Ultrasonic coupling electrocatalytic oxidation sewage treatment device

Abstract

The utility model provides an ultrasonic coupling electrocatalytic oxidation sewage treatment device, which relates to the technical field of water treatment and comprises an electrocatalytic oxidation chamber and an ultrasonic cavitation chamber which are communicated with each other, and a cathode plate, an anode plate, a screen frame and a catalyst are arranged in the electrocatalytic oxidation chamber; an ultrasonic transmission channel and an aeration pipe are arranged at the bottom of the electrocatalytic oxidation chamber; a multi-layer porous plate, an ultrasonic transducer and a purified water outlet are arranged in the ultrasonic cavitation chamber; the cathode plate and the anode plate are connected through a lead; and the other end of the electrocatalytic oxidation chamber is also communicated with a pretreatment chamber. Through the synergistic effect of the multiple stages of reaction chambers, the modularized catalyst and ultrasonic waves, the problems that the catalyst is difficult to replace, the oxidation efficiency is low and precipitates are accumulated are solved, and high-efficiency treatment of wastewater is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment technical field, specifically, relate to a kind of ultrasonic coupling electro-catalytic oxidation sewage treatment device. BACKGROUND

[0002] With the increasingly stringent local sewage discharge standards, industrial non-degradable wastewater discharge standard becomes the bottleneck of restricting enterprise development, and the existing sewage advanced treatment technology generally has the problems of low efficiency, high cost, therefore, developing efficient advanced treatment technology has important practical significance, and is also the key problem urgently to be solved in water pollution control field.

[0003] Electro-catalytic oxidation technology is to complete the decomposition process of organic matter under the action of applied electric field. Compared with traditional chemical oxidation reaction, electro-catalytic oxidation reaction is usually carried out at normal temperature and pressure, and the operation condition is relatively mild, and the electrochemical process can be adjusted by changing voltage, current and other external conditions, which has strong controllability, and can be combined with other process technologies to achieve the purpose of comprehensive treatment.

[0004] However, the existing electro-catalytic oxidation technology has problems such as difficult catalyst replacement, low oxidation efficiency and easy deposition of precipitates. Part of the technology uses ultrasonic assistance, but is mostly limited to single reaction chamber, and it is difficult to realize collaborative treatment.

[0005] Therefore, an integrated ultrasonic and electro-catalytic oxidation sewage treatment device is needed to improve the efficiency of sewage treatment. UTILITY MODEL CONTENT

[0006] In view of this, the utility model provides an ultrasonic coupling electro-catalytic oxidation sewage treatment device, aiming to solve the problems of difficult catalyst replacement, low oxidation efficiency and deposition of precipitates, and realize efficient treatment of wastewater.

[0007] The utility model provides an ultrasonic coupling electro-catalytic oxidation sewage treatment device, comprising:

[0008] The electro-catalytic oxidation chamber and the ultrasonic cavitation chamber are connected;

[0009] The cathode plate and the anode plate are symmetrically inserted in the electro-catalytic oxidation chamber, a plurality of removable mesh frames are inserted between the cathode plate and the anode plate, the mesh frames are filled with catalyst, the electro-catalytic oxidation chamber is provided with an ultrasonic transmission channel at the bottom, the ultrasonic transmission channel is provided with an aeration pipe, the aeration pipe is uniformly distributed with through holes and connected with an external gas source;

[0010] A plurality of porous plates are arranged in the ultrasonic cavitation chamber from top to bottom, an ultrasonic transducer is installed corresponding to each layer of porous plates, and a water outlet is arranged on the side of the ultrasonic cavitation chamber;

[0011] The cathode plate and the anode plate are connected through wires;

[0012] The other end of the electro-catalytic oxidation chamber is also communicated with a pretreatment chamber.

[0013] Further, the net frame is a stainless steel net structure, which is inserted into the side wall slot of the electro-catalytic oxidation chamber, and the net frames are sequentially arranged and can be individually drawn and replaced.

[0014] Further, the ultrasonic transmission channel is communicated with an external ultrasonic generator, and the ultrasonic transmission channel penetrates through the bottom of the electro-catalytic oxidation chamber and extends to below the net frame.

[0015] Further, a water quality monitoring sensor is arranged at the water outlet of the ultrasonic cavitation chamber, and the water quality monitoring sensor is electrically connected with the control system, so as to adjust the operation state of the ultrasonic transducer in real time.

[0016] Further, a microwave generator is arranged at the top of the pretreatment chamber, and a plasma reactor is arranged at the side of the pretreatment chamber.

[0017] Further, the water outlet of the pretreatment chamber is communicated with the electro-catalytic oxidation chamber.

[0018] Further, a dielectric barrier discharge electrode is arranged in the plasma reactor.

[0019] Further, a partition plate is arranged between the pretreatment chamber and the electro-catalytic oxidation chamber and is located in the water outlet of the pretreatment chamber, so as to intercept the precipitates.

[0020] Further, a gas-liquid mixing pump is arranged between the water inlet of the pretreatment chamber and the plasma reactor.

[0021] Further, a mixer is further arranged in the pretreatment chamber, a first liquid inlet of the mixer is connected with an external wastewater source, and a second liquid inlet of the mixer is connected with a medicament injection pipe, so as to realize the mixing of wastewater and medicament.

[0022] Compared with the prior art, the beneficial effects of the utility model lie in that:

[0023] 1. The microwave generator and the plasma reactor are arranged in the pretreatment chamber, macromolecular organic matters are decomposed through microwave pretreatment, active free radicals are generated by plasma, electro-catalytic oxidation is used for deep degradation, ultrasonic cavitation is used for mass transfer enhancement, and a high-efficiency treatment process is formed.

[0024] 2. The cathode plate and the anode plate are symmetrically inserted in the electro-catalytic oxidation chamber, a plurality of net frames are inserted between the cathode plate and the anode plate, the net frames are filled with catalysts, the net frame type catalyst is arranged, the net frame type catalyst can be replaced at a fixed point, and the usability of the device is improved.

[0025] 3. The ultrasonic cavitation chamber is provided with multiple layers of perforated plates from top to bottom, each layer of the perforated plate is correspondingly installed with an ultrasonic transducer, and the ultrasonic cavitation chamber is provided with a clean water outlet, so that the attachment of the precipitate is effectively inhibited, and the blockage is reduced compared with other devices. BRIEF DESCRIPTION OF DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments and are not meant to limit the present application. Furthermore, the same reference numerals in different drawings refer to the same or similar components. In the drawings:

[0027] Figure 1 A structure schematic view of the ultrasonic wave coupled electro-catalytic oxidation sewage treatment device provided by the embodiment of the present application is provided.

[0028] Figure 2 A partial structure view of the ultrasonic wave coupled electro-catalytic oxidation sewage treatment device provided by the embodiment of the present application is provided.

[0029] In the figure: 100-electro-catalytic oxidation chamber; 110-ultrasonic cavitation chamber; 120-preprocessing chamber; 130-cathode plate; 140-anode plate; 150-net frame; 160-catalyst; 170-ultrasonic wave transmission channel; 180-aeration pipe; 190-perforated plate; 200-ultrasonic transducer; 210-clean water outlet; 220-water quality monitoring sensor; 221-control system; 222-plasma reactor; 223-preprocessing chamber water outlet; 224-lattice plate; 225-gas-liquid mixing pump; 226-mixer; 227-first liquid inlet; 228-second liquid inlet; 230-microwave generator. DETAILED DESCRIPTION

[0030] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] The terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of the technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Referring to Figure 1 and Figure 2 The utility model discloses an electric catalytic oxidation chamber 100 and ultrasonic cavitation chamber 110 are connected, the cathode plate 130 and the anode plate 140 are symmetrically inserted in the electric catalytic oxidation chamber 100, a plurality of net frame 150 is inserted between the cathode plate 130 and the anode plate 140, the net frame 150 is filled with catalyst 160, the ultrasonic wave transmission channel 170 is equipped at the bottom of the electric catalytic oxidation chamber 100, the ultrasonic wave transmission channel 170 is provided with aeration pipe 180, the aeration pipe 180 is evenly distributed with through -hole and is connected with external gas source, the ultrasonic cavitation chamber 110 is provided with multilayer porous plate 190 from top to bottom, the porous plate 190 of each layer corresponds to install ultrasonic transducer 200, the ultrasonic cavitation chamber 110 top is provided with clean water outlet 210, the cathode plate 130, the anode plate 140 are connected with solar panel through wire, the ultrasonic transducer 200 is connected with independent power supply, the electric catalytic oxidation chamber 100 other end is also connected with pretreatment chamber 120.

[0035] From the above, the external wastewater source flows into the pretreatment chamber 120 from the first liquid inlet 227 of the mixer 226, the second liquid inlet 228 of the mixer 226 is started, and the mixing of the wastewater and the medicament is completed. The mixed liquid is subjected to microwave radiation and plasma oxidation treatment in the pretreatment chamber 120, and the preliminarily decomposed wastewater enters the electric catalytic oxidation chamber 100. After the cathode plate 130 and the anode plate 140 are powered on, the catalyst 160 generates active free radicals under the action of the electric field, and the preliminarily decomposed wastewater is degraded. At the same time, the aeration pipe 180 in the ultrasonic wave transmission channel 170 is connected with air, and the ultrasonic wave transmission channel 170 emits ultrasonic waves to prevent precipitation. The treated wastewater flows to the ultrasonic cavitation chamber 110, is further mineralized by multi-frequency ultrasonic cavitation in the layered structure of the porous plate 190, and is finally discharged from the clean water outlet 210.

[0036] It can be understood that the microwave, plasma and electro-catalytic oxidation triple technology superimposes to form an efficient wastewater treatment process. In addition, the catalyst 160 in the net frame 150 supports spot replacement, which can reduce downtime.

[0037] Specifically, the net frame 150 is a stainless steel mesh structure, which is inserted into the side wall slot of the electro-catalytic oxidation chamber 100 on both sides, and the net frames 150 are sequentially arranged and can be individually extracted.

[0038] As can be seen from the above, the net frame 150 is made of 304 stainless steel and is a cuboid frame. A stainless steel screen is welded inside the frame, and the surface of the screen is loaded with catalyst 160. The two sides of the net frame 150 are provided with guide strips, which match the grooves of the side walls of the electro-catalytic oxidation chamber 100, to ensure accurate alignment during insertion. The top of the net frame 150 is provided with an elastic buckle, which is automatically locked after being inserted into the slot to prevent displacement caused by water impact. The bottom is provided with a limiting protrusion to limit the sinking of the net frame 150. A plurality of grooves are provided in the inner walls of the two sides of the electro-catalytic oxidation chamber 100 and are arranged in parallel. Through such a setting, the operator can release the locking state by pressing the elastic buckle on the top of the net frame 150; the screen inside the net frame 150 is extracted together with the net frame 150 along the groove; the guide strip of the new net frame 150 is aligned with the groove entrance, and is pushed horizontally into the limiting protrusion until the groove bottom is contacted, and the buckle is automatically locked.

[0039] Specifically, the microwave generator 230 is provided on the top of the pretreatment chamber 120, and the plasma reactor 222 is provided on the side of the pretreatment chamber 120. The outlet 223 of the pretreatment chamber is communicated with the electro-catalytic oxidation chamber 100, and the dielectric barrier discharge electrode is arranged in the plasma reactor 222.

[0040] As can be seen from the above, the microwave generator 230 is fixed on the top center of the pretreatment chamber 120, and a heat dissipation hole is provided on the top of the microwave generator 230. The inner wall of the pretreatment chamber 120 is coated with a microwave reflection coating to ensure that the microwave energy can uniformly act on the wastewater. The plasma reactor 222 is a cylindrical pressure-resistant container, and the side wall thereof is fixed to the inner side wall of the pretreatment chamber 120 by bolts. A gap is provided between the two poles of the dielectric barrier discharge electrode for stable discharge and to prevent electrode corrosion.

[0041] In another preferred embodiment, the gas inlet of the plasma reactor 222 is communicated with a nitrogen filtering mechanism, and the nitrogen filtering mechanism includes three series filter cartridges: a coarse filter layer for adsorbing impurities by activated carbon; a fine filter layer for removing water and trace oxygen by molecular sieve; and a sterilization layer for killing microorganisms by ultraviolet lamp. The filtered nitrogen is delivered to the bottom of the plasma reactor 222 through a pressure reducing valve and uniformly enters the discharge area.

[0042] The pretreatment chamber outlet 223 is connected with the inlet of the electro-catalytic oxidation chamber 100 through a gas-liquid mixing pump 225.

[0043] Specifically, the ultrasonic transmission channel 170 is in communication with an external ultrasonic generator, and the ultrasonic transmission channel 170 penetrates through the bottom of the electro-catalytic oxidation chamber 100 and extends to below the mesh frame 150.

[0044] As can be seen from the above, the ultrasonic transmission channel 170 is horizontally laid along the bottom of the electro-catalytic oxidation chamber 100, and the end extends to just below the mesh frame 150, forming a bend, so as to ensure that the ultrasonic wave covers the area of the mesh frame 150.

[0045] The water quality sensor 220 is installed at the purified water outlet 210, and when the water quality monitoring sensor 220 detects a value greater than a threshold value, the external controller starts and stops the gas-liquid mixing pump 225, the ultrasonic generator and the reagent injection pipe, and adjusts the power.

[0046] Those skilled in the art can understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments. For those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonically coupled electro-catalytic oxidation wastewater treatment apparatus, characterized by, It comprises a communicating electro-catalytic oxidation chamber and an ultrasonic cavitation chamber. Symmetrical cathode plates and anode plates are inserted in the electro-catalytic oxidation chamber, a plurality of net frames are inserted between the cathode plates and the anode plates, the net frames are filled with catalysts, an ultrasonic transmission channel is arranged at the bottom of the electro-catalytic oxidation chamber, an aeration pipe is arranged in the ultrasonic transmission channel, and the aeration pipe is connected with an external air source and is uniformly provided with through holes; A plurality of porous plates are arranged in the ultrasonic cavitation chamber from top to bottom, an ultrasonic transducer is installed on each of the porous plates, and a clean water outlet is arranged on the side of the ultrasonic cavitation chamber. The cathode plates and the anode plates are connected through wires. The electro-catalytic oxidation chamber is further communicated with a pretreatment chamber.

2. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 1, wherein, The net frame is a stainless steel net structure, which is inserted into the side wall slot of the electro-catalytic oxidation chamber, and the net frames are sequentially arranged and can be individually extracted.

3. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 1, wherein, The ultrasonic transmission channel is communicated with an external ultrasonic generator, and the ultrasonic transmission channel penetrates through the bottom of the electro-catalytic oxidation chamber and extends to below the net frame.

4. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device according to claim 1 or 3, wherein, A water quality monitoring sensor is arranged at the clean water outlet of the ultrasonic cavitation chamber, and the water quality monitoring sensor is electrically connected with a control system for real-time adjustment of the operation state of the ultrasonic transducer.

5. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 1, wherein, A microwave generator is arranged at the top of the pretreatment chamber, and a plasma reactor is arranged at the side of the pretreatment chamber.

6. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 5, wherein, The water outlet of the pretreatment chamber is communicated with the electro-catalytic oxidation chamber.

7. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 5, wherein, A dielectric barrier discharge electrode is arranged in the plasma reactor.

8. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 1, wherein, A partition is arranged between the pretreatment chamber and the electro-catalytic oxidation chamber and is located in the water outlet of the pretreatment chamber for intercepting precipitates.

9. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 5, wherein, An air-liquid mixing pump is arranged between the water inlet of the pretreatment chamber and the plasma reactor.

10. The ultrasonically coupled electro-catalytic oxidation wastewater treatment device of claim 1, wherein, A mixer is further arranged in the pretreatment chamber, a first liquid inlet of the mixer is connected with an external wastewater source, and a second liquid inlet of the mixer is connected with a medicament injection pipe for mixing wastewater and medicament.

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