CN107447233B - Device and method for simultaneously separating and recovering multiple heavy metals in electroplating wastewater - Google Patents
Device and method for simultaneously separating and recovering multiple heavy metals in electroplating wastewater Download PDFInfo
- Publication number
- CN107447233B CN107447233B CN201710861817.1A CN201710861817A CN107447233B CN 107447233 B CN107447233 B CN 107447233B CN 201710861817 A CN201710861817 A CN 201710861817A CN 107447233 B CN107447233 B CN 107447233B
- Authority
- CN
- China
- Prior art keywords
- electroplating wastewater
- wastewater
- exchange membrane
- metal
- reaction tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/06—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese
- C25C1/08—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese of nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a device for simultaneously separating and recovering multiple heavy metals in electroplating wastewater, which comprises a device outer frame with at least one processing unit chamber, wherein each processing unit chamber is internally provided with an anode reaction tank and a cathode reaction tank, the anode reaction tank is internally provided with an anode plate, and the cathode reaction tank is internally provided with a cathode plate; a multi-layer diaphragm consisting of a cation exchange membrane and an anion exchange membrane is arranged between the anode plate and the cathode plate, a wastewater treatment channel is formed on the multi-layer diaphragm, and an electroplating wastewater inlet and an electroplating wastewater outlet are arranged on the outer frame of the device; the device is provided with a direct current power supply, the anode plate and the cathode plate are correspondingly connected with the anode and the cathode of the direct current power supply, and a metal recovery chamber is formed between the cation exchange membrane and the anion exchange membrane. The recovery method is a method in which heavy metal ions in electroplating wastewater flowing through a wastewater treatment channel are separated and recovered from the electroplating wastewater in the form of metal or alkaline compounds in a metal recovery chamber formed by separation.
Description
Technical Field
The invention relates to the technical field of environmental protection treatment of wastewater, in particular to equipment for recycling various heavy metals in electroplating wastewater, and specifically relates to a device and a method for simultaneously separating and recycling various heavy metals in electroplating wastewater.
Background
The plating industry is related to the industries of automobiles, equipment manufacturing, ships and logistics, and other industries such as steel, petrifaction, nonferrous metals and the like are related to the plating industry in many ways. The development of these industries will bring about the brand new development of the electroplating industry closely related to the industry, and at the same time, the discharge amount of electroplating wastewater will be increased or not.
The current treatment method of electroplating wastewater mainly comprises the following steps: chemical precipitation, flocculation precipitation, ion exchange, electrolysis, membrane separation, and biological methods. A great deal of practice proves that the most effective method for treating the electroplating wastewater containing copper and nickel is a chemical precipitation method, the water quantity which can be treated by the method is large, but the used medicament quantity is also large, the treatment process is troublesome, meanwhile, the pH value is required to be regulated frequently, the heavy metals in the waste liquid are difficult to recycle, and a new technical scheme is required to be further adopted for recycling the heavy metals in a great deal of high efficiency.
The prior patent number is CN201610047262, and the name is "an electroplating heavy metal recovery device" discloses an electroplating heavy metal recovery device, and the device includes the frame, and the upper portion of frame is equipped with a plurality of electrolysis trough, and the inner wall of electrolysis trough is equipped with the negative plate, is equipped with the anode plate in the electrolysis trough, concentrates waste water to a certain extent through electrochemical principle, and the rethread electrolysis is with the metal precipitation. The electrolysis adopts an independently developed micro-processing chip, is matched with a high-quality sensor, and adopts an international advanced ZGBT module to form a set of control and regulation device. The device has large specific surface area, difficult aging, long practical time and capability of effectively reducing the concentration of heavy metals in wastewater, but has relatively complicated working procedures and high manufacturing cost, and the heavy metals are mixed after being recovered and further separated.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for separating and recovering various heavy metals in electroplating wastewater simultaneously aiming at the current state of the art. The device has simple structure and reasonable design, can effectively separate and realize separate recovery of various heavy metals in electroplating wastewater, and has advanced separation and recovery method, high recovery rate and convenient operation.
The technical scheme adopted for solving the technical problems is as follows: a device for separating and recovering various heavy metals in electroplating wastewater simultaneously, or a device for separating and recovering different heavy metals in electroplating wastewater simultaneously; the device comprises a device outer frame which is provided with at least one processing unit chamber, wherein each processing unit chamber is internally provided with a reaction tank for separating and recovering heavy metals in electroplating wastewater by utilizing an electrochemical treatment mode; the reaction tank comprises an anode reaction tank and a cathode reaction tank which are formed by taking the middle branching line of the processing unit chamber as a symmetry axis in a bilateral symmetry way, an anode plate is arranged in the anode reaction tank, and a cathode plate is arranged in the cathode reaction tank; a plurality of layers of diaphragms for separating out various heavy metals on the corresponding films are arranged between the anode plate and the cathode plate, each layer of diaphragms consists of a plurality of cation exchange films and anion exchange films which are alternately arranged at intervals, a wastewater treatment channel through which electroplating wastewater can flow is formed in the center of each layer of diaphragms, and an electroplating wastewater inlet and an electroplating wastewater outlet which are connected with the wastewater treatment channel are correspondingly arranged on the outer frame of the device; the device is also provided with a direct current power supply, the anode plate is connected with the positive electrode of the direct current power supply, and the cathode plate is connected with the negative electrode of the direct current power supply; and metal recovery chambers are formed between the cation exchange membranes and the anion exchange membranes which are arranged at intervals, and heavy metal ions in electroplating wastewater flowing through the wastewater treatment channel are separated and recovered from the electroplating wastewater in the form of metal or alkaline compounds in the separated metal recovery chambers under the condition that a direct current power supply is connected.
In order to optimize the technical scheme, the measures adopted further comprise:
the multi-layer diaphragm sequentially comprises a first cation exchange membrane and a first anion exchange membrane from outside to inside in an anode reaction tank; the multi-layer diaphragm sequentially comprises a second anion exchange membrane and a second cation exchange membrane from outside to inside in a cathode reaction tank; the first anion exchange membrane and the second cation exchange membrane are symmetrically arranged by taking the middle branching line of the treatment unit chamber as a symmetry axis, and the wastewater treatment channel is formed by a channel between the first anion exchange membrane and the second cation exchange membrane.
The electroplating wastewater inlet is connected with a wastewater pump for supplying electroplating wastewater through a water inlet pipe, and a water inlet of the wastewater pump is connected with an electroplating wastewater tank through a water pumping pipe; the electroplating wastewater outlet is communicated with an electroplating wastewater pool through a drain pipe; the outer frame of the device is provided with a water outlet pipe for discharging the separated wastewater after heavy metal is separated in the metal recovery chamber.
The direct current voltage loaded by each metal recovery chamber in the reaction tank is 5V to 20V.
The electroplating wastewater is mixed electroplating wastewater containing a plurality of heavy metals, and heavy metal copper ions contained in the mixed electroplating wastewater are separated and collected in a metal recovery chamber in a metal form; heavy metal nickel ions contained in the mixed electroplating wastewater are separated and recovered in a metal recovery chamber in the form of metal and/or alkaline compounds; heavy metal chromium ions contained in the mixed electroplating wastewater are separated and recovered in the form of an alkaline compound in the metal recovery chamber.
The apparatus frame is made of foaming resin material, and two to twelve processing unit chambers are formed in the apparatus frame.
The invention also provides a method for separating and recovering various heavy metals from the electroplating wastewater simultaneously, which is a metal recovery method for separating and recovering metals from the electroplating wastewater in a form of metals or alkaline compounds in a metal recovery chamber formed in a multi-layer diaphragm by adopting an electrochemical treatment mode to enable the electroplating wastewater to flow through a wastewater treatment channel in the multi-layer diaphragm of the device.
The proton concentration of the electroplating wastewater in the metal recovery chamber is reduced by an electrodialysis method through electrochemical treatment, so that the metal in the electroplating wastewater is separated and recovered from the metal-containing waste liquid in the form of metal simple substance or alkaline compound.
The device can realize the recovery of elemental copper in the metal recovery chamber under the condition of treating the electroplating wastewater containing copper ions; in the case of an aqueous solution, when a high voltage is applied, ammonia nitrogen is used as a catalyst, and a substance having oxidizing properties for electrons to be hydrated can be formed.
When the direct current voltage applied to each metal recovery chamber for electrochemical treatment is 5V to 20V, the heavy metal ions in the complex heavy metals which are stable and difficult to separate out are separated, the complex heavy metal ions are discharged from the treatment unit chamber in a suspension mode in the treatment unit chamber or through a plurality of layers of diaphragms to the adjacent treatment unit chamber, and are recovered in the form of salt-based compounds.
Compared with the prior art, the device is provided with the multi-layer diaphragm between the anode plate and the cathode plate for separating out various heavy metals on different films at the same time even if different heavy metals are separated out, and the multi-layer diaphragm comprises a plurality of cation exchange films and anion exchange films which are alternately arranged at intervals according to different moving speeds of metal ions and different separating-out environments, so that different heavy metals can be separated out on different films at the same time. The recovery method of the present invention is a metal recovery method for separating and recovering a metal from electroplating wastewater in the form of a metal or an alkaline compound in a metal recovery chamber formed separately.
The device overcomes the defect of single treatment of the prior electroplating wastewater, can separate heavy metals in the mixed electroplating wastewater in the reaction tank, and then achieves the effect of separate recovery. Can effectively improve the treatment effect of electroplating wastewater and reduce the equipment investment cost.
Drawings
Fig. 1 is a schematic diagram of the working principle of the present invention.
Description of the embodiments
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Wherein the reference numerals are as follows: the electroplating wastewater treatment device comprises an electroplating wastewater inlet A, an electroplating wastewater outlet B, a device outer frame 1, an anode reaction tank 1a, a cathode reaction tank 1B, an anode plate 2, a cathode plate 3, a wastewater treatment channel 4a, a metal recovery chamber 4B, a first cation exchange membrane 41, a first anion exchange membrane 42, a second cation exchange membrane 43, a second anion exchange membrane 44, a direct current power supply 5, a wastewater pump 6, an electroplating wastewater tank 7 and a water outlet pipe 8.
FIG. 1 is a schematic diagram of the structure of the present invention, and as shown in the drawing, the present invention discloses a device for simultaneously separating and recovering multiple heavy metals in electroplating wastewater, or a device for simultaneously separating and recovering different heavy metals in electroplating wastewater. The device comprises a device outer frame 1 with at least one processing unit chamber formed, wherein the device outer frame 1 is made of foaming resin materials, a plurality of processing unit chambers can be formed in the device outer frame 1, the processing unit chambers are sequentially formed in the device outer frame 1 according to row and column arrangement, the processing unit chambers are arranged in a row when two or three processing unit chambers are arranged, the optimal number of the processing unit chambers is equal to four, six, eight, ten, twelve and up to n, and n is a number which is greater than twelve and can be divided by 2. The reaction tanks for separating and recovering heavy metals in electroplating wastewater by utilizing an electrochemical treatment mode are arranged in each treatment unit chamber; the reaction tank comprises an anode reaction tank 1a and a cathode reaction tank 1b which are formed in bilateral symmetry by taking a middle branching line of a processing unit chamber as a symmetry axis, wherein an anode plate 2 is arranged in the anode reaction tank 1a, and a cathode plate 3 is arranged in the cathode reaction tank 1 b; the anode plate 2 and the cathode plate 3 are symmetrically arranged by taking the middle branching line of the treatment unit chamber as a symmetrical axis, a plurality of layers of diaphragms for separating out various heavy metals on the corresponding diaphragms are arranged between the anode plate 2 and the cathode plate 3, namely, a plurality of layers of diaphragms for separating out different heavy metals on different diaphragms are arranged, the plurality of layers of diaphragms are arranged according to different layers, particularly, the plurality of layers of diaphragms are composed of a plurality of cation exchange diaphragms and anion exchange diaphragms which are alternately arranged at intervals, the center of the plurality of layers of diaphragms is provided with a wastewater treatment channel 4a for enabling electroplating wastewater to flow through, and the two ends of the outer frame 1 corresponding to the wastewater treatment channel 4a are correspondingly provided with an electroplating wastewater inlet A and an electroplating wastewater outlet B for connecting the wastewater treatment channel 4 a. The device is provided with a direct current power supply 5, the anode plate 2 is connected with the positive electrode of the direct current power supply 5, and the cathode plate 3 is connected with the negative electrode of the direct current power supply 5; a metal recovery chamber 4b is formed between the cation exchange membrane and the anion exchange membrane which are arranged at intervals, and heavy metal ions in electroplating wastewater flowing through the wastewater treatment channel 4a are separated and recovered from the electroplating wastewater in the form of metal or alkaline compounds in the separated metal recovery chamber 4b under the condition that the anode plate 2 and the cathode plate 3 of the device are communicated with a direct current power supply.
The device overcomes the defect of single treatment of the conventional electroplating wastewater, and the electroplating wastewater is mixed electroplating wastewater containing multiple heavy metals, so that the heavy metals in the mixed electroplating wastewater can be separated in the reaction tank at the same time, and then the effect of separate recovery is achieved. In the device, heavy metal copper ions contained in the mixed electroplating wastewater are separated and collected in a metal form in a metal recovery chamber; the recovery of the simple substance copper can be realized. In the case of an aqueous solution, when a high voltage is applied, ammonia nitrogen is used as a catalyst, and substances having oxidizing properties such as electrons to be hydrated can be formed.
In the device, heavy metal nickel ions contained in the mixed electroplating wastewater are separated and recovered in a metal recovery chamber in the form of metal and/or alkaline compounds; in the device, heavy metal chromium ions contained in the mixed electroplating wastewater are separated and recovered in a metal recovery chamber in the form of an alkaline compound.
The invention reduces the proton concentration in the metal recovery chamber formed by separating the diaphragm by electrodialysis, and the metal ions are separated and recovered from the electroplating wastewater in the form of metal simple substance or alkaline compound.
In the embodiment, as can be seen from fig. 1, the multi-layer membrane of the present invention is symmetrically distributed in the anode reaction tank 1a and the cathode reaction tank 1b, and the multi-layer membrane positioned in the anode reaction tank 1a sequentially comprises a first cation exchange membrane 41 and a first anion exchange membrane 42 from the outer layer to the inner layer; the multi-layer membrane positioned in the cathode reaction tank 1b sequentially comprises a second anion exchange membrane 44 and a second cation exchange membrane 43 from the outer layer to the inner layer; the first anion-exchange membrane 42 and the second cation-exchange membrane 43, and the first cation-exchange membrane 41 and the second anion-exchange membrane 44 are each disposed symmetrically about the center line of the treatment unit chamber as a symmetry axis, and the wastewater treatment passage 4a is constituted by a passage between the first anion-exchange membrane 42 and the second cation-exchange membrane 43.
In the embodiment, the electroplating wastewater inlet A of the invention is connected with a wastewater pump 6 for supplying electroplating wastewater through a water inlet pipe, and the water inlet of the wastewater pump 6 is connected with an electroplating wastewater pool 7 through a water suction pipe; the electroplating wastewater outlet B is communicated with an electroplating wastewater pool 7 through a drain pipe; the electroplating wastewater in the electroplating wastewater tank 7 is also communicated with an electroplating drain pipe of an electroplating workshop. The device outer frame 1 is provided with a water outlet pipe 8 for discharging the separated wastewater after heavy metal separation in the metal recovery chamber 4 b.
The direct current voltage loaded by each metal recovery chamber 4b in each reaction tank in the device is 5V to 20V. The invention separates the anode plate 2 and the cathode plate 3 by using a plurality of layers of diaphragms to form metal recovery chambers, and the direct current voltage loaded in each metal recovery chamber is between 5 and 20V. The separation of the complex can be achieved under the voltage conditions that the stability constant of the complex formed by the metal and the complexing agent is 5 to 7 orders of magnitude, for example, the equilibrium potential of the stability constant of 1 degree calculated by Nernst formula is 1 price, and the stability constant is 60mV and 450mV or more in the single electron reaction. The stability constant of the complex Ni etylenediaminetetracarbonate produced by Ni ions and EDTA is on the order of 10 times in the case of a neutral solution, under acidic conditions of pH1 to 3, the stability constant of these metal complexes is on the order of several times, and a voltage of several volts is sufficient.
The invention relates to a method for simultaneously separating and recovering various heavy metals in electroplating wastewater, or a method for simultaneously separating and recovering different heavy metals in electroplating wastewater, which is a metal recovery method for separating and recovering metals from electroplating wastewater in a form of metal or alkaline compounds in a metal recovery chamber 4b formed in a multi-layer diaphragm by adopting an electrochemical treatment mode to enable the electroplating wastewater flowing through a wastewater treatment channel 4a in the multi-layer diaphragm of the device.
The proton concentration of the electroplating wastewater in the metal recovery chamber 4b is reduced by an electrodialysis method by electrochemical treatment, so that the metal in the electroplating wastewater is separated and recovered from the metal-containing waste liquid in the form of a metal simple substance or an alkaline compound.
The device can realize the recovery of elemental copper in the metal recovery chamber 4b under the condition of treating the electroplating wastewater containing copper ions; in the case of an aqueous solution, when a high voltage is applied, ammonia nitrogen is used as a catalyst, and a substance having oxidizing properties for electrons to be hydrated can be formed.
When the direct current voltage applied to each metal recovery chamber for electrochemical treatment is 5V to 20V, the heavy metal ions in the complex heavy metals which are stable and difficult to separate out are separated, the complex heavy metal ions are discharged from the treatment unit chamber in a suspension mode in the treatment unit chamber or through a plurality of layers of diaphragms to the adjacent treatment unit chamber, and are recovered in the form of salt-based compounds.
The device can separate and recover various heavy metals simultaneously, has a simple structure, is practical and convenient, and can separate and recover different heavy metals in the space formed by different membrane combinations, namely, the metal recovery chamber automatically through electrolysis and precipitation treatment by the electroplating wastewater passing through the wastewater treatment channel 4a during recovery, thereby achieving the aim of separating and recovering different heavy metals in the mixed electroplating wastewater simultaneously.
While the invention has been shown and described with reference to a preferred embodiment thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the following claims.
Claims (6)
1. A device for simultaneously separating and recovering a plurality of heavy metals in electroplating wastewater, which comprises a device outer frame (1) with at least one processing unit chamber, and is characterized in that: a reaction tank for separating and recovering heavy metals in electroplating wastewater by utilizing an electrochemical treatment mode is arranged in each treatment unit chamber; the reaction tank comprises an anode reaction tank (1 a) and a cathode reaction tank (1 b) which are formed by taking the middle branching line of the processing unit chamber as the symmetry axis and are bilaterally symmetrical, an anode plate (2) is arranged in the anode reaction tank (1 a), and a cathode plate (3) is arranged in the cathode reaction tank (1 b); a plurality of layers of diaphragms for separating out various heavy metals on the corresponding diaphragms are arranged between the anode plate (2) and the cathode plate (3), each of the plurality of layers of diaphragms consists of a plurality of cation exchange diaphragms and anion exchange diaphragms which are alternately arranged at intervals, a wastewater treatment channel (4 a) through which electroplating wastewater can flow is formed in the center of each of the plurality of layers of diaphragms, and an electroplating wastewater inlet (A) and an electroplating wastewater outlet (B) which are connected with the wastewater treatment channel (4 a) are correspondingly arranged on the outer frame (1) of the device; the device is provided with a direct current power supply (5), the anode plate (2) is connected with the positive electrode of the direct current power supply (5), and the cathode plate (3) is connected with the negative electrode of the direct current power supply (5); and a metal recovery chamber (4 b) is formed between the cation exchange membrane and the anion exchange membrane which are arranged at intervals, and heavy metal ions in the electroplating wastewater flowing through the wastewater treatment channel (4 a) are separated and recovered from the electroplating wastewater in the form of metal or alkaline compounds in the separated metal recovery chamber (4 b) under the condition that the device is electrified.
2. The device for simultaneously separating and recycling a plurality of heavy metals in electroplating wastewater according to claim 1, which is characterized in that: the multi-layer diaphragm comprises a first cation exchange membrane (41) and a first anion exchange membrane (42) in the anode reaction tank (1 a) from outside to inside in sequence; the multi-layer diaphragm sequentially comprises a second anion exchange membrane (44) and a second cation exchange membrane (43) from outside to inside in a cathode reaction tank (1 b); the first anion exchange membrane (42) and the second cation exchange membrane (43) are symmetrically arranged by taking the middle branching line of the treatment unit chamber as a symmetry axis, and the wastewater treatment channel (4 a) is formed by a channel between the first anion exchange membrane (42) and the second cation exchange membrane (43).
3. The device for simultaneously separating and recovering a plurality of heavy metals in electroplating wastewater according to claim 2, which is characterized in that: the electroplating wastewater inlet (A) is connected with a wastewater pump (6) for supplying electroplating wastewater through a water inlet pipe, and a water inlet of the wastewater pump (6) is connected with an electroplating wastewater tank (7) through a water suction pipe; the electroplating wastewater outlet (B) is communicated with an electroplating wastewater pool (7) through a drain pipe; the device outer frame (1) is provided with a water outlet pipe (8) for discharging the separated wastewater after heavy metal is separated in the metal recovery chamber (4 b).
4. The device for simultaneously separating and recovering a plurality of heavy metals in electroplating wastewater according to claim 3, which is characterized in that: the direct current voltage loaded by each metal recovery chamber (4 b) in the reaction tank is 5V to 20V.
5. The device for simultaneously separating and recovering a plurality of heavy metals in electroplating wastewater according to claim 4, which is characterized in that: the electroplating wastewater is mixed electroplating wastewater containing a plurality of heavy metals, and heavy metal copper ions contained in the mixed electroplating wastewater are separated and collected in a metal recovery chamber in a metal form; the heavy metal nickel ions contained in the mixed electroplating wastewater are separated and recovered in a metal recovery chamber in the form of metal and/or alkaline compounds; the heavy metal chromium ions contained in the mixed electroplating wastewater are separated and recovered in a metal recovery chamber in the form of an alkaline compound.
6. The device for simultaneously separating and recovering a plurality of heavy metals in electroplating wastewater according to claim 5, which is characterized in that: the device outer frame (1) is made of foaming resin materials, and two to twelve processing unit chambers are formed in the device outer frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861817.1A CN107447233B (en) | 2017-09-21 | 2017-09-21 | Device and method for simultaneously separating and recovering multiple heavy metals in electroplating wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861817.1A CN107447233B (en) | 2017-09-21 | 2017-09-21 | Device and method for simultaneously separating and recovering multiple heavy metals in electroplating wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107447233A CN107447233A (en) | 2017-12-08 |
| CN107447233B true CN107447233B (en) | 2023-06-09 |
Family
ID=60498034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710861817.1A Active CN107447233B (en) | 2017-09-21 | 2017-09-21 | Device and method for simultaneously separating and recovering multiple heavy metals in electroplating wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107447233B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048050A1 (en) * | 2012-09-26 | 2014-04-03 | 兰州交通大学 | Production method of electro-depositing and refining metal chloride by membrane process and preparation method for cation selective diaphragm used therein |
| CN103880118A (en) * | 2014-03-13 | 2014-06-25 | 亿丰洁净科技江苏股份有限公司 | Wastewater treatment device for laboratory |
| CN106044965A (en) * | 2016-08-12 | 2016-10-26 | 宁波市海智材料产业创新研究院 | Apparatus for recovery heavy metals from electroplating wastewater, and recovery method thereof |
| CN207391573U (en) * | 2017-09-21 | 2018-05-22 | 宁波市海智材料产业创新研究院 | The device that various heavy separates and recovers simultaneously in a kind of electroplating wastewater |
-
2017
- 2017-09-21 CN CN201710861817.1A patent/CN107447233B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048050A1 (en) * | 2012-09-26 | 2014-04-03 | 兰州交通大学 | Production method of electro-depositing and refining metal chloride by membrane process and preparation method for cation selective diaphragm used therein |
| CN103880118A (en) * | 2014-03-13 | 2014-06-25 | 亿丰洁净科技江苏股份有限公司 | Wastewater treatment device for laboratory |
| CN106044965A (en) * | 2016-08-12 | 2016-10-26 | 宁波市海智材料产业创新研究院 | Apparatus for recovery heavy metals from electroplating wastewater, and recovery method thereof |
| CN207391573U (en) * | 2017-09-21 | 2018-05-22 | 宁波市海智材料产业创新研究院 | The device that various heavy separates and recovers simultaneously in a kind of electroplating wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107447233A (en) | 2017-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0492612B1 (en) | Electrolyzer and method of operating same | |
| Feng et al. | Removal of metal ions from electroplating effluent by EDI process and recycle of purified water | |
| US5451309A (en) | Ion exchange resin regeneration apparatus | |
| US20060219574A1 (en) | Integrated electrolytic-electrodialytic apparatus and process for recovering metals from metal ion-containing waste streams | |
| US20110042214A1 (en) | Electroregeneration apparatus and water treatment method | |
| SG189686A1 (en) | Low energy system and method of desalinating seawater | |
| US20100133115A1 (en) | Devices and methods for acid and base generation | |
| US9561471B2 (en) | Brine treatment scaling control system and method | |
| US4306946A (en) | Process for acid recovery from waste water | |
| CN101886271A (en) | Rotational-flow electrolysis method and device thereof | |
| CN106345304A (en) | Cathodic solution protection type electrodialysis device | |
| US4357220A (en) | Method and apparatus for recovering charged ions from solution | |
| CN205473106U (en) | Heavy metal tailing storehouse leachate treatment device | |
| EP2842618A1 (en) | Apparatus and method for product recovery and electrical energy generation | |
| WO2009051612A1 (en) | Electroregeneration apparatus and water treatment method | |
| EP1483212A1 (en) | Advanced electrodeionization for fluid recycling | |
| US3806436A (en) | Concentration of electrolyte from dilute washings | |
| CN101289242B (en) | Water treatment method | |
| JPH081168A (en) | Treatment method for drainage containing monovalent neutral salt | |
| CN107447233B (en) | Device and method for simultaneously separating and recovering multiple heavy metals in electroplating wastewater | |
| DE102006016688B3 (en) | Electrical deionization method for processing of rinsing waters from chemical and/or electro-chemical surface treatment of metals, comprises cleaning of metal-containing liquids by ion-exchanger along with recovery of ion-exchange material | |
| US20030089619A1 (en) | Process and apparatus for recovery of cyanide and metals | |
| CN207391573U (en) | The device that various heavy separates and recovers simultaneously in a kind of electroplating wastewater | |
| WO2004022796A1 (en) | Process and apparatus for recovery of cyanide and metals | |
| JPS5820289A (en) | Device for changing concentration of salt in liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |