Photocatalytic series reactor

Abstract

The embodiment of the utility model discloses a photocatalytic series reactor. The photocatalytic series reactor comprises a first tank body and a second tank body, the first tank body is provided with a cooling water inlet and a cooling water outlet, and the lower part of the second tank body is positioned in the first tank body; the top of the second tank body is covered with a filtering cover plate, and the side wall of the upper part is provided with an air inlet, an air outlet and a first feed port; the lower part of the second tank body is divided into a second chamber and a third chamber through a partition plate, the second chamber is communicated with the first chamber, and the third chamber is isolated from the first chamber; the second tank body is provided with a second feed port communicated with the second cavity and a feed pipe communicated with the third cavity and provided with a third feed port, the partition plate is provided with a series pipe communicated with the second cavity and the third cavity, a threaded control valve is arranged between the feed pipe and the series pipe, and a piston of the threaded control valve has a first state in which the series pipe is sealed; and a second state in which the series tube is extended. According to the embodiment of the invention, cascade reaction can be completed in a single device, the reaction structure is simplified, and the reaction efficiency can be remarkably improved.

Description

Technical Field

[0001] This application relates to the field of photocatalytic equipment technology, and in particular to a photocatalytic tandem reactor. Background Technology

[0002] A photocatalytic reactor is used to realize photochemical or photocatalytic reactions and mainly consists of a light source, a reaction chamber, and a catalyst support. The light source provides light of a specific wavelength to excite the catalyst. The catalyst adsorbs reactant molecules, generating electron-hole pairs under photoexcitation, initiating a redox reaction. The reaction chamber provides space for the reaction, controls the reaction conditions, and promotes the conversion of reactants into products under the action of the catalyst.

[0003] In related technologies, traditional photocatalytic reactors are often limited in their functionality, and their structure and configuration are usually only suitable for performing a single type of reaction. For example, in many common photocatalytic oxidation processes, photocatalytic reactors are optimized for the oxidation of specific substrates. For instance, in the use of titanium dioxide-based photocatalysts to degrade organic pollutants in wastewater, the internal components, including the light source layout, catalyst immobilization method, and reaction chamber design, are tailored to meet the reaction requirements of this step.

[0004] However, tandem reactions are favored in numerous chemical and environmental applications. A tandem reaction refers to two or more consecutive reactions occurring in a single reaction system without the need to separate intermediate products. In photocatalysis, an example of a tandem reaction is the sequential conversion of raw materials into more complex and valuable products through multiple reaction steps. For instance, starting with a simple organic compound, a photocatalytic dehydrogenation reaction can be performed, followed immediately by a photocatalytic coupling reaction, resulting in a new compound with superior performance.

[0005] Currently, a common approach to tandem reactions is to combine two independent photocatalytic reactors. While this method seems simple and straightforward, it suffers from several significant drawbacks. First, the connection between the two reactors often results in complex piping systems and cumbersome operating procedures; precise control of the transfer of reaction intermediates between the two reactors is required, which increases the risk of intermediate loss and contamination. Second, the overall reaction efficiency is severely affected. The transfer process between the reactors can lead to a decrease in the concentration of active species, and the transfer process is often delayed, resulting in unsatisfactory reaction conditions and a reduced reaction rate. Therefore, there is an urgent need to develop a single-device photocatalytic reactor capable of efficiently completing tandem reactions. Utility Model Content

[0006] To address at least one of the problems mentioned in the background art, embodiments of this application provide a large photocatalytic tandem reactor that can complete tandem reactions within a single device, which not only simplifies the reaction structure but also significantly improves reaction efficiency.

[0007] To achieve the above objectives, embodiments of this application provide a photocatalytic tandem reactor, comprising a first tank and a second tank;

[0008] The top of the first tank is open, a cooling water inlet is provided on the lower part of one side wall of the first tank, and a cooling water outlet is provided on the upper part of the other side wall of the first tank; the height of the second tank is greater than that of the first tank, and the lower part of the second tank is located inside the first tank.

[0009] The top of the second tank has an opening and is covered with a filter cover. The upper side wall of the second tank is provided with opposite air inlets and exhaust outlets. The upper side wall of the second tank is also provided with a first feed inlet. The lower part of the second tank is divided into a second chamber and a third chamber by a partition. The second chamber is connected to the first chamber in the upper part of the second tank. The top of the third chamber is provided with a top plate to isolate it from the first chamber.

[0010] The side wall of the second tank is provided with a second inlet that connects to the second chamber;

[0011] The second tank body has a feed pipe with a third inlet connected to the third chamber on its side wall. A series pipe connecting the second chamber and the third chamber is provided on the partition plate at the position corresponding to the extension line of the feed pipe. A threaded control valve is provided between the feed pipe and the series pipe. The threaded control valve includes a control head and a piston. When operated by the control head, the piston has a first state of sealing itself in the series pipe to isolate the second chamber and the third chamber, and a second state of extending out of the series pipe to connect the second chamber and the third chamber.

[0012] In one feasible implementation, the bottom walls of the second tank and the first tank are integrally connected;

[0013] The partition includes an annular plate structure integrally connected to the inner bottom surface of the second tank, and the annular plate extends along the height direction;

[0014] The top plate includes an annular plate structure integrally connected between the outer periphery of the partition and the inner side of the second tank, and the annular plate extends in the horizontal direction.

[0015] In one feasible implementation, the feed pipe passes radially through the first tank and connects to the side wall of the second tank, and the threaded control valve further includes a valve stem and a threaded guide block;

[0016] The threaded guide block is installed inside the feed pipe. The threaded guide block includes a threaded part, a connecting part, and a guide part connected sequentially from the outside to the inside. A threaded hole is opened at the center of the threaded part, and a guide hole is opened at the center of the guide part.

[0017] The valve stem includes a threaded rod and a smooth rod connected to each other. The control head is connected to the threaded rod and located outside the feed pipe. The threaded rod is threaded into the threaded hole, and the smooth rod passes through the guide hole.

[0018] The piston is connected to the end of the light rod away from the control head, and the piston is tightly fitted with the series tube;

[0019] The third inlet is located on the feed pipe at a position corresponding to the threaded guide block and the second tank.

[0020] In one feasible implementation, the series tube is located within the second chamber, and a downwardly bent guide tube is provided at one end of the series tube near the center of the second chamber.

[0021] In one feasible implementation, the feed tube is a tapered tube with a diameter that gradually decreases from the outside to the inside, and the threaded guide block is correspondingly and tightly fitted inside the tapered tube; a sealing cap that limits the threaded guide block is provided at the outer end of the feed tube.

[0022] In one feasible implementation, an ultrasonic vibrator is disposed below the first tank.

[0023] In one feasible implementation, both the first tank and the second tank are made of a light-transmitting material.

[0024] In one feasible implementation, the outer wall of the second tank is sealed to the opening of the first tank.

[0025] In one possible implementation, the system further includes a first light-shielding plate for covering the top of the third chamber and a second light-shielding plate for covering the top of the second chamber.

[0026] In one feasible implementation, the cooling water inlet, the cooling water outlet, the air inlet, the exhaust outlet, the first feed inlet, the second feed inlet, and the third feed inlet are all provided with pipelines integrally connected to the corresponding tank body, and the outer end of the pipeline is provided with a quick-connect plug structure.

[0027] This application provides a photocatalytic tandem reactor, including a first tank and a second tank. In use, the reaction takes place in the second tank, while cooling water is introduced into the first tank to cool the reaction. Specifically, cooling water is introduced into the first tank through a cooling water inlet and discharged from the first tank through a cooling water outlet. Gas is introduced into the second tank through an air inlet and discharged from the second tank through an air outlet. Material is fed or sampled into the first chamber through a first feed inlet, into the second chamber through a second feed inlet, and into the third chamber through a third feed inlet. In some cases, materials can also be added to the first or second chamber through a filter cover.

[0028] When a photocatalytic tandem reaction is required, the on / off state of the second and third chambers is controlled by a threaded control valve. For example, raw materials are added to the third and second chambers through the third and second inlets, respectively. The threaded control valve is then opened to connect the second and third chambers, and a vacuum is created in the second tank through the exhaust port. The connection between the second and third chambers is then closed, and saturated gas is introduced into the third chamber. The connection between the second and third chambers is then opened again and illuminated with light. The raw materials in the third chamber undergo a photocatalytic reaction, and the product obtained in the third chamber enters the second chamber as raw material to participate in further photocatalytic reactions. Thus, two consecutive reactions can be initiated sequentially without separating intermediate products, achieving a photocatalytic tandem reaction.

[0029] The photocatalytic tandem reactor of this application embodiment can realize the tandem reaction with only a single device, simplifying the reaction structure and avoiding complex piping systems; reducing the risk of intermediate loss and pollution; providing suitable reaction conditions, improving the reaction rate and reaction effect, and opening up new possibilities for wide application in the fields of chemistry, environmental protection and energy conversion. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the photocatalytic tandem reactor provided in the embodiments of this application;

[0032] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10-Photocatalytic tandem reactor;

[0035] 100 - First tank;

[0036] 110 - Cooling water inlet; 120 - Cooling water outlet;

[0037] 200 - Second tank;

[0038] 210 - First chamber; 211 - First feed inlet; 212 - Air inlet; 213 - Exhaust outlet;

[0039] 220 - Second chamber; 221 - Second feed inlet; 222 - Baffle plate; 223 - Series pipe; 224 - Guide pipe;

[0040] 230 - Third chamber; 231 - Third feed inlet; 232 - Top plate; 233 - Feed pipe;

[0041] 240-Filter Cover Plate;

[0042] 250 - Threaded control valve; 251 - Control head; 252 - Valve stem; 253 - Piston; 254 - Threaded guide block; 2541 - Threaded part; 2542 - Connecting part; 2543 - Guide part; 255 - Sealing cap;

[0043] 300-Ultrasonic vibrator. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. It is worth noting that the embodiments described in the accompanying drawings are only some embodiments of this application, and not all embodiments. That is, the embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0045] The following will combine Figure 1 and Figure 2 The photocatalytic tandem reactor 10 provided in the embodiments of this application will be described.

[0046] This application provides a photocatalytic tandem reactor 10, such as... Figure 1 As shown, it includes a first tank 100 and a second tank 200.

[0047] The top of the first tank 100 is open. A cooling water inlet 110 is provided on the lower part of one side wall of the first tank 100, and a cooling water outlet 120 is provided on the upper part of the other side wall of the first tank 100. The height of the second tank 200 is greater than that of the first tank 100, and the lower part of the second tank 200 is located inside the first tank 100.

[0048] The top of the second tank 200 is open and covered with a filter cover 240. The upper side wall of the second tank 200 is provided with opposing air inlets 212 and exhaust outlets 213. The upper side wall of the second tank 200 is also provided with a first feed inlet 211. The lower part of the second tank 200 is divided into a second chamber 220 and a third chamber 230 by a partition 222. The second chamber 220 is connected to the first chamber 210 in the upper part of the second tank 200. The top of the third chamber 230 is provided with a top plate 232 to isolate it from the first chamber 210.

[0049] The side wall of the second tank 200 is provided with a second inlet 221 that connects to the second chamber 220.

[0050] The side wall of the second tank 200 is provided with a feed pipe 233 having a third feed inlet 231 that connects to the third chamber 230. A series pipe 223 connecting the second chamber 220 and the third chamber 230 is provided on the partition plate 222 at the position corresponding to the extension line of the feed pipe 233. A threaded control valve 250 is provided between the feed pipe 233 and the series pipe 223. The threaded control valve 250 includes a control head 251 and a piston 253. The piston 253, operated by the control head 251, has a first state in which it is sealed in the series pipe 223 to isolate the second chamber 220 and the third chamber 230, and a second state in which it extends out of the series pipe 223 to connect the second chamber 220 and the third chamber 230.

[0051] Cooling water is introduced into the first tank 100 to cool the lower part of the second tank 200 and absorb the heat released during the photochemical or photocatalytic reaction process. Correspondingly, the upper part of the second tank 200 is not enclosed by the first tank 100, and some reactions that do not require cooling can take place in the upper part of the second tank 200, i.e., the first chamber 210.

[0052] A light source, such as a xenon lamp, can be installed on the top of the second tank 200. The light emitted by the light source illuminates the filter cover 240, which filters and allows light of a specific wavelength to enter the inner cavity of the second tank 200, exciting the catalyst to carry out a photochemical or photocatalytic reaction.

[0053] The inlet 212 and outlet 213 of the second tank 200 can introduce and discharge gases into and out of the second tank 200. Depending on the actual situation, these gases can be gases that participate in the reaction or gases that are used to create a vacuum environment.

[0054] The first feed inlet 211 and the second feed inlet 221 are located on the side wall of the second tank 200, and the third feed inlet 231 is located on the side wall of the feed pipe 233. The three feed inlets can usually be used to feed the corresponding chambers, and in some cases they can also be used as sampling ports.

[0055] The second chamber 220 and the third chamber 230 can be separated into left and right chambers by a partition 222, wherein the partition 222 can extend radially or be bent. The second chamber 220 and the third chamber 230 can also be separated into inner and outer chambers by a partition 222 with the following annular plate structure.

[0056] The control head 251 of the threaded control valve 250 is located outside the feed pipe 233. By operating the control head 251, the piston 253 is moved in and out of the series pipe 223, thereby achieving the sealing and separation of the series pipe 223 and the piston 253, and realizing the state switching between the first state and the second state of the piston 253.

[0057] The following example illustrates an application of this application using the photocatalytic tandem reaction of CO2 reduction followed by CO insertion.

[0058] S1: Add the reaction materials to the second chamber 220 and the third chamber 230 respectively, and introduce cooling water into the first tank 100. After the operation is completed, close all water inlets, material inlets and gas inlets, and seal the filter cover 240.

[0059] Specifically, a Ni-based catalyst and [Ru(bpy)3]Cl2·6H2O are added to a mixed solution containing acetonitrile and deionized water, and triethanolamine is added to the above mixed solution to form a reaction mixture. The reaction mixture is then injected into the third chamber 230 through the third inlet 231. After injection, the third inlet 231 is sealed.

[0060] Aryl iodide, Pd(PPh3)4 / C3N4, Et3N, and aromatic amine are added into the second chamber 220 through the second feed port 221 or the filter cover 240, followed by the addition of anhydrous 1,4-dioxane as a solvent. After the filling is completed, the second feed port 221 and the filter cover 240 are sealed.

[0061] Cooling water is introduced into the first tank 100 through the cooling water inlet 110 to keep all water inlets, material inlets and air inlets in a sealed and closed state.

[0062] S2: The control head 251 is operated to put the piston 253 in the second state, connecting the second chamber 220 and the third chamber 230. CO2 is introduced into the second tank 200 through the third feed port 231 or the air inlet 212. After the introduction is completed, the third feed port 231 is sealed and the air inlet valve of the air inlet 212 is closed.

[0063] S3: Place the entire photocatalytic tandem reactor 10 in a frozen environment, and evacuate the second tank 200 through the exhaust port 213 to prevent the anhydrous 1,4-dioxane in the second chamber 220 from turning into gas at room temperature and being removed. After evacuation, close the exhaust valve of the exhaust port 213.

[0064] The CO2 introduction step and the freezing and vacuuming operation in this step can be repeated three times to ensure the vacuuming effect. Finally, remove the photocatalytic reactor and bring it to room temperature.

[0065] S4: The control head 251 is operated to put the piston 253 in the first state, isolating the second chamber 220 and the third chamber 230. Saturated CO2 at a partial pressure of 1 atm is continuously introduced into the third chamber 230 through the third feed port 231 for 30 minutes, and then the third feed port 231 is sealed. During this process, the second chamber 220 is kept under vacuum.

[0066] S5: Irradiate the second tank 200 with a xenon lamp (wavelength ≥ 420nm, 300W) from above the filter cover 240. Operate the control valve to put the piston 253 in the second state, connecting the second chamber 220 and the third chamber 230.

[0067] At this time, a photocatalytic reduction of CO2 to CO reaction occurs in the second chamber 220. Specifically, a Ni-based catalyst is used, with [Ru(bpy)3]Cl2·6H2O as the photosensitizer, triethanolamine as the sacrificial agent (i.e., electron donor), and a mixed solution of acetonitrile and deionized water as the reaction solvent.

[0068] In the third chamber 230, the product CO from the second chamber 220 is used as a reactant, and unreacted CO2 is also introduced into the third chamber. It reacts with aryl iodide, aromatic amine, and 1,4-dioxane solvent. Triethylamine is then added to make the reaction system alkaline. The reaction is carried out using Pd(PPh3)4 / C3N4 as a catalyst, and the partial pressure of the system is maintained at 1 atm.

[0069] During this reaction, cooling water is continuously supplied to the first tank 100 to continuously cool down the heating reaction.

[0070] The photocatalytic tandem reaction equations for the second chamber 220 and the third chamber 230 are as follows:

[0071] CO2→CO

[0072]

[0073] The photocatalytic tandem reactor 10 of this application embodiment can realize the tandem reaction with only a single device, simplifying the reaction structure and avoiding complex piping systems; reducing the risk of intermediate loss and pollution; providing suitable reaction conditions, improving the reaction rate and reaction effect, and opening up new possibilities for wide application in the fields of chemistry, environmental protection and energy conversion.

[0074] In one feasible implementation, such as Figure 1As shown, the bottom walls of the second tank 200 and the first tank 100 are integrally connected.

[0075] The partition 222 includes an annular plate structure integrally connected to the inner bottom surface of the second tank 200, and the annular plate extends along the height direction.

[0076] The top plate 232 includes an annular plate structure integrally connected between the outer periphery of the partition plate 222 and the inner side of the second tank 200, and the annular plate extends in the horizontal direction.

[0077] In this way, the first tank 100 and the second tank 200 are connected as a single unit, which facilitates manufacturing and use.

[0078] The lower part of the second tank 200 is divided into a third chamber 230 located on the outer ring and a second chamber 220 located in the center by a partition 222. The three chambers can be arranged coaxially, which facilitates the operation of the threaded control valve 250 and also facilitates the installation of the light-shielding plates described below to illuminate the different chambers.

[0079] The top plate 232 is integrally connected to the partition 222 and the inner side of the second tank 200 to ensure that the first chamber 210 and the third chamber 230 are isolated from each other.

[0080] In one feasible implementation, such as Figure 2 As shown, the feed pipe 233 passes radially through the first tank 100 and connects to the side wall of the second tank 200. The threaded control valve 250 also includes a valve stem 252 and a threaded guide block 254.

[0081] The threaded guide block 254 is installed at the port outside the feed pipe 233. The threaded guide block 254 includes a threaded part 2541, a connecting part 2542 and a guide part 2543 connected sequentially from the outside to the inside. The threaded part 2541 has a threaded hole at its axial center and the guide part 2543 has a guide hole at its axial center.

[0082] The valve stem 252 includes a threaded rod and a smooth rod that are connected to each other. The control head 251 is connected to the threaded rod and is located outside the feed pipe 233. The threaded rod is threaded into the threaded hole, and the smooth rod passes through the guide hole.

[0083] The piston 253 is connected to the end of the light rod away from the control head 251, and the piston 253 is in close contact with the series tube 223.

[0084] The third inlet 231 is located on the feed pipe 233 between the threaded guide block 254 and the second tank 200.

[0085] The three parts of the threaded guide block 254 can be integrally manufactured or interconnected. It is understood that when the diameter of the smooth portion of the valve stem 252 is slightly smaller than the diameter of the threaded hole, the smooth portion of the valve stem 252 can pass through the threaded hole from one end of the threaded portion 2541 and then enter the guide hole to engage with it; when the diameter of the smooth portion of the valve stem 252 is slightly larger than the diameter of the threaded hole, the threaded portion of the valve stem 252 can pass through the guide hole from one end of the guide portion 2543 and then enter the threaded hole to engage with it; finally, the control head 251 and the piston 253 are connected.

[0086] The guide hole fits tightly with the smooth rod, providing a good sealing effect and guiding the movement direction of the valve stem 252, facilitating the movement of the piston 253 within the series tube 223.

[0087] In this way, rotating the control head 251, through the threaded engagement of the threaded rod and the threaded part 2541, causes the guide rod to drive the piston 253 to move axially along the series tube 223 under the guidance of the guide part 2543, thereby realizing the switching between the first state and the second state.

[0088] In one feasible implementation, such as Figure 1 and Figure 2 As shown, the series pipe 223 is located inside the second chamber 220, and a downwardly bent guide pipe 224 is provided at one end of the series pipe 223 near the center of the second chamber 220.

[0089] This avoids unnecessary impacts on feeding and reaction caused by placing the series tube 223 in the third chamber 230. The guide tube 224 can promote the downward flow of the product in the third chamber 230, increase the reaction contact time and contact area in the second chamber 220, and improve the reaction efficiency.

[0090] In one feasible implementation, the feed pipe 233 is a tapered tube with a gradually decreasing diameter from the outside to the inside, and the threaded guide block 254 is correspondingly and tightly fitted inside the tapered tube. A sealing cap 255 that defines the threaded guide block 254 is fitted at the outer end of the feed pipe 233.

[0091] In this way, the tapered structure allows for a tighter fit between the threaded guide block 254 and the feed pipe 233, improving the sealing effect and preventing air leakage or air ingress into the second tank 200. The sealing cap 255 further enhances the sealing effect between the threaded guide block 254 and the feed pipe 233.

[0092] In one feasible implementation, such as Figure 1 As shown, an ultrasonic vibrator 300 is installed below the first tank 100.

[0093] The use of an ultrasonic vibrator 300 can vibrate the second tank 200, making the reaction more complete and improving the reaction efficiency.

[0094] In one feasible implementation, both the first tank 100 and the second tank 200 are made of a light-transmitting material.

[0095] For example, the first tank 100 and the second tank 200 can both be made of glass to facilitate light exposure and observation.

[0096] In one feasible implementation, the outer wall of the second tank 200 is sealed to the opening of the first tank 100.

[0097] This prevents cooling water leakage from the first tank 100 and improves the cooling effect.

[0098] In one possible implementation, it also includes a first light-shielding plate for covering the top of the third chamber 230 and a second light-shielding plate for covering the top of the second chamber 220.

[0099] The shapes of the first and second light-shielding plates correspond to the top shapes of the third and second chambers, and they have a light-shielding function to prevent them from being affected by light.

[0100] In this way, the photocatalytic effect on the third chamber 230 or the second chamber 220 can be controlled by selecting to cover the first light-shielding plate or the second light-shielding plate.

[0101] In one feasible implementation, such as Figure 1 As shown, cooling water inlet 110, cooling water outlet 120, air inlet 212, exhaust outlet 213, first feed inlet 211, second feed inlet 221 and third feed inlet 231 are all equipped with pipelines that are integrally connected to the corresponding tank body, and the outer end of the pipeline is set as a quick-connect plug structure.

[0102] The outer end of the pipeline can have a tapered quick-connect spigot for connecting quick-connect fittings, and valves or caps can be installed on the pipeline to seal the second tank 200. All of the above can adopt existing technological structures, and will not be elaborated further.

[0103] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" in the description of this application should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0104] The terms “upper,” “lower,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0105] The term "multiple" means two or more, unless otherwise specified precisely.

[0106] The terms “first,” “second,” “third,” “fourth,” etc., (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can include implementations in sequences other than those illustrated or described herein.

[0107] The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A photocatalytic tandem reactor, characterized in that, Including the first tank and the second tank; The top of the first tank is open, a cooling water inlet is provided on the lower part of one side wall of the first tank, and a cooling water outlet is provided on the upper part of the other side wall of the first tank; the height of the second tank is greater than that of the first tank, and the lower part of the second tank is located inside the first tank. The top of the second tank has an opening and is covered with a filter cover. The upper side wall of the second tank is provided with opposite air inlets and exhaust outlets. The upper side wall of the second tank is also provided with a first feed inlet. The lower part of the second tank is divided into a second chamber and a third chamber by a partition. The second chamber is connected to the first chamber in the upper part of the second tank. The top of the third chamber is provided with a top plate to isolate it from the first chamber. The side wall of the second tank is provided with a second inlet that connects to the second chamber; The second tank body has a feed pipe with a third inlet connected to the third chamber on its side wall. A series pipe connecting the second chamber and the third chamber is provided on the partition plate at the position corresponding to the extension line of the feed pipe. A threaded control valve is provided between the feed pipe and the series pipe. The threaded control valve includes a control head and a piston. When operated by the control head, the piston has a first state of sealing itself in the series pipe to isolate the second chamber and the third chamber, and a second state of extending out of the series pipe to connect the second chamber and the third chamber.

2. The photocatalytic tandem reactor according to claim 1, characterized in that, The bottom walls of the second tank and the first tank are integrally connected; The partition includes an annular plate structure integrally connected to the inner bottom surface of the second tank, and the annular plate extends along the height direction; The top plate includes an annular plate structure integrally connected between the outer periphery of the partition and the inner side of the second tank, and the annular plate extends in the horizontal direction.

3. The photocatalytic tandem reactor according to claim 2, characterized in that, The feed pipe passes radially through the first tank and connects to the side wall of the second tank; the threaded control valve also includes a valve stem and a threaded guide block. The threaded guide block is installed inside the feed pipe. The threaded guide block includes a threaded part, a connecting part, and a guide part connected sequentially from the outside to the inside. A threaded hole is opened at the center of the threaded part, and a guide hole is opened at the center of the guide part. The valve stem includes a threaded rod and a smooth rod connected to each other. The control head is connected to the threaded rod and located outside the feed pipe. The threaded rod is threaded into the threaded hole, and the smooth rod passes through the guide hole. The piston is connected to the end of the light rod away from the control head, and the piston is tightly fitted with the series tube; The third inlet is located on the feed pipe at a position corresponding to the threaded guide block and the second tank.

4. The photocatalytic tandem reactor according to claim 3, characterized in that, The series tube is located in the second chamber, and a downward-bent guide tube is provided at one end of the series tube near the center of the second chamber.

5. The photocatalytic tandem reactor according to claim 3, characterized in that, The feed tube is a tapered tube with a gradually decreasing diameter from the outside to the inside, and the threaded guide block is tightly fitted inside the tapered tube; a sealing cap that limits the threaded guide block is fitted at the outer end of the feed tube.

6. The photocatalytic tandem reactor according to any one of claims 1-5, characterized in that, An ultrasonic vibrator is installed at the bottom of the first tank.

7. The photocatalytic tandem reactor according to any one of claims 1-5, characterized in that, Both the first tank and the second tank are made of translucent materials.

8. The photocatalytic tandem reactor according to any one of claims 1-5, characterized in that, The outer wall of the second tank is sealed to the opening of the first tank.

9. The photocatalytic tandem reactor according to any one of claims 1-5, characterized in that, It also includes a first light-shielding plate for covering the top of the third chamber, and a second light-shielding plate for covering the top of the second chamber.

10. The photocatalytic tandem reactor according to any one of claims 1-5, characterized in that, The cooling water inlet, cooling water outlet, air inlet, exhaust outlet, first feed inlet, second feed inlet, and third feed inlet are all equipped with pipes integrally connected to the corresponding tank body, and the outer end of the pipes is configured as a quick-connect plug structure.

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