Electrochemical flotation treatment device for water treatment

Abstract

The present invention discloses an electrochemical flotation treatment device for water treatment, comprising: a tank body, a water inlet is provided at the front end of the tank body, and a water outlet is provided at the rear end of the tank body; an electrode plate, the electrode plate is arranged inside the tank body; an electrolysis basket, the electrolysis basket is arranged inside the tank body and above the electrode plate, and the inside of the electrolysis basket is hollow and filled with electrolysis materials, and the electrolysis basket is provided with openings; a power supply, the positive electrode of the power supply is electrically connected to the electrolysis basket, and the negative electrode of the power supply is electrically connected to the electrode plate. The device can effectively remove impurities such as heavy metals in wastewater, and discharge electrolysis products in time to maintain the electrolysis activity of the electrolysis device, while effectively reducing the tank voltage, and the device occupies a small area and has a low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an electrochemical flotation treatment device for water treatment. Background Art

[0002] At present, electrochemical treatment is usually used at the end of non-ferrous industry wastewater. Traditional electrochemical treatment generally adopts an open electrolytic cell plus iron plate reversing electrolysis. This method is atmospheric pressure type, simple equipment, and widely used. However, this process equipment occupies a large area, has low power efficiency, low anode utilization, and the electrolyzed iron is not easy to discharge. It adheres to the plate and continues to be oxidized, losing its effectiveness.

[0003] Therefore, the existing electrochemical treatment technology suitable for wastewater in the nonferrous industry needs to be further improved. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, one purpose of the present invention is to provide an electrochemical flotation treatment device for water treatment, which can effectively remove impurities such as heavy metals in wastewater, discharge electrolysis products in time, maintain the electrolytic activity of the electrolysis device, and effectively reduce the cell voltage. The device occupies a small area and has a low cost.

[0005] In one aspect of the present invention, the present invention provides an electrochemical flotation treatment device for water treatment. According to an embodiment of the present invention, the device comprises:

[0006] A tank body, wherein a water inlet is provided at the front end of the tank body, and a water outlet is provided at the rear end of the tank body;

[0007] An electrode plate, wherein the electrode plate is arranged inside the tank body;

[0008] An electrolysis basket, which is arranged inside the tank body and above the electrode plate, and is hollow inside and filled with electrolysis materials, and is provided with openings;

[0009] A power supply, wherein the positive electrode of the power supply is electrically connected to the electrolysis basket, and the negative electrode of the power supply is electrically connected to the electrode plate.

[0010] The electrochemical flotation treatment device for water treatment according to the embodiment of the present invention is provided with an electrode plate in the tank body and the electrode plate is connected to the negative electrode of the power supply, and an electrolysis basket is provided above the electrode plate and the electrolysis basket is connected to the positive electrode of the power supply. During the electrolysis process, water around the electrode plate undergoes a reduction reaction to generate hydrogen and hydroxide ions (2H 2 O+2e - =H 2 +2OH -), the electrolytic materials generated in the electrolytic basket are continuously dissolved and combined with the hydroxide generated by the cathode to form an adsorbent, which can effectively adsorb heavy metals and other impurities in the wastewater, and the hydrogen generated by the electrode plate forms a flotation effect, so that the adsorbent adsorbing heavy metals and other impurities floats with the gas, and finally enters the aeration device from the water outlet for aeration and adsorbs heavy metals and other impurities. Therefore, the device can effectively remove heavy metals and other impurities in the wastewater, and discharge the electrolysis products in time to maintain the electrolytic activity of the electrolysis device, while effectively reducing the cell voltage, and the device occupies a small area and has a low cost.

[0011] In addition, the electrochemical flotation treatment device for water treatment according to the above embodiment of the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, the tank body is a resin tank body, a PVC tank body or a concrete tank body.

[0013] In some embodiments of the present invention, the electrode plate is mesh-shaped or porous.

[0014] In some embodiments of the present invention, the electrode plate is made of stainless steel, titanium, copper, or graphite.

[0015] In some embodiments of the present invention, the electrolysis basket is made of titanium, titanium alloy or graphite.

[0016] In some embodiments of the present invention, the electrolytic material includes at least one of pure aluminum, pure iron, pure zinc, carbon steel and iron-carbon alloy, thereby effectively removing impurities such as heavy metals in wastewater.

[0017] In some embodiments of the present invention, the electrode plate is arranged inside the tank body along a line parallel to the bottom of the tank body, and the electrode plate is arranged parallel to and spaced from the electrolytic basket. Thus, the adsorbent for adsorbing impurities such as heavy metals can float with the gas to maintain the activity of the electrolytic basket.

[0018] In some embodiments of the present invention, in the height direction of the trough body, the water inlet is arranged below the water outlet.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a schematic diagram of the longitudinal cross-section structure of an electrochemical flotation treatment device for water treatment according to one embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the top structure of an electrochemical flotation treatment device for water treatment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In one aspect of the present invention, the present invention provides an electrochemical flotation treatment device for water treatment. Figure 1 and 2 The device includes: a tank body 100, an electrode plate 200, an electrolysis basket 300 and a power source 400.

[0029] According to an embodiment of the present invention, a water inlet 101 is provided at the front end of the tank body 100, and a water outlet 102 is provided at the rear end of the tank body 100. Preferably, in the height direction of the tank body 100, the water inlet 101 is provided below the water outlet 102, that is, the wastewater enters the tank body 100 from the bottom and exits from the top, so that the wastewater enters the tank body 100 through the water inlet 101 provided at the bottom of the front section of the tank body 100 and flows through the electrode plate 200 and the electrolysis basket 300 in sequence, and then is discharged from the tank body through the water outlet 102 provided at the upper end of the rear end of the tank body 100 to enter the aeration device for aeration and adsorption of impurities such as heavy metals. According to a specific embodiment of the present invention, there is no special requirement for the material of the tank body 100, as long as it can achieve the insulation effect, such as a resin tank body, a PVC tank body or a concrete tank body.

[0030] According to an embodiment of the present invention, the electrode plate 200 is disposed inside the tank body 100. Preferably, the electrode plate 200 is arranged inside the tank body 100 along a direction parallel to the bottom of the tank body 100. During the electrolysis process, the electrode plate 200 is connected to the negative electrode of the power supply, and the surrounding water undergoes a reduction reaction to produce hydrogen and hydroxide ions (2H 2 O+2e - =H 2 +2OH - ), wherein the hydroxide ions combine with the metal ions continuously dissolved from the electrolytic material in the electrolytic basket to form an adsorbent, which can effectively adsorb impurities such as heavy metals in the wastewater, and the hydrogen generated by the electrode plate forms a flotation effect, so that the adsorbent adsorbing heavy metals and other impurities floats with the gas, thereby maintaining the electrolytic activity of the electrolytic basket.

[0031] Furthermore, the electrode plate 200 is mesh-shaped or porous. Specifically, the mesh-shaped or porous electrode plate can facilitate the flow of water, making the electrolysis process more thorough and more efficient. And the electrode plate 200 is made of stainless steel, titanium, copper, or graphite.

[0032] According to an embodiment of the present invention, the electrolytic basket 300 is arranged inside the tank body 100 and above the electrode plate 200, and the inside of the electrolytic basket 300 is hollow and filled with electrolytic materials. A second opening 31 is provided on the electrolytic basket 300. The electrolytic materials generated in the electrolytic basket are continuously dissolved and combined with the hydroxyl generated by the cathode to form an adsorbent, which can effectively adsorb impurities such as heavy metals in the wastewater, and the hydrogen generated by the electrode plate forms a flotation effect, so that the adsorbent that adsorbs impurities such as heavy metals floats with the gas, and finally enters the aeration device from the water outlet for aeration and adsorbs impurities such as heavy metals.

[0033] Specifically, the electrolysis basket 300 is a square structure with a hollow interior, and the electrolysis material is filled in the hollow structure. The electrolysis basket 300 and the electrode plate 200 are arranged parallel and spaced apart, and a plurality of openings 31 are locally provided on each surface of the electrolysis basket 300 .

[0034] Furthermore, the electrolytic basket 300 is made of titanium, titanium alloy or graphite. The electrolytic basket of this material does not undergo chemical reactions itself and has good adaptability to wastewater. In addition, the electrolytic material in the electrolytic basket 300 includes at least one of pure aluminum, pure iron, pure zinc, carbon steel and iron-carbon alloy. As a result, under the action of the positive electrode of the power supply, the electrolytic material in the substance is continuously dissolved and reacts with the cathode to generate an adsorbent, which can effectively adsorb impurities such as heavy metals in the wastewater. According to an embodiment of the present invention, the positive electrode 41 of the power supply 400 is electrically connected to the electrolytic basket 300, and the negative electrode 42 of the power supply 400 is electrically connected to the electrode plate 200. Specifically, the power supply can be a DC power supply conventionally used in the art.

[0035] The electrochemical flotation treatment device for water treatment according to the embodiment of the present invention is provided with an electrode plate in the tank body and the electrode plate is connected to the negative electrode of the power supply, and an electrolysis basket is provided above the electrode plate and the electrolysis basket is connected to the positive electrode of the power supply. During the electrolysis process, water around the electrode plate undergoes a reduction reaction to generate hydrogen and hydroxide ions (2H 2 O+2e - =H 2 +2OH -), the electrolytic materials generated in the electrolytic basket are continuously dissolved and combined with the hydroxide generated by the cathode to form an adsorbent, which can effectively adsorb heavy metals and other impurities in the wastewater, and the hydrogen generated by the electrode plate forms a flotation effect, so that the adsorbent adsorbing heavy metals and other impurities floats with the gas, and finally enters the aeration device from the water outlet for aeration and adsorbs heavy metals and other impurities. Therefore, the device can effectively remove heavy metals and other impurities in the wastewater, and discharge the electrolysis products in time to maintain the electrolytic activity of the electrolysis device, while effectively reducing the cell voltage, and the device occupies a small area and has a low cost.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An electrochemical flotation treatment device for water treatment, characterized in that: include: A tank body, wherein a water inlet is provided at the front end of the tank body, and a water outlet is provided at the rear end of the tank body; An electrode plate, wherein the electrode plate is arranged inside the tank body; An electrolysis basket, which is arranged inside the tank body and above the electrode plate, and is hollow inside and filled with electrolysis materials, and is provided with openings; A power supply, wherein the positive electrode of the power supply is electrically connected to the electrolysis basket, and the negative electrode of the power supply is electrically connected to the electrode plate; During the electrolysis process, the electrode plate is connected to the negative electrode of the power supply, and the surrounding water undergoes a reduction reaction to produce hydrogen and hydroxide ions, wherein the hydroxide ions combine with the metal ions continuously dissolved from the electrolytic materials produced in the electrolysis basket to form an adsorbent, which can effectively adsorb heavy metals in the wastewater, and the hydrogen produced by the electrode plate forms a flotation effect, so that the adsorbent adsorbing heavy metals floats with the gas, thereby maintaining the electrolytic activity of the electrolysis basket; The aeration device is provided, and the adsorbent enters the aeration device from the water outlet to be aerated and adsorb heavy metals.

2. The device according to claim 1, characterized in that The tank body is a resin tank body or a concrete tank body.

3. The device according to claim 1, characterized in that The electrode plate is in a mesh or porous shape.

4. The device according to claim 1 or 3, characterized in that: The electrode plate is made of stainless steel, titanium, copper or graphite.

5. The device according to claim 1, characterized in that The electrolysis basket is made of titanium, titanium alloy or graphite.

6. The device according to claim 1 or 5, characterized in that The electrolytic material includes at least one of pure aluminum, pure iron, pure zinc, carbon steel and iron-carbon alloy.

7. The device according to claim 1, characterized in that The electrode plate is arranged inside the tank body along a line parallel to the bottom of the tank body, and the electrode plate is parallel to and spaced from the electrolysis basket.

8. The device according to claim 1, characterized in that In the height direction of the trough body, the water inlet is arranged below the water outlet.

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