Photocatalytic reactor

Abstract

The invention provides a photocatalytic reactor which comprises a first cylinder and a second cylinder, the second cylinder is arranged in the first cylinder, the first cylinder and the second cylinder are arranged at an interval to form an annular reaction channel, and a first cooling channel is arranged in the second cylinder; and the photocatalytic light source is arranged around the first barrel, and a second cooling channel is arranged between the photocatalytic light source and the first barrel. According to the photocatalytic reactor provided by the invention, light emitted by the photocatalytic light source can penetrate through the first barrel to irradiate into the annular reaction channel, so that photocatalytic reaction is more sufficient, the reaction efficiency is improved, and continuous production and large-scale production of products can be realized. Meanwhile, both the first cooling channel and the second cooling channel can cool the annular reaction channel, the cooling effect is good, the device is suitable for reactions with high reaction heat release and low reaction temperature, and the reaction efficiency is further improved. And secondly, the second cooling channel cools the photocatalytic light source while cooling the annular reaction channel.

Description

Technical Field

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

[0002] Photocatalysis technology is a hot frontier research field in organic synthesis in recent years and is considered an effective way to solve the energy and environmental crisis. Photocatalysis effectively optimizes reaction conditions, improves energy efficiency, and can achieve efficient redox, coupling, cycloaddition and other reactions under mild conditions. In addition, photocatalysis technology can achieve some reactions that are difficult to achieve with traditional methods, effectively control the degree of reaction, reduce the occurrence of side reactions, and improve the safety and reliability of the reaction.

[0003] In the process of research and application of photocatalysis, photocatalytic reactor is an essential reaction device. When facing reactions with strict temperature control requirements, current photocatalytic reaction devices are difficult to control the reaction temperature, resulting in low production efficiency and poor product quality. Summary of the invention

[0004] In view of this, the purpose of the present application is to propose a photocatalytic reactor, which has the advantages of sufficient reaction, good cooling effect and improved reaction efficiency.

[0005] Based on the above objectives, the present application provides a photocatalytic reactor, comprising:

[0006] a first cylinder and a second cylinder, wherein the second cylinder is disposed in the first cylinder, the first cylinder and the second cylinder are spaced apart to form an annular reaction channel, and a first cooling channel is disposed in the second cylinder;

[0007] A photocatalytic light source is arranged around the first cylinder, and a second cooling channel is arranged between the photocatalytic light source and the first cylinder;

[0008] Wherein, the first cylinder is a light-transmitting cylinder, and the light emitted by the photocatalytic light source can be irradiated into the annular reaction channel through the first cylinder.

[0009] In a preferred embodiment, the photocatalytic reactor also includes a bottom plate and a sealing clamping assembly, the bottom plate is sleeved on the first cylinder, and the sealing clamping assembly is at least partially disposed between the bottom plate and the first cylinder to seal the bottom plate and the first cylinder.

[0010] In a preferred embodiment, the sealing clamping assembly includes a first fastener, a first sealing member and a first pressing member. A first groove is annularly arranged on the base plate, and the first sealing member is partially arranged in the first groove and abuts against the outer wall of the first cylinder; the first fastener passes through the first pressing member and the base plate, and is used to drive the first pressing member to squeeze the first seal; the first pressing member abuts against the first seal, and is used to squeeze the first seal driven by the first fastener until the first seal is pressed against the outer wall of the first cylinder.

[0011] In a preferred embodiment, the photocatalytic reactor also includes a connecting seat, the connecting seat is provided with a cooling medium inlet and a first opening opened toward the second cooling channel, the orthographic projection of the cooling medium inlet on the target plane and the orthographic projection of the second cooling channel on the target plane do not overlap, and the cooling medium inlet is connected to the second cooling channel through the first opening; wherein, the target plane is any plane perpendicular to the axial direction of the first cylinder.

[0012] In a preferred embodiment, the connection seat is disposed on the top and / or bottom of the photocatalytic light source;

[0013] And / or, the connection seat includes a baffle, which is used to change the flow direction of the cooling medium in the connection seat to guide the cooling medium entering the connection seat from the cooling medium inlet to the first opening;

[0014] And / or, the connection seat is provided with a plurality of first openings in the circumferential direction and connected with the second cooling channel.

[0015] In a preferred embodiment, the photocatalytic light source is detachably connected to the connecting seat;

[0016] The photocatalytic reactor includes a plurality of connection seats of different models.

[0017] In a preferred embodiment, a fourth cooling channel is disposed at the back of the photocatalytic light source, and the fourth cooling channel has a fourth cooling inlet and a fourth cooling outlet.

[0018] In a preferred embodiment, the photocatalytic reactor further comprises a third pipe, the cooling pipe of the fourth cooling channel penetrates the third pipe, and a second sealing member is provided between the third pipe and the cooling water pipe of the fourth cooling channel;

[0019] And / or, the photocatalytic reactor further comprises a fourth pipe, a power line of the photocatalytic light source passes through the fourth pipe, and a third sealing member is arranged between the fourth pipe and the power line of the photocatalytic light source.

[0020] In a preferred embodiment, the photocatalytic reactor also includes a third cylinder and a first pipe, the third cylinder is arranged in the second cylinder, the third cylinder and the second cylinder are spaced apart to form a first gap, the first pipe penetrates the third cylinder from top to bottom, the first gap is connected to the first pipe to constitute part of the first cooling channel, and the first cooling channel has a first cooling inlet and a first cooling outlet.

[0021] In a preferred embodiment, the photocatalytic reactor also includes a second pipe, which is sleeved in the first pipe to form a third gap therebetween, the third gap is connected to the first gap, the first coolant inlet is arranged in the first pipe, and the first cooling outlet is arranged in the second pipe.

[0022] In a preferred embodiment, the photocatalytic reactor also includes an end cover, the third cylinder includes a cylinder body and a second connecting piece, the second connecting piece is connected between the end cover and the cylinder body, the second connecting piece is arranged around the first pipe, and the second connecting piece is circumferentially provided with a plurality of second openings for connecting the first gap and the third gap.

[0023] In a preferred embodiment, the photocatalytic reactor also includes a cooling jacket, which is arranged around the photocatalytic light source, and a third cooling channel is formed in the cooling jacket. The cooling jacket is provided with a third coolant inlet and a third coolant outlet connected to the third cooling channel.

[0024] In a preferred embodiment, the photocatalytic reactor includes an end cover and multiple models of the first cylinder, the first cylinder and the end cover are detachably connected, and the gaps between the first cylinders and the second cylinders of different models are different to form annular reaction channels of different sizes.

[0025] In a preferred embodiment, the photocatalytic reactor further comprises an end cover and a fastening assembly, wherein the fastening assembly connects the end cover and the first cylinder, and the fastening assembly comprises a second fastener and a plurality of stacked gaskets.

[0026] In a preferred embodiment, the annular reaction channel has a reaction inlet and a reaction outlet, and the photocatalytic reactor also includes an inlet guide member and / or an outlet guide member. The inlet guide member is arranged close to the reaction inlet for diverting the medium entering from the reaction inlet into the annular reaction channel; the outlet guide member is arranged close to the reaction outlet for diverting the catalytic product flowing out of the annular reaction channel to the reaction outlet.

[0027] From the above description, it can be seen that the photocatalytic reactor provided in the present application is achieved by disposing the second cylinder in the first cylinder, the first cylinder and the second cylinder are spaced apart to form an annular reaction channel, the photocatalytic light source is disposed around the first cylinder, the first cylinder is a light-transmitting cylinder, and the light emitted by the photocatalytic light source can be transmitted through the first cylinder to irradiate into the annular reaction channel, so that the photocatalytic reaction is more complete, the reaction efficiency is improved, and continuous production and large-scale production of products can be realized.

[0028] At the same time, a first cooling channel is provided in the second cylinder, and a second cooling channel is provided between the photocatalytic light source and the first cylinder, wherein both the first cooling channel and the second cooling channel can cool the annular reaction channel, and the cooling effect is good, which is suitable for reactions with high exothermic reaction and low reaction temperature, and further improves the reaction efficiency. Secondly, while cooling the annular reaction channel, the second cooling channel also cools the photocatalytic light source, further reducing the temperature in the reactor and improving the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic diagram of the internal structure of a photocatalytic reactor in one embodiment of the present application;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure enlargement at the center A;

[0032] Figure 3 for Figure 1 A schematic diagram of the structure enlarged at B in the middle;

[0033] Figure 4 for Figure 1 A schematic diagram of the structure enlarged at C in the middle;

[0034] Figure 5 This is a schematic diagram of the structure of a connecting socket in an embodiment of the present application;

[0035] Figure 6 This is a schematic diagram of the structure of a photocatalytic light source in one embodiment of the present application;

[0036] Figure 7 It is a schematic diagram of the partial structure of a photocatalytic reactor in one embodiment of the present application.

[0037] Reference numerals

[0038] 100, photocatalytic reactor; 110, annular reaction channel; 111, reaction inlet; 112, reaction outlet; 120, second cooling channel; 130, third pipeline; 140, fourth pipeline; 150, second connecting member; 151, second opening; 160, fastening assembly; 161, second fastening member; 162, first gasket; 163, second gasket; 164, third gasket; 170, inlet guide member; 180, outlet guide member;

[0039] 1. The first cylinder;

[0040] 2. Second cylinder; 21. First cooling channel;

[0041] 3. Sealing clamping assembly; 31. First fastener; 32. First sealing member; 33. First pressing member; 331. First part; 332. Second part;

[0042] 4. Photocatalytic light source; 41. Fourth cooling channel; 42. Surface light source;

[0043] 5. Connecting seat; 51. Cooling medium inlet; 52. First opening; 53. Baffle; 54. Cooling medium outlet;

[0044] 6. Bottom plate; 61. First card slot;

[0045] 7. End cap;

[0046] 8. Cooling jacket; 81. Third cooling channel; 82. Third cooling inlet; 83. Third cooling outlet;

[0047] 91. The third cylinder; 92. The first pipe; 93. The first gap; 94. The second pipe; 95. The cylinder body; 96. The third gap; 97. The first cooling inlet; 98. The first cooling outlet. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0049] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] Reference Figure 1-3 As shown, an embodiment of the present application discloses a photocatalytic reactor 100, which includes a first cylinder 1, a second cylinder 2 and a photocatalytic light source 4. The second cylinder 2 is arranged in the first cylinder 1, and the first cylinder 1 and the second cylinder 2 are spaced apart to form an annular reaction channel 110. A first cooling channel 21 is arranged in the second cylinder 2, the photocatalytic light source 4 is arranged around the first cylinder 1, and a second cooling channel 120 is arranged between the photocatalytic light source 4 and the first cylinder 1.

[0051] The first cylinder 1 is a light-transmitting cylinder, and the light emitted by the photocatalytic light source 4 can penetrate the first cylinder 1 and irradiate into the annular reaction channel 110 .

[0052] Optionally, the first barrel 1 is made of quartz glass, which has excellent transmittance in the continuous wavelength range from ultraviolet to infrared radiation, can transmit far ultraviolet light, visible light and near infrared spectrum, has high light transmittance and good optical uniformity. At the same time, quartz glass is an acidic material, and is inert to any other acid except hydrofluoric acid and hot phosphoric acid, and is the best acid-resistant material. The corrosion degree of alkali and salt to quartz glass is also very small at room temperature, and quartz glass has good chemical stability. In other embodiments, the first barrel 1 can be a transparent material such as high borosilicate glass.

[0053] Optionally, the photocatalytic light source 4 is an ultraviolet light source, a visible light source, an infrared light source, etc., which can be selected according to the required photocatalytic reaction, and is not specifically limited.

[0054] The photocatalytic reactor 100 provided in this embodiment is configured such that the second cylinder 2 is disposed in the first cylinder 1, and the first cylinder 1 and the second cylinder 2 are spaced apart to form an annular reaction channel 110. The photocatalytic light source 4 is disposed around the first cylinder 1, and the first cylinder 1 is a light-transmitting cylinder. The light emitted by the photocatalytic light source 4 can pass through the first cylinder 1 and irradiate into the annular reaction channel 110, thereby making the photocatalytic reaction more complete, improving the reaction efficiency, and realizing continuous production and large-scale production of products.

[0055] At the same time, a first cooling channel 21 is provided in the second cylinder 2, and a second cooling channel 120 is provided between the photocatalytic light source 4 and the first cylinder 1, wherein both the first cooling channel 21 and the second cooling channel 120 can cool the annular reaction channel 110, and the cooling effect is good, which is suitable for reactions with high exothermic reaction and low reaction temperature, and further improves the reaction efficiency. Secondly, while cooling the annular reaction channel 110, the second cooling channel 120 also cools the photocatalytic light source 4, further reducing the temperature in the reactor and improving the reaction efficiency.

[0056] An annular reaction channel 110 is formed between the inner wall of the first cylinder 1 and the outer wall of the second cylinder 2, so as to facilitate setting the first cooling channel 21 in the second cylinder 2, thereby improving the cooling effect.

[0057] Among them, the reaction temperature refers to the temperature environment in which the chemical reaction is carried out. Some reactions need to be carried out in a relatively low temperature environment. However, when the reaction occurs, more heat will be released, resulting in an increase in the ambient temperature, thereby inhibiting the continued progress of the reaction. Therefore, in order to ensure that the reaction is carried out continuously and efficiently, it is necessary to provide a relatively low temperature environment for the reaction. The photocatalytic reactor provided in this embodiment can quickly take away the heat generated by the reaction and the heat generated by the photocatalytic light source 4 by setting up multiple cooling channels, thereby providing a continuous low temperature environment for the reaction and ensuring that the reaction is carried out continuously and efficiently.

[0058] In one embodiment, the photocatalytic reactor 100 further includes a bottom plate 6 and a sealing clamping assembly 3, the bottom plate 6 is sleeved on the first cylinder 1, and the sealing clamping assembly 3 is at least partially disposed between the bottom plate 6 and the first cylinder 1 to seal the bottom plate 6 and the first cylinder 1. The bottom plate 6 and the sealing clamping assembly 3 cooperate to clamp and fix the first cylinder 1. At the same time, the sealing clamping assembly 3 seals the bottom plate 6 and the first cylinder 1 to prevent leakage of the cooling medium in the second cooling channel 120.

[0059] Reference Figure 4As shown, in one of the embodiments, the sealing clamping assembly 3 includes a first fastener 31, a first sealing member 32 and a first pressing member 33. A first groove 61 is annularly provided on the base plate 6. Part of the first sealing member 32 is provided in the first groove 61 and abuts against the outer wall of the first cylinder 1. The first fastener 31 passes through the first pressing member 33 and the base plate 6, and is used to drive the first pressing member 33 to squeeze the first sealing member 32. The first pressing member 33 abuts against the first sealing member 32, and is used to squeeze the first sealing member 32 driven by the first fastener 31 until the first sealing member 32 is tightly abutted against the outer wall of the first cylinder 1, so as to ensure the clamping, fixing and sealing of the first cylinder 1 by adjusting the squeezing degree of the first pressing member 33 on the first sealing member 32, and at the same time, avoid damage to the first cylinder 1 caused by excessive squeezing.

[0060] Optionally, the first fastener 31 is a bolt or a screw, etc., the first seal 32 is a sealing filler, the annular steel material includes a first portion 331 and a second portion 332 connected, the first fastener 31 passes through the first portion 331 and is connected to the bottom plate 6, the second portion 332 abuts against the first seal 32, and in the process of tightening the first fastener 31, the first portion 331 gradually approaches the bottom plate 6, and the second portion 332 squeezes the sealing filler at the same time, and the sealing filler seals the bottom plate 6 and the first cylinder 1. Further, the first pressing member 33 is an annular steel material, and the cross section of the annular steel material parallel to the axial direction of the first cylinder 1 is L-shaped.

[0061] Reference Figure 1 and Figure 5 As shown, in one embodiment, the photocatalytic reactor 100 also includes a connecting seat 5, the connecting seat 5 is provided with a cooling medium inlet 51 and a first opening 52 opened toward the second cooling channel 120, the orthographic projection of the cooling medium inlet 51 on the target plane does not overlap with the orthographic projection of the second cooling channel 120 on the target plane, and the cooling medium inlet 51 is connected to the second cooling channel 120 through the first opening 52; wherein, the target plane is any plane perpendicular to the axial direction of the first cylinder 1 (such as the Y direction in the figure).

[0062] Specifically, since the second cooling channel 120 is an annular channel and its thickness is relatively small, if the cooling medium inlet 51 is set directly above or directly below the second cooling channel 120, it is difficult to provide a sufficient flow of cooling medium for the second cooling channel 120. Therefore, in this embodiment, the cooling medium inlet 51 is staggered with the second cooling channel 120, and the cooling medium is injected into the second cooling channel 120 from the radial direction of the second cooling channel 120, which can provide a sufficient flow of cooling medium, thereby improving the cooling effect. At the same time, staggering the cooling medium inlet 51 with the second cooling channel 120 can also improve the compactness of the structure, while ensuring the cooling effect, reducing the volume of the photocatalytic reactor 100 as much as possible.

[0063] In one embodiment, the connection seat 5 is disposed at the top of the photocatalytic light source 4. In another embodiment, the connection seat 5 is disposed at the bottom of the photocatalytic light source 4. In another embodiment, the connection seat 5 is disposed at the top and bottom of the photocatalytic light source 4 to support the photocatalytic light source 4, wherein one of the connection seats 5 is provided with a cooling medium inlet 51, and the other is provided with a cooling medium outlet 54. Preferably, the connection seat 5 disposed at the top of the photocatalytic light source 4 is provided with a cooling medium outlet 54, and the connection seat 5 disposed at the bottom of the photocatalytic light source 4 is provided with a cooling medium inlet 51.

[0064] In one embodiment, the connection base 5 includes a baffle 53, which is used to change the flow direction of the cooling medium in the connection base 5 so as to guide the cooling medium entering the connection base 5 from the cooling medium inlet 51 to the first opening 52. Figure 1 As shown, the cooling medium first enters the connection seat 5 from the cooling medium inlet 51 from bottom to top, and then moves toward the first opening 52 under the action of the baffle 53 and enters the second cooling channel 120 through the first opening 52 .

[0065] In one embodiment, the connection seat 5 is provided with a plurality of first openings 52 in communication with the second cooling channel 120 along the circumferential direction, so as to facilitate the cooling medium to enter the second cooling channel 120 from the circumferential direction of the second cooling channel 120, and enable the cooling medium to flow more evenly on the outer surface of the first cylinder 1 to increase the cooling effect. Preferably, the cooling medium in the second cooling channel 120 is gas, and in another embodiment, the cooling medium in the second cooling channel 120 is liquid.

[0066] When the cooling medium in the second cooling channel 120 is gas, the second cooling channel 120 is an air-cooling channel to avoid water cooling to absorb and reflect the light emitted by the photocatalytic light source 4. Specifically, when water cooling is used, the coolant will absorb and reflect the light emitted by the photocatalytic light source 4, causing the light to become weak when irradiated into the annular reaction channel 110, thereby affecting the efficiency of the photocatalytic reaction. In this embodiment, air cooling is used between the photocatalytic light source 4 and the annular reaction channel 110 to avoid absorption and reflection of light and ensure the efficiency of the photocatalytic reaction.

[0067] In one embodiment, the photocatalytic light source 4 is detachably connected to the connecting seat 5, and the photocatalytic reactor 100 includes a plurality of connecting seats 5 of different models. Different connecting seats 5 can be replaced according to different needs. At the same time, different photocatalytic light sources 4 can also be replaced according to needs.

[0068] Reference Figure 6As shown, in one embodiment, a fourth cooling channel 41 is provided at the back of the photocatalytic light source 4, and the fourth cooling channel 41 has a fourth cooling inlet and a fourth cooling outlet, and a coolant can be continuously provided to the fourth cooling channel 41 to ensure the cooling effect of the photocatalytic light source 4. Furthermore, the fourth coolant inlet and the fourth coolant outlet are connected to a cooling circulation pump.

[0069] Please continue to refer to Figure 6 As shown, in one embodiment, the photocatalytic light source 4 includes a plurality of surface light sources 42, which are sequentially connected around the first cylinder 1 to form a ring, and can provide uniform light for the annular reaction channel 110 to ensure the adequacy of the photocatalytic reaction.

[0070] Furthermore, each surface light source 42 is provided with a fourth cooling channel 41 to cool each fourth cooling channel 41 .

[0071] Please continue to refer to Figure 1 As shown, in one embodiment, the photocatalytic reactor 100 further includes a third pipe 130, the cooling pipe of the fourth cooling channel 41 runs through the third pipe 130, and a second sealing member is provided between the third pipe 130 and the cooling water pipe of the fourth cooling channel 41 to prevent cooling water leakage. Optionally, the second sealing member is a sealing plug, a sealing ring, etc.

[0072] Please continue to refer to Figure 1 As shown, in one embodiment, the photocatalytic reactor 100 further includes a fourth pipe 140, and the power line of the photocatalytic light source 4 runs through the fourth pipe 140. A third sealing member is provided between the fourth pipe 140 and the power line of the photocatalytic light source 4 to fix the power line and achieve waterproofing and other effects. Optionally, the third sealing member is a sealing plug, a sealing ring, etc.

[0073] Please continue to refer to Figure 1 and 2 As shown, the first cooling channel 21 is an annular channel in the axial direction of the photocatalytic reactor 100, that is, the first cooling inlet 97 and the first cooling outlet 98 of the first cooling channel 21 are on the same side of the photocatalytic reactor 100, wherein the annular channel can be U-shaped, serpentine, or meander-shaped, etc.

[0074] Specifically, in one embodiment, the photocatalytic reactor 100 includes a third cylinder 91 and a first pipe 92. The third cylinder 91 is disposed in the second cylinder 2. The third cylinder 91 and the second cylinder 2 are spaced apart to form a first gap 93. The first pipe 92 penetrates the end cover 7 and the third cylinder 91 from top to bottom. The first gap 93 is connected to the first pipe 92 to constitute a part of the first cooling channel 21.

[0075] Among them, the first pipe 92 guides the coolant into the bottom of the second cylinder 2, and the coolant flows upward from the bottom of the second cylinder 2 to the first cooling outlet 98 at the top, which increases the residence time of the cooling medium in the first gap 93, so that the cooling medium contacts the inner wall of the second cylinder 2 more fully.

[0076] Preferably, the cooling medium in the first cooling channel 21 is liquid, and the cooling medium flows out from the first cooling outlet 98 in an overflow manner, so that the inner wall of the second cylinder 2 is in contact with the coolant, and the contact area is large, so that the second cylinder 2 can be quickly and continuously cooled. Furthermore, the first cooling inlet 97 and the first cooling outlet 98 are connected to a cooling circulation pump. In another embodiment, the cooling medium in the first cooling channel 21 is gas.

[0077] Please continue to refer to Figure 1 and 2 As shown, in one embodiment, the photocatalytic reactor 100 further includes a second pipe 94, the second pipe 94 is sleeved on the first pipe 92 and a third gap 96 is formed therebetween, the third gap 96 is connected to the first gap 93, a first cooling inlet 97 is arranged on the first pipe 92, and a first cooling outlet 98 is arranged on the second pipe 94. The first cooling inlet 97 and the first cooling outlet 98 are arranged at the top to avoid interference with other cooling inlets and outlets, and at the same time, the first cooling inlet 97 and the first cooling outlet 98 are arranged larger to increase the flow rate of the cooling medium in the first cooling channel 21, thereby improving the cooling effect.

[0078] Please continue to refer to Figure 2 and 7 As shown, in one embodiment, the photocatalytic reactor 100 further includes an end cover 7, the third cylinder 91 includes a cylinder body 95 and a second connecting member 150, the second connecting member 150 is connected between the end cover 7 and the cylinder body 95, the second connecting member 150 is arranged around the first pipe 92, and the second connecting member 150 is circumferentially provided with a plurality of second openings 151 for connecting the first gap 93 and the third gap 96. Among them, the second connecting member 150 plays the role of connecting the third cylinder 91 with the end cover 7 to fix the third cylinder 91, and at the same time, the second connecting member 150 is circumferentially provided with the second opening 151, so that the cooling medium in the first gap 93 flows into the third gap 96 through the second opening 151, and then flows out from the first cooling outlet 98 through the third gap 96. Among them, the second opening 151 preferably runs through the edge of the second connecting member 150, and in this embodiment, the second opening 151 is semicircular, and in other embodiments, the second opening 151 can be other shapes.

[0079] Optionally, the second connecting member 150 is a metal ring, the third cylinder 91 and the end cover 7 are made of metal, and the upper surface and lower surface of the metal ring are welded to the end cover 7 and the third cylinder 91 respectively to ensure the sealing between the third cylinder 91 and the end cover 7 to prevent the cooling medium in the first cooling channel 21 from leaking into the annular reaction channel 110.

[0080] In another embodiment, the third cylinder 91 may not include the second connecting piece 150 , and the first gap 93 and the third gap 96 may be connected by opening a connecting pipeline in the cylinder body 95 .

[0081] Optionally, the second cylinder 2 is made of metal, and the second cylinder 2 can reflect the light emitted by the photocatalytic light source 4 , and the reflected light re-enters the annular reaction channel 110 to improve the adequacy of the photocatalytic reaction in the annular reaction channel 110 .

[0082] In one embodiment, one of the base plate 6 and the end cover 7 is provided with a cooling medium inlet 51 connected to the second cooling channel 120, and the other of the base plate 6 and the end cover 7 is provided with a cooling medium outlet 54 connected to the second cooling channel 120, so as to continuously provide cooling air for the second cooling channel 120 and ensure the cooling effect.

[0083] Please continue to refer to Figure 1 As shown, in one embodiment, the photocatalytic reactor 100 also includes a cooling jacket 8, which is arranged around the photocatalytic light source 4, the top of the cooling jacket 8 is connected to the end cover 7, the bottom of the cooling jacket 8 is connected to the bottom plate 6, and a third cooling channel 81 is formed in the cooling jacket 8. The cooling jacket 8 is provided with a third cooling inlet 82 and a third cooling outlet 83 which are connected to the third cooling channel 81.

[0084] Among them, by forming a third cooling channel 81 in the cooling jacket 8, the heat generated by the photocatalytic light source 4 can be quickly taken away, thereby further reducing the overall temperature of the photocatalytic reactor 100 and improving the reaction efficiency.

[0085] The third cooling channel 81 can be continuously provided with cooling medium through the third cooling inlet 82 and the third cooling outlet 83 to ensure the cooling effect. Further, the third cooling inlet 82 and the third cooling outlet 83 are connected to a cooling circulation pump. Preferably, the cooling medium of the third cooling channel 81 is liquid. In another embodiment, the cooling medium of the third cooling channel 81 is gas.

[0086] Optionally, a plurality of third cooling inlets 82 and a plurality of third cooling outlets 83 are provided on the cooling jacket 8, and the plurality of third cooling inlets 82 and the plurality of third cooling outlets 83 are arranged around the cooling jacket 8 to improve the cooling effect.

[0087] In one embodiment, the photocatalytic reactor 100 includes multiple types of first cylinders 1, which are detachably connected to the end cover 7. The gaps between the first cylinders 1 and the second cylinders 2 of different types are different to form annular reaction channels 110 of different sizes.

[0088] The size of the gap between the first cylinder 1 and the second cylinder 2 is d1, referring to Figure 2 . Under different process production conditions, annular reaction channels 110 of different sizes are required. In this case, this can be achieved by replacing the first cylinder 1. For example, different photocatalytic reactions may require different photocatalytic light sources 4, and different photocatalytic light sources 4 generate different light and have different penetration abilities to different reaction liquids. When the penetration ability of light to the reaction liquid is weak, in order to ensure the efficiency of the photocatalytic reaction, it may be necessary to reduce the gap between the first cylinder 1 and the second cylinder 2. At the same time, when the penetration ability of light to the reaction liquid is strong, the gap between the first cylinder 1 and the second cylinder 2 can be increased to achieve large-scale production.

[0089] Please continue to refer to Figure 2 As shown, in one embodiment, the photocatalytic reactor further includes a fastening assembly 160, which connects the end cap 7 and the first cylinder 1, and includes a second fastener 161 and a plurality of stacked gaskets. The fastening assembly 160 serves to connect the end cap 7 and the first cylinder 1, and at the same time, seals the end cap 7 and the first cylinder 1 to ensure the sealing of the annular reaction channel 110.

[0090] Optionally, the second fastener 161 is a bolt or a screw, the plurality of gaskets include a first gasket 162, a second gasket 163 and a third gasket 164, the first gasket 162 is arranged between the first cylinder 1 and the end cover 7, the second gasket 163 is arranged on the side of the first cylinder 1 away from the end cover 7, the third gasket 164 is arranged on the side of the second gasket 163 away from the end cover 7, and the second fastener 161 passes through the third gasket 164, the second gasket 163, the first cylinder 1, and the first gasket 162 in sequence and is connected to the end cover 7. The first gasket 162 and the second gasket 163 are made of flexible materials, and the third gasket 164 is made of rigid material, so as to ensure the structural strength while ensuring the sealing performance.

[0091] Please continue to refer to Figure 3As shown, in one embodiment, the annular reaction channel 110 has a reaction inlet 111 and a reaction outlet 112, and the photocatalytic reactor 100 also includes an inlet guide 170 and / or an outlet guide 180. The inlet guide 170 is arranged close to the reaction inlet 111, and is used to divert the medium entering from the reaction inlet 111 into the annular reaction channel 110; the outlet guide 180 is arranged close to the reaction outlet 112, and is used to divert the catalytic product flowing out of the annular reaction channel 110 to the reaction outlet 112.

[0092] Among them, by setting the inlet guide member 170, the medium flowing into the annular reaction channel 110 through the inlet can be more evenly distributed in the annular reaction channel 110; by setting the outlet guide member 180, the flow dead zone inside the annular reaction channel 110 is avoided, so that the catalytic product can flow out more evenly, and the problem of low conversion rate caused by different reaction residence time of the medium in the annular reaction channel 110 can also be avoided.

[0093] Optionally, the inlet guide member 170 includes a plurality of inlet guide plates, which are arranged at intervals along the circumference of the second cylinder 2 to form a plurality of inlet guide channels. Further, one end of the plurality of inlet guide channels is in a convergent shape, for receiving the reaction liquid entering from the reaction inlet 111; the other end is in a divergent shape, for evenly diverting the reaction liquid to the surroundings of the second cylinder 2 into the annular reaction channel 110, so as to improve the efficiency of photocatalysis. Further, the plurality of inlet guide plates are integrally arranged and mounted on the second cylinder 2.

[0094] Optionally, the outlet guide member 180 includes a plurality of outlet guide plates, which are arranged at intervals along the circumference of the second cylinder 2 to form a plurality of outlet guide channels. Furthermore, from the reaction inlet 111 to the reaction outlet 112, the gaps between adjacent outlet guide plates gradually decrease, and an opening connected to the reaction outlet 112 is formed. After the reaction products in the annular reaction channel 110 are guided by the outlet guide plates, they enter the plurality of openings and flow out from the plurality of reaction outlets 112, so that the reaction products can flow to the reaction outlet 112 more evenly in the circumferential direction, thereby improving the efficiency of photocatalysis.

[0095] The photocatalytic reactor 100 provided in the present application includes a first cooling channel 21, a second cooling channel 120, a third cooling channel 81 and a fourth cooling channel 41. By providing multiple cooling channels to cool the photocatalytic reactor 100 at the same time, the cooling effect is improved.

[0096] When the photocatalytic reactor 100 provided in the present application is in operation, the reaction liquid continuously flows into the annular reaction channel 110 from the reaction inlet 111, and the reaction product generated by the photocatalytic reaction flows out from the reaction outlet 112. It should be noted that the reaction liquid flowing in from the reaction inlet 111 will produce other liquids or gases after the photocatalytic reaction, so what flows out from the reaction outlet 112 is the reaction product, which is different from the reaction liquid flowing in from the reaction inlet 111.

[0097] Preferably, each cooling channel is connected to a circulation pump for circulating the cooling medium in the cooling channel. At the same time, during catalysis, the reaction temperature can be detected in real time, and the power of the circulation pump can be adjusted according to the reaction temperature to keep the reaction temperature at the target temperature.

[0098] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired results.

[0099] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of the above embodiments of the present application, which are not provided in detail for the sake of simplicity.

[0100] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A photocatalytic reactor, characterized in that: include: a first cylinder and a second cylinder, wherein the second cylinder is disposed in the first cylinder, the first cylinder and the second cylinder are spaced apart to form an annular reaction channel, and a first cooling channel is disposed in the second cylinder; A photocatalytic light source is arranged around the first cylinder, and a second cooling channel is arranged between the photocatalytic light source and the first cylinder; Wherein, the first cylinder is a light-transmitting cylinder, and the light emitted by the photocatalytic light source can be irradiated into the annular reaction channel through the first cylinder.

2. The photocatalytic reactor according to claim 1, characterized in that: The photocatalytic reactor further comprises a bottom plate and a sealing clamping assembly. The bottom plate is sleeved on the first cylinder. The sealing clamping assembly is at least partially disposed between the bottom plate and the first cylinder to seal the bottom plate and the first cylinder.

3. The photocatalytic reactor according to claim 2, characterized in that: The sealing clamping assembly includes a first fastener, a first seal and a first pressing member. A first groove is annularly provided on the base plate. The first seal is partially provided in the first groove and abuts against the outer wall of the first cylinder. The first fastener passes through the first pressing member and the base plate, and is used to drive the first pressing member to squeeze the first seal. The first pressing member abuts against the first seal, and is used to squeeze the first seal driven by the first fastener until the first seal is pressed against the outer wall of the first cylinder.

4. The photocatalytic reactor according to claim 1, characterized in that: The photocatalytic reactor also includes a connecting seat, which is provided with a cooling medium inlet and a first opening opened toward the second cooling channel, the orthographic projection of the cooling medium inlet on the target plane and the orthographic projection of the second cooling channel on the target plane do not overlap, and the cooling medium inlet is connected to the second cooling channel through the first opening; wherein, the target plane is any plane perpendicular to the axial direction of the first cylinder.

5. The photocatalytic reactor according to claim 4, characterized in that: The connecting seat is arranged at the top and / or bottom of the photocatalytic light source; And / or, the connection seat includes a baffle, which is used to change the flow direction of the cooling medium in the connection seat to guide the cooling medium entering the connection seat from the cooling medium inlet to the first opening; And / or, the connection seat is provided with a plurality of first openings in the circumferential direction and connected with the second cooling channel.

6. The photocatalytic reactor according to claim 5, characterized in that: The photocatalytic light source is detachably connected to the connecting seat; The photocatalytic reactor includes a plurality of connection seats of different models.

7. The photocatalytic reactor according to claim 1, characterized in that: A fourth cooling channel is disposed at the back of the photocatalytic light source, and the fourth cooling channel has a fourth cooling inlet and a fourth cooling outlet.

8. The photocatalytic reactor according to claim 7, characterized in that: The photocatalytic reactor further comprises a third pipe, the cooling pipe of the fourth cooling channel penetrates the third pipe, and a second sealing member is arranged between the third pipe and the cooling water pipe of the fourth cooling channel; And / or, the photocatalytic reactor further comprises a fourth pipe, a power line of the photocatalytic light source passes through the fourth pipe, and a third sealing member is arranged between the fourth pipe and the power line of the photocatalytic light source.

9. The photocatalytic reactor according to claim 1, characterized in that: The photocatalytic reactor also includes a third cylinder and a first pipe. The third cylinder is arranged in the second cylinder. The third cylinder and the second cylinder are spaced apart to form a first gap. The first pipe penetrates the third cylinder from top to bottom. The first gap is connected to the first pipe to constitute part of the first cooling channel. The first cooling channel has a first cooling inlet and a first cooling outlet.

10. The photocatalytic reactor according to claim 9, characterized in that: The photocatalytic reactor also includes a second pipe, which is sleeved on the first pipe to form a third gap therebetween, the third gap is connected to the first gap, the first coolant inlet is arranged on the first pipe, and the first cooling outlet is arranged on the second pipe.

11. The photocatalytic reactor according to claim 10, characterized in that: The photocatalytic reactor also includes an end cover, and the third cylinder includes a cylinder body and a second connecting piece, the second connecting piece is connected between the end cover and the cylinder body, the second connecting piece is arranged around the first pipe, and the second connecting piece is circumferentially provided with a plurality of second openings for connecting the first gap and the third gap.

12. The photocatalytic reactor according to claim 1, characterized in that: The photocatalytic reactor further comprises a cooling jacket, which is arranged around the photocatalytic light source, and a third cooling channel is formed in the cooling jacket. A third cooling inlet and a third cooling outlet which are connected to the third cooling channel are arranged on the cooling jacket.

13. The photocatalytic reactor according to claim 1, characterized in that: The photocatalytic reactor comprises an end cover and the first cylinder of various models, wherein the first cylinder is detachably connected to the end cover, and the gaps between the first cylinder and the second cylinder of different models are different to form annular reaction channels of different sizes.

14. The photocatalytic reactor according to claim 1, characterized in that: The photocatalytic reactor further comprises an end cover and a fastening assembly, wherein the fastening assembly connects the end cover and the first cylinder, and the fastening assembly comprises a second fastener and a plurality of stacked gaskets.

15. The photocatalytic reactor according to claim 1, characterized in that: The annular reaction channel has a reaction inlet and a reaction outlet, and the photocatalytic reactor further includes an inlet guide and / or an outlet guide, wherein the inlet guide is arranged near the reaction inlet and is used to divert the medium entering from the reaction inlet into the annular reaction channel; The outlet guide is disposed close to the reaction outlet and is used to divert the catalytic products flowing out of the annular reaction channel to the reaction outlet.

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