Photocatalytic reactor

Abstract

The utility model discloses a photocatalytic reactor to solve the problem that an existing reactor is poor in catalytic effect. The reactor comprises a bracket and a reactor main body, and the bracket is rotationally connected with the reactor main body and is provided with a locking structure; a liquid outlet pipe is arranged at the upper part of the reactor main body, a liquid inlet pipe and a gas inlet pipe are arranged at the lower part, an illumination window is arranged on the front side of the reactor main body, and a quartz reaction pipe is arranged in the reactor main body and internally provided with a solid powder catalyst; the device is simple and compact in structure, small in size, convenient to use and low in cost, the pipe diameter of the tail end of the manifold is smaller than the pipe diameter of the front end of the quartz reaction pipe, impact of the flow speed on a solid powder catalyst is reduced through the variable-diameter design, the contact time of reaction liquid and the catalyst is prolonged, and the catalytic effect is improved; the high-pressure quartz tube and the illumination window are arranged, so that the requirements of high-pressure resistance and light transmission are met, and reaction materials can be saved; by adjusting the angle of the reactor main body, the solid powder catalyst fully contacts and reacts with liquid, and the catalytic effect is improved.

Description

Technical Field

[0001] The present application relates to the field of photocatalytic technology, and in particular to a photocatalytic reactor. Background Art

[0002] Catalytic devices are devices used for catalytic reactions, where a catalyst is used to reduce the activation energy of the reaction, thereby accelerating the reaction rate. Catalytic reactions usually involve chemical changes between gas, liquid, or gas-liquid phases.

[0003] In the existing photocatalytic field, the experimental conditions that can be achieved by the reactors currently used are atmospheric pressure gas-liquid or gas-gas plus light reaction. However, in the field of high-pressure photocatalysis, there are often few devices that can meet this requirement. The equipment that can be achieved is often large in size, complex in structure, and not flexible enough. The conditions that can be met are also relatively limited. Especially when the amount of reaction liquid is relatively small or relatively expensive, the disadvantage of the large diameter of the original reactor has led to an increase in the overall experimental cost and serious waste of materials.

[0004] In addition, there is another problem with the existing reactor. It can only perform gas-liquid mixing or gas-gas-solid reactions, and the reaction tube is usually in a horizontal state. The inventors realized that the problem is that when liquid reactants are added to the reaction tube, the solid catalyst will be carried by the liquid and gather toward the outlet, resulting in accumulation. Usually, it will accumulate at the outlet before the catalytic reaction can be carried out, resulting in a poor catalytic effect. Utility Model Content

[0005] To this end, the present application provides a photocatalytic reactor to solve the problem of poor catalytic effect in existing reactors.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A photocatalytic reactor comprises a bracket and a reactor body arranged on the bracket, wherein the bracket is rotatably connected to the reactor body and is provided with a locking structure, wherein the locking structure is used to lock the rotation angle of the reactor body;

[0008] A liquid outlet pipe is arranged at the upper part of the reactor body, a liquid inlet pipe and an air inlet pipe are arranged at the lower part of the reactor body, the ends of the liquid inlet pipe and the air inlet pipe form a manifold, a light illumination window is arranged at the front of the reactor body, and a quartz reaction tube is arranged inside the reactor body; the front end and the end of the reaction tube are respectively connected to the manifold and the liquid outlet pipe, and the diameter of the end of the manifold is smaller than the diameter of the front end of the quartz reaction tube; a solid powder catalyst is arranged at the inner bottom of the reaction tube.

[0009] Optionally, both the liquid inlet pipe and the air inlet pipe are capillaries.

[0010] Optionally, the reactor body comprises a shell, a cavity is arranged inside the shell, and a water inlet pipe and a water outlet pipe communicating with the cavity are arranged on both sides of the shell.

[0011] Optionally, a reflective coating with a mirror surface is provided on the rear inner wall of the shell at a position corresponding to the cavity.

[0012] Optionally, the reactor body further comprises a connection block connected to the shell, the liquid inlet pipe and the air inlet pipe are both arranged in the connection block, and the liquid inlet pipe and the air inlet pipe are arranged vertically.

[0013] Optionally, the liquid inlet pipe is located at the bottom of the connecting block, and the air inlet pipe is located at the side of the connecting block.

[0014] Optionally, the bracket is connected to the back side of the reactor body via a rotating bolt, and the locking structure is a locking screw, which passes through the side of the reactor body to limit the rotating bolt.

[0015] Optionally, the quartz reaction tube adopts multi-stage sealing, and a sealing ring is arranged on the outside thereof.

[0016] Optionally, the inlet ends of the liquid inlet pipe and the air inlet pipe are both provided with a metering pump system.

[0017] Optionally, filter plates are installed at the front end and the rear end of the reaction tube to prevent the solid powder catalyst from leaking.

[0018] Compared with the prior art, this application has at least the following beneficial effects:

[0019] 1. Based on further analysis and research on the existing technical problems, the present application provides a photocatalytic reactor, including a bracket and a reactor body, the bracket is rotatably connected to the reactor body and is provided with a locking structure; the upper part of the reactor body is provided with a liquid outlet pipe, and the lower part is provided with a liquid inlet pipe and an air inlet pipe, the liquid inlet pipe is fed with liquid-phase material feed, and the air inlet pipe is fed with gas-phase material feed, the front side of the reactor body is provided with a light illumination window, and a quartz reaction tube is provided inside, the front end and the end of the reaction tube are respectively connected with a manifold and a liquid outlet pipe, and a solid powder catalyst is also provided in the reaction tube; the present application has a simple and compact structure, a small size, is easy to use and has a low cost, can realize high-pressure liquid-solid and gas-liquid-solid three-phase reactions, and the ends of the liquid inlet pipe and the air inlet pipe form a manifold , and the end diameter of the manifold is smaller than the front diameter of the quartz reaction tube. The variable diameter design reduces the impact of the flow rate on the solid powder catalyst, increases the contact time between the reaction liquid and the catalyst, and improves the catalytic effect; the reaction tube is a high-pressure quartz reaction tube, and a light window is provided on the front of the reactor body, which not only meets the requirements of high pressure resistance and light transmission, but also saves reaction materials; at the same time, the bracket is connected to the back of the reactor body by a rotating bolt, and by adjusting the angle of the reactor body, the friction force generated by the gravity of the solid powder catalyst in the reaction tube is balanced with the thrust of the liquid entering the reaction tube, thereby achieving a dynamic balance of the solid powder catalyst, so that the solid powder catalyst can fully contact and react with the liquid, further improving the catalytic effect;

[0020] 2. The inner wall of the rear side of the shell of the present application is provided with a reflective coating with a mirror surface at the position corresponding to the cavity, and the reflective coating is designed as a curved surface, and the reaction tube is illuminated from the side through the illumination window provided on the front side of the reactor body, and the reflective coating is provided so that the light entering through the illumination window converges with the reflected light, thereby ensuring the light intensity on the back side of the reaction tube and improving the illumination effect of the reaction;

[0021] 3. The shell of the present application is provided with a cavity inside to form a water layer. A water inlet pipe and a water outlet pipe connected to the cavity are provided on both sides of the shell. When the light is too strong, the temperature of the reaction tube will be too high, thereby destroying the steady state of the reaction. At this time, water is introduced into the cavity and the temperature is controlled by a water bath to ensure that the reaction temperature is at an appropriate value;

[0022] 4. Filters are installed at the front and end of the reaction tube of the present application to prevent the solid powder catalyst in the reaction tube from leaking out. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0024] Figure 1 A schematic diagram of the structure of a photocatalytic reactor provided in one embodiment of the present application Figure 1 ;

[0025] Figure 2 A schematic diagram of the structure of a photocatalytic reactor provided in one embodiment of the present application Figure 2 ;

[0026] Figure 3 for Figure 1 The front view in (without lighting window);

[0027] Figure 4 for Figure 3 The cross-sectional view shown;

[0028] Figure 5 for Figure 3 A schematic diagram of the interior of the reactor body;

[0029] Figure 6 for Figure 1 Side view shown.

[0030] Description of reference numerals:

[0031] 1. bracket; 2. reactor body; 21. shell; 211. cavity; 22. connection block;

[0032] 3. Liquid outlet pipe; 4. Liquid inlet pipe; 5. Air inlet pipe; 6. Manifold; 7. Reaction tube; 8. Lighting window;

[0033] 9. Water inlet pipe; 10. Water outlet pipe; 11. Sealing ring; 12. Rotating bolt; 13. Reflective coating. DETAILED DESCRIPTION

[0034] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0035] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0036] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0037] In one embodiment of the present application, a photocatalytic reactor is Figure 1-Figure 6 As shown, it includes a bracket 1 and a reactor body 2 arranged on the bracket 1, the bracket 1 is rotatably connected to the reactor body 2, so that the reactor body 2 can adjust the angle, and a locking structure is provided, and the locking structure is used to lock the rotation angle of the reactor body 2;

[0038] A liquid outlet pipe 3 is arranged at the upper part of the reactor body 2, and a liquid inlet pipe 4 and an air inlet pipe 5 are arranged at the lower part of the reactor body 2. Liquid-phase material is fed into the liquid inlet pipe 4, and gas-phase material is fed into the air inlet pipe 5. The ends of the liquid inlet pipe 4 and the air inlet pipe 5 form a manifold 6. A light window 8 is arranged on the front of the reactor body 2, and a quartz reaction tube 7 is arranged inside the reactor body 2; the front end and the end of the reaction tube 7 are respectively connected to the manifold 6 and the liquid outlet pipe 3, and the end diameter of the manifold 6 is smaller than the front end diameter of the quartz reaction tube 7; a solid powder catalyst is arranged at the inner bottom of the reaction tube 7.

[0039] Preferably, both the liquid inlet pipe 4 and the air inlet pipe 5 are capillaries; both the liquid inlet pipe 4 and the air inlet pipe 5 are capillaries, so that the feeding of liquid and gas phase materials will be finer, and the two will be better mixed, so as to achieve the purpose of uniform mixing and feeding; then enter the reaction tube 7 through the manifold 6, and since the inner diameter will become larger, the flow rate will slow down. The advantage of a variable diameter design is: reducing the impact of the flow rate on the solid powder catalyst and increasing the contact time between the reaction liquid and the catalyst.

[0040] Preferably, the reactor body 2 includes a shell 21, a cavity 211 is arranged inside the shell 21, forming a water layer located outside the reaction tube 7, and an inlet pipe 9 and an outlet pipe 10 connected to the cavity 211 are arranged on both sides of the shell 21, that is, the inlet pipe 9 and the outlet pipe 10 are arranged opposite to each other.

[0041] Design of the water bath interlayer: Since light has a heating effect, the temperature of the reaction tube 7 will rise, destroying the reaction steady state. In this way, water is introduced into the cavity 211 and the reaction temperature is controlled by the water bath to ensure the reaction temperature.

[0042] Preferably, a reflective coating 13 with a mirror surface is provided on the rear inner wall of the shell 21 at a position corresponding to the cavity 211. Specifically, a coating is provided on the inner wall of the stainless steel shell 21 to form the reflective coating 13, and the reflective coating 13 is designed as a curved surface.

[0043] The reaction tube 7 is illuminated from the side through the illumination window 8 arranged on the front side of the reactor body 2. At the same time, a curved focusing design is adopted on one side of the inner wall of the shell 21 corresponding to the reflective coating 13, and the curvature of the curved surface makes the light entering through the illumination window 8 converge with the reflected light, thereby ensuring the light intensity on the back side of the reaction tube 7.

[0044] Preferably, the bracket 1 is rotatably connected to the reactor body 2 so that the angle of the reactor body 2 is adjustable. The specific adjustment method is: the bracket 1 is connected to the back of the reactor body 2 (specifically the shell 21) by a rotating bolt 12.

[0045] The shell 21 and the bracket 1 are connected by a rotating bolt 12, and the locking structure is a locking screw. The shell 21 and the bracket 1 have threaded holes passing through the rotating bolt 12, and the side of the shell 21 is provided with a mounting hole connected to the threaded hole. The mounting hole is used to install the locking screw. When the angle of the reactor body 2 is adjusted, the locking screw is passed through the mounting hole on the side of the shell 21 to limit the rotating bolt, thereby fixing the angle of the reactor body 2.

[0046] The angle of the reactor body 2 can be adjusted by loosening the bolts so that the friction force of the solid powder catalyst in the reaction tube 7 due to gravity is balanced with the thrust of the liquid, thereby achieving a dynamic balance of the solid powder catalyst. At this time, the angle is fixed by tightening the screws, so that the solid powder catalyst in the reaction tube 7 can fully contact and react with the liquid, thereby improving the catalytic effect.

[0047] Preferably, the quartz reaction tube 7 adopts multi-stage sealing, and a sealing ring 11 is arranged on the outside thereof; the sealing ring 11 has four layers in total, one layer is a rubber pad, and the other three layers are O-rings made of fluororubber. The arrangement of the sealing ring 11 can ensure the sealing of the reactor in a high-pressure environment. At the same time, the quartz reaction tube 7 has the function of resisting high pressure.

[0048] Preferably, the reactor body 2 further comprises a connection block 22 connected to the shell 21 , and the liquid inlet pipe 4 and the air inlet pipe 5 are both arranged in the connection block 22 , and the liquid inlet pipe 4 and the air inlet pipe 5 are arranged vertically.

[0049] Still further preferably, the liquid inlet pipe 4 is located at the bottom of the connecting block 22 , and the air inlet pipe 5 is located at the side of the connecting block 22 .

[0050] Preferably, the inlet ends of the liquid inlet pipe 4 and the air inlet pipe 5 are both provided with metering pump systems for controlling the inlet and outlet volumes and flow rates.

[0051] Preferably, filter sheets are installed at the front end and the end (i.e., the upper and lower ends) of the reaction tube 7 to prevent the solid powder catalyst in the reaction tube 7 from leaking out, and the filter sheets allow the liquid to pass in. In this way, when the liquid enters the quartz reaction tube 7 from bottom to top, the solid powder catalyst inside it will not leak out.

[0052] The working principle of the above embodiment is as follows:

[0053] First, the reactor body 2 is tilted so that the reaction tube 7 inside is slightly in a horizontal position, and then a thin layer of solid powder catalyst is filled inside the reaction tube 7; the gas phase material enters the reaction tube 7 through the air inlet pipe 5 to form a high pressure state, and the liquid phase material enters through the liquid inlet pipe 4, and after being fully mixed with the gas phase material, it enters the manifold 6 and the reaction tube 7 in sequence; at this time, the bubbles generated by the mixture of liquid and gas will continuously push the solid powder catalyst upward, and the angle of the reactor body 2 is adjusted by rotating the bolt 12, so that the reactor body 2 is tilted at a certain angle, and the friction force generated by gravity of the solid powder catalyst in the reaction tube 7 is balanced with the liquid thrust, so that the solid powder catalyst does not accumulate, and then the angle is fixed by the locking structure; then the gas-liquid two-phase mixed fluid reacts under the conditions of light and solid catalyst catalysis, and is discharged through the liquid outlet pipe 3;

[0054] At the same time, when the illumination temperature is too high or too low, water of corresponding temperature is added into the cavity 211 through the water inlet pipe 9, and then the reaction temperature in the reaction tube 7 is ensured by temperature control through a water bath.

[0055] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A photocatalytic reactor, characterized in that: It comprises a bracket and a reactor body arranged on the bracket, wherein the bracket is rotatably connected to the reactor body and is provided with a locking structure, and the locking structure is used to lock the rotation angle of the reactor body; A liquid outlet pipe is arranged at the upper part of the reactor body, a liquid inlet pipe and an air inlet pipe are arranged at the lower part of the reactor body, the ends of the liquid inlet pipe and the air inlet pipe form a manifold, a light illumination window is arranged at the front of the reactor body, and a quartz reaction tube is arranged inside the reactor body; the front end and the end of the reaction tube are respectively connected to the manifold and the liquid outlet pipe, and the diameter of the end of the manifold is smaller than the diameter of the front end of the quartz reaction tube; a solid powder catalyst is arranged at the inner bottom of the reaction tube.

2. The photocatalytic reactor according to claim 1, characterized in that: The liquid inlet pipe and the air inlet pipe are both capillaries.

3. The photocatalytic reactor according to claim 1, characterized in that: The reactor body comprises a shell, a cavity is arranged inside the shell, and a water inlet pipe and a water outlet pipe communicating with the cavity are arranged on both sides of the shell.

4. The photocatalytic reactor according to claim 3, characterized in that: A reflective coating with a mirror surface is arranged on the rear inner wall of the housing at a position corresponding to the cavity.

5. The photocatalytic reactor according to claim 3, characterized in that: The reactor body also includes a connection block connected to the shell, and the liquid inlet pipe and the air inlet pipe are both arranged in the connection block, and the liquid inlet pipe and the air inlet pipe are arranged vertically.

6. The photocatalytic reactor according to claim 5, characterized in that: The liquid inlet pipe is located at the bottom of the connecting block, and the air inlet pipe is located at the side of the connecting block.

7. The photocatalytic reactor according to claim 1, characterized in that: The bracket is connected to the back side of the reactor body through a rotating bolt, and the locking structure is a locking screw. The locking screw passes through the side of the reactor body to limit the rotating bolt.

8. The photocatalytic reactor according to claim 1, characterized in that: The quartz reaction tube adopts multi-stage sealing, and a sealing ring is arranged on the outside thereof.

9. The photocatalytic reactor according to claim 1, characterized in that: The inlet ends of the liquid inlet pipe and the air inlet pipe are both provided with metering pump systems.

10. The photocatalytic reactor according to claim 1, characterized in that: The front end and the rear end of the reaction tube are both equipped with filter sheets to prevent the solid powder catalyst from leaking.

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