Mechanical stirring device for photochemical reaction of magnetic catalyst

Abstract

The utility model belongs to the technical field of photocatalysis, and particularly relates to a mechanical stirring device for photochemical reaction of a magnetic catalyst, which enables the magnetic catalyst to be uniformly dispersed in a liquid phase to be subjected to photochemical reaction under illumination, and solves the problem that the magnetic stirring device system of the traditional photochemical reaction instrument limits the use of the magnetic photocatalyst. The device disclosed by the utility model is particularly suitable for simultaneously carrying out photoreaction of a plurality of test tubes of magnetic catalysts or stirring a common reagent containing a magnetic nano material, can ensure that a magnetic material in a reaction solution is uniformly and stably dispersed and fully participates in the reaction, and ensures that a quantitative test on the catalytic performance of a photocatalytic material is accurately and efficiently carried out; the method has the advantages of convenience, practicability, wide application range, remarkable effect, stable test, high yield, suitability for test tubes with different sizes and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of photocatalysis, in particular to a mechanical stirring device for photochemical reaction of a magnetic catalyst. Background Art

[0002] Photocatalytic technology is based on photocatalytic materials that are sensitive to visible light. It uses sunlight as an energy source and uses the strong light-sensitivity of the catalyst to absorb visible light or ultraviolet light in sunlight to drive the production of reactive oxygen species. The redox ability of reactive oxygen species is then used to achieve photolysis and photosynthesis. At present, photocatalysis has been widely studied and applied in pollutant degradation, water decomposition to produce hydrogen, heavy metal ion reduction, antibacterial cleaning, and organic synthesis due to its advantages of low energy consumption and easy large-scale use. It is one of the emerging international hot research fields.

[0003] Photocatalytic reactions are easily affected by changes in the reaction environment, such as natural factors such as light source intensity, temperature, and uniformity of photocatalysts in the reaction solution, which are easy to cause deviations in the quantitative study of photocatalytic reaction efficiency. Therefore, in order to create rigorous reaction conditions for scientific experimental research and explore the essential mechanism of photoreaction, photochemical reaction instruments came into being. Photocatalytic reaction instruments provide a scientific and rigorous photochemical reaction site for quantitative testing of photocatalytic reaction efficiency. Photocatalytic reaction instruments on the market mainly use xenon lamps and high-pressure mercury lamps with a certain wavelength range as stable light sources to simulate sunlight, equipped with a certain cooling circulation system to control the reaction temperature, and equipped with a stirring device to ensure the uniformity of catalyst dispersion in the reaction solution and receive stable and uniform light. Among them, the stirring system that controls the uniformity of the reaction solution and the uniformity of light is the key guarantee condition for the scientific reliability of photocatalytic reaction experimental data. Common photochemical reaction instruments on the market are mostly equipped with a magnetic stirring system that drives the reaction solution with a magnetically driven rotor.

[0004] When photocatalysts are used in actual factory production, they are mostly dispersed in the solution. After the reaction is completed, they need to be separated through a series of procedures such as complex, time-consuming and labor-intensive centrifugal filtration. Therefore, researchers often combine magnetic materials with catalysts to prepare magnetic catalysts, and easily separate and recover the catalysts by applying a magnetic field to the reaction solution. Magnetic catalysts have irreplaceable advantages in the field of water treatment due to their economy, simplicity and ease of separation, and have received extensive attention and research from researchers. However, the conflict between the magnetic stirring system of traditional photochemical reaction instruments and magnetic catalysts has hindered the research process of magnetic catalysts. In response to this technical defect, the utility model designs a mechanical stirring device for magnetic catalysts, which effectively solves the stirring problem in the photocatalytic research of magnetic catalysts. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the main purpose of the utility model is to provide a mechanical stirring device for photochemical reaction of magnetic catalyst.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A mechanical stirring device for photochemical reaction of a magnetic catalyst, comprising:

[0008] It includes a photochemical reaction box, a lifting system fixed on the top of the photochemical reaction box, a motor drive system fixed below the lifting system, the motor drive system is used to drive the mechanical stirring system to work, and a flat-bottomed quartz test tube placed below the mechanical stirring system for convenient placement and removal of reaction solutions.

[0009] As a preferred embodiment of the mechanical stirring device for magnetic catalyst photochemical reaction described in the utility model, the photochemical reaction box includes a box shell, a xenon lamp, a cold trap and a concave bottom bracket, the cold trap is equipped with a xenon lamp as the light source required for the photochemical reaction, and the cold trap is passed through circulating cooling water and is fixed on the concave bottom of the concave bottom bracket.

[0010] As a preferred embodiment of the mechanical stirring device for photochemical reaction of a magnetic catalyst described in the utility model, the lifting system includes an upper support frame, a support rod, a threaded adjustment rod, a lower support frame, a lifting screw, a connecting rod, a fixed slide rail and a roller; the upper support frame is fixed to the top of the box shell by screws, and by rotating the lifting screw, the connection part between one end of the support rod at both ends of the threaded adjustment rod and the roller moves left and right on the fixed slide rail, so that the parallelogram geometric body formed by the supporting rod through the connecting rod is compressed or expanded, causing the lower support frame to be displaced in the vertical direction to adjust the lifting height.

[0011] As a preferred solution of a mechanical stirring device for a magnetic catalyst photochemical reaction described in the utility model, the motor drive system includes a motor outer box, a speed control knob, a motor controller and a rotating motor. The lower end of the lifting system is fixed with a motor outer box, and there are multiple centrally symmetrical rotating motors inside the motor outer box. The multiple rotating motors are connected in parallel and the power is uniformly controlled by the motor controller. The motor outer box is provided with a speed control knob for direct control of the rotation speed of the multiple rotating motors.

[0012] As a preferred embodiment of a mechanical stirring device for a magnetic catalyst photochemical reaction described in the utility model, the mechanical stirring system includes a coupling, a stirring paddle rod and a stirring paddle, the stirring paddle rod is connected to the motor shaft of a rotating motor through a coupling, and the stirring paddle extends into a flat-bottomed quartz test tube to stir the reaction solution mixed with magnetic material.

[0013] As a preferred solution of the mechanical stirring device for magnetic catalyst photochemical reaction described in the utility model, polytetrafluoroethylene is used as the material of the stirring paddle, which can stir magnetic catalysts or ordinary materials to avoid adverse effects such as magnetic adsorption caused by magnetism.

[0014] As a preferred solution of a mechanical stirring device for a magnetic catalyst photochemical reaction described in the utility model, there are multiple stirring paddles, which are symmetrically distributed around the xenon lamp with the xenon lamp as the geometric center to ensure that the stirred solution is evenly irradiated by the xenon lamp, and the number of stirring paddles is the same as the number of rotating motors.

[0015] As a preferred solution of the mechanical stirring device for magnetic catalyst photochemical reaction described in the utility model, the flat-bottomed quartz test tube is arranged on the plane around the concave bottom of the concave bottom bracket and corresponds to the stirring paddle in the vertical direction.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model proposes a mechanical stirring device for photochemical reaction of magnetic catalyst, so that the magnetic catalyst is evenly dispersed in the liquid phase to receive light and undergo photochemical reaction, solving the problem of the limitation of magnetic photocatalyst in the magnetic stirring device system of traditional photochemical reaction instruments. The utility model device is particularly suitable for simultaneously carrying out photoreaction of magnetic catalysts in multiple test tubes or stirring of common reagents containing magnetic nanomaterials, and can ensure the uniform and stable dispersion of magnetic materials in the reaction solution and their full participation in the reaction, and ensure the accurate and efficient quantitative test of the catalytic performance of photocatalytic materials, and has the advantages of convenience and practicality, wide application range, significant effect, stable test, high yield and applicability to test tubes of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the device of the utility model;

[0020] Figure 2 A top view of the distribution of the rotating motors of the device of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the lifting system of the utility model device;

[0022] Figure 4The utility model is a schematic diagram of the connection between the coupling of the rotating motor and the stirring paddle of the device.

[0023] In the figure, 1-box shell, 2-screws, 3-upper support frame, 4-support rod, 5-threaded adjustment rod, 6-lower support frame, 7-motor outer box, 8-speed control knob, 9-cold trap, 10-flat bottom quartz test tube, 11-xenon lamp, 12-concave bottom bracket, 13-motor controller, 14-rotating motor, 15-coupling, 16-stirring paddle rod, 17-stirring paddle, 18-lifting screw, 19-connecting rod, 20-fixed slide rail, 21-roller.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a mechanical stirring device for a magnetic catalyst photochemical reaction, which is convenient and practical, has a wide range of applications, significant effects, stable testing and high efficiency.

[0027] According to one aspect of the present invention, the present invention provides the following technical solutions:

[0028] like Figure 1-4 As shown, a mechanical stirring device for photochemical reaction of a magnetic catalyst comprises:

[0029] It includes a photochemical reaction box, a lifting system fixed on the top of the photochemical reaction box, a motor drive system fixed below the lifting system, the motor drive system is used to drive the mechanical stirring system to work, and a flat-bottomed quartz test tube placed below the mechanical stirring system for convenient placement and removal of reaction solutions.

[0030] In one embodiment of the utility model, the photochemical reaction box includes a box shell 1, a xenon lamp 11, a cold trap 9 and a concave bottom bracket 12. The cold trap 9 has a xenon lamp 11 as the light source required for the photochemical reaction. The cold trap 9 is passed with circulating cooling water and is fixed on the concave bottom of the concave bottom bracket 12.

[0031] In one embodiment of the utility model, the lifting system includes an upper support frame 3, a support rod 4, a threaded adjustment rod 5, a lower support frame 6, a lifting screw 18, a connecting rod 19, a fixed slide rail 20 and a roller 21; the upper support frame 3 is fixed to the top of the box shell 1 by a screw 2, and by rotating the lifting screw 18, the connection part between one end of the support rod 4 at both ends of the threaded adjustment rod 5 and the roller 21 moves left and right on the fixed slide rail 20, so that the parallelogram geometric body formed by the support rod 4 through the connecting rod 19 is compressed or expanded, causing the lower support frame 6 to be displaced in the vertical direction to adjust the lifting height. Figure 3 The solid line in the middle represents the rising state of the lifting mechanism, and the dotted line represents the descending state of the lifting mechanism.

[0032] In one embodiment of the utility model, the motor drive system includes a motor outer box 7, a speed control knob 8, a motor controller 13 and a rotating motor 14. The motor outer box 7 is fixed at the lower end of the lifting system. There are multiple centrally symmetrical rotating motors 14 inside the motor outer box 7. The multiple rotating motors 14 are connected in parallel and the power is uniformly controlled by the motor controller 13. The motor outer box 7 is provided with a speed control knob 8 for convenient and direct regulation of the rotation speeds of the multiple rotating motors 14.

[0033] In one embodiment of the utility model, the mechanical stirring system includes a coupling 15, a stirring paddle rod 16 and a stirring paddle 17. The stirring paddle rod 16 is connected to the motor shaft of the rotating motor 14 through the coupling 15. The stirring paddle 17 extends into the flat-bottomed quartz test tube 10 to stir the reaction solution mixed with the magnetic material.

[0034] In one embodiment of the present invention, polytetrafluoroethylene is used as the material of the stirring paddle 17, which can stir the catalyst or common materials containing magnetism and avoid adverse effects such as magnetic adsorption caused by magnetism.

[0035] In one embodiment of the present invention, there are multiple stirring paddles 17 symmetrically distributed around the xenon lamp 11 with the xenon lamp 11 as the geometric center to ensure that the stirred solution is evenly irradiated by the xenon lamp 11. The number of stirring paddles 17 is the same as the number of rotating motors 14.

[0036] In one embodiment of the present invention, the flat-bottomed quartz test tube 10 is disposed on a plane around the concave bottom of the concave bottom support 12 and is disposed corresponding to the stirring paddle 17 in the vertical direction.

[0037] When the device of the utility model is in use, it can be operated according to the following procedures: check that the equipment is in a normal state → place a reaction solution test tube → turn on the circulating water to pass through the cold trap → turn on the xenon lamp → turn on the main switch of the motor → rotate the lifting screw to fix the stirring paddle to extend into the solution position (generally one-fourth of the solution height) → rotate the speed knob to a suitable speed → start reaction timing → directly take samples for measurement → adjust the lifting screw to control the height of the stirring paddle to ensure the uniformity of solution stirring → turn off the light source after the reaction is completed → turn off the water circulation after five minutes → remove the reaction test tubes one by one → replace the solution with deionized water or alcohol and put it into the spare test tube → stir and clean the mechanical stirring paddle → turn off the motor control switch → rotate the lifting screw to adjust the stirring paddle to rise → turn off the equipment.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made based on the concept of the present invention and using the contents of the present invention specification, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A mechanical stirring device for photochemical reaction of magnetic catalyst, characterized in that: include: It includes a photochemical reaction box, a lifting system fixed on the top of the photochemical reaction box, a motor drive system fixed below the lifting system, the motor drive system is used to drive the mechanical stirring system to work, and a flat-bottomed quartz test tube placed below the mechanical stirring system for convenient placement and removal of reaction solutions.

2. The mechanical stirring device for photochemical reaction of magnetic catalyst according to claim 1, characterized in that: The photochemical reaction box includes a box shell, a xenon lamp, a cold trap and a concave bottom bracket. The cold trap is equipped with a xenon lamp as a light source required for the photochemical reaction. The cold trap is passed through circulating cooling water and is fixed on the concave bottom of the concave bottom bracket.

3. The mechanical stirring device for photochemical reaction of magnetic catalyst according to claim 2, characterized in that: The lifting system includes an upper support frame, a support rod, a threaded adjustment rod, a lower support frame, a lifting screw, a connecting rod, a fixed slide rail and a roller; the upper support frame is fixed to the top of the box shell by screws, and by rotating the lifting screw, the support rods at both ends of the threaded adjustment rod are connected to the roller and move left and right on the fixed slide rail, so that the parallelogram geometry formed by the supporting rod and the connecting rod is compressed or expanded, causing the lower support frame to be displaced in the vertical direction to adjust the lifting height.

4. The mechanical stirring device for photochemical reaction of magnetic catalyst according to claim 3, characterized in that: The motor drive system includes a motor outer box, a speed control knob, a motor controller and a rotating motor. The motor outer box is fixed at the lower end of the lifting system. There are multiple centrally symmetrical rotating motors inside the motor outer box. The multiple rotating motors are connected in parallel and the power is uniformly controlled by the motor controller. The motor outer box is provided with a speed control knob to facilitate direct control of the speed of multiple rotating motors.

5. The mechanical stirring device for photochemical reaction of magnetic catalyst according to claim 4, characterized in that: The mechanical stirring system includes a coupling, a stirring paddle rod and a stirring paddle. The stirring paddle rod is connected to the motor shaft of the rotating motor through the coupling. The stirring paddle extends into a flat-bottomed quartz test tube to stir a reaction solution mixed with a magnetic material.

6. The mechanical stirring device for photochemical reaction of magnetic catalyst according to claim 5, characterized in that: Polytetrafluoroethylene is used as the material of the stirring paddle, which can stir magnetic catalysts or ordinary materials to avoid adverse effects such as magnetic adsorption caused by magnetism.

7. The mechanical stirring device for photochemical reaction of magnetic catalyst according to claim 6, characterized in that: There are multiple stirring paddles, which are symmetrically distributed around the xenon lamp with the xenon lamp as the geometric center to ensure that the stirred solution is evenly irradiated by the xenon lamp. The number of stirring paddles is the same as the number of rotating motors.

8. The mechanical stirring device for photochemical reaction of magnetic catalyst according to claim 7, characterized in that: The flat-bottom quartz test tube is arranged on a plane around the concave bottom of the concave bottom bracket and corresponds to the stirring paddle in the vertical direction.

Images