Photoelectrochemical coupling device for photoassisted electrochemical oxidation

Abstract

The utility model provides a kind of photo-assisted electrochemical oxidation photoelectric coupling experimental device, belong to water treatment advanced oxidation experimental research technical field.The device core includes photochemical reactor and electrochemical reactor.Electrochemical reactor is used for electrode material performance test or for electrolysis to produce oxidant.Photochemical reactor is made of cylindrical high boron silicon material, light source is placed in quartz sleeve to isolate electrolyte and is fixed in the center of reactor, for light source performance test or for photolysis to generate active substance.Electrochemical reactor and photochemical reactor are connected by an adjustable circulating pump of flow rate and realize electrolyte exchange.The experimental device is designed for the lack of photoelectric coupling research device currently, by changing electrode material, light source, experimental parameter, the effect, kinetics and key influencing factor of key components and reaction condition on photo-assisted electrochemical oxidation advanced oxidation technology degradation pollutant are researched.

Description

Technical Field

[0001] This utility model relates to the field of advanced oxidation experimental research technology in water treatment, and in particular to a photoelectric coupling experimental device for photo-assisted electrochemical oxidation. Background Technology

[0002] Currently, photoelectrocatalytic devices, photocatalyst devices, and combinations of photocatalysis and oxidants such as ozone have been studied for pollutant degradation. However, these methods and devices suffer from limited processing capacity, high power consumption leading to significant carbon emissions, and low treatment efficiency. Traditional electrochemical oxidation technology has attracted widespread attention due to its ease of operation and lack of reagent requirements, but it also suffers from high energy consumption and low efficiency in pollutant degradation. Photoelectrochemical coupling technology, which combines these two methods, is currently a hot research topic. This method combines photochemical oxidation and electrochemical oxidation to generate strong oxidants such as ozone, active chlorine, and hydrogen peroxide in situ. Under irradiation, these oxidants generate various free radicals that synergistically degrade pollutants, offering advantages such as high efficiency, energy saving, and environmental friendliness. However, this method has not yet been applied in practice and requires extensive research and experimentation, but specialized experimental equipment is currently lacking. Summary of the Invention

[0003] The purpose of this invention is to provide a photoelectric coupling experimental device for photo-assisted electrochemical oxidation, which aims to simultaneously perform photocatalytic and electrocatalytic reactions in one experimental device, thereby combining the two methods.

[0004] This invention provides a photoelectric coupling experimental device for photo-assisted electrochemical oxidation. The photoelectric coupling experimental device includes a main body, a photochemical reactor, and an electrochemical reactor. The photochemical reactor and the electrochemical reactor are located on both sides of the main body. A circulating water pump, an air pump, and a power supply are arranged vertically at intervals inside the main body. The circulating water pump is connected to the inside of the photochemical reactor and the electrochemical reactor through a T-joint and pipeline. The air pump and the power supply are connected to the electrochemical reactor. The bottom of the main body is also provided with a water inlet and a water outlet. The main body is connected to the inner layer of the photochemical reactor and the electrochemical reactor through the water inlet, the water outlet, and pipeline, and a coolant is circulated. A magnetic stirrer is also provided at the bottom of the photochemical reactor.

[0005] Furthermore, the main body of the device is also equipped with a control panel, which has a main switch, indicator lights and an emergency stop switch. The main switch, indicator lights and emergency stop switch are all electrically connected to the power supply. The main body of the device is also equipped with a drain valve, which is connected to a T-joint.

[0006] Furthermore, the electrochemical reactor is a double-jacketed reactor made of glass. The outer layer is provided with an electrochemical reaction coolant outlet and an electrochemical reaction coolant inlet. The electrochemical reaction coolant outlet is connected to the water outlet through a silicone tube, and the electrochemical reaction coolant inlet is connected to the photochemical reactor. The electrochemical reactor is provided with an anode and a cathode. The cathode extends out of a pipe and is fixed in the middle of the electrochemical rubber plug and connected to a gas pump. Two tabs extend from the top of the anode and are fixed to the electrochemical rubber plug. The electrochemical rubber plug is fixed at the port of the electrochemical reactor and is also provided with a sampling needle. The inner layer is also provided with an electrochemical reaction water outlet and an electrochemical reaction water inlet. The electrochemical reaction water outlet is connected to a circulating water pump, and the electrochemical reaction water inlet is connected to the photochemical reactor.

[0007] Furthermore, the photochemical reactor has a double-jacketed structure. The outer layer is provided with a photoreaction coolant outlet and a photoreaction coolant inlet. The photoreaction coolant outlet is connected to the electroreaction coolant inlet via a pipeline. The photoreaction coolant inlet is connected to the water inlet. The inner layer is provided with a light source. The light source is covered with a quartz sleeve. The quartz sleeve is fixed to the inner layer by a photochemical rubber stopper. The inner layer is also provided with a photoreaction water inlet and a photoreaction water outlet. The photoreaction water inlet is connected to a T-joint. The photoreaction water outlet is connected to the electrochemical reactor. A rotor is also placed at the bottom of the inner layer of the photochemical reactor. The main body of the device is also provided with a ballast. The ballast is connected to the light source and the power supply.

[0008] Furthermore, a rotor flow meter is connected between the photoreaction inlet and the T-connector. The rotor flow meter has a flow meter inlet and a flow meter outlet. The flow meter inlet is connected to the T-connector, and the flow meter outlet is connected to the photoreaction inlet.

[0009] Furthermore, the air pump is also equipped with a gas flow meter and a speed control knob.

[0010] Furthermore, the circulating water pump is connected to a regulator, which is located on the right side wall of the main body of the device.

[0011] Furthermore, the power supply is equipped with a positive clamp and a negative clamp, with the positive clamp connected to the anode and the negative clamp connected to the cathode.

[0012] Compared with the prior art, the technical solution adopted by this utility model has the following beneficial effects: In this application, the main body of the device with a protective shell can better accommodate the connected silicone tubing and power cord, saving space and ensuring the convenience and safety of operation when connecting various devices. The electrochemical reactor can generate active chlorine and ozone in situ at the anode and hydrogen peroxide in situ at the cathode, increasing the strong oxidant in the device and reducing transportation costs. The photochemical reactor can irradiate the strong oxidant generated in situ by the electrochemical reactor to generate more oxidizing hydroxyl radicals, chlorine radicals, singlet oxygen, and more secondary radicals, improving the degradation efficiency of the reaction device and achieving complete degradation of pollutants in a short time. A gas flow meter is installed at the front of the air pump to control the speed of air entering the water. A circulating water pump connects the photochemical reactor and the electrochemical reactor to achieve orderly circulation of the liquid. A magnetic stirrer can ensure uniform mixing of the liquid in the photochemical reactor, ensuring the uniformity of the reaction. The power supply can power the anode and cathode of the electrochemical reactor and control the water pump, light source, and magnetic stirrer, saving space and making the reaction device lightweight. Attached Figure Description

[0013] Figure 1 A first-view structural schematic diagram of a photoelectric coupling experimental device for photo-assisted electrochemical oxidation provided by this utility model; Figure 2 A side cross-sectional view of a photoelectric coupling experimental device for photo-assisted electrochemical oxidation provided by this utility model; Figure 3 A partial cross-sectional view of an aerated electrochemical reactor, a photoelectric coupling experimental device for photo-assisted electrochemical oxidation, provided by this utility model. Figure 4 A partial cross-sectional view of a photochemical reactor for a photo-assisted electrochemical oxidation photocoupled experimental device provided by this utility model; 1. Main body of the device; 11. Main switch; 12. Indicator light; 13. Emergency stop switch; 14. Drain valve; 15. Inlet; 16. Outlet; 2. Electrochemical reactor; 21. Anode; 22. Cathode; 23. Sampling needle; 24. Electrochemical rubber stopper; 25. Electrochemical reaction coolant outlet; 26. Electrochemical reaction coolant inlet; 27. Electrochemical reaction outlet; 28. Electrochemical reaction inlet; 3. Photochemical reactor; 31. Light source; 32. Quartz sleeve; 33. Photochemical... 34. Rubber stopper; 35. Photoreaction coolant outlet; 36. Photoreaction inlet; 37. Photoreaction coolant inlet; 38. Ballast; 4. Photoreaction outlet; 5. Air pump; 6. Gas flow meter; 7. Speed ​​control knob; 8. Circulating water pump; 9. Regulator; 10. T-connector; 11. Magnetic stirrer; 12. Rotor; 13. Power supply; 14. Positive clamp; 15. Negative clamp; 16. Rotor flow meter; 17. Flow meter inlet; 18. Flow meter outlet. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0015] A photoelectric coupling experimental device for photo-assisted electrochemical oxidation, such as Figure 1-4 As shown, the device includes: a main body 1; an electrochemical reactor 2, placed on the left side of the main body; a photochemical reactor 3, placed on the right side of the main body; an air pump 4, placed on the upper part of the main body, with its outlet connected to the cathode of the electrochemical reactor; a circulating water pump 5, located inside the device and connected to a T-connector 6; a magnetic stirrer 7, located at the bottom of the photochemical reactor and hidden in the base of the device; and a power supply 8, located in the upper part of the device.

[0016] The outer shell of the main body 1 of the device is welded from color-coated steel plates, and in the embodiments of this utility model, such as Figure 1 As shown, the main body 1 of the device includes a main switch 11, an emergency stop switch 13, a power switch, a circulating water pump switch, and a light source switch. The main switch 11 and indicator light 12 are connected to the main power supply 8 to control the entire reaction device; the emergency stop switch 13 is connected to the power supply 8 to quickly cut off power in case of emergencies. Figure 2 As shown, the power supply 8 is placed on the upper layer inside the main body 1 of the device, and the T-connector 6 and the circulating water pump 5 are placed on the lower layer to achieve dry and wet separation and avoid leakage. The drain valve 14 of the entire reaction device is located on the lower left of the main body 1 of the device and is connected to the T-connector. Cooling water enters the reaction device through the inlet 15 and is connected to the outlet of the constant temperature water bath. Cooling water is discharged from the reaction device through the outlet 16 and is connected to the inlet of the constant temperature water bath to form a circulation.

[0017] like Figure 3As shown, the electrochemical reactor 2 is a double-layered, jacketed glass structure used for electrode material performance testing or for electrolytic generation of oxidants. The jacket contains circulating cooling water to simulate actual operating conditions. The outer electrochemical reactor cooling liquid outlet 25 (upper outer layer) serves as the cooling water outlet for the electrochemical reactor 1, connected to the cooling water outlet 16 via a silicone tube. The outer electrochemical reactor cooling liquid inlet 26 (lower outer layer) is the inlet, connected to the photochemical reactor cooling water outlet 34 (upper outer layer) via a silicone tube passing through the entire reactor base. The anode 21 and the porous cathode 22 are coaxially placed inside the electrochemical reactor 2 with an electrode spacing of 1 cm, and are connected to the positive and negative terminals of the power supply, respectively. The sampling needle 23 is fixed to the electrochemical rubber plug 24 at the top of the electrochemical reactor to facilitate sampling for testing and re-sampling for experiments. The electrochemical reactor outlet 27 (lower inner) is connected to the circulating water pump 5. The electrochemical reactor inlet 28 (upper inner) is the inlet, fixed to the electrochemical rubber plug 24, and connected to the photochemical reactor photochemical reactor outlet 38.

[0018] Power supply 8 provides a DC regulated power supply for the electrochemical reactor. The power supply is equipped with a positive clamp and a negative clamp. The positive clamp is connected to the anode, and the negative clamp is connected to the cathode.

[0019] like Figure 4 As shown, the photochemical reactor 3 is a double-layered jacketed high borosilicate glass reactor used for light source performance testing or for photolysis to generate active substances. The outer layer is for circulating condensate. The photochemical reactor coolant inlet 36 is the condensate inlet of the photochemical reactor and is connected to the inlet 15. The photochemical reactor coolant outlet 34 is the outlet and is connected to the electrochemical reactor coolant inlet 26. The light source 31 is placed inside the quartz sleeve 32 and fixed on the photochemical rubber stopper 33. The light source 31 is connected to the ballast 37 to control the current and prevent excessive current from damaging the light source 31. The photochemical reactor inlet 35 is the inlet of the photochemical reactor and is connected to the rotor flowmeter outlet 92. The photochemical reactor outlet 38 is the outlet of the photochemical reactor and is connected to the electrochemical reactor inlet 28.

[0020] The air pump 4 includes an air pump 4, a gas flow meter 41, and a speed control knob 42. It is used to supply gas to the electrochemical reactor. The air outlet is on the left side of the back of the air pump and is connected to the cathode 22 through a silicone tube. The air inlet is on the right side. In order to control the air flow rate, the gas flow meter is fixed on the left side of the air pump. The speed control knob 42 increases when turned counterclockwise and decreases when turned counterclockwise.

[0021] like Figure 2As shown, to better achieve liquid circulation, a circulating water pump 5 is placed between the electrochemical reactor 2 and the photochemical reactor 3. The circulating water pump 5 is used for liquid connection between the electrochemical reactor and the photochemical reactor, and the flow rate is controlled by a regulator 51. The liquid enters the electrochemical reactor 2, and the outlet 27 of the electrochemical reactor is the outlet of the electrochemical reactor 2. It is connected to the circulating water pump 5 through a silicone tube. The circulating water pump 5 is connected to a T-joint 6, which is connected to the flow meter inlet 91 of the rotor flow meter 9. The flow meter outlet 92 is connected to the photochemical reactor inlet 35 of the photochemical reactor. The photochemical reactor outlet 38 is the outlet of the photochemical reactor 3 and is connected to the electrochemical reactor inlet 28 of the electrochemical reactor. This realizes the circulation process of liquid from the electrochemical reactor 2 to the photochemical reactor 3 and back to the electrochemical reactor 2. To ensure uniform and homogenized liquid mixing, the magnetic stirrer 7 is placed at the bottom of the photochemical reactor 3, and the rotor 71 is placed at the bottom of the inner layer of the photochemical reactor. To reduce the distribution effect of various components, each component is controlled by power supply 8, thus reducing the problem of wire tangling.

[0022] A photoelectric coupling experimental device for photo-assisted electrochemical oxidation is operated as follows: Anode 21 and cathode 22 are coaxially placed in electrochemical reactor 2 and fixed with rubber stopper 24. Anode 21 is connected to the positive terminal 81 of the power supply, and cathode 22 is connected to the negative terminal 82. Light source 31 is connected to ballast 37, fitted into quartz sleeve 32, and coaxially placed in photochemical reactor 3 with rubber stopper 33. The prepared solution is added to electrochemical reactor 2. The main switch 11 is turned on. After indicator light 12 illuminates, the circulating water pump knob is rotated counterclockwise to control the flow rate through rotor flowmeter 9, filling the entire reactor with liquid. The magnetic stirrer 7 is turned on and circulated for 10 minutes to mix the solution evenly. After the temperature stabilizes and the mixture is evenly mixed, the light source, power supply, and circulating air pump knobs are rotated counterclockwise in sequence to control the gas flow rate and conduct the degradation experiment. After degradation is completed, the light source, power supply, and circulating air pump knobs are rotated clockwise in sequence, the main power supply 8 is turned off, and the drain valve 14 is opened to drain the treated water.

[0023] In summary, the main body 1 of the device with a protective shell can better accommodate the connecting silicone tubing and power cord, saving space, and connecting various devices ensures convenience and safety during operation. The electrochemical reactor 2 can generate active chlorine, ozone, and other oxidants in situ at the anode, and hydrogen peroxide in situ at the cathode, increasing the strong oxidant concentration in the device and reducing transportation costs. The photochemical reactor 3 can irradiate the strong oxidants generated in situ by the electrochemical reactor to generate more oxidizing hydroxyl radicals, chlorine radicals, singlet oxygen, and more secondary radicals, improving the degradation efficiency of the reaction device and achieving complete degradation of pollutants in a short time. The air pump 4, with a gas flow meter installed at its front, can control the speed of air entering the water. The circulating water pump 5 connects the photochemical reactor and the electrochemical reactor, achieving orderly liquid circulation. The magnetic stirrer 7 ensures uniform mixing of the liquid in the photochemical reactor, guaranteeing the homogeneity of the reaction. Power supply 8 can supply power to the anode and cathode of the electrochemical reactor, and can also control the water pump, light source, and magnetic stirrer, saving space and making the reaction device lighter. With the above settings, a better experimental device can be provided for the research of photochemical oxidation technology and electrochemical oxidation technology. By controlling various parameters in the reaction, a large number of experimental studies can be carried out on the reaction to obtain the optimal parameters and optimal variables of the reaction, providing experimental support for photoelectric coupling technology.

Claims

1. A photoelectric coupling experimental device for photo-assisted electrochemical oxidation, characterized in that, The photoelectric coupling experimental device includes a main body (1), a photochemical reactor (3) and an electrochemical reactor (2). The photochemical reactor (3) and the electrochemical reactor (2) are located on both sides of the main body (1). The main body (1) is equipped with a circulating water pump (5), an air pump (4) and a power supply (8) at intervals along the vertical direction. The circulating water pump (5) is connected to the inside of the photochemical reactor (3) and the electrochemical reactor (2) through a T-joint (6) and a pipeline. The air pump (4) and the power supply (8) are connected to the electrochemical reactor (2). The bottom of the main body (1) is also equipped with an inlet (15) and an outlet (16). The main body (1) is connected to the jacket of the photochemical reactor (3) and the electrochemical reactor (2) through the inlet (15), the outlet (16) and the pipeline, and is circulated with coolant. The bottom of the photochemical reactor (3) is also equipped with a magnetic stirrer (7).

2. The photoelectric coupling experimental device for photo-assisted electrochemical oxidation according to claim 1, characterized in that, The device body (1) is also equipped with a control panel, which is equipped with a main switch (11), an indicator light (12) and an emergency stop switch (13). The main switch (11), indicator light (12) and emergency stop switch (13) are all electrically connected to the power supply (8). The device body (1) is also equipped with a drain valve ((14), which is connected to a T-joint (6).

3. The photoelectric coupling experimental device for photo-assisted electrochemical oxidation according to claim 1, characterized in that, The electrochemical reactor (2) is a double-jacketed reactor made of glass. The outer layer is provided with an electrochemical reaction coolant outlet (25) and an electrochemical reaction coolant inlet (26). The electrochemical reaction coolant outlet (25) is connected to the water outlet (16) through a silicone tube, and the electrochemical reaction coolant inlet (26) is connected to the photochemical reactor (3). The electrochemical reactor (2) is provided with an anode (21) and a cathode (22). The cathode (22) extends out of the pipe and is fixed in the middle of the electrochemical rubber plug (24). It is connected to the air pump (4). Two tabs extend from the top of the anode (21) and are fixed to the electrochemical rubber plug (24). The electrochemical rubber plug (24) is fixed to the port of the electrochemical reactor (2). The electrochemical rubber plug (24) is also provided with a sampling needle (23). The inner layer is also provided with an electro-reaction outlet (27) and an electro-reaction inlet (28). The electro-reaction outlet (27) is connected to the circulating water pump (5), and the electro-reaction inlet (28) is connected to the photochemical reactor (3).

4. The photoelectric coupling experimental device for photo-assisted electrochemical oxidation according to claim 3, characterized in that, The photochemical reactor (3) is a double-layer jacketed structure. The outer layer is provided with a photoreaction coolant outlet (34) and a photoreaction coolant inlet (36). The photoreaction coolant outlet (34) is connected to the electroreaction coolant inlet (26) through a pipeline. The photoreaction coolant inlet (36) is connected to the water inlet (15). The inner layer is provided with a light source (31). The light source (31) is covered with a quartz sleeve (32). The quartz sleeve (32) is fixed to the inner layer by a photochemical rubber stopper (33). The inner layer is also provided with a photoreaction water inlet (35) and a photoreaction water outlet (38). The photoreaction water inlet (35) is connected to a T-joint. The photoreaction water outlet (38) is connected to the electrochemical reactor (2). The bottom of the inner layer of the photochemical reactor (3) is also provided with a rotor (71). The main body (1) of the device is also provided with a ballast (37). The ballast (37) is connected to the light source (31) and the power supply (8).

5. The photoelectric coupling experimental device for photo-assisted electrochemical oxidation according to claim 4, characterized in that, A rotor flowmeter (9) is also connected between the photo-reaction inlet (35) and the T-connector. The rotor flowmeter (9) is equipped with a flowmeter inlet (91) and a flowmeter outlet (92). The flowmeter inlet (91) is connected to the T-connector, and the flowmeter outlet (92) is connected to the photo-reaction inlet (35).

6. The photoelectric coupling experimental device for photo-assisted electrochemical oxidation according to claim 1, characterized in that, The air pump (4) is also equipped with a gas flow meter (41) and a speed control knob (42).

7. The photoelectric coupling experimental device for photo-assisted electrochemical oxidation according to claim 1, characterized in that, The circulating water pump (5) is connected to a regulator (51), and the regulator (51) is located on the right side wall of the main body (1) of the device.

8. The photoelectric coupling experimental device for photo-assisted electrochemical oxidation according to claim 3, characterized in that, The power supply (8) is equipped with a positive clamp (81) and a negative clamp (82). The positive clamp (81) is connected to the anode (21); the negative clamp (82) is connected to the cathode (22).

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