CN219981990U

CN219981990U - Dairy product production line

Info

Publication number: CN219981990U
Application number: CN202321494331.6U
Authority: CN
Inventors: 牛世祯; 任向东; 李洪亮; 朱敏; 王春燕; 黄玉堃; 张学光; 杨畅; 哈斯格日图; 胡鹏丽
Original assignee: Inner Mongolia Mengniu Dairy Group Co Ltd
Current assignee: Inner Mongolia Mengniu Dairy Group Co Ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-11-10
Anticipated expiration: 2033-06-12

Abstract

The utility model relates to the technical field of dairy product production, in particular to a dairy product production line. The dairy product production line comprises: the milk bin (1), the fat separator (4), the cream mixing tank (5), the skim milk degerming device (9), the cation exchange device, the micro-filtration and percolation membrane device (15), the ultra-filtration and percolation membrane device (16), the nanofiltration membrane device (17) and the reverse osmosis membrane device (18). The milk source bioactive substances are separated and extracted through the combined use of the cation exchange device, the microfiltration and percolation membrane device, the ultrafiltration and percolation membrane device, the nanofiltration membrane device and the reverse osmosis membrane device, and the milk source bioactive substances are singly sterilized at low temperature and then backfilled into semi-finished products of dairy products, so that the retention rate and the content of active substances such as lactoferrin, lactoperoxidase, alpha-lactalbumin, beta-lactoglobulin, immunoglobulin and the like in milk are obviously improved, and the shelf life of the milk rich in the milk source bioactive substances under normal temperature conditions is prolonged.

Description

Dairy product production line

Technical Field

The utility model relates to the technical field of dairy product production, in particular to a dairy product production line.

Background

For dairy products, consumers are gradually focusing on the content of bioactive substances such as immunoglobulins, lactoferrin, lactoperoxidase, alpha-lactalbumin, beta-lactoglobulin, etc. in the products in addition to the protein, calcium content. However, many of the above-mentioned bioactive substances have heat-sensitive properties and are susceptible to denaturation by heat, which results in great susceptibility to loss or denaturation during processing of the dairy product (e.g. sterilization), and also results in failure of storage of the dairy product at normal temperature or short shelf life at normal temperature. At present, the existing milk products with relatively high active substance content are mostly pasteurized at low temperature, but the products need to be refrigerated at low temperature and have a shelf life of only 7-15 days, while the existing normal-temperature milk has low active substance content although the existing milk does not need to be refrigerated and has long shelf life. Therefore, it is of great importance to develop a production line for dairy products which are rich in various bioactive substances and have a long shelf life.

Disclosure of Invention

The utility model provides a dairy product production line, which aims to solve the problems that milk is subjected to ultrahigh-temperature sterilization and other high-strength sterilization to cause denaturation and content reduction of milk-derived bioactive substances (such as immunoglobulin, lactoferrin, lactoperoxidase, alpha-lactalbumin, beta-lactoglobulin and the like) and the shelf life of milk rich in milk-derived bioactive substances is short in the prior art.

Specifically, the utility model provides the following technical scheme:

the present utility model provides a dairy product production line, comprising: the milk bin (1), the fat separator (4), the cream mixing tank (5), the skim milk degerming device (9), the cation exchange device, the micro-filtration and percolation film device (15), the ultra-filtration and percolation film device (16), the nanofiltration film device (17) and the reverse osmosis film device (18);

wherein, the discharge port of the milk bin (1) is connected with the feed port of the fat separator (4), and the cream discharge port and the skim milk discharge port of the fat separator (4) are respectively connected with the feed ports of the cream mixing tank (5) and the skim milk degerming device (9);

the permeate discharge port of the skim milk degerming device (9) is connected with the feed port of the cation exchange device, the permeate discharge port of the cation exchange device is connected with the feed port of the microfiltration and filtration membrane device (15), the permeate discharge port of the microfiltration and filtration membrane device (15) is connected with the feed port of the ultrafiltration and filtration membrane device (16), the permeate discharge port of the ultrafiltration and filtration membrane device (16) is connected with the feed port of the nanofiltration membrane device (17), and the permeate discharge port of the nanofiltration membrane device (17) is connected with the feed port of the reverse osmosis membrane device (18).

In the present utility model, the cation exchange device is used for separating active substances such as lactoferrin, lactoperoxidase and the like. The cation exchange device may employ a cation exchange membrane having a pore size of 0.8 to 1.0 μm. Alternatively, the cation exchange device is a cation exchange membrane, and the cation exchange membrane can be replaced by a cation chromatography column, so that more possibility is provided for process realization.

A microfiltration diafiltration membrane device (15) for separating whey proteins. The microfiltration percolation membrane device (15) can adopt a microfiltration ceramic membrane, a roll membrane or a hollow fiber membrane with the diameter of 0.1-0.2 mu m.

An ultrafiltration membrane apparatus (16) is used for concentrating and purifying whey proteins. The ultrafiltration and diafiltration membrane device (16) may be an ultrafiltration roll membrane, hollow fiber membrane or ceramic membrane with a molecular weight cut-off of 1000-500000 Da.

Nanofiltration membrane device (17) is used for separating lactose. The nanofiltration membrane device (17) can adopt a nanofiltration roll type membrane with the molecular weight cut-off of 200-1000 Da.

The reverse osmosis membrane device (18) is used for separating the milk mineral salt. The reverse osmosis membrane device (18) can adopt reverse osmosis coiled membranes with the thickness of the feeding flow channel of 0.7-0.9 mm.

In the production line of the utility model, the connection may be via a pipeline connection.

In some embodiments of the utility model, the outlet of the milk hopper (1) is connected to the inlet of the fat separator (4) via a first line (30).

In some embodiments of the utility model, a centrifugal pump (2) and a warming heat exchanger (3) are also arranged between the discharge port of the milk bin (1) and the feed port of the fat separator (4).

In some embodiments of the utility model, the skim milk outlet of the fat separator (4) and the feed inlet of the skim milk sterilization device (9) are connected by a second line (31); the cream discharge port of the fat separator (4) is connected with the feed port of the cream mixing tank (5) through a third pipeline (32).

In some embodiments of the utility model, a vacuum degassing device (10) and a double screw pump (11) are also arranged between the permeate outlet of the skim milk sterilization device (9) and the feed inlet of the cation exchange device. Wherein, a permeate discharge port of the skim milk degerming device (9) is connected with the vacuum degassing device (10) and the double screw pump (11) sequentially through a fourth pipeline (33).

In some embodiments of the utility model, a reversing valve (28) is also arranged between the permeate outlet of the skim milk sterilization device (9) and the feed inlet of the cation exchange device. Preferably, the reversing valve (28) is arranged downstream of the twin-screw pump (11).

In some embodiments of the utility model, the cation exchange arrangement comprises a first cation exchange arrangement (12) and a second cation exchange arrangement (13) of parallel design. Wherein the reversing valve (28) is connected with the feed inlets of the first cation exchange device (12) and the second cation exchange device (13) through a fifth pipeline (34) and a seventh pipeline (36) respectively.

In some embodiments of the utility model, a cooling heat exchanger (14) is also arranged between the permeate outlet of the cation exchange device and the feed inlet of the microfiltration percolation film device (15).

In some embodiments of the utility model, a reversing valve (28) is also provided between the permeate outlet of the cation exchange device and the feed inlet of the microfiltration diafiltration membrane device (15). The discharge ports of the first cation exchange device (12) and the second cation exchange device (13) are respectively connected with a reversing valve (28) through a sixth pipeline (35) and an eighth pipeline (37).

In some embodiments of the utility model, the permeate outlet of the microfiltration diafiltration membrane device (15) is connected to the feed inlet of the ultrafiltration diafiltration membrane device (16) by an eleventh line (40). The permeate outlet of the ultrafiltration and diafiltration membrane device (16) is connected with the feed inlet of the nanofiltration membrane device (17) through a fourteenth pipeline (43), and the permeate outlet of the nanofiltration membrane device (17) is connected with the feed inlet of the reverse osmosis membrane device (18) through an eighteenth pipeline (47).

Preferably, a trapped fluid discharge port of the skim milk degerming device (9) is connected with a cream mixing tank (5); the production line further comprises a first sterilization system (8), and a discharge port of the cream mixing tank (5) is connected with a feed inlet of the first sterilization system (8).

In the traditional dairy product production line, trapped fluid generated by degerming skim milk is often directly discharged as waste liquid, and subsequent processing treatment is not performed, so that material loss and product yield are greatly reduced. According to the production line, the trapped fluid discharge port of the skim milk degerming device (9) is connected with the cream mixing tank (5), and the cream is mixed with the trapped fluid of the skim milk degerming and then sterilized, so that the microbial quantity can be effectively controlled, the shelf life safety of a product is ensured, the material loss is reduced, and the yield of the product is improved.

In some embodiments of the utility model, the retentate outlet of the skim milk sterilization device (9) is connected to the cream mixing tank (5) via a twenty-fifth line (54).

In some embodiments of the utility model, a centrifugal pump (2), a flow meter (6) and an on-line detection instrument (7) are further arranged between the discharge port of the cream mixing tank (5) and the first sterilization system (8).

In some embodiments of the utility model, the discharge port of the cream mix tank (5) is connected to the first sterilization system (8) by a twenty-sixth line (55).

Preferably, the production line further comprises a material temporary storage tank (21), wherein the discharge port of the first sterilization system (8), the concentrated solution discharge port of the microfiltration and filtration membrane device (15), the concentrated solution discharge port of the nanofiltration membrane device (17) and the permeate solution discharge port and the concentrated solution discharge port of the reverse osmosis membrane device (18) are connected with the feed port of the material temporary storage tank (21) together through pipelines.

In some embodiments of the present utility model, the discharge port of the first sterilization system (8), the concentrate discharge port of the microfiltration and filtration membrane device (15), the concentrate discharge port of the nanofiltration membrane device (17), and the permeate discharge port and concentrate discharge port of the reverse osmosis membrane device (18) sequentially pass through a twenty-seventh pipeline (56), a thirteenth pipeline (42), a fifteenth pipeline (44), a seventeenth pipeline (46) and a nineteenth pipeline (48) and are connected to the feed port of the material temporary storage tank (21) after being collected.

Preferably, the production line further comprises a semi-finished product temporary storage tank (65) and a second sterilization system (22);

the discharge gate of material temporary storage tank (21) with the feed inlet of semi-manufactured goods temporary storage tank (65) is connected, the discharge gate of semi-manufactured goods temporary storage tank (65) with the feed inlet of second sterilization system (22) is connected.

In some embodiments of the utility model, a centrifugal pump (2), a flow meter (6) and an on-line detection instrument (7) are further arranged between the discharge port of the material temporary storage tank (21) and the feed port of the semi-finished product temporary storage tank (65).

In some embodiments of the utility model, the outlet of the material holding tank (21) is connected to the inlet of the semifinished holding tank (65) by a twenty-ninth line (58).

Preferably, the production line further comprises a concentrating and purifying device (63), a first active substance mixing tank (19) and a second active substance mixing tank (64);

the eluent discharge port of the cation exchange device is connected with the feed port of the concentration and purification device (63), the discharge port of the concentration and purification device (63) is connected with the feed ports of the second active substance mixing tank (64) and the first active substance mixing tank (19), and the concentrated solution discharge port of the ultrafiltration and filtration membrane device (16) is connected with the feed ports of the second active substance mixing tank (64) and the first active substance mixing tank (19).

In some embodiments of the utility model, the eluent outlet of the cation exchange device is connected to the concentrating and purifying device (63) through a ninth line (38), a tenth line (39).

In some embodiments of the utility model, the concentrate outlet of the ultrafiltration membrane apparatus (16) is connected to the feed inlet of the second active material mixing tank (64) and the first active material mixing tank (19) by a twelfth line (41).

In some embodiments of the utility model, a reversing valve (28) is further arranged between the outlet of the concentration purification device (63) and the inlet of the second active substance mixing tank (64) and the first active substance mixing tank (19), and between the outlet of the concentrated solution of the ultrafiltration membrane permeation device (16) and the second active substance mixing tank (64) and the first active substance mixing tank (19).

Preferably, the production line further comprises a deep impurity removal filter device (23), an absolute sterilization device (24) and a low-temperature pasteurization system (25);

the discharge port of the first active material mixing tank (19) and the discharge port of the second active material mixing tank (64) are connected with the feed port of the deep impurity removal filter device (23) through pipelines, the discharge port of the deep impurity removal filter device (23) is connected with the feed port of the absolute sterilization device (24), and the discharge port of the absolute sterilization device (24) is connected with the feed port of the low-temperature pasteurization system (25).

The active substances in the first active substance mixing tank and the second active substance mixing tank can be sterilized by adopting a combined sterilization mode of absolute sterilization and low-temperature pasteurization, so that the safety and quality of the product can be better ensured.

In some embodiments of the utility model, a reversing valve (28) is also arranged between the discharge port of the second active material mixing tank (64) and the first active material mixing tank (19) and the feed port of the deep impurity removal filter device (23).

Preferably, the above-mentioned production line also includes static mixer (26) and filling machine (27);

the discharge port of the low-temperature pasteurization system (25) and the discharge port of the second sterilization system (22) are connected with the feed port of the static mixer (26) together through pipelines, and the discharge port of the static mixer (26) is connected with the feed port of the filling machine (27).

In some embodiments of the utility model, the outlet of the second sterilization system (22) and the outlet of the low temperature pasteurization system (25) are joined by a thirty-first line (59) and a thirty-first line (60), respectively, to the inlet of the static mixer (26).

In some embodiments of the utility model, a centrifugal pump (2), a flow meter (6) and an on-line detection instrument (7) are also arranged between the outlet of the low temperature pasteurization system (25) and the inlet of the static mixer (26).

Preferably, the above-mentioned production line also includes the percolate mixing tank (20);

the concentrated solution discharge port of the nanofiltration membrane device (17) is connected with the feed port of the percolate mixing tank (20), and the permeate discharge port and the concentrated solution discharge port of the reverse osmosis membrane device (18) are respectively connected with the percolate mixing tank (20);

and a discharge hole of the percolate mixing tank (20) is respectively connected with percolate inlets of the micro-filtration percolate film device (15) and the ultra-filtration percolate film device (16).

The arrangement of the percolate mixing tank (20) ensures that percolate is not required to be added from an external source in the percolation process, and the percolate proportion is realized through the combination of a plurality of membrane devices, so that the separation efficiency can be improved by carrying out percolation elution.

In some embodiments of the utility model, the concentrate outlet of the nanofiltration membrane unit (17) is connected to the feed inlet of the percolate mixing tank (20) via a sixteenth line (45).

In some embodiments of the utility model, an on-line detector (7), a reversing valve (28) and a flow meter (6) are also arranged between the concentrated solution outlet of the nanofiltration membrane device (17) and the feed inlet of the percolate mixing tank (20) in sequence.

In some embodiments of the utility model, the concentrate outlet of the reverse osmosis membrane device (18) is connected to the feed of the permeate mixing tank (20) by a twenty-first line (50).

In some embodiments of the utility model, a reversing valve (28) and a flow meter (6) are also arranged between the concentrate outlet of the reverse osmosis membrane device (18) and the feed inlet of the percolate mixing tank (20).

In some embodiments of the utility model, a permeate outlet of the reverse osmosis membrane device (18) is connected with the permeate mixing tank (20) through a twentieth pipeline (49), and a reversing valve (28) and a flow meter (6) are arranged on the twentieth pipeline (49).

In some embodiments of the utility model, a centrifugal pump (2), a flow meter (6) and a reversing valve (28) are also arranged between the outlet of the percolate mixing tank (20) and the percolate inlets of the microfiltration percolate membrane device (15) and the ultrafiltration percolate membrane device (16).

In some embodiments of the utility model, between the outlet of the percolate mixing tank (20) and the percolate inlets of the microfiltration and ultrafiltration membrane device (15, 16), the flow meter (6) is connected to the reversing valve (28) by means of a line (51). The reversing valve (28) is connected with a percolate inlet of the ultrafiltration and diafiltration membrane device (16) and a percolate inlet of the microfiltration and diafiltration membrane device (15) through a pipeline (52) and a pipeline (53) respectively. An automatic regulating valve (29) can also be arranged upstream of the percolate inlet of the microfiltration percolate membrane device (15).

Preferably, in the production line, the cation exchange device comprises a first cation exchange device (12) and a second cation exchange device (13) which are designed in parallel. The continuous operation of the large-scale production line can be realized through the parallel redundancy design of the cation exchange device, and the operation efficiency is improved.

In some embodiments of the utility model, the first cation exchange device (12) and the second cation exchange device (13) are connected in parallel through a fifth pipeline (34) and a seventh pipeline (36), permeate of the cation exchange devices is connected in parallel through a sixth pipeline (35) and an eighth pipeline (37), and eluent of the cation exchange devices is connected in parallel through a ninth pipeline (38) and a tenth pipeline (39), so that the aim of continuous production of the system is fulfilled.

Preferably, in the production line, a vacuum degassing device (10) and a double screw pump (11) are arranged between a permeate discharge port of the skim milk degerming device (9) and a feed port of the cation exchange device. The degerming skimmed milk is degassed through the vacuum degassing device, so that the gas content in materials can be reduced, meanwhile, the degerming skimmed milk is conveyed through the double-screw pump, stable feeding can be ensured, active substance extraction efficiency reduction caused by material fluctuation is reduced, and the active substance content in products is better ensured.

Preferably, the production line further comprises a PLC control system (61) and an online control module (62). The traditional dairy product production line generally needs to be provided with a temporary storage tank for each feed liquid when the feed liquids are mixed, and meanwhile, the temporary storage tank is required to be mixed for many times, even if the temporary storage tank is difficult to reach target indexes, the process needs to be detected off line for many times, the steps are complex, and labor and time are required to be consumed. The application of the online detection and online control system in the production line enables the material temporary storage tank to be obviously reduced, and simultaneously, the physical and chemical data control is more accurate.

The beneficial effects of the utility model at least comprise: the dairy product production line provided by the utility model separates and extracts the milk-source bioactive substances through the combined use of the cation exchange device, the microfiltration percolation membrane device, the ultrafiltration percolation membrane device, the nanofiltration membrane device and the reverse osmosis membrane device, and the milk-source bioactive substances are backfilled into semi-finished products of dairy products after being sterilized at low temperature independently, so that the retention rate and the content of active substances such as lactoferrin, alpha-lactalbumin, beta-lactoglobulin and immunoglobulin in milk are obviously improved, and the shelf life of the milk rich in the milk-source bioactive substances under normal temperature conditions is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a dairy product production line provided by the utility model.

Reference numerals illustrate: 1. a milk bin; 2. a centrifugal pump; 3. a temperature rising heat exchanger; 4. a fat separator; 5. a cream mixing tank; 6. a flow meter; 7. an on-line detection instrument; 8. a first sterilization system; 9. a skim milk degerming device; 10. a vacuum degasser; 11. a twin screw pump; 12. a first cation exchange means; 13. a second cation exchange means; 14. a cooling heat exchanger; 15. a microfiltration membrane device; 16. an ultrafiltration membrane device; 17. nanofiltration membrane device; 18. a reverse osmosis membrane device; 19. a first active material mixing tank; 20. a percolate mixing tank; 21. a material temporary storage tank; 22. a second sterilization system; 23. deep impurity removing and filtering device; 24. an absolute sterilization device; 25. a low temperature pasteurization system; 26. a static mixer; 27. filling machine; 28. a reversing valve; 29. an automatic regulating valve; 30. a first pipeline; 31. a second pipeline; 32. a third pipeline; 33. a fourth pipeline; 34. a fifth line; 35. a sixth pipeline; 36. a seventh pipeline; 37. an eighth pipeline; 38. a ninth pipeline; 39. a tenth pipeline; 40. an eleventh line; 41. a twelfth pipeline; 42. a thirteenth line; 43. a fourteenth pipeline; 44. a fifteenth pipeline; 45. a sixteenth pipeline; 46. seventeenth line; 47. an eighteenth pipeline; 48. nineteenth line; 49. a twentieth line; 50. a twenty-first line; 51. a twenty-second line; 52. a twenty-third line; 53. twenty-fourth pipeline; 54. a twenty-fifth line; 55. a twenty-sixth pipeline; 56. a twenty-seventh line; 57. a twenty eighth pipeline; 58. a twenty-ninth line; 59. a thirty-first pipeline; 60. a thirty-first line; 61. a PLC control system; 62. an on-line control module; 63. a concentrating and purifying device; 64. a second active material mixing tank; 65. semi-manufactured goods temporary storage tank.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

The embodiment provides a dairy products production line, the production line includes: the milk bin (1), the fat separator (4), the cream mixing tank (5), the skim milk degerming device (9), the cation exchange device, the micro-filtration and percolation film device (15), the ultra-filtration and percolation film device (16), the nanofiltration film device (17) and the reverse osmosis film device (18);

In the production line according to this embodiment, the connection may be through a pipeline.

In one embodiment, the outlet of the milk container (1) is connected to the inlet of the fat separator (4) via a first line (30).

In one embodiment, a centrifugal pump (2) and a heating heat exchanger (3) are also arranged between the discharge port of the milk bin (1) and the feed port of the fat separator (4).

In one embodiment, the skim milk outlet of the fat separator (4) and the feed inlet of the skim milk sterilization device (9) are connected by a second pipeline (31); the cream discharge port of the fat separator (4) is connected with the feed port of the cream mixing tank (5) through a third pipeline (32).

In one embodiment, a vacuum degassing device (10) and a double screw pump (11) are also arranged between the permeate outlet of the skim milk degerming device (9) and the feed inlet of the cation exchange device. Wherein, a permeate discharge port of the skim milk degerming device (9) is connected with the vacuum degassing device (10) and the double screw pump (11) sequentially through a fourth pipeline (33).

In one embodiment, a reversing valve (28) is also arranged between the permeate outlet of the skim milk sterilization device (9) and the feed inlet of the cation exchange device. Preferably, the reversing valve (28) is arranged downstream of the twin-screw pump (11).

In one embodiment, the cation exchange device comprises a first cation exchange device (12) and a second cation exchange device (13) of parallel design. Wherein the reversing valve (28) is connected with the feed inlets of the first cation exchange device (12) and the second cation exchange device (13) through a fifth pipeline (34) and a seventh pipeline (36) respectively.

In one embodiment, a cooling heat exchanger (14) is also arranged between the permeate outlet of the cation exchange device and the feed inlet of the microfiltration percolation film device (15).

In one embodiment, a reversing valve (28) is also arranged between the permeate outlet of the cation exchange device and the feed inlet of the microfiltration percolation film device (15). The discharge ports of the first cation exchange device (12) and the second cation exchange device (13) are respectively connected with a reversing valve (28) through a sixth pipeline (35) and an eighth pipeline (37).

In one embodiment, the permeate outlet of the microfiltration membrane device (15) is connected to the feed inlet of the ultrafiltration membrane device (16) by an eleventh line (40). The permeate outlet of the ultrafiltration and diafiltration membrane device (16) is connected with the feed inlet of the nanofiltration membrane device (17) through a fourteenth pipeline (43), and the permeate outlet of the nanofiltration membrane device (17) is connected with the feed inlet of the reverse osmosis membrane device (18) through an eighteenth pipeline (47).

In one embodiment, the retentate outlet of the skim milk sterilization device (9) is connected to the cream mixing tank (5) via a twenty-fifth line (54).

In addition to any one of the above embodiments, as a preferred embodiment, a retentate outlet of the skim milk sterilization device (9) is connected to a cream mixing tank (5); the production line further comprises a first sterilization system (8), and a discharge port of the cream mixing tank (5) is connected with a feed inlet of the first sterilization system (8).

In one embodiment, a centrifugal pump (2), a flow meter (6) and an on-line detection instrument (7) are further arranged between the discharge port of the cream mixing tank (5) and the first sterilization system (8).

In one embodiment, the outlet of the cream mix tank (5) is connected to the first sterilization system (8) by a twenty-sixth line (55).

On the basis of any one of the above embodiments, as a preferred embodiment, the production line further includes a material temporary storage tank (21), and the discharge port of the first sterilization system (8), the concentrate discharge port of the microfiltration and percolation membrane device (15), the concentrate discharge port of the nanofiltration membrane device (17), and the permeate discharge port and the concentrate discharge port of the reverse osmosis membrane device (18) are connected together with the feed port of the material temporary storage tank (21) through pipelines.

In one embodiment, the discharge port of the first sterilization system (8), the concentrate discharge port of the microfiltration and filtration membrane device (15), the concentrate discharge port of the nanofiltration membrane device (17), and the permeate discharge port and the concentrate discharge port of the reverse osmosis membrane device (18) sequentially pass through a twenty-seventh pipeline (56), a thirteenth pipeline (42), a fifteenth pipeline (44), a seventeenth pipeline (46) and a nineteenth pipeline (48) to be collected and then are connected with the feed port of the material temporary storage tank (21).

On the basis of any one of the above embodiments, as a preferred embodiment, the production line further comprises a semi-finished product temporary storage tank (65) and a second sterilization system (22);

In one embodiment, a centrifugal pump (2), a flow meter (6) and an on-line detection instrument (7) are further arranged between the discharge port of the material temporary storage tank (21) and the feed port of the semi-finished product temporary storage tank (65).

In one embodiment, the outlet of the material holding tank (21) is connected to the inlet of the semifinished holding tank (65) via a twenty-ninth line (58).

On the basis of any one of the above embodiments, as a preferred embodiment, the production line further includes a concentration and purification device (63), a first active material mixing tank (19), and a second active material mixing tank (64);

the eluent discharge port of the cation exchange device is connected with the feed port of the concentration and purification device (63), the discharge port of the concentration and purification device (63) is connected with the feed port of the first active substance mixing tank (19) and the feed port of the second active substance mixing tank (64), and the concentrate discharge port of the ultrafiltration and filtration membrane device (16) is connected with the feed port of the first active substance mixing tank (19) and the feed port of the second active substance mixing tank (64).

In one embodiment, the eluent outlet of the cation exchange device is connected with the concentration and purification device (63) through a ninth pipeline (38) and a tenth pipeline (39).

In one embodiment, the concentrate outlet of the ultrafiltration and diafiltration membrane device (16) is connected to the first active substance mixing tank (19) and the feed inlet of the second active substance mixing tank (64) via a twelfth line (41).

In one embodiment, a reversing valve (28) is further provided between the outlet of the concentration and purification device (63) and the inlet of the first active material mixing tank (19) and the inlet of the second active material mixing tank (64), and between the outlet of the concentrated solution of the ultrafiltration membrane permeation device (16) and the first active material mixing tank (19) and the second active material mixing tank (64).

On the basis of any one of the above embodiments, as a preferred embodiment, the production line further comprises a deep impurity removal filter device (23), an absolute sterilization device (24) and a low-temperature pasteurization system (25);

In one embodiment, a reversing valve (28) is also arranged between the discharge ports of the first active material mixing tank (19) and the second active material mixing tank (64) and the feed port of the deep impurity removal filter device (23).

On the basis of any one of the above embodiments, as a preferred embodiment, the above production line further comprises a static mixer (26) and a filling machine (27);

In one embodiment, the outlet of the second sterilization system (22) and the outlet of the low temperature pasteurization system (25) are joined by a thirty-first line (59) and a thirty-first line (60), respectively, and then connected to the inlet of the static mixer (26).

In one embodiment, a centrifugal pump (2), a flow meter (6) and an on-line detection instrument (7) are also arranged between the outlet of the low temperature pasteurization system (25) and the inlet of the static mixer (26).

On the basis of any one of the above embodiments, as a preferred embodiment, the above production line further comprises a percolate mixing tank (20);

concentrate discharge gate of nanofiltration membrane device (17) with the feed inlet of filtration liquid blending tank (20) is connected, concentrate and the permeate discharge gate of reverse osmosis membrane device (18) with filtration liquid blending tank (20) is connected, the discharge gate of filtration liquid blending tank (20) respectively with micro filtration membrane device (15) with the filtration liquid entry linkage of ultrafiltration filtration membrane device (16).

In one embodiment, the concentrate outlet of the nanofiltration membrane device (17) is connected to the feed inlet of the percolate mixing tank (20) via a sixteenth line (45).

In one embodiment, an on-line detector (7), a reversing valve (28) and a flow meter (6) are sequentially arranged between the concentrated solution discharge port of the nanofiltration membrane device (17) and the feed port of the percolate mixing tank (20).

In one embodiment, the concentrate outlet of the reverse osmosis membrane device (18) is connected to the feed inlet of the percolate mixing tank (20) via a twenty-first line (50).

In one embodiment, a reversing valve (28) and a flow meter (6) are also arranged between the concentrate outlet of the reverse osmosis membrane device (18) and the feed inlet of the percolate mixing tank (20).

In one embodiment, the permeate outlet of the reverse osmosis membrane device (18) is connected to the feed inlet of the permeate mixing tank (20) via a twentieth line (49) and is provided with a reversing valve (28) and a flow meter (6) in between.

In one embodiment, a centrifugal pump (2), a flow meter (6) and a reversing valve (28) are also arranged between the discharge port of the percolate mixing tank (20) and the percolate inlets of the microfiltration percolate device (15) and the ultrafiltration percolate device (16).

In one embodiment, a flow meter (6) is connected to a reversing valve (28) via a line (51) between the outlet of the permeate mixing tank (20) and the permeate inlets of the microfiltration and ultrafiltration membrane devices (15, 16). The reversing valve (28) is connected with a percolate inlet of the ultrafiltration and diafiltration membrane device (16) and a percolate inlet of the microfiltration and diafiltration membrane device (15) through a pipeline (52) and a pipeline (53) respectively. An automatic regulating valve (29) can also be arranged upstream of the percolate inlet of the microfiltration percolate membrane device (15).

In the production line, the cation exchange device comprises a first cation exchange device (12) and a second cation exchange device (13) which are designed in parallel.

In one embodiment, the first cation exchange device (12) and the second cation exchange device (13) are connected in parallel through a fifth pipeline (34) and a seventh pipeline (36), permeate of the cation exchange devices is connected in parallel through a sixth pipeline (35) and an eighth pipeline (37), and eluent of the cation exchange devices is connected in parallel through a ninth pipeline (38) and a tenth pipeline (39), so that the aim of continuous production of the system is fulfilled.

In the production line, as a preferable embodiment, a vacuum degassing device (10) and a twin screw pump (11) are provided between the permeate outlet of the skim milk sterilization device (9) and the feed inlet of the cation exchange device.

In addition to any of the above embodiments, as a preferred embodiment, the production line further includes a PLC control system (61) and an on-line control module (62).

As a preferred embodiment, the schematic structure of the dairy product production line is shown in fig. 1.

The workflow of the dairy product production line described above is generally as follows:

raw milk is purified and is collected into a milk bin (1), a discharge port of the milk bin (1) is connected with a centrifugal pump (2), and the raw milk is conveyed to a heating heat exchanger (3) and a fat separator (4) through a first pipeline (30) to start a heating and fat separation process.

Raw milk is subjected to a fat separator (4) to obtain skimmed milk and cream, and the cream enters a cream mixing tank (5) through a third pipeline (32); meanwhile, the skim milk enters a skim milk degerming device (9) for degerming through a second pipeline (31), and the trapped fluid enters a cream mixing tank (5) through a twenty-fifth pipeline (54) to be mixed with cream for further treatment.

The centrifugal pump (2), the flow instrument (6) and the online detection instrument (7) are connected to the discharge gate of the cream mixing tank (5), and the cream enters the first sterilization system (8) for sterilization through a twenty-sixth pipeline (55), so that the cream and the sterilization trapped fluid are mixed for sterilization, the quality of the product is further guaranteed, and the yield of the product is improved.

The permeate (namely degerming skim milk) of the skim milk degerming device (9) is degassed by the vacuum degassing device (10), so that the gas content in materials is reduced, and meanwhile, the materials are conveyed by the double-screw pump (11), so that the stability of the materials is guaranteed, and the reduction of the extraction efficiency of active substances caused by material fluctuation is reduced.

Then, the degerming skim milk goes through a reversing valve (28) and goes through a fifth pipeline (34) to the first cation exchange device (12) for enriching active substances such as lactoferrin, lactoperoxidase and the like, permeate goes through a sixth pipeline (35), the reversing valve (28) and a cooling heat exchanger (14), enters a microfiltration and filtration membrane device (15) at low temperature for separating active substances, permeate goes through an eleventh pipeline (40) to an ultrafiltration and filtration membrane device (16) for concentrating and lactose removing, and concentrate goes through a twelfth pipeline (41) to a first active substance mixing tank (19) for temporary storage.

The first cation exchange device (12) and the second cation exchange device (13) are in parallel connection, so that the operation efficiency can be remarkably improved, and a feasibility scheme is provided for industrial continuous operation.

The first cation exchange device (12) is automatically switched to the second cation exchange device (13) for active material enrichment after adsorption saturation, permeate of the second cation exchange device (13) enters the micro-filtration and percolation film device (15) for active material separation at low temperature through an eighth pipeline (37), a reversing valve (28) and a cooling heat exchanger (14), permeate enters the ultra-filtration and percolation film device (16) for concentration and lactose removal through an eleventh pipeline (40), and concentrate enters a second active material mixing tank (64) for temporary storage through a twelfth pipeline (41); and the active substances are eluted from the first cation exchange device (12), the eluted active substances enter a concentration and purification device (63) through a ninth pipeline (38) and a reversing valve (28) for concentration and desalination, and finally enter a first active substance mixing tank (19) for mixing and subsequent treatment. The active substances eluted by the second cation exchange device (13) enter a concentration purification (63) through a tenth pipeline (39) and a reversing valve (28) for concentration and desalination, and finally enter a second active substance mixing tank (64) for mixing and subsequent treatment.

The micro-filtration and filtration membrane device (15) can remarkably improve the separation effect by separating the whey protein through a filtration process, and the ultra-filtration and filtration membrane device (16) uses the filtration process to concentrate the whey protein separated by the micro-filtration and filtration membrane device (15) so as to improve the protein purity. In the diafiltration process, a solution is added for elution, and the eluting solution (percolate) can be composed of concentrated solution of the nanofiltration membrane device (17), and the mixed ratio of the permeate solution of the reverse osmosis membrane device (18) and the concentrated solution.

The permeate of the ultrafiltration and diafiltration membrane device (16) enters the nanofiltration membrane device (17) for separation through a fourteenth pipeline (43), and the obtained concentrated lactose liquid enters the percolate mixing tank (20) through a sixteenth pipeline (45) after passing through an on-line detection instrument (7) and a reversing valve (28) for diafiltration solution preparation. The superfluous concentrated solution of the nanofiltration membrane device (17) is mixed with other materials on line through a fifteenth pipeline (44) by a reversing valve (28). The pipeline is provided with a flow meter (6) for material balance and automatic control.

The permeate of the nanofiltration membrane device (17) enters a reverse osmosis membrane device (18) through an eighteenth pipeline (47) to be concentrated, the obtained concentrate enters a percolate mixing tank (20) through a reversing valve (28) and a flow meter (6) for mixing ratio, and the redundant concentrate is mixed with other materials on line through a seventeenth pipeline (46) through the flow meter (6); the obtained permeate enters a permeate mixing tank (20) for mixing ratio through a reversing valve (28) and a flow meter (6), and the redundant permeate is mixed with other materials on line through a nineteenth pipeline (48) through the flow meter (6).

The sterilized cream obtained through the first sterilizing system (8), the concentrated solution of the microfiltration percolation film device (15), the concentrated solution of the nanofiltration film device (17), the concentrated solution of the reverse osmosis film device (18) and the permeate are mixed on line and then enter the material temporary storage tank (21) to be stirred and then pass through the centrifugal pump (2) and the flow meter (6), the mixed materials are judged through the on-line detection instrument (7), whether the physicochemical indexes meet the requirements of target products or not is judged, if not, the physicochemical indexes are returned to the material temporary storage tank (21) through the twenty-eighth pipeline (57) for remixing, the aim of adjusting the physicochemical indexes is achieved, the flow of the centrifugal pump (2) is regulated and controlled through the detection results of the flow meter (6) and the on-line detection instrument (7), and the automatic control of the material indexes is achieved.

The qualified material of physical and chemical index enters a semi-manufactured product temporary storage tank (65) through a twenty-ninth pipeline (58) for storage, and after the active substances are ready, the active substances start to pass through a second sterilization system (22) to kill pathogenic bacteria, pathogenic bacteria and spores, so that the product meets the commercial sterile requirement.

After the materials in the first active material mixing tank (19) and the second active material mixing tank (64) are prepared, commercial sterility is achieved through a reversing valve (28), a deep impurity removal filtering device (23) and an absolute sterilization device (24), low-temperature enzyme passivation is carried out through a low-temperature pasteurization system (25), and the safety and quality of the product are ensured through an absolute sterilization combined low-temperature enzyme passivation mode.

The active substances after low-temperature pasteurization are mixed in proportion with the semi-finished products after sterilization by the second sterilization system (22) through a thirty-first pipeline (60) by a static mixer (26) through a centrifugal pump (2), a flow meter (6) and an on-line detection instrument (7), and enter a filling machine (27) for aseptic filling to a specified package after mixing.

The dairy product production line can be used for separating and extracting milk-derived bioactive substances in cow milk through cation exchange, microfiltration percolation (MF), ultrafiltration (UF), nanofiltration (NF) and other membrane devices, and adding the milk-derived bioactive substances into UHT sterilized semi-finished products in an on-line manner after single low-heat sterilization, so that the technical problem of easy thermal denaturation of the milk-derived bioactive substances is solved, the retention of active substances such as immunoglobulin, lactoferrin, alpha-lactalbumin, beta-lactoglobulin and the like is realized, the content of the active substances such as immunoglobulin, lactoferrin, alpha-lactalbumin, beta-lactoglobulin and the like in the dairy products is improved, and the long shelf life storage of the dairy products is realized.

The verification proves that the milk product prepared by the dairy product production line provided by the utility model can reach the following product indexes: 3.6-11.17g/100g of protein, 0.1-6.0g/100g of fat, 0.5-6.5g/100g of lactose, more than 60mg/L of lactoferrin, more than 500mg/L of alpha-lactalbumin, more than 800mg/L of beta-lactoglobulin and more than 100mg/L of immunoglobulin (IgG). The shelf life of the product stored at normal temperature can reach 180 days.

As an exemplary illustration, in one experiment of milk preparation using the dairy product line provided by the present utility model, the active substance preparation and shelf life detection results of the prepared milk product are as follows: protein content 3.86g/100g, fat content 4.22g/100g, lactose content 3.93g/100g, lactoferrin 108mg/L, alpha-lactalbumin 1005mg/L, beta-lactoglobulin 4107mg/L, immunoglobulin (IgG) 279mg/L, shelf life 180 days at normal temperature.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A dairy product production line, characterized in that it comprises: the milk bin (1), the fat separator (4), the cream mixing tank (5), the skim milk degerming device (9), the cation exchange device, the micro-filtration and percolation film device (15), the ultra-filtration and percolation film device (16), the nanofiltration film device (17) and the reverse osmosis film device (18);

The discharging port of the milk bin (1) is connected with the feeding port of the fat separator (4), and the cream discharging port and the skim milk discharging port of the fat separator (4) are respectively connected with the cream mixing tank (5) and the feeding port of the skim milk degerming device (9);

permeate discharge gate of skim milk sterilizing device (9) with the feed inlet of cation exchange device is connected, the permeate discharge gate of cation exchange device with the feed inlet of microfiltration filtration membrane device (15) is connected, the permeate discharge gate of microfiltration filtration membrane device (15) with the feed inlet of ultrafiltration filtration membrane device (16) is connected, the permeate discharge gate of ultrafiltration filtration membrane device (16) with the feed inlet of nanofiltration membrane device (17) is connected, the permeate discharge gate of nanofiltration membrane device (17) with the feed inlet of reverse osmosis membrane device (18) is connected.

2. Dairy production line according to claim 1, characterized in that the retentate outlet of the skim milk sterilization device (9) is connected to the cream mix tank (5);

the production line further comprises a first sterilization system (8);

the discharge port of the cream mixing tank (5) is connected with the feed port of the first sterilization system (8).

3. Dairy production line according to claim 2, characterized in that it further comprises a material temporary storage tank (21);

the utility model discloses a material temporary storage tank, including material temporary storage tank (21), material temporary storage tank, nanofiltration membrane device (17), concentrate discharge gate of first sterilization system (8), concentrate discharge gate of microfiltration filtration membrane device (15), concentrate discharge gate of nanofiltration membrane device (17) permeate discharge gate and concentrate discharge gate of reverse osmosis membrane device (18) are connected through the pipeline jointly with the feed inlet of material temporary storage tank (21).

4. A dairy production line according to claim 3, characterized in that it further comprises a semi-finished product temporary tank (65) and a second sterilization system (22);

5. The dairy production line according to any of claims 1 to 4, characterized in that it further comprises a concentrating and purifying device (63), a first active substance mixing tank (19) and a second active substance mixing tank (64);

the eluent discharge port of the cation exchange device is connected with the feed port of the concentration and purification device (63), the discharge port of the concentration and purification device (63) is connected with the feed port of the second active substance mixing tank (64) and the feed port of the first active substance mixing tank (19), and the concentrate discharge port of the ultrafiltration and diafiltration membrane device (16) is connected with the feed port of the second active substance mixing tank (64) and the feed port of the first active substance mixing tank (19).

6. Dairy production line according to claim 5, characterized in that it further comprises a deep-layer impurity-removing filtration device (23), an absolute sterilization device (24) and a low-temperature pasteurization system (25);

7. The dairy production line according to claim 6, characterized in that it further comprises a static mixer (26) and a filling machine (27);

8. The dairy production line according to any of claims 1 to 4, 6, 7, characterized in that it further comprises a percolate mixing tank (20);

9. Dairy production line according to any of claims 1 to 4, 6, 7, characterized in that the cation exchange means comprise a first cation exchange means (12) and a second cation exchange means (13) of parallel design.

10. Dairy product production line according to any of claims 1-4, 6, 7, characterized in that a vacuum degassing device (10) and a twin screw pump (11) are arranged between the permeate outlet of the skim milk sterilization device (9) and the feed inlet of the cation exchange device.