Material sterilization system

Abstract

The invention provides a material sterilization system, and relates to the technical field of food production. The material sterilization system comprises a system feed port, a raw material heat recovery heat exchange system, a first heater, a second heater, a third heater, a temperature retainer, a sterilization heat recovery device, a cooling device and a system discharge port, materials are fed from the system feeding port and then sequentially pass through the raw material heat recovery heat exchange system, the first heater, the second heater, the third heater, the temperature retainer, the sterilization heat recovery device, the cooling device and the system discharging port. The temperature of a heat exchange medium of the raw material heat recovery heat exchange system is lower than that of a material entering the first heat exchanger; the heating temperature of the first heater, the heating temperature of the second heater and the heating temperature of the third heater are sequentially increased, the third heater conducts external source active heating, and the first heater and the second heater conduct heat recovery heat exchange type heating. The material sterilization system can effectively reduce the energy consumption of the material sterilization system.

Description

Technical Field

[0001] This invention relates to the field of food production technology, and in particular to a material sterilization system. Background Technology

[0002] In food production, high-temperature sterilization of liquid materials is a routine step. A common practice in high-temperature sterilization is staged heating. In the initial stage of this process, heat recovery devices are used to reheat the liquid materials in the first and second heaters, reducing the energy consumption of active heating. However, this method has drawbacks: it has specific requirements for the incoming temperature of the liquid materials, limiting its applicability. Only when the incoming material temperature is low can the heat recovery device effectively heat the material. When the incoming material temperature is high, no further heating is needed to reach the temperature of the first heating stage, meaning the energy recovered from sterilization heat recovery is not released, failing to achieve the designed thermal efficiency and increasing energy consumption. Summary of the Invention

[0003] In a first aspect, the present invention provides a material sterilization system, comprising a system inlet, a raw material heat recovery and heat exchange system, a first heater, a second heater, a third heater, a temperature holder, a sterilization heat recovery device, a cooling device, and a system outlet. The material is fed into the system inlet and passes sequentially through the raw material heat recovery and heat exchange system, the first heater, the second heater, the third heater, the temperature holder, the sterilization heat recovery device, the cooling device, and the system outlet. The raw material heat recovery heat exchange system includes a first heat exchanger and a cryogenic storage tank. The temperature of the heat exchange medium in the raw material heat recovery heat exchange system is lower than the temperature of the material entering the first heat exchanger. The cryogenic storage tank is used to store the heat exchange medium. The heating temperatures of the first heater, the second heater, and the third heater increase sequentially. The third heater is an external active heater, while the first and second heaters are heat recovery heat exchange heaters. The heat exchange medium inlet of the first heater is connected to the second port of the first three-way valve, the heat exchange medium inlet of the second heater is connected to the second port of the second three-way valve, the heat exchange medium outlet of the sterilization heat recovery device is connected to the first port of the second three-way valve, the heat exchange medium outlet of the second heater and the third port of the second three-way valve are both connected to the first port of the first three-way valve, and the heat exchange medium outlet of the first heater and the third port of the first three-way valve are both connected to the heat exchange medium inlet of the sterilization heat recovery device.

[0004] In an optional embodiment, the cryogenic storage tank of the raw material heat recovery heat exchange system includes a first cryogenic storage tank, the inlet of the first cryogenic storage tank is connected to the heat exchange medium outlet of the first heat exchanger, and the outlet of the first cryogenic storage tank is connected to the heat exchange medium inlet of the first heat exchanger.

[0005] In an optional embodiment, a second cryogenic storage tank is further included, which is connected in series with the first cryogenic storage tank. The outlet of the second cryogenic storage tank is connected to the inlet of the first cryogenic storage tank, and the outlet of the first cryogenic storage tank is connected to the heat exchange medium inlet of the first heat exchanger.

[0006] In an optional embodiment, the raw material heat recovery heat exchange system further includes a second heat exchanger, wherein the heat exchange medium outlet of the first heat exchanger is connected to the heat exchange medium inlet of the second heat exchanger, and the heat exchange medium outlet of the second heat exchanger is connected to the inlet of the storage tank and the heat exchange medium inlet of the first heat exchanger.

[0007] In an optional embodiment, the raw material heat recovery heat exchange system further includes a medium-temperature storage tank, the inlet of which is connected to the heat exchange medium outlet of the first heat exchanger.

[0008] In an optional embodiment, the raw material heat recovery heat exchange system further includes a fourth heater and a high-temperature storage tank, wherein the inlet of the fourth heater is connected to the outlet of the medium-temperature storage tank, and the outlet of the fourth heater is connected to the inlet of the high-temperature storage tank.

[0009] In an optional embodiment, the raw material heat recovery heat exchange system further includes a heat recovery tank, the inlet of which is connected to the heat exchange medium outlet of the first heat exchanger.

[0010] In an optional embodiment, the raw material heat recovery heat exchange system includes a fifth heater and a high-temperature storage tank. The inlet of the fifth heater is connected to the outlet of the heat recovery tank, and the outlet of the fifth heater is connected to the inlet of the high-temperature storage tank.

[0011] In an optional implementation, the heat exchange medium of the raw material heat recovery heat exchange system is water.

[0012] The material sterilization system provided by this invention has the following beneficial effects: 1. The present invention is provided with a first heater, a second heater and a third heater to heat the material in sequence, and the heating temperature of the first heater, the second heater and the third heater increases in sequence. The third heater is an external active heating, and the first heater and the second heater are heat recovery heat exchange heating. This configuration not only realizes the step heating of the material, but also reduces energy consumption by using heat recovery heat exchange heating. 2. The heat exchange medium for the first and second heaters comes from the sterilization heat recovery device. After the heat exchange medium cools down the material that has just come out of the temperature holder in the sterilization heat recovery device, the temperature of the heat exchange medium rises. At this time, part of the heat exchange medium enters the second heater directly through one outlet of the second three-way valve, raising the temperature of the material in the second heater to the set temperature and stabilizing the flow rate of the heat exchange medium. The remaining heat exchange medium enters the first heater through the other outlet of the second three-way valve, where it merges with the low-temperature medium flowing out of the second heater. After the heat exchange medium heats the material in the second heater, the temperature of the heat exchange medium decreases. This part of the medium also enters the first heater through the first three-way valve. Therefore, the temperature of the heat exchange medium entering the first heater is lower than the temperature of the heat exchange medium entering the second heater. This not only realizes the stepped heating of the first and second heaters, but also utilizes the heat energy of the sterilization heat recovery device, which can effectively reduce the system energy consumption. 3. The raw material heat recovery heat exchange system can exchange heat with the material entering from the system inlet, thereby lowering the material temperature. Then the material enters the first heater. After the material is heated by the heat recovery heat exchange in the first heater, the temperature of the heat exchange medium in the first heater decreases. The heat exchange medium then enters the sterilization heat recovery device. The lower temperature of the heat exchange medium can ensure the cooling effect of the sterilization heat recovery device on the high temperature material coming out of the temperature holder, thereby reducing the energy consumption of the subsequent cooling device. 4. The raw material heat recovery heat exchange system is equipped with a low-temperature storage tank for storing the heat exchange medium. The low-temperature storage tank can not only store the heat exchange medium, but also replenish the heat exchange medium, and can also use the heated heat exchange medium for other purposes, thereby making full use of the energy of the initial high temperature of the material. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the material sterilization system provided in Embodiment 1 of the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the overall structure of the material sterilization system provided in Embodiment 1 of the present invention; Figure 4 for Figure 3 A magnified view of a portion of point B in the middle.

[0015] Icons: 100 - System feed inlet; 200 - Raw material heat recovery heat exchange system; 210 - First heat exchanger; 220 - Second heat exchanger; 230 - Fourth heater; 240 - Fifth heater; 251 - First cryogenic storage tank; 252 - Second cryogenic storage tank; 260 - Medium temperature storage tank; 270 - High temperature storage tank; 280 - Heat recovery tank; 310 - First heater; 320 - Second heater; 330 - Third heater; 340 - First three-way valve; 350 - Second three-way valve; 400 - Temperature holder; 500 - Sterilization heat recovery device; 600 - Cooling device; 700 - System discharge outlet. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a material sterilization system, including a system inlet 100, a raw material heat recovery and heat exchange system 200, a first heater 310, a second heater 320, a third heater 330, a temperature holder 400, a sterilization heat recovery device 500, a cooling device 600, and a system outlet 700. The material is fed into the system through the system inlet 100 and passes sequentially through the raw material heat recovery and heat exchange system 200, the first heater 310, the second heater 320, the third heater 330, the temperature holder 400, the sterilization heat recovery device 500, the cooling device 600, and the system outlet 700. The raw material heat recovery heat exchange system 200 includes a first heat exchanger 210 and a cryogenic storage tank. The temperature of the heat exchange medium in the raw material heat recovery heat exchange system 200 is lower than the temperature of the material entering the first heat exchanger 210. The cryogenic storage tank is used to store the heat exchange medium. The heating temperatures of the first heater 310, the second heater 320, and the third heater 330 increase sequentially. The third heater 330 is an external active heater, while the first heater 310 and the second heater 320 are heat recovery and heat exchange heaters. The heat exchange medium inlet of the first heater 310 is connected to the second port of the first three-way valve 340, the heat exchange medium inlet of the second heater 320 is connected to the second port of the second three-way valve 350, the heat exchange medium outlet of the sterilization heat recovery device 500 is connected to the first port of the second three-way valve 350, the heat exchange medium outlet of the second heater 320 and the third port of the second three-way valve 350 are both connected to the first port of the first three-way valve 340, and the heat exchange medium outlet of the first heater 310 and the third port of the first three-way valve 340 are both connected to the heat exchange medium inlet of the sterilization heat recovery device 500.

[0024] like Figure 1 As shown, in this embodiment, the first heater 310, the second heater 320, and the third heater 330 heat the material sequentially, and the heating temperatures of the first heater 310, the second heater 320, and the third heater 330 increase sequentially. The third heater 330 is an external active heating source, while the first heater 310 and the second heater 320 are heat recovery heat exchange heating sources. This configuration achieves both stepped heating of the material and reduces energy consumption by utilizing heat recovery heat exchange heating.

[0025] The heat exchange medium for the first heater 310 and the second heater 320 comes from the sterilization heat recovery device 500. After the heat exchange medium cools the material that has just come out of the temperature holder 400 in the sterilization heat recovery device 500, the temperature of the heat exchange medium rises. At this time, part of the heat exchange medium enters the second heater 320 directly through one outlet of the second three-way valve 350, raising the temperature of the material in the second heater 320 to the set temperature and stabilizing the flow rate of the heat exchange medium. The remaining heat exchange medium is combined with the material from the second heater 320 through the other outlet of the second three-way valve 350. The low-temperature medium flowing out of 320 enters the first heater 310. After the heat exchange medium heats the material in the second heater 320, the temperature of the heat exchange medium decreases. This part of the medium also enters the first heater 310 through the first three-way valve 340. Therefore, the temperature of the heat exchange medium entering the first heater 310 is lower than the temperature of the heat exchange medium entering the second heater 320. This not only realizes the stepped heating of the first heater 310 and the second heater 320, but also utilizes the heat energy of the sterilization heat recovery device 500, which can effectively reduce the system energy consumption.

[0026] The raw material heat recovery heat exchange system 200 can exchange heat with the material entering from the system inlet 100, lowering the material's temperature. The material then enters the first heater 310, where it undergoes heat recovery heating. The temperature of the heat exchange medium within the first heater 310 decreases, and then the medium enters the sterilization heat recovery device 500. The lower temperature of the heat exchange medium more effectively cools the high-temperature material exiting the temperature holder 400, thus reducing the energy consumption of the subsequent cooling device 600. However, if the material enters the first heater 310 directly at a higher temperature, the temperature of the heat exchange medium within the first heater 310 cannot be lowered, and the temperature of the heat exchange medium in the sterilization heat recovery device 500 will also remain high. In this case, the cooling effect on the high-temperature material is poor, and the cooling device 600 needs to operate at high energy consumption to lower the material temperature to the preset discharge temperature.

[0027] Therefore, by adding the raw material heat recovery heat exchange system 200 to exchange heat with the material, the feeding temperature of the material can be maintained at a lower temperature. This can optimize the circulation of the first heater 310, the second heater 320, and the sterilization heat recovery device 500, and maintain the cooling device 600 at a lower energy consumption, thereby improving the energy efficiency of the entire system.

[0028] In addition, the raw material heat recovery heat exchange system 200 is equipped with a cryogenic storage tank for storing the heat exchange medium. The cryogenic storage tank can not only store the heat exchange medium, but also replenish the heat exchange medium, and can also use the heated heat exchange medium for other purposes, thereby making full use of the energy of the initial high temperature of the material.

[0029] Specifically, in this embodiment, the first three-way valve 340 and the second three-way valve 350 can be proportional control three-way valves, thereby adjusting the flow rate of the heat exchange medium according to the heating requirements of the first heater 310 and the second heater 320. In particular, when the incoming material temperature is different, the opening of the first three-way valve 340 and the second three-way valve 350 can be adjusted according to the incoming material temperature, thereby accurately controlling the ratio of the heat exchange medium that directly enters the first three-way valve 340 through the second three-way valve 350 and the heat exchange medium that has cooled down after heat exchange in the second heater 320. The temperature of the heat exchange medium in the first heater 310 can be adjusted according to the incoming material temperature, thereby achieving a better heating effect of the first heater 310 and ensuring that the temperature of the heat exchange medium after passing through the first heater 310 is at a lower temperature, thus ensuring the heat exchange effect of the sterilization heat recovery device 500. Furthermore, by controlling the opening degree of the first three-way valve 340, the ratio of the heat exchange medium entering the first heater 310 to the heat exchange medium flowing directly from the first three-way valve 340 to the sterilization heat recovery device 500 can also be controlled. The heat exchange medium flowing directly from the first three-way valve 340 to the sterilization heat recovery device 500 will mix with the heat exchange medium flowing from the first heater 310 to the sterilization heat recovery device 500, thereby adjusting the temperature of the heat exchange medium entering the sterilization heat recovery device 500.

[0030] In other embodiments, the above-mentioned heat exchange medium flow rate can also be achieved by other methods, such as setting more bypass structures or using more flow valves, and this application does not limit this.

[0031] In this embodiment, the cooling device 600 is configured in two stages, including a tower water pipe and an ice water pipe installed sequentially, to gradually cool the material flowing out of the sterilization heat recovery device 500, so that the material reaches the required process temperature, and then flows out through the system outlet 700. The system outlet 700 can be connected to a storage device such as an aseptic tank. If the material entering from the system feed inlet 100 is at a high temperature, the heat exchange of the first heater 310 will be less when the raw material heat recovery heat exchange system 200 is not set up. This will result in a higher temperature of the heat exchange medium flowing into the sterilization heat recovery device 500. At this time, the sterilization heat recovery device 500 cannot fully recover heat from the material. The temperature of the material flowing from the sterilization heat recovery device 500 to the tower water pipe is still too high, which will further lead to insufficient cooling effect of the tower water pipe on the material. Since the temperature of the material when it exits the entire material sterilization system needs to reach the set temperature, the chilled water pipe is required to cool the material at a higher temperature to the set temperature, which will lead to an increase in the energy consumption of the ice-making and cooling system associated with the chilled water pipe. By setting up the raw material heat recovery and heat exchange system 200, the material can always be kept at a low temperature when it enters the first heater 310, thereby ensuring that the first heater 310 can perform sufficient heat exchange, reducing the temperature of the heat exchange medium returning to the sterilization heat recovery device 500, ensuring the cooling effect of the sterilization heat recovery device 500 on high-temperature materials, and thus reducing the energy consumption of the cooling device 600.

[0032] In other embodiments, the cooling device 600 may also adopt other specific structures. Since the material sterilization system needs to control the discharge temperature of the material, other specific cooling devices 600 can also achieve the effect of reducing energy consumption.

[0033] Specifically, in this embodiment, the third heater 330 can use external steam heat energy to heat circulating hot water, and then use the heated hot water to heat the material. Heating the material with hot water is relatively more stable and allows for more accurate temperature control. In other embodiments, the third heater 330 can also use methods such as electric heating or steam heating.

[0034] like Figure 2As shown, in this embodiment, the cryogenic storage tank of the raw material heat recovery heat exchange system 200 includes a first cryogenic storage tank 251. The inlet of the first cryogenic storage tank 251 is connected to the heat exchange medium outlet of the first heat exchanger 210, and the outlet of the first cryogenic storage tank 251 is connected to the heat exchange medium inlet of the first heat exchanger 210. It also includes a second cryogenic storage tank 252 connected in series with the first cryogenic storage tank 251. The outlet of the second cryogenic storage tank 252 is connected to the inlet of the first cryogenic storage tank 251, and the outlet of the first cryogenic storage tank 251 is connected to the heat exchange medium inlet of the first heat exchanger 210. The raw material heat recovery heat exchange system 200 also includes a heat recovery tank 280, the inlet of which is connected to the heat exchange medium outlet of the first heat exchanger 210. The raw material heat recovery heat exchange system 200 includes a fifth heater 240 and a high-temperature storage tank 270. The inlet of the fifth heater 240 is connected to the outlet of the heat recovery tank 280, and the outlet of the fifth heater 240 is connected to the inlet of the high-temperature storage tank 270.

[0035] The second cryogenic storage tank 252 can serve as a buffer tank for heat recovery in the entire raw material heat recovery and heat exchange system 200. A certain liquid level difference is maintained between the first cryogenic storage tank 251 and the second cryogenic storage tank 252 to buffer the overflow caused by the time difference during the production process.

[0036] like Figure 2 As shown, the heated heat exchange medium flowing out of the first heat exchanger 210 can enter either the first low-temperature storage tank 251 or the heat recovery tank 280. The heated heat exchange medium in the heat recovery tank 280 is then heated to a high temperature by the fifth heater 240 and can be stored in the high-temperature storage tank 270 for other uses. In this embodiment, the heat exchange medium of the raw material heat recovery heat exchange system 200 is water. After being heated by the fifth heater 240, the high-temperature storage tank 270 stores hot water. Hot water has wide applications in production systems. This embodiment can fully utilize the heat obtained from the material by the raw material heat recovery heat exchange system 200 and use it for water heating, thereby improving the supply of hot water in the production system and reducing the energy consumption for producing hot water.

[0037] In other embodiments, the heat exchange medium may also be other widely used materials that require heating, and this application does not impose any restrictions.

[0038] This embodiment also provides a material sterilization method, based on the material sterilization system of this embodiment, including the following steps: After the material is fed through the system feed inlet 100, it is cooled down by the first heat exchanger 210 of the raw material heat recovery heat exchange system 200. Then the material is heated by the first heater 310, the second heater 320 and the third heater 330 in sequence. After that, the material enters the temperature holder 400 for heat preservation and sterilization. After that, the material passes through the sterilization heat recovery device 500 and the cooling device 600 in sequence and is discharged through the system discharge outlet 700. The third heater 330 maintains the set temperature through external active heating. The heat exchange medium in the sterilization heat recovery device 500 is heated by the high-temperature material coming out of the temperature holder 400 and then flows through the first port of the second three-way valve 350. Part of the heat exchange medium enters the heat exchange medium inlet of the second heater 320 through the second port of the second three-way valve 350 to heat the material and then flows out from the heat exchange medium outlet of the second heater 320 and enters the first port of the first three-way valve 340. Another part of the heat exchange medium directly enters the first port of the first three-way valve 340 through the third port of the second three-way valve 350. Part of the heat exchange medium enters the heat exchange medium inlet of the first heater 310 from the second port of the second three-way valve 350 to heat the material and then flows out from the outlet of the first heater and enters the heat exchange medium inlet of the sterilization heat recovery device 500. Another part of the heat exchange medium directly enters the heat exchange medium inlet of the sterilization heat recovery device 500 from the third port of the second three-way valve 350. The heat exchange medium of the first heat exchanger 210 of the raw material heat recovery heat exchange system 200 is heated by the material and enters the inlet of the storage tank and enters the first heat exchanger 210 from the outlet of the storage tank.

[0039] This method uses a first heater 310, a second heater 320, and a third heater 330 to heat the material sequentially. The heating temperatures of the first heater 310, the second heater 320, and the third heater 330 increase sequentially. The third heater 330 is an external active heating source, while the first heater 310 and the second heater 320 are heat recovery and heat exchange heating sources. This configuration achieves both stepped heating of the material and reduces energy consumption by utilizing heat recovery and heat exchange heating. In this method, the heat exchange medium of the first heater 310 and the second heater 320 comes from the sterilization heat recovery device 500. After the heat exchange medium cools down the material that has just come out of the temperature holder 400 in the sterilization heat recovery device 500, the temperature of the heat exchange medium rises. At this time, part of the heat exchange medium directly enters the second heater 320, and the other part enters the first heater 310 through the first three-way valve 340. After the heat exchange medium heats the material in the second heater 320, the temperature of the heat exchange medium decreases. This part of the medium also enters the first heater 310 through the first three-way valve 340. Therefore, the temperature of the heat exchange medium entering the first heater 310 is lower than the temperature of the heat exchange medium entering the second heater 320. This not only realizes the stepped heating of the first heater 310 and the second heater 320, but also utilizes the heat energy of the sterilization heat recovery device 500, which can effectively reduce the system energy consumption. In this method, the raw material heat recovery heat exchange system 200 can exchange heat with the material entering from the system inlet 100, thereby lowering the material temperature. Then, the material enters the first heater 310. After the material is heated by heat recovery heat exchange in the first heater 310, the temperature of the heat exchange medium in the first heater 310 decreases. The heat exchange medium then enters the sterilization heat recovery device 500. The lower temperature of the heat exchange medium ensures the cooling effect of the sterilization heat recovery device 500 on the high-temperature material coming out of the temperature holder 400, thereby reducing the energy consumption of the subsequent cooling device 600.

[0040] Example 2 like Figure 3 and Figure 4 As shown, the main content of this embodiment is the same as that of Embodiment 1, with the following differences in the raw material heat recovery heat exchange system 200: The raw material heat recovery heat exchange system 200 further includes a second heat exchanger 220. The heat exchange medium outlet of the first heat exchanger 210 is connected to the heat exchange medium inlet of the second heat exchanger 220, and the heat exchange medium outlet of the second heat exchanger 220 is connected to the inlet of the storage tank and the heat exchange medium inlet of the first heat exchanger 210. The raw material heat recovery heat exchange system 200 also includes a medium-temperature storage tank 260, and the inlet of the medium-temperature storage tank 260 is connected to the heat exchange medium outlet of the first heat exchanger 210. The raw material heat recovery heat exchange system 200 further includes a fourth heater 230 and a high-temperature storage tank 270. The inlet of the fourth heater 230 is connected to the outlet of the medium-temperature storage tank 260, and the outlet of the fourth heater 230 is connected to the inlet of the high-temperature storage tank 270.

[0041] In this embodiment, the heat exchange medium heated by the first heat exchanger 210 can enter either the medium-temperature storage tank 260 or the second heat exchanger 220.

[0042] The heat exchange medium entering the intermediate-temperature storage tank 260 can be further heated into a high-temperature medium by the fourth heater 230. For example, when the heat exchange medium is water, hot water can be obtained through the fourth heater 230. The high-temperature medium is stored in the high-temperature storage tank 270 and can be used for other purposes. Therefore, through the intermediate-temperature storage tank 260, the fourth heater 230, and the high-temperature storage tank 270, the heat of the high-temperature material can be fully utilized, reducing the energy consumption for manufacturing the high-temperature medium.

[0043] Another portion of the heat exchange medium enters the second heat exchanger 220, where it is cooled before being output to the first heat exchanger 210 or a cryogenic storage tank. This effectively reduces the temperature of the heat exchange medium returning to the first heat exchanger 210, ensuring the cooling effect of the raw material heat recovery heat exchange system 200 on high-temperature materials.

[0044] In this embodiment, the cryogenic storage tank can also provide heat exchange medium to the first heat exchanger 210, and the heat exchange medium in the cryogenic storage tank is cooled by the second heat exchanger 220.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material sterilization system, characterized in that, The system includes a system feed inlet (100), a raw material heat recovery heat exchange system (200), a first heater (310), a second heater (320), a third heater (330), a temperature holder (400), a sterilization heat recovery device (500), a cooling device (600), and a system discharge outlet (700). The material is fed through the system feed inlet (100) and passes through the raw material heat recovery heat exchange system (200), the first heater (310), the second heater (320), the third heater (330), the temperature holder (400), the sterilization heat recovery device (500), the cooling device (600), and the system discharge outlet (700) in sequence. The raw material heat recovery heat exchange system (200) includes a first heat exchanger (210) and a low-temperature storage tank. The temperature of the heat exchange medium in the raw material heat recovery heat exchange system (200) is lower than the temperature of the material entering the first heat exchanger (210). The low-temperature storage tank is used to store the heat exchange medium. The heating temperatures of the first heater (310), the second heater (320), and the third heater (330) increase sequentially. The third heater (330) is an external active heating source, while the first heater (310) and the second heater (320) are heat recovery heat exchange heating sources. The heat exchange medium inlet of the first heater (310) is connected to the second port of the first three-way valve (340), and the heat exchange medium inlet of the second heater (320) is connected to the second port of the second three-way valve (350). The heat exchange medium outlet of the sterilization heat recovery device (500) is connected to the first port of the second three-way valve (350). The heat exchange medium outlet of the second heater (320) and the third port of the second three-way valve (350) are both connected to the first port of the first three-way valve (340). The heat exchange medium outlet of the first heater (310) and the third port of the first three-way valve (340) are both connected to the heat exchange medium inlet of the sterilization heat recovery device (500).

2. The material sterilization system according to claim 1, characterized in that, The cryogenic storage tank of the raw material heat recovery heat exchange system (200) includes a first cryogenic storage tank (251), the inlet of the first cryogenic storage tank (251) is connected to the heat exchange medium outlet of the first heat exchanger (210), and the outlet of the first cryogenic storage tank (251) is connected to the heat exchange medium inlet of the first heat exchanger (210).

3. The material sterilization system according to claim 2, characterized in that, It also includes a second cryogenic storage tank (252) connected in series with the first cryogenic storage tank (251), the outlet of the second cryogenic storage tank (252) is connected to the inlet of the first cryogenic storage tank (251), and the outlet of the first cryogenic storage tank (251) is connected to the heat exchange medium inlet of the first heat exchanger (210).

4. The material sterilization system according to claim 1, characterized in that, The raw material heat recovery heat exchange system (200) further includes a second heat exchanger (220), the heat exchange medium outlet of the first heat exchanger (210) is connected to the heat medium inlet of the second heat exchanger (220), and the heat medium outlet of the second heat exchanger (220) is connected to the inlet of the storage tank and the heat exchange medium inlet of the first heat exchanger (210).

5. The material sterilization system according to claim 4, characterized in that, The raw material heat recovery heat exchange system (200) also includes a medium-temperature storage tank (260), the inlet of which is connected to the heat exchange medium outlet of the first heat exchanger (210).

6. The material sterilization system according to claim 5, characterized in that, The raw material heat recovery heat exchange system (200) further includes a fourth heater (230) and a high-temperature storage tank (270). The inlet of the fourth heater (230) is connected to the outlet of the medium-temperature storage tank (260), and the outlet of the fourth heater (230) is connected to the inlet of the high-temperature storage tank (270).

7. The material sterilization system according to claim 1, characterized in that, The raw material heat recovery heat exchange system (200) also includes a heat recovery tank (280), the inlet of which is connected to the heat exchange medium outlet of the first heat exchanger (210).

8. The material sterilization system according to claim 7, characterized in that, The raw material heat recovery heat exchange system (200) includes a fifth heater (240) and a high-temperature storage tank (270). The inlet of the fifth heater (240) is connected to the outlet of the heat recovery tank (280), and the outlet of the fifth heater (240) is connected to the inlet of the high-temperature storage tank (270).

9. The material sterilization system according to any one of claims 1-8, characterized in that, The heat exchange medium of the raw material heat recovery heat exchange system (200) is water.

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