Scraper type liquid food ultraviolet sterilization device

Abstract

The application relates to the technical field of food mechanical processing, in particular to a scraper type liquid food ultraviolet sterilization device, which comprises a bearing seat, wherein a motor reducer is installed on one side of a shell, and a quartz sleeve is installed in the shell to separate a cavity into a first chamber and a second chamber; a plurality of ultraviolet lamp tube arrays are distributed in the first chamber; a liquid distribution disc is installed on a main shaft and has a gap with the quartz sleeve, so as to separate the second chamber into a communicated material liquid dispersion chamber and a third chamber, wherein a plurality of notches are arranged on the periphery of the liquid distribution disc; a plurality of scrapers are installed on the main shaft and have a gap with the quartz sleeve, under the rotation and scraping of the scrapers, liquid food forms a film in the gap, a turbulent liquid film and a vortex are formed in the notches and move downwards, an extremely thin liquid film is formed through the rotation and scraping of the scrapers in the downward flow process, and the vortex and the turbulent liquid film generated during the scraping can accelerate the surface renewal speed of the material liquid and overcome the shortcoming that the ultraviolet light has weak penetration ability.

Description

Technical Field

[0001] This invention relates to the field of food processing machinery, and in particular to a scraper-type ultraviolet sterilization device for liquid food. Background Technology

[0002] Currently, in industrial production, the sterilization of liquid foods such as fruit juice, milk, and red wine typically employs relatively mature heat sterilization processes, such as ultra-high temperature (UHT) sterilization, which is widely used in food factories. While heat sterilization has the advantages of rapid sterilization and high efficiency, its disadvantages are also particularly prominent, including high energy consumption, high maintenance costs, damage to the nutritional components of food, and negative impact on the flavor and taste of food.

[0003] As a cold sterilization process, ultraviolet sterilization has a much lower cost and energy consumption than heat sterilization. At the same time, the sterilization process does not generate heat, making it very suitable for some heat-sensitive materials. It can effectively sterilize food without damaging its nutritional components, thus effectively protecting the color, aroma and flavor of the food.

[0004] Currently, most ultraviolet sterilization technologies on the market are used for drinking water sterilization, air sterilization, and surface sterilization. There are few reports on their application in the field of liquid food sterilization. The main reason for this is that ultraviolet light has very weak penetrating power. When irradiating liquids with low transparency, such as milk and juice, it can only achieve surface sterilization and cannot penetrate into the interior of the liquid. Summary of the Invention

[0005] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention proposes a scraper-type ultraviolet sterilization device for liquid food.

[0006] The technical solution of the present invention is as follows: A scraper-type ultraviolet sterilization device for liquid food, comprising: The shell has a cavity; The bearing housing is mounted on one side of the housing; A motor reducer is mounted on the bearing housing, and the output end of the motor reducer is connected to a main shaft. A quartz sleeve is installed inside the housing to divide the cavity into a first chamber and a second chamber; Multiple ultraviolet lamps are arrayed in the first chamber, and each ultraviolet lamp is fixedly connected to the housing; A liquid distribution plate is installed on the main shaft and has a gap between it and the quartz sleeve to divide the second chamber into a communicating liquid dispersion chamber and a third chamber, wherein the liquid distribution plate has multiple notches on its periphery; Multiple scrapers are installed on the main shaft located in the third chamber and have a gap between them and the quartz sleeve. Under the scraping motion of the rotating scrapers, the liquid food forms a thin film in the gap. A turbulent liquid film and vortex move downwards in the gap, which can accelerate the surface renewal speed of the liquid and overcome the disadvantage of weak ultraviolet penetration. A feed pipe is installed on the housing and communicates with the liquid dispersion chamber; The discharge pipe is installed on the housing and communicates with the third chamber.

[0007] In one possible technical solution, the liquid distribution tray further includes: The base plate has a through hole in the middle, and the cross-section of the base plate is sloping, with its height gradually decreasing as it deviates from the direction of the through hole. An edge ring is installed on the periphery of the base plate, and the edge ring has multiple notches at equal intervals.

[0008] In one possible technical solution, the scrapers are further arranged in a circular array on the main shaft, with each scraper corresponding to one notch.

[0009] In one possible technical solution, the outer diameter of the scraper's circumscribed circle is equal to the outer diameter of the liquid distribution plate.

[0010] In one possible technical solution, the notch is further shaped like a V, and the bottom end of the notch is aligned with the position of the scraper.

[0011] In one possible technical solution, the scrapers are further arranged at equal intervals on the main shaft, with the angle between the tilting direction and the rotation direction being an obtuse angle. When the scrapers are scraping, the liquid flow time can be extended, and the liquid is continuously irradiated by the ultraviolet lamps 5 distributed outside the quartz sleeve 4, achieving a good sterilization effect.

[0012] In one possible technical solution, the number of ultraviolet lamps, notches, and scrapers are equal, which can accelerate the surface renewal speed of the liquid, overcome the disadvantage of weak ultraviolet penetration, and improve the sterilization effect.

[0013] In one possible technical solution, both the liquid distribution tray and the scraper are made of PTFE material, which has excellent properties such as food grade, acid and alkali resistance, and high and low temperature resistance.

[0014] In one possible technical solution, both the housing and the feed pipe are made of 304 stainless steel.

[0015] In one possible technical solution, the ultraviolet lamp is further described as a single-ended four-pin ultraviolet lamp with an ultraviolet wavelength of 253.7nm.

[0016] According to the scraper-type ultraviolet sterilization device for liquid food of the present invention, the liquid food enters the dispersion chamber through the synchronous rotation of the distribution plate and the scraper. Under the rotation of the distribution plate, the liquid food is evenly distributed around the chamber and flows into the gap between the scraper and the quartz sleeve through the V-shaped notch. During the downward flow, the rotating scraper forms an extremely thin liquid film, and the vortex and turbulent liquid film generated during the scraping accelerate the surface renewal rate of the liquid, overcoming the weakness of ultraviolet light penetration. By setting the scraper at an angle, the liquid flow time can be extended, and the liquid is continuously irradiated by ultraviolet lamps distributed outside the quartz sleeve, achieving a good sterilization effect. This invention can be widely applied to the cold sterilization process of liquid foods such as fruit juice, milk, and red wine.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may become apparent by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an overall schematic diagram of a scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the liquid distribution tray structure of the scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the liquid distribution tray of the scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the scraper connection of a scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention; Figure 6 This is a top view of the scraper installation of the scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the state of liquid food during the scraping process of the scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention. Figure 8 This is an enlarged schematic diagram showing the state of liquid food near the notch during the scraping process of the scraper-type liquid food ultraviolet sterilization device according to an embodiment of the present invention.

[0020] Figure label: 1. Housing; 2. Bearing seat; 3. Motor reducer; 3. Main shaft; 31. Quartz sleeve; 4. Ultraviolet lamp; 5. Liquid distribution tray; 6. Base plate; 60. Edge ring; 61. Notch; 610. Liquid dispersion chamber; 7. Scraper; 8. Feed pipe; 9. Discharge pipe; 10. Liquid film 100, vortex 200, turbulent liquid film 300. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, it may include a series of steps or units, or optionally, steps or units not listed, or other steps or units inherent to these processes, methods, products, or devices.

[0025] The accompanying drawings show only the portions relevant to this application, not all of them. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations may be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0026] The terms “component,” “module,” “system,” “unit,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, a thread of execution, a program, and / or distributed between two or more computers. Furthermore, these units can be executed from various computer-readable media on which various data structures are stored. Units can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from a second unit interacting with another unit between a local system, a distributed system, and / or a network; for example, the Internet interacting with other systems via signals).

[0027] Example 1 like Figures 1 to 8 As shown, this embodiment provides a scraper-type ultraviolet sterilization device for liquid food, which includes: Shell 1, having a cavity; Bearing housing 2 is installed on one side of the housing 1; The motor reducer 3 is mounted on the bearing housing 2. The output end of the motor reducer 3 is connected to the main shaft 31. It should be noted that in this embodiment, the motor reducer 3 can adjust the speed according to different situations and is not limited to single speed control. Quartz sleeve 4 is installed inside the housing 1 to divide the cavity into a first chamber and a second chamber; Multiple ultraviolet lamps 5 are arrayed in the first chamber, and each ultraviolet lamp 5 is fixedly connected to the housing 1. Each ultraviolet lamp 5 is a single-ended four-pin ultraviolet lamp with an ultraviolet wavelength of 253.7nm. A liquid distribution plate 6 is mounted on the main shaft 31 and has a gap between it and the quartz sleeve 4 to divide the second chamber into a communicating liquid dispersion chamber 7 and a third chamber. The liquid distribution plate 6 has multiple notches 610 (including but not limited to 12 notches) on its periphery. The liquid distribution plate 6 includes: The base plate 60 has a through hole in the middle, and the cross-section of the base plate 60 is sloping, with its height gradually decreasing as it deviates from the direction of the through hole. An edge ring 61 is installed around the base plate 60, and the edge ring 61 has multiple notches 610 at equal intervals.

[0028] Multiple scrapers 8 are mounted on the main shaft 31 located in the third chamber and have gaps between them and the quartz sleeve 4. Under the rotation and scraping action of the scrapers 8, liquid food forms a thin film within the gaps (such as...). Figure 7 and Figure 8 As shown), a turbulent liquid film forms in the notch 610 and vortices move downwards (as shown). Figure 8 As shown in the figure, it can accelerate the surface renewal rate of the liquid and overcome the disadvantage of weak ultraviolet penetration. The feed pipe 9 is installed on the housing 1 and communicates with the liquid dispersion chamber 7, wherein both the housing 1 and the feed pipe 9 are made of 304 stainless steel.

[0029] The discharge pipe 10 is installed on the housing 1 and communicates with the third chamber.

[0030] It should be noted that in this embodiment, the scrapers 8 are mounted in a circular array on the main shaft 31, and each scraper 8 corresponds to one notch 610.

[0031] It should be noted that, in this embodiment, the outer diameter of the scraper 8 is equal to the outer diameter of the liquid distribution plate 6.

[0032] It should be noted that in this embodiment, the notch 610 is V-shaped, and the bottom end of the notch 610 is aligned with the position of the scraper 8.

[0033] It should be noted that in this embodiment, the scraper 8 is inclinedly arranged at equal intervals on the main shaft 31, and the angle between the inclination direction and the rotation direction is an obtuse angle. When the scraper 8 scrapes, it can prolong the liquid flow time. The liquid is continuously irradiated by the ultraviolet lamp tube 5 distributed outside the quartz sleeve 4, achieving a good sterilization effect.

[0034] It should be noted that in this embodiment, the number of ultraviolet lamps 5, notches 610 and scrapers 8 are equal, which can accelerate the surface renewal speed of the liquid, overcome the disadvantage of weak ultraviolet penetration, and improve the sterilization effect.

[0035] It should be noted that in this embodiment, both the liquid distribution plate 6 and the scraper 8 are made of PTFE material, which has excellent properties such as food grade, acid and alkali resistance, and high and low temperature resistance.

[0036] To verify the beneficial effects of the present invention, the following specific implementation examples are provided in this embodiment: (1) Taking Yili brand whole milk pasteurized milk as an example: Take 20L of Yili brand whole pasteurized milk and inoculate it with Bacillus subtilis CICC 10071 until the concentration reaches the target level. Milk is pumped into the device from the feed inlet using a pump. It enters the feed dispersion chamber 7 through the feed pipe 9 and flows evenly to the surroundings under the rotation of the distribution plate 6. It then flows into the gap between the scraper 8 and the quartz sleeve 6 through the V-shaped notch of the distribution plate 6. Under the scraping action of the rotating scraper 10, a thin film 100 is formed in the gap between the scraper 10 and the quartz sleeve 4. A turbulent liquid film 300 and a vortex 200 are formed at the V-shaped notch. During the downward flow, it is continuously irradiated by the ultraviolet lamp tube 5. After flowing out of the gap, it is received by the discharge pipe 10.

[0037] In this implementation example, the UV lamp 5 has a power of 320W, a diameter of 25mm, a length of 1.5m, and a quantity of 12 lamps. The installation is as follows... Figure 7 arrangement; The bottom plate 60 of the liquid distribution tray 6 has a slope of 15°; The quartz sleeve 4 has a thickness of 2mm, a diameter of 300mm, and a height of 1.6m; The scraper 10 has a height of 1.5m, an inclination angle of 3°, a rotation speed of 200rpm, and a quantity of 12 pieces; The gap between the scraper 10 and the quartz sleeve 6 is 0.5mm, meaning the thickness of the scraped liquid film is 0.5mm.

[0038] The feed rate is controlled at 4L / min, and all milk is processed in 5 minutes.

[0039] The number of Bacillus subtilis CICC10071 in treated milk was determined according to the plate count method of national standard GB / T26428-2010. The results were as follows: It can be seen that the device can reduce Bacillus subtilis by 6-7 log, and the sterilization effect is significant.

[0040] (1) Taking kiwi juice as an example: 40 kg of fresh kiwifruit was selected and subjected to washing, wet crushing, and 100-mesh filtration. The cloudy kiwifruit juice was collected and centrifuged at 2000 rpm for 15 minutes to obtain 10 L of clear kiwifruit juice. This juice was then sterilized via UHT (141℃, 5 s) and hot-filled in a sterile filling room. After the liquid temperature cooled to room temperature, it was inoculated with E. coli W1485 to a concentration of [missing value]. Kiwi juice is pumped into the device from the liquid inlet using a pump. It enters the liquid dispersion chamber 7 through the feed pipe 9 and flows evenly to the surroundings under the rotation of the liquid distribution plate 6. Then, it flows into the gap between the scraper 8 and the quartz sleeve 6 through the V-shaped notch of the liquid distribution plate 6. Under the scraping action of the rotating scraper 10, a thin film 100 is formed in the gap between the scraper 10 and the quartz sleeve 4. A turbulent liquid film 300 and a vortex 200 are formed at the V-shaped notch. During the downward flow, it is continuously irradiated by the ultraviolet lamp tube 5. After flowing out of the gap, it is received by the discharge pipe 10.

[0041] In this implementation example, the UV lamp 5 has a power of 320W, a diameter of 25mm, a length of 1.5m, and a quantity of 12 lamps. The installation is as follows... Figure 7 arrangement; The bottom plate 60 of the liquid distribution tray 6 has a slope of 15°; The quartz sleeve 4 has a thickness of 2mm, a diameter of 300mm, and a height of 1.6m; The scraper 10 has a height of 1.5m, an inclination angle of 3°, a rotation speed of 200rpm, and a quantity of 12 pieces; The gap between the scraper 10 and the quartz sleeve 6 is 0.5mm, meaning the thickness of the scraped liquid film is 0.5mm.

[0042] The feed rate of the feed pipe is controlled at 2L / min, and the kiwi juice is processed in 5 minutes.

[0043] The number of Escherichia coli W1485 in the treated kiwifruit juice was determined according to the plate count method of national standard GB4789.3-2016. The results were as follows: It is evident that the present invention has a significant effect in killing Escherichia coli.

[0044] According to the scraper-type ultraviolet sterilization device for liquid food of the present invention, the liquid food enters the dispersion chamber through the synchronous rotation of the distribution plate and the scraper. Under the rotation of the distribution plate, the liquid food is evenly distributed around the chamber and flows into the gap between the scraper and the quartz sleeve through the V-shaped notch. During the downward flow, the rotating scraper forms an extremely thin liquid film, and the vortex and turbulent liquid film generated during the scraping accelerate the surface renewal rate of the liquid, overcoming the weakness of ultraviolet light penetration. By setting the scraper at an angle, the liquid flow time can be extended, and the liquid is continuously irradiated by ultraviolet lamps distributed outside the quartz sleeve, achieving a good sterilization effect. This invention can be widely applied to the cold sterilization process of liquid foods such as fruit juice, milk, and red wine.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0046] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0047] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A scraper-type ultraviolet sterilization device for liquid food, characterized in that, include: The shell (1) has a cavity; Bearing housing (2) is installed on one side of the housing (1); The motor reducer (3) is mounted on the bearing housing (2), and the output end of the motor reducer (3) is connected to the main shaft (31). A quartz sleeve (4) is installed inside the housing (1) to divide the cavity into a first chamber and a second chamber; Multiple ultraviolet lamps (5) are arranged in an array in the first chamber, and each ultraviolet lamp (5) is fixedly connected to the housing (1); The liquid distribution plate (6) is installed on the main shaft (31) and has a gap between it and the quartz sleeve (4) to divide the second chamber into a communicating liquid dispersion chamber (7) and a third chamber, wherein the liquid distribution plate (6) has a plurality of notches (610) on its periphery. Multiple scrapers (8) are installed on the main shaft (31) located in the third chamber and have a gap between them and the quartz sleeve (4). Under the rotation and scraping of the scrapers (8), the liquid food forms a film in the gap and forms a turbulent liquid film and vortex in the notch (610). The feed pipe (9) is installed on the housing (1) and communicates with the liquid dispersion chamber (7); The discharge pipe (10) is installed on the housing (1) and communicates with the third chamber.

2. The scraper-type ultraviolet sterilization device for liquid food according to claim 1, characterized in that, The liquid distribution plate (6) includes: The base plate (60) has a through hole in the middle. The cross-section of the base plate (60) is sloping and its height gradually decreases as it deviates from the direction of the through hole. An edge ring (61) is installed on the periphery of the base plate (60), and the edge ring (61) has multiple notches (610) at equal intervals.

3. The scraper-type ultraviolet sterilization device for liquid food according to claim 1, characterized in that, The scrapers (8) are mounted in a circular array on the main shaft (31), and each scraper (8) corresponds to a notch (610).

4. The scraper-type ultraviolet sterilization device for liquid food according to claim 3, characterized in that, The outer diameter of the scraper (8) is equal to the outer diameter of the liquid distribution plate (6).

5. The scraper-type ultraviolet sterilization device for liquid food according to claim 3, characterized in that, The notch (610) is V-shaped, and the bottom end of the notch (610) is aligned with the position of the scraper (8).

6. The scraper-type ultraviolet sterilization device for liquid food according to claim 3, characterized in that, The scrapers (8) are equally spaced and inclined on the main shaft (31), and the angle between the inclination direction and the rotation direction is an obtuse angle.

7. The scraper-type ultraviolet sterilization device for liquid food according to claim 1, characterized in that, The number of the ultraviolet lamps (5), the notches (610), and the scrapers (8) are equal.

8. The scraper-type ultraviolet sterilization device for liquid food according to claim 4, characterized in that, Both the liquid distribution plate (6) and the scraper (8) are made of PTFE.

9. The scraper-type ultraviolet sterilization device for liquid food according to claim 1, characterized in that, Both the housing (1) and the feed pipe (9) are made of 304 stainless steel.

10. The scraper-type ultraviolet sterilization device for liquid food according to claim 1, characterized in that, The ultraviolet lamp (5) is a single-ended four-pin ultraviolet lamp with an ultraviolet wavelength of 253.7nm.

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