Device for efficiently removing and recycling heavy metals in wastewater

Abstract

The utility model discloses a device for efficiently removing and recycling heavy metals in wastewater, which relates to the technical field of electrochemistry and comprises a device body, a constant flow pump and an electrochemical function waveform generator, the device body comprises a heavy metal wastewater solution area and an electrochemical reaction area, the heavy metal wastewater solution area is arranged above the electrochemical reaction area, the heavy metal wastewater solution area and the electrochemical reaction area are communicated through a plastic hose and a valve, and an electrode chamber is arranged in the electrochemical reaction area and composed of an anode electrode and a cathode electrode. The anode electrode and the cathode electrode are communicated with the electrochemical function waveform generator; the top end of the heavy metal wastewater solution area is communicated with a constant flow pump through a plastic hose, the lower end of the electrochemical reaction area is communicated with the constant flow pump through a plastic hose and a valve, and the constant flow pump is used for enabling a solution containing heavy metal to circularly flow through the whole device body. The device is high in mobility, convenient to operate and high in heavy metal removal and recovery efficiency, and the solution containing the heavy metal can be recycled, so that the purpose of recycling is achieved.

Description

Technical Field

[0001] The utility model relates to a device for efficiently removing and recovering heavy metals in waste water, belonging to the technical field of materials and electrochemistry. Background Art

[0002] Heavy metal pollution is a common type of soil or solution pollution. The electrochemical device itself can effectively remove heavy metals in soil and solution. It is an efficient, low-cost, and environmentally friendly remediation technology. Its principle is to use electrochemical reactions to reduce heavy metal ions into metal precipitates, thereby achieving the purpose of removing heavy metal ions.

[0003] Existing heavy metal treatment methods cannot completely remove heavy metals from soil or solution, and the solidified heavy metals are unstable. Excessive solidifying agents will have adverse effects on the physical and chemical properties of the soil or lead to secondary pollution problems, which are not suitable for removing heavy metal pollution in actual production and life. Some treatment cycles are long, the effects are slow, and the price is expensive. They are not suitable for the current urgent problem of heavy metal contaminated soil remediation and cannot achieve the purpose of resource utilization. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a heavy metal device body that can efficiently remove heavy metals in a solution and effectively recover the removed heavy metals in order to achieve efficient and low-carbon treatment of water pollution control and resource recovery of heavy metals.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] A device for efficiently removing and recovering heavy metals in wastewater comprises a device body, a constant flow pump and an electrochemical function waveform generator; the device body comprises a heavy metal wastewater solution area and an electrochemical reaction area, the heavy metal wastewater solution area is placed above the electrochemical reaction area, and the two are connected by a plastic hose and a valve; an electrode chamber is arranged in the electrochemical reaction area, the electrode chamber comprises an anode electrode and a cathode electrode, the anode electrode and the cathode electrode are connected to the function waveform generator, and the electrochemical function waveform generator can adjust the voltage parameters applied to the electrodes; the top of the heavy metal wastewater solution area is connected to the constant flow pump through a plastic hose, and the lower end of the electrochemical reaction area is connected to the constant flow pump through a plastic hose and a valve.

[0007] Preferably, the heavy metal wastewater solution area is cylindrical as a whole, with a circular cover with an opening on the top, one end of the rubber hose is inserted into the circular cover, and the other end is connected to the constant flow pump.

[0008] Preferably, the bottom of the heavy metal wastewater solution zone is funnel-shaped, and a first square baffle with a circular hole in the center is arranged between the heavy metal wastewater solution zone and the electrochemical reaction zone. The funnel-shaped bottom of the heavy metal wastewater solution zone is placed in the circular hole of the first square baffle, and support columns are arranged at the four corners below the first square baffle.

[0009] Preferably, a valve is provided at the funnel-shaped center at the bottom of the heavy metal wastewater solution area, and the valve is connected to a plastic hose. The valve is opened to allow the solution to be treated to flow into the electrochemical reaction area.

[0010] Preferably, the main body of the electrochemical reaction zone is cylindrical, with a square connecting baffle on the top and a connecting base at the base; the support column is used to connect the first square baffle and the connecting baffle, and the connecting base located on the base is provided with screws for fixing the cylindrical area on the electrode chamber.

[0011] Preferably, the electrode chamber consists of a second square baffle with a groove located at the center of the bottom, an anode electrode, a cathode electrode and a rubber gasket, the anode electrode is located at the top and the cathode electrode is located at the bottom, the edges of the two electrodes are separated by a rubber gasket made of insulating waterproof material, and a circular hole for liquid circulation is provided in the center of the two electrodes.

[0012] Preferably, the gap between the two electrodes is 0.5-1.0 cm.

[0013] Preferably, four cylindrical support columns are arranged at the four corners of the bottom of the second square baffle with grooves to support the entire rinsing device.

[0014] Preferably, the second square baffle with a groove has a funnel-shaped groove, and the lower end of the groove is connected to a plastic hose through a valve (4) and communicates with a constant flow pump.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The heavy metal removal and recovery process of the utility model is simple, the heavy metal recovery cost is low, and the industrialization potential is strong. The utility model realizes the resource utilization of hazardous wastes, and reduces heavy metals to a single substance state, which not only reduces the toxicity of ionic heavy metals and reduces their mobility, but also provides convenience for the resource utilization of heavy metals. In addition, the device has a short treatment cycle, quick results, and is not prone to secondary pollution, so it is suitable for actual hazardous waste treatment and pollution problems. At the same time, heavy metals can be recycled and reused, creating economic benefits while controlling pollution, turning waste into treasure, and is suitable for the hazardous waste treatment market of various types of heavy metal-contaminated industrial wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The utility model is a general schematic diagram of a device for efficiently removing and recovering heavy metals in wastewater.

[0019] Figure 2 It is an exploded view of the device body of the utility model.

[0020] Figure 3 It is a schematic diagram of the overall structure of the device body of the utility model.

[0021] Figure 4 This is a schematic diagram of the electrode chamber structure of the utility model.

[0022] Wherein: 1-top hole cover, 2-porous filter plate, 3-heavy metal wastewater solution area, 4-valve, 5-first square baffle, 6-support column, 7-hole cover, 8-electrochemical reaction area, 81-connecting baffle, 82-connecting base, 9-screw; 10-rubber gasket, 11-second square baffle with groove, 111-anode electrode, 112-cathode electrode; 100-device body; 200-constant current pump; 300-electrochemical function waveform generator. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The purpose of the utility model is to provide a device for efficiently removing and recovering heavy metals in wastewater, so as to solve the problems existing in the prior art, realize the resource utilization of hazardous wastes, and reduce heavy metals to a single substance state, which not only reduces the toxicity of ionic heavy metals and reduces their mobility, but also provides convenience for the resource utilization of heavy metals. In addition, the system has a short treatment cycle, quick results, and is not prone to secondary pollution, so it is suitable for actual hazardous waste treatment and pollution problems. At the same time, heavy metals can be recycled and reused, creating economic benefits while controlling pollution, turning waste into treasure, and is suitable for various heavy metal-contaminated industrial sites and industrial wastewater hazardous waste treatment markets.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, this embodiment provides a device for efficiently removing and recovering heavy metals in wastewater, including a device body 100, a heavy metal wastewater solution area 3, an electrochemical reaction area 8, an electrochemical function waveform generator 300, and a constant flow pump 200. The body of the device body 100 is made of acrylic plastic. The upper end of the heavy metal wastewater solution area 3 is connected to the constant flow pump 200 by a plastic hose. The heavy metal wastewater solution area 3 is placed above the electrochemical reaction area 8, and the two are connected by a plastic hose and a valve 4. The electrochemical reaction area 8 is provided with The electrode chamber is composed of a second square baffle 11 with a groove, an anode electrode 111, a cathode electrode 112 and a rubber gasket 10. The anode electrode 111 and the cathode electrode 112 are connected to the function waveform generator 300. The electrochemical function waveform generator 300 can adjust the voltage parameters applied to the electrodes. The lower end of the electrochemical reaction zone 8 is connected to the constant flow pump 200 through a plastic hose and a valve 4. The constant flow pump 200 can circulate the solution containing heavy metals through the entire device body 100.

[0028] Each part of the device body 100 is supported and connected by four support columns 6 in the middle and separated by a first square baffle 5. The heavy metal wastewater solution area 3 is cylindrical as a whole, with a circular cover 1 with an opening on the top, which is connected to one end of a constant flow pump 200 by a rubber hose. The heavy metal-containing solution to be treated is added into the device from the top by opening the circular cover 1. The bottom of this area is funnel-shaped, with a liquid valve 4 in the center, connected to a plastic hose. When the liquid valve 4 is opened, the solution to be treated can flow into the electrochemical reaction area 8 along the plastic hose.

[0029] The electrochemical reaction zone 8 is a hollow cylinder with a base having six screw holes, and is located below the heavy metal wastewater solution zone 3, and is connected to the heavy metal wastewater solution zone 3 by the above-mentioned plastic hose and four surrounding support columns 6. The top of the zone is provided with a connecting baffle 81 connected to a portion of the square, and the base is provided with a connecting base 82, and the connecting base 82 is provided with six screw holes for screwing the screws 9, which are used to connect the hollow cylinder and the electrode chamber as a whole.

[0030] Before starting the treatment, install the electrode sheet in the electrode chamber, the upper electrode is connected to the positive pole of the transformer of the electrochemical function waveform generator, acting as an anode, and the lower electrode is connected to the negative pole of the transformer of the electrochemical function waveform generator, acting as a cathode. The edges of the two electrodes are separated by an insulating waterproof material rubber gasket 10, and there is a gap of 0.5-1.0 cm between the two electrodes in the working area. After installation, tighten the six screws 9 to fix the electrode sheet between the connection base 82 and the square bottom baffle. The removal and recovery of heavy metals by the electrode sheet can be adjusted by adjusting the frequency, duty cycle, waveform, positive and negative pressure of the electrochemical function waveform generator.

[0031] The square bottom baffle at the lower end of the electrode chamber has four cylindrical support columns 6 for supporting the entire device. The lower end of the square bottom baffle is provided with a funnel connected to a liquid valve 4. The solution surrounding the two electrodes is connected to the other end of a constant flow pump through the valve 4 and a plastic hose. The constant flow pump 200 can control the flow rate of the liquid in the device so that the solution in the device circulates through the entire device to achieve multiple cycles of removal.

[0032] Example 2

[0033] In this embodiment, heavy metals in the solution are taken as an example. The electrode sheet is trimmed into two circular electrodes according to the inner diameter of the electrode chamber, and the electrodes are installed in the electrode chamber between the lower end of the electrochemical reaction zone and the bottom table with the support column. The upper circular anode electrode 111 is connected to the positive pole of the function waveform generator 300, and the lower cathode circular electrode 112 is connected to the negative pole of the function waveform generator 300. The two electrodes are separated by an insulating waterproof material rubber gasket 10. There is a gap of 0.5-1.0 cm between the two electrodes in the processing working area. The electrode chamber is fixed between the lower end of the electrochemical reaction zone 8 and the bottom table with the support column with screws to complete the installation of the electrode chamber.

[0034] Remove the porous filter plate 2, connect the positive and negative electrodes to the electrochemical function waveform generator 300, and set various electrochemical parameters of the electrochemical function waveform generator 300; add the solution containing heavy metals to the heavy metal wastewater solution area 3, start the waveform generator 300, and apply the above-mentioned direct current on both sides of the stainless steel mesh of the electrode base during the elution process. The rest of the operation method is the same as that of Example 1; after a period of elution reaction, remove the positive and negative electrodes, and a large amount of electrochemical deposits of heavy metals are attached to the surface of the negative electrode. Most of the deposits can be recovered by washing with deionized water, and the remaining small amount of heavy metals located inside the filter electrode can be washed with low-concentration nitric acid to achieve recovery. Samples are taken intermittently during the reaction process to test the concentration changes of heavy metals in the solution to observe the removal efficiency.

[0035] The electrochemical function waveform generator is a commercially available one, such as the Puyuan RIGOL function arbitrary waveform generator DG1022Z purchased from Beijing Puyuan Jingdian Technology Co., Ltd., a square wave pulse signal source with a maximum output power of 25MHz. The series function / generator is a multifunctional signal generator that integrates the functions of a function generator, an arbitrary waveform generator, a noise generator, a pulse generator, a harmonic generator, an analog / digital modulator, a frequency meter, etc.

[0036] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A device for efficiently removing and recovering heavy metals from wastewater, characterized in that: It comprises a device body (100), a constant current pump (200) and an electrochemical function waveform generator (300); The device body (100) comprises a heavy metal wastewater solution area (3) and an electrochemical reaction area (8), wherein the heavy metal wastewater solution area (3) is placed above the electrochemical reaction area (8), and the two are connected by a plastic hose and a valve (4); an electrode chamber is arranged in the electrochemical reaction area (8), and the electrode chamber comprises an anode electrode (111) and a cathode electrode (112), and the anode electrode (111) and the cathode electrode (112) are connected to the function waveform generator (300), and the electrochemical function waveform generator (300) can adjust the voltage parameters applied to the electrodes; the top of the heavy metal wastewater solution area (3) is connected to a constant flow pump (200) through a plastic hose, and the bottom of the electrochemical reaction area (8) is connected to the constant flow pump (200) through a plastic hose and a valve (4).

2. The device for efficiently removing and recovering heavy metals in wastewater according to claim 1, characterized in that: The heavy metal wastewater solution area (3) is cylindrical in shape as a whole, and has a circular cover (1) with an opening on the top. One end of the rubber hose is inserted into the circular cover (1), and the other end is connected to the constant flow pump (200).

3. The device for efficiently removing and recovering heavy metals in wastewater according to claim 1, characterized in that: The bottom of the heavy metal wastewater solution area (3) is funnel-shaped, and a first square baffle (5) with a circular hole in the center is arranged between the heavy metal wastewater solution area (3) and the electrochemical reaction area (8). The funnel-shaped bottom of the heavy metal wastewater solution area (3) is placed in the circular hole of the first square baffle (5), and support columns (6) are arranged at the four corners below the first square baffle (5).

4. The device for efficiently removing and recovering heavy metals in wastewater according to claim 3 is characterized in that: A valve (4) is provided at the funnel-shaped center at the bottom of the heavy metal wastewater solution area (3). The valve (4) is connected to a plastic hose. The valve (4) is opened to allow the solution to be treated to flow into the electrochemical reaction area (8).

5. The device for efficiently removing and recovering heavy metals in wastewater according to claim 3, characterized in that: The electrochemical reaction zone (8) is cylindrical in shape, with a square connecting baffle (81) on its top and a connecting base (82) at its base; the support column (6) is used to connect the first square baffle (5) and the connecting baffle (81), and the connecting base (82) located on the base is provided with screws (9) for fixing the cylindrical area on the electrode chamber.

6. The device for efficiently removing and recovering heavy metals in wastewater according to claim 1, characterized in that: The electrode chamber is composed of a second square baffle (11) with a groove at the center of the bottom, an anode electrode (111), a cathode electrode (112) and a rubber gasket (10), wherein the anode electrode (111) is located at the top and the cathode electrode (112) is located at the bottom, the edges of the two electrodes are separated by a rubber gasket (10) made of an insulating waterproof material, and a circular hole for liquid circulation is provided at the center of the two electrodes.

7. The device for efficiently removing and recovering heavy metals in wastewater according to claim 6, characterized in that: The gap between the two electrodes is 0.5-1.0 cm.

8. The device for efficiently removing and recovering heavy metals in wastewater according to claim 6, characterized in that: Four cylindrical support columns (6) are arranged at the four corners of the bottom of the second square baffle (11) with grooves, for supporting the entire rinsing device.

9. The device for efficiently removing and recovering heavy metals in wastewater according to claim 8, characterized in that: The second square baffle (11) with a groove has a funnel-shaped groove, and the lower end of the groove is connected to a plastic hose through a valve (4) and communicates with a constant flow pump (200).

Images