A heterogeneous flow reactor for in-situ microscopic optical diagnostics

Abstract

This application provides a heterogeneous flow reactor for in-situ microscopic optical diagnostics, belonging to the field of online combustion diagnostics technology. The reactor includes a heater, a reactor disposed within the heater, an upper heat insulation plate for thermal insulation, and a top cover mounted on the heater. The reactor includes a reaction chamber for heterogeneous chemical reactions, a reactor inlet for gas-phase flow diversion, and a reactor outlet for gas-phase reaction products. The reaction chamber has a bifurcated dual-inlet structure. The reactor provided in this application uses a 3D-printed bifurcated dual-inlet structure, which enables uniform spatial flow; the high-temperature heating zone has a regular cuboid structure, facilitating fluid dynamics simulation and chemical reaction kinetic analysis.

Description

Technical Field

[0001] This application belongs to the field of online combustion diagnostic technology, specifically relating to a heterogeneous flow reactor for microscopic in-situ optical diagnostics. Background Technology

[0002] Aero engines operate under high temperature and high pressure environments, with combustion chamber temperatures far exceeding the melting point of metals. To achieve stable operation, the metal needs cooling, employing methods such as film cooling, convection cooling, and regenerative cooling. Regenerative cooling utilizes the endothermic properties of aviation kerosene, simultaneously cooling the metal walls and preheating the kerosene. However, within the regenerative cooling pipeline, the aviation kerosene undergoes pyrolysis, potentially leading to coking and carbon buildup on the pipeline walls, affecting heat transfer efficiency and, in severe cases, causing blockages. To accurately study the pyrolysis and coking characteristics of aviation kerosene under high-temperature conditions using optical methods in situ, a heterogeneous flow reactor compatible with in-situ microscopic optical diagnostics is required.

[0003] Several existing reactors have various drawbacks. Chinese patents CN113318683A and CN113218933A disclose a multifunctional low dead volume gas-solid phase reactor suitable for various in-situ spectral characterizations, and CN113218933A disclose a photocatalytic in-situ Raman spectroscopy measurement system. Both patents propose in-situ detection devices coupled with Raman spectroscopy, but these devices are not suitable for the study and analysis of chemical reaction kinetics. CN114146663A discloses a flow tube reactor based on gas-phase catalysis. This reactor can perform heterogeneous reactions such as gas-phase catalysis, but it cannot be coupled with microscopic optical diagnostic equipment for in-situ, dynamic observation of catalyst changes. CN115266690A discloses a device and method for simultaneously performing heterogeneous photochemical reactions of different wavelengths. This technical solution involves the interaction of light and heterogeneous reactions, but it only provides a constant-temperature medium (e.g., water) and cannot be heated to study high-temperature reactions.

[0004] Therefore, there is a need to provide a heterogeneous flow reactor that can be used in conjunction with microscopic in-situ optical diagnostics. Summary of the Invention

[0005] The purpose of this application is to provide a heterogeneous flow reactor that can be used in conjunction with in-situ microscopic optical diagnostics. The fluid region of the reactor should have a clear and concise physicochemical model to facilitate reaction kinetics research and simulation. The reactor should be capable of high-temperature heating to enable pyrolysis coking studies at temperatures ranging from room temperature to 1200°C. The reactor should be compatible with a precision displacement stage to achieve precise scanning imaging of the coking region. The reactor should have a light-transmitting window to enable in-situ microscopic studies.

[0006] To achieve the above objectives, this application provides the following technical solution: a heterogeneous flow reactor for in-situ microscopic optical diagnosis, the reactor comprising a heater, a reactor disposed within the heater, an upper heat insulation plate for heat insulation, and a top cover mounted on top of the heater.

[0007] The reactor includes a reaction chamber for carrying out heterogeneous chemical reactions, a reactor inlet for enabling gas-phase flow diversion input, and a reactor outlet for enabling gas-phase reaction products output.

[0008] The reaction chamber is equipped with a bifurcated dual-inlet structure.

[0009] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also has the following features: the heater includes a shell, thermocouples and ceramic beads mounted on the side of the shell, a lower heat insulation body mounted inside the shell for heat insulation between the heater and the reactor, a first heating insulation plate placed below the reaction chamber for laying heating wires, a second heating insulation plate disposed below the reactor inlet and reactor outlet for laying heating wires, a first heating insulation sheet for insulating the heating wires from the reaction chamber, a second heating insulation sheet for insulating the heating wires from the reactor inlet and reactor outlet, a first filling block for filling the gap between the reaction chamber and the first heating insulation sheet, and a second filling block for filling the gap between the reactor inlet, reactor outlet and the second heating insulation sheet.

[0010] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also has the following features: the outer shell includes an outer shell mounting hole for fixing the reactor, an outer shell top threaded hole for mounting a top cover, an outer shell side threaded hole for mounting thermocouples and ceramic beads, and an outer shell groove for mating with the reactor.

[0011] The thermocouple is provided with thermocouple mounting threads for thermocouple installation, and there are multiple thermocouples.

[0012] The ceramic bead is provided with ceramic bead mounting threads for mounting the ceramic bead and ceramic bead through holes for leading the heating wire out of the heater.

[0013] The lower insulation body is provided with a lower insulation body groove for cooperating with the reactor, a first through hole on the side of the lower insulation body for inserting a thermocouple, and a second through hole on the side of the lower insulation body for leading out the heating wire.

[0014] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also has the following feature: the first heating insulating plate is provided with a first heating insulating plate heating wire groove for laying heating wires and a first heating insulating plate threaded hole for fixing the first heating insulating sheet.

[0015] The second heating insulation plate is provided with a heating wire groove for laying heating wires and a threaded hole for fixing the second heating insulation sheet.

[0016] The first heating insulating sheet is provided with a first heating insulating sheet screw through hole for fixing the first heating insulating sheet.

[0017] The second heating insulating sheet is provided with a screw through hole for fixing the second heating insulating sheet.

[0018] The first filler block is provided with a first filler block thermocouple groove for the thermocouple to pass through and a first filler block screw groove for avoiding interference between the structure and the components.

[0019] The second filler block has a second filler block thermocouple groove for the thermocouple to pass through and a second filler block screw groove for avoiding interference with the structure.

[0020] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also has the following features: the reaction chamber includes a reaction chamber body, a substrate placed inside the reaction chamber body, a substrate fixing member and substrate fixing screws for fixing the substrate, a light window for light transmission mounted on the reaction chamber, and a light window fixing piece for fixing the light window.

[0021] The reactor inlet is equipped with a reactor inlet flange, a reactor inlet sealing ring for sealing between the reactor inlet and the reaction chamber, a reactor inlet circular pipe for conveying the reaction gas, and a reactor inlet circular pipe sealing ring for sealing between the reactor inlet circular pipe and the reactor inlet flange.

[0022] The reactor outlet is equipped with a reactor outlet flange, a reactor outlet sealing ring for sealing between the reactor outlet and the reaction chamber, a reactor outlet circular pipe for conveying reaction gas, and a reactor outlet circular pipe sealing ring for sealing between the reactor outlet circular pipe and the reactor outlet flange.

[0023] The heterogeneous flow reactor for in-situ optical microscopy provided in this application further features the following characteristics: the reaction chamber body is provided with a reaction chamber thermocouple groove for thermocouples, a reaction chamber substrate groove for placing a substrate, a reaction chamber substrate fixing threaded hole for mounting the substrate, a reaction chamber inlet flange for connecting to the reactor inlet, a reaction chamber inlet flange threaded hole for fixing the reaction chamber inlet flange, a reaction chamber outlet flange for connecting to the reactor outlet, a reaction chamber outlet flange screw through hole for fixing the reaction chamber outlet flange, a reaction chamber light window groove for mounting a light window, and a reaction chamber light window fixing threaded hole for mounting the light window.

[0024] The reaction chamber substrate groove has a rectangular cross-section.

[0025] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also has the following features: the substrate is provided with substrate fixing holes for inserting substrate fixing members to fix the substrate, substrate auxiliary holes for removing the substrate from the reaction chamber body, spare substrates for replacement, and substrate grooves for mounting spare substrates.

[0026] The substrate fixing member is provided with a substrate fixing member protrusion for inserting a substrate fixing hole to fix the substrate and a substrate fixing member arc for passing through a substrate fixing screw.

[0027] The substrate fixing screws are used to mount the substrate onto the reaction chamber body.

[0028] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also features the following characteristics: the reactor inlet flange is provided with a reactor inlet flange screw through hole for fixing the reactor inlet flange to the main body of the reaction chamber; a reactor inlet sealing ring groove for placing the reactor inlet sealing ring; a reactor inlet pipe threaded hole for installing the reactor inlet circular pipe; a reactor splitting dual inlet for splitting the flow; a reactor inlet splitting cavity for dividing the gas flowing in from the reactor inlet circular pipe into two sections and then conveying it to the reaction chamber through the reactor splitting dual inlet; and an arc structure for the reactor inlet splitting cavity.

[0029] The reactor inlet pipe is provided with a reactor inlet pipe thread for installing the reactor inlet pipe to the reactor inlet and a reactor inlet pipe through hole for conveying the reaction gas.

[0030] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also features a reactor outlet flange including a reactor outlet flange screw through hole for mounting the reactor outlet flange to the reaction chamber body, a reactor outlet sealing ring groove for placing the reactor outlet sealing ring, a reactor outlet pipe threaded hole for mounting the reactor outlet circular pipe, and a reactor outlet empty slot for avoiding structural interference.

[0031] The reactor outlet pipe is provided with a reactor outlet pipe thread for installing the reactor outlet pipe to the reactor outlet and a reactor outlet pipe through hole for conveying the reaction gas.

[0032] The heterogeneous flow reactor for in-situ optical microscopy provided in this application also has the feature that the upper heat insulation plate is provided with light-transmitting holes for the transmission of laser and scattered light required for optical diagnosis.

[0033] The top cover is provided with a top cover light transmission hole for optical diagnostics and a top cover screw through hole for mounting the top cover on the top of the housing.

[0034] Beneficial effects

[0035] The reactor provided in this application adopts a 3D-printed "one-to-two" bifurcated dual-inlet structure, which can achieve uniform flow in space; the high-temperature heating zone has a regular cuboid structure, which facilitates fluid dynamics simulation and chemical reaction kinetics analysis.

[0036] The reactor provided in this application adopts a replaceable solid-phase reaction substrate structure, and the gaseous fluid sweeps from above to achieve heterogeneous reaction; the substrate is fixed with fasteners and screws to ensure that the substrate will not move under the action of airflow.

[0037] The reactor provided in this application adopts a planar close-packed heating wire structure, with separate temperature control at the inlet, outlet, and reaction chamber to achieve segmented and uniform heating. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a structural assembly diagram of the heterogeneous flow reactor provided in the embodiments of this application;

[0040] Figure 2 This is a structural assembly diagram of the heater provided in an embodiment of this application;

[0041] Figure 3 This is a structural diagram of the outer casing and lower heat insulation body provided in the embodiments of this application;

[0042] Figure 4 This is a structural diagram of the ceramic bead provided in the embodiments of this application;

[0043] Figure 5This is a structural diagram of a thermocouple provided in an embodiment of this application;

[0044] Figure 6 This is a three-dimensional structural assembly drawing of the reactor provided in the embodiments of this application;

[0045] Figure 7 This is a three-dimensional structural assembly diagram of the reaction chamber provided in the embodiments of this application;

[0046] Figure 8 An assembly diagram of the substrate provided in the embodiments of this application;

[0047] Figure 9 This is an assembly diagram of the reaction chamber inlet provided in an embodiment of this application;

[0048] Figure 10 This is a cross-sectional view of the reaction chamber inlet flange provided in an embodiment of this application;

[0049] Figure 11 The reaction chamber outlet assembly provided in the embodiments of this application;

[0050] Figure 12 This is a schematic diagram of the substrate structure provided in an embodiment of this application.

[0051] Wherein: 1. Heater; 10. Housing; 101. Housing groove; 102. Threaded hole on the side of the housing; 103. Housing mounting hole; 104. Threaded hole on the top of the housing; 11. Thermocouple; 111. Thermocouple mounting thread; 12. Ceramic bead; 121. Ceramic bead mounting thread; 122. Ceramic bead through hole; 13. Lower insulation body; 131. Lower insulation body groove; 132. First through hole on the side of the lower insulation body; 133. Second through hole on the side of the lower insulation body; 14. First heating insulation plate; 141. Heating wire groove of the first heating insulation plate; 142. Threaded hole of the first heating insulation plate; 15. Second heating insulation plate; 151. Heating wire groove of the second heating insulation plate; 152. Threaded hole of the second heating insulation plate; 16. First heating insulation sheet; 161. 17. First heating insulating sheet screw through hole; 17. Second heating insulating sheet; 171. Second heating insulating sheet screw through hole; 18. First filling block; 181. First filling block thermocouple groove; 182. First filling block screw groove; 19. Second filling block; 191. Second filling block thermocouple groove; 192. Second filling block screw groove; 2. Reactor; 21. Reaction chamber; 211. Reaction chamber body; 2111. Reaction chamber thermocouple groove; 2112. Reaction chamber substrate groove; 2113. Reaction chamber substrate fixing threaded hole; 2114. Reaction chamber outlet flange; 2115. Reaction chamber outlet flange threaded hole; 2116. Reaction chamber inlet flange; 2117. Reaction chamber inlet flange threaded hole; 2118. Reaction chamber light window groove; 2119. 212. Reaction chamber light window fixing threaded hole; 2121. Substrate; 2121. Substrate fixing hole; 2122. Substrate auxiliary hole; 2123. Substrate groove; 2124. Spare substrate; 213. Substrate fixing component; 2131. Substrate fixing component protrusion; 2132. Substrate fixing component arc; 214. Substrate fixing screw; 215. Light window; 216. Light window fixing piece; 2161. Light window fixing piece screw through hole; 22. Reactor inlet; 221. Reactor inlet flange; 2211. Reactor inlet flange screw through hole; 2212. Reactor inlet sealing ring groove; 2213. Reactor inlet pipe threaded hole; 2214. Reactor inlet diversion cavity; 2215. Reactor inlet diversion cavity arc structure; 2216. Reactor diversion Dual inlets; 222, Reactor inlet sealing ring; 223, Reactor inlet circular pipe sealing ring; 224, Reactor inlet circular pipe; 2241, Reactor inlet circular pipe thread; 2242, Reactor inlet circular pipe through hole; 23, Reactor outlet; 231, Reactor outlet flange; 2311, Reactor outlet flange screw through hole; 2312, Reactor outlet sealing ring groove; 2313, Reactor outlet pipe threaded hole; 2314, Reactor outlet empty slot; 232, Reactor outlet sealing ring; 233, Reactor outlet circular pipe sealing ring; 234, Reactor outlet circular pipe; 2341, Reactor outlet circular pipe thread; 2342, Reactor outlet circular pipe through hole; 3, Upper heat insulation plate; 31, Upper heat insulation plate light transmission hole; 4, Top cover;41. Light-transmitting hole in the top cover; 42. Screw hole in the top cover. Detailed Implementation

[0052] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be noted that these embodiments are not intended to limit the present application. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present application.

[0053] In the description of the embodiments of this application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the creation of 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 the creation of this application.

[0054] Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0055] The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0056] like Figures 1-12 As shown, a heterogeneous flow reactor for in-situ microscopic optical diagnosis is provided. The reactor includes a heater 1, a reactor 2 disposed within the heater 1, an upper heat insulation plate 3 for heat insulation, and a top cover 4 installed on the top of the heater. The reactor 2 includes a reaction chamber 21 for heterogeneous chemical reactions, a reactor inlet 22 for gas phase flow diversion input, and a reactor outlet 23 for gas phase reaction product output. The reaction chamber 21 is provided with a bifurcated dual inlet structure.

[0057] The gas flow area of ​​the reaction chamber provided in the above embodiment has a rectangular cross section and adopts a "one-to-two" bifurcated dual-inlet structure processed by 3D printing to achieve uniform spatial flow in a regular area. This reactor has both the flow uniformity characteristics of a chemical reaction kinetic flow reactor and the microscopic observation characteristics of an optical reactor.

[0058] In some embodiments, such as Figure 2 As shown, the heater includes a housing 10, thermocouples 11 and ceramic beads 12 mounted on the side of the housing 10, a lower heat insulation body 13 mounted inside the housing 10 for heat insulation between it and the reactor 2, a first heating insulation plate 14 placed below the reaction chamber 21 for laying heating wires, a second heating insulation plate 15 disposed below the reactor inlet 22 and the reactor outlet 23 for laying heating wires, a first heating insulation sheet 16 for insulating the heating wires from the reaction chamber 21, a second heating insulation sheet 17 for insulating the heating wires from the reactor inlet 22 and the reactor outlet 23, a first filling block 18 for filling the gap between the reaction chamber 21 and the first heating insulation sheet 16, and a second filling block 19 for filling the gap between the reactor inlet 22, the reactor outlet 23 and the second heating insulation sheet 17.

[0059] In the above embodiments, the first insulating plate 14 and the second insulating plate 15 of the heater 1 are arranged respectively, and a planar close-packed heating wire structure is adopted. The reaction chamber 21, the reactor inlet 22 and the reactor outlet 23 are heated and temperature controlled respectively, realizing separate heating of the three spatial sections.

[0060] In some embodiments, such as Figures 3-5 As shown, the outer shell 10 includes an outer shell mounting hole 103 for fixing the reactor 2, an outer shell top threaded hole 104 for mounting the top cover 4, an outer shell side threaded hole 102 for mounting thermocouples 11 and ceramic beads 12, and an outer shell groove 101 for cooperating with the reactor 2. The thermocouples 11 are provided with thermocouple mounting threads 111 for mounting the thermocouples 11, and there are multiple thermocouples 11. The ceramic beads 12 are provided with ceramic bead mounting threads 121 for mounting the ceramic beads 12 and ceramic bead through holes 122 for leading the heating wire out from the heater 1. The lower insulation body 13 is provided with a lower insulation body groove 131 for cooperating with the reactor 2, a lower insulation body side first through hole 132 for inserting the thermocouples 11, and a lower insulation body side second through hole 133 for leading the heating wire out.

[0061] In some embodiments, there are five thermocouples 11 in total. Three of them are placed in the reaction chamber thermocouple groove 2111 below the reaction chamber 21 through the threaded hole 102 on the side of the outer shell, the first through hole 132 on the side of the lower insulation body, and the first filler block thermocouple groove 181. The fourth thermocouple is placed below the reactor inlet 22 through the threaded hole 102 on the side of the outer shell, the first through hole 132 on the side of the lower insulation body, and the second filler block thermocouple groove 191. The fifth thermocouple is placed below the reactor outlet 23 through the threaded hole 102 on the side of the outer shell, the first through hole 132 on the side of the lower insulation body, and the second filler block thermocouple groove 191.

[0062] In some embodiments, the first heating insulation plate 14 is provided with a first heating insulation plate heating wire groove 141 for laying heating wires and a first heating insulation plate threaded hole 142 for fixing the first heating insulation sheet 16. The second heating insulation plate 15 is provided with a second heating insulation plate heating wire groove 151 for laying heating wires and a second heating insulation plate threaded hole 152 for fixing the second heating insulation sheet 17. The first heating insulation sheet 16 is provided with a first heating insulation sheet screw through hole 161 for fixing the first heating insulation sheet 16. The screw passes through the first heating insulation sheet screw through hole 161 and is fastened to the first heating insulation plate threaded hole 142, thereby fixing the first heating insulation sheet 16 to the first heating insulation plate 14. The second heating insulation sheet 17 is provided with a second heating insulation sheet screw through hole 171 for fixing the second heating insulation sheet 17. The screw passes through the second heating insulation sheet screw through hole 171 and is fastened to the second heating insulation plate threaded hole 152, thereby fixing the second heating insulation sheet 17 to the second heating insulation plate 15. The first filler block 18 is provided with a first filler block thermocouple groove 181 for the thermocouple 11 to pass through and a first filler block screw groove 182 for avoiding structural interference. The first filler block screw groove 182 avoids structural interference between the first filler block 18 and the thermocouple 11, screws, etc. The second filler block 19 is provided with a second filler block thermocouple groove 191 for the thermocouple 11 to pass through and a second filler block screw groove 192 for avoiding structural interference. The second filler block screw groove 192 avoids structural interference between the second filler block 19 and the thermocouple 11, screws, etc.

[0063] In some embodiments, such as Figures 6-7As shown, the reaction chamber 21 includes a reaction chamber body 211, a substrate 212 placed inside the reaction chamber body 211, a substrate fixing member 213 and a substrate fixing screw 214 for fixing the substrate 212, a light window 215 for light transmission installed on the reaction chamber 21, and a light window fixing piece 216 for fixing the light window 215. The reactor inlet 22 is provided with a reactor inlet flange 221, a reactor inlet sealing ring 222 for sealing between the reactor inlet 22 and the reaction chamber 21, a reactor inlet circular pipe 224 for conveying reaction gas, and a reactor inlet circular pipe sealing ring 223 for sealing between the reactor inlet circular pipe 224 and the reactor inlet flange 221. The reactor outlet 23 is provided with a reactor outlet flange 231, a reactor outlet sealing ring 232 for sealing between the reactor outlet 23 and the reaction chamber 21, a reactor outlet circular pipe 234 for conveying reaction gas, and a reactor outlet circular pipe sealing ring 233 for sealing between the reactor outlet circular pipe 234 and the reactor outlet flange 231. The reactor inlet sealing ring 222, reactor inlet circular tube sealing ring 223, reactor outlet sealing ring 232, and reactor outlet circular tube sealing ring 233 are all made of flexible graphite material and can withstand high temperatures of approximately 800℃. The light window fixing plate 216 is provided with a light window fixing plate screw through hole 2161.

[0064] In some embodiments, the reaction chamber body 211 is provided with a reaction chamber thermocouple groove 2111 for placing the thermocouple 11, a reaction chamber substrate groove 2112 for placing the substrate 212, a reaction chamber substrate fixing threaded hole 2113 for mounting the substrate 212, a reaction chamber inlet flange 2116 for connecting to the reactor inlet 22, a reaction chamber inlet flange threaded hole 2117 for fixing the reaction chamber inlet flange 2116, a reaction chamber outlet flange 2114 for connecting to the reactor outlet 23, a reaction chamber outlet flange screw through hole 2115 for fixing the reaction chamber outlet flange 2114, a reaction chamber light window groove 2118 for mounting the light window 215, and a reaction chamber light window fixing threaded hole 2119 for mounting the light window 215. The reaction chamber substrate groove 2112 has a rectangular cross-section. The reaction chamber substrate groove 2112 has a rectangular cross-section and is also the area where the high-temperature chemical reaction occurs. Its typical dimensions are a cross-sectional width of 26 mm, a cross-sectional height of 5 mm, and a total length of 129 mm. High-temperature resistant sealant is applied between the reaction chamber light window slot 2118, light window 215, and light window fixing piece 216 to achieve a seal.

[0065] In some embodiments, such as Figure 8 and Figure 12As shown, the substrate 212 is provided with a substrate fixing hole 2121 for inserting the substrate fixing member 213 to fix the substrate, a substrate auxiliary hole 2122 for removing the substrate 212 from the reaction chamber body 211, a spare substrate 2124 for replacement, and a substrate groove 2123 for installing the spare substrate 2124. The substrate fixing member 213 is provided with a substrate fixing member protrusion 2131 for inserting into the substrate fixing hole 2121 to fix the substrate 212 and a substrate fixing member arc 2132 for passing through the substrate fixing screw 214. The substrate fixing screw 214 is used to install the substrate 212 onto the reaction chamber body 211. The substrate 212 can be removed from the reaction chamber substrate groove 2112 using tools such as hooks and tweezers. The spare substrate 2124 can be conveniently and cost-effectively processed and prepared, placed in the substrate groove 2123, and replaced for each experiment. The typical dimensions are 36mm in length, 22mm in width, and 2.5mm in thickness.

[0066] In the above embodiments, the spare substrate 2124 can be replaced for different experimental conditions. The substrate can be made of smooth stainless steel to study the deposition of gaseous particles, or it can be pre-deposited with catalyst particles to achieve the universal function of studying different types of heterogeneous reactions. The substrate fixing member 213 fixes the substrate 212 in the substrate groove 2112 of the reaction chamber, ensuring that the substrate 212 will not be displaced under the action of airflow.

[0067] In some embodiments, such as Figures 9-10 As shown, the reactor inlet flange 221 is provided with a reactor inlet flange screw through hole 2211 for fixing the reactor inlet flange 221 to the reaction chamber body 211, a reactor inlet sealing ring groove 2212 for placing the reactor inlet sealing ring 222, a reactor inlet pipe threaded hole 2213 for installing the reactor inlet circular pipe 224, a reactor diversion dual inlet 2216 for diverting the flow, a reactor inlet diversion cavity 2214 for dividing the gas flowing in from the reactor inlet circular pipe 224 into two sections and then conveying it to the reaction chamber 21 through the reactor diversion dual inlet 2216, and a reactor inlet diversion cavity arc structure 2215. The reactor inlet circular pipe 224 is provided with a reactor inlet circular pipe thread 2241 for installing the reactor inlet circular pipe 224 to the reactor inlet 22 and a reactor inlet circular pipe through hole 2242 for conveying the reaction gas.

[0068] The technical solution provided in the above embodiments enables the gas entering from the reactor inlet circular pipe 224 to enter the reaction chamber 21 through dual inlets after being split, making the gas flow in the reaction chamber 21 more uniform. The arc structure 2215 of the reactor inlet split chamber avoids boundary layer separation and other phenomena that are detrimental to flow stability from occurring inside the reactor inlet split chamber 2214.

[0069] In some embodiments, such as Figure 11 As shown, the reactor outlet flange 231 includes a reactor outlet flange screw through hole 2311 for mounting the reactor outlet flange 231 on the reaction chamber body 211, a reactor outlet sealing ring groove 2312 for placing the reactor outlet sealing ring 232, a reactor outlet pipe threaded hole 2313 for mounting the reactor outlet circular pipe 234, and a reactor outlet empty slot 2314 for avoiding structural interference. The reactor outlet circular pipe 234 is provided with a reactor outlet circular pipe thread 2341 for mounting the reactor outlet circular pipe 234 to the reactor outlet 23 and a reactor outlet circular pipe through hole 2342 for conveying the reaction gas.

[0070] The reactor outlet vacancy groove 2314 in the above embodiment avoids spatial structural interference between the substrate fixing member 213 and the reactor outlet flange 231.

[0071] In some embodiments, the upper heat insulation plate 3 is provided with an upper heat insulation plate light transmission hole 31 for transmitting laser and scattered light required for optical diagnosis, and the top cover 4 is provided with a top cover light transmission hole 41 for optical diagnosis and a top cover screw through hole 42 for mounting the top cover 4 on the top of the housing 10. Screws passing through the top cover screw through hole 42 and fixed to the threaded hole 104 on the top of the housing can be used to install the top cover 4.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above description is merely a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A heterogeneous flow reactor for in-situ microscopic optical diagnosis, characterized in that, The reactor includes a heater (1), a reactor (2) disposed inside the heater (1), an upper heat insulation plate (3) for heat insulation and heat preservation, and a top cover (4) installed on the top of the heater (1). The reactor (2) includes a reaction chamber (21) for carrying out heterogeneous chemical reactions, a reactor inlet (22) for realizing the input of gas phase flow splitting, and a reactor outlet (23) for realizing the output of gas phase reaction products. The reaction chamber (21) is provided with a bifurcated double-inlet structure. The reaction chamber (21) includes a reaction chamber body (211), a substrate (212) placed inside the reaction chamber body (211), a substrate fixing member (213) and a substrate fixing screw (214) for fixing the substrate (212), a light window (215) installed on the reaction chamber (21) for light transmission, and a light window fixing piece (216) for fixing the light window (215). The reactor inlet (22) is provided with a reactor inlet flange (221), a reactor inlet sealing ring (222) for sealing between the reactor inlet (22) and the reaction chamber (21), a reactor inlet circular pipe (224) for conveying reaction gas, and a reactor inlet circular pipe sealing ring (223) for sealing between the reactor inlet circular pipe (224) and the reactor inlet flange (221). The reactor outlet (23) is provided with a reactor outlet flange (231), a reactor outlet sealing ring (232) for sealing between the reactor outlet (23) and the reaction chamber (21), a reactor outlet circular pipe (234) for conveying reaction gas, and a reactor outlet circular pipe sealing ring (233) for sealing between the reactor outlet circular pipe (234) and the reactor outlet flange (231).

2. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 1, characterized in that, The heater (1) includes a housing (10), a thermocouple (11) and a ceramic bead (12) mounted on the side of the housing (10), a lower heat insulation body (13) mounted inside the housing (10) for heat insulation between the heater and the reactor, a first heating insulation plate (14) placed below the reaction chamber (21) for laying heating wires, a second heating insulation plate (15) placed below the reactor inlet (22) and the reactor outlet (23) for laying heating wires, a first heating insulation sheet (16) for achieving insulation between the heating wires and the reaction chamber (21), a second heating insulation sheet (17) for achieving insulation between the heating wires and the reactor inlet (22) and the reactor outlet (23), a first filling block (18) for filling the gap between the reaction chamber (21) and the first heating insulation sheet (16), and a second filling block (19) for filling the gap between the reactor inlet (22), the reactor outlet (23) and the second heating insulation sheet (17).

3. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 2, characterized in that, The outer casing (10) includes an outer casing mounting hole (103) for fixing the reactor (2), an outer casing top threaded hole (104) for mounting the top cover (4), an outer casing side threaded hole (102) provided on the side for mounting thermocouples (11) and ceramic beads (12), and an outer casing groove (101) for cooperating with the reactor (2). The thermocouple (11) is provided with thermocouple mounting threads (111) for thermocouple installation, and there are multiple thermocouples (11). The ceramic bead (12) is provided with a ceramic bead mounting thread (121) for mounting the ceramic bead and a ceramic bead through hole (122) for leading the heating wire out of the heater (1). The lower insulation body (13) is provided with a lower insulation body groove (131) for cooperating with the reactor (2), a first through hole (132) on the side of the lower insulation body for inserting a thermocouple (11), and a second through hole (133) on the side of the lower insulation body for leading out the heating wire.

4. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 2, characterized in that, The first heating insulation plate (14) is provided with a first heating insulation plate heating wire groove (141) for laying heating wire and a first heating insulation plate threaded hole (142) for fixing the first heating insulation sheet (16). The second heating insulation plate (15) is provided with a second heating insulation plate heating wire groove (151) for laying heating wire and a second heating insulation plate threaded hole (152) for fixing the second heating insulation sheet (17). The first heating insulating sheet (16) is provided with a first heating insulating sheet screw through hole (161) for fixing the first heating insulating sheet (16). The second heating insulating sheet (17) is provided with a second heating insulating sheet screw through hole (171) for fixing the second heating insulating sheet (17). The first filler block (18) is provided with a first filler block thermocouple groove (181) for the thermocouple (11) to pass through and a first filler block screw groove (182) for avoiding interference between the structure and the structure. The second filler block (19) is provided with a second filler block thermocouple groove (191) for the thermocouple (11) to pass through and a second filler block screw groove (192) for avoiding interference between the structure and the structure.

5. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 1, characterized in that, The reaction chamber body (211) is provided with a reaction chamber thermocouple groove (2111) for placing a thermocouple (11), a reaction chamber substrate groove (2112) for placing a substrate (212), a reaction chamber substrate fixing threaded hole (2113) for mounting the substrate (212), a reaction chamber inlet flange (2116) for connecting to the reactor inlet (22), a reaction chamber inlet flange threaded hole (2117) for fixing the reaction chamber inlet flange (2116), a reaction chamber outlet flange (2114) for connecting to the reactor outlet (23), a reaction chamber outlet flange screw through hole (2115) for fixing the reaction chamber outlet flange (2114), a reaction chamber light window groove (2118) for installing the light window (215), and a reaction chamber light window fixing threaded hole (2119) for realizing the installation of the light window. The reaction chamber substrate groove (2112) has a rectangular cross-section.

6. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 1, characterized in that, The substrate (212) is provided with a substrate fixing hole (2121) for inserting a substrate fixing member (213) to fix the substrate, a substrate auxiliary hole (2122) for removing the substrate (212) from the reaction chamber body (211), a spare substrate (2124) for replacement, and a substrate groove (2123) for installing the spare substrate (2124). The substrate fixing member (213) is provided with a substrate fixing member protrusion (2131) for inserting the substrate fixing hole (2121) to fix the substrate (212) and a substrate fixing member arc (2132) for passing through the substrate fixing screw (214). The substrate fixing screw (214) is used to install the substrate (212) onto the reaction chamber body (211).

7. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 1, characterized in that, The reactor inlet flange (221) is provided with a reactor inlet flange screw through hole (2211) for fixing the reactor inlet flange (221) to the reaction chamber body (211), a reactor inlet sealing ring groove (2212) for placing the reactor inlet sealing ring (222), a reactor inlet pipe threaded hole (2213) for installing the reactor inlet round pipe (224), a reactor splitting double inlet (2216) for splitting the flow, a reactor inlet splitting cavity (2214) for splitting the gas flowing in from the reactor inlet round pipe (224) into two sections and then transporting it to the reaction chamber (21) through the reactor splitting double inlet (2216), and a reactor inlet splitting cavity arc structure (2215). The reactor inlet pipe (224) is provided with a reactor inlet pipe thread (2241) for installing the reactor inlet pipe (22) to the reactor inlet (22) and a reactor inlet pipe through hole (2242) for conveying the reaction gas.

8. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 1, characterized in that, The reactor outlet flange (231) includes a reactor outlet flange screw through hole (2311) for mounting the reactor outlet flange (231) on the reaction chamber body (211), a reactor outlet sealing ring groove (2312) for placing the reactor outlet sealing ring (232), a reactor outlet pipe threaded hole (2313) for installing the reactor outlet circular pipe, and a reactor outlet empty slot (2314) for avoiding structural interference. The reactor outlet pipe (234) is provided with a reactor outlet pipe thread (2341) for installing the reactor outlet pipe (234) to the reactor outlet (23) and a reactor outlet pipe through hole (2342) for conveying the reaction gas.

9. The heterogeneous flow reactor for in-situ microscopic optical diagnosis according to claim 1, characterized in that, The upper heat insulation plate (3) is provided with an upper heat insulation plate light transmission hole (31) for transmitting laser and scattered light required for optical diagnosis. The top cover (4) is provided with a top cover light transmission hole (41) for optical diagnostic light transmission and a top cover screw through hole (42) for mounting the top cover (4) on the top of the heater (1).

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