reaction in the special pollutant treatment module and clarifies it, and outputs the treated electroplating wastewater through the output port of the post-treatment module; The special pollutant treatment module includes an ultrasonic oxidation reactor, an extractor and a stripper, wherein the input port of the ultrasonic oxidation reactor is connected to the output port of the pre-treatment module as the input port of the special pollutant treatment module, the output port of the ultrasonic oxidation reactor is connected to the input port of the extractor, the output port of the extractor is connected to the input port of the stripper, and the output port of the stripper is connected to the input port of the post-treatment module as the output port of the special pollutant treatment module.

2. The system according to claim 1, characterized in that The pre-treatment module includes a first pH regulator and a first clarifier, Among them, the input port of the first PH regulator is connected to the outlet of the electroplating wastewater as the input port of the pretreatment module, the output port of the first PH regulator is connected to the input port of the first clarifier, and the output port of the first clarifier is connected to the input port of the special pollutant treatment module as the output port of the pretreatment module.

3. The system according to claim 2, characterized in that The post-processing module includes a second pH regulator and a second clarifier, Among them, the input port of the second pH regulator is connected to the output port of the special pollutant treatment module as the input port of the post-processing module, the output port of the second pH regulator is connected to the input port of the second clarifier, and the output port of the second clarifier is used as the output port of the post-processing module to output the treated electroplating wastewater.

4. The system according to claim 3, characterized in that The system further includes a PLC, and the first PH value detection device is provided in the first PH value regulator, and the first PH value detection device is used to detect the PH value of the electroplating wastewater flowing into the first PH value regulator. Wherein, the first PH regulator and the first PH value detection device are connected to the PLC respectively. The PLC is used to control the first PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the first PH regulator detected by the first PH value detection device.

5. The system according to claim 4, characterized in that The ultrasonic oxidation reactor is provided with a piezoelectric ceramic converter, a temperature detector and a pressure detector. Wherein, the PLC is connected to the piezoelectric ceramic converter, the temperature detector and the pressure detector respectively. The PLC is also used to control the operation of the piezoelectric ceramic converter, and to control the ultrasonic oxidation reactor according to the temperature value detected by the temperature detector and the pressure value detected by the pressure detector, so that the temperature and pressure of the ultrasonic oxidation reactor are stabilized within a preset temperature range and a preset pressure range.

6. The system according to claim 5, characterized in that The reactant addition port of the extractor is connected to the extractant addition device, and the reactant recovery port of the extractor is connected to the extractant recovery device. Wherein, the PLC is connected to the extractor, the extractant adding device and the extractant recovery device respectively. The PLC is used to control the extractor adding device to add the extractant to the extractor, and to recover the extractant to the extractant recovery device after the extractant is added to the extractor for a first reaction time, so as to control the reaction time of the extractant.

7. The system according to claim 6, characterized in that The reactant addition port of the stripper is connected to the stripping agent addition device, and the reactant recovery port of the stripper is connected to the stripping agent recovery device. Wherein, the PLC is connected to the stripper, the stripping agent adding device and the stripping agent recovery device respectively, The PLC is used to control the stripper adding device to add stripping agent to the stripper, and to recover the stripping agent to the stripping agent recovery device after adding the stripping agent to the stripper for a second reaction time, so as to control the reaction time of the stripping agent.

8. The system according to claim 6, characterized in that The second PH value detecting device is provided in the second PH value adjusting device, and the second PH value detecting device is used to detect the PH value of the electroplating wastewater flowing into the second PH adjusting device. Wherein, the second PH regulator and the second PH value detection device are connected to the PLC respectively. The PLC is used to control the second PH regulator to adjust the PH value of the electroplating wastewater according to the PH value of the electroplating wastewater flowing into the second PH regulator detected by the second PH value detection device.

9. The system according to claim 5, characterized in that The PLC is also used to control the input power of the piezoelectric ceramic converter so that the piezoelectric ceramic converter outputs a predetermined frequency.

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