A bundled tube type photocatalytic reaction device

Abstract

The application discloses a kind of cluster tube type photocatalytic reaction device, it is related to photo-reaction equipment technical field, including a positioning shell and multiple reaction unit tubes, the inside of the positioning shell is equipped with cluster flange, multiple the reaction unit tube is connected in the cluster flange, the bottom and top of the positioning shell are equipped with feed inlet and discharge outlet, the feed inlet and discharge outlet are communicated with material collecting tank by pipeline.The present application is reasonable in layout, compact in structure, integrated design, the combination of tubular light source and catalyst fixing piece is integrated into a single reaction unit tube, assembly operation is convenient and fast, light source is directly irradiated on catalyst, the reaction effect of catalyst is increased, and the reaction effect and speed are improved, which provides a reliable reaction device for large-scale continuous production.

Description

Technical Field

[0001] This invention relates to the field of photocatalytic reaction equipment technology, and in particular to a bundled tube type photocatalytic reaction device. Background Technology

[0002] Photocatalysis technology is widely used in fields such as exhaust gas purification, air pollutant removal, and CO2 reduction. In photocatalytic reactions, the reactor, as the core equipment, provides the light source and the site for the exchange of reaction media. Currently, pilot-scale reactors generally use indirect batch reactors or plate-type fixed-bed contact reactors, which suffer from problems such as high mass transfer resistance, low light penetration, and scale-up effects, resulting in low reaction efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a bundled tube type photocatalytic reaction device to solve the problems of low reaction efficiency caused by large mass transfer resistance and low light penetration in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] The present invention discloses a bundled tube type photocatalytic reaction device, comprising a positioning shell and multiple reaction unit tubes. A bundled flange is installed inside the positioning shell, and the multiple reaction unit tubes are connected through the bundled flange. The bottom and top of the positioning shell are provided with a feed inlet and a discharge outlet, which are connected to a collection box through pipes.

[0006] Preferably, the positioning housing includes a reactor housing and two end caps. The end caps are sealed to the upper and lower ends of the reactor housing by bolts or snap-fit ​​connections. The upper end cap has a discharge port, and the lower end cap has a feed port.

[0007] Preferably, there are two cluster flanges arranged in parallel. The center of each cluster flange has multiple positioning holes through which the reaction unit tube passes. The cluster flange has multiple mounting holes near its outer periphery. Connecting screws pass through the through holes on the end cap and are tightened onto the mounting holes, so that the end cap is connected to the cluster flange.

[0008] Preferably, the mounting holes are provided in two, three, or four shapes and are evenly distributed around the circumference.

[0009] Preferably, the reaction unit tube includes a detachably connected tubular light source and a catalyst fixing plate. The tubular light source has multiple slots opened along the axial direction inside. The two sides of the catalyst fixing plate are vertically embedded and connected to the slots. The bottom of the tubular light source is connected to a power source via wires.

[0010] Preferably, the catalyst fixing sheet is a long strip-shaped sheet with a single straight structure or a multi-sheet cross structure. When using a multi-sheet cross structure, the width of at least one fixing sheet corresponds to the width of a set of slots. The catalyst is distributed on the catalyst fixing sheet, and the catalyst is loaded by impregnation and ultrasonic dispersion.

[0011] Preferably, the catalyst fixing sheet is made of one or more of the following materials: stainless steel, glass, quartz, PTFE, polyethylene, polypropylene, acrylic, aluminum alloy, aluminum oxide, and silicon dioxide.

[0012] Preferably, the light intensity of the tubular light source is adjustable, with a light intensity of 1 mW / cm². 2 ~500mW / cm 2 The wavelength is the full-band spectrum.

[0013] Preferably, the inner diameter of the tubular light source is set to 0.1mm to 1000mm, and the height-to-diameter ratio is 1:1 to 500:1.

[0014] Preferably, the reactor shell adopts a double-layer cylindrical structure, the inner cavity of the double-layer cylindrical shell is filled with heat-insulating liquid, and the outer wall of the double-layer cylindrical shell is connected to an inlet pipe and an outlet pipe, which are connected to an external heat-insulating heating device through pipelines.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0016] This invention discloses a bundled tube photocatalytic reactor, comprising a positioning shell and multiple reaction unit tubes. The positioning shell includes a reactor shell and end caps at both ends. Each reaction unit tube includes a detachably connected tubular light source and a catalyst fixing plate. In use, firstly, nano-MOF material is uniformly dispersed on the catalyst fixing plate in an ultrasonic bath, dried, and then inserted into the tubular light source to form a reaction unit tube. Next, multiple reaction unit tubes are inserted into the bundled flanges and placed into the reactor shell. Then, the power supply to the tubular light source is connected. The reactor shell is then connected to the upper and lower bundled flanges and their caps using bolts or clips, with sealing rings at the connections to ensure the airtightness of the photocatalytic reactor. Finally, the feed inlet on the lower flange cap is connected to a feed pipe, and the discharge outlet on the upper flange cap is connected to a discharge pipe, allowing the substance to be treated to undergo a catalytic reaction. When the catalyst is deactivated or the reaction is complete, the flange caps are removed, the catalyst fixing plate is removed, and then the catalyst is cleaned, regenerated, and dispersed before being reinstalled in the reaction unit tubes for the next round of reaction.

[0017] This invention features a reasonable layout, compact structure, and integrated design. It combines a tubular light source and a catalyst fixing plate into a single reaction unit tube, making assembly convenient and quick. The light source directly illuminates the catalyst, amplifying the catalyst reaction effect and improving the reaction efficiency and speed, thus providing a reliable reaction device for large-scale continuous production. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the bundled tube photocatalytic reaction device of the present invention;

[0020] Figure 2 This is an exploded view of the bundled tube photocatalytic reaction device of the present invention;

[0021] Figure 3 This is a schematic diagram of the reaction unit tube structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the reaction unit tube of the present invention.

[0023] Explanation of reference numerals in the attached diagram: 1. Tubular light source; 2. Catalyst fixing plate; 3. Bundled flange; 4. End cap; 5. Reactor shell; 6. Reaction unit tube; 7. Inlet; 8. Outlet;

[0024] 101, slot; 201, catalyst; 301, positioning hole; 302, mounting hole; 501, liquid inlet pipe; 502, liquid outlet pipe;

[0025] 601. Temperature sensor; 602. Wire outlet. Detailed Implementation

[0026] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be 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] like Figure 1-4 As shown, a bundled tube type photocatalytic reaction device includes a positioning shell and multiple reaction unit tubes 6. A bundled flange 3 is installed inside the positioning shell, and the multiple reaction unit tubes 6 are connected through the bundled flange 3. The bottom and top of the positioning shell are provided with a feed inlet 7 and a discharge outlet 8, and the feed inlet 7 and the discharge outlet 8 are connected to a collection box through pipes.

[0028] Specifically, the positioning housing includes a reactor housing 5 and two end caps 4. The end caps 4 are sealed to the upper and lower ends of the reactor housing 5 by bolts or snap-fit. The upper end cap 4 has a discharge port 8 and the lower end cap 4 has a feed port 7.

[0029] Two parallel cluster flanges 3 are provided. Multiple positioning holes 301 are formed in the center of each cluster flange 3, through which the reaction unit tube 6 passes. Multiple mounting holes 302 are provided near the outer periphery of each cluster flange 3. Connecting screws pass through the through holes on the end cap 4 and are tightened onto the mounting holes 302, thus connecting the end cap 4 to the cluster flange 3. Specifically, a sealing ring is provided between the tubular light source 1 and the positioning holes 301 on the cluster flange, ensuring a tight and reliable connection of the tubular light source 1 to the cluster flange.

[0030] Specifically, the mounting holes 302 are set to two, three or four and are evenly distributed around the circumference. The specific number can be set according to actual needs. For example, when the size of the positioning housing is large, more holes are selected, and when the size is small, fewer holes are selected.

[0031] like Figure 3 , 4 As shown, the reaction unit tube 6 includes a detachably connected tubular light source 1 and a catalyst fixing plate 2. The tubular light source 1 has multiple slots 101 opened along the axial direction inside. The two sides of the catalyst fixing plate 2 are vertically embedded and connected to the slots. The bottom of the tubular light source 1 is connected to the power supply through wires.

[0032] Specifically, the catalyst fixing plate 2 is a long strip-shaped plate, with a single straight-line structure or a multi-plate cross structure. When using a multi-plate cross structure, the width of at least one fixing plate corresponds to the width of a set of slots 101. Catalyst 201 is distributed on the catalyst fixing plate 2, and the catalyst 201 is loaded by impregnation and ultrasonic dispersion. Specifically, the multi-plate cross structure includes cross-shaped, X-shaped, Y-shaped, star-shaped, etc.

[0033] Specifically, the catalyst fixing sheet 2 is made of one or more of the following materials: stainless steel, glass, quartz, PTFE, polyethylene, polypropylene, acrylic, aluminum alloy, aluminum oxide, and silicon dioxide.

[0034] The light intensity of the tubular light source 1 is adjustable; the light intensity is set to 1 mW / cm². 2 ~500mW / cm 2The wavelength is a full-band spectrum. The inner diameter of the tube light source 1 is set to 0.1mm to 1000mm, and the height-to-diameter ratio is 1:1 to 500:1. Specifically, the adjustment of the light source intensity and the adjustment of the band can facilitate the switching of different reaction schemes, and the larger height-to-diameter ratio can effectively reduce the amplification effect.

[0035] Specifically, the reactor shell 5 adopts a double-layer cylindrical structure. The inner cavity of the double-layer cylindrical shell is filled with heat-insulating liquid. An inlet pipe 501 and an outlet pipe 502 are connected to the outer wall of the double-layer cylindrical shell. The inlet pipe 501 and the outlet pipe 502 are connected to an external heat-insulating heating device through pipelines. Specifically, the heat-insulating liquid flows in from the lower inlet pipe 501 under the drive of a power pump, spreads upward, and flows out from the upper outlet pipe 502. The flow of the heat-insulating liquid facilitates the regulation of the internal temperature of the entire device. Specifically, a temperature sensor 601 is installed inside the cavity of the reactor shell 5 to monitor the temperature of the internal heat-insulating liquid, thereby enabling the photocatalytic reaction to be carried out at a constant temperature. This facilitates the evaluation of different reaction processes and the usage status of the catalyst, such as CO2 reduction to CO and photocatalytic water splitting to hydrogen.

[0036] The process of using this invention is as follows:

[0037] In one specific embodiment, the bundled tube photocatalytic reaction device has a tube light source 1, which is embedded in the tube. The inner wall of the tube is made of high-transmittance glass and has a cross-shaped groove on the inner side wall. The catalyst fixing plate 2 is made of stainless steel sheet welded into a cross shape. Its diameter is slightly smaller than that of the tube light source 1 to facilitate the installation of the catalyst fixing plate 2. Its length is the same as that of the tube light source 1.

[0038] First, the nano-MOF material is uniformly dispersed on the catalyst fixing plate 201 in an ultrasonic bath. After drying, it is installed inside the tubular light source 1, forming a structure as shown in the image. Figure 3 , 4 The reaction unit tube 6 in the middle has an inner diameter of 5mm and a height-to-diameter ratio of 50:1.

[0039] After inserting multiple reaction unit tubes 6 into the positioning holes 301 of the bundled flange 3, they are then assembled into the reactor shell 5. The power supply of the tubular light source 1 is connected, and the power supply of the tubular light source is externally connected through the wire outlet 602 on the flange cover. The reactor shell 5 is connected to the upper and lower bundled flanges 3 and the upper and lower flange covers 4 by bolts or clips. A sealing ring for fastening is provided between the reactor shell 5 and the upper and lower bundled flanges 3, and a sealing ring is also provided between the ends of the upper and lower bundled flanges 3 and the upper and lower flange covers 4 to ensure the airtightness of the photocatalytic reactor.

[0040] After assembly, connect the inlet 7 on the lower flange cover to the feed pipe, and connect the outlet 8 at the upper end to the outlet pipe. Finally, introduce a mixture of gas, liquid, or aerosol to carry out the catalytic reaction.

[0041] When the catalyst is deactivated or the reaction is completed, the catalyst fixing plate 2 in the reaction unit tube 6 is removed by disassembling the flange cover 4. After cleaning, catalyst regeneration and dispersion are performed, and then the catalyst is put back into the reaction unit tube for the next round of reaction.

[0042] The above-mentioned scale-up experiment using multiple reaction unit tubes can effectively eliminate the scale-up problem of photocatalytic reaction, providing a reliable reaction device for large-scale continuous production. Specifically, it can be applied to photocatalytic CO2 reduction reaction or water photolysis hydrogen production reaction.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A bundled tube type photocatalytic reaction device, characterized in that: It includes a positioning shell and multiple reaction unit tubes (6). A cluster flange (3) is installed inside the positioning shell. The multiple reaction unit tubes (6) are connected through the cluster flange (3). The bottom and top of the positioning shell are provided with a feed inlet (7) and a discharge outlet (8). The feed inlet (7) and the discharge outlet (8) are connected to the collection box through pipes. The reaction unit tube (6) includes a detachably connected tubular light source (1) and a catalyst fixing plate (2). The tubular light source (1) has multiple slots (101) opened along the axial direction inside. The two sides of the catalyst fixing plate (2) are vertically embedded and connected to the slots. The bottom of the tubular light source (1) is connected to the power supply through wires. The catalyst (201) is distributed on the catalyst fixing sheet (2), and the catalyst (201) is loaded by impregnation and ultrasonic dispersion.

2. The bundled tube photocatalytic reaction device according to claim 1, characterized in that: The positioning housing includes a reactor housing (5) and two end caps (4). The end caps (4) are connected to the upper and lower ends of the reactor housing (5) by bolts or snap-fit. The upper end cap (4) has a discharge port (8) and the lower end cap (4) has a feed port (7).

3. The bundled tube photocatalytic reaction device according to claim 2, characterized in that: Two cluster flanges (3) are provided and arranged in parallel. Multiple positioning holes (301) are opened in the center of the cluster flange (3). The reaction unit tube (6) passes through the positioning holes (301). Multiple mounting holes (302) are provided near the outer periphery of the cluster flange (3). After the connecting screw passes through the through hole on the end cover (4), it is tightened and connected to the mounting hole (302), so that the end cover (4) and the cluster flange (3) are connected together.

4. The bundled tube photocatalytic reaction device according to claim 3, characterized in that: The mounting holes (302) are configured to be two, three or four and are evenly distributed around the circumference.

5. The bundled tube photocatalytic reaction device according to claim 1, characterized in that: The catalyst fixing plate (2) is a long strip-shaped plate, with a single straight structure or a multi-plate cross structure. When the multi-plate cross structure is used, the width of at least one fixing plate corresponds to the width of a set of slots (101).

6. The bundled tube photocatalytic reaction device according to claim 5, characterized in that: The catalyst fixing sheet (2) is made of one or more of the following materials: stainless steel, glass, quartz, PTFE, polyethylene, polypropylene, acrylic, aluminum alloy, aluminum oxide, and silicon dioxide.

7. The bundled tube photocatalytic reaction device according to claim 1, characterized in that: The light intensity of the tubular light source (1) is adjustable, with a light intensity of 1 mW / cm². 2 ~500mW / cm 2 The wavelength is the full-band spectrum.

8. The bundled tube photocatalytic reaction device according to claim 1, characterized in that: The inner diameter of the tubular light source (1) is set to 0.1mm to 1000mm, and the height-to-diameter ratio is 1:1 to 500:

1.

9. The bundled tube photocatalytic reaction device according to claim 2, characterized in that: The reactor shell (5) adopts a double-layer cylindrical structure. The inner cavity of the double-layer cylindrical shell is filled with heat-insulating liquid. The outer wall of the double-layer cylindrical shell is connected to an inlet pipe (501) and an outlet pipe (502). The inlet pipe (501) and the outlet pipe (502) are connected to an external heat-insulating heating device through pipes.

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