Photocatalytic reaction experimental equipment

Abstract

The utility model provides photocatalytic reaction experimental equipment which comprises a photocatalytic reaction device and a light source system, a six-channel photocatalytic reaction chamber is formed between a reaction chamber partition plate and a shell, and an independent quartz reaction tube and an independent magnetic stirrer are arranged in each reaction chamber. Due to the design of the multiple reaction chambers, the device can carry out multiple same or different photocatalytic reaction experiments at the same time, the experiment efficiency is greatly improved, the experiment time and cost are reduced, meanwhile, through cooperation of the quartz cold trap, the xenon lamp and the rotating table, when photocatalytic reaction is carried out, the rotating table rotates back and forth, and the reaction efficiency is improved. Rotation of the quartz cold trap and the xenon lamp is guaranteed, system errors caused by different transmitted illumination intensities due to non-uniform light emitted by the light source to each photocatalytic reaction chamber and non-uniform manufacturing of the quartz cold trap are reduced, accuracy is improved, repeatability of photocatalytic experiments is facilitated, and the photocatalytic effect is improved. And the catalytic performance of each photocatalyst can be accurately compared at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of photocatalysis, in particular to a photocatalytic reaction experimental device. Background Art

[0002] The treatment of organic pollutants in water bodies is a major challenge in the field of water treatment, especially difficult-to-degrade and non-biodegradable organic pollutants that are difficult to treat with traditional treatment methods. Currently, the degradation of the above-mentioned organic pollutants based on photocatalytic technology has been widely studied in the laboratory, and many photocatalysts with excellent performance have been developed.

[0003] A photocatalytic device is required to evaluate the performance of photocatalysts. However, most existing photocatalytic devices only have one photocatalytic reaction chamber, and experiments need to be repeated sequentially to obtain data. Multiple photocatalytic reaction chambers are prone to uneven lighting, resulting in inaccurate evaluation results and large errors.

[0004] In view of this, the inventor specially designed a photocatalytic reaction experimental equipment, which resulted in this case. Utility Model Content

[0005] In order to solve the above problems, the technical solution of the present utility model is as follows:

[0006] A photocatalytic reaction experimental device, comprising:

[0007] A photocatalytic reaction device comprises a base plate, a shell and a reaction chamber partition, wherein the base plate is located at the bottom of the shell, the reaction chamber partition is located inside the shell, the reaction chamber partition comprises a plurality of splicing plates, the plurality of splicing plates are interconnected to form a regular polygon, a longitudinal edge of each splicing plate is provided with an outwardly extending partition plate, one side of the partition plate is fixed to the splicing plate, and the other side is fixed to the inner wall of the shell, a plurality of photocatalytic reaction chambers are formed between each of the splicing plates, each partition plate and the shell, each of the splicing plates is provided with a reaction hole, a quartz reaction tube is placed inside each of the photocatalytic reaction chambers, a magnetic stirrer is provided on the base plate and matched with the plurality of quartz reaction tubes one by one, a quartz cold trap is placed at the center of the regular polygon enclosed by the splicing plates, and a rotating table for rotating the quartz cold trap is provided at the center of the base plate;

[0008] The light source system includes a light source controller and a xenon lamp. The light source controller is arranged on one side of the photocatalytic reaction device. The light source controller and the xenon lamp are connected through wires. The xenon lamp is placed inside a quartz cold trap and fixedly connected to the quartz cold trap.

[0009] Preferably, a light shielding sheet and a filter are respectively provided on the inner and outer sides of the regular polygon enclosed by the splicing plate, and the light shielding sheet and the filter cover the reaction hole. The light shielding sheet and the filter are detachably connected to the splicing plate.

[0010] Preferably, a light shield is provided on the top of the quartz reaction tube.

[0011] Preferably, support plates are installed on both sides of the magnetic stirrer, and the photocatalytic reaction device also includes a bottom limit plate and a top limit plate. The bottom limit plate is arranged above the support plate, and the top limit plate is arranged above the reaction chamber partition. The bottom limit plate and the top limit plate are both provided with a number of accommodating holes for the quartz reaction tube to pass through.

[0012] Preferably, a circulating cooling device is also included, which includes an inner circulation water tank, an outer circulation water tank, a first serpentine reflux condenser and a second serpentine reflux condenser, the first serpentine reflux condenser and the second serpentine reflux condenser are arranged in the outer circulation water tank, an inner circulation pump is provided in the inner circulation water tank, the inner circulation pump is connected to the quartz cold trap and the first serpentine reflux condenser respectively through a rubber hose, an outer circulation pump is provided in the outer circulation water tank, the outer circulation pump is connected to the second serpentine reflux condenser through a rubber hose, the first serpentine reflux condenser is connected to the inner circulation pump and the second serpentine reflux condenser respectively through a rubber hose, the inner circulation water tank, the first serpentine reflux condenser, the second serpentine reflux condenser and the inner circulation pump constitute an inner circulation water system, and the outer circulation water tank, the first serpentine reflux condenser, the second serpentine reflux condenser and the outer circulation pump constitute an outer circulation water system.

[0013] Preferably, the inner circulation water tank is a closed water tank, and the outer circulation water tank is an open water tank.

[0014] The technical solution provided by the utility model has the following beneficial effects:

[0015] The utility model forms a plurality of photocatalytic reaction chambers between a reaction chamber partition and an outer shell, and each reaction chamber has an independent quartz reaction tube and a magnetic stirrer. This multi-reaction chamber design enables the device to carry out a plurality of identical or different photocatalytic reaction experiments at the same time, greatly improving the experimental efficiency and reducing the experimental time and cost. At the same time, through the cooperation of the quartz cold trap, the xenon lamp and the rotating table, the rotating table rotates back and forth when the photocatalytic reaction is carried out, ensuring the rotation of the quartz cold trap and the xenon lamp, reducing the system error caused by the uneven light emission of the light source to each photocatalytic reaction chamber and the uneven production of the quartz cold trap, resulting in different light intensity transmitted, improving the accuracy, and being beneficial to the repeatability of the photocatalytic experiment, and the catalytic performance of each photocatalyst can be accurately compared at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] in:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic structural diagram of the photocatalytic reaction device in the utility model;

[0020] Figure 3 This is an exploded view of the photocatalytic reaction device in the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the reaction chamber partition in the utility model;

[0022] Figure 5 This is a schematic cross-sectional view of the circulating cooling device of the present invention;

[0023] Figure 6 It is a partial cross-sectional structural diagram of the first serpentine reflux condenser and the second serpentine reflux condenser in the utility model.

[0024] Description of labels:

[0025] 1. Photocatalytic reaction device; 11. Bottom plate; 12. Housing; 13. Reaction chamber partition; 131. Reaction chamber unit; 132. Splicing plate; 133. Spacer plate; 134. Reaction well; 14. Quartz cold trap; 15. Rotating table; 16. Support plate; 17. Bottom limit plate; 18. Top limit plate; 19. Receiving hole; 2. Light source system; 21. Light source controller; 22. Xenon lamp; 23. Electrical wires; 3. Circulating cooling device; 31. Internal circulation water tank; 32. External circulation water tank; 33. First serpentine reflux condenser; 331. First inner tube water inlet; 332. First inner tube water outlet; 333. First outer tube water inlet; 334. First outer tube water outlet; 34. Second serpentine reflux condenser; 341. Second inner tube water inlet; 342. Second inner tube water outlet; 343. Second outer tube water inlet; 344. Second outer tube water outlet; 35. Rubber hose; 36. Internal circulation pump; 37. External circulation pump; 4. Photocatalytic reaction chamber; 41. Quartz reaction tube; 42. Magnetic stirrer; 43. Shading plate; 44. Filter; 45. Shading hood. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] See also Figures 1 to 6 , is a photocatalytic reaction experimental device as the best embodiment of the utility model, comprising:

[0028] The photocatalytic reaction device 1 includes a bottom plate 11, a shell 12 and a reaction chamber partition 13. The bottom plate 11 is located at the bottom of the shell 12, and the reaction chamber partition 13 is located inside the shell 12. The reaction chamber partition 13 includes a plurality of splicing plates 132, and the plurality of splicing plates 132 are connected to each other to form a regular polygon. Each splicing plate 132 has a longitudinal edge provided with an outwardly extending partition plate 133. One side of the partition plate 133 is fixed to the splicing plate 132, and the other side is fixed to the inner wall of the shell 12. A plurality of photocatalytic reaction chambers 4 are formed between each splicing plate 132, each partition plate 133 and the shell 12. In this embodiment, the photocatalytic reaction chambers 4 are set to 6, and each splicing plate 132 is provided with a reaction hole 134. Stone is placed inside each photocatalytic reaction chamber 4. The base plate 11 is provided with a magnetic stirrer 42 that matches each of the quartz reaction tubes 41. A quartz cold trap 14 is placed in the center of the regular polygon formed by the splicing plate 132. A rotating table 15 for rotating the quartz cold trap 14 is provided in the center of the base plate 11. In this embodiment, the quartz reaction tube 41 has a capacity of 700 ml, and the number of photocatalytic reaction chambers 4 is 6, which can simultaneously carry out 6 high-capacity photocatalytic tests. The high reaction capacity effectively avoids photocatalyst weighing errors during the photocatalytic reaction and errors in catalyst concentration changes due to continuous sampling. Reactants can be placed inside the quartz reaction tube 41, and the magnetic stirrer 42 on the base plate 11 cooperates with it to ensure that the reactants are fully and evenly stirred in the quartz reaction tube 41. This helps to better contact and mix the reactants, improve the reaction rate and efficiency, ensure that the photocatalytic reaction is carried out in a uniform environment, and avoid problems such as local reactions being too fast or too slow due to uneven distribution of reactants.

[0029] The light source system 2 includes a light source controller 21 and a xenon lamp 22. The light source controller 21 is arranged on one side of the photocatalytic reaction device 1. The light source controller 21 and the xenon lamp 22 are connected by an electric wire 23. The xenon lamp 22 is placed inside the quartz cold trap 14 and is fixedly connected to the quartz cold trap 14. Through the cooperation of the quartz cold trap 14, the xenon lamp 22 and the rotating table 15, when the photocatalytic reaction is carried out, the rotating table 15 rotates clockwise for one circle each time, then counterclockwise for one circle, and moves back and forth. The rotating table 15 drives the quartz cold trap 14 to rotate, wherein the photocatalytic reaction chamber 4 remains fixed and does not rotate, ensuring that the quartz cold trap 14 and the xenon lamp 22 rotate, thereby reducing the system error caused by the uneven light emission from the light source to each photocatalytic reaction chamber 4 and the uneven production of the quartz cold trap 14, resulting in different light intensity transmitted.

[0030] Please refer to Figures 1 to 4 The photocatalytic reaction chamber 4 comprises a separate reaction chamber unit 131, which houses a quartz reaction tube 41. The regular polygonal layout ensures that each reaction chamber unit 131 is equidistant from the center. When using a central light source (such as the xenon lamp 22 within the quartz cold trap 14), the quartz reaction tubes 41 within each reaction chamber unit 131 receive relatively uniform illumination. This helps improve the efficiency of the photocatalytic reaction and ensures experimental repeatability and reliability.

[0031] Please refer to Figures 1 to 4 A reaction hole 134 for irradiation by a xenon lamp 22 is provided in the middle of the splicing plate 132. A light shielding sheet 43 and a filter 44 are respectively affixed to the inner and outer sides of the regular polygon enclosed by the splicing plate 132. The light shielding sheet 43 and the filter 44 cover the reaction hole 134. The light shielding sheet 43 and the filter 44 are detachably connected to the splicing plate 132. A light shielding cover 45 is provided on the top of the quartz reaction tube 41. A xenon lamp 22 that simulates sunlight is used as a light source. By selecting a suitable filter 44, the output wavelength range of the light source can be flexibly adjusted. The light shielding sheets 43 on both sides of the splicing plate 132 can effectively block stray light from non-target directions from entering the reaction chamber, ensuring that only the light from the xenon lamp 22 is accurately irradiated into the quartz reaction tube 41 through the reaction hole 134. This reduces the interference of light and improves the accuracy and repeatability of the photocatalytic reaction. The setting of the light shielding sheet 43 and the light shielding cover 45 can ensure the progress of the dark reaction. Existing photocatalytic experimental devices often lack the conditions for the dark reaction, or the dark reaction is carried out before turning on the light source. However, considering that the light intensity emitted after the light source is turned on is not stable, the light source needs to be turned on 15 minutes to 20 minutes in advance during the light reaction stage to ensure the stability of the light source. Therefore, the light shielding sheet 43, the light shielding cover 45 and the appropriate reaction chamber design are designed to ensure the stable progress of the dark reaction and the light reaction.

[0032] For details, please refer to Figure 3, support plates 16 are installed on both sides of the magnetic stirrer 42, and the photocatalytic reaction device 1 also includes a bottom limit plate 17 and a top limit plate 18. The bottom limit plate 17 is arranged above the support plate 16, and the top limit plate 18 is arranged above the reaction chamber partition 13. The bottom limit plate 17 and the top limit plate 18 are both provided with a number of accommodating holes 19 for the quartz reaction tube 41 to pass through. The support plates 16 on both sides of the magnetic stirrer 42 can effectively enhance the installation stability of the magnetic stirrer 42 and prevent it from being displaced or shaken due to vibration or external force during operation, thereby ensuring the uniformity and stability of stirring. The top limit plate 18 is arranged above the reaction chamber partition 13, and cooperates with the reaction chamber partition 13 and the bottom limit plate 17 to form a stable frame structure, making the entire equipment more firm and reliable, able to withstand the effects of various forces during the experiment, and reducing the risk of equipment deformation.

[0033] For details, please refer to Figure 1 、 Figure 5 and Figure 6 , also includes a circulating cooling device 3, the circulating cooling device 3 includes an inner circulating water tank 31, an outer circulating water tank 32, a first serpentine reflux condenser 33 and a second serpentine reflux condenser 34, the first serpentine reflux condenser 33 and the second serpentine reflux condenser 34 are arranged in the outer circulating water tank 32, an inner circulating water tank 31 is provided with an inner circulating pump 36, the inner circulating pump 36 is connected to the quartz cold trap 14 and the first serpentine reflux condenser 33 respectively through a rubber hose 35, an outer circulating water tank 32 is provided with an outer circulating pump 37, the outer circulating pump 37 is connected to the second serpentine reflux condenser 34 through a rubber hose 35, the first serpentine reflux condenser 33 is connected to the inner circulating pump 36 and the second serpentine reflux condenser 34 respectively through a rubber hose 35, and an efficient cooling effect can be achieved through the coordinated work of the inner circulating water tank 31 and the outer circulating water tank 32. An internal circulation pump 36 delivers the coolant to the quartz cold trap 14 and the first serpentine reflux condenser 33, while an external circulation pump 37 further cools the coolant through the second serpentine reflux condenser 34. This dual-circulation design ensures that the coolant circulates efficiently throughout the system, quickly removing the heat generated during the reaction. The design of the first and second serpentine reflux condensers 33 and 34 increases the contact area between the coolant and the heat source, improving heat exchange efficiency. The serpentine structure allows the coolant to reside longer within the tubes, allowing it to more fully absorb heat, resulting in more efficient cooling.

[0034] For details, please refer to Figure 1 、 Figure 5 and Figure 6The inner circulation water tank 31, the first serpentine reflux condenser 33, the second serpentine reflux condenser 34 and the inner circulation pump 36 constitute an inner circulation water system, and the outer circulation water tank 32, the first serpentine reflux condenser 33, the second serpentine reflux condenser 34 and the outer circulation pump 37 constitute an outer circulation water system. The inner circulation water tank 31 is a closed water tank, and the outer circulation water tank 32 is an open water tank. The first serpentine reflux condenser 33 and the second serpentine reflux condenser 34 have serpentine inner tubes and outer tubes. The serpentine inner tube of the first serpentine reflux condenser 33 is provided with a first inner tube water inlet 331 and a first inner tube water outlet 332. The outer tube of the first serpentine reflux condenser 33 is provided with a first outer tube water inlet 333 and the first outer tube water outlet 334, the serpentine inner tube of the second serpentine reflux condenser 34 is provided with a second inner tube water inlet 341 and a second inner tube water outlet 342, the outer tube of the second serpentine reflux condenser 34 is provided with a second outer tube water inlet 343 and a second outer tube water outlet 344, in the inner circulating water system, the first inner tube water inlet 331 is connected to the inner circulating pump 36 through a rubber hose 35, the first inner tube water outlet 332 is connected to the second inner tube water inlet 341 through a rubber hose 35, the second inner tube water outlet 342 is connected to the quartz cold trap 14 through a rubber hose 35, the inner circulating pump 36 inhales water, and enters the serpentine through the rubber hose 35 from the first inner tube water inlet 331 The water flows out from the first inner tube outlet 332 of the serpentine inner tube, passes through the rubber hose 35 and the second inner tube inlet 341 into the serpentine inner tube of the second serpentine reflux condenser 34, completes the cooling, and then enters the quartz cold trap 14 from the second inner tube outlet 342 through the rubber hose 35. Finally, the water in the quartz cold trap 14 flows into the inner circulation water tank 31 through the rubber hose 35 to complete the circulation. The inner circulation water tank 31 is basically sealed, which can effectively avoid the problem of deionized water in the inner circulation contacting with the outside world and the deterioration of water quality resulting in a decrease in light transmittance, thereby ensuring the stability of the long-lasting photocatalytic experiment. In the external circulation water system, the second outer tube inlet Water inlet 343 is connected to an external circulation pump 37 via a rubber hose 35. The second external pipe water outlet 344 is connected to the first external pipe water inlet 333 via a rubber hose 35. The external circulation pump 37 draws in water, which then enters the outer pipe of the second serpentine reflux condenser 34 through the second external pipe water inlet 343 for cooling. The water is then discharged through the second external pipe water outlet 344, then reenters the outer pipe through the first external pipe water inlet 333 for cooling, and finally flows into the external circulation water tank 32 through the first external pipe water outlet 334, completing the external circulation. The external circulation water tank 32 is open, allowing ice to be added to accelerate heat dissipation. The temperature of the external circulation coolant can be flexibly adjusted according to the laboratory ambient temperature and reaction requirements. This flexibility enables the entire cooling system to adapt to different experimental conditions and environmental changes, further optimizing the cooling effect.

[0035] The experimental process is as follows: Before the experiment, add the magnet and 500mL of the target pollutant solution into the quartz reaction tube 41, and place the quartz reaction tube 41 on the magnetic stirrer 42. After adding the photocatalyst, cover it with the light shield 45, put in the light shielding sheet 43, turn on the magnetic stirrer 42, and start the dark reaction. The magnetic stirrer 42 makes the photocatalyst evenly dispersed in the target pollutant solution, always ensuring that the catalyst concentration and the volume ratio of the target pollutant solution are consistent. After the photocatalyst is saturated with the target pollutant in the water, the dark reaction ends. About 15 to 20 minutes before the end of the dark reaction, turn on the light source controller 21, light the xenon lamp 22, and start the internal circulation pump 36 and the external circulation pump 37 at the same time. Continuously add plastic bottles filled with ice cubes to the external circulation water tank 32 to ensure that the cooling circulation system continues to cool. When the dark reaction is finished, the light shield 43 is removed, the filter 44 is placed, and the rotating table 15 is turned on to rotate the quartz cold trap 14 and the xenon lamp 22. After a specific reaction time, the light shield 45 is removed to take samples and test the concentration of the target pollutant.

[0036] To sum up, the utility model forms several photocatalytic reaction chambers 4 between the reaction chamber partition 13 and the outer shell 12, and each reaction chamber has an independent quartz reaction tube 41 and a magnetic stirrer 42. This multi-reaction chamber design allows the equipment to carry out multiple identical or different photocatalytic reaction experiments at the same time, greatly improving the experimental efficiency and reducing the experimental time and cost. At the same time, through the cooperation of the quartz cold trap 14, the xenon lamp 22 and the rotating table 15, when the photocatalytic reaction is carried out, the rotating table 15 rotates back and forth to ensure the rotation of the quartz cold trap 14 and the xenon lamp 22, reducing the system error caused by the uneven light emission from the light source to each photocatalytic reaction chamber 4 and the uneven production of the quartz cold trap 14, resulting in different light intensity transmitted. While improving the accuracy, it is beneficial to the repeatability of the photocatalytic experiment and can accurately compare the catalytic performance of each photocatalyst at the same time.

[0037] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A photocatalytic reaction experimental device, characterized in that: include: A photocatalytic reaction device (1) comprises a bottom plate (11), a shell (12) and a reaction chamber partition (13), wherein the bottom plate (11) is located at the bottom of the shell (12), the reaction chamber partition (13) is located inside the shell (12), and the reaction chamber partition (13) comprises a plurality of splicing plates (132), wherein the plurality of splicing plates (132) are connected to each other to form a regular polygon, and a partition plate (133) extending outward is provided on the longitudinal edge of each splicing plate (132), and one side of the partition plate (133) is fixed to the splicing plate (132) and the other side is fixed to the inner wall of the shell (12), and a spacer (133) is formed between each splicing plate (132), each partition plate (133) and the shell (12). A plurality of photocatalytic reaction chambers (4), each of the splicing plates (132) is provided with a reaction hole (134), a light shielding plate (43) and a filter plate (44) are provided on the inner and outer sides of a regular polygon enclosed by the splicing plates (132), a quartz reaction tube (41) is placed inside each of the photocatalytic reaction chambers (4), a magnetic stirrer (42) matched one-to-one with the plurality of quartz reaction tubes (41) is provided on the bottom plate (11), a quartz cold trap (14) is placed at the center of the regular polygon enclosed by the splicing plates (132), a rotating table (15) for rotating the quartz cold trap (14) is provided at the center of the bottom plate (11), and a light shielding cover (45) is provided on the top of the quartz reaction tube (41); A light source system (2) comprises a light source controller (21) and a xenon lamp (22), wherein the light source controller (21) is arranged on one side of the photocatalytic reaction device (1), the light source controller (21) and the xenon lamp (22) are connected via an electric wire (23), and the xenon lamp (22) is placed inside a quartz cold trap (14) and fixedly connected to the quartz cold trap (14).

2. A photocatalytic reaction experimental device according to claim 1, characterized in that: The light shielding sheet (43) and the filter sheet (44) cover the reaction hole (134), and the light shielding sheet (43) and the filter sheet (44) are detachably connected to the splicing plate (132).

3. The photocatalytic reaction experimental equipment according to claim 1, characterized in that: Support plates (16) are installed on both sides of the magnetic stirrer (42). The photocatalytic reaction device (1) also includes a bottom limit plate (17) and a top limit plate (18). The bottom limit plate (17) is arranged above the support plate (16), and the top limit plate (18) is arranged above the reaction chamber partition (13). The bottom limit plate (17) and the top limit plate (18) are both provided with a plurality of accommodating holes (19) for the quartz reaction tube (41) to pass through.

4. The photocatalytic reaction experimental equipment according to claim 1, characterized in that: The invention also includes a circulating cooling device (3), wherein the circulating cooling device (3) includes an inner circulating water tank (31), an outer circulating water tank (32), a first serpentine reflux condenser (33) and a second serpentine reflux condenser (34), wherein the first serpentine reflux condenser (33) and the second serpentine reflux condenser (34) are arranged in the outer circulating water tank (32), an inner circulating pump (36) is arranged in the inner circulating water tank (31), and the inner circulating pump (36) is connected to the quartz cold trap (14) and the first serpentine reflux condenser (33) through a rubber hose (35), and the outer circulating water tank (32) is provided with an outer circulating pump (36). 7), the outer circulation pump (37) is connected to the second serpentine reflux condenser (34) through a rubber hose (35), the first serpentine reflux condenser (33) is connected to the inner circulation pump (36) and the second serpentine reflux condenser (34) through a rubber hose (35), the inner circulation water tank (31), the first serpentine reflux condenser (33), the second serpentine reflux condenser (34) and the inner circulation pump (36) constitute an inner circulation water system, and the outer circulation water tank (32), the first serpentine reflux condenser (33), the second serpentine reflux condenser (34) and the outer circulation pump (37) constitute an outer circulation water system.

5. The photocatalytic reaction experimental equipment according to claim 4, characterized in that: The inner circulation water tank (31) is a closed water tank, and the outer circulation water tank (32) is an open water tank.

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