Dairy product production line

Abstract

The utility model relates to the technical field of food production, and provides a dairy product production line which comprises a milk bin, a sterilization machine, a filling machine, a fat separator, a reverse osmosis membrane device and an ultrafiltration percolation membrane device, the milk bin is in fluid communication with the fat separator through a first pipeline, the fat separator is in fluid communication with the reverse osmosis membrane device through a second pipeline, and the reverse osmosis membrane device is in fluid communication with the ultrafiltration percolation membrane device through a third pipeline. The ultrafiltration percolation membrane device is in fluid communication with the sterilization machine through a fourth pipeline, and the sterilization machine is in fluid communication with the filling machine through a fifth pipeline. Thus, fat separation is carried out on the raw milk feed liquid through the fat separator according to the fat content requirement, redundant fat is separated and removed, combined concentration is carried out on the raw milk feed liquid through the reverse osmosis membrane device and the ultrafiltration percolation membrane device in sequence, and finally it can be guaranteed that the protein content in the feed liquid meets the requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to food production technical field especially relates to a dairy product production line. BACKGROUND

[0002] In today's health and nutrition-focused consumer era, high-protein foods and beverages are highly favored. Protein, as an important nutrient for the human body, plays a key role in maintaining normal physiological functions, enhancing immunity, promoting muscle repair and growth, and other aspects. Therefore, consumers have high expectations and strict requirements for the high protein content in the material liquid (such as milk beverages, plant protein beverages, protein milkshakes, etc.).

[0003] In the traditional production process of material liquid, it is challenging to ensure high protein content. On the one hand, the quality of protein raw materials is uneven. For example, when using whey protein, soy protein, etc. as a protein source, different batches of raw materials differ in protein content, solubility, and stability, etc., which makes it difficult to accurately control the protein content in the material liquid. On the other hand, the influence of production process on protein content cannot be ignored. During the preparation, sterilization, homogenization, etc. of the material liquid, protein may denature, aggregate or precipitate, etc., resulting in a decrease in protein content or uneven distribution, thereby affecting the quality and taste of the product.

[0004] In addition, the quality standards and regulations for high-protein material liquid on the market are becoming increasingly stringent. Relevant regulations and standards clearly stipulate the minimum protein content requirement in the material liquid, and enterprises must ensure that their products meet these standards, otherwise they will face market access and consumer trust issues. However, existing production technology and quality control methods still have deficiencies in ensuring the stability of high protein content. SUMMARY

[0005] The utility model provides a dairy product production line to solve the problem that the protein content in the material liquid in the prior art is difficult to meet the requirements.

[0006] The utility model provides a dairy product production line, including milk storehouse, sterilizer, filling machine, fat separator, reverse osmosis membrane device and ultrafiltration membrane device,

[0007] The milk storehouse is in fluid communication with the fat separator through a first pipeline, the fat separator is in fluid communication with the reverse osmosis membrane device through a second pipeline, the reverse osmosis membrane device is in fluid communication with the ultrafiltration membrane device through a third pipeline, the ultrafiltration membrane device is in fluid communication with the sterilizer through a fourth pipeline, and the sterilizer is in fluid communication with the filling machine through a fifth pipeline

[0008] The utility model provides a kind of dairy production line, the dairy production line further include control mainboard, first online detection instrument and second online detection instrument;

[0009] The first online detection instrument is installed on the third pipeline, the second online detection instrument is installed on the fourth pipeline, the reverse osmosis membrane device, the ultrafiltration membrane device, the first online detection instrument and the second online detection instrument are electrically connected with the control mainboard, and the control mainboard is configured to control the action of the reverse osmosis membrane device to make the first detection value of the first online detection instrument equal to the first target detection value, and control the action of the ultrafiltration membrane device to make the second detection value of the second online detection instrument equal to the second target detection value.

[0010] According to the utility model provides a kind of dairy production line, the dairy production line further include first pump body and first heat exchanger, and the first pump body and first heat exchanger are installed on the first pipeline.

[0011] According to the utility model provides a kind of dairy production line, the dairy production line further include second pump body and first temporary storage tank, and the second pump body and the first temporary storage tank are installed on the second pipeline.

[0012] According to the utility model provides a kind of dairy production line, the dairy production line further include high shear mixer, and the high shear mixer is installed on the fourth pipeline.

[0013] According to the utility model provides a kind of dairy production line, the dairy production line further include three-way valve, the inlet of the high shear mixer is connected to the first part of the fourth pipeline, the outlet of the high shear mixer is connected to the first port of the three-way valve, the second port of the three-way valve is in fluid communication with the high shear mixer through reflux pipeline, and the third port of the three-way valve is connected to the second part of the fourth pipeline.

[0014] According to the utility model provides a kind of dairy production line, the dairy production line further include filter and second heat exchanger, and the reflux pipeline is provided with the second heat exchanger and the filter.

[0015] According to the utility model provides a kind of dairy production line, the dairy production line further include second temporary storage tank and third pump body, and the second temporary storage tank and the third pump body are installed on the fourth pipeline, and the second temporary storage tank is located in the upstream of the high shear mixer.

[0016] According to the utility model provides a kind of dairy production line, the dairy production line further include third heat exchanger and homogenizer, and the third heat exchanger and the homogenizer are installed on the fourth pipeline, and are located in the downstream of the high shear mixer.

[0017] According to the dairy product production line, the third temporary storage tank is installed on the fourth pipeline and located downstream of the high-shear mixer.

[0018] The dairy product production line provided by the utility model separates the excess fat from the raw milk liquid through the fat separator according to the fat content requirement, and sequentially concentrates the raw milk liquid through the reverse osmosis membrane device and the ultrafiltration membrane device, so that the protein content in the liquid can finally meet the requirement. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 It is the structural schematic diagram of the dairy product production line provided by the utility model.

[0021] Reference signs:

[0022] 1, milk tank; 2, sterilization machine; 3, filling machine; 4, fat separator; 5, reverse osmosis membrane device; 6, ultrafiltration membrane device; 7, control mainboard; 8, first online detection instrument; 9, second online detection instrument; 10, first pump body; 11, first heat exchanger; 12, first temporary storage tank; 13, second pump body; 14, high-shear mixer; 15, three-way valve; 16, second heat exchanger; 17, filter; 18, second temporary storage tank; 19, third pump body; 20, third heat exchanger; 21, homogenizer; 22, third temporary storage tank. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the drawings in the utility model, and clearly and completely describe the technical scheme in the utility model, obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] The following will combine Figure 1 to describe the dairy product production line of the utility model.

[0025] As Figure 1As shown, the dairy product production line of the embodiment of the utility model, include: milk storehouse 1, sterilizer 2, filling machine 3, fat separator 4, reverse osmosis membrane device 5 and ultrafiltration membrane device 6.

[0026] The reverse osmosis membrane device 5 can be a RO membrane, which is a reverse osmosis membrane. The working principle of the RO membrane is based on the reverse osmosis phenomenon of a semi-permeable membrane. In a natural state, when two solutions of different concentrations are separated by a semi-permeable membrane, water will diffuse from the side with a lower concentration to the side with a higher concentration through the semi-permeable membrane. This process is called osmosis. However, if a pressure greater than the osmotic pressure is applied to the side with the higher concentration, the direction of water flow will reverse, from the side with the higher concentration to the side with the lower concentration, thereby achieving water purification and separation. This is reverse osmosis. The RO membrane has an extremely fine pore structure, with a pore size typically between 0.1 nanometers and 1 nanometer, allowing only water molecules to pass through, while various ions, organic matter, bacteria, viruses, and other impurities in the water are trapped, thereby achieving the purpose of purifying water quality.

[0027] The ultrafiltration membrane device 6 can be a UF membrane, which is an ultrafiltration membrane. It is an important membrane technology for separating, concentrating, and purifying substances. The working principle of the UF membrane is mainly based on the sieving effect. It has a micro-porous structure with a certain pore size range, typically between 0.001-0.1 micrometers. Under pressure-driven conditions, water and small molecular substances in the solution can pass through the membrane pores, while macromolecular substances, colloids, bacteria, viruses, and other substances with sizes larger than the membrane pores are trapped, thereby achieving separation and filtration of different substances.

[0028] The difference between the UF membrane and the RO membrane lies in the following aspects:

[0029] Pore size: The pore size of the RO membrane is typically between 0.1 nanometers and 1 nanometer, while the pore size of the UF membrane is generally between 0.001-0.1 micrometers, with the UF membrane having a much larger pore size than the RO membrane. Separation object: The RO membrane can trap almost all ions, small molecular organic matter, etc., and is mainly used for desalination and removal of small molecular impurities; the UF membrane is mainly used for trapping macromolecular organic matter, colloids, bacteria, etc., and has poor trapping effect on ions and small molecular substances. Operating pressure: The RO membrane requires a relatively high operating pressure, typically between 1-10 MPa; the operating pressure of the UF membrane is relatively low, typically between 0.1-0.5 MPa.

[0030] In practical applications, the milk tank 1 is in fluid communication with the fat separator 4 through a first pipeline, the fat separator 4 is in fluid communication with the reverse osmosis membrane device 5 through a second pipeline, the reverse osmosis membrane device 5 is in fluid communication with the ultrafiltration membrane device 6 through a third pipeline, the ultrafiltration membrane device 6 is in fluid communication with the sterilizer 2 through a fourth pipeline, and the sterilizer 2 is in fluid communication with the filling machine 3 through a fifth pipeline.

[0031] Specifically, the raw milk liquid in the milk tank 1 is transported to the fat separator 4 through the first pipeline. The fat separator 4 uses the principle of centrifugal separation. The centrifugal force generated by high-speed rotation separates the fat balls in the liquid from other components. According to different product requirements, the parameters of the separator can be adjusted to separate the liquid into parts with different fat contents, such as whole milk, low-fat milk, and skim milk. The separated liquid is transported to the reverse osmosis membrane device 5 through the second pipeline.

[0032] The liquid entering the reverse osmosis membrane device 5 passes through the reverse osmosis membrane under pressure. The reverse osmosis membrane has a very fine pore structure that only allows water molecules to pass through, while it can intercept various ions, organic matter, bacteria, and other impurities in the liquid. This process can remove some water and small molecular impurities in the liquid, while concentrating the nutritional ingredients in the liquid, improving the concentration and quality of the liquid. The liquid treated by reverse osmosis is flowed into the ultrafiltration membrane device 6 through the third pipeline.

[0033] The ultrafiltration membrane device 6 uses the screening effect of the ultrafiltration membrane to further separate and purify the liquid. The pore size of the ultrafiltration membrane is generally between 0.001 and 0.1 microns, which can intercept large molecular proteins, colloids, and other substances in the liquid, while removing some small molecular impurities and excess water. By adding an appropriate amount of water to the ultrafiltration membrane device 6, further purification and concentration of the protein and other ingredients in the liquid can be achieved. The treated liquid is transported to the sterilizer 2 through the fourth pipeline.

[0034] The sterilizer 2 uses high-temperature instantaneous sterilization or pasteurization methods to sterilize the liquid. Taking high-temperature instantaneous sterilization as an example, the liquid is heated to 135-140°C in a short time, maintained for 2-4 seconds, and then rapidly cooled. This sterilization method can effectively kill harmful microorganisms in the liquid while maximizing the retention of nutritional ingredients and flavor. The sterilized liquid enters the filling machine 3 through the fifth pipeline.

[0035] The filling machine 3 accurately fills the sterilized liquid into different packaging containers such as plastic bottles, paper boxes, glass bottles, etc. according to the packaging specifications of the product. During the filling process, it is necessary to ensure that the packaging container is tightly sealed to prevent the liquid from being contaminated again. After filling, the product is labeled, coded, etc., and then quality inspection is carried out. The qualified products can be stored in the warehouse or sold on the market.

[0036] It can be understood that after the fat separator 4 separates the fat from the raw milk liquid according to the optimal separation ratio, the low-fat milk liquid enters the RO membrane, and then the liquid is concentrated according to the optimal concentration ratio, and the concentrated liquid enters the UF membrane, so that the liquid is concentrated again according to the optimal concentration ratio to obtain the required high-protein raw milk.

[0037] In this way, the fat separator 4 separates the fat from the raw milk liquid according to the fat content requirement, thereby removing the excess fat, and the raw milk liquid is sequentially concentrated by the reverse osmosis membrane device 5 and the ultrafiltration membrane device 6. Finally, the protein content in the liquid can meet the requirements.

[0038] In an alternative embodiment, as shown in FIG. 1B, the dairy product production line further includes a control mainboard 7, a first online detection instrument 8, and a second online detection instrument 9. Figure 1

[0039] The first online detection instrument 8 is installed on the third pipeline, and the second online detection instrument 9 is installed on the fourth pipeline. The reverse osmosis membrane device 5, the ultrafiltration membrane device 6, the first online detection instrument 8, and the second online detection instrument 9 are electrically connected to the control mainboard 7. The control mainboard 7 is configured to control the action of the reverse osmosis membrane device 5 to make the first detection value of the first online detection instrument 8 equal to the first target detection value, and to control the action of the ultrafiltration membrane device 6 to make the second detection value of the second online detection instrument 9 equal to the second target detection value.

[0040] It should be noted that the first target detection value and the second target detection value are set in the control mainboard 7 according to the production standards and quality requirements of the dairy product. For example, the first target detection value can be a specific concentration value of a certain key component in the liquid after being treated by the reverse osmosis membrane device 5; the second target detection value can be the desired content of protein in the liquid after being treated by the ultrafiltration membrane device 6.

[0041] Specifically, when the liquid enters the reverse osmosis membrane device 5 from the fat separator 4 through the second pipeline, the first online detection instrument 8 starts to detect the relevant indicators of the liquid in the third pipeline in real time, and transmits the detected first detection value to the control mainboard 7. The control mainboard 7 compares the first detection value with the first target detection value in real time. If the first detection value is higher than the first target detection value, the control mainboard 7 will issue an instruction to appropriately reduce the working pressure of the reverse osmosis membrane device 5. Because the water permeates the reverse osmosis membrane at a slower speed after the pressure is reduced, and the proportion of components such as lactose that are intercepted is relatively increased, thereby reducing the lactose content in the liquid that subsequently enters the third pipeline. If the first detection value is lower than the first target detection value, the control mainboard 7 will control the reverse osmosis membrane device 5 to repeat filtration multiple times until the first detection value equals the first target detection value.

[0042] ​The material liquid after the treatment of the reverse osmosis membrane device 5 enters the ultrafiltration membrane device 6, and the second on-line detection instrument 9 detects the material liquid in the fourth pipeline in real time and transmits the second detection value to the control mainboard 7. The control mainboard 7 also compares the second detection value with the second target detection value. If the second detection value is higher than the second target detection value, the control mainboard 7 controls the ultrafiltration membrane device 6 to increase the water addition amount or adjust the filtration flux of the membrane, so that more water and small molecular impurities pass through the membrane, thereby reducing the relative content of the protein in the material liquid. If the second detection value is lower than the second target detection value, the control mainboard 7 controls the ultrafiltration membrane device 6 to repeatedly filter multiple times, so that the second detection value finally equals the second target detection value.

[0043] In actual application, a first loop can be arranged between the second pipeline and the third pipeline, and the first loop is started to realize the re-filtration of the material liquid by the reverse osmosis membrane device 5 when the first detection value is lower than the first target detection value. Of course, a second loop can also be arranged between the fourth pipeline and the third pipeline, and the second loop is started to realize the re-filtration of the material liquid by the ultrafiltration membrane device 6 when the second detection value is lower than the second target detection value.

[0044] In an optional embodiment, as shown in Figure 1 The dairy product production line further includes a first pump body 10 and a first heat exchanger 11, and the first pump body 10 and the first heat exchanger 11 are installed on the first pipeline.

[0045] Specifically, the raw milk material liquid in the milk tank 1 starts to flow from the milk tank 1 to the first pipeline under the action of the first pump body 10. After the first pump body 10 is started, the motor drives the impeller to rotate at a high speed to generate a centrifugal force, so that the material liquid is sucked from the inlet and then delivered to the downstream of the first pipeline at a certain pressure and flow rate through the action of the impeller.

[0046] As the raw milk material liquid flows in the first pipeline, it enters the first heat exchanger 11. Taking a plate heat exchanger as an example, the raw milk material liquid flows in the adjacent plate channel and exchanges heat with the heating medium (such as hot water) in the other channel. The heating medium transfers heat to the raw milk material liquid through the counter-flow with the raw milk material liquid, so that the temperature of the raw milk material liquid gradually increases.

[0047] In an optional embodiment, as shown in Figure 1 The dairy product production line further includes a second pump body 13 and a first temporary storage tank 12, and the second pump body 13 and the first temporary storage tank 12 are installed on the second pipeline.

[0048] It should be noted that the material liquid separated from the fat separator 4 enters the second pipeline, and the second pump body 13 starts to work. After the second pump body 13 starts, the material liquid is sucked from the inlet and pressurized and then delivered to the downstream. When the discharge flow of the fat separator 4 is unstable or the feed demand of the reverse osmosis membrane device 5 changes, the first temporary storage tank 12 plays a role in buffering and adjusting. If the discharge speed of the fat separator 4 increases, the excess material liquid can be temporarily stored in the temporary storage tank; if the feed demand of the reverse osmosis membrane device 5 increases, the temporary storage tank can supplement the material liquid in time to ensure the continuity of production.

[0049] In an optional embodiment, as shown in Figure 1 The dairy product production line further includes a high-shear mixer 14, which is installed on the fourth pipeline.

[0050] It should be noted that the high-shear mixer 14 mainly relies on the strong shear force formed between the high-speed rotating rotor and the stator to realize the mixing, dispersion and homogenization of the material. When the material enters the working cavity of the mixer, the high-speed rotating rotor generates a strong centrifugal force, which throws the material from the center of the rotor to the gap of the stator. In this process, the material is subjected to high-speed shearing, impact, grinding and other actions, so that the particles that were originally aggregated together are broken up, and the materials of different components can be fully mixed. At the same time, the special structure of the stator will form a reverse resistance to the material, further enhancing the shearing effect and ensuring that the material can reach a good mixing state in a short time.

[0051] In an optional embodiment, as shown in Figure 1 The dairy product production line further includes a three-way valve 15, the inlet of the high-shear mixer 14 is connected to the first part of the fourth pipeline, the outlet of the high-shear mixer 14 is connected to the first port of the three-way valve 15, the second port of the three-way valve 15 is in fluid communication with the high-shear mixer 14 through a reflux pipeline, and the third port of the three-way valve 15 is connected to the second part of the fourth pipeline.

[0052] It should be noted that the material liquid treated by the ultrafiltration membrane device 6 enters the high-shear mixer 14 from the first part of the fourth pipeline. After the mixer starts, the strong shear force is formed between the high-speed rotating rotor and the stator to mix and disperse the material liquid. If other ingredients are added to the material liquid, the high-shear action can make these ingredients uniformly dispersed in the material liquid. During operation, the mixer continuously maintains the set speed and time to ensure the mixing effect.

[0053] When the high-shear mixer 14 starts to work, the three-way valve 15 is in a state of returning the material liquid from the outlet of the high-shear mixer 14 to the inlet of the mixer through the reflux pipeline. In this way, the material liquid is continuously circulated between the mixer and the reflux pipeline, and the material is more uniform after multiple shearing and mixing.

[0054] Once the set mixing time is reached, switch the three-way valve 15 to allow the liquid to flow from the outlet of the high-shear mixer 14 to the second part of the fourth pipeline. At this time, the fully mixed liquid leaves the high-shear mixer 14 and continues to flow along the fourth pipeline to the sterilizer 2, entering the next production process.

[0055] In optional embodiments, such as Figure 1 As shown, the dairy production line also includes a filter 17 and a second heat exchanger 16, with the second heat exchanger 16 and the filter 17 installed on the return line.

[0056] During the internal circulation phase of the high-shear mixer 14, the feed liquid flows from the outlet of the high-shear mixer 14 through the return pipeline into the second heat exchanger 16. The second heat exchanger 16 regulates the temperature of the feed liquid by exchanging heat with the heating or cooling medium. Furthermore, the heated feed liquid enters the filter 17. The filter element of the filter 17 intercepts particulate impurities in the feed liquid, such as protein aggregates and undissolved additive particles.

[0057] In optional embodiments, such as Figure 1 As shown, the dairy production line also includes a second temporary storage tank 18 and a third pump body 19, which are installed on the fourth pipeline. The second temporary storage tank 18 is located upstream of the high-shear mixer 14.

[0058] Specifically, the second temporary storage tank 18 and the third pump body 19 are installed in the first part of the fourth pipeline, wherein the second online monitoring instrument 9 is located upstream of the second temporary storage tank 18.

[0059] It should be noted that the feed liquid treated by the ultrafiltration membrane device 6 first flows into the second temporary storage tank 18. When the discharge rate of the ultrafiltration membrane device 6 is unstable, the temporary storage tank acts as a buffer. If the discharge rate increases, excess feed liquid will be temporarily stored in the tank; if the discharge rate decreases, the temporary storage tank can continuously supply feed liquid to the high-shear mixer 14, ensuring the stability of the feed to the high-shear mixer 14. The third pump 19, according to the feed requirements of the high-shear mixer 14, transports the feed liquid from the second temporary storage tank 18 to the high-shear mixer 14. The feed flow rate and pressure are precisely controlled by adjusting the pump's speed or flow control valve.

[0060] In optional embodiments, such as Figure 1 As shown, the dairy production line also includes a third heat exchanger 20 and a homogenizer 21, which are installed on the fourth pipeline and are both located downstream of the high-shear mixer 14.

[0061] It should be noted that the third heat exchanger 20 and the homogenizer 21 are installed in the second part of the fourth pipeline. The homogenizer 21 is a device that enables materials to achieve a fine and uniform mixing effect under high pressure, high speed and other conditions.

[0062] The material liquid from the high shear mixer 14 enters a third heat exchanger 20. The third heat exchanger 20 heats or cools the material liquid according to a set temperature parameter. For example, if the temperature of the material liquid is lower than the suitable feeding temperature of the homogenizer 21, the heat exchanger exchanges heat with the material liquid by using a hot medium (such as hot water) to increase the temperature of the material liquid to 65-70℃.

[0063] The material liquid whose temperature is adjusted by the third heat exchanger 20 enters the homogenizer 21. The homogenizer 21 refines and uniformly disperses the fat globules and other particles in the material liquid by high pressure. In the homogenization process, the material liquid passes through the narrow gap of the homogenizer valve under high pressure, and is subjected to high-speed shearing force, cavitation effect, and impact force, etc. to break large particles into small particles. For example, the diameter of the fat globules in the material liquid is refined from several microns to less than 1 micron to prevent the fat globules from floating and improve the stability and taste of the material liquid.

[0064] In an optional embodiment, as shown in FIG. 2, the dairy product production line further comprises a third temporary storage tank 22, which is installed on the fourth pipeline and located downstream of the high shear mixer 14. Figure 1

[0065] It should be noted that the third temporary storage tank 22 is installed on the second part of the fourth pipeline, and the third temporary storage tank 22 is located between the homogenizer 21 and the sterilizer 2.

[0066] It can be understood that the sterilizer 2, the filling machine 3, the fat separator 4, the first pump body 10, the first heat exchanger 11, the second pump body 13, the high shear mixer 14, the three-way valve 15, the second heat exchanger 16, the third pump body 19, the third heat exchanger 20, the homogenizer 21, etc. can be electrically connected with the control mainboard 7.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.​

Claims

1. A dairy product line, characterized in that, The milk tank, the sterilization machine, the filling machine, the fat separator, the reverse osmosis membrane device and the ultrafiltration membrane device are connected in series through the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the fifth pipeline. The milk product production line further comprises a control mainboard, a first online detection instrument and a second online detection instrument. The first online detection instrument is installed on the third pipeline, and the second online detection instrument is installed on the fourth pipeline.

2. The dairy product line according to claim 1, characterized in that, The control mainboard is configured to control the action of the reverse osmosis membrane device so that the first detection value of the first online detection instrument is equal to a first target detection value, and control the action of the ultrafiltration membrane device so that the second detection value of the second online detection instrument is equal to a second target detection value. The milk product production line further comprises a first pump body and a first heat exchanger, which are installed on the first pipeline.

3. The dairy product line according to claim 1, characterized in that, The milk product production line further comprises a second pump body and a first temporary storage tank, which are installed on the second pipeline.

4. The dairy product line according to claim 1, characterized in that, The milk product production line further comprises a high-shear mixer, which is installed on the fourth pipeline.

5. The dairy product line according to claim 1, characterized in that, The milk product production line further comprises a three-way valve, an inlet of the high-shear mixer is connected to a first part of the fourth pipeline, an outlet of the high-shear mixer is connected to a first port of the three-way valve, a second port of the three-way valve is in fluid communication with the high-shear mixer through a backflow pipeline, and a third port of the three-way valve is connected to a second part of the fourth pipeline.

6. The dairy product line according to claim 5, characterized in that, The milk product production line further comprises a filter and a second heat exchanger, which are installed on the backflow pipeline.

7. The dairy product line according to claim 6, characterized in that, The milk product production line further comprises a second temporary storage tank and a third pump body, which are installed on the fourth pipeline, and the second temporary storage tank is located upstream of the high-shear mixer.

8. The dairy product line according to claim 5, characterized in that, The milk product production line further comprises a third heat exchanger and a homogenizer, which are installed on the fourth pipeline and are both located downstream of the high-shear mixer.

9. The dairy product line according to claim 5, characterized in that, The milk product production line further comprises a third temporary storage tank, which is installed on the fourth pipeline and is located downstream of the high-shear mixer.

10. The dairy product line according to claim 5, characterized in that, ​

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