Vacuum heat collecting tube with window and photo-thermal catalytic reaction device thereof

Abstract

This utility model relates to a vacuum heat collection tube with a window and its photothermal catalytic reaction device, belonging to the field of photothermal equipment technology. The vacuum heat collection tube with a window includes an outer glass tube and an inner glass tube, with a vacuum interlayer between the outer and inner glass tubes. The inner glass tube is filled with a heating medium, and a selective absorption layer is provided on the outer surface of the inner glass tube. A light-transmitting window that allows light to pass through is opened on the selective absorption layer. By using this structure, light can pass through the light-transmitting window and directly enter the interior of the inner glass tube, realizing the synergistic utilization of solar photothermal conversion and direct illumination. This allows chemical reactions requiring light and heat conditions to be supported inside the vacuum heat collection tube, resulting in high efficiency in the utilization of light and heat energy without damaging the glass tube substrate and ensuring the sealing of the vacuum interlayer.

Description

Technical Field

[0001] This utility model belongs to the field of photothermal equipment technology, and specifically relates to a vacuum heat collection tube with a window and its photothermal catalytic reaction device. Background Technology

[0002] Vacuum collector tubes are the core component of solar thermal utilization devices. They consist of inner and outer double-layered glass tubes, with a high vacuum created between the two tubes to minimize heat loss. Their core function is to absorb sunlight through a selective absorption coating and convert it into heat energy. Traditional vacuum collector tubes have a single function; the inner tube surface is completely covered by an absorption coating, allowing only light absorption and no light transmission. They heat the medium by absorbing light through the coating, but cannot support the chemical reaction requiring direct light and heat.

[0003] Therefore, a windowed vacuum heat collection tube and its photothermal catalytic reaction device that can achieve synergistic utilization of light and heat and high energy utilization rate are urgently needed. Utility Model Content

[0004] This invention provides a vacuum heat collection tube with a window and its photothermal catalytic reaction device to solve the technical problems in the prior art where the vacuum heat collection tube cannot obtain direct light and cannot support chemical reactions that require light and heat.

[0005] This utility model is achieved through the following technical solution: a vacuum heat collection tube with a window, comprising an outer glass tube and an inner glass tube, wherein a vacuum interlayer is formed between the outer glass tube and the inner glass tube, the inner glass tube is filled with a heating medium, a selective absorption layer is provided on the outer surface of the inner glass tube, and a light-transmitting window that allows light to pass through is provided on the selective absorption layer.

[0006] To better realize this utility model, the above structure is further optimized, and the shape of the light-transmitting window is rectangular, circular, or annular.

[0007] To better realize this utility model, the above structure is further optimized, and the light-transmitting window is located at the lower, middle or upper part of the inner glass tube.

[0008] To better realize this utility model, the above structure is further optimized, and the selective absorption layer is a selective light-transmitting film or a selective absorption coating.

[0009] To better realize this utility model, the above structure is further optimized, and the heating medium is a low heat capacity medium.

[0010] A photothermal catalytic reaction device includes a reaction tube, an external light source, and a vacuum heat collection tube. The reaction tube is disposed in the inner glass tube of the vacuum heat collection tube, and a reaction area is provided at one end of the reaction tube. The reaction area is aligned with the light-transmitting window. The external light source is disposed on one side of the outer glass tube of the vacuum heat collection tube, and the external light source shines directly on the reaction area through the light-transmitting window.

[0011] To better realize this utility model, the above structure is further optimized by including a plug, which is sealed and fixed at the inlet end of the vacuum heat collection tube, and the end of the reaction tube away from the reaction area is sealed and connected to the plug.

[0012] To better realize this utility model, further optimizations are made to the above structure, wherein the external light source is an LED light source, a xenon lamp light source, or a mercury lamp light source.

[0013] Compared with the prior art, this utility model has the following advantages: The vacuum solar collector tube with a window provided by this utility model includes an outer glass tube and an inner glass tube, with a vacuum interlayer between the outer and inner glass tubes. The inner glass tube is filled with a heating medium, and a selective absorption layer is provided on the outer surface of the inner glass tube. A light-transmitting window that allows light to pass through is opened on the selective absorption layer. With this structure, by opening a light-transmitting window on the selective absorption layer, light can pass through the light-transmitting window and directly enter the interior of the inner glass tube, realizing the synergistic utilization of solar thermal conversion and direct illumination. This allows chemical reactions requiring light and heat conditions to be supported inside the vacuum solar collector tube, resulting in high efficiency in the utilization of light and heat energy without damaging the glass tube substrate and ensuring the sealing of the vacuum interlayer, making this utility model more practical.

[0014] This invention also provides a photothermal catalytic reaction device, including a reaction tube, an external light source, and a vacuum heat collection tube. The reaction tube is disposed in the inner glass tube of the vacuum heat collection tube, and a reaction area is provided at one end of the reaction tube. The reaction area is aligned with a light-transmitting window. The external light source is disposed on one side of the outer glass tube of the vacuum heat collection tube. The external light source shines directly on the reaction area through the light-transmitting window. With this structure, the external light source shines directly on the reaction area through the light-transmitting window, thereby enabling photothermal catalytic reactions requiring direct illumination to occur inside the inner glass tube, expanding the function of the vacuum heat collection tube and maximizing energy utilization. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the vacuum heat collection tube with a window in this utility model; Figure 2 This is a schematic diagram of the photothermal catalytic reaction device in this utility model.

[0017] In the picture: 1-Outer glass tube; 2-Inner glass tube; 3-Vacuum interlayer; 4-Heating medium; 5-Selective absorption layer; 6-Light-transmitting window; 7-Reaction tube; 8-External light source; 9-Reaction zone; 10-Plug. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Example 1: In this embodiment, a vacuum heat collection tube with a window, such as Figure 1As shown, it includes an outer glass tube 1 and an inner glass tube 2. A vacuum interlayer 3 is formed between the outer glass tube 1 and the inner glass tube 2. The vacuum interlayer 3 is used to suppress heat loss caused by air convection and heat conduction. The inner glass tube 2 is filled with a heating medium 4. The heating medium 4 is a low heat capacity medium, such as a gas, preferably air, which has good light transmittance, reduces thermal relaxation, and enables rapid heating and cooling. A selective absorption layer 5 is provided on the outer surface of the inner glass tube 2. The selective absorption layer 5 preferentially absorbs light within a specific wavelength range. A light-transmitting window 6 is provided on the selective absorption layer 5 to allow light of the entire wavelength to directly penetrate into the inner glass tube 2.

[0022] By adopting this structure, light can be transmitted through the light-transmitting window 6 on the selective absorption layer 5 and directly into the glass inner tube 2 through the light-transmitting window 6, realizing the synergistic utilization of solar thermal conversion and direct illumination. This allows chemical reactions requiring light and heat conditions to be supported inside the vacuum heat collection tube, resulting in high efficiency in the utilization of light and heat energy without damaging the glass tube substrate. This also ensures the sealing of the vacuum interlayer 3, making this invention more practical.

[0023] In this embodiment, the shape of the light-transmitting window 6 is rectangular, circular, or annular. The size and shape of the light-transmitting window 6 are selected according to the requirements of light intensity and range. The light-transmitting window 6 is located at the lower, middle, or upper part of the inner glass tube 2. That is, the light-transmitting window 6 can be set at any position of the selective absorption layer 5 to adapt to different types of reaction devices.

[0024] In this embodiment, the selective absorption layer 5 is preferably a selective light-transmitting film or a selective absorption coating. Such selective light-transmitting films or coatings are existing technology in the field of vacuum heat collection tubes, capable of efficiently converting absorbed solar energy into thermal energy to heat the heating medium 4. The light-transmitting window 6 is formed on the selective absorption layer 5. The selective absorption layer 5 can be peeled off using a laser ablation method. Using a 355nm ultraviolet laser to peel off the selective light-transmitting film or coating on the outer wall of the inner glass tube 2 to create the area of ​​the light-transmitting window 6 allows for a gradual transition between micro-transmitting, semi-transmitting, and fully transmitting regions. Light can be transmitted through the glass. Alternatively, a partial shielding method can be used to form the light-transmitting window 6. When the selective absorption layer 5 is made on the outer surface of the inner glass tube 2, the area where the light-transmitting window 6 needs to be opened is reserved in advance. This controls the process from the source, causing zero damage to the glass substrate, ensuring that the light-transmitting window 6 has no film residue, high light transmittance, and avoids subsequent removal processes. Alternatively, a chemical removal method can be used to form the light-transmitting window 6. An acid solution is applied to the area where the light-transmitting window 6 needs to be opened using a smearing tool. This causes the selective absorption layer 5 in that area to be corroded and peeled off by the acid solution. This method is low-cost and suitable for forming light-transmitting windows 6 with complex shapes.

[0025] Example 2: In this embodiment, a photothermal catalytic reaction device, such as... Figure 2 As shown, the device includes a reaction tube 7, an external light source 8, and a vacuum heat collection tube. Specifically, the reaction tube 7 is disposed in the inner glass tube 2 of the vacuum heat collection tube. The interior of the reaction tube 7 is used for chemical catalytic reaction. The reaction tube 7 is immersed in the heating medium 4, which is preferably air. The heating medium 4 has good light transmittance and low refractive index or reflectivity to ensure light intensity, high safety, no leakage risk, and can quickly respond to heating and uniformly cover and heat the reaction tube 7. One end of the reaction tube 7 is provided with a reaction area 9, which is aligned with the light transmission window 6. The external light source 8 is disposed on one side of the outer glass tube 1 of the vacuum heat collection tube. The external light source 8 shines directly on the reaction area 9 through the light transmission window 6. The external light source 8 can be an LED light source, a xenon lamp light source, or a mercury lamp light source, depending on the type of catalytic reaction.

[0026] With this structure, the external light source 8 shines directly into the reaction area 9 through the light-transmitting window 6, allowing a photothermal catalytic reaction requiring direct illumination to occur inside the glass inner tube 2. The external light source 8 and the light-transmitting window 6 provide photocatalysis to the reaction tube 7, while the photothermal conversion of the selective absorption layer 5 heats the reaction tube 7. This allows solar photothermal conversion heating and direct photocatalytic reaction to proceed synergistically, maximizing energy utilization and expanding the function of the vacuum heat collection tube. It can be widely used in composite application scenarios such as photo-thermal coupled catalysis and photochemical reactions.

[0027] In this embodiment, the reaction tube 7 is a transparent glass tube, ensuring that the light from the external light source 8 can completely enter the reaction tube 7 through the light-transmitting window 6. The reaction area 9 of the reaction tube 7 is filled with reaction solvent and photocatalyst, etc.

[0028] As an optimization, such as Figure 2 As shown, it also includes a plug 10, which is sealed and fixed to the inlet end of the vacuum heat collection tube. The plug 10 is used to seal the vacuum heat collection tube and to fix the reaction tube 7. The plug 10 can be a rubber stopper with a central hole. The end of the reaction tube 7 away from the reaction area 9 is sealed and connected to the plug 10. The plug 10 allows the reaction tube 7 to be suspended in the inner glass tube 2 and surrounded by the heating medium 4, so that it can be uniformly heated by the heating medium 4.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A vacuum heat collection tube with a window, characterized in that: It includes an outer glass tube (1) and an inner glass tube (2), with a vacuum interlayer (3) between the outer glass tube (1) and the inner glass tube (2), and the inner glass tube (2) is filled with a heating medium (4). A selective absorption layer (5) is provided on the outer surface of the inner glass tube (2), and a light-transmitting window (6) is provided on the selective absorption layer (5) to allow light to pass through.

2. A vacuum heat collection tube with a window according to claim 1, characterized in that: The shape of the light-transmitting window (6) is rectangular, circular, or annular.

3. A vacuum heat collection tube with a window according to claim 2, characterized in that: The light-transmitting window (6) is located at the lower, middle or upper part of the inner glass tube (2).

4. A vacuum heat collection tube with a window according to claim 1, characterized in that: The selective absorption layer (5) is a selective light-transmitting film or a selective absorption coating.

5. A vacuum heat collection tube with a window according to claim 1, characterized in that: The heating medium (4) is a low heat capacity medium.

6. A photothermal catalytic reaction device, characterized in that: The device includes a reaction tube (7), an external light source (8), and a vacuum heat collection tube as described in any one of claims 1-5. The reaction tube (7) is disposed in the inner glass tube (2) of the vacuum heat collection tube. One end of the reaction tube (7) is provided with a reaction area (9), which is aligned with the light-transmitting window (6). The external light source (8) is disposed on one side of the outer glass tube (1) of the vacuum heat collection tube, and the external light source (8) shines directly on the reaction area (9) through the light-transmitting window (6).

7. The photothermal catalytic reaction device according to claim 6, characterized in that: It also includes a plug (10), which is sealed and fixed at the inlet end of the vacuum heat collection tube, and the end of the reaction tube (7) away from the reaction area (9) is sealed and connected to the plug (10).

8. The photothermal catalytic reaction device according to claim 6, characterized in that: The external light source (8) is an LED light source, a xenon lamp light source, or a mercury lamp light source.

Images