An electrocoagulation wastewater treatment equipment

Abstract

The present invention provides an electric flocculation wastewater treatment device, which relates to the technical field of wastewater treatment. The treatment device comprises: a box, a cathode, a pseudo cathode, an anode, a pseudo anode and a radio frequency source; wherein the outer side of the box is grounded, and an insulating layer is provided on the inner wall of the box; the anode and the pseudo cathode work at a first time; the cathode and the pseudo anode work at a second time; and the radio frequency source works at a first time and a second time. In the present invention, the pseudo anode and the pseudo cathode are used to attract hydroxide and metal ions in the electrolytic wastewater to the coagulation zone, and under the action of the radio frequency source, the wastewater is rapidly flocculated, thereby improving the coagulation effect and reducing the cathode passivation, and the wastewater has a wide range of applications in the chemical industry and environmental protection fields.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to an electric flocculation wastewater treatment device. Background Art

[0002] Electrocoagulation technology refers to the process in which, under the action of an external current, metal electrodes undergo an oxidation reaction at the anode to dissolve metal ions, and a reduction reaction at the cathode to generate hydroxide and hydrogen. The metal ions form metal hydroxides through hydrolysis and polymerization in water, and the flocculation and adsorption of flocs and the flotation of gases are used to remove metals, phosphorus, suspended solids and biodegradable pollutants (such as humic acid, etc.) in the water. Electrocoagulation technology has the characteristics of wide pollutant removal range, no need to add chemical agents, reduced secondary pollution, simple equipment and process, and easy automation. It also has the advantages of energy saving, environmental protection and economic benefits, which has attracted widespread attention in recent years.

[0003] In the process of electrolysis or electrocoagulation to treat wastewater, cathode passivation is caused by the reaction of metal cations with hydroxide on the cathode surface to form a passivation film. After the passivation film is formed, it will affect the electrolysis and electrocoagulation reactions and the continuous production. At the same time, the passivation layer is difficult to remove. Therefore, in order to prevent the passivation of the electrode during the wastewater treatment process and reduce the treatment effect of the wastewater, there is an urgent need for a device that can prevent the cathode passivation during the electrolysis of wastewater, thereby improving the treatment efficiency of the wastewater. Summary of the invention

[0004] The purpose of the present invention is to provide an electrocoagulation wastewater treatment device to solve the problem of electrode passivation in the wastewater treatment process in the prior art, thereby reducing the wastewater treatment effect.

[0005] To achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows:

[0006] In a first aspect, the present invention provides an electro-flocculation wastewater treatment device, the treatment device comprising: a housing, a cathode, a pseudo-cathode, an anode, a pseudo-anode and a radio frequency source;

[0007] The outer side of the box is grounded, and an insulating layer is provided on the inner wall of the box; the anode and the pseudo cathode work at a first time; the cathode and the pseudo anode work at a second time; and the RF source works at the first time and the second time.

[0008] Optionally, the cathode includes at least one of iron, aluminum, stainless steel, graphite and titanium; and the cathode is connected to an external first power source.

[0009] Optionally, the anode includes at least one of iron, aluminum, magnesium, copper, zinc and titanium; the anode is connected to an external second power supply; wherein the first power supply and the second power supply are both pulse power supplies.

[0010] Optionally, the first power supply is a negative voltage DC power supply, and the second power supply is a positive voltage DC power supply.

[0011] Optionally, both the dummy cathode and the dummy anode are porous metal meshes, and the dummy cathode is connected to a third power supply, and the dummy anode is connected to a fourth power supply.

[0012] Optionally, the third power supply is a negative voltage DC power supply, and the fourth power supply is a positive voltage DC power supply.

[0013] The beneficial effects of the present invention are as follows: the present invention provides an electro-flocculation wastewater treatment device, which relates to the technical field of wastewater treatment, and the treatment device comprises: a box, a cathode, a pseudo-cathode, an anode, a pseudo-anode and a radio frequency source; wherein the outer side of the box is grounded, and an insulating layer is provided on the inner wall of the box; the anode and the pseudo-cathode work at a first time; the cathode and the pseudo-anode work at a second time; and the radio frequency source works at the first time and the second time. That is to say, the pseudo-anode and pseudo-cathode are used in the present invention to attract hydroxide and metal ions in the electrolyzed wastewater to the coagulation zone, and under the action of the radio frequency source, flocculation is achieved quickly, thereby improving the coagulation effect and reducing cathode passivation, and the device has a wide range of applications in the chemical industry and environmental protection fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention 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.

[0015] Figure 1 A schematic diagram of the structure of an electrocoagulation wastewater treatment device provided in one embodiment of the present invention;

[0016] Illustration: 1- cabinet, 2- first power supply, 3- third power supply, 4- fourth power supply, 5- second power supply and 6- RF source. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Figure 1This is a schematic diagram of the structure of an electrocoagulation wastewater treatment device provided by an embodiment of the present invention. Figure 1 , the electric flocculation wastewater treatment equipment provided by the embodiment of the present invention is described in detail.

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0026] Electrocoagulation technology: refers to the process in which metal electrodes, under the action of an external current, undergo oxidation reactions at the anode to dissolve metal ions, and reduction reactions at the cathode to generate hydroxide and hydrogen. Metal ions are hydrolyzed and polymerized in water to form metal hydroxides. The flocculation and adsorption of flocs and the flotation of gases are used to remove metals, phosphorus, suspended solids, and biodegradable pollutants (such as humic acid, etc.) in the water. Electrodes are usually made of relatively cheap materials such as iron and aluminum. Compared with other technologies, electrocoagulation technology has the characteristics of wide range of pollutant removal, no need to add chemical agents, reduced secondary pollution, simple equipment and process, and easy automation. It also has the advantages of energy saving, environmental protection, and economic benefits, which has attracted widespread attention in recent years.

[0027] The embodiment of the present invention provides an electrocoagulation wastewater treatment device, Figure 1 , the electrocoagulation wastewater treatment equipment is introduced in detail.

[0028] The wastewater treatment equipment in this embodiment includes: a box 1, a cathode, a pseudo-cathode, an anode, a pseudo-anode and a radio frequency source 6; wherein, the outer side of the box 1 is grounded, and an insulating layer is provided on the inner wall of the box 1; the anode and the pseudo-cathode work at a first time; the cathode and the pseudo-anode work at a second time; the radio frequency source 6 works at the first time and the second time.

[0029] It should be noted that during the operation of the device, the second power supply 5 and the third power supply 3 can be turned on at TI, so that the anode and the cathode work, and the metal ions generated by the anode move to the vicinity of the pseudo cathode under the action of the radio frequency source, and the first power supply 2 and the fourth power supply 4 can be turned on at T2, so that the cathode and the anode work, and the hydroxide ions generated by the cathode move to the vicinity of the pseudo anode under the action of the radio frequency source. Alternatively, the first power supply 2 and the fourth power supply 4 can be turned on at T1, so that the cathode and the pseudo anode work, so that the hydroxide ions generated by the cathode move to the vicinity of the pseudo anode under the action of the radio frequency source, and the second power supply 5 and the third power supply 3 can be turned on at T2, so that the anode and the pseudo cathode work, and the metal ions generated by the anode move to the vicinity of the pseudo cathode under the action of the radio frequency source, and the metal ions and hydroxide ions coagulate in the coagulation zone under the action of the radio frequency source. Through the alternating operation of the electrode and the power supply, the hydroxide and metal ions are attracted to the coagulation zone, and are rapidly flocculated under the action of the radio frequency, thereby avoiding cathode passivation and improving the treatment efficiency of wastewater.

[0030] It should be noted that in this embodiment, the working time T1 of the anode and the pseudo-cathode is equal to the working time T2 of the cathode and the pseudo-anode, and each working time is one hour. The above operation can be repeated many times during the implementation process, that is, the wastewater is circulated and treated once every two hours. The wastewater is circulated and treated through the alternating work of the electrodes, so that the harmful substances in the wastewater are treated more thoroughly, thereby improving the wastewater treatment efficiency.

[0031] The electrocoagulation treatment equipment in the embodiment described in the present application can be connected to a water quality monitor to detect the degree of wastewater treatment. When the content of toxic and harmful substances in the wastewater reaches the discharge standard, the circulation of the electrodes of the electrocoagulation wastewater treatment unit can be stopped and the wastewater that meets the standard can be discharged.

[0032] Specifically, the cathode includes at least one of iron, aluminum, stainless steel, graphite and titanium; the cathode is connected to an external first power supply 2; the anode includes at least one of iron, aluminum, magnesium, copper, zinc and titanium; the anode is connected to an external second power supply 5; wherein the first power supply and the second power supply 5 are both pulse power supplies.

[0033] Furthermore, the first power supply 2 is a negative voltage DC power supply, and the second power supply 5 is a positive voltage DC power supply; the pseudo cathode and the pseudo anode are both porous metal meshes, and the pseudo cathode is connected to the third power supply 3, and the pseudo anode is connected to the fourth power supply; the third power supply is a negative voltage DC power supply, and the fourth power supply 4 is a positive voltage DC power supply.

[0034] In the embodiment of the present invention, the cathode in the embodiment of the present invention can be selected from at least one of iron, aluminum, copper, stainless steel, graphite, and titanium; the cathode is connected to an external first power source 2.

[0035] The anode in the embodiment of the present invention can be made of at least one of iron, aluminum, magnesium, copper, zinc and titanium. The anode is connected to an external second power source 5. Both the first power source 2 and the second power source 5 are pulse power sources.

[0036] In the embodiment of the present invention, the first power supply is a negative voltage DC power supply, and the second power supply is a positive voltage DC power supply.

[0037] In the embodiment of the present invention, the dummy anode and the dummy cathode are both porous metal meshes, and the dummy cathode is connected to the third power source 3 , and the dummy anode is connected to the fourth power source 4 .

[0038] In the embodiment of the present invention, the third power supply 3 is a negative voltage DC power supply, and the fourth power supply is a positive voltage DC power supply.

[0039] It should be noted that in the embodiment of the present invention, the anode and the pseudo-cathode work at the first time, the anode is connected to the external second power supply 5, the second power supply is a positive voltage power supply, and the pseudo-cathode is connected to the third power supply 3, and the third power supply 3 is a negative voltage DC power supply. Therefore, when the anode and the pseudo-cathode are working in the T1 time period, a complete electrolysis circuit can be formed to ensure that the anode produces metal ions, and under the action of the radio frequency source, the cations produced by the anode move near the pseudo-cathode. Similarly, when the cathode and the pseudo-anode are working in the T2 time period, a complete electrolysis circuit can also be formed, so that the hydroxide ions produced by the cathode move near the pseudo-anode. Under the action of the radio frequency source, metal ions and hydroxide ions are attracted to the coagulation zone, and quickly flocculate in the coagulation zone, thereby improving the coagulation effect and reducing the passivation phenomenon of the cathode.

[0040] The present invention provides an electro-flocculation wastewater treatment device, the treatment device comprising: a box, a cathode, a pseudo-cathode, an anode, a pseudo-anode and a radio frequency source; wherein the outer side of the box is grounded, and an insulating layer is provided on the inner wall of the box; the anode and the pseudo-cathode work at a first time; the cathode and the pseudo-anode work at a second time; and the radio frequency source works at the first time and the second time. That is, the pseudo-anode and the pseudo-cathode are used in the present invention to attract hydroxide and metal ions in the electrolyzed wastewater to the coagulation zone, and under the action of the radio frequency source, flocculation is achieved quickly, thereby improving the coagulation effect and reducing cathode passivation, and the present invention has a wide range of applications in the chemical industry and environmental protection fields.

[0041] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0042] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0043] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), disk or optical disk and other media that can store program codes.

Claims

1. An electrocoagulation wastewater treatment device, characterized in that: The processing equipment includes: a box, a cathode, a pseudo-cathode, an anode, a pseudo-anode and a radio frequency source; wherein the outer side of the box is grounded, and an insulating layer is provided on the inner wall of the box; the cathode, pseudo-cathode, pseudo-anode and anode are arranged in sequence from left to right in the box; the cathode includes at least one of iron, aluminum, stainless steel, graphite and titanium, and the cathode is connected to an external first power supply; the anode includes at least one of iron, aluminum, magnesium, copper, zinc and titanium; the anode is connected to an external second power supply; both the first power supply and the second power supply are pulse power supplies; the anode and the pseudo-cathode work at a first time; the cathode and the pseudo-anode work at a second time, and the radio frequency source works at the first time and the second time.

2. The electrocoagulation wastewater treatment equipment according to claim 1, characterized in that: The first power supply is a negative voltage DC power supply, and the second power supply is a positive voltage DC power supply.

3. The electrocoagulation wastewater treatment equipment according to claim 1, characterized in that: The dummy cathode and the dummy anode are both porous metal meshes, and the dummy cathode is connected to a third power source, and the dummy anode is connected to a fourth power source.

4. The electrocoagulation wastewater treatment equipment according to claim 3, characterized in that: The third power supply is a negative voltage DC power supply, and the fourth power supply is a positive voltage DC power supply.

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