Ammonia nitrogen removal electrolysis device with electrode passivation prevention function

Abstract

The utility model discloses an ammonia nitrogen removal electrolysis device with an electrode passivation prevention function. The ammonia nitrogen removal electrolysis device comprises an electrolytic tank and an aeration pipe, an arc-shaped anode plate and an arc-shaped cathode plate are detachably installed on the left side and the right side in the electrolytic tank respectively, two sets of aeration pipes are vertically and rotatably installed on the inner side of the electrolytic tank and located between the arc-shaped anode plate and the arc-shaped cathode plate, the two sets of aeration pipes are symmetrically arranged in the electrolytic tank, and a plurality of sets of branch pipes are fixedly installed on the outer side walls of the aeration pipes. A connecting arm is fixedly arranged outside the top of the aeration pipe, an auxiliary pipe is vertically and fixedly arranged at the bottom of the other end of the connecting arm, and a plurality of groups of air nozzles are fixedly arranged at the other end of the branch pipe and the inner side wall of the auxiliary pipe. According to the utility model, a periodic turbulence field can be formed on the surface of the electrode by matching the swinging aeration pipe with the air tap, and a passive film precursor is effectively stripped, so that the active area retention rate of the electrode is improved, and the service life of the electrode is remarkably prolonged.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an electrolytic device for removing ammonia nitrogen with electrode passivation prevention function. Background Technology

[0002] Ammonia nitrogen wastewater is a common source of pollution in industrial production, mainly originating from industries such as fertilizers, chemicals, and pharmaceuticals. Traditional treatment methods include biological nitrification / denitrification, stripping, and breakpoint chlorination, but these methods have drawbacks such as long treatment cycles, high risk of secondary pollution, and high energy consumption. In contrast, electrolysis has become a research hotspot for the treatment of high-concentration ammonia nitrogen wastewater due to its advantages such as fast reaction speed, no secondary pollution, and modular design.

[0003] However, during the electrolysis process of current ammonia nitrogen removal electrolysis devices, a dense oxide film is easily formed on the electrode surface, which reduces the number of active sites on the electrode. Although traditional static aeration devices can wash the electrode surface, they cannot solve the problem of three-dimensional passivation. In addition, the mass transfer area of ​​the flat plate electrode is limited, and the contact time between the wastewater and the electrode is insufficient. The ammonia nitrogen removal rate can only reach 75-85%, which is difficult to meet the needs of high-concentration wastewater treatment.

[0004] Therefore, how to provide an electrolytic device for removing ammonia nitrogen with electrode passivation prevention function is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide an electrolytic device for removing ammonia nitrogen with electrode anti-passivation function. This invention can form a periodic turbulent flow field on the electrode surface by using an oscillating aeration pipe in conjunction with an air nozzle, effectively stripping the passivation film precursor, increasing the electrode active area retention rate, and significantly extending the electrode service life.

[0006] An electrolytic device for removing ammonia nitrogen with electrode anti-passivation function according to an embodiment of the present invention includes an electrolytic cell and an aeration pipe.

[0007] The electrolytic cell has detachable arc-shaped anode plates and arc-shaped cathode plates installed on its left and right sides respectively. Inside the electrolytic cell, between the arc-shaped anode plates and arc-shaped cathode plates, two sets of aeration pipes are vertically and rotatably installed, and the two sets of aeration pipes are symmetrically arranged inside the electrolytic cell. Several sets of branch pipes are fixedly installed on the outer wall of the aeration pipe. A connecting arm is fixedly installed on the outer side of the top of the aeration pipe. A secondary pipe is vertically fixedly installed at the bottom of the other end of the connecting arm. Several sets of air nozzles are fixedly installed on the other end of the branch pipe and the inner wall of the secondary pipe.

[0008] A connecting pipe is fixedly installed at the top of the aeration pipe, and a gear disk is fixedly installed at the top of the connecting pipe. A bracket is fixedly installed in the center of the rear wall of the electrolytic cell. An electric telescopic rod is fixedly installed at the front end of the bracket. A toothed plate with toothed grooves on both sides is fixedly installed at the front end of the electric telescopic rod. The toothed grooves on the outer walls of the toothed plate on both sides mesh with two sets of gear disks respectively.

[0009] Furthermore, a socket is fixedly installed on the center of the front and rear sides of the inner wall of the electrolytic cell, and slots are symmetrically opened on both sides of the socket. The ends of the arc-shaped anode plate and the arc-shaped cathode plate are respectively inserted into the slots.

[0010] Furthermore, an annular seat is provided at the bottom of the electrolytic cell and at the bottom of each of the two sets of aeration pipes, and the bottom of each set of aeration pipes is movably installed in the annular seat.

[0011] Furthermore, the top of the electrolytic cell is symmetrically provided with caps on both sides, and the two sets of caps are symmetrically and movable on both sides of the top of the electrolytic cell via slide rails.

[0012] Furthermore, an inlet is provided at the bottom of one side of the electrolytic cell, and an outlet is provided at the top of the other side of the electrolytic cell.

[0013] Furthermore, the branch pipe and the auxiliary pipe are respectively arranged on the inner and outer sides of the arc-shaped anode plate and the arc-shaped cathode plate, and the air nozzles of each group are all facing the arc-shaped anode plate and the arc-shaped cathode plate.

[0014] Furthermore, the aeration pipe, branch pipe, connecting pipe, connecting arm, and auxiliary pipe are all interconnected.

[0015] Furthermore, a rotary joint is fixedly installed at the center of the top of the gear disk, and the bottom of the rotary joint is connected to the connecting pipe.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model increases the contact area between wastewater and electrodes through the three-dimensional arrangement of arc-shaped electrode plates. Furthermore, by pushing the toothed plate back and forth with an electric telescopic rod, two sets of gears and the corresponding aeration pipes below can be driven to reciprocate, thereby achieving oscillating aeration and forming a periodic scouring airflow. This improves the mass transfer efficiency of the electrode surface, effectively inhibits the formation of passivation film, and extends the service life of the electrodes.

[0018] 2. This utility model allows for the insertion and installation of arc-shaped anode plates and arc-shaped cathode plates through slots on both sides of the socket. Therefore, the arc-shaped anode plates and arc-shaped cathode plates can be installed and disassembled quickly and conveniently. Furthermore, components such as aeration pipes and auxiliary pipes can also be pulled upwards to complete the disassembly, facilitating replacement or maintenance operations and making subsequent maintenance more labor-saving and convenient. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of an electrolytic device for removing ammonia nitrogen with electrode anti-passivation function proposed in this utility model.

[0021] Figure 2 A schematic diagram of the sealing and opening structure of an electrolytic device for removing ammonia nitrogen with electrode anti-passivation function proposed in this utility model;

[0022] Figure 3 This is a schematic diagram showing the disassembled structure of an electrolytic device for removing ammonia nitrogen with electrode anti-passivation function proposed in this utility model.

[0023] Figure 4 This is a schematic diagram of the connection structure of the aeration pipe, branch pipe and auxiliary pipe of an electrolytic device for removing ammonia nitrogen with electrode passivation prevention function proposed in this utility model.

[0024] In the diagram: 1. Electrolytic cell; 2. Cover; 3. Inlet; 4. Outlet; 5. Support; 6. Electric telescopic rod; 7. Toothed plate; 8. Socket; 9. Arc-shaped anode plate; 10. Arc-shaped cathode plate; 11. Aeration pipe; 12. Gear disc; 13. Ring seat; 14. Slot; 15. Connecting pipe; 16. Rotary joint; 17. Connecting arm; 18. Secondary pipe; 19. Branch pipe; 20. Air nozzle. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] refer to Figure 1-2 An electrolytic device for removing ammonia nitrogen with electrode passivation prevention function includes an electrolytic cell 1 and an aeration pipe 11.

[0027] The electrolytic cell 1 has an arc-shaped anode plate 9 and an arc-shaped cathode plate 10 that can be detachably installed on the left and right sides respectively.

[0028] Specifically, sockets 8 are fixedly installed in the center of the front and rear sides of the inner wall of the electrolytic cell 1. Slots 14 are symmetrically opened on both sides of the sockets 8. The ends of the arc-shaped anode plate 9 and the arc-shaped cathode plate 10 are respectively inserted into the slots 14. In the actual installation process, the operator can accurately insert the ends of the arc-shaped anode plate 9 and the arc-shaped cathode plate 10 into the slots 14 to achieve quick installation of the electrode plates. When the electrode plates need to be replaced or maintained after a period of use, they can simply be pulled out of the slots 14. The operation is convenient and quick, which greatly improves the efficiency of equipment maintenance.

[0029] The electrolytic cell 1 has an inlet 3 at the bottom of one side and an outlet 4 at the top of the other side. The ammonia-nitrogen-containing wastewater to be treated enters the electrolytic cell 1 through the inlet 3. After electrolytic treatment to remove ammonia nitrogen in the electrolytic cell 1, the purified water flows out from the outlet 4. This inlet and outlet configuration allows the wastewater to flow fully in the electrolytic cell 1, ensuring the effectiveness of the electrolytic treatment.

[0030] Secondly, the top of the electrolytic cell 1 is symmetrically equipped with two covers 2 on both sides, and the two sets of covers 2 are symmetrically installed on both sides of the top of the electrolytic cell 1 via slide rails. When the equipment is running normally, the covers 2 can slide to a suitable position via the slide rails to seal the top of the electrolytic cell 1, preventing gas leakage during electrolysis and reducing the impact of external impurities entering the electrolytic cell 1 on the treatment effect. When it is necessary to inspect or maintain the inside of the electrolytic cell 1, the covers 2 can be opened via the slide rails for easy operation by the operator.

[0031] In this embodiment, by detachably installing the arc-shaped anode plate 9 and the arc-shaped cathode plate 10 inside the electrolytic cell 1, and with the arrangement of the inlet 3, outlet 4 and cover 2, the equipment is made more convenient and efficient in installation, maintenance and operation, providing a good foundation for subsequent electrolytic ammonia nitrogen treatment.

[0032] refer to Figure 1-4 Two sets of aeration pipes 11 are vertically and rotatably installed inside the electrolytic cell 1 and between the arc-shaped anode plate 9 and the arc-shaped cathode plate 10. The two sets of aeration pipes 11 are symmetrically arranged inside the electrolytic cell 1. Several sets of branch pipes 19 are fixedly installed on the outer wall of the aeration pipe 11. A connecting arm 17 is fixedly installed on the outer side of the top of the aeration pipe 11. A secondary pipe 18 is vertically fixedly installed at the bottom of the other end of the connecting arm 17. Several sets of air nozzles 20 are fixedly installed on the other end of the branch pipe 19 and the inner wall of the secondary pipe 18.

[0033] Among them, the branch pipe 19 and the auxiliary pipe 18 are respectively set on the inner and outer sides of the arc-shaped anode plate 9 and the arc-shaped cathode plate 10, and each set of air nozzles 20 faces the arc-shaped anode plate 9 and the arc-shaped cathode plate 10. When gas is introduced into the aeration pipe 11, the gas passes through the interconnected aeration pipe 11, branch pipe 19, connecting pipe 15, connecting arm 17 and auxiliary pipe 18, and finally sprays out from the air nozzle 20. Since the air nozzle 20 faces the arc-shaped anode plate 9 and the arc-shaped cathode plate 10, the sprayed gas can directly act on the surface of the electrode plate, effectively preventing the electrode plate from becoming passivated.

[0034] Secondly, annular seats 13 are provided at the bottom of the electrolytic cell 1 and at the bottom of the two sets of aeration pipes 11 respectively. The bottom of the two sets of aeration pipes 11 are movably installed in the annular seats 13. The annular seats 13 provide stable support for the aeration pipes 11 and ensure that the aeration pipes 11 can rotate freely in the annular seats 13, so that the gas sprayed from the nozzle 20 can more comprehensively cover the surface of the electrode plate and improve the passivation prevention effect.

[0035] In addition, the aeration pipe 11, branch pipe 19, connecting pipe 15, connecting arm 17 and auxiliary pipe 18 are all interconnected; this structural design ensures that the gas can flow smoothly throughout the pipeline system and ensures that each nozzle 20 can spray gas evenly.

[0036] In this embodiment, through the reasonable arrangement of the aeration pipe 11, branch pipe 19, secondary pipe 18 and air nozzle 20, and the supporting role of the annular seat 13, the gas can be applied evenly and comprehensively to the surface of the arc-shaped anode plate 9 and the arc-shaped cathode plate 10, effectively preventing electrode plate passivation and improving the electrolysis efficiency and service life of the equipment.

[0037] refer to Figure 1-4 A connecting pipe 15 is fixedly installed at the top of the aeration pipe 11, and a gear disk 12 is fixedly installed at the top of the connecting pipe 15. A bracket 5 is fixedly installed in the middle of the rear wall of the electrolytic cell 1. An electric telescopic rod 6 is fixedly installed at the front end of the bracket 5. A toothed plate 7 with toothed grooves on both sides is fixedly installed at the front end of the electric telescopic rod 6. The toothed grooves on the outer walls of the toothed plate 7 on both sides mesh with two sets of gear disks 12 respectively.

[0038] A rotary joint 16 is fixedly installed at the center of the top of the gear disk 12, and the bottom of the rotary joint 16 is connected to the connecting pipe 15. Since the tooth grooves on both sides of the tooth plate 7 mesh with the two sets of gear disks 12, the movement of the tooth plate 7 will cause the gear disk 12 to rotate, thereby driving the connecting pipe 15 and the aeration pipe 11 to rotate. The rotary joint 16 ensures that the gas can still smoothly enter the connecting pipe 15 through the rotary joint 16 during the rotation of the aeration pipe 11, so as to supply gas to the air nozzle 20.

[0039] In this embodiment, the rotation of the aeration pipe 11 is achieved through the cooperation of the electric telescopic rod 6, the toothed plate 7 and the gear disk 12, so that the air nozzle 20 can spray air onto the surface of the arc-shaped anode plate 9 and the arc-shaped cathode plate 10 at multiple angles, which further enhances the anti-passivation effect. At the same time, the use of the rotary joint 16 ensures the continuity of air supply.

[0040] Working principle: First, wastewater containing ammonia nitrogen enters the electrolytic cell 1 tangentially through the bottom inlet 3. Under the influence of a DC electric field, the wastewater undergoes oxidation at the arc-shaped anode plate 9 and reduction at the arc-shaped cathode plate 10, thus achieving the removal of ammonia nitrogen. During operation, compressed air enters the aeration pipe 11 through the rotary joint 16, and is then delivered to the air nozzle 20 via the branch pipe 19 and auxiliary pipe 18. The air nozzle 20 adopts a Venturi structure design, achieving an air outlet velocity of 15-20 m / s, forming a high-speed turbulent flow zone, with the aeration intensity controlled at 0.5-1.0 m / s. 3 / (m 2 The device effectively flushes the electrode surface while avoiding excessive disturbance. Simultaneously, the electric telescopic rod 6 can be activated to move the toothed plate 7 back and forth. The toothed plate 7 drives the gear disc 12 to rotate reciprocally, causing the aeration pipe 11 to oscillate periodically. The branch pipes 19 and secondary pipes 18 on each aeration pipe 11 form a 360° annular aeration area, covering the electrode plate surface. Subsequently, the rising water carries air bubbles and flocs to form an air flotation layer, which accumulates at the top of the tank. The purified water is discharged through the overflow weir-type outlet 4. The electrode plate of this device adopts a slot-type quick-installation structure, allowing for rapid replacement by a single person. Before replacing the arc-shaped anode plate 9 and arc-shaped cathode plate 10, the aeration pipe 11 can be lifted upwards and pulled out into the annular seat 13 for disassembly. Immediately afterward, the arc-shaped anode plate 9 and arc-shaped cathode plate 10 can be disassembled for easy maintenance. The cover 2 is driven by an electric slide rail, allowing for opening / closing operations within 30 seconds.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An ammonia-nitrogen removing electrolytic device with electrode passivation prevention function, characterized in that, It includes an electrolytic cell (1) and an aeration pipe (11); The electrolytic cell (1) has an arc-shaped anode plate (9) and an arc-shaped cathode plate (10) detachably installed on the left and right sides respectively. Two sets of aeration pipes (11) are vertically and rotatably installed on the inside of the electrolytic cell (1) between the arc-shaped anode plate (9) and the arc-shaped cathode plate (10). The two sets of aeration pipes (11) are symmetrically arranged in the electrolytic cell (1). Several sets of branch pipes (19) are fixedly installed on the outer wall of the aeration pipe (11). A connecting arm (17) is fixedly installed on the outer side of the top of the aeration pipe (11). A secondary pipe (18) is vertically fixedly installed at the bottom of the other end of the connecting arm (17). Several sets of air nozzles (20) are fixedly installed on the other end of the branch pipe (19) and the inner wall of the secondary pipe (18). A connecting pipe (15) is fixedly installed on the top of the aeration pipe (11), and a gear disk (12) is fixedly installed on the top of the connecting pipe (15). A bracket (5) is fixedly installed in the center of the rear wall of the electrolytic cell (1). An electric telescopic rod (6) is fixedly installed at the front end of the bracket (5). A toothed plate (7) with toothed grooves on both sides is fixedly installed at the front end of the electric telescopic rod (6). The toothed grooves on the outer walls of the toothed plate (7) on both sides mesh with two sets of gear disks (12).

2. The ammonia and nitrogen removal electrolysis device with electrode passivation prevention function according to claim 1, characterized in that, The electrolytic cell (1) has a socket (8) fixedly installed on the front and rear sides of the inner wall. The socket (8) has slots (14) symmetrically opened on both sides. The arc-shaped anode plate (9) and the arc-shaped cathode plate (10) are respectively inserted into the slots (14).

3. The ammonia and nitrogen removal electrolysis device with electrode passivation prevention function according to claim 1, characterized in that, The bottom of the electrolytic cell (1) and the bottom of the two sets of aeration pipes (11) are provided with annular seats (13), and the bottoms of the two sets of aeration pipes (11) are movably installed in the annular seats (13).

4. The electrolytic device for removing ammonia nitrogen with electrode anti-passivation function according to claim 1, characterized in that, The electrolytic cell (1) is symmetrically provided with caps (2) on both sides of the top, and the two sets of caps (2) are symmetrically installed on both sides of the top of the electrolytic cell (1) via slide rails.

5. The ammonia-nitrogen removal electrolytic device with electrode passivation prevention function according to claim 1, characterized in that, The electrolytic cell (1) has an inlet (3) at the bottom of one side and an outlet (4) at the top of the other side.

6. The ammonia and nitrogen removal electrolysis device with electrode passivation prevention function according to claim 1, characterized in that, The branch pipe (19) and the auxiliary pipe (18) are respectively disposed on the inner and outer sides of the arc-shaped anode plate (9) and the arc-shaped cathode plate (10), and the air nozzles (20) of each group are facing the arc-shaped anode plate (9) and the arc-shaped cathode plate (10).

7. The ammonia and nitrogen removal electrolysis device with electrode passivation prevention function according to claim 1, characterized in that, The aeration pipe (11), branch pipe (19), connecting pipe (15), connecting arm (17), and auxiliary pipe (18) are all interconnected.

8. The ammonia and nitrogen removal electrolysis device with electrode passivation prevention function according to claim 1, characterized in that, A rotary joint (16) is fixedly installed at the center of the top of the gear disk (12), and the bottom of the rotary joint (16) is connected to the connecting pipe (15).

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