Packaging material sterilization device and sterilization method

Abstract

The present invention discloses a packaging material sterilization device and a sterilization method, including a steam component, a sterilization component, an evaporation component and a circulation component. The steam component is connected to the sterilization component, the steam component generates sterilant vapor, and the surface of the packaging material therein is sterilized by spraying it at high speed through the sterilization component, and the circulation component in the evaporation component extracts the waste gas in the evaporation component, and after neutralization, filtration and purification, it is input into the evaporation component again and sprayed through a hot air nozzle to dry the packaging material in the evaporation component. High-pressure sterilant vapor is directly sprayed onto the surface of the packaging material for sterilization, the sterilization is fast and thorough, the sterilization efficiency is high, the sterilization agent consumed by the surface of the packaging material is small, the sterilization agent consumption is small, the use cost is low, and the quality of the packaged product is ensured at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of coiled material sterilization, and in particular to a sterilization device and a sterilization method for roll-shaped packaging materials. Background Art

[0002] In the food industry, the paper roll forming packaging system is currently the most widely used packaging system for aseptic packaging of commercially sterile liquid foods such as juice, beverages, milk and other foods. At present, the roll packaging material used in the liquid food filling machine is a multi-layer composite packaging material composed of paper, multi-layer plastic and aluminum foil. The method for sterilizing the packaging material in the liquid food filling machine using the roll packaging material is to first soak the packaging material with high-temperature hydrogen peroxide liquid, then blow off the hydrogen peroxide liquid residue on the surface of the packaging material with high-temperature sterile air, and finally enter a closed cavity at a certain temperature to evaporate the hydrogen peroxide residue on the surface of the packaging material to complete the sterilization of the roll packaging material.

[0003] The existing method for sterilizing roll-shaped packaging materials of liquid food high-speed filling machines has the following shortcomings: First, after the packaging material is soaked in hydrogen peroxide liquid, a large amount of hydrogen peroxide liquid is adsorbed and taken away on the surface, the consumption of sterilizing agent hydrogen peroxide is too large, and the use cost is high; Second, after the packaging material is soaked in hydrogen peroxide, a large amount of hydrogen peroxide liquid will penetrate into the side edges of the packaging material, which is difficult to remove during the drying process, affecting the quality of the packaged product and having a poor use effect; Third, when the packaging material passes through the hydrogen peroxide liquid, the movement state of the packaging material will change due to the resistance and agitation of the hydrogen peroxide liquid, the packaging material is unstable in operation, easy to deviate, and has poor use stability; Fourth, there is a large amount of hydrogen peroxide residue on the surface of the packaging material, the energy consumption required for heating, heat preservation and drying evaporation of hydrogen peroxide is high, and the energy-saving and environmental protection benefits are poor; Fifth, thinner packaging materials are easy to soften or break after soaking, and are not suitable for products with high requirements on packaging material quality, and have a narrow scope of application. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a sterilization device and a sterilization method which are simple in structure and operation, reduce use cost and energy consumption, and improve the sterilization efficiency of packaging materials.

[0005] In order to solve the above technical problems, the present invention provides a packaging material sterilization device, comprising:

[0006] A steam component, the steam component is connected to the sterilant tank, the steam component is provided with a sterilant pump and a vaporizer, and the sterilant pump and the vaporizer are connected to the sterilant tank in sequence;

[0007] A sterilization component, wherein the sterilization component is provided with a sterilization cavity, a plurality of groups of sterilant nozzles are arranged in the sterilization cavity, the sterilant nozzles are connected to the gasifier, a liquid collecting cavity is connected below the sterilization cavity, and a steering roller is arranged in the liquid collecting cavity;

[0008] An evaporation component, wherein the evaporation component is provided with a hot air cavity, the hot air cavity is arranged above the liquid collecting cavity, and a hot air nozzle is arranged in the hot air cavity;

[0009] A circulation component, the circulation component comprises an upper cavity, the upper cavity is divided into a feed cavity and a discharge cavity by a partition, the partition is provided with a vent, the inlet of a filter, an air pump and an air processor are connected to the feed cavity and the hot air cavity in sequence, and the outlet of the air processor is connected to the hot air nozzle and the discharge cavity;

[0010] The upper cavity, the sterilization cavity, the liquid collecting cavity and the hot air cavity outlet are connected together through a connecting channel to form a relatively sealed space, and the packaging materials pass through the above cavities in sequence.

[0011] As a preferred embodiment, the sterilization chamber and the hot air chamber are arranged side by side above the liquid collecting chamber, the feed chamber outlet is connected to the upper inlet of the sterilization chamber, the lower outlet of the sterilization chamber is connected to the inlet of the liquid collecting chamber, the liquid collecting chamber outlet is connected to the hot air chamber inlet, and the hot air chamber outlet is connected to the discharge chamber.

[0012] As a preferred embodiment, the sterilizing agent nozzle and the hot air nozzle are respectively arranged facing the sterilizing cavity and two side surfaces of the packaging material in the hot air cavity.

[0013] As a preferred embodiment, the hot air cavity is arranged in the discharge cavity, the feed cavity outlet is connected to the upper inlet of the sterilization cavity, the lower outlet of the sterilization cavity is connected to the liquid collection cavity inlet, the liquid collection cavity outlet is connected to the lower inlet of the sterilization cavity, and the upper outlet of the sterilization cavity is connected to the hot air cavity.

[0014] As a preferred embodiment, the sterilizing agent nozzles are respectively arranged in the middle and outside of the packaging materials on both sides of the turning roller, and the sterilizing agent nozzles are respectively directed to the two sides of the two pieces of packaging materials.

[0015] As a preferred embodiment, two groups of sterilizer nozzles are provided, and the two groups of sterilizer nozzles are arranged on both sides of the packaging material between the feeding cavity and the liquid collecting cavity.

[0016] As a preferred embodiment, a number of tiny pores are evenly arranged on the sterilizer nozzle and the hot air nozzle, the sterilizer nozzle and the hot air nozzle are tilted downward, and the angle between the sterilizer nozzle or the hot air nozzle and the vertical direction is 10-80°.

[0017] As a preferred embodiment, the sterilization cavity and the liquid collection cavity are both connected to a purification tank below, and purification liquid is provided in the purification tank.

[0018] As a preferred embodiment, sealing lips are provided on the communication channels connecting the cavities.

[0019] The present invention also provides a method for sterilizing packaging materials, comprising:

[0020] S01, passing the packaging materials around the feeding cavity, the sterilization cavity, the liquid collecting cavity, the hot air cavity and the discharging cavity respectively;

[0021] S02, the vaporizer vaporizes the sterilant and sprays the sterilant vapor toward the packaging material in the sterilization chamber through the sterilant nozzle;

[0022] S03. The air pump extracts the waste gas in the hot air cavity and the feed cavity, and after being filtered by the filter and sterilized by the air processor, it is sprayed to the packaging material in the hot air cavity and fills the discharge cavity through the hot air nozzle to form an air circulation.

[0023] The packaging material and packaging method of the present invention have the following beneficial effects compared with the prior art:

[0024] 1. Use high-pressure sterilizer steam to spray directly onto the surface of the packaging material for sterilization. The sterilization is fast and thorough, with high sterilization efficiency, safety and reliability;

[0025] 2. Use high-temperature sterilizer steam to sterilize the surface of the packaging material, so less sterilizer is consumed on the surface, and the cost of use is low;

[0026] 3. After the packaging material is sterilized, there is less sterilant residue on the surface, which ensures the quality of the packaged product, is safer to use, and has better effect;

[0027] 4. The sterilization process will not affect or damage the properties of the packaging materials, will not affect the running track of the packaging materials, has low requirements on the quality and thickness of the packaging materials, and is applicable to a wider range of packaging materials;

[0028] 5. The energy consumption required for heating, spraying and drying of the sterilizer is low, the cost of use is low, and it is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0031] Figure 3It is a schematic diagram of the overall structure of embodiment 3 of the present invention.

[0032] Explanation of numbers in the figure: 1. Sterilizer tank, 2. Sterilizer pump, 3. Vaporizer, 4. Sterilizer nozzle, 5. Guide roller, 6. Packaging material, 7. Upper cavity, 8. Air handler, 9. Air pump, 10. Filter, 11. Purification tank, 12. Turning roller, 13. Liquid collecting cavity, 14. Sterilization cavity, 15. Hot air cavity, 16. Hot air nozzle, 17. Feed cavity, 18. Discharge cavity, 19. Sealing lip, 20. Inlet, 21. Outlet, 22. Return air port, 23. Vent, 24. Air inlet, 25. Steam outlet, 26. Reflux port, 27. Air outlet, 28. Sterilizer pipeline, 29. Hot air pipeline, 30. Air inlet pipe, 31. Return air pipe, 32. Air outlet pipe, 33. Air outlet pipe, 34. Reflux pipe, 35. Discharge port, A. Movement direction. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0034] Reference Figure 1 As shown, it is a schematic diagram of an embodiment of a packaging material 6 sterilization device of the present invention, and the sterilization device of the present invention comprises a steam component, a sterilization component, an evaporation component and a circulation component. The steam component is connected to the sterilization component, and the steam component generates sterilant vapor, and sprays it at high speed through the sterilization component to sterilize the surface of the packaging material 6 therein, and the circulation component in the evaporation component extracts the waste gas in the evaporation component, and after neutralization, filtration and purification, it is input into the evaporation component again and sprayed through the hot air nozzle 16 to dry the packaging material 6 in the evaporation component.

[0035] Specifically, the steam component is connected to the sterilant tank 1, and the steam component is provided with a sterilant pump 2 and a vaporizer 3, and the sterilant pump 2 and the vaporizer 3 are connected to the sterilant tank 1 in sequence through the sterilant pipeline 28. The sterilant tank 1 is used to store, heat and supply the sterilant. The sterilant pump 2 draws the sterilant in the sterilant tank 1 through the sterilant pipeline 28 and enters the vaporizer 3, and at the same time increases the sterilant pressure in the sterilant pipeline 28 to the required pressure. The vaporizer 3 is an existing device, which heats, pressurizes and vaporizes the sterilant in a known manner to form the required high-temperature and high-pressure sterilant vapor. The temperature, pressure and vaporization degree of the sterilant vapor produced by the vaporizer 3 can be determined by experiments, and the optimal parameters that can achieve the best sterilization effect can be obtained.

[0036] The sterilization assembly is provided with a sterilization cavity 14, and several groups of sterilant nozzles 4 are arranged in the sterilization cavity 14, and the sterilant nozzles 4 are connected to the vaporizer 3. The packaging material 6 passes through the sterilization cavity 14, and the sterilant nozzles 4 sterilize the surface of the packaging material 6. In order to strengthen the impact force of the sterilant vapor on the surface of the packaging material 6, so that the sterilant vapor flow sprayed by the sterilant nozzle 4 can peel off and wash away the dirt on the surface of the packaging bag, the sterilant nozzle 4 is evenly arranged with a number of tiny pores, so that after being heated and pressurized by the vaporizer 3, the sterilization vapor can be sprayed onto the surface of the packaging material 6 at a high speed and evenly. Further, in this embodiment, the sterilant nozzle 4 is tilted downward, and the angle between the sterilant nozzle 4 and the vertical direction is 10-80°. Thus, the airflow will hit the packaging material 6 at an angle with a more downward direction, sweeping the sterilant downward. This angle will cause the airflow to sweep the sterilant in the direction below the packaging. The sweeping effect makes the sterilant more evenly distributed on the packaging material 6, and the excess sterilant can gather under the sterilization chamber 14. The effective spray width of the sterilant nozzle 4 is not less than the width of the packaging material 6 to ensure thorough sterilization of the packaging material 6. In order to enable the residual sterilant liquid on the packaging material 6 to initially drip a part under the action of gravity to reduce the workload of drying, the sterilization chamber 14 is connected to a liquid collection chamber 13 below, and the steering roller 12 is arranged in the liquid collection chamber. The packaging material 6 bypasses the steering roller 12, so that the steering roller 12 is the lowest point of the packaging material 6, and the residual sterilant solution on the packaging material 6 gathers there and finally drips into the liquid collection chamber.

[0037] After the sterilizing agent steam is sprayed, there is still sterilizing agent residue on the packaging material 6. In order to dry the packaging material 6, the packaging material 6 continues to pass through the evaporation component, and the evaporation component is provided with a hot air cavity 15. The hot air cavity 15 is arranged above the liquid collecting cavity 13, that is, the sterilizing agent residue on the packaging material 6 is first naturally dripped and then evaporated by hot air for drying. The hot air is ejected by the hot air nozzle 16 arranged in the hot air cavity 15. The hot air nozzle 16 has evenly arranged tiny pores, so that the hot air can be evenly sprayed onto the surface of the packaging material 6 at high speed. The hot air nozzle 16 is tilted downward, and the angle with the vertical direction is 10-80°, so that the spraying area is larger, and the sterilizing agent residue on the surface of the packaging material 6 is evaporated more quickly.

[0038] Since the sterilizing agent residue on the surface of the packaging material 6 is evaporated into the hot air cavity 15, the hot air in the hot air cavity 15 contains sterilizing agent residue and other impurities, and direct discharge is easy to cause pollution. If the hot air cavity 15 is directly connected to the outside, it is easy to cause pollution to the hot air cavity 15. Therefore, the present invention is provided with an internal circulation component. The circulation component includes an upper cavity 7, and the upper cavity 7 is divided into a feed cavity 17 and a discharge cavity 18 by a partition. In this embodiment, guide rollers 5 are respectively provided in the feed cavity 17 and the discharge cavity 18. The packaging material 6 enters the feed cavity 17 from the inlet 20, bypasses the guide rollers 5, and enters the sterilization cavity 14, the liquid collection cavity 13, the hot air cavity 15 and the discharge cavity 18 in turn, and is guided by the guide rollers 5 in the discharge cavity 18 and then flows out from the outlet 21. In order to improve the sterilization and drying effect of the packaging material 6, an air inlet 24 is provided on the discharge cavity, and sterile hot air is further introduced into the discharge cavity 18 through the air inlet pipe 30. After the packaging material 6 is dried by the hot air component, it is dried again by hot air to ensure the drying effect. Since the temperature of the hot air in the discharge cavity 18 is relatively high, in order to improve the efficiency of the use of hot air, a vent 23 is provided on the partition, so that the gas in the feed cavity 17 and the discharge cavity 18 can circulate, and the hot air in the discharge cavity 18 enters the feed cavity 17 through the vent 23, preheating the packaging material 6 and improving the sterilization efficiency. At this time, the waste gas is generated in the hot air cavity 15 and the feed cavity 17, so the inlets of the filter 10, the air pump 9 and the air processor 8 are connected to the feed cavity 17 and the hot air cavity 15 in sequence, and the air pump 9 sucks the gas in the feed cavity 17 and the hot air cavity 15, and the gas is filtered by the filter 10, and then processed by the air processor 8 to form sterile high-temperature gas. The outlet 21 of the air processor 8 is connected to the hot air nozzle 16 and the discharge cavity 18. The sterile high-temperature gas dries the packaging material 6 in the hot air cavity 15 through the hot air nozzle 16. At the same time, the sterile high-temperature gas fills the discharge cavity 18 to further ensure the drying effect of the packaging material 6.

[0039] In order to ensure that the packaging material 6 is always in a sterile environment during the sterilization and drying process, the upper cavity 7, the sterilization cavity 14, the liquid collection cavity 13 and the outlet 21 of the hot air cavity 15 are connected together through a connecting channel to form a relatively sealed space, and the packaging material 6 passes through the above cavities in sequence. In order to ensure that the packaging material 6 can smoothly pass through each cavity while isolating the flow between each cavity and between each cavity and the outside air, a sealing lip 19 is provided on the connecting channel connecting each cavity. The sealing lip 19 is made of a corrosion-resistant and high-temperature resistant soft sealing material, which isolates the airflow without affecting the transmission of the packaging material 6.

[0040] Reference Figure 1The figure is a schematic diagram of the first embodiment of the present invention. In this embodiment, the sterilization chamber 14 and the hot air chamber 15 are arranged side by side above the liquid collecting chamber 13. The outlet 21 of the feeding chamber 17 is connected to the upper inlet 20 of the sterilization chamber 14, the lower outlet 21 of the sterilization chamber 14 is connected to the inlet of the liquid collecting chamber 13, the outlet 21 of the liquid collecting chamber 13 is connected to the inlet of the hot air chamber 15, and the outlet 21 of the hot air chamber 15 is connected to the discharge chamber 18. In this embodiment, the packaging material 6 enters from the feeding chamber 17, and then extends downward into the sterilization chamber 14, and then enters the liquid collecting chamber 13. Under the guidance of the turning roller 12, the packaging material 6 extends upward into the hot air chamber 15, and finally enters the discharge chamber 18 and flows out. That is, the packaging material 6 on both sides of the turning roller 12 extends into the sterilization cavity 14 and the hot air cavity 15 respectively, and the packaging material 6 is first sterilized by the sterilant steam and then dried by the hot air. In order to ensure that both sides of the packaging material 6 can be sterilized and dried, in this embodiment, the sterilant nozzle 4 and the hot air nozzle 16 are respectively arranged facing the two sides of the packaging material 6 in the sterilization cavity 14 and the hot air cavity 15, and at least one group of sterilant spray and hot air nozzle 16 is arranged on each side of the packaging material 6. When the sterilant nozzle 4 sprays the sterilant steam onto the surface of the packaging material 6, the excess steam is dissipated in the sterilization cavity 14, so that the interior of the sterilization cavity 14 is filled with the sterilant steam, ensuring that the packaging material 6 is always in a sterilized state in the sterilization cavity 14. Since the sterilizing agent vapor will be mixed with impurities after sterilization, in order to collect the sterilized vapor, a vapor outlet 25 is provided below the sterilizing chamber 14, which is connected to the purification tank 11 through the air outlet pipe 33, so that the sterilized vapor in the sterilizing chamber 14 can be introduced into the purification tank 11. The sterilized packaging material 6 continues to enter the liquid collecting chamber 13, and the packaging material 6 brings part of the sterilizing agent residue into the liquid collecting chamber 13. At the same time, due to the low temperature of the liquid collecting chamber 13, the sterilizing agent on the surface of the packaging material 6 condenses into liquid, and drips into the liquid collecting chamber 13 due to gravity. In order to avoid excessive liquid residue in the liquid collecting chamber 13 that immerses the packaging material 6 and affects the use effect of the packaging material 6, a reflux port 26 is provided below the liquid collecting chamber 13, which is connected to the purification tank 11 through the reflux pipe 34, and the sterilizing agent vapor and condensed sterilizing agent residue in the liquid collecting chamber 13 both flow into the purification tank 11. The purification tank 11 is provided with a purification liquid, which dilutes and neutralizes the sterilant residues flowing into the sterilization cavity 14 and the liquid collection cavity 13 to meet the pollution-free discharge standard and is discharged from the discharge port 35. The packaging material 6 extends from the liquid collection cavity 13 and enters the hot air cavity 15. When the hot air nozzle 16 sprays hot air on the surface of the packaging material 6, the hot air escapes into the hot air cavity 15, so that the hot air cavity 15 is filled with hot air, ensuring that the packaging material 6 is always in a high-temperature drying state in the hot air cavity 15. The dried packaging material 6 continues to enter the discharge cavity 18. In order to improve the drying effect of the packaging material 6, hot air is continued to be introduced into the discharge cavity 18 to remove the sterilant residues on the surface of the packaging material 6.Since the air temperature in the discharge cavity 18 is relatively high, in order to fully utilize the high-temperature hot air, the high-temperature hot air in the discharge cavity 18 enters the feed cavity 17 through the vent 23, preheats the packaging material 6 inside the feed cavity 17, and improves the sterilization effect of the packaging material 6. In order to ensure that the gas in the discharge cavity 18 can enter the feed cavity 17 through the vent 23, and the gas in the feed cavity 17 will not enter the discharge cavity 18, so as to prevent the gas in the feed cavity 17 from contaminating the sterilized packaging material 6, the size of the vent 23 is optimized and determined according to the pressure difference between the feed cavity 17 and the discharge cavity 18, so as to ensure that the air pressure of the sterile hot air inside the discharge cavity 18 is higher than the air pressure inside the feed cavity 17. In the present embodiment, the hot air cavity 15 and the discharge cavity 18 both have sterile hot air to dry the packaging material 6, so there is residual hot air in the hot air cavity 15 and the discharge cavity 18. Since the residual hot air in the discharge cavity 18 enters the feed cavity 17 to preheat the packaging material 6, the filter 10 is connected to the return air port 22 on the feed cavity 17 through the return air duct 31, and is connected to the air outlet 27 on the hot air cavity 15 through the outlet duct 32. The air pump 9 sucks the gas in the feed cavity 17 and the hot air cavity 15 processed by the filter 10 through the hot air duct 29, and transports the processed clean gas to the inside of the air processing unit 8 through the hot air duct 29, and generates high-pressure sterile hot air after being processed by the air processing unit 8. A portion of the high-pressure sterile hot air is transported through the hot air duct 29 and ejected from the hot air nozzle 16 in the hot air cavity 15, and another portion of the high-pressure sterile hot air is transported to the inside of the discharge cavity 18 through the air inlet pipe 30 connected to the air inlet 24, thereby realizing the circulation of sterile high-temperature gas.

[0041] When the present embodiment is working, the sterilant in the sterilant tank 1 is extracted by the sterilant pump 2, pressurized and transported to the inside of the vaporizer 3 through the sterilant pipeline 28, and processed by the vaporizer 3 to generate high-temperature and high-pressure sterilant vapor, which is transported through the sterilant pipeline 28 and sprayed uniformly and at high speed in a certain direction by the sterilant nozzle 4 onto the surface of the packaging material 6, thereby sterilizing the inner and outer surfaces of the packaging material 6. The sterilant vapor remaining after consumption is discharged from the steam outlet 25 through the air outlet pipe 33 into the purification tank 11, and the sterilant vapor and condensate remaining in the liquid collection cavity 13 are discharged from the reflux port 26 through the reflux pipe 34 into the purification tank 11, and are discharged from the discharge port 35 after being processed in the purification tank 11 and meeting the discharge standard, thereby completing the working cycle of the sterilant.

[0042] The packaging material 6 enters the feeding cavity 17 from the inlet 20 along the moving direction A for preheating, and enters the sterilization cavity 14 supported and guided by the guide roller 5, and the sterilizing agent nozzle 4 sprays and sterilizes the inner and outer surfaces of the packaging material 6. The sterilized packaging material 6 enters the liquid collecting cavity 13, and enters the hot air cavity 15 supported and guided by the turning roller 12, and the hot air nozzle 16 sprays sterile hot air to evaporate most of the sterilizing agent residues on the inner and outer surfaces of the packaging material 6. The packaging material 6 continues to move into the discharging cavity 18, and the sterile hot air in the discharging cavity 18 further dries the sterilizing agent residues on the surface of the packaging material 6, thereby removing the sterilizing agent residues on the surface of the packaging material 6. The dried packaging material 6 moves out of the discharging cavity 18 from the outlet 21 along the moving direction A through the support and guidance of the guide roller 5.

[0043] The clean air treated by the filter 10 is compressed by the air pump 9 and transported to the inside of the air treatment device through the hot air duct 29. After being treated by the air treatment device, high-pressure sterile hot air is generated. A part of the high-pressure sterile hot air is transported through the hot air duct 29 and sprayed out by the hot air nozzle 16 in a certain direction at high speed and uniformly, evaporating most of the sterilizing agent residues on the surface of the packaging material 6. Inside the hot air cavity 15, the waste gas containing the sterilizing agent residue re-enters the filter 10 through the air outlet 27 and the air outlet pipe 32. Another part of the high-pressure sterile hot air generated by the air treatment device is transported to the inside of the discharge cavity 18 through the air inlet pipe 30. The sterile hot air inside the discharge cavity 18 further dries the sterilizing agent residues on the surface of the packaging material 6 and removes the sterilizing agent residues on the surface of the packaging material 6. The sterile hot air in the discharge cavity 18 enters the inside of the feed cavity 17 through the vent to preheat the packaging material 6 inside the feed cavity 17. The sterile hot air in the feed cavity 17 then re-enters the filter 10 through the return air port 22 and the return air duct 31, thereby completing the working cycle of the sterile hot air.

[0044] Reference Figure 2The figure is a schematic diagram of the structure of the second embodiment of the present invention. In this embodiment, the hot air cavity 15 is arranged in the discharge cavity 18, that is, the hot air cavity 15 is no longer arranged separately. At this time, the outlet 21 of the feed cavity 17 is connected to the upper inlet 20 of the sterilization cavity 14, the lower outlet 21 of the sterilization cavity 14 is connected to the inlet of the liquid collecting cavity 13, the outlet 21 of the liquid collecting cavity 13 is connected to the lower inlet of the sterilization cavity 14, and the upper outlet 21 of the sterilization cavity 14 is connected to the hot air cavity 15. The packaging material 6 enters the feed cavity 17 from the inlet 20, is guided by the guide roller 5 to enter the interior of the sterilization cavity 14, and then enters the liquid collecting cavity 13, enters the sterilization cavity 14 again after being turned by the turning roller 12, and finally enters the discharge cavity 18, is evaporated and dried in the discharge cavity 18, and then flows out from the outlet 21. In this embodiment, since the packaging material 6 enters the sterilization chamber 14 twice, the height of the sterilization chamber 14 can be lowered without reducing the sterilization effect. In order to ensure the sterilization effect of the packaging material 6 in the sterilization chamber 14, in this embodiment, considering the size of the sterilization chamber and the width of the packaging material, three groups of sterilizing agent nozzles 4 are provided, and the sterilizing agent nozzles 4 are respectively provided in the middle and outside of the packaging material 6 on both sides of the turning roller 12, and the sterilizing agent nozzles 4 are respectively directed to the two sides of the two pieces of packaging material 6. That is, before the packaging material 6 bypasses the turning roller 12, its two sides are sprayed with sterilizer nozzles 4 for sterilization, and after the packaging material 6 bypasses the turning roller 12, its two sides are sprayed with sterilizer nozzles 4 for sterilization again, thereby enhancing the sterilization effect. At the same time, since the hot air cavity 15 is arranged in the discharge cavity 18, the hot air nozzle 16 sprays sterile hot air to evaporate the sterilant residue on the surface of the packaging material 6, and the excess hot air dissipates in the discharge cavity 18, further drying the sterilant residue on the surface of the packaging material 6 to ensure the drying effect, and the dried packaging material 6 flows out of the discharge cavity 18 from the outlet 21. At this time, the hot air in the hot air cavity 15, that is, the discharge cavity 18, all enters the feed cavity 17 through the vent 23, so the filter 10 only needs to be connected to the feed cavity 17 to extract all the residual hot air, and the air handler 8 only needs the hot air nozzle 16 to achieve complete drying of the packaging material 6, which simplifies the structure of the circulation component on the basis of the first embodiment.

[0045] Reference Figure 3 The figure is a schematic diagram of the structure of the third embodiment of the present invention. This embodiment further simplifies the structure of the sterilization component on the basis of the second embodiment. The sterilizing agent nozzle 4 is provided with two groups, and the two groups of the sterilizing agent nozzle 4 are provided on both sides of the packaging material 6 between the feeding cavity 17 and the liquid collecting cavity 13. The packaging material 6 is strongly sterilized from the feeding side. When the packaging material 6 bypasses the turning roller 12 and enters the sterilization cavity 14 again, the sterilizing agent vapor floating in the sterilization cavity 14 also has a certain sterilization effect on the packaging material 6. Thus, the overall sterilization effect on the packaging material 6 is guaranteed.

[0046] The present invention also provides a sterilization method using the above-mentioned packaging material 6 sterilization device, comprising:

[0047] S01. The packaging material 6 is passed around the feed cavity 17, the sterilization cavity 14, the liquid collection cavity 13, the hot air cavity 15 and the discharge cavity 18 respectively; the packaging material 6 is always in a closed space for sterilization and drying to ensure the sterilization effect of the packaging material 6.

[0048] S02, the vaporizer 3 vaporizes the sterilant and sprays it to the packaging material 6 in the sterilization cavity 14 through the sterilant nozzle 4; the surface of the packaging material 6 is sterilized by using high-temperature sterilant vapor, and less sterilant is consumed on the surface, the sterilant consumption is low, the use cost is low, and the sterilant residue on the surface of the packaging material 6 after sterilization is small, which ensures the quality of the packaged product. Furthermore, the sterilant residue after sterilization is collected in the purification tank 11, and the purification tank 11 is discharged after purification to the pollution emission standard. The circulation of the sterilant is realized, which is energy-saving and environmentally friendly.

[0049] S03, the air pump 9 extracts the waste gas in the hot air cavity 15 and the feed cavity 17, and after filtering by the filter 10 and sterilization by the air processor 8, it is sprayed toward the packaging material 6 in the hot air cavity 15 through the hot air nozzle 16 and injected into the discharge cavity 18, forming an air circulation without waste gas discharge, which is safe and environmentally friendly.

[0050] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A packaging material sterilization device, characterized in that: include: A steam component, the steam component is connected to the sterilant tank, the steam component is provided with a sterilant pump and a vaporizer, and the sterilant pump and the vaporizer are connected to the sterilant tank in sequence; A sterilization component, wherein the sterilization component is provided with a sterilization cavity, a plurality of groups of sterilant nozzles are arranged in the sterilization cavity, the sterilant nozzles are connected to the gasifier, a liquid collecting cavity is connected below the sterilization cavity, and a steering roller is arranged in the liquid collecting cavity; An evaporation component, wherein the evaporation component is provided with a hot air cavity, the hot air cavity is arranged above the liquid collecting cavity, and a hot air nozzle is arranged in the hot air cavity; A circulation component, the circulation component comprises an upper cavity, the upper cavity is divided into a feed cavity and a discharge cavity by a partition, the partition is provided with a vent, the inlet of a filter, an air pump and an air processor are connected to the feed cavity and the hot air cavity in sequence, and the outlet of the air processor is connected to the hot air nozzle and the discharge cavity; The upper cavity, sterilization cavity, liquid collection cavity and hot air cavity outlet are connected together through a connecting channel to form a relatively sealed space, and the packaging materials pass through the above cavities in sequence; The sterilization cavity and the hot air cavity are arranged side by side above the liquid collection cavity, the feed cavity outlet is connected to the upper inlet of the sterilization cavity, the lower outlet of the sterilization cavity is connected to the liquid collection cavity inlet, the liquid collection cavity outlet is connected to the hot air cavity inlet, and the hot air cavity outlet is connected to the discharge cavity; The hot air cavity is arranged in the discharge cavity, the feed cavity outlet is connected to the upper inlet of the sterilization cavity, the lower outlet of the sterilization cavity is connected to the liquid collection cavity inlet, the liquid collection cavity outlet is connected to the lower inlet of the sterilization cavity, and the upper outlet of the sterilization cavity is connected to the hot air cavity; The sterilizing agent nozzle and the hot air nozzle are respectively arranged facing the two sides of the sterilizing cavity and the packaging material in the hot air cavity; The sterilizing agent nozzles are respectively arranged in the middle and outside of the packaging materials on both sides of the turning roller, and the sterilizing agent nozzles are respectively directed to the two sides of the two pieces of packaging materials.

2. The packaging material sterilization device according to claim 1, characterized in that: The sterilant nozzles are provided in two groups, and the two groups of sterilant nozzles are arranged on both sides of the packaging material between the feeding cavity and the liquid collecting cavity.

3. The packaging material sterilization device according to claim 1, characterized in that: A number of tiny pores are evenly arranged on the sterilizer nozzle and the hot air nozzle. The sterilizer nozzle and the hot air nozzle are tilted downward, and the angle between the sterilizer nozzle or the hot air nozzle and the vertical direction is 10-80 degrees.

4. The packaging material sterilization device according to claim 1, characterized in that: The sterilization cavity and the liquid collection cavity are both connected to a purification tank below, and purification liquid is arranged in the purification tank.

5. The packaging material sterilization device according to claim 1, characterized in that: The communication channels connecting the cavities are all provided with sealing lips.

6. A method for sterilizing packaging materials, characterized in that: Using the packaging material sterilization device according to any one of claims 1 to 5, the method comprises: S01, passing the packaging materials around the feeding cavity, the sterilization cavity, the liquid collecting cavity, the hot air cavity and the discharging cavity respectively; S02, the vaporizer vaporizes the sterilant and sprays the sterilant vapor toward the packaging material in the sterilization chamber through the sterilant nozzle; S03. The air pump extracts the waste gas in the hot air cavity and the feed cavity, and after being filtered by the filter and sterilized by the air processor, it is sprayed to the packaging material in the hot air cavity and fills the discharge cavity through the hot air nozzle to form an air circulation.

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