UHT material sterilizer

Abstract

The utility model relates to a UHT (Ultra High Temperature) material sterilizer which comprises a balance tank, a material pump, a preheating section heat exchanger, a sterilization section heat exchanger, a heat recovery section heat exchanger, a cooling section heat exchanger and a return pipe section, the first output end of the first reversing valve is communicated with the material input end of the heat recovery section heat exchanger, the second output end of the first reversing valve is communicated with the material input end of the cooling section heat exchanger, and the material output end of the heat recovery section heat exchanger is also communicated with the material input end of the cooling section heat exchanger; the material output end of the cooling section heat exchanger is communicated with one end of the backflow pipe section, and the other end of the backflow pipe section is communicated with the balance tank. Materials can be directly conveyed into the cooling section heat exchanger to be cooled and flow back into the balance tank through the first reversing valve according to the sterilization temperature of the materials, invalid heat exchange and work doing of equipment are avoided, and the heat exchange efficiency and the material sterilization efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sterilizers, in particular to a UHT material sterilizer. Background Art

[0002] When liquid products such as fruit and vegetable purees, fruit juices, concentrated juices, milk, fruit juice beverages or similar products are subjected to aseptic filling production, the materials need to be subjected to ultra-high temperature instantaneous sterilization (UHT) before filling. The ultra-high temperature instantaneous sterilizer is abbreviated as UHT sterilizer. In the material pipeline of the UHT sterilizer, from the inlet to the outlet, there are successively included a material balance tank, a material pump, a preheating section, a sterilization section, a heat recovery section and a cooling section. The material output end of the cooling section is connected to the material balance tank through a return pipe. During the material transportation process, the material is initially heat-exchanged and heated up in the preheating section, and then heat-exchanged and heated up again in the sterilization section to reach the sterilization temperature. Then, the high-temperature material is heat-exchanged and preliminarily cooled in the heat recovery section to recover heat, and finally heat-exchanged and cooled down to room temperature in the cooling section and then flows back to the material balance tank.

[0003] In the initial stage of the system startup of the existing sterilizer, the sterilization section is in the heating stage, and the material enters the heat recovery section for heat exchange before reaching the required sterilization temperature, which makes the heat recovery section perform ineffective heat exchange operations and reduces the heat recovery efficiency. In addition, after the material is heated up in the sterilization section, the high-temperature material directly enters the heat recovery section for cooling. The high-temperature sterilization reaction time of the material is short, resulting in slow sterilization efficiency. Therefore, usually the material needs to be subjected to multiple cycles of heating and sterilization before it can meet the specified sterilization requirements. However, after the material goes through multiple cycles of heating and cooling, the flavor of the product cannot be maintained. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a sterilizer that improves the heat recovery efficiency and reduces the influence of the material sterilization process on the product flavor.

[0005] The utility model is realized by the following technical solutions. A UHT material sterilizer includes a balance tank, a material pump, a preheating section heat exchanger, a sterilization section heat exchanger, a heat recovery section heat exchanger, a cooling section heat exchanger and a return pipe section that are sequentially connected through material ports. The material output end of the sterilization section heat exchanger is connected with a first reversing valve. The first output end of the first reversing valve is communicated with the material input end of the heat recovery section heat exchanger, and the second output end of the first reversing valve is communicated with the material input end of the cooling section heat exchanger. The material output end of the heat recovery section heat exchanger is also communicated with the material input end of the cooling section heat exchanger. The material output end of the cooling section heat exchanger is communicated with one end of the return pipe section, and the other end of the return pipe section is communicated with the balance tank.

[0006] In this solution, the materials are transported by a material pump and flow through the preheating section heat exchanger and the sterilization section heat exchanger in sequence for heat exchange and temperature rise. If the material temperature does not reach the sterilization temperature, the first reversing valve directly transports the material to the cooling section heat exchanger through the second output end for cooling and then returns to the balance tank for temporary storage, without the need for heat recovery in the heat recovery section heat exchanger, which is convenient for the heat exchange of subsequent materials with qualified temperatures. When the material temperature reaches the sterilization temperature, the first reversing valve then transports the material to the heat recovery section heat exchanger through the first output end for heat exchange and heat recovery, which is convenient to use and improves the material sterilization efficiency.

[0007] As an optimization, it also includes a heat preservation pipe section. The material input end of the heat preservation pipe section is connected to the first output end of the first reversing valve, and the material output end of the heat preservation pipe section is connected to the material input end of the heat recovery section heat exchanger. This optimized solution extends the flow distance of the high-temperature material through the heat preservation pipe section, thereby increasing the high-temperature sterilization duration of the material and improving the material sterilization effect. There is no need for multiple cycles of sterilization, thus reducing the impact on the original flavor of the product.

[0008] As an optimization, the first output end of the first reversing valve is detachably connected to the heat preservation pipe section through a first cross joint elbow, and the heat recovery section heat exchanger is detachably connected to the heat preservation pipe section through a second cross joint elbow. The heat preservation pipe end includes multiple parallel heat preservation pipes, and one end of adjacent heat preservation pipes is detachably connected through a third cross joint elbow to form a serpentine heat preservation pipe section. In this optimized solution, the first cross joint elbow, the second cross joint elbow, and the third cross joint elbow are all detachably arranged. Then, the first cross joint elbow and the second cross joint elbow can be connected to different heat preservation pipes according to the material sterilization duration requirements, thereby changing the conveying length of the heat preservation pipe section and further realizing different heat preservation and sterilization durations.

[0009] As an optimization, a second reversing valve is connected to the end of the return pipe section far from the cooling section heat exchanger. The third output end of the second reversing valve is connected to the balance tank, and the fourth output end of the second reversing valve is connected to a drain pipe, and the drain pipe is connected to the material input end of the material pump. This optimized solution facilitates the return of the material to the balance tank through the third output end of the second reversing valve, and during cleaning, the cleaning water can return to the material pump for circulating cleaning through the fourth output end of the second reversing valve, making it more convenient to use.

[0010] As an optimization, a thermometer is provided between the material output end of the sterilization section heat exchanger and the first reversing valve. This optimized solution facilitates the judgment of whether the material reaches the sterilization temperature requirement through the thermometer.

[0011] As an optimization, it further includes a heating recovery device. The heating recovery device includes a hot water tank, a water transfer pump, and a steam heat exchanger. The water stored in the hot water tank is transported by the water transfer pump and sequentially flows through the heat recovery section heat exchanger, the steam heat exchanger, the sterilization section heat exchanger, and the preheating section heat exchanger before flowing back into the hot water tank. In this optimization scheme, the stored water exchanges heat with the high-temperature material in the heat recovery section heat exchanger to cool the material. The heated hot water is heated by the steam heat exchanger and flows to the sterilization temperature and is then transported to the sterilization section heat exchanger and the preheating section heat exchanger to exchange heat with the material to heat and sterilize the material. Finally, the cooled cold water flows back into the hot water tank to form a cycle, improving the heat recovery efficiency.

[0012] As an optimization, a water inlet pipe is provided at the top of the balance tank, and a spray head is provided inside the balance tank. The spray head is communicated with the water inlet pipe. In this optimization scheme, the inside of the balance tank is cleaned through the spray head and the material transfer pipeline is flushed through the material pump.

[0013] As an optimization, it further includes an acid tank and an alkali tank. The acid tank and the alkali tank respectively transport acid liquid and alkali liquid into the balance tank through a first diaphragm pump and a second diaphragm pump. In this optimization scheme, acid liquid is transported into the balance tank through the first diaphragm pump for pickling, and alkali liquid is transported into the balance tank through the second diaphragm pump for alkali washing, improving the flushing effect.

[0014] The beneficial effects of the present utility model are as follows: The material is transported through the material pump and sequentially flows through the preheating section heat exchanger and the sterilization section heat exchanger for heat exchange and temperature rise. If the material temperature does not reach the sterilization temperature, the first reversing valve directly transports the material into the cooling section heat exchanger through the second output end for cooling and flowing back into the balance tank, without the need for heat recovery in the heat recovery end heat exchanger, facilitating the heat exchange of the subsequent materials with qualified temperatures. When the material temperature reaches the sterilization temperature, the first reversing valve then transports the material to the heat recovery end heat exchanger through the first output end for heat exchange and heat recovery, which is convenient to use and improves the heat recovery efficiency and the material sterilization efficiency. By extending the flow distance of the high-temperature material through the heat preservation pipe section, the high-temperature sterilization time of the material is increased, thereby improving the material sterilization effect and reducing the impact on the original flavor of the product.

[0015] The heat of the material in the heat recovery section heat exchanger is circulated and cooled through the heating recovery device, and the materials in the sterilization section heat exchanger and the preheating section heat exchanger are circulated and heated, realizing the cyclic utilization of heat during the sterilization process, reducing heat dissipation, and improving the heat recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of the present utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 3 It is a structural schematic diagram of the heat preservation pipe end;

[0019] As shown in the figure:

[0020] 1. Balance tank, 2. Material pump, 3. Preheating section heat exchanger, 4. Sterilization section heat exchanger, 5. First reversing valve, 6. Insulation pipe section, 61. Insulation pipe, 62. First cross joint elbow, 63. Second cross joint elbow, 64. Third cross joint elbow, 65. Quick coupling clamp, 7. Heat recovery section heat exchanger, 8. Cooling section heat exchanger, 9. Thermometer, 10. Return pipe section, 11. Second reversing valve, 12. Drain pipe, 13. Hot water tank, 14. Water transfer pump, 15. Steam heat exchanger, 16. Cooling tower, 17. Acid tank, 18. Alkali tank, 19. First diaphragm pump, 20. Second diaphragm pump, 21. Drain pipe, 22. Discharge branch pipe, 23. Back pressure valve, 24. Overflow pipe, 25. Support, 26. Control cabinet, 27. Spray head, 28. Water inlet pipe, 29. Butterfly valve, 30. Feed pipe. Specific implementation mode

[0021] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation modes.

[0022] As Figures 1 - 2 shown, a UHT material sterilizer includes a balance tank 1, a material pump 2, a preheating section heat exchanger 3, a sterilization section heat exchanger 4, a heat recovery section heat exchanger 7, a cooling section heat exchanger 8, and a return pipe section 10 that are sequentially connected through material ports.

[0023] Specifically, the discharge port of the balance tank 1 is connected to the material input end of the material pump 2. In this embodiment, the discharge port at the bottom of the balance tank 1 is connected to a first three-way pipe fitting, the material input end of the material pump 2 is connected to one port of the first three-way pipe fitting, and the other port of the first three-way pipe fitting is connected to a drain pipe 21. Butterfly valves are provided on the connecting pipelines of the drain pipe 21, the material pump 2, and the first three-way pipe fitting.

[0024] In this embodiment, a feed pipe 30 is provided on the side wall of the balance tank. A butterfly valve 29 is installed on the feed pipe. The port of the feed pipe 30 is connected to a four-way pipe fitting. The upper port of the four-way pipe fitting is the CIP cleaning water return port, the side port of the four-way pipe fitting is the feed port and is connected to a feeding device, the lower port of the four-way pipe fitting is connected to the drain pipe 21, and butterfly valves are also installed on the upper port and the lower port of the four-way pipe fitting.

[0025] The material output end of the material pump 2 is connected to the material input end of the preheating section heat exchanger 3, and a check valve, a flow meter, a regulating ball valve, and a pressure gauge are sequentially provided on the connecting pipeline between the material pump 2 and the preheating section heat exchanger 3.

[0026] The material input end of the preheating section heat exchanger 3 is communicated with the material output end of the sterilization section heat exchanger 4. A first reversing valve 5 is connected to the material output end of the sterilization section heat exchanger 4, and a thermometer 9 is provided on the connecting pipeline between the material output end of the sterilization section heat exchanger 4 and the first reversing valve 5.

[0027] The first output end of the first reversing valve 5 is communicated with the material input end of the heat recovery section heat exchanger 7. Preferably, this embodiment further includes a heat preservation pipe section 6. The heat preservation pipe section 6 is located between the first reversing valve 5 and the heat recovery section heat exchanger 7. The material input end of the heat preservation pipe section 6 is communicated with the first output end of the first reversing valve 5, and the material output end of the heat preservation pipe section 6 is communicated with the material input end of the heat recovery section heat exchanger 7.

[0028] As Figure 3 As shown, the first output end of the first reversing valve 5 in this embodiment is detachably connected to the heat preservation pipe section 6 through a first cross joint elbow 62, and the heat recovery section heat exchanger 7 is detachably connected to the heat preservation pipe section 6 through a second cross joint elbow 63. The heat preservation pipe end 6 includes a plurality of heat preservation pipes 61 arranged side by side. One end of adjacent heat preservation pipes 61 is detachably connected through a third cross joint elbow 64 to form a heat preservation pipe section 6 extending in a serpentine shape. The port diameters of the first cross joint elbow 62, the second cross joint elbow 63, and the third cross joint elbow 64 are the same and can be connected to the ports of each heat preservation pipe. The first cross joint elbow 62 and the first output end port, the second cross joint elbow 63 and the heat recovery section heat exchanger 7 port, and the first cross joint elbow 62, the second cross joint elbow 63, and the third cross joint elbow 64 and the heat preservation pipe 61 port are all detachably connected through quick connection clamps 65, realizing quick disassembly and assembly, and being convenient to use.

[0029] In this embodiment, the length of the heat preservation pipe section 6 can be adjusted according to different requirements for the heat preservation and sterilization duration of different materials. During use, by removing the third cross joint elbow of the heat preservation pipe and connecting the first cross joint elbow or the second cross joint elbow to the corresponding heat preservation pipe port, the length adjustment of the heat preservation pipe section can be realized. For example, in this embodiment, the heat preservation pipe section is provided with six heat preservation pipes. If only four heat preservation pipes need to be communicated, the third cross joint elbow at the material output end of the fourth heat preservation pipe is removed, and the second cross joint elbow is connected to the port of the material output end of this heat preservation pipe, thus shortening the length of the heat preservation pipe section.

[0030] The second output end of the first reversing valve 5 is communicated with the material input end of the cooling section heat exchanger 8, and the material output end of the heat recovery section heat exchanger 7 is also communicated with the material input end of the cooling section heat exchanger 8. Specifically, a second three-way pipe fitting is connected to the second output end of the first reversing valve 5. The material input end of the cooling section heat exchanger 8 and the material output end of the heat recovery section heat exchanger 7 are respectively connected to the other two ports of the second three-way pipe fitting.

[0031] A check valve is provided on the connecting pipeline between the second output end of the first reversing valve 5 and the second three-way pipe fitting in this embodiment. A thermometer 9, a back pressure valve 23, a discharge branch pipe 22, a butterfly valve 29, and a check valve are successively provided on the connecting pipeline between the heat recovery section heat exchanger 7 and the second three-way pipe fitting. A butterfly valve is also installed on the discharge branch pipe 22, and the discharge branch pipe 22 is connected to a storage tank.

[0032] The material output end of the cooling section heat exchanger 8 is communicated with one end of a reflux pipe section 10, and the other end of the reflux pipe section 10 is communicated with a balance tank 1. Preferably, a back pressure valve 23 is provided between the material output end of the cooling section heat exchanger 8 and the reflux pipe section 10 in this embodiment. One end of the reflux pipe section 10 away from the cooling section heat exchanger 8 is connected to a second reversing valve 11. The third output end of the second reversing valve 11 is communicated with the balance tank 1, and the fourth output end of the second reversing valve 11 is connected to a drain pipe 12. The drain pipe 12 is communicated with the material input end of a material pump 2. Specifically, one end of the drain pipe 12 away from the second reversing valve 11 is connected to a sixth three-way pipe fitting. One port of the sixth three-way pipe fitting is communicated with the material input end of the material pump 2, and the other port of the sixth three-way pipe fitting is communicated with a sewage discharge pipe 21. Butterfly valves 29 are installed on the connecting pipelines between the sixth three-way pipe fitting and the material pump and the sewage discharge pipe.

[0033] This embodiment further includes a heat recovery device, which includes a hot water tank 13, a water transfer pump 14, and a steam heat exchanger 15. The water stored in the hot water tank 13 is conveyed by the water transfer pump 14 and successively flows through the heat recovery section heat exchanger 7, the steam heat exchanger 15, the sterilization section heat exchanger 4, and the preheating section heat exchanger 3 and then returns to the hot water tank 13.

[0034] Specifically, the water outlet of the hot water tank 13 is communicated with the input end of the water transfer pump 14. The water outlet at the bottom of the hot water tank 13 in this embodiment is respectively communicated with the water transfer pump 14 and the sewage discharge pipe 21 through a third three-way pipe fitting, and a butterfly valve is provided on the connecting pipeline between the third three-way pipe fitting and the sewage discharge pipe 21. The top of the hot water tank 13 is connected with an overflow pipe 24, the overflow pipe 24 is communicated with the sewage discharge pipe 21, and a butterfly valve is provided on the overflow pipe 24.

[0035] The output end of the water transfer pump 14 is communicated with the hot water input end of the heat recovery section heat exchanger 7, and a check valve and a regulating ball valve are successively provided on the connecting pipeline between the water transfer pump 14 and the heat recovery section heat exchanger 7.

[0036] The hot water output end of the heat recovery section heat exchanger 7 is communicated with the hot water input end of the steam heat exchanger 15, and a thermometer 9 is provided on the connecting pipeline between the heat recovery section heat exchanger 7 and the steam heat exchanger 15. High-temperature steam is input into the steam heat exchanger in this embodiment to heat the hot water.

[0037] The heat exchange water output end of the steam heat exchanger 15 is communicated with the heat exchange water input end of the sterilization section heat exchanger 4, the heat exchange water output end of the sterilization section heat exchanger 4 is communicated with the heat exchange water input end of the preheating section heat exchanger 3, and the heat exchange water output end of the preheating section heat exchanger 3 is communicated with the hot water tank 13. And a thermometer 9 is provided on the connecting pipeline between the preheating section heat exchanger 3 and the hot water tank 13.

[0038] A cooling tower 16 is connected between the heat exchange water input end and the heat exchange water output end of the cooling section heat exchanger 8, and the heat exchange water input end of the cooling section heat exchanger 8 is respectively communicated with the cooling tower 16 and the sewage pipe 21 through a fourth three-way pipe fitting.

[0039] A water inlet pipe 28 is provided at the top of the balance tank 1, a spray head 27 is arranged in the balance tank 1, the spray head 27 is communicated with the water inlet pipe 28, and the material output end of the material pump 2 is communicated with the water inlet pipe 28 through a fifth three-way pipe fitting. This embodiment further includes an acid tank 17 and an alkali tank 18, and the acid tank 17 and the alkali tank 18 respectively convey acid liquid and alkali liquid into the balance tank 1 through a first diaphragm pump 19 and a second diaphragm pump 20, and the first diaphragm pump and the second diaphragm pump are both communicated with the water inlet pipe 2.

[0040] As Figure 2 As shown, this embodiment further includes a bracket 25 and a control cabinet 26 fixedly arranged on the bracket. The balance tank, the material pump, the preheating section heat exchanger, the sterilization section heat exchanger, the heat preservation pipe section, the heat recovery section heat exchanger, the cooling section heat exchanger, the return pipe section, the steam heat exchanger, the hot water tank, the water transfer pump, the acid tank, the alkali tank, the first diaphragm pump, and the second diaphragm pump are all fixedly arranged on the bracket.

[0041] Working principle: The material in the balance tank 1 is conveyed by the material pump 2 and flows through the preheating section heat exchanger 3 and the sterilization section heat exchanger 4 for heat exchange and temperature rise. If the temperature does not reach the sterilization temperature requirement, the material is conveyed into the cooling section heat exchanger 8 through the second output end of the first reversing valve 5 to be cooled and then flows back to the material tank 1 for temporary storage, so as to avoid the material entering the heat recovery section heat exchanger 7 for ineffective heat exchange operation and reducing the heat recovery effect. When the temperature reaches the sterilization temperature requirement, the port of the first reversing valve 5 is switched, and the material is conveyed into the heat preservation section heat exchanger 6 through the first output end of the first reversing valve 5 for heat preservation. By extending the high-temperature material path and high-temperature sterilization time, the sterilization effect is improved. Finally, the material flows through the heat recovery section heat exchanger 7 for heat exchange and temperature reduction, and is sent into the storage tank for collection through the discharge branch pipe 22.

[0042] The low-temperature water in the hot water tank 13 of the heating recovery device is conveyed to the heat recovery section heat exchanger 7 through the water transfer pump 14 to exchange heat with the high-temperature material to cool the material. The heat-exchanged hot water is heated into high-temperature water by the steam heat exchanger 15, and the high-temperature water is conveyed into the sterilization section heat exchanger 4 and the preheating section heat exchanger 3 to exchange heat with the material to heat and sterilize the material. Finally, the heat-exchanged low-temperature water flows back into the hot water tank 13 to form a cycle.

[0043] When flushing the material conveying pipeline, clean water is introduced into the balance tank 1 through the water inlet pipe 28, the balance tank is cleaned through the spray head 27, and the clean water is conveyed by the material pump 2 and flows through the preheating section heat exchanger 3, the sterilization section heat exchanger 4, the heat preservation pipe section 6, the heat recovery section heat exchanger 7, the cooling section heat exchanger 8, and the return pipe section 10 in sequence to reach the second reversing valve 11. Then, the flushing water is sent back into the material pump 2 through the drain pipe 12 for circulating flushing. After the circulating flushing, the drain pipe 12 discharges the flushing water into the sewage pipe 21 to complete the flushing. In this way, acid liquid and alkali liquid are respectively conveyed into the balance tank 1 through the first diaphragm pump 19 and the second diaphragm pump 20, so that the material conveying pipeline can be pickled and alkali washed.

[0044] Of course, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or adopt the prior art, and will not be elaborated here. The above embodiments and the accompanying drawings are only used to illustrate the technical solutions of the present utility model and are not intended to limit the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions, or substitutions made by those of ordinary skill in the technical field within the scope of the essence of the present utility model do not depart from the purpose of the present utility model and should also fall within the scope of the protection of the claims of the present utility model.

Claims

1. A UHT material sterilizer, comprising a balance tank (1), a material pump (2), a preheating section heat exchanger (3), a sterilization section heat exchanger (4), a heat recovery section heat exchanger (7), a cooling section heat exchanger (8) and a reflux pipe section (10), the material ports of which are sequentially connected, characterized in that: The material output end of the sterilization section heat exchanger (4) is connected to a first reversing valve (5), the first output end of the first reversing valve is connected to the material input end of the heat recovery section heat exchanger (7), the second output end of the first reversing valve is connected to the material input end of the cooling section heat exchanger (8), the material output end of the heat recovery section heat exchanger (7) is also connected to the material input end of the cooling section heat exchanger (8), the material output end of the cooling section heat exchanger (8) is connected to one end of the reflux pipe section (10), and the other end of the reflux pipe section is connected to the balance tank (1).

2. A UHT material sterilizer according to claim 1, characterized in that: It also comprises an insulating pipe section (6), wherein a material input end of the insulating pipe section (6) is connected to a first output end of the first reversing valve (5), and a material output end of the insulating pipe section is connected to a material input end of the heat recovery section heat exchanger (7).

3. A UHT material sterilizer according to claim 2, characterized in that: The first output end of the first reversing valve (5) is detachably connected to the insulation pipe section (6) via a first jumper elbow (62), and the heat recovery section heat exchanger (7) is detachably connected to the insulation pipe section (6) via a second jumper elbow (63). The insulation pipe section (6) comprises a plurality of insulation pipes (61) arranged side by side, and one end of adjacent insulation pipes (61) is detachably connected via a third jumper elbow (64) to form a serpentine-shaped insulation pipe section (6).

4. A UHT material sterilizer according to claim 1, characterized in that: One end of the return pipe section (10) away from the cooling section heat exchanger (8) is connected to a second reversing valve (11), a third output end of the second reversing valve is in communication with the balance tank (1), a fourth output end of the second reversing valve is connected to a drain pipe (12), and the drain pipe (12) is in communication with a material input end of the material pump (2).

5. A UHT material sterilizer according to claim 1, characterized in that: A temperature meter (9) is provided between the material output end of the sterilization section heat exchanger (4) and the first reversing valve (5).

6. A UHT material sterilizer according to claim 1, characterized in that: The invention also comprises a heating recovery device, the heating recovery device comprising a hot water tank (13), a water delivery pump (14) and a steam heat exchanger (15); the water stored in the hot water tank is delivered by the water delivery pump (14) to flow in sequence through a heat recovery section heat exchanger (7), a steam heat exchanger (15), a sterilization section heat exchanger (4), and a preheating section heat exchanger (3) before returning to the hot water tank (13).

7. A UHT material sterilizer according to claim 1, characterized in that: A water inlet pipe (28) is provided at the top of the balancing tank (1), and a spray head (27) is provided in the balancing tank, the spray head and the water inlet pipe being in communication.

8. A UHT material sterilizer according to claim 1, characterized in that: It also includes an acid tank (17) and an alkali tank (18), wherein the acid tank and the alkali tank transport acid solution and alkali solution to the balance tank (1) respectively through a first diaphragm pump (19) and a second diaphragm pump (20).

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