Pre-pasteurization processing system

Abstract

The utility model belongs to the technical field of dairy product processing and production, and particularly discloses a pre-pasteurization processing system which is characterized in that a first heat exchanger, a balance tank and a second heat exchanger are sequentially connected between a raw milk bin and a cooked milk bin; the first heat exchanger comprises a first heat exchange channel and a second heat exchange channel, and the second heat exchanger comprises a third heat exchange channel, a fourth heat exchange channel, a fifth heat exchange channel and a sixth heat exchange channel; the raw milk bin is sequentially communicated with the first heat exchange channel, the balance tank, the third heat exchange channel, the fourth heat exchange channel, the second heat exchange channel and the cooked milk bin; the fifth heat exchange channel communicates with a water circulation heating mechanism. One end of the sixth heat exchange channel communicates with ice water production equipment, the other end of the sixth heat exchange channel is an ice water outlet, and a temperature sensor is installed on a pipeline between the fourth heat exchange channel and the second heat exchange channel. According to the pre-pasteurization device, the temperature of the pre-pasteurized cooked milk reaches the quality standard, and the refrigeration power consumption is reduced. The pre-pasteurization device is suitable for the pre-pasteurization process of dairy products.

Description

Technical Field

[0001] The utility model belongs to the technical field of dairy product processing and production, in particular to a pre-pasteurization processing system. Background Art

[0002] At present, large domestic dairy companies generally carry out a pre-pasteurization treatment on fresh milk, heating the milk to a temperature of 70-85 degrees Celsius for 15-30 seconds to kill harmful microorganisms and bacteria in the milk while retaining the nutrients and taste of the milk.

[0003] A Chinese utility model patent with authorization announcement number CN201617136U discloses a high-temperature milk sterilization device, including a heat exchanger, which is connected to a balancing tank and an insulation tank through a pipe, a cold water inlet is provided at one end of the heat exchanger, a hot water inlet is provided at the other end of the heat exchanger, and a cold water outlet and a hot water outlet are provided in the middle part of the heat exchanger; when in use, the milk in the balancing tank enters the heat exchanger through a sanitary pump, the heating device provides heat to the heat exchanger through the hot water inlet and the hot water outlet, ice water enters the heat exchanger from the cold water inlet, and flows out of the heat exchanger from the cold water outlet, when the milk passes through the heat exchanger, the milk is sterilized by high temperature, then kept warm by passing through the insulation tank, and finally cooled by the heat exchanger, and the milk that does not meet the sterilization requirements is returned to the balancing tank for sterilization again. The upper limit of the quality requirement for the temperature of cooked milk during sterilization production is generally between 6 and 10 degrees Celsius. However, in summer, the temperature is high, and during sterilization production, the temperature of cooked milk may reach above 10.5 degrees Celsius, exceeding the upper limit of the quality requirement. During the sterilization process, the on-site verification and analysis of the ice water temperature is 7-8 degrees Celsius, and the sterilization outlet temperature can reach 9.5 degrees Celsius, causing the cooked milk temperature to directly exceed the upper limit of 10 degrees Celsius. In addition, the frequency, time and flow of ice water used for sterilization are high, and the refrigerator needs to continuously provide 2-5 degrees Celsius ice water for a long time. The load of the refrigerator remains high, and the outlet temperature of the refrigerator is close to 1 degree Celsius, with low refrigeration efficiency and high energy consumption. Summary of the invention

[0004] The purpose of the utility model is to provide a pre-pasteurization processing system to ensure that the temperature of the cooked milk after pre-pasteurization reaches the quality standard of ≤10°C, and at the same time, reduce the refrigeration power consumption and alleviate the load of the refrigerator.

[0005] In order to achieve the above-mentioned purpose, the technical methods adopted by the utility model are as follows:

[0006] A pre-pasteurization processing system comprises a raw milk bin and a cooked milk bin, wherein a first heat exchanger, a balancing tank and a second heat exchanger are sequentially connected between the raw milk bin and the cooked milk bin through a pipeline; the first heat exchanger comprises a first heat exchange channel and a second heat exchange channel, and the second heat exchanger comprises a third heat exchange channel, a fourth heat exchange channel, a fifth heat exchange channel and a sixth heat exchange channel; an output port of the raw milk bin is sequentially connected with the first heat exchange channel, the balancing tank, the third heat exchange channel, the fourth heat exchange channel, the second heat exchange channel and an input port of the cooked milk bin; both ends of the fifth heat exchange channel are connected with a water circulation heating mechanism; one end of the sixth heat exchange channel is connected with an ice water production device, an ice water proportional valve is installed on the pipeline between the ice water production device and the sixth heat exchange channel, the other end of the sixth heat exchange channel is an ice water outlet, a temperature sensor is installed on the pipeline between the fourth heat exchange channel and the second heat exchange channel, and the opening of the ice water proportional valve is controlled according to the temperature detected by the temperature sensor on the pipeline between the fourth heat exchange channel and the second heat exchange channel.

[0007] As a limitation: a temperature sensor is installed on the pipe between the third heat exchange channel and the fourth heat exchange channel; the water circulation heating mechanism includes a first water tank for water circulation heating, a steam production device, a third heat exchanger, a pressure buffer tank and an automatic condensate drain, the third heat exchanger includes a seventh heat exchange channel and an eighth heat exchange channel, the output port of the steam production device is connected with the seventh heat exchange channel and the automatic condensate drain in sequence; the output port of the first water tank is connected with the input port of the pressure buffer tank, the output port of the pressure buffer tank is respectively connected with one end of the fifth heat exchange channel and the eighth heat exchange channel, and the eighth heat exchange channel is connected with the other end of the fifth heat exchange channel; a steam proportional valve is installed on the pipe between the output port of the steam production device and the seventh heat exchange channel, and the opening of the steam proportional valve is controlled according to the temperature detected by the temperature sensor on the pipe between the third heat exchange channel and the fourth heat exchange channel.

[0008] As a further limitation: the pipe between the third heat exchange channel and the fourth heat exchange channel is provided with an insulation section for keeping the product after heating and sterilization warm for a predetermined time; the temperature sensor installed on the pipe between the third heat exchange channel and the fourth heat exchange channel is installed on the pipe between the third heat exchange channel and the insulation section.

[0009] As another limitation: the system also includes a second water tank for cleaning, the output port of the second water tank is connected to the input port of the balancing tank through a pipeline, and the output port of the balancing tank is connected to the CIP cleaning balls in the balancing tank through a pipeline.

[0010] As another limitation: a pipe is provided between the output port of the third heat exchange channel and the balancing tank, and a pipe is provided between the output port of the fourth heat exchange channel and the balancing tank, for returning milk that does not meet the sterilization requirements to the balancing tank for sterilization process.

[0011] Due to the adoption of the above solution, the utility model has the following beneficial effects compared with the prior art:

[0012] The utility model provides a pre-pasteurization processing system, which arranges a first heat exchanger, a balance tank and a second heat exchanger between a raw milk bin and a cooked milk bin, provides heat to the second heat exchanger through a water circulation heating mechanism to perform heating sterilization, provides cold capacity to the second heat exchanger through ice water production equipment to reduce the product temperature, and then exchanges heat between the raw milk and the cooked milk through the first heat exchanger, thereby increasing the temperature of the input raw milk and reducing the temperature of the output cooked milk, ensuring that the temperature of the cooked milk after pre-pasteurization reaches the quality standard of ≤10°C, and controlling the opening of the steam proportional valve and the ice water proportional valve according to the temperature detected by the temperature sensor, increasing the raw milk input temperature, reducing the opening of the proportional valve, and effectively reducing the energy consumption of refrigeration and heating.

[0013] The utility model is suitable for the pre-pasteurization process of dairy products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic structural diagram of a pre-pasteurization processing system according to an embodiment of the utility model;

[0016] In the figure: 1, raw milk warehouse; 2, cooked milk warehouse; 3, first heat exchanger; 31, first heat exchange channel; 32, second heat exchange channel; 4, four-way reversing valve; 5, balance tank; 6, second heat exchanger; 61, third heat exchange channel; 62, fourth heat exchange channel; 63, fifth heat exchange channel; 64, sixth heat exchange channel; 7, insulation section; 8, first three-way reversing valve; 9, second three-way reversing valve; 10, third three-way reversing valve; 11, ice water production equipment; 12. Ice water proportional valve; 13. First water tank; 14. Pressure buffer tank; 15. Steam production equipment; 16. Steam proportional valve; 17. Third heat exchanger; 171. Seventh heat exchange channel; 172. Eighth heat exchange channel; 18. Automatic condensate drain; 19. Second water tank; QS, aseptic sampling valve; TT, temperature sensor; FT, electromagnetic flowmeter; TI, temperature gauge; TS, safety valve; TR, automatic exhaust valve; PI, pressure gauge. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the embodiments. Those skilled in the art should understand that the present invention is not limited to the following embodiments, and any improvements and equivalent changes made based on the specific embodiments of the present invention are within the scope of protection of the claims of the present invention.

[0018] Embodiment A pre-pasteurization processing system

[0019] A pre-pasteurization processing system, such as Figure 1 As shown, it includes a raw milk warehouse 1 and a cooked milk warehouse 2, and the first heat exchanger 3, the balancing tank 5 and the second heat exchanger 6 are connected in sequence between the raw milk warehouse 1 and the cooked milk warehouse 2 through pipelines; the first heat exchanger 3 includes a first heat exchange channel 31 and a second heat exchange channel 32, and the second heat exchanger 6 includes a third heat exchange channel 61, a fourth heat exchange channel 62, a fifth heat exchange channel 63 and a sixth heat exchange channel 64; the output port of the raw milk warehouse 1 is connected with the first heat exchange channel 31, the balancing tank 5, the third heat exchange channel 61, the fourth heat exchange channel 62, the second heat exchange channel 32 and the input port of the cooked milk warehouse 2 in sequence, and the pipeline between the third heat exchange channel 61 and the fourth heat exchange channel 62 is provided with an insulation section 7 for keeping the product after heating and sterilization for a predetermined time.

[0020] A feed pump is connected to the pipeline between the output port of the raw milk warehouse 1 and the first heat exchange channel 31; a four-way reversing valve 4 and a one-way valve are installed in sequence on the pipeline between the first heat exchange channel 31 and the input port of the balancing tank 5, the first connection port of the four-way reversing valve 4 is connected to the first heat exchange channel 31, the second connection port of the four-way reversing valve 4 is connected to the check valve, the hydraulic valve and the second water tank 19 for cleaning in sequence, the third connection port of the four-way reversing valve 4 is connected to the one-way valve and the input port of the balancing tank 5 in sequence, and the fourth connection port of the four-way reversing valve 4 is used for draining; a low liquid level sensor and a high liquid level sensor are installed in the balancing tank 5, a centrifugal pump and an electromagnetic flowmeter FT are installed in sequence on the pipeline between the output port of the balancing tank 5 and the third heat exchange channel 61, a pipeline is connected between the centrifugal pump and the CIP cleaning ball in the balancing tank 5, and a one-way valve is installed on the pipeline between the centrifugal pump and the CIP cleaning ball in the balancing tank 5; a temperature sensor TT is installed on the pipeline between the third heat exchange channel 61 and the insulation section 7; the pipeline between the insulation section 7 and the fourth heat exchange channel 62 A temperature sensor TT, a safety valve TS, an automatic exhaust valve TR, a temperature gauge TI and a first three-way reversing valve 8 are sequentially installed on the heat exchange channel. The first connection port of the first three-way reversing valve 8 is connected to the heat preservation section 7, the second connection port of the first three-way reversing valve 8 is connected to the fourth heat exchange channel 62, and the third connection port of the first three-way reversing valve 8 is connected to the balance tank 5; a temperature sensor TT, a sterile sampling valve QS and a second three-way reversing valve 9 are sequentially installed between the fourth heat exchange channel 62 and the second heat exchange channel 32, and the second three-way reversing valve 9 is connected to the heat exchange channel 62 and the second heat exchange channel 32. The first connection port of the reversing valve 9 is connected to the fourth heat exchange channel 62, the second connection port of the second three-way reversing valve 9 is connected to the balancing tank 5, and a third three-way reversing valve 10 is installed on the connecting pipe between the second connection port of the second three-way reversing valve 9 and the balancing tank 5, and the third connection port of the second three-way reversing valve 9 is connected to the second heat exchange channel 32; the two connection ports of the third three-way reversing valve 10 are respectively connected to the second connection port of the second three-way reversing valve 9 and the balancing tank 5, and the third connection port of the third three-way reversing valve 10 is used for draining.

[0021] One end of the sixth heat exchange channel 64 is connected to the ice water production equipment 11, and the other end is the ice water outlet. An ice water proportional valve 12 is installed on the pipeline between the ice water production equipment 11 and the sixth heat exchange channel 64, and the switch of the ice water proportional valve 12 is controlled according to the temperature detected by the temperature sensor TT on the pipeline between the fourth heat exchange channel 62 and the second heat exchange channel 32; the two ends of the fifth heat exchange channel 63 are connected to a water circulation heating mechanism, which includes a first water tank 13 for water circulation heating, a steam production equipment 15, a third heat exchanger 17, a pressure buffer tank 14 and an automatic condensate drain valve 18. The third heat exchanger 17 includes a seventh heat exchange channel 171 and an eighth heat exchange channel 172. The output port of the steam production equipment 15 is connected to the seventh heat exchange channel 171 and the automatic condensate drain valve 18 in sequence. A steam proportional valve 16 is installed on the pipeline between the output port of the steam production equipment 15 and the seventh heat exchange channel 171. The temperature detected by the temperature sensor TT on the pipeline between the third heat exchange channel 61 and the insulation section 7 The switch of the steam proportional valve 16 is controlled by the degree, and a drain valve is installed on the output pipe of the condensate automatic drain valve 18; the output port of the first water tank 13 is connected to the input port of the pressure buffer tank 14, and a pressure regulating valve and a spring safety valve are installed in sequence on the pipe between the output port of the first water tank 13 and the input port of the pressure buffer tank 14, and a drainage pipe is provided between the pressure buffer tank 14 and the spring safety valve, and a drainage valve is installed on the drainage pipe; a pressure gauge PI is installed on the output pipeline of the pressure buffer tank 14, and the output port of the pressure buffer tank 14 is respectively connected to one end of the fifth heat exchange channel 63 and the eighth heat exchange channel 172, and a temperature gauge TI is installed on the pipe of the fifth heat exchange channel 63, and a centrifugal pump is installed on the pipe of the eighth heat exchange channel 172, the eighth heat exchange channel 172 is connected to the other end of the fifth heat exchange channel 63, and a temperature gauge TI, a temperature sensor TT and a pressure regulating valve are installed in sequence on the pipes of the eighth heat exchange channel 172 and the fifth heat exchange channel 63.

[0022] When the dairy product pre-pasteurization processing system of this embodiment is used, the raw milk in the raw milk warehouse 1 is output to the cooked milk warehouse 2 through the first heat exchange channel 31 of the first heat exchanger 3, the balance tank 5, the third heat exchange channel 61, the insulation section 7, the fourth heat exchange channel 62, and the second heat exchange channel 32 in sequence through the feed pump. The temperature of the product passing through the third heat exchange channel 61 reaches 70-85°C, and is kept warm for a predetermined time in the insulation section 7 to achieve the purpose of sterilization; the water circulation heating mechanism connected to the fifth heat exchange channel 63 is used to provide heat so that the product temperature can reach 70-85°C; the product output from the insulation section 7 is cooled through the fourth heat exchange channel 62, and then exchanges heat with the raw milk through the second heat exchange channel 32, so that the temperature of the cooked milk in the cooked milk warehouse 2 can be ≤10°C, meeting the quality requirements; the ice water circulating in the sixth heat exchange channel 64 is used to cool the product, and the opening of the ice water proportional valve 12 can be controlled according to the temperature detected by the temperature sensor TT on the pipeline between the fourth heat exchange channel 62 and the second heat exchange channel 32. The first water tank 13 in the water circulation heating mechanism provides a water source for the fifth heat exchange channel 63. The water output by the first water tank 13 forms a water circulation closed loop between the fifth heat exchange channel 63 and the eighth heat exchange channel 172. The steam output by the steam production equipment 15 is input to the seventh heat exchange channel 171 to heat the water in the eighth heat exchange channel 172. The opening of the steam proportional valve 16 can be controlled according to the temperature detected by the temperature sensor TT on the pipeline between the third heat exchange channel 61 and the insulation section 7.

[0023] When the sterilization of the product passing through the insulation section 7 does not meet the requirements, it is necessary to adjust the first three-way reversing valve 8 to form a passage between the insulation section 7 and the balancing tank 5, and the milk that does not meet the sterilization requirements will flow back to the balancing tank 5 for the sterilization process; when the sterilization of the product passing through the fourth heat exchange channel 62 does not meet the requirements, it is necessary to adjust the second three-way reversing valve 9 to form a passage between the fourth heat exchange channel 62 and the balancing tank 5, and the milk that does not meet the sterilization requirements will flow back to the balancing tank 5 for the sterilization process.

[0024] When CIP cleaning is required, open the valve on the output pipeline of the second water tank 19, adjust the four-way reversing valve 4 to form a passage between the second water tank 19 and the balancing tank 5, and perform CIP cleaning. The water output from the balancing tank 5 flows to the CIP cleaning ball through the centrifugal pump, and the CIP cleaning ball cleans the balancing tank 5.

[0025] In this embodiment, the temperature of the raw milk output from the raw milk warehouse 1 is 4-6°C. It is preheated to 25°C through the first heat exchanger 3, heated to 85°C after passing through the third heat exchange channel 61 of the second heat exchanger 6, and kept warm through the insulation section 7. It is then output to the fourth heat exchange channel 62 of the second heat exchanger 6 and cooled to 25°C. It is then cooled to 7-8°C through the second heat exchange channel 32 of the first heat exchanger 3, which meets the quality requirement of 6-10°C. The heat of cooked milk and the coldness of raw milk are used in both directions to increase the input temperature of raw milk. The opening of the steam proportional valve 16 and the ice water proportional valve 12 are controlled according to the temperature detected by the temperature sensor TT to achieve energy saving and consumption reduction.

Claims

1. A pre-pasteurization processing system, comprising a raw milk warehouse and a cooked milk warehouse, characterized in that: The raw milk bin and the cooked milk bin are connected in sequence via pipelines, a first heat exchanger, a balancing tank and a second heat exchanger; the first heat exchanger includes a first heat exchange channel and a second heat exchange channel, and the second heat exchanger includes a third heat exchange channel, a fourth heat exchange channel, a fifth heat exchange channel and a sixth heat exchange channel; the output port of the raw milk bin is connected in sequence with the first heat exchange channel, the balancing tank, the third heat exchange channel, the fourth heat exchange channel, the second heat exchange channel and the input port of the cooked milk bin; both ends of the fifth heat exchange channel are connected with a water circulation heating mechanism; one end of the sixth heat exchange channel is connected with an ice water production equipment, an ice water proportional valve is installed on the pipeline between the ice water production equipment and the sixth heat exchange channel, the other end of the sixth heat exchange channel is an ice water outlet, a temperature sensor is installed on the pipeline between the fourth heat exchange channel and the second heat exchange channel, and the switch of the ice water proportional valve is controlled according to the temperature detected by the temperature sensor on the pipeline between the fourth heat exchange channel and the second heat exchange channel.

2. A pre-pasteurization processing system according to claim 1, characterized in that: A temperature sensor is installed on the pipe between the third heat exchange channel and the fourth heat exchange channel; the water circulation heating mechanism includes a first water tank for water circulation heating, a steam production device, a third heat exchanger, a pressure buffer tank and an automatic condensate drain, the third heat exchanger includes a seventh heat exchange channel and an eighth heat exchange channel, the output port of the steam production device is connected with the seventh heat exchange channel and the automatic condensate drain in sequence; the output port of the first water tank is connected with the input port of the pressure buffer tank, the output port of the pressure buffer tank is connected with one end of the fifth heat exchange channel and the eighth heat exchange channel respectively, and the eighth heat exchange channel is connected with the other end of the fifth heat exchange channel; a steam proportional valve is installed on the pipe between the output port of the steam production device and the seventh heat exchange channel, and the switch of the steam proportional valve is controlled according to the temperature detected by the temperature sensor on the pipe between the third heat exchange channel and the fourth heat exchange channel.

3. A pre-pasteurization processing system according to claim 2, characterized in that: The pipe between the third heat exchange channel and the fourth heat exchange channel is provided with an insulation section for keeping the product after heating and sterilization for a predetermined time; the temperature sensor installed on the pipe between the third heat exchange channel and the fourth heat exchange channel is installed on the pipe between the third heat exchange channel and the insulation section.

4. A pre-pasteurization processing system according to any one of claims 1 to 3, characterized in that: The system also includes a second water tank for cleaning, the output port of the second water tank is connected to the input port of the balancing tank through a pipeline, and the output port of the balancing tank is connected to the CIP cleaning ball in the balancing tank through a pipeline.

5. A pre-pasteurization processing system according to any one of claims 1 to 3, characterized in that: A pipeline is provided between the output port of the third heat exchange channel and the balancing tank, and a pipeline is provided between the output port of the fourth heat exchange channel and the balancing tank, for returning milk that does not meet the sterilization requirements to the balancing tank for the sterilization process.

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