A device and method for sterilizing light-transmitting food materials based on pulsed intense light

Abstract

The present invention discloses a translucent food material sterilization device and method based on pulsed strong light. The device adopts a Pascal's triangle lamp layout and uses the Lagrange extreme value method to input the transmittance of different materials and solve the maximum lamp spacing under the premise of the specified benevolent effect of different materials. On the one hand, it can ensure that the material microelement at each physical position fully receives the pulse light source to achieve the preset sterilization effect; on the other hand, it can maximize the lamp spacing, reduce the number of lamps on display, and reduce equipment manufacturing and production costs. The algorithm for solving the lamp spacing based on the Lagrange extreme value method is applicable to all non-Newtonian fluid materials with a transmittance of ≥30% at 210-390nm. In addition, a pipe with a certain taper is used in the device to connect to the cavity, so that the radius value of the pipe tends to be continuous, and each array lamp in multiple independent cavities is efficiently sterilized, and finally flows out through the pipe of the last cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, and in particular to a device and method for sterilizing light-transmitting food materials based on pulsed intense light. Background Art

[0002] Foods rich in heat-sensitive active proteins and vitamins, such as milk, egg white, and fruit and vegetable beverages, are frequently consumed as fluids in daily life and possess high nutritional value. However, these foods are susceptible to contamination by various microorganisms during processing, and traditional heat sterilization techniques can easily degrade the functions of key nutrients. Pulsed light is generally used for cold sterilization of liquids, as these have a certain light transmittance.

[0003] The prior art discloses a device and method for sterilizing translucent food materials based on pulsed strong light. A lamp rack is also installed on the bracket. The lamp rack passes through the upper and lower belts mounted on the rollers. A plurality of heating lamps are provided on the lower surface of the lamp rack. The height of the lamp rack in the vertical direction can be freely adjusted.

[0004] The cited prior art sterilization device sterilizes the material through an internal baking lamp. The lamp holder can move up and down. The actual light transmittance of the liquid is less than 100%. Parallel light will be absorbed in the liquid, resulting in a decrease in luminous flux. The farther the liquid is from the light source, the smaller the light intensity value. Therefore, there is a problem that the liquid far away from the light source cannot be effectively sterilized. Summary of the Invention

[0005] The purpose of the present invention is to provide a translucent food material sterilization device and method based on pulsed strong light, so as to solve the problem raised in the above background technology that parallel light in the current market will be absorbed in the liquid, resulting in a decrease in luminous flux. The farther the liquid is from the light source, the smaller the light intensity value. Therefore, the liquid far away from the light source cannot be effectively sterilized.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a translucent food material sterilization device based on pulsed intense light, comprising a heating plate welded to the inside of a material cylinder, and a rotor pump installed on the right side of the inside of the material cylinder;

[0007] It also includes: a series cavity, which is installed at the right end of the rotor pump, and a pulse lamp tube is arranged throughout the interior of the series cavity, and a nozzle is installed at the front end of the pulse lamp tube. The series cavity ensures that all liquids flowing through the cavity can be effectively sterilized, and the pulse lamp tube can be arranged in a Yang Hui triangle lamp tube layout.

[0008] The intense pulsed light lamp array inside each series cavity adopts a Pascal's triangle lamp layout and uses the Lagrange extreme value method (input transmittance) to solve the maximum lamp tube spacing suitable for different materials under the premise of sufficient sterilization effect. On the one hand, it can ensure that the material microelement at each physical position is fully exposed to the pulsed light source, and the light intensity of the material liquid at each position can be maintained high for a certain period of time to achieve the preset sterilization effect; on the other hand, it can maximize the lamp tube spacing, reduce the number of lamps on display, and reduce equipment manufacturing and production costs.

[0009] Preferably, screws are installed on both ends of the series cavity, and conical connecting pipes are installed on both ends of the series cavity, and the conical connecting pipes on adjacent series cavities are installed with pipes, and the pipes are arranged in an "S" shape.

[0010] A method for sterilizing translucent food materials based on pulsed intense light, the sterilization method comprising the following steps:

[0011] S1: Add the liquid into the tank and balance the temperature of the liquid;

[0012] S2: After the temperature is balanced, the liquid enters the rotor pump, and the rotor pump controls the delivery flow rate;

[0013] S3: The liquid after passing through the rotor pump enters the interior of the series cavity.

[0014] Preferably, the rotor pump is used to deliver materials to the pulse light heating cavity, can accurately control the delivery flow rate, and has strong self-priming ability, and is suitable for delivering high-viscosity materials;

[0015] The material tank has a heating function, which can be used to preheat the material, reduce the basic average, and improve the subsequent sterilization effect;

[0016] The series cavity uses a three-layer mixing cavity topology structure to divide the cavity into three independent cavities, and connects these cavities through tapered connecting pipes, so that the liquid is fully mixed when flowing through the slender pipe, and then passes through each array pulse lamp tube in multiple independent series cavities for efficient sterilization, and flows out through the pipe of the last series cavity.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The light intensity of the liquid at each position can be kept high for a certain period of time. A Pascal's triangle lamp layout can be used to increase the contact area between the pulse light source and the liquid, ensuring that all liquids flowing through the cavity can be effectively sterilized.

[0019] 2. The tapered pipe is connected to the cavity, making the radius of the pipe tend to be continuous, and the laminar flow effect is better, turbulence is reduced, thereby avoiding the retention of liquid. A three-layer mixing cavity topology is used to divide the cavity into three independent cavities, and these cavities are connected by tapered connecting pipes, so that the liquid is fully mixed when flowing through the slender pipe, and then passes through each array lamp in multiple independent cavities for efficient sterilization, and finally flows out through the pipe of the last cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the series cavity of the present invention;

[0021] Figure 2 This is a schematic diagram of the main sectional structure of the three-dimensional series cavity of the present invention;

[0022] Figure 3 Schematic diagram of the sterilization process of the present invention;

[0023] Figure 4 This is a schematic diagram of the lamp distribution of the present invention.

[0024] In the figure: 1. Series cavity; 2. Conical connecting pipe; 3. Screw; 4. Pipe; 5. Nozzle; 6. Pulse lamp. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1-4 The present invention provides a technical solution: This solution can effectively sterilize the liquid feed, specifically see Figure 1 and Figure 4 As shown, a translucent food material sterilization device based on pulsed strong light includes a heating plate welded to the inside of a material cylinder, and a rotor pump is installed on the right side of the inside of the material cylinder; it also includes: a series cavity 1 installed at the right end of the rotor pump, and a pulse lamp tube 6 is provided throughout the interior of the series cavity 1, and a nozzle 5 is installed at the front end of the pulse lamp tube 6. The series cavity 1 ensures that all liquids flowing through the cavity can be effectively sterilized, and the pulse lamp tube 6 can be arranged in a Pascal's triangle lamp tube layout; screws 3 are installed on the left and right ends of the series cavity 1, and tapered connecting pipes 2 are installed on the left and right ends of the series cavity 1, and the tapered connecting pipes 2 on adjacent series cavities 1 are installed with pipes 4, and the pipes 4 are arranged in an "S" shape.

[0027] A device and method for sterilizing translucent food materials based on pulsed intense light, the sterilization method comprising the following steps:

[0028] S1: Add the liquid into the tank to balance the temperature of the liquid;

[0029] S2: The liquid after temperature balancing enters the rotor pump, and the rotor pump controls the delivery flow rate;

[0030] S3: The liquid after passing through the rotor pump enters the interior of the series cavity 1.

[0031] Rotor pump, used to deliver materials to the pulse light heating cavity, can accurately control the delivery flow rate and has strong self-priming ability, suitable for delivering high-viscosity materials;

[0032] The material tank has a heating function, which can be used to preheat the material, reduce the basic average, and improve the subsequent sterilization effect;

[0033] The series cavity 1 uses a three-layer mixing cavity topology, dividing the cavity into three independent cavities. These cavities are connected by a tapered connecting pipe 2, so that the liquid is fully mixed when flowing through the slender pipe 4, and then passes through each array of pulse lamps 6 in multiple independent series cavities 1 for efficient sterilization, and flows out through the pipe 4 of the last series cavity 1;

[0034] When using a Pascal's triangle lamp layout, if the distance between the lamps is too small, the arrangement of the lamps will become dense, so that the gaps between the lamps will be reduced, which will reduce the flow rate of the high-viscosity liquid, thereby reducing production efficiency and increasing the number of lamps, thereby increasing costs. If the distance between the lamps is too large, it will easily cause a large amount of liquid to be away from the light source and cannot be effectively sterilized. Therefore, setting the distance between the lamps reasonably is the key to the design. The sum of the inverse of the square of the distance between a liquid element and the axis of each lamp tube is inversely proportional to the square of the distance between the light source and the inverse of the light intensity. The liquid element in the entire cavity can be solved by performing a triple volume integral solution, with the volume integral equal to a certain threshold as a constraint condition, and then using the Lagrange extreme value method to input the transmittance of different materials to solve the maximum lamp tube spacing applicable to different materials under the premise of sufficient sterilization effect, so as to ensure that all liquids can be effectively sterilized in the largest cavity. The solution process is as follows:

[0035] Since the layout of the lamp tubes in the cavity is fixed, the center distance between the lamp tubes is represented by w. Therefore, the distance from the center of any area element with coordinates (x, y) to the center of the lamp tube can be represented by the function Si (x, y, w).

[0036] Since the lamp has a certain diameter, ignoring refraction and reflection, the area element is directly illuminated by multiple lamps at the same time, but some of the direct light may be blocked by other lamps and cannot form effective illumination. Therefore, the coefficient Ki is defined to represent whether the area element can be directly illuminated by lamp i. If it can be directly illuminated, Ki=1, otherwise Ki=0;

[0037] Since all cross sections in the cavity are congruent, the triple integral of the entire cavity space is simplified to a double integral within the cavity cross section. The cavity cross section D is used as the double integral interval, and the following function is used to characterize the sterilization effect. The coefficient K in the function is the transmittance coefficient of the liquid, and T is the characterization quantity of the sterilization effect. The sterilization effect is inversely proportional to the square of the distance from the light source.

[0038]

[0039] when Take the weakest allowable bactericidal effect T min When , solve the minimum value of w and establish the Lagrangian function:

[0040]

[0041] According to the Lagrange extreme value method, the minimum tube center distance w can be obtained according to the following formula:

[0042]

[0043] In addition, in order to improve the sterilization uniformity of the liquid, a three-layer mixing chamber topology is used to divide the series chamber 1 into three independent series chambers 1, and these chambers are connected by a tapered connecting pipe 2. This allows the liquid to be fully mixed when flowing through the slender pipe 4, and then pass through each array pulse lamp 6 in the multiple independent series chambers 1 for efficient sterilization, and finally flow out through the pipe 4 of the last series chamber 1;

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A translucent food material sterilization device based on pulsed intense light, comprising a heating plate installed inside a cavity cylinder, and a rotor pump installed on the right side of the cylinder; It is characterized by: Also includes: The series cavity (1) is installed at the right end of the rotor pump, and a pulse lamp (6) is provided inside the series cavity (1). A plurality of pulse lamps (6) form an intense pulse light lamp array, and a nozzle (5) is installed at the front end of the pulse lamp (6). The series cavity (1) ensures that all liquids flowing through the cavity can be effectively sterilized. The pulse lamp (6) adopts a Pascal's triangle lamp layout. Screws (3) are installed at both left and right ends of the series cavity (1), and conical connecting pipes (2) are installed at both left and right ends of the series cavity (1), and the conical connecting pipes (2) on adjacent series cavities (1) are installed with pipes (4), and the pipes (4) are arranged in an "S"-shaped structure; The rotor pump is used to transport materials to the pulse light heating cavity and is suitable for transporting high-viscosity, light-transmitting non-Newtonian fluid materials; Temporary storage tank with heating function, used for preheating materials to balance temperature and improve the subsequent sterilization effect; The series cavity (1) uses a three-layer mixing cavity topology structure to divide the cavity into three independent cavities, and connects these cavities through a tapered connecting pipe (2), so that the liquid is fully mixed when flowing through the slender pipe (4), and then passes through each array pulse lamp (6) in the multiple independent series cavities (1) for efficient sterilization, and flows out through the pipe of the last series cavity (1).

2. A method for implementing the device for sterilizing translucent food materials based on pulsed intense light according to claim 1, characterized in that: The sterilization method comprises the following steps: S1: Add the material into the temporary storage tank to balance the material temperature; S2: After the temperature is balanced, the fluid material enters the rotor pump, and the rotor pump controls the delivery flow rate; S3: The material after passing through the rotor pump enters the interior of the series cavity (1).

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