Pasteurization system

Abstract

The utility model relates to a pasteurization system, and belongs to the technical field of pasteurization. The system comprises a milk cylinder, a refrigerating machine and a first heat exchanger, wherein a first medium cavity of the first heat exchanger is communicated with an exhaust end of the refrigerating machine; a first medium cavity of the second heat exchanger is communicated with the milk cylinder; a sterilization cavity of the pasteurization device is communicated with a first medium cavity of the second heat exchanger; the first water path structure sequentially flows through a second medium cavity of the first heat exchanger and a second medium cavity of the second heat exchanger; and the milk source sequentially flows through the first medium cavity of the second heat exchanger and the sterilization cavity. According to the pasteurization system, the waste heat generated by the refrigerating machine is collected through the first heat exchanger, and the temperature of the milk source is increased by utilizing the waste heat, so that the heat exchange efficiency of pasteurization is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of pasteurization, and in particular to a pasteurization system. Background Art

[0002] After pasteurization, bovine colostrum can reduce pathogenic microorganisms such as Salmonella and Escherichia coli in the colostrum, improve the calf's absorption efficiency of immunoglobulin G in the colostrum, and ensure that the calf has sufficient antibodies to resist external diseases during its infancy.

[0003] In the existing pasteurization machine, the heat sterilization of bovine colostrum is achieved by an internally installed hot and cold exchanger. When the low-temperature refrigerated bovine colostrum is sterilized by heat exchange, the temperature of the bovine colostrum during heat exchange is significantly different from the heat medium temperature of the heat exchanger, and a large amount of heat medium is required to make the bovine colostrum reach the sterilization temperature. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present application provides a pasteurization system, which uses a first heat exchanger to collect waste heat from a refrigerator and exchanges heat with a milk source. During pasteurization, heat exchange and sterilization can be completed with less heat medium, effectively reducing energy consumption and carbon emissions.

[0005] The first aspect of the present application provides a pasteurization system, comprising a milk tank and a refrigerator, wherein the refrigerator is used to perform low-temperature treatment on a milk source in the milk tank, and the pasteurization system further comprises:

[0006] A first heat exchanger, wherein a first medium chamber of the first heat exchanger is in communication with an exhaust end of the refrigerator;

[0007] a second heat exchanger, wherein a first medium chamber of the second heat exchanger is in communication with the milk tank;

[0008] a pasteurization device, wherein the sterilization chamber of the pasteurization device is in communication with the first medium chamber of the second heat exchanger;

[0009] a first water channel structure, wherein the first water channel structure flows through the second medium cavity of the first heat exchanger and the second medium cavity of the second heat exchanger in sequence;

[0010] The milk source flows through the first medium chamber and the sterilization chamber of the second heat exchanger in sequence.

[0011] In the pasteurization workflow, the refrigerator is started to perform low-temperature treatment on the milk source in the milk tank, the waste heat air at the exhaust end of the refrigerator flows through the first medium cavity of the first heat exchanger, the first water channel structure flows through the second medium cavity of the first heat exchanger to exchange heat with the waste heat air, the first water channel structure after the heat exchange flows through the second medium cavity of the second heat exchanger, and exchanges heat with the milk source flowing through the first medium cavity of the second heat exchanger to increase the temperature of the milk source, the heated milk source flows into the pasteurization device for heat exchange sterilization, and the temperature of the milk source is increased by waste heat, which can reduce the energy demand for heat exchange sterilization and reduce carbon emissions.

[0012] In some embodiments, the pasteurization system further includes a third heat exchanger, the first medium chamber of the third heat exchanger is respectively connected to the first medium chamber of the second heat exchanger and the sterilization chamber, the second medium chamber of the third heat exchanger is connected to the sterilization chamber, and the milk source flows through the first medium chamber of the second heat exchanger, the first medium chamber of the third heat exchanger, the sterilization chamber, and the second medium chamber of the third heat exchanger in sequence.

[0013] That is, in the implementation mode of the present application, the residual heat of the pasteurized milk source is utilized to perform heat exchange with the milk source to be sterilized in the third heat exchanger, so as to further increase the temperature of the milk source to be sterilized.

[0014] In some embodiments, the first waterway structure comprises:

[0015] A first tank body, wherein the first tank body is respectively connected to an outlet end of the second medium cavity of the first heat exchanger and an inlet end of the second medium cavity of the second heat exchanger;

[0016] a second tank body, the second tank body being communicated with an inlet end of the second medium cavity of the first heat exchanger and an outlet end of the second medium cavity of the second heat exchanger respectively;

[0017] a first water pump, disposed on a pipe connecting the second tank and the first heat exchanger;

[0018] The second water pump is arranged on a pipeline connecting the first tank and the second heat exchanger.

[0019] The first tank stores hot water that exchanges heat with the waste heat of the refrigerator, and the second tank stores water that completes heat exchange in the second heat exchanger, isolating the water to be exchanged and the water that has been exchanged, thereby ensuring the stability of the heat exchange efficiency of the second heat exchanger.

[0020] In some embodiments, a first regulating valve is provided at the outlet end of the second medium chamber of the first heat exchanger, and the first regulating valve is used to control the on / off and flow rate of the second medium chamber of the first heat exchanger.

[0021] In some embodiments, a first temperature sensor is further provided at the outlet end of the second medium chamber of the first heat exchanger, and the first temperature sensor measures the outlet water temperature of the first heat exchanger. The opening of the first regulating valve can be adjusted according to the measurement result of the first temperature sensor.

[0022] In some embodiments, a second regulating valve is provided at the outlet end of the second medium chamber of the third heat exchanger, and the second regulating valve is used to control the on-off and flow rate of the second medium chamber of the third heat exchanger.

[0023] In some embodiments, a second temperature sensor is further provided at the outlet end of the second medium cavity of the third heat exchanger, and the second temperature sensor measures the milk outlet temperature of the third heat exchanger. The opening of the second regulating valve can be adjusted according to the measurement result of the second temperature sensor.

[0024] In some embodiments, the pasteurization device further comprises a second water channel structure, and the second water channel structure flows through the heat exchange chamber of the pasteurization device.

[0025] In some embodiments, an electrically heated hot water tank and a third water pump, the electrically heated hot water tank is connected to the inlet end of the heat exchange chamber through the second water pump, and the electrically heated hot water tank is connected to the outlet end of the heat exchange chamber.

[0026] The technical solution provided by this application may have the following beneficial effects:

[0027] The present application provides a pasteurization system, including a milk tank, a refrigerator, a first heat exchanger, a second heat exchanger, a pasteurization device and a first water channel structure. The sterilization process is as follows: after the milk source is stored in the milk tank, the refrigerator is started to perform low-temperature treatment on the milk source in the milk tank, and the temperature of the milk source is maintained at a relatively low temperature by the refrigerator. The waste heat air discharged by the refrigerator flows through the first medium cavity of the first heat exchanger and performs heat exchange with the water in the second medium cavity of the second heat exchanger. The water after heat exchange flows through the second medium cavity of the second heat exchanger and performs heat exchange with the milk source flowing through the first medium cavity of the second heat exchanger. After the temperature is increased, the milk source flows through the sterilization cavity of the pasteurization device for sterilization treatment. The pasteurization system provided in the present application utilizes the waste heat of the refrigerator to perform heat exchange on the milk source, thereby reducing the temperature difference between the milk source and the heat medium in the pasteurization device, thereby improving the heat exchange sterilization efficiency of the pasteurization system, avoiding the situation where the hot water is insufficient to heat the milk source to the sterilization temperature range due to the milk source temperature being too low, and no additional equipment is required to heat the milk source, which can reduce the energy consumption level of heat exchange sterilization and reduce carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0029] Figure 1 is a schematic structural diagram of a pasteurization system shown in an embodiment of the present application;

[0030] Figure 2 It is another structural schematic diagram of the pasteurization system shown in the embodiment of the present application. Description of the drawings:

[0032] 1. Milk tank; 11. Milk pump;

[0033] 2. Refrigerator;

[0034] 3. First heat exchanger; 31. First regulating valve; 32. First temperature sensor;

[0035] 4. Second heat exchanger;

[0036] 5. third heat exchanger; 51. second regulating valve; 52. second temperature sensor;

[0037] 6. Pasteurization device; 61. Electric heating hot water tank; 62. Third water pump; 63. Heat exchanger;

[0038] 7. First water channel structure; 71. First tank body; 72. Second tank body; 73. First water pump; 74. Second water pump;

[0039] 8. Transfer cylinder. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0041] In the existing pasteurization machine, the heat sterilization of bovine colostrum is achieved by an internally installed hot and cold exchanger. When the low-temperature refrigerated bovine colostrum is sterilized by heat exchange, a large amount of energy is required to make the bovine colostrum reach the sterilization temperature due to the large difference between the temperature of the bovine colostrum and the temperature of the hot and cold exchanger.

[0042] In response to the above problems, an embodiment of the present application provides a pasteurization system, which collects waste heat generated by a refrigerator through a first heat exchanger, and uses the waste heat to obtain hot water for heat exchange with a milk source, thereby increasing the temperature of the milk source, thereby improving the heat exchange efficiency of pasteurization and reducing energy consumption.

[0043] The technical solutions of specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] See also Figure 1 and Figure 2 A pasteurization system provided in an embodiment of the present application comprises a milk tank 1 and a refrigerator 2, wherein the refrigerator 2 is used to perform low-temperature treatment on the milk source in the milk tank 1. The pasteurization system further comprises:

[0045] A first heat exchanger 3, wherein a first medium chamber of the first heat exchanger 3 is connected to an exhaust end of the refrigerator 2;

[0046] A second heat exchanger 4, wherein a first medium chamber of the second heat exchanger 4 is in communication with the milk tank 1;

[0047] a pasteurization device 6, wherein the pasteurization chamber of the pasteurization device 6 is in communication with the first medium chamber of the second heat exchanger 4;

[0048] A first water channel structure 7, wherein the first water channel structure 7 flows through the second medium cavity of the first heat exchanger 3 and the second medium cavity of the second heat exchanger 4 in sequence;

[0049] The milk source flows through the first medium chamber and the sterilization chamber of the second heat exchanger 4 in sequence.

[0050] In the prior art, effective sterilization can be achieved by heat exchange through the hot and cold exchanger set inside the pasteurizer, and the sterilized milk source can be cooled by cold exchange, and the temperature is generally 3 to 4°C, so as to ensure the quality of the milk source. A large amount of electricity is consumed in the process of hot and cold exchange. Compared with the traditional pasteurization system, the pasteurization system of this embodiment collects the waste heat generated by the refrigerator 2 by setting a first heat exchanger 3, and uses the hot water obtained by the waste heat in the second heat exchanger 4 to exchange heat with the milk source, so as to increase the temperature of the milk source, for example, to 20 to 30°C. The milk source at this temperature can be pasteurized in the next step with lower energy consumption.

[0051] In order to improve the utilization of waste heat of the pasteurization system, the present embodiment further designs a third heat exchanger 5, through which the pasteurized high-temperature milk source and the to-be-sterilized milk source are heat exchanged. Preferably, the pasteurization system in the present embodiment further includes a third heat exchanger 5, wherein the first medium cavity of the third heat exchanger 5 is respectively connected with the first medium cavity of the second heat exchanger 4 and the sterilization cavity of the pasteurization device 6, and the second medium cavity of the third heat exchanger 5 is connected with the sterilization cavity of the pasteurization device 6, and the milk source flows through the first medium cavity of the second heat exchanger 4, the first medium cavity of the third heat exchanger 5, the sterilization cavity of the pasteurization device 6 and the second medium cavity of the third heat exchanger 5 in sequence.

[0052] By setting up a third heat exchanger and connecting the second heat exchanger and the pasteurization device, a milk passage is formed. After the milk source in the milk tank flows through the second heat exchanger, the temperature of the milk source rises to 20-30°C, and then flows through the first medium chamber of the third heat exchanger to exchange heat with the pasteurized milk source in the previous process flowing through the second medium chamber of the third heat exchanger, so as to further heat the milk source. At the same time, the pasteurized milk source is cooled to 40°C through heat exchange in the third heat exchanger, and is stored in the external transfer cylinder 8 and transferred to the feeding area to feed the calves. The third heat exchanger 5 provided in the present application can save the system for cooling the sterilized milk source in the original pasteurizer, and there is no need to cool the pasteurized milk source, thereby effectively reducing energy consumption.

[0053] The pasteurization temperature of the pasteurization device in the embodiment of the present application is 75° C. to 90° C., and the sterilization time is 15 to 20 seconds, that is, the time for the milk source to be sterilized to flow from the inlet end of the sterilization chamber in the pasteurization device to the outlet end is 15 to 20 seconds.

[0054] For example, in order to illustrate the beneficial effects of the embodiments of the present application in detail, 1000 kg of milk source is processed at a time, water is used as the medium for heat exchange, the pasteurization temperature is set to 80°C, the hot water used for pasteurization is 90°C, and under the condition of no loss, the temperature of the milk source is 4°C, the specific heat capacity is 2.5x10 3 J / (kg·℃), the temperature of the milk source for heat exchange through the second heat exchanger 4 is 25℃, the temperature of the milk source for heat exchange through the third heat exchanger 5 is 40℃, and the specific heat capacity of water is 3.6x10 3 J / (kg·°C) will be described.

[0055] When pasteurizing the milk source in the milk tank 1 directly, the amount of hot water required to heat 100 kg of milk source to 80°C is about 530 kg;

[0056] The amount of hot water required to heat 100 kg of milk source to 80° C. using the second heat exchanger 4 in the embodiment of the present application for heat exchange is about 450 kg;

[0057] The amount of hot water required to heat 100 kg of milk source to 65° C. using the second heat exchanger 4 and the third heat exchanger 5 in the embodiment of the present application for heat exchange is 280 kg.

[0058] It can be seen that by using the waste heat generated by the refrigerator 2 and the pasteurized milk source to heat the milk source in sequence, the amount of hot water required for pasteurization can be greatly reduced, thereby achieving energy conservation and emission reduction.

[0059] In this embodiment, the first water channel structure 7 includes:

[0060] A first tank body 71, wherein the first tank body 71 is connected to an outlet end of the second medium cavity of the first heat exchanger 3 and an inlet end of the second medium cavity of the second heat exchanger 4 respectively;

[0061] A second tank body 72, wherein the second tank body 72 is respectively connected to an inlet end of the second medium cavity of the first heat exchanger 3 and an outlet end of the second medium cavity of the second heat exchanger 4;

[0062] A first water pump 73 is provided on a pipeline connecting the second tank 72 and the first heat exchanger 3;

[0063] The second water pump 74 is disposed on a pipe connecting the first tank 71 and the second heat exchanger 4 .

[0064] Specifically, the waste heat air generated by the refrigerator 1 is stored in the first tank body 71 after heat exchange with water in the first heat exchanger 3. The first tank body 71 supplies hot water to the second heat exchanger 4, and the warm water after heat exchange in the second heat exchanger 4 is transported to the second tank body 72, and the first water pump 73 transports the warm water to the first heat exchanger 3. The first tank body 71, the second tank body 72, the first water pump 73 and the second water pump 74 form the first water circuit structure 7 in this embodiment. The circulating water circuit can ensure that the hot water used for heat exchange can be maintained in a reasonable temperature range, so that the circulating heat exchange work can be carried out at the set temperature, thereby improving the sterilization efficiency of pasteurization.

[0065] Preferably, in order to ensure that the hot water temperature of the first heat exchanger 3 meets the preset requirements, a first regulating valve 31 is provided at the outlet end of the second medium chamber of the first heat exchanger 3, and the first regulating valve 31 is used to control the on-off and flow rate of the second medium chamber of the first heat exchanger 3.

[0066] Preferably, a first temperature sensor 32 is further provided at the outlet end of the second medium cavity of the first heat exchanger 3, and the first temperature sensor 32 measures the outlet water temperature of the first heat exchanger 3. The opening of the first regulating valve 31 can be adjusted according to the measurement result of the first temperature sensor 32. When the water temperature at the outlet end of the second medium cavity of the first heat exchanger 3 is lower than a preset value, such as 20°C, 22°C, 25°C, 26°C, or 30°C, the first regulating valve 31 reduces the water flow rate flowing through the first heat exchanger 3, and vice versa, increases the water flow rate flowing through the first heat exchanger 3.

[0067] Preferably, a second regulating valve 51 is provided at the outlet end of the second medium cavity of the third heat exchanger 5, and the second regulating valve 51 is used to control the on-off and flow rate of the second medium cavity of the third heat exchanger 5. The milk source flow rate in the third heat exchanger 5 is adjusted by the second regulating valve 51, thereby controlling the heat exchange of the two milk sources in the third heat exchanger 5.

[0068] Specifically, a second temperature sensor 52 is further provided at the outlet end of the second medium cavity of the third heat exchanger 5. The second temperature sensor 52 measures the outlet milk temperature of the third heat exchanger 5. The opening of the second regulating valve 51 can be adjusted according to the measurement result of the second temperature sensor 52. The outlet milk temperature of the pasteurized milk source after heat exchange from the third heat exchanger 5 is monitored by the second temperature sensor 52, for example, 40° C. When the temperature of the milk source is higher than 40° C., the flow rate of the pasteurized milk source flowing through the third heat exchanger 51 is reduced by the second regulating valve 51, and vice versa, the flow rate of the pasteurized milk source flowing through the third heat exchanger 5 is increased.

[0069] Preferably, in order to facilitate obtaining a heating cycle for heat exchange sterilization, the pasteurization device 6 also includes a second water path structure (not shown), and the second water path structure flows through the heat exchange chamber of the pasteurization device. More preferably, the pasteurization device 6 includes an electrically heated hot water tank 61, a second water pump 62 and a heat exchanger 63, wherein the heat exchanger 63 has the sterilization chamber and the heat exchange chamber, the electrically heated hot water tank 61 is connected to the inlet end of the heat exchange chamber through the second water pump 62, and the electrically heated hot water tank 61 is connected to the outlet end of the heat exchange chamber.

[0070] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A pasteurization system, comprising a milk tank and a refrigerator, wherein the refrigerator is used to perform low temperature treatment on the milk source in the milk tank, characterized in that: The pasteurization system further comprises: A first heat exchanger, wherein a first medium chamber of the first heat exchanger is in communication with an exhaust end of the refrigerator; a second heat exchanger, wherein a first medium chamber of the second heat exchanger is in communication with the milk tank; a pasteurization device, wherein the sterilization chamber of the pasteurization device is in communication with the first medium chamber of the second heat exchanger; a first water channel structure, wherein the first water channel structure flows through the second medium cavity of the first heat exchanger and the second medium cavity of the second heat exchanger in sequence; The milk source flows through the first medium chamber and the sterilization chamber of the second heat exchanger in sequence.

2. The pasteurization system according to claim 1, characterized in that: The pasteurization system further includes a third heat exchanger, wherein a first medium cavity of the third heat exchanger is respectively connected to the first medium cavity of the second heat exchanger and the sterilization cavity, and a second medium cavity of the third heat exchanger is connected to the sterilization cavity, and the milk source flows sequentially through the first medium cavity of the second heat exchanger, the first medium cavity of the third heat exchanger, the sterilization cavity, and the second medium cavity of the third heat exchanger.

3. The pasteurization system according to claim 2, characterized in that: The first waterway structure comprises: A first tank body, wherein the first tank body is respectively connected to an outlet end of the second medium cavity of the first heat exchanger and an inlet end of the second medium cavity of the second heat exchanger; a second tank body, the second tank body being communicated with an inlet end of the second medium cavity of the first heat exchanger and an outlet end of the second medium cavity of the second heat exchanger respectively; a first water pump, disposed on a pipe connecting the second tank and the first heat exchanger; The second water pump is arranged on a pipeline connecting the first tank and the second heat exchanger.

4. The pasteurization system according to claim 3, characterized in that: A first regulating valve is provided at the outlet end of the second medium chamber of the first heat exchanger, and the first regulating valve is used to control the on / off and flow rate of the second medium chamber of the first heat exchanger.

5. The pasteurization system according to claim 4, characterized in that: A first temperature sensor is also provided at the outlet end of the second medium chamber of the first heat exchanger. The first temperature sensor measures the outlet water temperature of the first heat exchanger. The opening of the first regulating valve can be adjusted according to the measurement result of the first temperature sensor.

6. The pasteurization system according to claim 2, characterized in that: A second regulating valve is provided at the outlet end of the second medium chamber of the third heat exchanger, and the second regulating valve is used to control the on-off and flow rate of the second medium chamber of the third heat exchanger.

7. The pasteurization system according to claim 6, characterized in that: A second temperature sensor is also provided at the outlet end of the second medium cavity of the third heat exchanger. The second temperature sensor measures the milk outlet temperature of the third heat exchanger. The opening of the second regulating valve can be adjusted according to the measurement result of the second temperature sensor.

8. The pasteurization system according to claim 3, characterized in that: The pasteurization device further comprises a second water channel structure, and the second water channel structure flows through the heat exchange chamber of the pasteurization device.

9. The pasteurization system according to claim 8, characterized in that: The second waterway structure comprises: An electrically heated hot water tank and a third water pump, wherein the electrically heated hot water tank is connected to the inlet end of the heat exchange chamber through the second water pump, and the electrically heated hot water tank is connected to the outlet end of the heat exchange chamber.

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