Constant pressure delivery unit, high temperature and high pressure continuous reaction system

Abstract

This utility model discloses a constant pressure conveying unit and a high-temperature, high-pressure continuous reaction system. The high-temperature, high-pressure continuous reaction system includes a continuous feeding unit, a premixing and preheating unit, a constant pressure conveying unit, a continuous micro-accumulation reaction unit, a heat exchange unit, and a product collection unit. The premixing and preheating unit receives raw materials and forms a mixed reaction mixture. The constant pressure conveying unit, heat exchange unit, and continuous micro-accumulation reaction unit are sequentially connected to form a first passage, where the constant pressure conveying unit transports the mixed reaction mixture to the heat exchange unit for heat exchange, and then into the continuous micro-accumulation reaction unit to generate a mixed reaction product. The continuous micro-accumulation reaction unit, heat exchange unit, and product collection unit are sequentially connected to form a second passage, where the heat exchange unit heats the mixed reaction product, and then the product collection unit collects the product. This reaction system operates in a completely closed system, supports continuous feeding and discharging, simplifies the process flow, improves production efficiency, and is suitable for various high-temperature, high-pressure continuous reactions.

Description

Technical Field

[0001] This utility model relates to the field of continuous flow reaction equipment technology, and in particular to a constant pressure conveying unit and a high temperature and high pressure continuous reaction system. Background Technology

[0002] In the processes of traditional Chinese medicine decoction, plant extraction, biochemical catalysis and synthesis, and fermentation, high-temperature and high-pressure reactions involving liquid-solid (heterogeneous) and liquid-liquid (homogeneous) reactions are frequently involved. In these cases, high-pressure reactors are typically used for batch operation. However, batch operation has several significant drawbacks, such as frequent cleaning, uncontrollable reaction conditions leading to poor product stability, low safety, high operational intensity, and high initial equipment investment costs. Batch operation, also known as production batch operation, typically requires thorough cleaning via manholes or handholes after the reaction, especially in cases involving solid-liquid heterogeneous reactions. Unreacted solid substrates or catalyst residues also need to be removed. After cleaning, fasteners and high-pressure seals must be reinforced and pressure tested. This series of processes is not only labor-intensive and time-consuming but also relatively inefficient.

[0003] Because high-pressure reactors cannot be fed under pressure, for two or more materials requiring delayed addition, the feeding manhole or flange can only be opened after the reactor has completely returned to atmospheric pressure and cooled to room temperature before the materials can be added dropwise. This method not only prolongs the production cycle but also increases energy consumption. This is particularly problematic for certain biochemical production processes, where temperature and pressure adjustments during high-pressure reactions are unsuitable, or where delayed or intermittent feeding is necessary. Utility Model Content

[0004] The main purpose of this invention is to provide a constant pressure conveying unit and a high temperature and high pressure continuous reaction system, thereby overcoming the shortcomings of the prior art.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0006] The first aspect of this utility model provides a constant pressure conveying unit, including a conveyor, a main inlet pipe, a main outlet pipe, multiple branch pipes, and a pressure regulator. The inlet of the conveyor is connected to the main inlet pipe, the multiple branch pipes are arranged in parallel and are all connected to the main inlet pipe, the outlet of the conveyor is connected to the pressure regulator via the main outlet pipe, the main inlet pipe is used to receive a first material, the branch pipes are used to receive a second material and convey it to the main inlet pipe, and the conveyor is used to output the first material and the second material from the main outlet pipe through the pressure regulator.

[0007] The concepts of primary and secondary materials here are used to distinguish materials added from different sources. In practice, the specific types and properties of primary and secondary materials will be determined based on the actual application scenario. Different secondary materials can be added to each branch pipe as needed.

[0008] In some more specific embodiments, a solid-liquid aperture check ball is provided at the inlet of the conveyor to prevent the first material and the second material from flowing back towards the inlet of the conveyor. Preferably, the constant pressure conveying unit further includes a high-level feeding tank and a material mixing vessel. The material mixing vessel is used to contain the first material, and the high-level feeding tank is used to contain the second material. The branch pipe is connected to the high-level feeding tank, and the main inlet pipe is connected to the material mixing vessel. Preferably, the constant pressure conveying unit further includes a flow regulating mechanism. The conveyor is connected to the flow regulating mechanism, which is used to regulate the conveying flow rate. Preferably, the constant pressure conveying unit further includes a pressure display instrument. The pressure stabilizer is connected to the pressure display instrument, which is used to display pressure information.

[0009] The second aspect of this utility model provides a high-temperature and high-pressure continuous reaction system, including a continuous feeding unit, a premixing and preheating unit, a constant-pressure conveying unit, a continuous micro-accumulation reaction unit, a heat exchange unit, and a product collection unit. The premixing and preheating unit is connected to the continuous feeding unit and is used to receive the reaction raw materials and fully mix and preheat them to form a mixed reaction raw material. The constant-pressure conveying unit, the heat exchange unit, and the continuous micro-accumulation reaction unit are connected in sequence to form a first passage for the flow of the mixed reaction raw material. The constant-pressure conveying unit is used to convey the mixed reaction raw material to the heat exchange unit for a first heat exchange treatment and then enter the continuous micro-accumulation reaction unit for reaction to generate a mixed reaction product. The continuous micro-accumulation reaction unit, the heat exchange unit, and the product collection unit are connected in sequence to form a second passage for the flow of the mixed reaction product. The heat exchange unit performs a second heat exchange treatment on the mixed reaction product and then enters the product collection unit to obtain the target product.

[0010] In some more specific solutions, the continuous feeding unit includes a hopper with a powder outlet at the bottom. The powder outlet is connected to a premixing and preheating unit. A timed and quantitative conveyor is provided between the powder outlet and the premixing and preheating unit. The timed and quantitative conveyor is used to convey the reaction raw materials to the premixing and preheating unit at preset time intervals and preset amounts.

[0011] Preferably, the continuous feeding unit further includes a timing meter, which is connected in conjunction with the timing and metering conveyor to record and monitor the conveying time and quantity of the reaction raw materials.

[0012] In some more specific embodiments, the premixing and preheating unit includes a premixing container and a preheating container connected in sequence. The premixing container is connected to the continuous feeding unit, and the preheating container is connected to the constant pressure conveying unit. The premixing container is provided with a raw material inlet and an vent. The raw material inlet is connected to the continuous feeding unit, and the vent is used to clean the premixing container. The preheating container includes an inner partition and an outer partition. The inner partition is provided with a preheating mechanism for heating the reaction raw materials inside the preheating container, and the outer partition is used for heat preservation.

[0013] Preferably, both the premix container and the preheating container are equipped with a stirring device.

[0014] Preferably, the preheating container is also equipped with a liquid level display and a temperature display.

[0015] Preferably, the bottom of the premixed container and / or preheated container is also provided with an automatic metering display.

[0016] In some more specific embodiments, the heat exchange unit includes a low-pressure heat exchanger, an atmospheric pressure heat exchanger, and a room temperature heat exchanger. The low-pressure heat exchanger includes a first heat exchange mechanism and a second heat exchange mechanism. The inlet of the first heat exchange mechanism is connected to the outlet of the constant pressure conveying unit, the outlet of the first heat exchange mechanism is connected to the inlet of the continuous micro-accumulation reaction unit, the outlet of the continuous micro-accumulation reaction unit is connected to the inlet of the second heat exchange mechanism, the outlet of the second heat exchange mechanism is connected to the inlet of the atmospheric pressure heat exchanger, the outlet of the atmospheric pressure heat exchanger is connected to the inlet of the room temperature heat exchanger, and the outlet of the room temperature heat exchanger is connected to the product collection unit.

[0017] Preferably, the top of the low-pressure heat exchanger is equipped with a pressure display and a temperature display.

[0018] Preferably, a cooler is provided on one side of the atmospheric pressure heat exchanger.

[0019] Preferably, a pressure regulating mechanism is provided at the outlet of the ambient temperature heat exchanger.

[0020] In some more specific embodiments, the continuous micro-reaction unit includes an insulated chamber, a micro-reaction tube, and a heating mechanism. The micro-reaction tube is disposed in the insulated chamber, and the heating mechanism is used to heat the micro-reaction tube. The micro-reaction tube is provided with heat-absorbing fins, which are threaded and wound around the micro-reaction tube.

[0021] Preferably, the micro-electrode reaction tubes are multiple tubes connected in series, with the inlet of the first micro-electrode in the series connected to the heat exchange unit and the outlet of the last micro-electrode in the series connected to the heat exchange unit.

[0022] Preferably, temperature displays are provided on both the inlet and outlet sides of the micro-electrochemical reaction tube.

[0023] Furthermore, the multiple micro-reaction tubes connected in series are arranged in a linear, vertical layer, and the distance between adjacent micro-reaction tubes is 1-2 times the diameter of the heat-absorbing fins.

[0024] Preferably, the diameter of the heat-absorbing fins is 1-2 times the diameter of the micro-accumulation reaction tube.

[0025] Preferably, the total length of the multiple micro-reaction tubes is 10-1000 meters.

[0026] Preferably, the total length of the heat-absorbing fins is 10-1000 meters. Preferably, the thickness of the heat-absorbing fins is 0.1-2.5 millimeters.

[0027] Preferably, the inner diameter of the micro-accumulation reaction tube is 1-400 mm, the wall thickness is 1.5-8 mm, and the thermal conductivity of the tube wall material is 12.3-171 W / mK.

[0028] Furthermore, the heat-insulating chamber is formed by an upper end cover, an upper box body, a lower box body, and a lower end cover. The upper end cover, the lower box body, and the lower end cover all have heat-insulating layers. A box body heat-insulating cover is provided outside the upper box body. The micro-accumulation reaction tube is located inside the upper box body. The heating mechanism is located on one side of the upper box body.

[0029] Preferably, the heating mechanism includes an electric heater and a heat exchange fan, wherein the heat exchange fan is connected to the heat-insulating chamber via a ventilation duct.

[0030] Preferably, a temperature display is installed at the connection between the ventilation duct and the upper housing to monitor the temperature of the insulated chamber.

[0031] Preferably, temperature sensors are provided on both sides of the upper housing.

[0032] In some more specific solutions, the product collection unit includes a product collection container and a solid-liquid separator. The product collection container is connected to a heat exchange unit, and the solid-liquid separator is connected to the product collection container. The solid-liquid separator has a solid residue outlet at its bottom.

[0033] Preferably, a pressure regulator is provided between the product collection container and the heat exchange unit to regulate the conveying efficiency; preferably, a flow meter and a level gauge are installed on the product collection container.

[0034] Compared with the prior art, the advantages of this utility model include at least the following:

[0035] First, the high-temperature, high-pressure continuous reaction system provided by this utility model connects a continuous feeding unit and a premixing and preheating unit. A timed and quantitative conveyor is installed between the continuous feeding unit and the premixing and preheating unit, accurately delivering the reaction raw materials to the premixing and preheating unit according to a pre-set time interval and quantity, thereby ensuring the continuity and stability of the entire reaction process and effectively overcoming many drawbacks of traditional batch reactor operations. This method simplifies the operating process under high-temperature and high-pressure environments in the biochemical field, as well as the complexity of delayed or uninterrupted feeding. The application of this technology significantly improves production efficiency, making the entire production process more efficient, safe, and controllable.

[0036] Secondly, in the high-temperature and high-pressure continuous reaction system provided by this utility model, the premixing and preheating unit includes a premixing container and a preheating container connected in sequence. In the premixing container, the materials are first mixed to ensure the homogeneity of the reactants, thereby improving the efficiency and consistency of the reaction. Subsequently, the materials are transferred to the preheating container and heated to the required high-temperature and high-pressure state. Through multi-stage premixing and heat exchange treatment of the materials, not only is the utilization rate of thermal energy improved, but the energy efficiency of the entire system is also significantly improved, with a thermal utilization rate of greater than or equal to 98%, which is more than 65% higher than that of existing batch reactors and saves more than 33% of energy.

[0037] Third, the high-temperature and high-pressure continuous reaction system provided by this utility model changes the intermittent operation mode of the existing batch reaction, eliminates the step of stopping the reactor in the middle of the reaction to reduce pressure and temperature to add various materials, shortens the operation time, compresses the process flow, and improves product efficiency.

[0038] Fourth, the high-temperature and high-pressure continuous reaction system provided by this utility model allows for continuous feeding and discharging under completely sealed conditions. All pressure sealing points do not need to be disassembled (except for maintenance), which greatly improves operational safety and overcomes the shortcomings of existing batch reactors where frequent disassembly and assembly of pressure sealing components can lead to leakage of pressure or high-temperature materials due to slight negligence in manual operation, endangering safety.

[0039] Fifth, the high-temperature and high-pressure continuous reaction system provided by this utility model solves the problem of solid-liquid material pipeline reaction in biochemical operations by adjusting the diameter of the metal check ball sucked in by the conveyor in the constant pressure conveying unit. It can make the solid content flow range of solid and liquid materials ≤9.5%, filling the gap in the continuous flow reaction of solid and liquid materials (heterogeneous). Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of a high-temperature and high-pressure continuous reaction system in a typical embodiment of this utility model;

[0041] Figure 2 This is a schematic diagram of the structure of a continuous feeding unit in a typical embodiment of this utility model;

[0042] Figure 3 This is a schematic diagram of the structure of a premixed preheating unit in a typical embodiment of this utility model;

[0043] Figure 4 This is a schematic diagram of the structure of a constant pressure conveying unit in a typical embodiment of this utility model;

[0044] Figure 5 This is a schematic diagram of the structure of a heat exchange unit in a typical embodiment of this utility model;

[0045] Figure 6 This is a schematic diagram of the structure of a continuous micro-product reaction unit in a typical embodiment of this utility model;

[0046] Figure 7 A schematic diagram of the structure of a product collection unit in a typical embodiment of this utility model.

[0047] 1. Continuous feeding unit; 2. Premixing and preheating unit; 3. Constant pressure conveying unit; 4. Heat exchange unit; 5. Continuous micro-accumulation reaction unit; 6. Product collection unit; 11. Solid powder silo; 12. Timed and quantitative conveyor; 21. Premixing container; 22. Preheating container; 23. Solid-liquid material conveying pump; 212. Raw material inlet; 211. Drain port; 221. Liquid level indicator; 222. Temperature indicator; 31. Conveyor; 32. Main inlet pipe; 33. Branch pipe; 34. Pressure stabilizer; 3 5. High-level feeding tank; 36. Material mixing vessel; 41. Low-pressure heat exchanger; 42. Atmospheric pressure heat exchanger; 43. Ambient temperature heat exchanger; 44. Pressure display instrument; 45. Temperature display instrument; 51. Micro-accumulation reaction tube; 52. Heat-absorbing fins; 53. Upper end cover; 54. Upper chamber; 55. Lower chamber; 56. Lower end cover; 57. Chamber insulation cover; 58. Electric heater; 61. Product collection container; 62. Solid-liquid separator; 63. Pressure regulator; 64. Solid-liquid material conveying pump; 621. Solid residue outlet. Detailed Implementation

[0048] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0049] Please see Figure 1 This utility model relates to a high-temperature, high-pressure continuous reaction system comprising: a continuous feeding unit 1, a premixing and preheating unit 2, a constant-pressure conveying unit 3, a heat exchange unit 4, a continuous micro-accumulation reaction unit 5, and a product collection unit 6. The reaction raw materials are fed into the premixing and preheating unit 2 via the continuous feeding unit 1, where they are thoroughly mixed and preheated. The resulting mixed reaction raw materials are then conveyed to the heat exchange unit 4 via the constant-pressure conveying unit 3, and subsequently enter the continuous micro-accumulation reaction unit 5 for reaction. The resulting mixed reaction product flows through the heat exchange unit 4 and then into the product collection unit 6, where it undergoes post-processing to obtain the target product. It is worth noting that the reaction raw materials can be diverse, including but not limited to solid raw materials and liquid raw materials. However, to ensure the smooth progress of the reaction, the mixed reaction raw materials should be in a fluid state before entering the continuous micro-accumulation reaction unit 5, thus ensuring the uniformity of the raw materials and the reaction efficiency during the reaction process.

[0050] In the high-temperature and high-pressure continuous reaction system of this invention, the continuous feeding unit 1 is responsible for continuously feeding the reactants, ensuring a stable supply of raw materials throughout the reaction process. The premixing and preheating unit 2 thoroughly mixes and preheats the incoming reactants to achieve optimal reaction conditions. The constant-pressure conveying unit 3 conveys the premixed and preheated reactants to the heat exchange unit 4 under constant pressure, ensuring the continuity and stability of the reaction process. The heat exchange unit 4 is responsible for regulating the temperature of the reactants to ensure the reaction proceeds at a suitable temperature. The continuous micro-reaction unit 5 is the core of the entire system, responsible for completing the chemical reaction process of the reactants and converting the mixed reactants into the desired mixed reaction products. Finally, the product collection unit 6 collects the mixed reaction products after the reaction and, through post-processing steps such as separation and purification, ultimately obtains the target product. The following sections describe each part in detail:

[0051] Please see Figure 2The continuous feeding unit 1 includes a solid powder silo 11 and a timed and metered conveyor 12. The bottom of the solid powder silo 11 has a powder outlet for discharging solid powder A. Subsequently, solid powder A is fed into the premixing and preheating unit 2 via the timed and metered conveyor 12 at predetermined time intervals and in precise quantities. In the premixing and preheating unit 2, solid powder A is mixed with other components and preheated to prepare for subsequent production processes. Furthermore, an automatic digital timing and metering instrument (not shown in the figure) is installed near the timed and metered conveyor 12. A solid powder conveyor (not shown in the figure) can also be installed at the front end of the continuous feeding unit 1, with the solid powder silo 11 positioned below it.

[0052] Please see Figure 3 The premixing and preheating unit 2 includes a premixing container 21, a preheating container 22, a solid-liquid material conveying pump 23, and material pipelines. Specifically, the upper end of the premixing container 21 is provided with a solid and / or liquid raw material inlet 212, which is directly connected to the timed and quantitative conveyor 12. Through the timed and quantitative conveyor 12, the solid and / or liquid raw material inlet 212 can be effectively connected to the solid powder silo 11, ensuring that solid powder A is conveyed to the premixing container 21 and mixed with liquid material B in the premixing container 21. At the same time, the upper end of the premixing container 21 is also provided with an empty port 211 for emptying the material in the container when needed. A stirring paddle is installed inside the premixing container 21 to ensure that solid powder A and liquid material B are uniformly mixed. To improve the stirring efficiency, each stirring paddle is provided with two or more blades along the axial direction.

[0053] The premixing container 21 and the preheating container 22 are interconnected via a solid-liquid material transfer pump 23 and material pipelines, ensuring that the premixed material is transferred from the premixing container 21 to the preheating container 22 for heating. The preheating container 22 has a double-layered structure. The inner layer can be equipped with an electric heating device or a hydrothermal mechanism to heat the material inside the container; the outer layer serves as an insulation layer to maintain the temperature inside the container and prevent heat loss. Both the premixing container 21 and the preheating container 22 are equipped with stirring paddles to ensure uniform mixing of the material within the container. To improve stirring efficiency, each stirring paddle has two or more blades arranged axially. Furthermore, the top of the preheating container 22 is equipped with a level indicator 221 for real-time monitoring of the liquid level inside the container; a temperature indicator 222 is located on the side to monitor the temperature of the material at any time. The bottom of the preheating container 22 is also equipped with an automatic metering indicator (not shown in the figure) for accurately measuring and displaying the amount of material.

[0054] Please see Figure 4The preheating container 22 is also closely connected to the constant pressure conveying unit 3 to ensure that the premixed and preheated solid-liquid material can be conveyed to the constant pressure conveying unit 3. The constant pressure conveying unit 3 includes a conveyor 31, a main inlet pipe 32, multiple branch pipes 33, a pressure stabilizer 34, a high-level feeding tank 35, a material mixing vessel 36, and a main outlet pipe. Specifically, the preheating container 22 is connected to the material mixing vessel 36. The premixed and preheated solid-liquid material is conveyed to the material mixing vessel 36. The main inlet pipe 32 connects the conveyor 31 and the material mixing vessel 36, ensuring that the material can flow out of the material mixing vessel 36 and be conveyed to the inlet of the conveyor 31 through the main inlet pipe 32. Multiple branch pipes 33 are arranged in parallel and are all connected to the main inlet pipe 32. At the same time, these branch pipes 33 are also connected to the high-level feeding tank 35. The function of the high-level feeding tank 35 is to add a small amount of additives dropwise and does not participate in the mixing process of the material mixing vessel 36. The additive flows out from the high-level feed tank 35 and is conveyed to the inlet of the conveyor 31 via the branch pipe 33 and the main inlet pipe 32. The outlet of the conveyor 31 is connected to the heat exchange unit 4 via the main outlet pipe. The main outlet pipe is also connected to the pressure regulator 34, which in turn is connected to a pressure display and / or a flow regulator (not shown in the figure). In summary, the solid-liquid mixture in the material mixing vessel 36 and the additive in the high-level feed tank 35 are fed into the heat exchange unit 4 via the conveyor 31.

[0055] Furthermore, the conveyor 31 can employ a solid-liquid material conveying pump. To further optimize the conveying process, a solid-liquid orifice check valve metal ball is also installed at the inlet of the conveyor 31. Under the action of the piston in the conveyor 31, this metal ball prevents the backflow of high-pressure solid-liquid fluid on the one hand, and generates high pressure in the sucked-in solid-liquid mixture on the other hand, thereby completing the process conveying. Specifically, when the solid-liquid mixture is sucked in under the action of the piston in the conveyor 31, the metal ball is pushed vertically upward, and the liquid is simultaneously fed into the pipeline. After the ball rises to a certain height, it falls freely due to gravity, thereby closing the feed of the solid-liquid mixture. The resulting high pressure is maintained, propelling the liquid in the pipeline. At this time, the conveyor piston continues to work, repeating the above process. The diameter of the metal ball is designed according to the specific gravity of the solid-liquid mixture, generally between 20 mm and 100 mm. By utilizing the diameter of the solid-liquid orifice check valve metal ball, the problem of solid-liquid material pipeline reaction in biochemical operations is effectively solved. The solid content of the solid-liquid material flows within a range not exceeding 9.5%, filling the gap in continuous flow reactions of solid-liquid materials (heterogeneous phases). Furthermore, the conveyor can be connected to manual or automatic flow control mechanisms, such as manual or automatic flow control handles or electric control discs (not shown in the figure).

[0056] In this design, a multi-branched parallel feeding design is adopted at the inlet of the conveyor 31, i.e., multiple branched pipes are set in parallel, which allows for the convenient addition of other required reaction raw materials. These reaction raw materials can be solid or liquid, thereby achieving the mixed feeding of two or more materials. In addition, the separate feeding through the branched pipes allows for flexible adjustment after setting to adapt to different reaction requirements.

[0057] Please see Figure 5 This demonstrates the detailed process of heat exchange between the mixed reaction raw materials and mixed reaction products in heat exchange unit 4. Heat exchange unit 4 includes a low-pressure heat exchanger 41 (with an operating pressure not exceeding 0.2 MPa), an atmospheric pressure heat exchanger 42, and an ambient temperature heat exchanger 43.

[0058] The low-pressure heat exchanger 41 specifically includes a first spiral tube, a second spiral tube, and a third spiral tube and a fourth spiral tube connected in series. The atmospheric pressure heat exchanger 42 includes a fifth spiral tube and a sixth spiral tube connected in series. The ambient temperature heat exchanger 43 includes a seventh spiral tube and an eighth spiral tube connected in series.

[0059] Specifically, the inlet of the first helical tube is connected to the outlet of the conveyor 31, and the outlet of the first helical tube is connected to the inlet of the second helical tube. The outlet of the second helical tube is further connected to the inlet pipe of the continuous micro-accumulation reaction unit 5. The solid-liquid mixture output from the conveyor 31 first enters the first helical tube, passes through the second helical tube, and is finally output to the inlet of the continuous micro-accumulation reaction unit 5.

[0060] The outlet of the continuous micro-accumulation reaction unit 5 is connected to the inlet of the third spiral tube, which in turn is connected to the inlet of the fourth spiral tube. The outlet of the fourth spiral tube is connected to the inlet of the fifth spiral tube, which is connected to the inlet of the sixth spiral tube, which is connected to the inlet of the seventh spiral tube, which is connected to the inlet of the eighth spiral tube, and finally, the outlet of the eighth spiral tube is connected to the product collection unit 6. The entire conveying process is as follows: after the solid-liquid mixture reacts in the continuous micro-accumulation reaction unit 5, it first enters the third spiral tube, then exits through the fourth spiral tube for low-pressure cooling. Next, the material enters the fifth spiral tube, then flows into the sixth spiral tube for atmospheric pressure cooling. After that, the material flows into the seventh spiral tube, then into the eighth spiral tube for room temperature cooling, and finally is conveyed to the product collection unit 6. Throughout the entire conveying process, the solid-liquid fluid is powered by the constant pressure conveying unit 3. In the above process flow, after the solid and liquid materials undergo a qualitative change in the continuous micro-accumulation reaction unit 5, they are cooled step by step through the low-pressure heat exchanger 41, the atmospheric pressure heat exchanger 42 and the ambient temperature heat exchanger 43. This process not only plays an auxiliary role in the reaction, but also absorbs and stores heat, thereby improving the overall system capacity.

[0061] A cooler is specially installed on one side of the atmospheric pressure heat exchanger 42 to further control the temperature during the reaction process. In addition, a pressure display 44 and a temperature display 45 are equipped on the top of the low-pressure heat exchanger 41 to monitor the operating status of the heat exchanger in real time. To better control the outlet pressure of the material, a pressure regulating mechanism is installed at the outlet of the fourth spiral tube assembly. This can be a manual or electric pressure regulator, ensuring that the material can be smoothly discharged from the heat exchanger.

[0062] Please see Figure 6 The continuous micro-reaction unit 5 includes an insulated chamber, multiple micro-reaction tubes 51, and a heating mechanism. The insulated chamber consists of an upper cover 53, an upper housing 54, a lower housing 55, and a lower cover 56, and is equipped with an insulated cover 57. The micro-reaction tubes 51 are connected in series and housed inside the upper housing 54, which is completely enclosed by the insulated cover 57. The outlet of the second spiral tube is further connected to the inlet pipe of the micro-reaction tube 51. The outlet pipe of the micro-reaction tube 51 is connected to the inlet of the third spiral tube. The upper cover 53, lower housing 55, and lower cover 56 are all designed with insulation layers to reduce heat loss. The heating mechanism provides the necessary heat to the micro-reaction tubes 51, and its heating method can be electric heating, thermal oil heating, natural gas heating, or steam heating, among other forms.

[0063] The micro-phase reaction tube 51 is equipped with heat-absorbing fins 52, which help improve the heat absorption efficiency of the micro-phase reaction tube 51. The heat-absorbing fins 52 are designed in a spiral shape and tightly wound around the outer wall of the micro-phase reaction tube 51. The diameter of the heat-absorbing fins 52 is approximately 1 to 2 times the diameter of the micro-phase reaction tube 51. Multiple micro-phase reaction tubes 51 are arranged linearly, alternating between upper and lower layers, with the distance between adjacent micro-phase reaction tubes 51 being approximately 1 to 2 times the diameter of the heat-absorbing fins 52 to ensure efficient heat exchange. The inner diameter of the micro-phase reaction tube 51 ranges from 1 to 400 mm, the wall thickness is 1.5 to 8 mm, and the thermal conductivity of the tube wall material is between 12.3 and 171 W / mK. The total length of multiple micro-phase reaction tubes 51 can reach 10 to 1000 meters. The thickness of the heat-absorbing fins 52 ranges from 0.1 to 2.5 mm, and the total length also ranges from 10 to 1000 meters to adapt to different heat exchange requirements. Spiral heat-absorbing fins are wound around the micro-accumulation reaction tube, enabling the heat absorption in the continuous micro-accumulation reaction of the material to reach over 99%. Furthermore, due to the high heat storage effect of these heat-absorbing fins, the reaction of the flowing material is stabilized, allowing for continuous micro-accumulation of the material reaction.

[0064] By employing the aforementioned spirally wound heat-absorbing fins 52, their high heat storage capacity allows the heat absorption efficiency of the material in the continuous micro-accumulation reaction to reach over 99%, thereby ensuring the smooth progress of the flowing material reaction and achieving the goal of continuous micro-accumulation. Temperature displays are also installed on both the inlet and outlet sides of the micro-accumulation reaction tube 51 to monitor temperature changes during the reaction process in real time.

[0065] A heating mechanism is provided on one side of the upper housing 54. The heating mechanism includes an electric heater 58 and a heat exchange fan (not shown in the figure). The heat exchange fan is connected to a sealed, insulated chamber via a ventilation duct, allowing hot air to form a self-closing circulation within the insulated chamber. The electric heater 58 can be a heating element. The temperature range of the heat exchange fan is 10 to 450°C, and the air circulation volume is 100 to 50,000 m³ / h. 3 / h. Utilizing self-closed hot air circulation heat exchange technology, the circulating temperature control within the continuous micro-accumulation reactor chamber becomes highly flexible. Due to the self-closed circulation heat transfer, no hot waste gas is emitted from the production site, ensuring a clean and safe production process. Furthermore, the electric heater 58 and heat exchange fan can be connected to a remote temperature control system for convenient remote control. Temperature displays can also be installed at the connection between the ventilation duct and the upper chamber 54 to ensure temperature monitoring of the entire system. Remote fixed-point temperature probes are also equipped on both sides of the upper chamber 54 for precise temperature monitoring.

[0066] Please see Figure 7 The product collection unit 6 includes a product collection container 61 and a solid-liquid separator 62. The material inlet of the product collection container 61 is directly connected to the outlet of the eighth spiral tube, ensuring that material can flow to the product collection container 61. A pressure regulator 63 is installed on the pipeline connecting the product collection container 61 and the eighth spiral tube to regulate the conveying efficiency. The material outlet of the product collection container 61 is connected to the solid-liquid separator 62 through a solid-liquid material conveying pump 64, ensuring that material is conveyed to the product collection container 62.

[0067] The solid-liquid separator 62 can operate continuously for 24 hours, responsible for solid-liquid separation. A solid residue outlet 621 is provided at the bottom of the separator 62 for easy discharge of the separated solid waste. Furthermore, to better monitor and control the material state within the product collection container 61, a flow meter and a level gauge (not shown in the figure) are installed on the product collection container 61. For mixed reaction products containing both solid and liquid phases, the solid content can be controlled to be 0.5wt%-1.5wt% after separation by the solid-liquid separator 62, thereby meeting specific process requirements.

[0068] Furthermore, the various components in this high-temperature and high-pressure continuous reaction system, especially those in contact with raw materials and reaction products, can be made of highly corrosion-resistant materials so that they can adapt to acidic and alkaline materials with pH values ​​between 2 and 11.

[0069] The high-temperature and high-pressure continuous reaction system provided in this typical embodiment allows for continuous feeding and discharging under completely closed conditions. On the one hand, it simplifies the high-temperature and high-pressure, delayed or uninterrupted feeding process in the biochemical field, eliminating the need for intermediate reactor shutdowns to depressurize and cool down to add other materials, shortening operation time, compressing the process flow, and greatly improving production efficiency. It also makes various process parameters in the production process easier to control and adjust, improving product benefits. On the other hand, all pressure sealing points do not need to be disassembled (except for maintenance), greatly improving operational safety. Moreover, through heat exchange of its own reaction heat, and by adopting multi-stage pre-exchange and heat exchange technology for material input, the heat utilization rate is ≥98%.

[0070] In application, this high-temperature, high-pressure continuous reaction system utilizes a continuous feeding unit to input the reactants. First, a premixing and preheating unit thoroughly mixes and preheats the reactants. Then, the resulting mixed reactants are conveyed to a heat exchange unit via a constant-pressure conveying unit, and subsequently fed into a continuous micro-accumulation reaction unit for continuous reaction. The pressure, flow rate, and temperature of this continuous reaction are ≤7 MPa, ≤1 T / h, and ≤300℃. The resulting mixed reaction product is then fed into the heat exchange unit and undergoes at least sufficient heat exchange with the mixed reactants before being fed into a product collection unit for post-processing to obtain the target product. This solution employs a combined feed conveying and discharge control technology, allowing for flexible setting of the pressure of the flowing material, making the operation of various complex biochemical processes simpler and more controllable.

[0071] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A constant pressure conveying unit, characterized in that, It includes at least a conveyor, a main inlet pipe, a main outlet pipe, multiple branch pipes, and a pressure regulator. The inlet of the conveyor is connected to the main inlet pipe. The multiple branch pipes are arranged in parallel and are all connected to the main inlet pipe. The outlet of the conveyor is connected to the pressure regulator via the main outlet pipe. The main inlet pipe is used to receive a first material. The branch pipes are used to receive a second material and convey it to the main inlet pipe. The conveyor is used to output the first material and the second material from the main outlet pipe through the pressure regulator.

2. The constant pressure conveying unit according to claim 1, characterized in that, A solid-liquid aperture check ball is installed at the inlet of the conveyor to prevent the first material and the second material from flowing back towards the inlet of the conveyor. And / or, the constant pressure conveying unit further includes an elevated feeding tank and a material mixing vessel, the material mixing vessel being used to contain a first material, the elevated feeding tank being used to contain a second material, the branch pipe being connected to the elevated feeding tank, and the main inlet pipe being connected to the material mixing vessel. And / or, the constant pressure conveying unit further includes a flow regulating mechanism, the conveyor being connected to the flow regulating mechanism, the flow regulating mechanism being used to regulate the conveying flow rate. And / or, the constant pressure delivery unit further includes a pressure display, the pressure regulator is connected to the pressure display, and the pressure display is used to display pressure information.

3. A high-temperature, high-pressure continuous reaction system, characterized in that, The system includes a continuous feeding unit, a premixing and preheating unit, a constant pressure conveying unit as described in claim 1 or 2, a continuous micro-accumulation reaction unit, a heat exchange unit, and a product collection unit. The premixing and preheating unit is connected to the continuous feeding unit and is used to receive the reaction raw materials and fully mix and preheat them to form a mixed reaction raw material. The constant pressure conveying unit, the heat exchange unit, and the continuous micro-accumulation reaction unit are connected in sequence to form a first passage for the flow of the mixed reaction raw material. The constant pressure conveying unit is used to convey the mixed reaction raw material to the heat exchange unit for a first heat exchange treatment and then enter the continuous micro-accumulation reaction unit for reaction to generate a mixed reaction product. The continuous micro-accumulation reaction unit, the heat exchange unit, and the product collection unit are connected in sequence to form a second passage for the flow of the mixed reaction product. The heat exchange unit is used to perform a second heat exchange treatment on the mixed reaction product and guide the mixed reaction product into the product collection unit to obtain the target product.

4. The high-temperature and high-pressure continuous reaction system according to claim 3, characterized in that, The continuous feeding unit includes a hopper with a powder outlet at its bottom. The powder outlet is connected to a premixing and preheating unit. A timed and metered conveyor is installed between the powder outlet and the premixing and preheating unit. The timed and metered conveyor is used to convey the reaction raw materials to the premixing and preheating unit at preset time intervals and in preset quantities. And / or, the continuous feeding unit further includes a timing meter, which is connected in conjunction with the timing and metering conveyor to record and monitor the conveying time and amount of the reaction raw materials.

5. The high-temperature and high-pressure continuous reaction system according to claim 3, characterized in that, The premixing and preheating unit includes a premixing container and a preheating container connected in sequence. The premixing container is connected to the continuous feeding unit, and the preheating container is connected to the constant pressure conveying unit. The premixing container is provided with a raw material inlet and an vent. The raw material inlet is connected to the continuous feeding unit, and the vent is used for cleaning the premixing container. The preheating container includes an inner partition and an outer partition. The inner partition is provided with a preheating mechanism for heating the reaction raw materials inside the preheating container, and the outer partition is used for heat preservation. And / or, both the premix container and the preheating container are equipped with a stirring device; And / or, the preheating container is also equipped with a liquid level display and a temperature display; And / or, the bottom of the premixed container and / or preheated container is also provided with an automatic metering display.

6. The high-temperature and high-pressure continuous reaction system according to claim 3, characterized in that, The heat exchange unit includes a low-pressure heat exchanger, an atmospheric pressure heat exchanger, and an ambient temperature heat exchanger. The low-pressure heat exchanger includes a first heat exchange mechanism and a second heat exchange mechanism. The inlet of the first heat exchange mechanism is connected to the outlet of the constant pressure conveying unit, and the outlet of the first heat exchange mechanism is connected to the inlet of the continuous micro-accumulation reaction unit. The outlet of the continuous micro-accumulation reaction unit is connected to the inlet of the second heat exchange mechanism, and the outlet of the second heat exchange mechanism is connected to the inlet of the atmospheric pressure heat exchanger. The outlet of the atmospheric pressure heat exchanger is connected to the inlet of the ambient temperature heat exchanger, and the outlet of the ambient temperature heat exchanger is connected to the product collection unit. And / or, a pressure display and a temperature display are provided on the top of the low-pressure heat exchanger. And / or, a cooler is provided on one side of the atmospheric pressure heat exchanger. And / or, a pressure regulating mechanism is provided at the outlet of the ambient temperature heat exchanger.

7. The high-temperature and high-pressure continuous reaction system according to claim 3, characterized in that, The continuous micro-reaction unit includes an insulated chamber, a micro-reaction tube, and a heating mechanism. The micro-reaction tube is disposed within the insulated chamber, and the heating mechanism is used to heat the micro-reaction tube. The micro-reaction tube is provided with heat-absorbing fins, which are threaded and wound around the micro-reaction tube. And / or, the micro-phase reaction tubes are multiple tubes arranged in series, with the inlet of the first micro-phase reaction tube connected to the heat exchange unit and the outlet of the last micro-phase reaction tube connected to the heat exchange unit. And / or, temperature displays are provided on both the inlet and outlet sides of the micro-electrochemical reaction tube.

8. The high-temperature and high-pressure continuous reaction system according to claim 7, characterized in that, The multiple micro-reaction tubes connected in series are arranged in a linear, vertical layer, and the distance between adjacent micro-reaction tubes is 1-2 times the diameter of the heat-absorbing fins. And / or, the diameter of the heat-absorbing fins is 1-2 times the diameter of the micro-accumulation reaction tube; And / or, the total length of the multiple micro-reaction tubes is 10-1000 meters; And / or, the total length of the heat-absorbing fins is 10-1000 meters; And / or, the thickness of the heat-absorbing fins is 0.1-2.5 mm; And / or, the inner diameter of the micro-electrochemical reaction tube is 1-400 mm, the wall thickness is 1.5-8 mm, and the thermal conductivity of the tube wall material is 12.3-171 W / mK.

9. The high-temperature and high-pressure continuous reaction system according to claim 7, characterized in that, The heat-insulating chamber is formed by an upper end cover, an upper box body, a lower box body, and a lower end cover. The upper end cover, the lower box body, and the lower end cover all have heat-insulating layers. An insulated box cover is provided outside the upper box body. The micro-accumulation reaction tube is located inside the upper box body. The heating mechanism is located on one side of the upper box body. And / or, the heating mechanism includes an electric heater and a heat exchange fan, the heat exchange fan being connected to the insulation chamber via a ventilation duct; And / or, a temperature display is installed at the connection between the ventilation duct and the upper housing to monitor the temperature of the insulation chamber; And / or, temperature probes are provided on both sides of the upper housing.

10. The high-temperature and high-pressure continuous reaction system according to claim 3, characterized in that, The product collection unit includes a product collection container and a solid-liquid separator. The product collection container is connected to a heat exchange unit, and the solid-liquid separator is connected to the product collection container. The solid-liquid separator has a solid residue outlet at its bottom. And / or, a pressure regulator is provided between the product collection container and the heat exchange unit to regulate the conveying efficiency; And / or, the product collection container is equipped with a flow meter and a level gauge.

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