Direct heating type ultra-high-temperature sterilization machine suitable for high-viscosity materials

Abstract

The invention discloses a direct heating type ultra-high-temperature sterilization machine suitable for high-viscosity materials, which comprises a material conveying unit, a preheating unit is arranged at the discharge end of the material conveying unit, a direct heating sterilization unit is arranged at the discharge end of the preheating unit, and an ultra-high-temperature sterilization unit is arranged at the discharge end of the direct heating sterilization unit. A flash tank is arranged on the side, away from the preheating unit, of the direct heating sterilization unit, an aging tank is arranged at the discharging end of the flash tank, a cooling unit is arranged at the discharging end of the aging tank, and a steam tank is arranged on the side, away from the aging tank, of the cooling unit; the problem of low heat transfer efficiency is solved through direct contact of high-temperature steam and materials, thorough sterilization is ensured, efficient and uniform sterilization is realized, the texture, flavor and storage stability of the high-viscosity materials can be remarkably improved through mutual cooperation of the flash tank and the aging tank, and the quality of the materials is improved; and the water heating system is arranged to provide media for the preheating unit and the cooling unit, so that reasonable utilization of energy is realized, and the overall energy-saving property is improved.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing technology, specifically to a direct-heating ultra-high temperature sterilizer suitable for high-viscosity materials. Background Technology

[0002] In the food and pharmaceutical industries, sterilization of high-viscosity materials is a crucial process for ensuring product safety and shelf life. Ultra-high temperature (UHT) sterilization technology is widely used because it can kill microorganisms in a short time while preserving the nutrients and flavor of materials to the greatest extent. However, high-viscosity materials have low heat transfer efficiency, and traditional direct-heating sterilization equipment suffers from uneven heating, easy material adhesion and scaling, and unstable material structure after sterilization, resulting in poor sterilization effect or decreased product quality. Therefore, we propose a direct-heating UHT sterilizer specifically designed for high-viscosity materials. Summary of the Invention

[0003] The purpose of this invention is to provide a direct-heating ultra-high temperature sterilizer suitable for high-viscosity materials, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a material conveying unit is included, a preheating unit is provided at the discharge end of the material conveying unit, a direct heating sterilization unit is provided at the discharge end of the preheating unit, a flash tank is provided on the side of the direct heating sterilization unit away from the preheating unit, an aging tank is provided at the discharge end of the flash tank, a cooling unit is provided at the discharge end of the aging tank, a steam tank is provided on the side of the cooling unit away from the aging tank, and a water heating system is provided on one side of the steam tank.

[0005] Preferably, the material conveying unit is a screw conveyor pump, and a first pipeline is provided between the material conveying unit and the preheating unit, with the two ends of the first pipeline respectively installed at the discharge end of the material conveying unit and the inlet end of the preheating unit. By adopting the above technical solution, the screw conveyor pump and the first pipeline are designed to work together to stably convey high-viscosity materials, providing a closed and uninterrupted conveying channel from the material conveying unit to the preheating unit, thus better adapting to the conveyed materials.

[0006] Preferably, a second pipeline is provided between the preheating unit and the direct heating sterilization unit, a first heat exchange chamber is provided inside the preheating unit, and a third pipeline and a fourth pipeline are respectively provided between the preheating unit and the water heating system. The two ends of the third pipeline are respectively installed corresponding to the inlet of the first heat exchange chamber in the preheating unit and the first outlet of the water heating system, and the two ends of the fourth pipeline are respectively installed corresponding to the outlet of the first heat exchange chamber in the preheating unit and the return water port of the water heating system. By adopting the above technical solutions, the second pipeline can achieve continuous and stable material transport from preheating to direct heating and sterilization, ensuring the continuity of the process flow and avoiding fluctuations in sterilization effect caused by interruption of material transport or uneven flow rate. The third pipeline can provide a stable and controllable heat source for the preheating unit. Through heat exchange between the heat medium and the material, the preheating temperature of high-viscosity materials can be precisely controlled to ensure that the material reaches the optimal preheating state before entering the direct heating and sterilization unit. The fourth pipeline can cooperate with the third pipeline to build a heat medium circulation loop between the preheating unit and the water heating system. This allows the heat medium that has completed heat exchange and temperature reduction in the preheating unit to flow back to the water heating system for reheating, realizing the recycling of the heat medium, greatly improving energy utilization, and reducing system energy consumption.

[0007] Preferably, a fifth pipeline is provided between the direct heating sterilization unit and the flash tank, and the two ends of the fifth pipeline are respectively installed at the discharge end of the direct heating sterilization unit and the inlet of the flash tank. A first control valve is provided on the fifth pipeline. By adopting the above technical solutions, the fifth pipeline can be adapted to high temperature and high pressure environments, ensuring system safety and enabling rapid and non-residual conveying of ultra-high temperature materials, avoiding quality deterioration. The first control valve can effectively block the reverse influence of the low pressure environment of the flash tank on the direct heating sterilization unit, preventing the low pressure in the flash tank from causing the material to flow back to the direct heating sterilization unit, preventing the pressure of the direct heating sterilization unit from dropping suddenly and damaging the ultra-high temperature sterilization conditions, and at the same time preventing the flash tank from increasing the extra load due to the backflow of materials, ensuring the independent and stable operation of the direct heating sterilization unit and the flash tank.

[0008] Preferably, a sixth pipeline is provided between the flash tank and the aging tank, and the two ends of the sixth pipeline are respectively installed corresponding to the discharge end of the flash tank and the inlet end of the aging tank. A seventh pipeline is provided between the steam discharge port of the flash tank and the cooling unit. By adopting the above technical solutions, the sixth pipeline can provide a continuous and closed conveying channel for materials from the flash tank to the aging tank, avoiding contamination caused by the material being exposed to the external environment during the transfer process, and ensuring a stable transition of the material after flash evaporation. The seventh pipeline can maintain the low-pressure environment of the flash tank, ensure the flash evaporation effect, and at the same time realize steam energy recovery and improve the energy efficiency of the system.

[0009] Preferably, the top of the aging tank is equipped with a motor, the output shaft of the motor extends into the aging tank and is connected to a stirring device, the stirring device includes a stirring shaft and stirring blades fixed on the stirring shaft, and an eleventh pipeline is provided between the discharge end of the aging tank and the inlet end of the cooling unit. By adopting the above technical solutions, the aging tank can ensure the uniformity of aging of high-viscosity materials and improve the stability of product structure. The eleventh pipeline can maintain the stability of material state, ensure uniform cooling effect, and adapt to the characteristics of high-viscosity materials after aging, reducing the risk of residue and blockage.

[0010] Preferably, the cooling unit is provided with a second heat exchange chamber, and an eighth pipe and a ninth pipe are provided between the cooling unit and the water heating system. The two ends of the eighth pipe are respectively installed with the refrigerant inlet of the cooling unit and the second outlet of the water heating system, and the two ends of the ninth pipe are respectively installed with the outlet of the second heat exchange chamber inside the cooling unit and the return water inlet of the water heating system. By adopting the above technical solutions, the eighth pipeline can provide a stable and controllable refrigerant for the cooling unit, ensuring the accuracy of the cooling effect, adapting to the thermal conductivity of high-viscosity materials, and improving cooling efficiency. The ninth pipeline can work in conjunction with the eighth pipeline to create a refrigerant circulation loop between the cooling unit and the water heating system, achieving energy saving and consumption reduction, reducing system operation and maintenance costs, and improving equipment practicality.

[0011] Preferably, the direct heating sterilization unit has a mixing heating chamber inside, and a tenth pipeline is provided between the steam inlet of the mixing heating chamber and the steam outlet of the steam tank, and a check valve is provided on the tenth pipeline; By adopting the above technical solutions, the tenth pipeline can serve as a backup channel when the third pipeline is unable to deliver the heat medium normally due to sudden situations such as blockage or leakage. This ensures that the preheating unit can still obtain a stable heat source and avoids production stoppage caused by preheating interruption. The check valve can accurately control the flow rate, achieve dynamic balance of preheating temperature, and distribute heat energy as needed, thereby achieving better energy saving and efficiency improvement. This significantly enhances the stability, flexibility, and energy efficiency of the high-viscosity material sterilization system.

[0012] Preferably, the inner walls of the first, second, fifth, and sixth pipelines are each provided with an anti-stick coating, and each of the first, second, fifth, and sixth pipelines is provided with a flow control valve; By adopting the above technical solutions, the anti-stick coating can reduce material residue, avoid cross-contamination and quality risks, prevent pipeline blockage, maintain process continuity, and accurately match the process requirements of each step by working with the flow control valve. This improves sterilization and quality effects, adapts to the conveying requirements of materials with different viscosities, enhances equipment versatility, reduces operating difficulty, and enables automated control.

[0013] Compared with the prior art, the beneficial effects of this application are: This invention features a compact overall structure and optimizes direct heating methods for various high-viscosity materials. By directly contacting the material with high-temperature steam, it solves the problem of low heat transfer efficiency, ensuring thorough sterilization and achieving efficient and uniform sterilization. The combined action of the flash tank and aging tank significantly improves the texture, flavor, and storage stability of high-viscosity materials, enhancing their quality. The water heating system provides a medium for the preheating and cooling units, enabling rational energy utilization and improving overall energy efficiency. Furthermore, the coordinated operation of each unit through pipelines and valves forms a continuous process flow, suitable for large-scale production and highly adaptable to industrial applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a direct-heating ultra-high temperature sterilizer suitable for high-viscosity materials according to the present invention; Figure 2 This is a schematic diagram of another perspective of the structure of a direct heating ultra-high temperature sterilizer suitable for high viscosity materials according to the present invention; Figure 3 This is a flowchart illustrating the operation of a direct-heating ultra-high temperature sterilizer suitable for high-viscosity materials according to the present invention.

[0015] In the diagram: 1. Material conveying unit; 2. Preheating unit; 3. Direct heating sterilization unit; 4. Flash tank; 5. Aging tank; 6. Cooling unit; 7. Steam tank; 8. Water heating system; 9. First pipeline; 10. Third pipeline; 11. Fourth pipeline; 12. Fifth pipeline; 13. First control valve; 14. Sixth pipeline; 15. Seventh pipeline; 16. Eighth pipeline; 17. Ninth pipeline; 18. Tenth pipeline; 19. Check valve; 20. Second pipeline; 21. Eleventh pipeline. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-3This invention provides a technical solution comprising a material conveying unit 1, which is a screw conveying pump. A preheating unit 2 is provided at the discharge end of the material conveying unit 1. The preheating unit 2 supports dynamic temperature curve presetting and can flexibly adjust the heating strategy according to different material characteristics and process requirements. A first pipeline 9 is provided between the material conveying unit 1 and the preheating unit 2. The two ends of the first pipeline 9 are respectively installed at the discharge end of the material conveying unit 1 and the inlet end of the preheating unit 2. The screw conveying pump and the first pipeline 9 work together to stably convey high-viscosity materials, providing a closed, uninterrupted conveying channel from the material conveying unit 1 to the preheating unit 2, thus better adapting to the conveyed materials. The preheating unit 2 allows for precise temperature control of the materials, significantly reducing their viscosity and ensuring smooth flow within the pipeline. The discharge end of the preheating unit 2 is equipped with a direct heating sterilization unit 3. A second pipeline 20 is provided between the preheating unit 2 and the direct heating sterilization unit 3. The two ends of the second pipeline 20 are fixedly connected to the discharge end of the preheating unit 2 and the feed end of the direct heating sterilization unit 3, respectively. The second pipeline 20 can realize the continuous and stable conveying of materials from preheating to direct heating sterilization, ensuring the continuity of the process flow and avoiding fluctuations in sterilization effect caused by interruption of material conveying or uneven flow rate. The direct heating sterilization unit 3 can sterilize and disinfect materials through high temperature, with a wide sterilization range and strong thoroughness. A flash tank 4 is installed on the side of the direct heating sterilization unit 3 away from the preheating unit 2. A fifth pipeline 12 is installed between the direct heating sterilization unit 3 and the flash tank 4. The two ends of the fifth pipeline 12 are respectively installed at the discharge end of the direct heating sterilization unit 3 and the inlet of the flash tank 4. The two ends of the fifth pipeline 12 are fixedly connected to the discharge end of the direct heating sterilization unit 3 and the inlet of the flash tank 4. The fifth pipeline 12 is designed to adapt to high temperature and high pressure environments, ensuring system safety and enabling rapid and non-stagnant conveying of ultra-high temperature materials to avoid quality deterioration. A first control valve 13 is installed on the fifth pipeline 12. The installation end of the first control valve 13 is fixedly connected to the fifth pipeline 12. The first control valve 13 can be configured to... The flash tank 4 effectively blocks the reverse influence of the low-pressure environment on the direct heating sterilization unit 3, preventing the material from flowing back to the direct heating sterilization unit 3 due to the low pressure in the flash tank 4, preventing the direct heating sterilization unit 3 from being damaged by a sudden pressure drop, and preventing the flash tank 4 from being subjected to additional load due to the backflow of material. This ensures the independent and stable operation of the direct heating sterilization unit 3 and the flash tank 4. The flash tank 4 maintains a low-pressure environment, and the ultra-high temperature material undergoes rapid adiabatic expansion after entering, with some moisture evaporating instantly. The heat absorption of water evaporation is used to achieve a rapid drop in material temperature, which greatly improves the cooling rate and minimizes the loss of heat-sensitive components. The flash tank 4 can quickly cool the heated material and prevent the thermal deterioration of high-viscosity materials. An aging tank 5 is installed at the discharge end of the flash tank 4. A motor is installed on the top of the aging tank 5. The output shaft of the motor extends into the interior of the aging tank 5 and is connected to a stirring device. The stirring device includes a stirring shaft and stirring blades fixed on the stirring shaft. The aging tank 5 has a multi-modal temperature control system, which can adapt to different material requirements, accurately control and maintain constant temperature, and ensure the stability of the material structure. The setting of the aging tank 5 can ensure the uniformity of aging of high-viscosity materials and improve the stability of the product structure. A sixth pipeline 14 is set between the flash tank 4 and the aging tank 5. The two ends of the sixth pipeline 14 are respectively installed at the discharge end of the flash tank 4 and the feed end on the aging tank 5. The two ends of the sixth pipeline 14 are fixedly connected to the discharge end of the flash tank 4 and the feed end on the aging tank 5. The setting of the sixth pipeline 14 can provide a continuous closed conveying channel for materials from the flash tank 4 to the aging tank 5, avoiding the contamination caused by the material being exposed to the external environment during the transfer process, and ensuring the stable transition of the material after flash evaporation. The inner walls of the first pipeline 9, the second pipeline 20, the fifth pipeline 12, and the sixth pipeline 14 are each provided with an anti-stick coating. The anti-stick coating is uniformly applied along the inner walls of the first pipeline 9, the second pipeline 20, the fifth pipeline 12, and the sixth pipeline 14. The anti-stick coating can reduce material residue, avoid cross-contamination and quality risks, prevent pipeline blockage, and maintain the continuity of the process. The first pipeline 9, the second pipeline 20, the fifth pipeline 12, and the sixth pipeline 14 are each provided with a flow control valve. The coordination of the flow control valves can accurately match the process requirements of each process, improve the sterilization and quality effect, adapt to the conveying requirements of materials with different viscosities, improve the versatility of the equipment, and at the same time reduce the difficulty of operation and realize automated control. A cooling unit 6 is provided at the discharge end of the aging tank 5. The cooling unit 6 adopts a composite cooling structure of jacket pre-cooling and spiral guide plate deep cooling. A seventh pipe 15 is provided between the steam discharge port of the flash tank 4 and the cooling unit 6. The two ends of the seventh pipe 15 are fixedly connected to the steam discharge port of the flash tank 4 and the feed port of the cooling unit 6, respectively. The setting of the seventh pipe 15 can maintain the low-pressure environment of the flash tank 4, ensure the flashing effect, and realize steam energy recovery to improve the energy efficiency of the system. An eleventh pipe 21 is provided between the discharge end of the aging tank 5 and the feed end of the cooling unit 6. The two ends of the eleventh pipe 21 are fixedly connected to the discharge end of the aging tank 5 and the feed end of the cooling unit 6. The setting of the eleventh pipe 21 can maintain the stability of the material state, ensure the uniformity of the cooling effect, and adapt to the characteristics of high viscosity materials after aging, reducing the risk of residue and blockage. A steam tank 7 is located on the side of the cooling unit 6 away from the aging tank 5. The direct heating sterilization unit 3 has a mixing heating chamber inside. A tenth pipe 18 is installed between the steam inlet of the mixing heating chamber and the steam outlet of the steam tank 7. The two ends of the tenth pipe 18 are fixedly connected to the steam inlet of the mixing heating chamber and the steam outlet of the steam tank 7, respectively. The tenth pipe 18 serves as a backup channel when the third pipe 10 cannot deliver the heat medium normally due to blockage, leakage, or other emergencies, ensuring that the preheating unit 2 still receives a stable heat source and avoiding production stoppage due to preheating interruption. A check valve 19 is installed on the tenth pipe 18, with its mounting end fixedly connected to the tenth pipe 18. The check valve 19 can regulate the flow rate. Precise control enables dynamic balance of preheating temperature and on-demand distribution of heat energy, resulting in better energy saving and efficiency improvement. This significantly enhances the stability, flexibility, and energy efficiency of the high-viscosity material sterilization system. The mixing and heating chamber in the direct heating sterilization unit 3 is connected to the steam tank 7 via the tenth pipeline 18. High-temperature steam can directly mix with or come into close contact with the preheated high-viscosity material. Heat transfer does not require intermediate media such as metal walls, improving heat exchange efficiency and avoiding local overheating or underheating. The steam tank 7 can solve the problem of steam supply and demand imbalance by using volumetric energy storage and intelligent regulation when the steam consumption exceeds the boiler's steam production, ensuring production continuity. At the same time, multi-stage separation technology ensures the dryness of the output steam, meeting the stringent requirements of high-viscosity materials for steam quality. A water heating system 8 is installed on one side of the steam tank 7. The water heating system 8 integrates a PID closed-loop control system and a multi-stage heating module, enabling precise temperature control and preventing material quality fluctuations. The water heating system 8 is equipped with a variable frequency booster pump and a flow sensor, ensuring stable flow output and process continuity. A third pipeline 10 and a fourth pipeline 11 are respectively installed between the preheating unit 2 and the water heating system 8. The two ends of the third pipeline 10 are respectively connected to the inlet of the first heat exchange chamber in the preheating unit 2 and the first output port of the water heating system 8. The first output port of the system 8 is fixedly connected. The third pipe 10 provides a stable and controllable heat source for the preheating unit 2. Through heat exchange between the heat medium and the material, the preheating temperature of the high-viscosity material is precisely controlled to ensure that the material reaches the optimal preheating state before entering the direct heating sterilization unit 3. The two ends of the fourth pipe 11 are respectively installed corresponding to the outlet of the first heat exchange chamber in the preheating unit 2 and the return water port of the water heating system 8. The two ends of the fourth pipe 11 are fixedly connected to the outlet of the first heat exchange chamber in the preheating unit 2 and the return water port of the water heating system 8. The fourth pipe 11 can cooperate with the third pipe 10 to make the preheating unit 2 and the water... A heat medium circulation loop is constructed between the heating systems 8, allowing the heat medium that has undergone heat exchange and temperature reduction in the preheating unit 2 to flow back to the water heating system 8 for reheating, thus realizing the recycling of the heat medium, significantly improving energy utilization, and reducing system energy consumption. The cooling unit 6 has a second heat exchange chamber. An eighth pipe 16 and a ninth pipe 17 are installed between the cooling unit 6 and the water heating system 8. The two ends of the eighth pipe 16 are respectively installed at the refrigerant inlet of the cooling unit 6 and the second outlet of the water heating system 8. The eighth pipe 16 is fixedly connected to the refrigerant inlet of the cooling unit 6 and the second outlet of the water heating system 8. The configuration of pipe 16 provides a stable and controllable refrigerant for cooling unit 6, ensuring accurate cooling effect, adapting to the thermal conductivity of high-viscosity materials, and improving cooling efficiency. The two ends of the ninth pipe 17 are respectively installed at the outlet of the second heat exchange chamber inside cooling unit 6 and the return water port of water heating system 8. The configuration of the ninth pipe 17 can cooperate with the eighth pipe 16 to form a refrigerant circulation loop between cooling unit 6 and water heating system 8, achieving energy saving and consumption reduction, reducing system operation and maintenance costs, and improving equipment practicality.

[0018] The implementation principle of this application is as follows: First, the high-viscosity material to be sterilized is transported to the preheating unit 2 through the material conveying unit 1 and the first pipeline 9. At this time, the water heating system 8 provides hot water to the preheating unit 2 through the third pipeline 10 to preheat the material. Then, the preheated material is transported to the direct heating sterilization unit 3 through the second pipeline 20. At this time, the steam tank 7 provides high-temperature steam to the direct heating sterilization unit 3 through the tenth pipeline 18, so that the high-temperature steam comes into direct contact with the material, thereby rapidly heating the material in a very short time, thus completing the ultra-high temperature sterilization of the material. Finally, the sterilized material is transported from the direct heating sterilization unit 3 through the fifth pipeline 12. The material is conveyed to flash tank 4, where the pressure inside flash tank 4 is maintained at absolute pressure. After flash evaporation, the material is rapidly cooled to the set temperature, and volatile impurities are removed. Then, the flash-evaporated material is introduced into aging tank 5 through the sixth pipeline 14. At this time, the temperature inside aging tank 5 is maintained at a stable temperature. The motor drives the stirring device to slowly stir the material, keeping it warm and aging it to complete the structural stabilization of the material. Finally, the aged material enters the cooling unit 6 through the eleventh pipeline 21. The water heating system 8 provides cooling water to the cooling unit 6 through the ninth pipeline 17 to cool the material before aseptic filling, resulting in a thoroughly sterilized and uniformly stable material.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0020] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A direct-heating ultra-high temperature sterilizer suitable for high-viscosity materials, comprising a material conveying unit (1), characterized in that: The material conveying unit (1) is provided with a preheating unit (2) at the discharge end. The preheating unit (2) is provided with a direct heating sterilization unit (3) at the discharge end. The direct heating sterilization unit (3) is provided with a flash tank (4) on the side away from the preheating unit (2). The flash tank (4) is provided with an aging tank (5) at the discharge end. The aging tank (5) is provided with a cooling unit (6) at the discharge end. The cooling unit (6) is provided with a steam tank (7) on the side away from the aging tank (5). The steam tank (7) is provided with a water heating system (8) on the side.

2. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 1, characterized in that: The material conveying unit (1) is a screw conveying pump. A first pipeline (9) is provided between the material conveying unit (1) and the preheating unit (2). The two ends of the first pipeline (9) are respectively installed at the discharge end of the material conveying unit (1) and the feed end of the preheating unit (2).

3. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 1, characterized in that: A second pipeline (20) is provided between the preheating unit (2) and the direct heating sterilization unit (3). The preheating unit (2) is provided with a first heat exchange chamber. A third pipeline (10) and a fourth pipeline (11) are provided between the preheating unit (2) and the water heating system (8). The two ends of the third pipeline (10) are respectively installed with the inlet of the first heat exchange chamber in the preheating unit (2) and the first outlet of the water heating system (8). The two ends of the fourth pipeline (11) are respectively installed with the outlet of the first heat exchange chamber in the preheating unit (2) and the return water port of the water heating system (8).

4. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 1, characterized in that: A fifth pipeline (12) is provided between the direct heating sterilization unit (3) and the flash tank (4). The two ends of the fifth pipeline (12) are respectively installed at the discharge end of the direct heating sterilization unit (3) and the inlet of the flash tank (4). A first control valve (13) is provided on the fifth pipeline (12).

5. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 1, characterized in that: A sixth pipeline (14) is provided between the flash tank (4) and the aging tank (5). The two ends of the sixth pipeline (14) are respectively installed at the discharge end of the flash tank (4) and the feed end of the aging tank (5). A seventh pipeline (15) is provided between the steam discharge port of the flash tank (4) and the cooling unit (6).

6. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 1, characterized in that: The aging tank (5) is equipped with a motor at the top. The output shaft of the motor extends into the aging tank (5) and is connected to a stirring device. The stirring device includes a stirring shaft and stirring blades fixed on the stirring shaft. An eleventh pipeline (21) is provided between the discharge end of the aging tank (5) and the inlet end of the cooling unit (6).

7. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 1, characterized in that: The cooling unit (6) is provided with a second heat exchange chamber. An eighth pipe (16) and a ninth pipe (17) are provided between the cooling unit (6) and the water heating system (8). The two ends of the eighth pipe (16) are respectively installed with the refrigerant inlet of the cooling unit (6) and the second outlet of the water heating system (8). The two ends of the ninth pipe (17) are respectively installed with the outlet of the second heat exchange chamber inside the cooling unit (6) and the return water outlet of the water heating system (8).

8. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 1, characterized in that: The direct heating sterilization unit (3) is provided with a mixing heating chamber inside. A tenth pipeline (18) is provided between the steam inlet of the mixing heating chamber in the direct heating sterilization unit (3) and the steam outlet of the steam tank (7). A check valve (19) is provided on the tenth pipeline (18).

9. The direct heating ultra-high temperature sterilizer suitable for high-viscosity materials according to claim 5, characterized in that: The inner walls of the first pipeline (9), the second pipeline (20), the fifth pipeline (12) and the sixth pipeline (14) are each provided with an anti-stick coating, and each of the first pipeline (9), the second pipeline (20), the fifth pipeline (12) and the sixth pipeline (14) is provided with a flow control valve.

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