Micro-channel continuous reaction device applied to gas-liquid oxidation reaction and application method

Abstract

The invention discloses a micro-channel continuous reaction device applied to gas-liquid oxidation reaction. The micro-channel continuous reaction device comprises a feeding system, a micro-channel reaction module, a temperature control system, a product collection system and a control regulation system, the feeding system conveys a gas raw material and a liquid raw material into the micro-channel reaction module; the micro-channel reaction module comprises three or more micro-channel units which are connected in series, and each micro-channel unit comprises a plurality of gas-liquid mixers and a plurality of enhanced mixing reactors; the temperature control system is used for accurately controlling the reaction temperature; the product collecting system is used for separating and collecting reaction products; and the control adjusting system is used for monitoring and adjusting reaction conditions in real time. According to the invention, efficient mixing and uniform distribution of gas and liquid phases can be realized, the reaction efficiency is remarkably improved, side reactions are reduced, real-time monitoring and adjustment of reaction conditions are realized, and the operation stability and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-liquid oxidation reaction devices, and in particular to a microchannel continuous reaction device applied to gas-liquid oxidation reaction and an application method thereof. Background Art

[0002] In today's chemical industry, oxidation reactions, as one of the core processes, are widely used, playing an indispensable role in the synthesis of basic chemicals and the preparation of high-end fine chemicals. However, they also carry significant safety risks. As early as 2009, the Ministry of Emergency Management included oxidation processes in the first batch of hazardous chemical processes subject to key supervision, a move that demonstrates the high priority it places on oxidation reaction safety.

[0003] Currently, many high-end fine chemical projects are facing numerous difficulties during their implementation due to the high safety risk assessments associated with oxidation processes, hindering smooth implementation. Against this backdrop, the development of green and safe alternative oxidation processes has become a critical issue for the chemical industry. Air or oxygen, as environmentally friendly, cost-effective, and efficient oxidants, are naturally the preferred choice in most oxidation processes.

[0004] However, the reality is that using air or oxygen as an oxidant presents numerous thorny safety risks within traditional kettle or tower reactors. First, explosion hazards are a constant concern. Many reactants are inherently flammable. Once mixed with air or oxygen, they can easily reach their explosive limits, triggering flash explosions and posing significant threats to the lives of production personnel and corporate assets. Second, gas-liquid mass transfer is subpar. Most reagents have low dissolved oxygen levels, and traditional reactors offer suboptimal gas-liquid mass transfer. This directly leads to low reaction efficiency and reduced product yields, severely impacting production profitability. Third, temperature runaway is a frequent issue. Most oxidation reactions are exothermic. When the temperature of the reaction system reaches a critical point, it triggers a series of uncontrollable side reactions, even leading to explosions, placing the entire production process at risk.

[0005] Given this, the development of intrinsically safe, green oxidation processes, particularly safe and efficient oxidation processes using air or oxygen as oxidants, has become a crucial topic in chemical research, possessing both theoretical and practical significance. The emergence of microreactors offers new hope for resolving this challenge. They offer numerous unique advantages, including efficient and rapid mixing processes, and mass and heat transfer efficiencies far exceeding those of traditional reactors. They enable precise regulation of reaction temperature and residence time, enabling precise control of oxidation reactions. Furthermore, microreactors offer low liquid holdup, fundamentally reducing the potential for accidents caused by large material accumulation and significantly enhancing the inherent safety of the process.

[0006] A large number of practices and researches show that the use of micro-reactors for oxidation reactions can effectively overcome the problems of traditional oxidation processes, such as high risk, poor mass and heat transfer performance, poor selectivity, and low energy efficiency, and is expected to become a new direction for the development of oxidation processes in the future. However, the existing micro-channel reactors are not perfect, and there are still problems to be solved in the uniformity of gas-liquid two-phase distribution, the rationality of reactor structure design, and the operation flexibility, which restricts the further development of micro-reactors in the field of oxidation processes. SUMMARY

[0007] To solve the above technical problems, the purpose of the present application is to provide a micro-channel continuous reaction device and application method applied to gas-liquid oxidation reaction. The present application can realize efficient mixing and uniform distribution of gas-liquid two-phase, significantly improve the reaction efficiency, reduce the occurrence of side reactions, realize real-time monitoring and adjustment of reaction conditions, and improve the stability and safety of operation.

[0008] To achieve the above technical purposes and effects, the present application realizes the following technical solutions:

[0009] The present application provides a micro-channel continuous reaction device applied to gas-liquid oxidation reaction, which comprises a feeding system, a micro-channel reaction module, a temperature control system, a product collection system, and a control and adjustment system.

[0010] The feeding system delivers gas raw materials and liquid raw materials into the micro-channel reaction module.

[0011] The micro-channel reaction module comprises three or more micro-channel units connected in series, each micro-channel unit comprising a plurality of gas-liquid mixers and a plurality of enhanced mixing reactors, the enhanced mixing reactor being a cylindrical tube structure filled with a two-level structure of triangular spiral fillers and mixing enhancement materials; adjacent two enhanced mixing reactors are connected through a gas-liquid mixer, and each gas-liquid mixer is connected to a gas branch flow path.

[0012] The temperature control system is used to accurately control the reaction temperature.

[0013] The product collection system is used to separate and collect the reaction products.

[0014] The control and adjustment system is used to monitor and adjust the reaction conditions in real time.

[0015] Further, the feeding system comprises a preheater and a feeding pump connected by a pipeline.

[0016] Further, the gas-liquid mixer is a Venturi tube structure, which comprises an inlet section, a contraction section, a throat, and a diffusion section.

[0017] Furthermore, the gas-liquid mixer is provided with an air inlet and a liquid inlet.

[0018] Furthermore, the enhanced mixing reactor is a cylindrical tube structure, the interior of which is filled with 1.5-2 mm triangular spiral fillers and mixed reinforcement materials, and the mixed reinforcement materials are 0.1-1.0 mm catalysts and / or glass beads.

[0019] Furthermore, a bend pipe is connected between two adjacent enhanced mixing reactors in each microchannel unit to form a microchannel unit with a serpentine structure.

[0020] Furthermore, each microchannel unit is provided with a heat-conducting structure on the outside, which is formed by pressing two heat-conducting plates together. A mixing reactor placement position is provided in the heat-conducting structure, and the enhanced mixing reactor is placed in the mixing reactor placement position.

[0021] Furthermore, the temperature control system includes an integrated jacket, a multifunctional all-in-one machine and a temperature sensor; the integrated jacket is connected to the multifunctional all-in-one machine, the multifunctional all-in-one machine flows the medium into the integrated jacket, and the integrated jacket uses the medium flow to heat or cool the microchannel unit; the temperature sensor feeds back a temperature signal, the control and regulation system receives the temperature signal, analyzes it, and then sends a temperature adjustment instruction to the multifunctional all-in-one machine.

[0022] Furthermore, the control and regulation system includes a flow controller, a pressure sensor and an automatic control unit.

[0023] Another aspect of the present invention provides an application method of a microchannel continuous reaction device for a gas-liquid oxidation reaction, comprising the following steps: introducing gas and liquid raw materials through a feeding system, wherein the gas enters the microchannel unit in sections through a gas-liquid mixer, the gas and liquid phases are evenly distributed and efficiently mixed and reacted in the microchannel reaction module, and the reaction products enter a product collection system for separation and collection; during the reaction process, the reaction temperature is precisely controlled by a temperature control system, and the reaction conditions are monitored and adjusted in real time by a control and regulation system.

[0024] The technical effects of the present invention are:

[0025] (1) The present invention delivers gaseous raw materials and liquid raw materials to a microchannel reaction module through a feeding system. The module comprises three or more microchannel units connected in series, each of which is equipped with a gas-liquid mixer and an enhanced mixing reactor, which can achieve efficient mixing and uniform distribution of the gas and liquid phases, thereby significantly improving the reaction efficiency. At the same time, oxygen can enter the microchannel unit in sections using the gas branch inlet and the gas-liquid mixer of the device, realizing the segmented consumption of oxygen in the microchannel unit, which can better control the reaction heat removal and device pressure, thereby reducing the occurrence of side reactions, and further improving the selectivity and yield of the target product.

[0026] (2) The temperature control system of the present invention can accurately control the temperature during the reaction process, ensuring that the reaction proceeds under appropriate temperature conditions. Since oxidation reactions are generally exothermic reactions, accurate temperature control helps to avoid the occurrence of temperature runaway, preventing side reactions and safety hazards caused by excessive temperatures. It also helps to improve the selectivity and yield of the reaction, ensuring the stability and consistency of product quality.

[0027] (3) The present invention adopts a microchannel reactor with a small liquid holding capacity. Compared with traditional kettle or tower reactors, it greatly reduces the possibility of accidents caused by large amounts of material accumulation, thereby fundamentally improving the inherent safety of the reaction process.

[0028] (4) The device of the present invention has a compact structure, flexible operation, is applicable to a variety of gas-liquid reaction processes, and has broad application prospects.

[0029] (5) The control and regulation system of the present invention can monitor and adjust reaction conditions in real time, including parameters such as feed flow rate, reaction temperature, and pressure, ensuring stable operation of the reaction process and further enhancing the safety of the reaction process. The present invention utilizes a control and regulation system to achieve automated control, reducing the impact of human operational errors on the reaction process, improving the reliability and stability of the production process, and facilitating continuous and large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a partial structural schematic diagram of the microchannel continuous reaction device of the present invention.

[0031] Figure 2 It is a schematic structural diagram of the microchannel unit in the microchannel continuous reaction device of the present invention.

[0032] Figure 3 Schematic diagram of the structure of the gas-liquid mixer in the microchannel unit.

[0033] Figure 4 Schematic diagram of the structure of the enhanced mixing reactor in the microchannel unit.

[0034] Figure 5 It is a schematic structural diagram of the heat conducting plate in the microchannel continuous reaction device of the present invention.

[0035] In the figure, 1: liquid inlet, 2: gas inlet, 3: preheater, 4: feed pump, 5: gas-liquid mixer, 51: inlet section, 52: contraction section, 53: throat, 54: diffusion section, 6: enhanced mixing reactor, 7: heat conduction plate, 71: mixing reactor placement position, 8: product collection system. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0037] like Figures 1 to 5 A preferred embodiment of a microchannel continuous reaction device for gas-liquid oxidation reaction is shown, which includes a feeding system, a microchannel reaction module, a temperature control system, a product collection system and a control and regulation system.

[0038] Among them, the feeding system transports gaseous raw materials and liquid raw materials into the microchannel reaction module. Figure 1 As shown, the feeding system includes a gas inlet 2 and a liquid inlet 1, and both the gas inlet 2 and the liquid inlet 1 are provided with a preheater 3 and a feed pump 4, wherein there are two preheaters 3 on each inlet for preheating the raw materials.

[0039] The microchannel reaction module includes three or more microchannel units connected in series. Figure 1 In the preferred embodiment shown, three microchannel units are connected in series. This structure allows the reaction materials to flow in sections, and each microchannel unit holds less liquid, fundamentally eliminating the risk of explosive energy accumulation and complying with the inherent safety design principles of chemical processes.

[0040] Each microchannel unit includes a gas-liquid mixer 5 and an enhanced mixing reactor 6. The gas-liquid mixer 5 is used for gas-liquid mixing and is a venturi tube structure, including an inlet section 51, a contraction section 52, a throat 53 and a diffusion section 54. The specific parameters of the preferred embodiment are as follows: the inner diameter of the inlet section 51 is 0.8 mm, the angle of the contraction section 52 is 22°, the inner diameter length of the throat 53 is 0.5 mm, and the angle of the diffusion section 54 is 12°. The gas-liquid mixer 5 is provided with an air inlet and a liquid inlet, the air inlet is connected to the gas inlet 2, and the liquid inlet is connected to the liquid inlet 1. The enhanced mixing reactor 6 is a cylindrical tube structure with a pipe diameter of 6 mm and a length of 15-20 cm. The front end one-third is filled with a triangular spiral filler with a side length and height of 1.5-2 mm, and the rear end two-thirds is filled with catalysts or glass beads and other mixing enhancement materials that accelerate and enhance the mixing effect. In the gas-liquid mixer 5 with a venturi tube structure, the gas is sheared into micron-sized bubbles by high-speed liquid in the throat 53, which increases the gas-liquid contact area by 10-100 times, and can solve the problem of low reaction efficiency caused by low dissolved oxygen content. The design of the contraction section 52, throat 53 and diffusion section 54 of the gas-liquid mixer 5 achieves efficient induced turbulent mixing through acceleration-cavitation-pressure recovery. The enhanced mixing reactor 6 is filled with triangular spiral fillers, which induce the fluid to generate vortex secondary flow, achieve secondary enhancement, extend the bubble residence time, and the oxygen utilization rate can reach 95%. The catalyst filled in the enhanced mixing reactor 6 can reduce the reaction activation energy, provide active sites for the gas-liquid oxidation reaction, accelerate the electron transfer of oxygen to the reactants, and inhibit the side reaction path. The glass microbeads filled in the enhanced mixing reactor 6 can destroy the laminar boundary layer, induce the fluid to generate secondary vortex, cut the bubble droplets to the micron level, and eliminate the radial concentration gradient of the reactor to avoid incomplete local reaction.

[0041] Each microchannel unit includes a plurality of gas-liquid mixers 5 and a plurality of enhanced mixing reactors 6. Adjacent enhanced mixing reactors 6 are connected to the gas-liquid mixer 5 via an elbow to form a microchannel unit with a serpentine structure. Each gas-liquid mixer is connected to a gas branch flow path to introduce oxygen in sections through the gas branch flow path and the gas-liquid mixer. The oxygen enters the microchannel unit in sections, which can realize the segmented consumption of oxygen, better control the reaction heat removal and device pressure, thereby reducing the occurrence of side reactions, and thus improving the selectivity and yield of the target product.

[0042] Each microchannel unit is provided with a heat-conducting structure outside, which is formed by pressing two heat-conducting plates 7 together. A mixing reactor placement position 71 is provided in the heat-conducting structure, and the enhanced mixing reactor 6 is placed in the mixing reactor placement position 71.

[0043] The temperature control system includes an integrated jacket, a multifunction device, and a temperature sensor. The integrated jacket is wrapped around the outer surface of the heat-conducting structure and is connected to the multifunction device. The multifunction device is an intelligent temperature control device that integrates heating, cooling, circulation, and precise temperature control functions. It integrates an electric heater, refrigeration components, a magnetic pump, and other components. Its core function is to provide dynamic temperature regulation for the integrated jacket. The multifunction device flows the medium into the integrated jacket, and the integrated jacket uses the medium flow to heat or cool the microchannel unit. The temperature sensor feeds back the temperature signal, and the control and regulation system receives the temperature signal, analyzes it, and then sends a temperature adjustment instruction to the multifunction device.

[0044] The control and regulation system includes a flow controller, a pressure sensor, and an automated control unit. The automated control unit not only receives temperature signals from the temperature sensor and analyzes them to send temperature adjustment instructions to the multifunction device, but also dynamically adjusts reaction conditions such as pressure and flow using a PID algorithm.

[0045] This method for applying a microchannel continuous reaction device to a gas-liquid oxidation reaction includes the following steps: starting a control and regulation system and setting reaction temperature, pressure, and flow rate parameters. Gas and liquid raw materials are introduced through a feed system, wherein the gas enters the microchannel unit in sections through a gas-liquid mixer. The gas and liquid phases are evenly distributed and efficiently mixed and reacted within the microchannel reaction module. The reaction products enter a product collection system 8 for separation and collection. During the reaction, the reaction temperature is precisely controlled by a temperature control system, and the reaction conditions are monitored and adjusted in real time by the control and regulation system.

[0046] The reaction device and application method of the present invention are further described below through specific oxidation reaction examples.

[0047] Example 1

[0048] The device is applied to wax oxidation reaction. 0.5mm glass microbeads are filled into the rear two-thirds of the enhanced mixing reactor 6, and the front one-third of the enhanced mixing reactor 6 is filled with 1.5mm triangular spiral filler. After the raw wax is heated and melted, it is injected into the microchannel reaction module through the liquid inlet 1 via the feed pump 4. The outlet temperature of the feed pump is 80°C, and the flow rate is controlled at 10mL / min. Under standard conditions, oxygen is injected into each microchannel unit of the microchannel reaction module through the gas inlet 2 and the gas branch flow path in three sections (ratio 1:2:1), with a total flow rate of about 2L / min. The reaction temperature is 161°C, the reaction pressure is 0.6MPa, and the raw wax and oxygen are mixed in the gas-liquid mixer 5 and then enter the enhanced mixing reactor 6 with a residence time of 5min. The reaction products enter the product collection system 8 for separation and collection. The product meets the quality standards after testing, with an acid value of 38.60mg KOH / g and a ketone selectivity of >90%.

[0049] Example 2

[0050] The device is used to oxidize o-chlorotoluene to produce o-chlorobenzoic acid. 0.5 mm glass microspheres are filled into the rear two-thirds of the intensified mixing reactor 6, and 1.5 mm triangular spiral packing is filled into the front third of the intensified mixing reactor 6. 762.53 g of o-chlorotoluene and 30.49 g of the catalyst, cobalt acetate and manganese bromide, in a mass ratio of 3:1 are dissolved in 1497.20 g of acetic acid and mixed evenly. 0.73 g of NaBr is added as a promoter, and the mixture is fed into a microchannel reaction module through a feed system. Oxygen is introduced into each microchannel unit of the microchannel reaction module in three streams (ratio 1:2:1), with a total oxygen to o-chlorotoluene molar ratio of 2:1. The reaction temperature is set at 120°C, the reaction pressure at 0.5 MPa, and the residence time is approximately 4 minutes. The reaction products are separated and collected in a product collection system 8, and unreacted gases are discharged. Under these conditions, the o-chlorotoluene conversion rate can reach 95.53% and the selectivity is 98.76%.

[0051] Example 3

[0052] The device is used for the oxidation of ethylbenzene to prepare benzoic acid. 0.5 mm glass microbeads are filled into the last two-thirds of the intensified mixing reactor 6, and 1.5 mm triangular spiral fillers are filled into the first third of the intensified mixing reactor 6. Ethylbenzene is fed into each microchannel unit of the microchannel reaction module through the feeding system at a flow rate of 7 mL / min, and oxygen enters the microchannel reaction module in three streams (ratio 1:2:1), and the molar ratio of total oxygen to ethylbenzene is 3:1. The reaction temperature is set to 150 ° C, the reaction pressure is 0.8 MPa, the residence time is about 2 min, and the liquid hourly space velocity LHSV is 148.6 h -1 The reaction products enter the product collection system 8 for separation and collection, and the unreacted gas is discharged. Under these conditions, the ethylbenzene conversion rate can reach 88.27% and the selectivity can reach 95.32%.

[0053] Comparative Example 1

[0054] 182.50g of the wax feedstock was added to a 500mL autoclave and heated to melt at 160°C. Once the feedstock was completely melted and the temperature stabilized, oxygen was slowly injected, initially at 2L, followed by additional additions at a rate of 5-10mL / min. An oxygen concentration sensor was installed with an alarm threshold of 8% vol. The reaction was allowed to proceed for 8 hours. The product, upon testing, met quality standards. The product had an acid value of 24.78mgKOH / g, a ketone selectivity of approximately 83%, a slightly yellowish color, and an impurity content of approximately 0.2-0.3%.

[0055] By comparing Example 1 and Comparative Example 1, it can be seen that the product obtained based on the oxidation reaction process of the microchannel reaction device of the present invention has a higher acid value and ketone selectivity, indicating that the microchannel continuous reaction device of the present invention can more effectively promote the oxidation reaction of the raw wax in the direction of generating target products such as ketones in this reaction, thereby improving the quality of the product. Moreover, the reaction time of Comparative Example 1 is 8h, while the residence time of the raw material in the microchannel reaction module in Example 1 is only 5min, which completes the reaction and obtains a qualified product. This fully demonstrates the high efficiency of the microchannel continuous reaction device of the present invention, greatly shortens the reaction time, and improves production efficiency.

[0056] Comparative Example 2

[0057] 439g of o-chlorotoluene and 18.2g of the catalyst (cobalt acetate and manganese bromide in a 3:1 mass ratio) were dissolved in 928g of acetic acid and mixed thoroughly. 0.34g of NaBr was added as a promoter. The mixture was placed in a 1L autoclave and oxygen was injected at an initial oxygen pressure of 0.3MPa. The temperature was slowly raised to 120°C, with a reaction rate of 5°C / min from 30°C to 100°C and 1°C / min from 100°C to 120°C for approximately 3.2 hours. Under these conditions, the o-chlorotoluene conversion was 74.13% and the selectivity was 85.82%.

[0058] By contrast of Example 2 and Comparative Example 2, under the conditions of Comparative Example 2, o-chlorotoluene conversion is 74.13%, selectivity 85.82%.And in Example 2, o-chlorotoluene conversion can reach 95.53%, selectivity 98.76%.This shows that the microchannel continuous reaction device of Example 2 can significantly improve the conversion rate and the selectivity of reaction, effectively reduces the generation of side reaction, improves the productive rate and purity of target product.In addition, the reaction mass of Comparative Example 2 is reduced, but its material conversion is still lower than the conversion rate of Example 2. Although this explanation Comparative Example 2 material is few, its reaction condition control precision is still not as good as microchannel continuous reaction device of the present invention, and its safety risk is still higher than microchannel continuous reaction device of the present invention.Microchannel continuous reaction device of the present invention can still control with more efficient, more accurate reaction condition under the conditions that reaction mass is more, realizes higher conversion rate and selectivity, shows better reaction effect.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A microchannel continuous reaction device for gas-liquid oxidation reaction, characterized in that: It includes a feeding system, a microchannel reaction module, a temperature control system, a product collection system and a control and regulation system; The feeding system transports gaseous raw materials and liquid raw materials into the microchannel reaction module; The microchannel reaction module includes three or more microchannel units connected in series, each microchannel unit includes multiple gas-liquid mixers and multiple enhanced mixing reactors, the enhanced mixing reactor is a cylindrical tube structure, the interior of which is filled with a two-stage structure of triangular spiral filler and mixed reinforcement material; adjacent enhanced mixing reactors are connected by a gas-liquid mixer, and each gas-liquid mixer is respectively connected to a gas branch flow path; The temperature control system is used to accurately control the reaction temperature; The product collection system is used to separate and collect reaction products; The control and regulation system is used to monitor and regulate reaction conditions in real time.

2. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1, characterized in that: The feeding system includes a preheater and a feeding pump connected by a pipeline.

3. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1, characterized in that: The gas-liquid mixer is a venturi tube structure, which includes an inlet section, a contraction section, a throat section and a diffusion section.

4. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1, characterized in that: The gas-liquid mixer is provided with an air inlet and a liquid inlet.

5. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1, characterized in that: The interior of the enhanced mixing reactor is filled with 1.5-2 mm triangular spiral fillers and mixed reinforcement materials, and the mixed reinforcement materials are 0.1-1.0 mm catalysts and / or glass microbeads.

6. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1, characterized in that: A bend pipe is further connected between two adjacent enhanced mixing reactors of each microchannel unit to form a microchannel unit with a serpentine structure.

7. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1 or 6, characterized in that: A heat-conducting structure is provided on the outside of each microchannel unit. The heat-conducting structure is formed by pressing two heat-conducting plates together. A mixing reactor placement position is provided in the heat-conducting structure, and the enhanced mixing reactor is placed in the mixing reactor placement position.

8. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1, characterized in that: The temperature control system includes an integrated jacket, a multifunctional all-in-one machine and a temperature sensor; the integrated jacket is connected to the multifunctional all-in-one machine, the multifunctional all-in-one machine flows a medium into the integrated jacket, and the integrated jacket uses the medium flow to heat or cool the microchannel unit; the temperature sensor feeds back a temperature signal, the control and regulation system receives the temperature signal, analyzes it, and then sends a temperature adjustment instruction to the multifunctional all-in-one machine.

9. The microchannel continuous reaction device for gas-liquid oxidation reaction according to claim 1, characterized in that: The control and regulation system includes a flow controller, a pressure sensor and an automatic control unit.

10. An application method of a microchannel continuous reaction device for gas-liquid oxidation reaction, characterized in that: The application method is implemented by the microchannel continuous reaction device described in any one of claims 1 to 9, and includes the following steps: introducing gas and liquid raw materials through a feeding system, wherein the gas enters the microchannel unit in sections through a gas-liquid mixer, the gas and liquid phases are evenly distributed and efficiently mixed and reacted in the microchannel reaction module, and the reaction products enter the product collection system for separation and collection; during the reaction process, the reaction temperature is precisely controlled by a temperature control system, and the reaction conditions are monitored and adjusted in real time by a control and regulation system.

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