CN116081781A - High-voltage cathode electro-Fenton catalytic oxidation sewage treatment device - Google Patents
High-voltage cathode electro-Fenton catalytic oxidation sewage treatment device Download PDFInfo
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- CN116081781A CN116081781A CN202310354064.0A CN202310354064A CN116081781A CN 116081781 A CN116081781 A CN 116081781A CN 202310354064 A CN202310354064 A CN 202310354064A CN 116081781 A CN116081781 A CN 116081781A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention provides a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device, which comprises: the device comprises an upper seal head, a lower seal head and a processing unit. The upper seal head is detachably arranged at the top of the processing unit, and the lower seal head is detachably arranged at the bottom of the processing unit. The processing unit includes at least one electrode assembly, the electrode assembly including: the device comprises a cathode plate, an anode plate and two isolation plates, wherein the two isolation plates are respectively and detachably arranged at the upper end and the lower end of the cathode plate, and an activated carbon felt loaded with noble metal oxide is arranged between the isolation plates and the cathode plate. The anode plate is arranged below the cathode plate, and the anode plate is detachably connected with a separation plate arranged at the lower end of the cathode plate. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device can improve the treatment efficiency and the treatment capacity of the wastewater.
Description
Technical Field
The invention belongs to the field of sewage treatment equipment, and particularly relates to a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device.
Background
In the prior art, when industrial wastewater containing refractory organic matters is treated, workers can degrade the organic matters by adopting electrocatalytic oxidation equipment, so that the aim of cleaning the wastewater is fulfilled. When the electrocatalytic oxidation device works, the organic matters attached to the surface of the anode plate can be oxidized under the action of an electric field, electrons can be released through the cathode plate and absorbed through the anode plate, so that oxygen in water is converted into hydroxyl free radicals with strong oxidizing property, chloride ions are converted into hypochlorite with strong oxidizing property, and then the organic matters in water are oxidized.
However, the existing electrocatalytic oxidation equipment usually operates under normal pressure, and because the amount of oxygen dissolved in water is low, a large amount of hydroxyl radicals cannot be generated near the polar plate of the electrocatalytic oxidation equipment, and the wastewater treatment capacity is directly affected. Secondly, the interval between the cathode plate and the anode plate in the traditional electrocatalytic oxidation equipment is larger, so that the mass transfer effect between the adjacent anode plates is poor, and organic matters in water cannot be efficiently oxidized, so that the working efficiency of wastewater treatment is reduced.
Disclosure of Invention
In view of the above, the invention aims to provide a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device so as to achieve the purposes of improving the wastewater treatment capacity of electro-catalytic oxidation equipment and improving the wastewater treatment efficiency.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device, comprising: the device comprises an upper sealing head, a lower sealing head and a processing unit, wherein the upper sealing head is detachably arranged at the top of the processing unit, a discharging pipe group is arranged on the upper sealing head, the lower sealing head is detachably arranged at the bottom of the processing unit, and an aeration assembly and a liquid inlet pipe are arranged on the lower sealing head; the processing unit includes at least one electrode assembly including: a cathode plate, an anode plate and two separation plates; the cathode plate is provided with a first flow opening, a cathode metal net is arranged in the first flow opening, and a cathode terminal is arranged on the side wall of the cathode plate; the two isolation plates are respectively and detachably arranged at the upper end and the lower end of the cathode plate, and an active carbon felt loaded with noble metal oxide is arranged between the isolation plates and the cathode plate; the isolation plate is provided with a second flow opening which is opposite to the first flow opening, and an isolation grid is arranged in the second flow opening; the anode plate is arranged below the cathode plate and is detachably connected with a separation plate arranged at the lower end of the cathode plate; the anode plate is provided with a third flow opening which is opposite to the second flow opening, an anode metal net is arranged in the third flow opening, and an anode terminal is arranged on the side wall of the anode plate.
Further, when the processing unit includes a plurality of electrode assemblies, the plurality of electrode assemblies are sequentially spliced in the height direction.
Further, the aperture ratio of the cathode metal net is larger than that of the anode metal net.
Further, a plurality of containing holes are formed in the cathode plate, the containing holes are annularly arranged on the periphery of the first flow opening, and a connecting screw rod is arranged in each containing hole; the separation plate and the anode plate are respectively provided with a first connecting hole for accommodating the connecting screw rod, and the upper seal head and the lower seal head are respectively provided with a second connecting hole for accommodating the connecting screw rod; and two limit nuts are further arranged on the connecting screw, the bottom end of one limit nut is propped against the top surface of the upper seal head, and the top end of the other limit nut is propped against the bottom surface of the lower seal head.
Further, the inner diameter of the first flow opening and the inner diameter of the second flow opening are equal to the inner diameter of the third flow opening, and the outer diameter of the noble metal oxide-loaded activated carbon felt is equal to the inner diameter of the first flow opening.
Further, the thickness of the cathode metal net is smaller than that of the cathode plate, and the thickness of the anode metal net is smaller than that of the anode plate.
Further, the upper end face and the lower end face of the cathode plate are respectively provided with a first sealing ring groove, and the inner diameter of each first sealing ring groove is larger than the inner diameter of the first flow opening; the upper end face and the lower end face of the isolation plate are respectively provided with a second sealing ring groove, the second sealing ring grooves are aligned with the first sealing ring grooves, and the inner diameter of each second sealing ring groove is larger than that of each second flow opening; and the upper end surface and the lower end surface of the anode plate are respectively provided with a third sealing ring groove, the third sealing ring grooves are aligned with the second sealing ring grooves, and the inner diameter of the third sealing ring grooves is larger than the inner diameter of the third flow opening.
Further, the discharge tube group includes: the pressure measuring device comprises a blow-down pipe, a pressure measuring pipe and a pressure relief pipe, wherein the blow-down pipe is provided with a blow-down valve, the pressure measuring pipe is provided with a pressure gauge, and the pressure relief pipe is provided with a safety valve.
Further, the aeration assembly comprises an aeration disc and an aeration pipe, wherein the aeration pipe is arranged in a preset mounting hole on the lower sealing head, the aeration disc is positioned on one side of the lower sealing head, which is close to the treatment unit, a plurality of aeration holes are formed in the aeration disc, and the aeration disc is communicated with the aeration pipe.
Furthermore, the cathode plate and the anode plate are both made of metallic titanium, and noble metal oxide coatings coated by a sintering method are arranged on the cathode plate and the anode plate; the isolation plate is made of elastic insulating materials; the active carbon felt loaded with the noble metal oxide takes an active carbon fiber felt as a carrier, and the noble metal oxide is loaded by a gel method.
Compared with the prior art, the high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device has the following advantages:
(1) The invention creates the high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device, and the electrode assembly comprises the cathode plate, the anode plate and the isolation plate which are detachably connected, and the cathode plate and the anode plate are separated only through the isolation plate, so that compared with the traditional electro-catalytic oxidation device, the device has smaller distance between the adjacent polar plates, thereby obtaining better mass transfer effect and improving the oxidation treatment efficiency of the wastewater. Secondly, splice between negative plate, anode plate and the division board can replace traditional catalytic oxidation equipment's casing, consequently can make this device adapt to higher operating pressure, conveniently lets in more oxygen in wastewater treatment process to make the nearby more hydroxyl free radicals that produce of negative plate, improve the throughput of waste water. In addition, the device is provided with the cathode metal net and the anode metal net on the cathode plate and the anode plate respectively, so that the current transmission efficiency can be improved and the water flow resistance can be reduced when the device works, thereby improving the wastewater treatment effect and reasonably reducing the energy consumption.
(2) The invention provides a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device, wherein an active carbon felt loaded with noble metal oxide is arranged between a separation plate and a cathode plate. When the device works, the problem that the occupation volume of the traditional granular catalyst is overlarge can be avoided by the active carbon felt loaded with noble metal oxide, so that the interval between the cathode plate and the anode plate is reduced, the tank voltage is greatly reduced, and the running power consumption of the device is further reduced.
(3) The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device provided by the invention replaces the shell structure of the traditional electro-catalytic oxidation equipment by the splicing structure of the upper end socket, the treatment unit and the lower end socket, so that the whole volume of the device can be reduced, and the splicing number of electrode assemblies can be conveniently adjusted by staff according to wastewater treatment requirements, so that the device is suitable for different working requirements.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute an undue limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to an embodiment of the invention;
fig. 3 is a schematic structural view of an upper seal head and a lower seal head according to an embodiment of the present invention;
FIG. 4 is an exploded view of an electrode assembly according to an inventive embodiment of the present invention;
reference numerals illustrate:
1-an upper seal head; 11-blow-down pipe; 111-a blow-down valve; 12-pressure measuring tube; 121-a pressure gauge; 13-a pressure relief tube; 131-a safety valve; 2-a lower end socket; 21-a liquid inlet pipe; 22-an aeration disc; 23-aeration pipe; 3-a cathode plate; 31-cathode metal mesh; 32-cathode terminal; 33-a first sealing ring groove; 4-a separator; 41-an isolation grid; 42-a second seal ring groove; 5-anode plate; 51-anode metal mesh; 52-an anode terminal; 53-a third sealing ring groove; 6-activated carbon felt loaded with noble metal oxide; 71-receiving holes; 72-a first connection hole; 73-a second connection hole; 74-connecting screw; 741-limit nuts.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The structure of the high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device can be schematically shown in fig. 1-4, and the high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device in the embodiment comprises: the device comprises an upper seal head 1, a lower seal head 2 and a processing unit. The upper seal head 1 is detachably arranged at the top of the treatment unit, and the lower seal head 2 is detachably arranged at the bottom of the treatment unit, so that a wastewater treatment space isolated from the external environment is formed inside the treatment unit. In order to facilitate the oxygen and the wastewater to be treated to enter and exit the device, a discharging tube group should be arranged on the upper end enclosure 1, and an aeration component and a liquid inlet tube 21 should be arranged on the lower end enclosure 2. In operation, wastewater to be treated will enter the apparatus along the feed pipe 21, oxygen required in the treatment process will enter the apparatus through the aeration assembly, and the treated wastewater and the excess gas phase components in the apparatus will leave the discharge pipe assembly from the apparatus.
Alternatively, as shown in fig. 2 and 3, the aeration assembly in this embodiment may include an aeration disc 22 and an aeration pipe 23, wherein the aeration pipe 23 is disposed inside a preset mounting hole on the lower head 2, the aeration disc 22 is located at one side of the lower head 2 near the treatment unit, a plurality of aeration holes are formed in the aeration disc 22, and the aeration disc 22 is in communication with the aeration pipe 23. During the production and processing of the device, workers can select the dimension specifications of the aeration pipe 23 and the aeration disc 22 according to the actual wastewater treatment requirements. Meanwhile, in order to facilitate the later maintenance of the device, the aeration pipe 23 and the liquid inlet pipe 21 are connected in a flange or thread mode.
For the waste water after the convenient treatment leaves this device to avoid this device inside because of the too high pressure and take place danger, the ejection of compact nest of tubes in this embodiment can include: blow-down tube 11, pressure measurement tube 12 and pressure relief tube 13. The blow-down pipe 11 should be provided with a blow-down valve 111, the pressure measuring pipe 12 is provided with a pressure gauge 121, and the pressure relief pipe 13 is provided with a safety valve 131. Before use, a worker can set the opening pressure of the safety valve 131 according to the working pressure of the device so as to avoid danger in the running process of the device. When the device is used, a worker can monitor the internal pressure of the device in real time through the pressure gauge 121 and control the on-off of the blow-down pipe 11 in a mode of opening the blow-down valve 111, so that the moment when materials leave the device is controlled.
In addition, in order to facilitate the adaptation of the device to higher working pressure, the upper seal head 1 and the lower seal head 2 can be designed into the common elliptical seal head shape in the field of pressure vessels, and are processed by adopting corrosion-resistant stainless steel or metallic titanium materials. Meanwhile, proper lining anti-corrosion measures are adopted at the inner sides of the upper seal head 1 and the lower seal head 2 so as to prolong the service life of the device.
In order to implement electrocatalytic oxidation treatment of wastewater, the treatment unit in this embodiment should include at least one electrode assembly, and when the treatment unit includes a plurality of electrode assemblies, the plurality of electrode assemblies should be sequentially spliced in the height direction. The staff can select the electrode assembly quantity inside the treatment unit according to the actual wastewater treatment requirement, so that the volume of the device is flexibly adjusted, and the treatment capacity of the device is matched with the actual requirement.
Fig. 4 is an exploded view of an electrode assembly according to the present embodiment, as shown in the drawings, the electrode assembly includes: a cathode plate 3, an anode plate 5 and two separator plates 4. Wherein the cathode plate 3 is provided with a first flow opening in which a cathode metal mesh 31 is provided. Two partition plates 4 are respectively provided at the upper and lower ends of the cathode plate 3, and an activated carbon felt 6 supporting noble metal oxide is provided between the partition plates 4 and the cathode plate 3. The isolation plate 4 is also provided with a second flow opening which is opposite to the first flow opening, and an isolation grating 41 is arranged in the second flow opening, when the isolation plate 4 and the cathode plate 3 are assembled, the isolation grating 41 can limit the activated carbon felt 6 loaded with noble metal oxide, and the activated carbon felt 6 loaded with noble metal oxide is ensured to be attached to the cathode metal mesh 31. The anode plate 5 is arranged below the cathode plate 3, the anode plate 5 is detachably connected with the isolation plate 4 arranged at the lower end of the cathode plate 3, a third flow opening which is opposite to the second flow opening is arranged on the anode plate 5, and an anode metal net 51 is arranged in the third flow opening. In addition, in order to conveniently supply electric energy to the inside of the electrode assembly, a cathode terminal 32 should be provided on the side wall of the cathode plate 3, an anode terminal 52 should be provided on the side wall of the anode plate 5, and a worker can connect the cathode of the power supply with the cathode terminal 32 through a wire and connect the anode of the power supply with the anode terminal 52 through a wire, so that hydroxyl radicals and hypochlorite are respectively generated in the areas of the cathode plate 3 and the anode plate 5, and further oxidation treatment is performed on pollutants in wastewater.
It should be noted that, in this embodiment, the cathode plate 3 and the anode plate 5 may be made of metal titanium, the separator 4 may be made of elastic insulating materials such as rubber and plastic PVC, and the activated carbon felt 6 loaded with noble metal oxide should use activated carbon fiber felt as a carrier, and the noble metal oxide is loaded by a gel method. In addition, in order to avoid corrosion of the cathode plate 3 and the anode plate 5 during operation, noble metal oxide coatings coated by sintering should be further provided on the cathode plate 3 and the anode plate 5.
In order to achieve the detachable connection between the components inside the electrode assembly, a plurality of receiving holes 71 are provided in the cathode plate 3, the plurality of receiving holes 71 are annularly arranged at the circumferential side of the first flow-through opening, and a connecting screw 74 is provided inside each receiving hole 71. Correspondingly, the first connecting holes 72 for accommodating the connecting screws 74 are formed in the separating plate 4 and the anode plate 5, and when assembling, workers can fix the positions of the cathode plate 3, the anode plate 5 and the separating plate 4 through the connecting screws 74, and connection among a plurality of electrode assemblies can be realized through the connecting screws 74. In addition, in order to achieve the detachable connection between the processing unit and the upper head 1, the lower head 2, a second connection hole 73 for accommodating a connection screw 74 is provided on both the upper head 1 and the lower head 2. Two limit nuts 741 are further arranged on the connecting screw 74, when the upper end socket is assembled, the bottom end of one limit nut 741 is propped against the top surface of the upper end socket 1, and the top end of the other limit nut 741 is propped against the bottom surface of the lower end socket 2, so that the upper end socket 1, the processing unit and the lower end socket 2 are connected.
Optionally, to limit the position of the activated carbon felt 6 loaded with noble metal oxide, in this embodiment, the thickness of the cathode metal mesh 31 should be smaller than the thickness of the cathode plate 3, the thickness of the anode metal mesh 51 should be smaller than the thickness of the anode plate 5, and the inner diameter of the first flow opening and the inner diameter of the second flow opening are equal to the inner diameter of the third flow opening, and the outer diameter of the activated carbon felt 6 loaded with noble metal oxide is equal to the inner diameter of the first flow opening.
In the actual working process, because the cathode plate 3, the anode plate 5 and the isolation plate 4 are spliced to form an electrode assembly for treating wastewater, the device does not need to be provided with a shell of a traditional catalytic oxidation device, so that the device can bear higher working pressure, a worker can conveniently convey a large amount of oxygen to the device through the aeration assembly, more hydroxyl free radicals are generated near the cathode plate 3, and the wastewater treatment capacity of the device is improved. Secondly, the splicing structure of the cathode plate 3, the anode plate 5 and the separation plate 4 can also reduce the distance between the cathode plate 3 and the anode plate 5, improve the mass transfer efficiency between the polar plates and accelerate the wastewater treatment speed. In addition, the structure can greatly reduce the tank voltage of the device, thereby reducing the occupied area of equipment and the energy consumption of work.
In the electrocatalytic oxidation reaction process, the treatment efficiency of the wastewater is in direct proportion to the total amount of electrons conveyed to the wastewater by the device, so that the greater the current in the electrode assembly is, the better the treatment effect of the wastewater is, but the whole operation power consumption of the device is the product of the cell voltage and the current, so that in actual operation, the opening rates of the cathode metal mesh 31 and the anode metal mesh 51 can be adjusted by staff, and the utilization efficiency of the current is improved on the basis of reducing the whole energy consumption of the device. Specifically, in operation, the cathode plate 3 is an electron emission end, the anode plate 5 is an electron receiving end, and since the resistance to receiving electrons is greater than the resistance to emitting electrons, the efficiency (i.e., current density) of receiving electrons by the anode plate 5 determines the upper limit of the current efficiency of the whole device. That is, in the case where the tank voltage is constant, the aperture ratio of the anode mesh 51 should be reduced as much as possible in order to increase the current density of the anode plate 5. However, since the wastewater to be treated flows along the openings of the cathode metal mesh 31 and the anode metal mesh 51, the opening rates of the cathode metal mesh 31 and the anode metal mesh 51 affect the hydraulic loss in the device, that is, the lower the opening rate is, the greater the hydraulic loss is, and accordingly, the water pump for driving the wastewater to flow consumes more energy.
In combination with the above-described two factors of current efficiency and hydraulic loss, the aperture ratio of the cathode metal mesh 31 described in the present embodiment should be larger than that of the anode metal mesh 51. Illustratively, the aperture ratio of the cathode metal mesh 31 may be set to 70% -80%, and the aperture ratio of the anode metal mesh 51 may be set to 30% -50%. Since the aperture ratio of the cathode metal mesh 31 does not greatly affect the current efficiency of the device, hydraulic loss can be greatly reduced by increasing the aperture ratio of the cathode metal mesh 31, and excessive energy consumption of the water pump can be avoided. At the same time, properly reducing the aperture ratio of the anode metal mesh 51 can significantly improve the current efficiency of the apparatus, thereby enhancing the wastewater treatment effect.
Further, as an alternative implementation of the present embodiment, in order to enhance the sealing effect of the electrode assembly, first seal ring grooves 33 may be provided on both upper and lower end surfaces of the cathode plate 3, and the inner diameter of the first seal ring grooves 33 is greater than the inner diameter of the first flow opening. Correspondingly, the upper end surface and the lower end surface of the isolation plate 4 can be provided with a second sealing ring groove 42 with the inner diameter larger than that of the second flow opening, and the upper end surface and the lower end surface of the anode plate 5 can be provided with a third sealing ring groove 53 with the inner diameter larger than that of the third flow opening. During assembly, the second sealing ring groove 42 should be aligned with the first sealing ring groove 33, the third sealing ring groove 53 should be aligned with the second sealing ring groove 42, and a worker can install a sealing ring between two adjacent sealing ring grooves, so as to prevent waste water or gas-phase materials inside the device from flowing outwards along the splicing gap.
Effects of the above scheme are described below:
the embodiment provides a high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device, which can improve mass transfer efficiency between adjacent polar plates by an electrode assembly formed by splicing components such as a cathode plate, an anode plate, a separation plate and the like, and adapt to higher working pressure, so that the efficiency and the effect of wastewater treatment are improved. In addition, the device can flexibly adjust the number of the electrode assemblies according to actual demands, thereby meeting different working conditions.
The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device, which is characterized by comprising: the device comprises an upper sealing head (1), a lower sealing head (2) and a processing unit, wherein the upper sealing head (1) is detachably arranged at the top of the processing unit, a discharging pipe group is arranged on the upper sealing head (1), the lower sealing head (2) is detachably arranged at the bottom of the processing unit, and an aeration assembly and a liquid inlet pipe (21) are arranged on the lower sealing head (2); the processing unit includes at least one electrode assembly including: a cathode plate (3), an anode plate (5) and two separation plates (4); the cathode plate (3) is provided with a first flow opening, a cathode metal net (31) is arranged in the first flow opening, and a cathode terminal (32) is arranged on the side wall of the cathode plate (3); the two isolation plates (4) are respectively and detachably arranged at the upper end and the lower end of the cathode plate (3), and an active carbon felt (6) for loading noble metal oxide is arranged between the isolation plates (4) and the cathode plate (3); a second flow opening is arranged on the isolation plate (4), the second flow opening is aligned with the first flow opening, and an isolation grid (41) is arranged in the second flow opening; the anode plate (5) is arranged below the cathode plate (3), and the anode plate (5) is detachably connected with the isolation plate (4) arranged at the lower end of the cathode plate (3); a third flow opening is arranged on the anode plate (5), the third flow opening is opposite to the second flow opening, an anode metal net (51) is arranged in the third flow opening, and an anode terminal (52) is arranged on the side wall of the anode plate (5).
2. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: when the processing unit includes a plurality of electrode assemblies, the plurality of electrode assemblies are sequentially spliced in the height direction.
3. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the aperture ratio of the cathode metal net (31) is larger than that of the anode metal net (51).
4. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the cathode plate (3) is provided with a plurality of containing holes (71), the containing holes (71) are annularly arranged on the periphery of the first flow opening, and a connecting screw (74) is arranged in each containing hole (71); a first connecting hole (72) for accommodating a connecting screw rod (74) is formed in each of the isolation plate (4) and the anode plate (5), and a second connecting hole (73) for accommodating the connecting screw rod (74) is formed in each of the upper seal head (1) and the lower seal head (2); two limit nuts (741) are further arranged on the connecting screw rod (74), the bottom end of one limit nut (741) is propped against the top surface of the upper seal head (1), and the top end of the other limit nut (741) is propped against the bottom surface of the lower seal head (2).
5. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the inner diameter of the first flow opening and the inner diameter of the second flow opening are equal to the inner diameter of the third flow opening, and the outer diameter of the noble metal oxide-loaded activated carbon felt (6) is equal to the inner diameter of the first flow opening.
6. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the thickness of the cathode metal net (31) is smaller than that of the cathode plate (3), and the thickness of the anode metal net (51) is smaller than that of the anode plate (5).
7. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the upper end face and the lower end face of the cathode plate (3) are respectively provided with a first sealing ring groove (33), and the inner diameter of the first sealing ring groove (33) is larger than the inner diameter of the first flow opening; the upper end face and the lower end face of the isolation plate (4) are respectively provided with a second sealing ring groove (42), the second sealing ring grooves (42) are aligned with the first sealing ring grooves (33), and the inner diameter of the second sealing ring grooves (42) is larger than the inner diameter of the second circulation opening; and third sealing ring grooves (53) are formed in the upper end face and the lower end face of the anode plate (5), the third sealing ring grooves (53) are aligned with the second sealing ring grooves (42), and the inner diameter of the third sealing ring grooves (53) is larger than the inner diameter of the third communication opening.
8. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the discharge tube group includes: the pressure measuring device comprises a blow-down pipe (11), a pressure measuring pipe (12) and a pressure relief pipe (13), wherein a blow-down valve (111) is arranged on the blow-down pipe (11), a pressure gauge (121) is arranged on the pressure measuring pipe (12), and a safety valve (131) is arranged on the pressure relief pipe (13).
9. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the aeration assembly comprises an aeration disc (22) and an aeration pipe (23), wherein the aeration pipe (23) is arranged in a preset mounting hole on the lower end socket (2), the aeration disc (22) is positioned on one side of the lower end socket (2) close to the treatment unit, a plurality of aeration holes are formed in the aeration disc (22), and the aeration disc (22) is communicated with the aeration pipe (23).
10. The high-voltage cathode electro-Fenton catalytic oxidation sewage treatment device according to claim 1, wherein: the cathode plate (3) and the anode plate (5) are both made of metallic titanium, and noble metal oxide coatings coated by a sintering method are arranged on the cathode plate (3) and the anode plate (5); the isolation plate (4) is made of elastic insulating materials; the active carbon felt (6) loaded with the noble metal oxide takes an active carbon fiber felt as a carrier, and the noble metal oxide is loaded by a gel method.
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