Photo-thermal reactor with protective gas
The reactor design with inert gas shielding and flat quartz structure addresses contamination issues by minimizing gas-metal reactions and improving light exposure and temperature monitoring, enhancing reactor performance.
Patent Information
- Application Number
- CN202421685760.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing photothermal reactors are contaminated with the target reaction gas and the metal reactor materials at high temperatures, and the light area is small, resulting in poor reaction effect.
The photothermal reactor design with protective gas is adopted, and the target reaction gas is surrounded by inert gas, entering through the gap between the first quartz tube and the second quartz tube, reducing the contact between the reaction gas and the metal shell, and a flat structure catalyst is used to increase the light area, and the temperature is detected by the temperature measurement quartz tube.
It effectively reduces the reaction between the reaction gas and metal, improves the light uniformity and the light receiving area of the catalyst, enhances the reaction effect, and can monitor the temperature in real time.
Smart Images
Figure CN223096748U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of photothermal catalytic reaction, and particularly relates to a photothermal reactor with a protective gas. Background Art
[0002] Photochemical and photocatalytic oxidation methods are advanced oxidation technologies that have been studied extensively. A photocatalytic reaction refers to a chemical reaction that occurs under the action of light. A photochemical reaction requires a molecule to absorb electromagnetic radiation of a specific wavelength, be excited to generate a molecular excited state, and then a chemical reaction occurs to form new substances or become intermediate chemical products that initiate thermal reactions. The activation energy of a photochemical reaction comes from the energy of photons, and photoelectric conversion and photochemical conversion have always been active research fields in the utilization of solar energy.
[0003] Currently, existing photothermal reactors have a vertical structure, including a metal outer shell and a quartz inner cylinder placed inside the lower half of the metal outer shell for catalyst filling. The target reaction gas is introduced into the upper end of the metal outer shell. After the target reaction gas passes through the quartz inner cylinder and comes into full contact with the catalyst, the reaction product gas is discharged from the bottom of the metal outer shell. However, when some reaction gases react with the metal at high temperatures, it causes pollution of the reaction product gas. If the overall reactor is made of quartz, the cost is high and it cannot withstand pressure, so further improvement is needed. Utility Model Content
[0004] In order to reduce the possibility of the target reaction gas reacting with the metal at high temperatures, this application provides a photothermal reactor with a protective gas.
[0005] The photothermal reactor with a protective gas provided by this application adopts the following technical solutions:
[0006] A photothermal reactor with a protective gas includes a metal outer shell, a first quartz tube fixedly penetrating through the upper end of the metal outer shell, and a second quartz tube placed inside the metal outer shell. The first quartz tube has a target reaction gas inlet, the side wall of the metal outer shell has a protective gas inlet above the second quartz tube, the lower part of the first quartz tube is inserted into the upper part of the second quartz tube, and there is a gap between the lower part of the first quartz tube and the upper part of the second quartz tube for the protective gas to flow into the inner cavity of the second quartz tube. The second quartz tube is filled with a catalyst located below the first quartz tube, and the metal outer shell has a reaction product gas outlet communicating with the inner cavity of the second quartz tube.
[0007] By adopting the above technical solution, the target reaction gas enters the inner cavity of the first quartz tube from the target reaction gas inlet and then enters the second quartz tube. At the same time, the inert gas enters the inner cavity of the metal shell from the protective gas inlet. The inert gas flows into the second quartz tube through the gap between the lower part of the first quartz tube and the upper part of the second quartz tube, forming a phenomenon that the inert gas surrounds the target reaction gas entering the second quartz tube, thereby reducing the possibility of the target reaction gas reacting with the metal on the metal shell at high temperature. The inert gas and the reaction product gas that has completed the reaction are discharged together from the reaction product gas outlet.
[0008] Preferably, the second quartz tube includes a reaction tube filled with a catalyst, a diversion tube fixedly connected to the upper end of the reaction tube, and an extension tube fixedly connected to the lower end of the reaction tube. The inner diameter of the diversion tube is larger than that of the reaction tube. The lower part of the first quartz tube is inserted into the diversion tube, and a catalyst carrier for preventing the catalyst from falling is arranged on the upper part of the extension tube.
[0009] By adopting the above technical solution, the lower part of the first quartz tube is inserted into the diversion tube, and the inner diameter of the diversion tube is larger than that of the reaction tube, which is convenient for the inert gas to surround the target reaction gas and enter the second quartz tube.
[0010] Preferably, the reaction tube is arranged in a flat shape.
[0011] By adopting the above technical solution, the flat structure can make the catalyst thinner, and all the catalysts can receive light, with uniform light and greatly increased light-receiving area. It solves the problem that the catalyst is too thick and the light cannot irradiate the internal catalyst, and also solves the problem of too small light-irradiating area of the existing reactor and poor experimental effect.
[0012] Preferably, a temperature-measuring thermocouple inserted into the inner cavity of the extension tube is fixedly penetrated through the lower end of the metal shell.
[0013] By adopting the above technical solution, a temperature-measuring thermocouple is added, which is convenient for detecting the gas temperature in the extension tube.
[0014] Preferably, a temperature-measuring quartz tube inserted into the inner cavity of the extension tube is fixedly penetrated through the lower end of the metal shell, and the temperature-measuring thermocouple is coaxially and fixedly inserted into the temperature-measuring quartz tube. The temperature-measuring quartz tube inserted into the inner cavity of the extension tube is fixedly penetrated through the lower end of the metal shell, and the temperature-measuring thermocouple is coaxially and fixedly inserted into the temperature-measuring quartz tube.
[0015] By adopting the above technical solution, the temperature-measuring thermocouple is placed inside the temperature-measuring quartz tube, and the temperature-measuring quartz tube can directly extend to the lower part of the reaction tube without occupying the catalyst loading space.
[0016] Preferably, the upper end of the temperature-measuring quartz tube abuts against the catalyst carrier.
[0017] By adopting the above technical solution, the upper end of the temperature-measuring quartz tube abuts against the catalyst carrier, further reducing the possibility of the catalyst falling.
[0018] Preferably, the catalyst carrier is a quartz sand plate or quartz wool.
[0019] Preferably, a light irradiation port for irradiating the catalyst is formed in the side wall of the metal shell, a light-transmitting window plate for closing the light irradiation port is fixed to the metal shell, and a light guide tube communicating with the light irradiation port is fixedly connected to the metal shell.
[0020] By adopting the above technical solution, the light source irradiates the catalyst in the second quartz tube through the light guide tube and the light-transmitting window plate in sequence, improving the catalytic reaction effect.
[0021] In summary, the utility model has the following beneficial effects:
[0022] 1. The target reaction gas enters the inner cavity of the first quartz tube from the target reaction gas inlet and then enters the second quartz tube. At the same time, the inert gas enters the inner cavity of the metal shell from the protective gas inlet, and the inert gas flows into the second quartz tube through the gap between the lower part of the first quartz tube and the upper part of the second quartz tube, forming a phenomenon that the inert gas surrounds the target reaction gas entering the second quartz tube, thereby reducing the possibility of the target reaction gas reacting with the metal on the metal shell at high temperature. The inert gas and the reaction product gas after the reaction are discharged together from the reaction product gas outlet;
[0023] 2. The flat structure can make the catalyst thinner, all the catalysts can receive light, the light is uniform, and the light-receiving area is greatly increased. It solves the problems that the catalyst is too thick and the light cannot irradiate the internal catalyst, and solves the problems of too small light-irradiating area and poor experimental effect of the existing reactor;
[0024] 3. The upper end of the temperature-measuring quartz tube abuts against the catalyst carrier, further reducing the possibility of the catalyst falling. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is an overall structural schematic diagram of a photothermal reactor with protective gas;
[0026] Figure 2 is a structural schematic diagram of the second quartz tube;
[0027] Figure 3 is a flat surface structural schematic diagram of the diversion tube and the reaction tube;
[0028] Figure 4 is a connection structural schematic diagram of the temperature-measuring quartz tube, the lower mounting seat and the lower sealing joint.
[0029] In the figure, 1 is the metal shell; 11 is the upper mounting seat; 12 is the lower mounting seat; 13 is the protective gas inlet; 14 is the light inlet; 15 is the light-transmitting window plate; 16 is the light guide tube; 17 is the upper sealing joint; 18 is the lower sealing joint; 19 is the reaction product gas outlet; 2 is the first quartz tube; 21 is the target reaction gas inlet; 3 is the second quartz tube; 31 is the reaction tube; 32 is the diversion tube; 33 is the extension tube; 34 is the catalyst carrier; 4 is the light source irradiator; 5 is the temperature-measuring quartz tube; 51 is the temperature-measuring thermocouple. Detailed implementation mode
[0030] The following is further detailed description of this application in combination with the attached Figures 1-4 drawings.
[0031] An embodiment of this application discloses a photothermal reactor with protective gas. Refer to Figure 1 the figure, which includes a metal shell 1, a first quartz tube 2 fixedly penetrating through the upper end of the metal shell 1, and a second quartz tube 3 disposed inside the metal shell 1.
[0032] An upper mounting seat 11 is fixedly connected to the upper part of the inner cavity of the metal shell 1, a lower mounting seat 12 is fixedly connected to the lower part of the inner cavity of the metal shell 1, and there is an air flow gap between the outer wall of one side of the upper mounting seat 11 and the inner side wall of the metal shell 1. The first quartz tube 2 is fixedly penetrated through the upper part of the metal shell 1, and the first quartz tube 2 is fixedly penetrated through the upper mounting seat 11. The upper part of the first quartz tube 2 extends out of the upper end of the metal shell 1, and the upper end pipe orifice of the first quartz tube 2 is the target reaction gas inlet 21. A protective gas inlet 13 is provided on the side wall of the metal shell 1 above the upper mounting seat 11.
[0033] Light inlets 14 are provided on the middle parts of the opposite side walls of the side wall of the metal shell 1. The metal shell 1 is fixed with a light-transmitting window plate 15 that closes the light inlets 14. Specifically, the light-transmitting window plate 15 is a sapphire window plate. The metal shell 1 is fixedly connected with a light guide tube 16 communicating with the light inlets 14, and a light source irradiator 4 is externally connected to the end of the light guide tube 16.
[0034] Refer to Figure 2 and Figure 3, the second quartz tube 3 includes a reaction tube 31 filled with a catalyst and located below the first quartz tube 2, a diversion tube 32 fixedly connected to the upper end of the reaction tube 31, and an extension tube 33 fixedly connected to the lower end of the reaction tube 31. The reaction tube 31 is located at the position directly opposite to the light inlet 14. Both the diversion tube 32 and the reaction tube 31 are arranged in a flat shape, with the light directly facing the flat surface of the reaction tube 31. The inner cavity thickness dimension of the diversion tube 32 is greater than that of the reaction tube 31, and the lower part of the reaction tube 31 is provided with a reduced diameter. The lower part of the first quartz tube 2 is inserted into the diversion tube 32. The lower end surface of the first quartz tube 2 is higher than the bottom inner wall of the diversion tube 32, and there is a gap between the outer peripheral wall of the lower part of the first quartz tube 2 and the inner side wall of the diversion tube 32 for the protective gas to flow into the inner cavity of the second quartz tube 3.
[0035] Refer to Figure 1 , Figure 2 , a catalyst carrier 34 for preventing the catalyst from falling is provided at the upper part of the extension tube 33. The catalyst carrier 34 can be a quartz sand plate or quartz wool. In this embodiment, the catalyst carrier 34 is quartz wool, and the quartz wool is plugged into the upper part of the extension tube 33. The lower part of the extension tube 33 is fixedly inserted into the lower mounting seat 12. A temperature-measuring quartz tube 5 is fixedly penetrated through the lower end of the metal shell 1. The temperature-measuring quartz tube 5 is fixedly penetrated through the lower mounting seat 12 and is inserted into the inner cavity of the extension tube 33. The upper end of the temperature-measuring quartz tube 5 abuts against the catalyst carrier 34. The lower end of the temperature-measuring quartz tube 5 extends out of the lower end of the metal shell 1, and a temperature-measuring thermocouple 51 is fixedly inserted into the temperature-measuring quartz tube 5.
[0036] Refer to Figure 1 , Figure 4 , an upper sealing joint 17 that is hermetically sleeved on the upper part of the first quartz tube 2 is fixed to the upper end of the metal shell 1, and a lower sealing joint 18 that is hermetically sleeved on the lower part of the temperature-measuring quartz tube 5 is fixed to the lower end of the metal shell 1. The lower sealing joint 18 has a reaction product gas outlet 19 communicating with the lower port of the extension tube 33.
[0037] The implementation principle of a photo-thermal reactor with a protective gas in an embodiment of this application is as follows: The target reaction gas enters the inner cavity of the first quartz tube 2 from the target reaction gas inlet 21 and then enters the reaction tube 31 through the diversion tube 32. At the same time, the inert gas enters the inner cavity of the metal shell 1 from the protective gas inlet 13. The inert gas flows into the reaction tube 31 from the gap between the lower part of the first quartz tube 2 and the diversion tube 32, forming a phenomenon that the inert gas surrounds the target reaction gas entering the reaction tube 31, thereby reducing the possibility of the target reaction gas reacting with the metal on the metal shell 1 at high temperature. After the inert gas and the target reaction gas pass through the catalyst and the catalyst carrier 34 together, the gas is discharged together from the reaction product gas outlet 19.
[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A photothermal reactor with protective gas, characterized in that: It includes a metal shell (1), a first quartz tube (2) fixedly inserted through the upper end of the metal shell (1), and a second quartz tube (3) disposed inside the metal shell (1). The first quartz tube (2) has a target reaction gas inlet (21). The side wall of the metal shell (1) has a protective gas inlet (13) located above the second quartz tube (3). The lower part of the first quartz tube (2) is inserted into the upper part of the second quartz tube (3). There is a gap between the lower part of the first quartz tube (2) and the upper part of the second quartz tube (3) for the protective gas to flow into the inner cavity of the second quartz tube (3). The second quartz tube (3) is filled with a catalyst located below the first quartz tube (2). The metal shell (1) has a reaction product gas outlet (19) communicating with the inner cavity of the second quartz tube (3).
2. The photothermal reactor with protective gas according to claim 1, wherein: The second quartz tube (3) includes a reaction tube (31) filled with a catalyst, a diversion tube (32) fixedly connected to the upper end of the reaction tube (31), and an extension tube (33) fixedly connected to the lower end of the reaction tube (31). The inner diameter of the diversion tube (32) is larger than that of the reaction tube (31). The lower part of the first quartz tube (2) is inserted into the diversion tube (32). A catalyst carrier (34) for preventing the catalyst from falling is provided at the upper part of the extension tube (33).
3. The photothermal reactor with a protective gas according to claim 2, characterized in that: The reaction tube (31) is arranged in a flat shape.
4. A photothermal reactor with a protective gas according to claim 2, characterized in that: A temperature-measuring thermocouple (51) is fixedly inserted through the lower end of the metal shell (1) and inserted into the inner cavity of the extension tube (33).
5. The photothermal reactor with protective gas according to claim 4, characterized in that: A temperature-measuring quartz tube (5) is fixedly inserted through the lower end of the metal shell (1) and inserted into the inner cavity of the extension tube (33). The temperature-measuring thermocouple (51) is coaxially and fixedly inserted into the temperature-measuring quartz tube (5).
6. The photothermal reactor with protective gas according to claim 5, wherein: The upper end of the temperature-measuring quartz tube (5) abuts against the catalyst carrier (34).
7. A photothermal reactor with a protective gas according to claim 2, characterized in that: The catalyst carrier (34) is a quartz sand plate or quartz wool.
8. A photothermal reactor with protective gas according to claim 1, characterized in that: A light irradiation port (14) for irradiating the catalyst is provided on the side wall of the metal shell (1). A light-transmitting window plate (15) for closing the light irradiation port (14) is fixed to the metal shell (1). The metal shell (1) is fixedly connected with a light guide cylinder (16) communicating with the light irradiation port (14).