CN111392139A

CN111392139A - Packaging material sterilization device and sterilization method

Info

Publication number: CN111392139A
Application number: CN202010317761.5A
Authority: CN
Inventors: 王应江
Original assignee: Shanghai Precise Packaging Co ltd
Current assignee: Shanghai Pulisheng Mechanical Equipment Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-07-10

Abstract

The invention discloses a packaging material sterilization device and a sterilization method. The steam assembly is communicated with the sterilization assembly, the steam assembly generates sterilizing agent steam, the sterilizing agent steam is sprayed out at a high speed through the sterilization assembly to sterilize the surface of the packaging material in the steam assembly, the circulating assembly in the evaporation assembly extracts waste gas in the evaporation assembly, the waste gas is input into the evaporation assembly again after being neutralized, filtered and purified and is sprayed out through the hot air nozzle, and the packaging material in the evaporation assembly is dried. Adopt high-pressure sterilizing agent steam directly to spray the surface of packaging material and disinfect, the sterilization is thorough fast, and the sterilization is efficient, and the sterilizing agent that the packaging material surface adhesion consumed is few, and the sterilizing agent consumes fewly, and use cost is low, has ensured the quality of being packed the product simultaneously.

Description

Packaging material sterilization device and sterilization method

Technical Field

The invention relates to the technical field of sterilization of coiled materials, in particular to a sterilization device and a sterilization method for a reel-shaped packaging material.

Background

In the food industry, web-formed packaging systems are currently the most widely used packaging systems for the aseptic packaging of commercially sterile liquid food products such as juices, beverages, milk and the like. Currently, a roll-shaped packaging material used in a liquid food filling machine is a multi-layer composite packaging material formed by compounding paper, multi-layer plastic and aluminum foil. The method for sterilizing the packaging material in the liquid food filling machine using the reel-shaped packaging material comprises the steps of soaking the packaging material in high-temperature hydrogen peroxide liquid, blowing off the hydrogen peroxide liquid residue on the surface of the packaging material by high-temperature sterile air, and finally evaporating the hydrogen peroxide residue on the surface of the packaging material in a closed cavity at a certain temperature to finish the sterilization of the reel-shaped packaging material.

The existing method for sterilizing the reel-shaped packaging material of the high-speed liquid food filling machine has the following defects: after the packaging material is soaked in hydrogen peroxide liquid, the hydrogen peroxide liquid adsorbed and taken away from the surface is more, the consumption of the sterilizing agent hydrogen peroxide is overlarge, and the use cost is high; after the packaging material is soaked in the hydrogen oxide, more hydrogen peroxide liquid can permeate into the edges on the two sides of the packaging material, and the hydrogen peroxide liquid is difficult to remove in the drying process, so that the quality of a packaged product is influenced, and the using effect is poor; when the packaging material passes through the hydrogen peroxide liquid, the motion state of the packaging material is changed due to the resistance and stirring of the hydrogen peroxide liquid, the packaging material is unstable in operation, easy to deviate and poor in use stability; fourthly, the surface of the packaging material has more hydrogen peroxide residues, the energy consumption required by heating, heat preservation and drying evaporation of the hydrogen peroxide is higher, and the energy-saving and environment-friendly benefits are poor; and fifthly, the thinner packaging material is easy to soften or break after being soaked, is not suitable for products with high requirements on the quality of the packaging material, and has narrow application range.

Disclosure of Invention

The invention aims to provide a sterilization device and a sterilization method which are simple in structure and operation, lower in use cost and energy consumption and improve the sterilization efficiency of a packaging material.

In order to solve the above technical problem, the present invention provides a packaging material sterilization apparatus, comprising:

the steam assembly is connected with the sterilizing agent tank, the steam assembly is provided with a sterilizing agent pump and a gasifier, and the sterilizing agent pump and the gasifier are sequentially communicated with the sterilizing agent tank;

the sterilization assembly is provided with a sterilization cavity, a plurality of groups of sterilizing agent nozzles are arranged in the sterilization cavity, the sterilizing agent nozzles are communicated with the gasifier, a liquid collecting cavity is communicated below the sterilization cavity, and the steering roller is arranged in the liquid collecting cavity;

the evaporation assembly is provided with a hot air cavity, the hot air cavity is arranged above the liquid collection cavity, and a hot air nozzle is arranged in the hot air cavity;

the circulating assembly comprises an upper cavity, the upper cavity is divided into a feeding cavity and a discharging cavity through a partition plate, an air port is formed in the partition plate, the inlets of the filter, the air pump and the air processor are sequentially connected with the feeding cavity and the hot air cavity, and the outlet of the air processor is connected with the hot air nozzle and the discharging cavity;

the upper cavity, the sterilization cavity, the liquid collecting cavity and the hot air cavity are communicated into a whole through a communication channel to form a relatively sealed space, and the packaging material sequentially penetrates through the cavities.

As a preferred embodiment, the sterilization cavity and the hot air cavity are arranged above the liquid collecting cavity side by side, the outlet of the feeding cavity is communicated with the inlet at the upper part of the sterilization cavity, the outlet at the lower part of the sterilization cavity is communicated with the inlet of the liquid collecting cavity, the outlet of the liquid collecting cavity is communicated with the inlet of the hot air cavity, and the outlet of the hot air cavity is communicated with the discharging cavity.

As a preferred embodiment, the sterilant nozzle and the hot air nozzle are arranged facing the two sides of the packaging material inside the sterilization chamber and the hot air chamber, respectively.

In a preferred embodiment, the hot air cavity is arranged in the discharge cavity, the outlet of the feeding cavity is communicated with the inlet at the upper part of the sterilization cavity, the outlet at the lower part of the sterilization cavity is communicated with the inlet of the liquid collecting cavity, the outlet of the liquid collecting cavity is communicated with the inlet at the lower part of the sterilization cavity, and the outlet at the upper part of the sterilization cavity is communicated with the hot air cavity.

In a preferred embodiment, the sterilizing agent nozzles are arranged in the middle and outside of the packaging material on both sides of the turning roll, respectively, and the sterilizing agent nozzles are directed towards both sides of the two sheets of packaging material, respectively.

As a preferred embodiment, two sets of sterilant nozzles are provided, arranged on either side of the packaging material between the feed and collecting chambers.

As a preferred embodiment, a plurality of tiny air holes are uniformly arranged on the sterilizing agent nozzle and the hot air nozzle, the sterilizing agent nozzle and the hot air nozzle are arranged in a downward inclination mode, and the included angle between the sterilizing agent nozzle or the hot air nozzle and the vertical direction is 10-80 degrees.

As a preferred embodiment, the sterilizing cavity and the liquid collecting cavity are both communicated with a purifying tank, and purifying liquid is arranged in the purifying tank.

In a preferred embodiment, a sealing lip is disposed on each of the communication channels communicating with the cavities.

The invention also provides a packaging material sterilization method, which comprises the following steps:

s01, respectively bypassing the packaging material around the feeding cavity, the sterilizing cavity, the liquid collecting cavity, the hot air cavity and the discharging cavity;

s02, gasifying a sterilizing agent by the gasifier and spraying sterilizing agent steam to the packaging material in the sterilizing cavity through a sterilizing agent nozzle;

s03, the air pump extracts waste gas in the hot air cavity and the feeding cavity, the waste gas is filtered by the filter and sterilized by the air processor, and then the waste gas is sprayed to the packaging material in the hot air cavity through the hot air nozzle and is filled with the discharging cavity, so that air circulation is formed.

Compared with the prior art, the packaging material and the packaging method have the beneficial effects that:

1. high-pressure sterilizing agent steam is directly sprayed on the surface of the packaging material for sterilization, so that the sterilization is rapid and thorough, the sterilization efficiency is high, and the method is safe and reliable;

2. the surface of the packaging material is sterilized by adopting high-temperature sterilizing agent steam, so that the sterilizing agent attached to the surface is less in consumption, the sterilizing agent is less in consumption, and the use cost is low;

3. the surface sterilizing agent has less residue after the packaging material is sterilized, the quality of the packaged product is ensured, the use safety is high, and the use effect is better;

4. the sterilization process does not affect and damage the properties of the packaging material, does not affect the running track of the packaging material, has low requirements on the quality and the thickness of the packaging material, and has wider applicable packaging material range;

5. the sterilizing agent has the advantages of low energy consumption for heating, spraying, drying and evaporating, low use cost, energy conservation and environmental protection.

Drawings

FIG. 1 is a schematic diagram of an overall structure of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure of a second embodiment of the present invention;

fig. 3 is a schematic diagram of the overall structure of the embodiment of the invention.

The reference numbers in the figures illustrate: 1. a sterilizing agent groove, 2, a sterilizing agent pump, 3, a gasifier, 4, a sterilizing agent nozzle, 5, a guide roller, 6, a packaging material, 7, an upper cavity, 8, an air processor, 9, an air pump, 10, a filter, 11, a purifying groove, 12, a steering roller, 13, a liquid collecting cavity, 14, a sterilizing cavity, 15, a hot air cavity, 16, a hot air nozzle, 17, a feeding cavity, 18, a discharging cavity, 19, a sealing lip, 20, an inlet, 21, an outlet, 22, a return air inlet, 23, a vent, 24, an air inlet, 25, a steam outlet, 26, a return opening, 27, an air outlet, 28, a sterilizing agent pipeline, 29, a hot air pipeline, 30, an air inlet pipe, 31, a return air pipe, 32, an air outlet pipe, 33, an air outlet pipe, 34, a return pipe, 35, a discharge outlet, and a moving direction.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1, there is shown a schematic view of an embodiment of a sterilization apparatus for a packaging material 6 according to the present invention, which includes a steam unit, a sterilization unit, an evaporation unit, and a circulation unit. The steam assembly is communicated with the sterilization assembly, sterilizing agent steam is generated by the steam assembly and is sprayed out at a high speed through the sterilization assembly to sterilize the surface of the packaging material 6 in the steam assembly, waste gas in the evaporation assembly is extracted by the circulation assembly in the evaporation assembly, and the waste gas is neutralized, filtered and purified and then is input into the evaporation assembly again to be sprayed out through the hot air nozzle 16, so that the packaging material 6 in the evaporation assembly is dried.

Specifically, the steam assembly is connected with a sterilizing agent tank 1, the steam assembly is provided with a sterilizing agent pump 2 and a vaporizer 3, and the sterilizing agent pump 2 and the vaporizer 3 are sequentially communicated with the sterilizing agent tank 1 through a sterilizing agent pipeline 28. The sterilizing agent tank 1 is used for storing, heating, and supplying a sterilizing agent. Sterilant pump 2 draws sterilant from sterilant tank 1 through sterilant conduit 28 into vaporizer 3, increasing the pressure of the sterilant within sterilant conduit 28 to a desired pressure. Vaporizer 3 is conventionally configured to heat, pressurize, and vaporize a sterilant in a known manner to form a desired high temperature, high pressure sterilant vapor. The temperature, pressure and degree of vaporization of the sterilant vapor produced by vaporizer 3 can be determined experimentally and optimized to achieve optimal sterilization.

The sterilization component is provided with a sterilization cavity 14, a plurality of groups of sterilizing agent nozzles 4 are arranged in the sterilization cavity 14, and the sterilizing agent nozzles 4 are communicated with the gasifier 3. The packaging material 6 is passed through the sterilization chamber 14 and the sterilant nozzle 4 sterilizes the surface of the packaging material 6. In order to strengthen the impact force of the sterilizing agent steam on the surface of the packaging material 6 and enable the sterilizing agent steam flow sprayed by the sterilizing agent nozzle 4 to peel off and wash away dirt on the surface of the packaging bag, a plurality of micro air holes are uniformly arranged on the sterilizing agent nozzle 4, so that the sterilizing steam can be uniformly sprayed on the surface of the packaging material 6 at a high speed after being heated and pressurized by the gasifier 3. Further, in this embodiment, the sterilant nozzle 4 is inclined downwardly, and the angle between the sterilant nozzle 4 and the vertical is 10-80 °. The gas flow will thus hit the packaging material 6 at an angle with a more downward direction, blowing down the sterilization agent, which angle will be such that the gas flow will blow the sterilization agent in a direction below the package, the effect of the blowing being such that the sterilization agent is more evenly distributed over the packaging material 6 and excess sterilization agent can collect below the sterilization cavity 14. The effective spraying width of the sterilizing agent nozzle 4 is not smaller than the width of the packaging material 6, ensuring thorough sterilization of the packaging material 6. In order to make the residual sterilizing agent liquid on the packaging material 6 drop partially under the action of gravity, so as to reduce the drying workload, a liquid collecting cavity 13 is communicated with the lower part of the sterilizing cavity 14, and a steering roller 12 is arranged in the liquid collecting cavity. The packaging material 6 passes around the turning roll 12 so that the turning roll 12 is the lowest point of the packaging material 6, where the sterilant solution remaining on the packaging material 6 collects and eventually drips into a collecting chamber.

Still have the sterilizing agent to remain on the wrapping 6 after the sterilizing agent steam sprays, for drying wrapping 6, wrapping 6 continues to pass through evaporation assembly, evaporation assembly is provided with hot-blast cavity 15. The hot air cavity 15 is arranged above the liquid collecting cavity 13, namely sterilizing agent residues on the packaging material 6 are naturally dripped to be dried by hot air volatilization. Hot air is sprayed out from a hot air nozzle 16 arranged in the hot air cavity 15, tiny air holes are uniformly arranged on the hot air nozzle 16, so that the hot air can be uniformly sprayed onto the surface of the packaging material 6 at a high speed, the hot air nozzle 16 is arranged in a downward inclined mode, the included angle between the hot air nozzle 16 and the vertical direction is 10-80 degrees, the spraying area is larger, and sterilizing agent residues on the surface of the packaging material 6 are removed through faster evaporation.

Because the sterilizing agent residues on the surface of the packaging material 6 are evaporated into the hot air cavity 15, sterilizing agent residues and other impurities exist in the hot air cavity 15, direct discharge easily causes pollution, and if the hot air cavity 15 is directly communicated with the outside, the hot air cavity 15 is easily polluted, so that the packaging device is provided with the internal circulation assembly. The circulation component comprises an upper cavity 7, the upper cavity 7 is divided into a feeding cavity 17 and a discharging cavity 18 through a partition plate, guide rollers 5 are arranged in the feeding cavity 17 and the discharging cavity 18 respectively, the packaging material 6 enters the feeding cavity 17 from an inlet 20, bypasses the guide rollers 5, sequentially enters the sterilization cavity 14, the liquid collection cavity 13, the hot air cavity 15 and the discharging cavity 18, and flows out from an outlet 21 after being guided by the guide rollers 5 in the discharging cavity 18. In order to improve the sterilization and drying effects on the packaging material 6, the air inlet 24 is arranged on the discharge cavity, sterile hot air is further introduced into the discharge cavity 18 through the air inlet pipe 30, and the packaging material 6 is dried by the hot air component and then dried by the hot air again, so that the drying effect is ensured. Because the hot-blast temperature is higher in ejection of compact cavity 18, for improving hot-blast availability factor, be provided with blow vent 23 on the baffle, consequently the gas in feeding cavity 17 and the ejection of compact cavity 18 can circulate, and the steam in the ejection of compact cavity 18 passes through blow vent 23 and gets into feeding cavity 17, preheats packaging material 6, improves sterilization efficiency. At the moment, waste gas is generated in the hot air cavity 15 and the feeding cavity 17, so that the inlets of the filter 10, the air pump 9 and the air processor 8 are sequentially connected with the feeding cavity 17 and the hot air cavity 15, the air pump 9 sucks the gas in the feeding cavity 17 and the hot air cavity 15, the gas is filtered by the filter 10 and then is processed by the air processor 8 to form sterile high-temperature gas. The outlet 21 of the air processor 8 is connected with 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, and meanwhile, the sterile high-temperature gas fills the discharge cavity 18, so that the drying effect of the packaging material 6 is further ensured.

In order to ensure that the packaging material 6 is always in an aseptic environment in the sterilization and drying processes, the upper cavity 7, the sterilization cavity 14, the liquid collecting cavity 13 and the outlet 21 of the hot air cavity 15 are communicated into a whole through a communication channel to form a relatively sealed space, and the packaging material 6 sequentially passes through the cavities. In order to ensure that the packaging material 6 can smoothly pass through the cavities and simultaneously isolate the cavities from each other so as to prevent the cavities from communicating with the outside air, the communication channel for communicating the cavities is provided with a sealing lip 19. The sealing lip 19 is made of a flexible sealing material resistant to corrosion and high temperature, and does not affect the transport of the packaging material 6 while insulating the air flow.

Referring to fig. 1, which is a schematic view of an embodiment of the present invention, in this embodiment, the sterilization cavity 14 and the hot air cavity 15 are arranged above the liquid collecting cavity 13 side by side, the outlet 21 of the feeding cavity 17 is communicated with the inlet 20 at the upper part of the sterilization cavity 14, the outlet 21 at the lower part of the sterilization cavity 14 is communicated with the inlet of the liquid collecting cavity 13, the outlet 21 of the liquid collecting cavity 13 is communicated with the inlet of the hot air cavity 15, and the outlet 21 of the hot air cavity 15 is communicated with the discharging cavity 18. In this embodiment, the packaging material 6 enters from the feeding cavity 17, then extends downwards into the sterilization cavity 14, and further enters into the liquid collecting cavity 13, and under the guidance of the turning roller 12, the packaging material 6 extends upwards into the hot air cavity 15, and finally enters into the discharging cavity 18 and flows out. That is, the packaging materials 6 on both sides of the turning roll 12 respectively extend into the sterilization cavity 14 and the hot air cavity 15, the packaging materials 6 are first sterilized by sterilant vapor and then dried by hot air, in order to ensure that both sides of the packaging materials 6 can be sterilized and dried, in this embodiment, the sterilant nozzle 4 and the hot air nozzle 16 are respectively arranged to face both sides of the packaging materials 6 in the sterilization cavity 14 and the hot air cavity 15, and at least one set of sterilant spray and hot air nozzle 16 is arranged on each side of the packaging materials 6. When the sterilizing agent nozzle 4 sprays sterilizing agent steam to the surface of the packaging material 6, redundant steam is diffused in the sterilizing cavity 14, so that the sterilizing agent steam is filled in the sterilizing cavity 14, and the packaging material 6 is ensured to be always in a sterilizing state in the sterilizing cavity 14. Since the sterilizing agent vapor is contaminated with impurities after sterilization, the vapor outlet 25 is provided below the sterilizing chamber 14 and communicates with the purifying tank 11 through the outlet pipe 33 in order to collect the sterilized vapor, so that the sterilized vapor in the sterilizing chamber 14 can be introduced into the purifying tank 11. Packaging material 6 after the sterilization continues to get into album liquid cavity 13, packaging material 6 is left to the partial sterilizing agent of bringing into in album liquid cavity 13, simultaneously because album liquid cavity 13 temperature is lower, the sterilizing agent coagulation on packaging material 6 surface becomes liquid, and because the action of gravity drips in album liquid cavity 13, for avoiding album liquid cavity 13 in the liquid remain too much so that submergence packaging material 6, influence packaging material 6's result of use, it is provided with backward flow mouth 26 to collect liquid cavity 13 below, through back flow 34 intercommunication purification groove 11, the sterilizing agent steam and the condensed sterilizing agent residue in album liquid cavity 13 flow equalize and go into purification groove 11. The purification tank 11 is internally provided with a purification liquid which dilutes and neutralizes the residual sterilizing agent flowing into the sterilization cavity 14 and the liquid collection cavity 13, reaches the pollution-free discharge standard and is discharged from the discharge port 35. The packaging material 6 extends out of the liquid collecting cavity 13 and then enters the hot air cavity 15, and when hot air is sprayed to the surface of the packaging material 6 through the hot air nozzle 16, the hot air is dissipated into the hot air cavity 15, so that the hot air cavity 15 is filled with hot air, and the packaging material 6 is guaranteed to be in a high-temperature drying state in the hot air cavity 15 all the time. And the dried packaging material 6 continuously enters the discharging cavity 18, and in order to improve the drying effect of the packaging material 6, hot air is continuously introduced into the discharging cavity 18 to remove the sterilizing agent residues on the surface of the packaging material 6. Because the air temperature in the discharging cavity 18 is higher, in order to make full use of the high-temperature hot gas, the high-temperature hot gas in the discharging cavity 18 enters the feeding cavity 17 through the vent 23, the packaging material 6 in the feeding cavity 17 is preheated, and the sterilization effect of the packaging material 6 is improved. In order to ensure that the gas in the discharge cavity 18 can enter the feeding cavity 17 through the vent 23 and the gas in the feeding cavity 17 can not enter the discharge cavity 18, so as to prevent the gas in the feeding cavity 17 from polluting the sterilized packaging material 6, the size of the vent 23 is optimized and determined according to the pressure difference between the feeding cavity 17 and the discharge cavity 18, and the air pressure of the sterile hot gas in the discharge cavity 18 is higher than the air pressure in the feeding cavity 17. In this embodiment, the hot air cavity 15 and the discharge cavity 18 both have the aseptic hot air to dry the packaging material 6, so there is hot air residue in the hot air cavity 15 and the discharge cavity 18, because the hot air residue in the discharge cavity 18 enters the feeding cavity 17 to preheat the packaging material 6, therefore the filter 10 communicates with the return air inlet 22 on the feeding cavity 17 through the return air pipe 31, communicate with the air outlet 27 on the hot air cavity 15 through the air outlet pipe 32, the air pump 9 sucks the air in the feeding cavity 17 and the hot air cavity 15 processed by the filter 10 through the hot air pipe 29, and conveys the processed clean air to the inside of the air processor 8 through the hot air pipe 29, and the high-pressure aseptic hot air is generated after being processed by the air processor 8. One part of the high-pressure sterile hot gas is conveyed through a hot air pipeline 29 and is sprayed out from a hot air nozzle 16 in a hot air cavity 15, and the other part of the high-pressure sterile hot gas is connected with an air inlet 24 through an air inlet pipe 30 and is conveyed into a discharge cavity 18, so that the circulation of the sterile high-temperature gas is realized.

In the present embodiment, the sterilizing agent in the sterilizing agent tank 1 is pumped by the sterilizing agent pump 2, pressurized, and sent to the inside of the vaporizer 3 through the sterilizing agent pipe 28, and is treated by the vaporizer 3 to generate high-temperature and high-pressure sterilizing agent vapor, and the high-temperature and high-pressure sterilizing agent vapor is sent through the sterilizing agent pipe 28 and sprayed at a high speed and uniformly in a certain direction onto the surface of the packaging material 6, thereby sterilizing the inner and outer surfaces of the packaging material 6. The residual sterilizing agent steam after consumption is discharged into the purifying tank 11 through the steam outlet 25 and the air outlet pipe 33, the residual sterilizing agent steam and condensate in the liquid collecting cavity 13 are discharged into the purifying tank 11 through the return pipe 34 by the return port 26, and are discharged from the discharge port 35 after being treated by the purifying tank 11 to reach the discharge standard, so that the work cycle of the sterilizing agent is completed.

The packaging material 6 enters the feeding cavity 17 from the inlet 20 along the moving direction A for preheating, is supported and guided by the guide roller 5 to enter the sterilizing cavity 14, and the inner surface and the outer surface of the packaging material 6 are sprayed and sterilized by the sterilizing agent nozzle 4. The sterilized packaging material 6 enters the liquid collecting cavity 13, is supported and guided by the turning roller 12 to enter the hot air cavity 15, and the sterile hot air is sprayed by the hot air nozzle 16 to evaporate most of sterilizing agent residues on the inner surface and the outer surface of the packaging material 6. Packaging material 6 continues to move into discharge cavity 18, and sterile hot air in discharge cavity 18 further dries the sterilizing agent residue on the surface of packaging material 6, and removes the sterilizing agent residue on the surface of packaging material 6. The dried packaging material 6 is guided by the support of the guide roller 5 to move out of the discharge chamber 18 from the outlet 21 in the direction of movement a.

The clean air treated by the filter 10 is compressed by the air pump 9 and is delivered to the inside of the air treatment device through the hot air pipeline 29, and the high-pressure sterile hot air is generated after the air treatment device is treated. A part of high-pressure sterile hot air is conveyed through a hot air pipeline 29 and is uniformly sprayed out from the hot air nozzle 16 at a high speed according to a certain direction, and most sterilizing agent residues on the surface of the packaging material 6 are evaporated. Inside the hot air cavity 15, the exhaust gas containing residual sterilizing agent enters the filter 10 again through the air outlet 27 and the air outlet pipe 32. Another part of the high-pressure sterile hot air generated from the air treatment device is delivered to the inside of the discharging cavity 18 through the air inlet pipe 30, and the sterile hot air inside the discharging cavity 18 further dries the sterilizing agent residue on the surface of the packaging material 6, so as to remove the sterilizing agent residue on the surface of the packaging material 6. Sterile hot air in the discharge cavity 18 enters the feeding cavity 17 through the ventilation opening to preheat the packaging material 6 in the feeding cavity 17. The hot sterile air in the feeding chamber 17 is re-introduced into the filter 10 through the return air duct 31 by the return air inlet 22, thereby completing the working cycle of the hot sterile air.

Referring to fig. 2, a schematic structural view of a second embodiment of the present invention is shown, in this embodiment, the hot air cavity 15 is disposed in the discharge cavity 18, that is, the hot air cavity 15 is not separately disposed. At this time, the outlet 21 of the feeding cavity 17 is communicated with the inlet 20 at the upper part of the sterilizing cavity 14, the outlet 21 at the lower part of the sterilizing cavity 14 is communicated with the inlet of the liquid collecting cavity 13, the outlet 21 of the liquid collecting cavity 13 is communicated with the inlet at the lower part of the sterilizing cavity 14, and the outlet 21 at the upper part of the sterilizing cavity 14 is communicated with the hot air cavity 15. The packaging material 6 enters the feeding cavity 17 from the inlet 20, enters the sterilization cavity 14 through the supporting and guiding of the guide roller 5, further enters the liquid collecting cavity 13, enters the sterilization cavity 14 again after being turned by the turning roller 12, finally enters the discharging cavity 18, is evaporated and dried in the discharging 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 reduced without reducing the sterilization effect. In order to ensure the sterilization effect of the packaging materials 6 in the sterilization cavity 14, the size of the sterilization cavity and the width of the packaging materials are considered in the embodiment, three sets of sterilizing agent nozzles 4 are arranged, the sterilizing agent nozzles 4 are respectively arranged in the middle and outside of the packaging materials 6 on both sides of the turning roller 12, and the sterilizing agent nozzles 4 are respectively directed to two surfaces of two pieces of packaging materials 6. That is, both side surfaces of the packaging material 6 are sprayed with the sterilizing agent nozzles 4 for sterilization before the packaging material passes around the steering roller 12, and both side surfaces of the packaging material 6 are sprayed with the sterilizing agent nozzles 4 again for sterilization after the packaging material passes around the steering roller 12, thereby enhancing the sterilization effect. Meanwhile, as the hot air cavity 15 is arranged in the discharge cavity 18 and the hot air nozzle 16 sprays sterile hot air, sterilizing agent residues on the surface of the packaging material 6 are evaporated, redundant hot air is dissipated in the discharge cavity 18, the sterilizing agent residues on the surface of the packaging material 6 are further dried, the drying effect is ensured, and the dried packaging material 6 flows out of the discharge cavity 18 from the outlet 21. And the hot air in the hot air cavity 15, namely the discharge cavity 18, enters the feeding cavity 17 from the air vents 23 completely, so that the filter 10 can extract residual hot air completely only by being communicated with the feeding cavity 17, and the air processor 8 can completely dry the packaging material 6 only by needing the hot air nozzle 16, thereby simplifying the structure of the circulating assembly on the basis of the first embodiment.

Referring to fig. 3, which is a schematic structural view of a third embodiment of the present invention, this embodiment further simplifies the structure of the sterilization assembly based on the second embodiment, and the two sets of sterilant nozzles 4 are disposed on two 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 feed side, and when the packaging material 6 passes around the turning roll 12 and enters the sterilization chamber 14 again, the sterilant vapor floating in the sterilization chamber 14 also has a certain sterilization effect on the packaging material 6. Thereby ensuring the overall sterilization effect of the packaging material 6.

The invention also provides a sterilization method using the sterilization device for the packaging material 6, which comprises the following steps:

s01, the packaging material 6 bypasses the feeding cavity 17, the sterilizing cavity 14, the liquid collecting cavity 13, the hot air cavity 15 and the discharging cavity 18 respectively; the packaging material 6 is always in a closed space for sterilization and drying, so that the sterilization effect on the packaging material 6 is ensured.

S02, the vaporizer 3 vaporizes the sterilizing agent and sprays the vaporized sterilizing agent to the packaging material 6 in the sterilizing cavity 14 through the sterilizing agent nozzle 4; the surface of the packaging material 6 is sterilized by adopting high-temperature sterilizing agent steam, so that the sterilizing agent attached to the surface is less in consumption, the sterilizing agent is less in consumption, the use cost is low, the residual amount of the sterilizing agent on the surface of the packaging material 6 after sterilization is less, and the quality of the packaged product is ensured. Furthermore, the sterilized sterilizing agent residue is collected in the purifying tank 11, and the sterilizing agent residue is purified by the purifying tank 11 until reaching the material pollution discharge standard and then discharged. The circulation of the sterilizing agent is realized, and the energy conservation and the environmental protection are realized.

S03, the air pump 9 extracts waste gas in the hot air cavity 15 and the feeding cavity 17, the waste gas is filtered by the filter 10 and sterilized by the air processor 8, and then the waste gas is sprayed to the packaging material 6 in the hot air cavity 15 through the hot air nozzle 16 and is injected into the discharging cavity 18, so that air circulation is formed, no waste gas is discharged, and the method is safe and environment-friendly.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims

1. A packaging material sterilization apparatus, comprising:

2. The packaging material sterilization device of claim 1, wherein the sterilization cavity and the hot air cavity are arranged side by side above the liquid collection cavity, the outlet of the feeding cavity is communicated with the inlet at the upper part of the sterilization cavity, the outlet at the lower part of the sterilization cavity is communicated with the inlet of the liquid collection cavity, the outlet of the liquid collection cavity is communicated with the inlet of the hot air cavity, and the outlet of the hot air cavity is communicated with the discharge cavity.

3. The packaging material sterilization apparatus of claim 2, wherein the sterilant nozzle and the hot air nozzle are disposed to face opposite sides of the packaging material within the sterilization chamber and the hot air chamber, respectively.

4. The packaging material sterilization device of claim 1, wherein the hot air cavity is disposed in the discharge cavity, the inlet cavity outlet is communicated with the inlet at the upper part of the sterilization cavity, the outlet at the lower part of the sterilization cavity is communicated with the inlet at the lower part of the liquid collection cavity, the outlet at the lower part of the liquid collection cavity is communicated with the inlet at the lower part of the sterilization cavity, and the outlet at the upper part of the sterilization cavity is communicated with the hot air cavity.

5. The packaging material sterilization apparatus of claim 4, wherein said sterilant nozzles are disposed in the middle and outside of the packaging material on either side of said turning roll, respectively, said sterilant nozzles being directed toward either side of the two sheets of packaging material.

6. The packaging material sterilization apparatus of claim 4, wherein two sets of the sterilant nozzles are provided, two sets of the sterilant nozzles being provided on either side of the packaging material between the feed chamber and the drip chamber.

7. The packaging material sterilization apparatus according to claim 1, wherein the sterilizing agent nozzle and the hot air nozzle are uniformly provided with a plurality of minute air holes, the sterilizing agent nozzle and the hot air nozzle are arranged to be inclined downward, and the sterilizing agent nozzle or the hot air nozzle is arranged at an angle of 10 to 80 ° with respect to a vertical direction.

8. The packaging material sterilization apparatus as set forth in claim 1, wherein a purification tank is connected to the lower side of the sterilization chamber and the lower side of the liquid collecting chamber, and a purification liquid is provided in the purification tank.

9. The packaging material sterilization apparatus according to claim 1, wherein a sealing lip is provided on each of said communication passages communicating with each cavity.

10. A method of sterilizing a packaging material, comprising: