CN112425650A - Dairy product sterilization equipment and dairy product sterilization method - Google Patents
Dairy product sterilization equipment and dairy product sterilization method Download PDFInfo
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- CN112425650A CN112425650A CN201910790093.5A CN201910790093A CN112425650A CN 112425650 A CN112425650 A CN 112425650A CN 201910790093 A CN201910790093 A CN 201910790093A CN 112425650 A CN112425650 A CN 112425650A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C7/00—Other dairy technology
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C7/00—Other dairy technology
- A23C7/04—Removing unwanted substances other than lactose or milk proteins from milk
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Abstract
The invention provides a dairy product sterilization device and a dairy product sterilization method, wherein the dairy product sterilization device comprises: the contact cavity is provided with a steam adding structure, and steam can enter the contact cavity through the steam adding structure; the liquid film distribution device is arranged at the opening at the top of the contact cavity and is provided with a first conical surface, the first conical surface inclines from the upper end to the lower end from inside to outside, and the dairy product can enter the contact cavity from the top to the bottom along the first conical surface. The invention solves the technical problems of slow temperature rise and easy scaling phenomenon in the prior art for dairy product sterilization.
Description
Technical Field
The invention relates to the technical field of sterilization of fresh liquid milk and products thereof, in particular to a dairy product sterilization device and a dairy product sterilization method.
Background
The milk is inevitably infected with some bacteria in the process from extrusion to collection, and some of the bacteria are pathogenic bacteria. In order to make the vast consumers drink the sterile, healthy and nutritional fresh milk, the milk needs to be sterilized, and especially the pathogenic bacteria need to be inactivated.
Currently, the thermal techniques for sterilization of milk products are pasteurization and ultra-high temperature flash sterilization, both of which require the use of a heat exchanger as the heating device. The pasteurization mainly uses a plate heat exchanger, and the ultra-high temperature sterilization technology uses a shell-and-tube heat exchanger. The two heating devices transfer heat through the heat exchange tubes, have large thermal resistance and slow temperature rise, and are easy to scale in the sterilization process.
Disclosure of Invention
The invention aims to provide dairy product sterilization equipment and a dairy product sterilization method, which are used for solving the technical problems that in the prior art, the temperature rise is slow and the scaling phenomenon is easy to occur in the dairy product sterilization.
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a dairy product sterilization apparatus, comprising: the contact cavity is provided with a steam adding structure, and steam can enter the contact cavity through the steam adding structure; the liquid film distribution device is arranged at an opening at the top of the contact cavity and is provided with a first conical surface, the first conical surface inclines from the upper end to the lower end from inside to outside, and the dairy product can enter the contact cavity from the first conical surface to the bottom.
In a preferred embodiment, the first tapered surface has a conical surface shape.
In a preferred embodiment, the liquid film distribution device further has a second tapered surface connected to a lower end of the first tapered surface, the second tapered surface being inclined from the upper end to the lower end from the inside to the outside; and the taper of the second taper surface is larger than that of the first taper surface.
In a preferred embodiment, the top of the first conical surface is provided with a conical top opening; the liquid film distribution device is also provided with a third conical surface arranged inside the first conical surface, the third conical surface inclines from the upper end to the lower end from inside to outside, and the dairy product can fall onto the third conical surface through the conical top opening.
In a preferred embodiment, a lower end of the third tapered surface is connected to a columnar surface.
In a preferred embodiment, the liquid film distribution device comprises a first flow guide tube, the upper end of the first flow guide tube is connected to the conical top opening, and the opening of the lower end of the first flow guide tube faces the top of the third conical surface.
In a preferred embodiment, the apparatus comprises a second flow duct extending in the up-down direction, the opening of the lower end of the second flow duct being directed towards the first conical surface.
In a preferred embodiment, the apparatus comprises an outer conical cylinder, the upper end of which is connected to the lower end of the second draft tube and which surrounds the first conical surface.
In a preferred embodiment, the distance between the contour of the bottom surface of the liquid film distribution device and the inner wall of the outer conical cylinder along the horizontal direction is in the range of 2mm to 6 mm.
In a preferred embodiment, the vapor adding structure comprises an annular vapor distribution disc, the vapor distribution disc is arranged at the opening at the top of the contact cavity, and the outline of the bottom surface of the liquid film distribution device is smaller than the central hole of the vapor distribution disc; the steam distribution disc is provided with a plurality of air outlet holes communicated with the contact cavity and steam inlets communicated with the air outlet holes.
In a preferred embodiment, each of the air outlet holes is arranged downward.
In a preferred embodiment, the outlet holes are evenly circumferentially distributed about the axis of the steam distribution disc.
In a preferred embodiment, the distance from the bottom surface of the liquid film distribution means to the lower end surface of the vapor distribution plate is in the range of 8mm to 12 mm.
In a preferred embodiment, the bottom surface of the liquid film distribution means is flush with the lower end surface of the vapor distribution plate.
The invention provides a dairy product sterilization method, which applies the dairy product sterilization equipment and comprises the following steps: step S10, introducing steam into the contact cavity through the steam adding structure; and step S20, feeding the dairy product to be sterilized into the contact cavity through the liquid film distribution device.
The invention has the characteristics and advantages that:
when the dairy product sterilization equipment provided by the invention is used for sterilization, high-temperature steam is introduced into the contact cavity through the steam adding structure, so that the contact cavity is filled with the high-temperature steam. The dairy product to be sterilized is sent to the top of the first conical surface, the dairy product to be sterilized flows downwards along the first conical surface, the dairy product to be sterilized is gradually spread into a film shape and then falls into the contact cavity, a cylindrical dairy product film is formed in the contact cavity, the inner side surface and the outer side surface of the dairy product film are in direct contact with high-temperature steam, heat is transferred at a gas-liquid contact interface, the specific surface area of heat exchange is increased, thermal resistance is small, transfer efficiency is higher, heat transfer and mass transfer are completed in a short time, a good sterilization effect is realized, and scaling of the dairy product is not easy to occur, so that the technical problems that the temperature rise is slow and scaling is easy to occur in dairy product sterilization in the prior art are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dairy product sterilization apparatus provided by the present invention;
FIG. 2 is a schematic diagram of the structure of a liquid film distribution device in the dairy sterilization apparatus shown in FIG. 1;
fig. 3 is a top view of a steam distribution tray in the dairy sterilization apparatus shown in fig. 1;
fig. 4 is a cross-sectional view of a steam distribution tray in the dairy sterilization apparatus shown in fig. 1;
fig. 5 is a schematic diagram of a dairy sterilization method provided by the present invention.
The reference numbers illustrate:
10. a contact cavity; 11. a dairy product outlet; 111. an outlet line; 12. a heat-insulating layer;
20. a steam addition structure; 21. a steam distribution tray; 211. an air outlet; 212. a steam inlet; 213. a central bore;
30. a liquid film distribution device; 31. a first tapered surface; 311. opening the cone top; 32. a second tapered surface; 33. a third conical surface; 34. a columnar surface; 35. a first draft tube;
41. a second draft tube; 42. an outer conical cylinder; 43. a support rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, the heat exchanger transfers heat through the heat exchange tube, on one hand, the heat exchanger has larger thermal resistance and lower heat transfer efficiency; on the other hand, the dairy products are in contact with the side wall of the heat exchange tube, the temperature of the side wall of the heat exchange tube is high, the dairy products are heated locally and unevenly, the dairy products in direct contact with the side wall of the heat exchange tube are easy to denature, and scaling occurs on the side wall of the heat exchange tube.
In order to solve the above problems, the present invention provides a dairy sterilization apparatus and a dairy sterilization method.
Example one
As shown in fig. 1, the dairy sterilization apparatus includes: a contact chamber 10 and a liquid film distribution means 30; the contact chamber 10 is provided with a steam adding structure 20, and steam can enter the contact chamber 10 through the steam adding structure 20; the liquid film distribution means 30 is arranged at the opening at the top of the contact chamber 10 and has a first conical surface 31, the first conical surface 31 is inclined from the upper end to the lower end from inside to outside, and the dairy product can flow downwards along the first conical surface 31 from the top to the bottom and enter the contact chamber 10 through the opening at the top of the contact chamber 10. When the dairy product sterilization equipment is used for sterilization, high-temperature steam is introduced into the contact cavity 10 through the steam adding structure 20, so that the contact cavity 10 is filled with the high-temperature steam. The dairy product to be sterilized is conveyed to the top of the first conical surface 31, the dairy product to be sterilized flows downwards along the first conical surface 31, gradually spreads into a film shape, then falls into the contact cavity 10, a cylindrical dairy product film is formed in the contact cavity 10, the inner side surface and the outer side surface of the dairy product film are in direct contact with high-temperature steam, heat is transferred at a gas-liquid contact interface, heat resistance is low, the specific surface area of heat exchange is increased, transfer efficiency is high, and heat transfer and mass transfer are completed in a short time.
In the contact chamber 10, on one hand, the instantaneous heat and mass transfer process generates larger pressure fluctuation, the collapse of steam bubbles can generate cavities instantly, surrounding liquid can be quickly supplemented, the impact on the liquid is caused, the impact shearing force acts on the cell wall of bacteria, the cell wall of the bacteria is broken, the content of the bacteria cell flows outwards, and the bacteria lose activity. On the other hand, the high-efficiency heat transfer raises the temperature of the dairy product, and the dairy product flows in the contact cavity 10, so that the dairy product is kept in a high-temperature environment for a period of time to achieve sterilization strength. Therefore, through the dairy product sterilization equipment, a good sterilization effect can be realized.
In this dairy product sterilization equipment, dairy product flows down along first conical surface 31 at first, and in the in-process that flows down, can take away the heat on the first conical surface 31, keeps lower problem on making the first conical surface 31, consequently, when dairy product and first conical surface 31 contact, be difficult to take place to deteriorate to scaling has been avoided appearing on first conical surface 31. After entering the contact chamber 10, the milk flows downwards under the action of self gravity and is not in direct contact with the side wall of the contact chamber 10, thereby reducing the occurrence of scaling phenomenon.
The first conical surface 31 guides the flow of the milk, so that the milk gradually spreads into a film in the process of flowing downwards. Preferably, the first conical surface 31 is conical, which is beneficial to forming a cylindrical film with more uniform thickness after the dairy product falls into the contact cavity 10, so that the dairy product is heated more uniformly and uniformly, and the stability of the sterilization effect is ensured.
In an embodiment of the present invention, the liquid film distribution device 30 further has a second tapered surface 32 connected to the lower end of the first tapered surface 31, the second tapered surface 32 being inclined from the upper end to the lower end from the inside to the outside; and, the taper of the second tapered surface 32 is larger than the taper of the first tapered surface 31. Specifically, the first tapered surface 31 and the second tapered surface 32 are both conical surface-shaped, and the diameter of the lower end of the first tapered surface 31 is equal to the diameter of the upper end of the second tapered surface 32. The taper of the first tapered surface 31 is an included angle β between an intersection line of a plane passing through the axis of the first tapered surface 31 and the axis of the first tapered surface 31; the taper of the second tapered surface 32 refers to an angle γ between an intersection line of a plane passing through the axis of the second tapered surface 32 and the axis of the second tapered surface 32. In the present embodiment, the axis of the first tapered surface 31 coincides with the axis of the second tapered surface 32. Beta < gamma, so, compared with the horizontal plane, the inclination angle of second conical surface 32 is less than first conical surface 31, and is more gentle, and dairy products flow to second conical surface 32 from first conical surface 31, can reduce the minute speed of dairy products along vertical direction, slows down the flow velocity of dairy products in contacting chamber 10 on the one hand, is favorable to dairy products and steam fully to contact, and the gentle velocity of flow of on the other hand is favorable to making the thickness of the cylindric dairy products film that forms more even.
In one embodiment of the present invention, the top of the first tapered surface 31 is provided with a cone top opening 311; the liquid film distribution means 30 further has a third conical surface 33 arranged inside the first conical surface 31, the third conical surface 33 is inclined from the upper end to the lower end from the inside to the outside, and the milk product can fall onto the third conical surface 33 through the cone top opening 311.
The milk is delivered to the top of the first conical surface 31, and is divided by the conical top opening 311, a part of the milk flows downwards along the first conical surface 31, and a part of the milk enters the conical top opening 311, passes through the first conical surface 31, falls to the third conical surface 33, and then flows downwards along the third conical surface 33. The milk flowing along the first conical surface 31 forms a cylindrical milk film with larger size in the contact chamber 10; the milk flowing along the third conical surface 33 forms a cylindrical milk film having a small size in the contact chamber 10, and the cylindrical milk film having a small size is surrounded by a cylindrical milk film having a large size.
By arranging the third conical surface 33, on one hand, an inner layer dairy film and an outer layer dairy film can be formed in the contact cavity 10, and the inner side surface and the outer side surface of each layer dairy film are in direct contact with steam, so that the sterilization efficiency of dairy products can be improved; on the other hand, the cone top opening 311 diverts a portion of the milk onto the third conical surface 33, which helps to avoid the milk from forming a pile on the first conical surface 31 when the milk is added at a faster rate, which is beneficial to ensure that the thickness of the milk film in the contact chamber 10 is more uniform and stable.
Preferably, the third conical surface 33 is conical in shape, so that the thickness of the cylindrical dairy film formed by flowing along the third conical surface 33 is more uniform.
Further, a cylindrical surface 34 is connected to a lower end of the third tapered surface 33, and an outer diameter of the cylindrical surface 34 is equal to a diameter of a lower end of the third tapered surface 33. The milk flows along the third conical surface 33 onto the cylindrical surface 34. the cylindrical surface 34 can make the thickness of the formed cylindrical milk film more uniform.
As shown in fig. 1 and 2, the liquid film distribution device 30 includes a first flow guide tube 35, an upper end of the first flow guide tube 35 is connected to the conical top opening 311, an opening of a lower end of the first flow guide tube 35 faces the top of the third conical surface 33, and the first flow guide tube 35 guides the milk product to the top of the third conical surface 33, which is beneficial to improving the spreading effect of the third conical surface 33 on the milk product, so that the milk product flows to the contact chamber along the third conical surface 33 more smoothly.
In an embodiment of the present invention, the milk sterilization apparatus comprises a second flow tube 41 extending in a vertical direction, the opening of the lower end of the second flow tube 41 faces the first conical surface 31, the inner diameter of the second flow tube 41 is larger than the inner diameter of the conical top opening 311, and is also larger than the inner diameter of the first flow tube 35, and is larger than the outer diameter of the top of the first conical surface 31. The second draft tube 41 directs milk to the top of the first conical surface 31. The second flow guide tube 41 is a round tube, which is beneficial to enabling the dairy product to flow uniformly along the first conical surface 31 in all directions, and optimizing the spreading effect of the first conical surface 31 on the dairy product.
Further, this dairy product sterilization equipment includes outer cone 42, and the upper end of outer cone 42 is connected in the lower extreme of second honeycomb duct 41 to outer cone 42 surrounds first conical surface 31, is equipped with the clearance between the inner wall of outer cone 42 and first conical surface 31 for the emulsion smoothly flows through, and outer cone 42 can keep apart the exterior space, reduces the harmful interference of external environment to dairy products. Preferably, the outer tapered barrel 42 is a conical barrel.
Preferably, the axis of the first conical surface 31, the axis of the second conical surface 32, the axis of the third conical surface 33, the axis of the cylindrical surface 34, the axis of the first draft tube 35, the axis of the second draft tube 41 and the axis of the outer conical cylinder 42 are all arranged in the vertical direction and all coincide.
As shown in FIG. 1, the distance in the horizontal direction between the contour of the bottom surface of the liquid film distribution unit 30 and the inner wall of the outer tapered cylinder 42 is denoted as L1. The milk product leaves the liquid film distribution means 30 when it flows down along the liquid film distribution means 30 to the bottom surface of the liquid film distribution means 30. In the liquid film distribution device shown in fig. 1 and 2, the contour of the bottom surface of the liquid film distribution device 30 refers to the lower boundary line of the second tapered surface 32; when the second tapered surface 32 has a conical shape, the contour of the bottom surface of the liquid film distribution device 30 is a circle of the lower end of the second tapered surface 32.
The milk needs to pass through the gap between the contour of the bottom surface of the liquid film distribution means 30 and the inner wall of the outer cone 42, by a distance L1Has the function of adjusting the thickness of the formed cylindrical milk slice film. When the diameter of the L is less than or equal to 2mm1When less than or equal to 6mm, the milk product can be ensured to pass through at a higher speed, and meanwhile, the thickness of the formed cylindrical milk slice film is more uniform, which is beneficial to sterilization in the contact cavity 10.
The contact of high pressure steam and dairy products takes place at the in-process that the dairy products film descends, through the height of adjustment contact chamber 10, can control the descending height of dairy products film to adjust and control the time of being heated of dairy products.
The specific structure and operation of the liquid film distribution means 30 have been described above, and the vapor adding structure 20 will be described in detail.
As shown in fig. 1, 3 and 4, the vapor adding structure 20 includes a vapor distribution plate 21 having a ring shape, the vapor distribution plate 21 is disposed at the opening of the top of the contact chamber 10, and the bottom surface of the liquid film distribution device 30 has a profile smaller than the central hole of the vapor distribution plate 21; the steam distribution plate 21 is provided with a plurality of outlet holes 211 communicating with the contact chamber 10, and steam inlets 212 communicating with the respective outlet holes 211.
Specifically, the steam distribution plate 21 is fixedly connected to the upper end surface of the contact chamber 10; the liquid film distribution device 30 is fixedly connected with the contact chamber 10 through a support rod 43. The contour of the bottom surface of the liquid film distribution means 30 is smaller than the central hole 213 of the steam distribution disc 21 so that milk can pass through the central hole 213 of the steam distribution disc 21 and fall into the contact chamber 10. When the center hole 213 of the steam distribution disk 21 is a circular hole and the second tapered surface 32 is a conical surface, the diameter of the lower end of the second tapered surface 32 is smaller than the diameter of the center hole 213 of the steam distribution disk 21.
A pipe for delivering high-temperature steam is communicated with the steam inlet 212, and the high-temperature steam flows to each of the steam outlet holes 211 through the steam inlet 212 and enters the contact chamber 10 through each of the steam outlet holes 211, so that the contact chamber 10 is uniformly filled with the high-temperature steam. In the contact cavity 10, the steam particles move irregularly, contact and collide with the dairy product to generate phase change heat exchange, the steam is condensed into water and releases heat, and the dairy product is heated instantly in the process, so that the strains are inactivated.
An annular groove is provided in the steam distribution disc 21, with which the steam inlet 212 and each of the air outlet holes 211 communicate. Preferably, the steam inlet 212 is provided at an outer wall of the steam distribution plate 21; the steam inlet 212 is provided in plural, and the plural steam inlets 212 are circumferentially distributed around the axis of the steam distribution plate 21. The high temperature steam is continuously fed into the contact chamber 10 through the steam distribution plate 21, which is advantageous in ensuring the stability of the temperature in the contact chamber 10.
In one embodiment of the present invention, the steam inlet 212 is configured with a valve to control the flow of steam into the steam distribution plate 21.
The outer conical cylinder 42 is fixedly connected with the upper end face of the steam distribution disc 21, and a relatively closed space can be formed through the outer conical cylinder 42, the steam distribution disc 21 and the contact cavity 10, so that the humidity and the temperature in the closed space can be kept stable, and the interference of the external environment is reduced.
Further, the respective air outlet holes 211 are uniformly circumferentially distributed around the axis of the steam distribution plate 21; and, each of the outlet holes 211 may be distributed one or more times around the axis of the steam distribution plate 21.
Further, each air outlet hole 211 is arranged on the lower end surface of the steam distribution disc 21, and an opening of each air outlet hole 211 faces downward. The dead weight of the high-temperature steam particles is smaller, so that the high-temperature steam particles have the tendency of moving upwards; the opening of venthole 211 sets up downwards, helps making from the high temperature steam follow venthole 211 and discharges the back downstream for high temperature steam is full of and contacts chamber 10, ensures the homogeneity of high temperature steam distribution and the stability of temperature in contacting chamber 10.
In one embodiment of the present invention, as shown in fig. 1, the bottom surface of the liquid film distribution device 30 is located above the steam distribution plate 21, and the distance from the bottom surface of the liquid film distribution device 30 to the lower end surface of the steam distribution plate 21 is denoted by L2Preferably, 8mm ≦ L2Less than or equal to 12mm, so as to reduce the contact between the liquid film distribution device 30 and high-temperature steam, thus being beneficial to keeping the liquid film distribution device 30 at a lower temperature and avoiding the scaling of the dairy products caused by denaturation when the dairy products flow on the liquid film distribution device 30.
In another embodiment of the present invention, the bottom surface of the liquid film distribution device 30 is flush with the lower end surface of the vapor distribution plate 21, i.e. both surfaces are located on the same plane. Make dairy products from the liquid film distribution device 30 after the descending, promptly with the steam contact from steam distribution dish 21, carry out the heat transfer to increase dairy products and steam contact's area, increased heat transfer area, be favorable to improving heat exchange efficiency, reduce the volume area of equipment.
As shown in fig. 1, a milk discharge port 11 is formed at the bottom of the contact chamber 10, and the inner diameter of the milk discharge port 11 is gradually reduced from the upper end to the lower end, so that milk sterilized in the contact chamber 10 is discharged downward. The milk outlet 11 is located at the bottom of the contacting chamber 10 so that the steam is moving generally from top to bottom within the contacting chamber 10, helping to fill the contacting chamber 10 with steam. Further, an outlet line 111 is connected to the lower end of the milk outlet 11.
In another embodiment of the present invention, the side wall of the contact chamber 10 is provided with an insulating layer 12 to reduce heat loss and keep the temperature in the contact chamber 10 balanced.
Example two
The dairy sterilization method provided by the invention applies the dairy sterilization equipment, as shown in fig. 5, and comprises the following steps:
step S10, introducing steam into the contact chamber 10 through the steam adding structure 20;
step S20, the dairy product to be sterilized is fed into the contact chamber 10 through the liquid film distribution means 30.
Filling the contact chamber 10 with high-temperature steam through step S10; then step S20 is performed, the dairy product to be sterilized is spread into a cylindrical film by the liquid film distribution device 30, the film moves downwards in the contact chamber 10 and contacts with the steam; step S10 is continuously performed. The phase change heat exchange and heat and mass transfer are carried out between the dairy product and the steam, the dairy product can be instantly raised to 141 ℃ from 85 ℃, the effective sterilization is realized, and the technical problems of slow temperature rise and easy scaling phenomenon existing in the sterilization of the dairy product in the prior art are solved.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (15)
1. A dairy sterilization apparatus, comprising:
the contact cavity is provided with a steam adding structure, and steam can enter the contact cavity through the steam adding structure;
the liquid film distribution device is arranged at an opening at the top of the contact cavity and is provided with a first conical surface, the first conical surface inclines from the upper end to the lower end from inside to outside, and the dairy product can enter the contact cavity from the first conical surface to the bottom.
2. Milk sterilization apparatus according to claim 1, wherein the first conical surface is conical surface shaped.
3. The dairy sterilization apparatus of claim 2, wherein the liquid film distribution device further has a second tapered surface connected to a lower end of the first tapered surface, the second tapered surface being inclined from an upper end to a lower end from inside to outside;
and the taper of the second taper surface is larger than that of the first taper surface.
4. Dairy sterilisation apparatus according to claim 1, wherein the top of said first conical surface is provided with a cone top opening; the liquid film distribution device is also provided with a third conical surface arranged inside the first conical surface, the third conical surface inclines from the upper end to the lower end from inside to outside, and the dairy product can fall onto the third conical surface through the conical top opening.
5. Milk sterilisation apparatus according to claim 4, characterised in that a cylindrical surface is connected to the lower end of said third conical surface.
6. Milk sterilization apparatus according to claim 4, wherein the liquid film distribution means comprises a first flow duct, the upper end of which is connected to the conical top opening, the opening of the lower end of which is directed towards the top of the third conical surface.
7. Milk sterilization apparatus according to claim 1, characterized in that the apparatus comprises a second flow duct extending in an up-and-down direction, the lower end of which opens towards the first conical surface.
8. Milk sterilization apparatus according to claim 7, wherein the apparatus comprises an outer conical drum, the upper end of which is connected to the lower end of the second flow conduit and which surrounds the first conical surface.
9. Milk sterilization apparatus according to claim 8, wherein the distance in horizontal direction between the contour of the bottom surface of the liquid film distribution means and the inner wall of the outer cone is in the range of 2mm-6 mm.
10. The dairy sterilization apparatus of any one of claims 1-9, wherein the steam addition structure comprises a steam distribution plate having an annular shape, the steam distribution plate being disposed at the opening at the top of the contact chamber, the liquid film distribution device having a bottom surface with a profile smaller than a central hole of the steam distribution plate;
the steam distribution disc is provided with a plurality of air outlet holes communicated with the contact cavity and steam inlets communicated with the air outlet holes.
11. Milk sterilisation apparatus according to claim 10, wherein each of said air outlet holes is downwardly disposed.
12. Milk sterilisation apparatus according to claim 10, wherein each of the air outlet holes is evenly circumferentially distributed around the axis of the steam distribution disc.
13. Milk sterilisation apparatus according to claim 10, wherein the distance of the bottom surface of the liquid film distribution means from the lower end surface of the steam distribution disc is in the range 8mm-12 mm.
14. Milk sterilisation apparatus according to claim 10, wherein a bottom surface of the liquid film distribution means is flush with a lower end surface of the steam distribution disc.
15. A method for sterilizing dairy products, characterized in that use is made of a dairy sterilization apparatus according to any one of claims 1 to 14, comprising:
step S10, introducing steam into the contact cavity through the steam adding structure;
and step S20, feeding the dairy product to be sterilized into the contact cavity through the liquid film distribution device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790093.5A CN112425650A (en) | 2019-08-26 | 2019-08-26 | Dairy product sterilization equipment and dairy product sterilization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790093.5A CN112425650A (en) | 2019-08-26 | 2019-08-26 | Dairy product sterilization equipment and dairy product sterilization method |
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| CN112425650A true CN112425650A (en) | 2021-03-02 |
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| CN201910790093.5A Pending CN112425650A (en) | 2019-08-26 | 2019-08-26 | Dairy product sterilization equipment and dairy product sterilization method |
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| US5419814A (en) * | 1992-10-29 | 1995-05-30 | Idemitsu Kosan Corporation Limited | Thin layer liquid film type evaporator |
| CN108970158A (en) * | 2018-09-14 | 2018-12-11 | 江苏拓驰工程技术开发有限公司 | A kind of Double-scraper luwa evaporator |
| CN208611814U (en) * | 2018-05-09 | 2019-03-19 | 常州都铂高分子有限公司 | A kind of falling film type film evaporator |
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2019
- 2019-08-26 CN CN201910790093.5A patent/CN112425650A/en active Pending
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| US5419814A (en) * | 1992-10-29 | 1995-05-30 | Idemitsu Kosan Corporation Limited | Thin layer liquid film type evaporator |
| CN208611814U (en) * | 2018-05-09 | 2019-03-19 | 常州都铂高分子有限公司 | A kind of falling film type film evaporator |
| CN108970158A (en) * | 2018-09-14 | 2018-12-11 | 江苏拓驰工程技术开发有限公司 | A kind of Double-scraper luwa evaporator |
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Application publication date: 20210302 |