An apparatus and method for sterilizing food packaging using mixed gas synergistic atomized peroxide plasma.

Abstract

This invention discloses a device and method for sterilization of food packaging using a mixed gas synergistic atomized peroxide plasma. The device includes sterilization unit I, sterilization unit II, sterilization unit III, sterilization unit IV, alignment box I, alignment box II, exhaust gas treatment system, power distribution system, and gas distribution system. The sterilization units IV, I, III, II, and IV are sequentially connected. The sterilization units I, II, III, and IV are connected to the gas distribution system and the power distribution system, respectively. Sterilization unit IV has an inlet, and alignment box II has an outlet. This device and method enable efficient, stable, and environmentally friendly sterilization of food packaging, providing better protection for the food industry.

Description

Technical Field

[0001] This invention belongs to the field of low-temperature plasma technology, and mainly relates to a plasma sterilization device and method for food packaging. Background Technology

[0002] Food packaging is a crucial element in ensuring food safety and extending shelf life. However, bacteria and other microorganisms in food packaging can sometimes lead to food spoilage and the spread of disease. Therefore, effective sterilization of food packaging is necessary to guarantee food quality and safety.

[0003] Traditional food packaging sterilization methods include heat treatment, chemical sterilization, and radiation sterilization. However, these methods have some limitations. Heat treatment may lead to a loss of food quality, chemical sterilization may leave residues in the food packaging, and radiation sterilization may pose potential risks to the environment and human health. Summary of the Invention

[0004] The purpose of this invention is to provide an apparatus and method for sterilizing food packaging using a mixed gas synergistic atomized peroxide plasma, thereby addressing the problems in the prior art and improving the sterilization effect and safety of food packaging. This apparatus and method enable efficient, stable, and environmentally friendly sterilization of food packaging, providing better protection for the food industry.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A device for sterilization of food packaging using mixed gas synergistic atomized peroxide plasma includes sterilization unit I, sterilization unit II, sterilization unit III, sterilization unit IV, alignment box I, alignment box II, exhaust gas treatment system, power distribution system, and gas distribution system. The sterilization unit IV, alignment box I, sterilization unit III, alignment box I, sterilization unit II, alignment box I, sterilization unit I, and alignment box II are sequentially connected. The sterilization units I, II, III, and IV are respectively connected to the gas distribution system and the power distribution system. The sterilization unit IV has an inlet, and the alignment box II has an outlet.

[0007] The correction box I is used to correct the paper path.

[0008] Preferably, the disinfection unit I, disinfection unit II, disinfection unit III, and disinfection unit IV are arranged sequentially from top to bottom (the disinfection unit II is located directly below the disinfection unit I, the disinfection unit III is located directly below the disinfection unit II, and the disinfection unit IV is located directly below the disinfection unit III). The correction box I and correction box II are located on the left and right sides of the disinfection unit II and the disinfection unit III, respectively. The exhaust gas treatment system is located behind the disinfection unit II and the disinfection unit III. The power distribution system and the gas distribution system are located behind the correction box II and the gas distribution system, respectively.

[0009] Preferably, the disinfection unit I includes a disinfection unit I housing and a disinfection unit I door, and the disinfection unit I housing and the disinfection unit I door are connected for opening and closing;

[0010] The bottom of the disinfection unit I housing has connection ports I and II at both ends. Connection port I connects to the correction box I, and connection port II connects to the correction box II. The back panel of the disinfection unit I housing has a high-pressure interface, a gas path interface, and a one-way valve. The gas path interface connects to the gas distribution system, and the one-way valve connects to the exhaust gas treatment system. The one-way valve prevents activated gas from flowing into the exhaust gas treatment system during the discharge process of the disinfection unit, which would reduce the concentration of activated gas in the disinfection unit. After the disinfection unit finishes discharging, the one-way valve opens, and the exhaust gas treatment system treats any remaining activated gas in the treatment chamber. The interior of the disinfection unit I housing includes roller bracket I, a pull-out unit, mounting rails, a support frame, roller bracket II, and roller bracket III. The pull-out unit is slidably connected to the mounting rails, allowing for rapid pulling along the rails. The support frame is located in the middle of the disinfection unit I housing. Roller bracket I, roller bracket II, and roller bracket III are located at opposite ends of the disinfection unit I housing. Roller bracket I is near connection port I, and roller bracket II and roller bracket III are near connection port II. Roller bracket I and roller bracket II are connected to the bottom of the disinfection unit I housing, and roller bracket III is connected to the top of the disinfection unit I housing. An exhaust gas collector is located on one side of the housing and is connected to an exhaust gas treatment system.

[0011] The disinfection unit I has a door handle and an emergency handle.

[0012] Preferably, the roller bracket I, mounting rail, support frame, roller bracket II, and roller bracket III of the disinfection unit I are fixedly connected to the housing of the disinfection unit I.

[0013] Preferably, the roller bracket I of the disinfection unit I is located inside the left side of the disinfection unit I housing and is connected to the disinfection unit I housing via studs; roller brackets II and III are located inside the right side of the disinfection unit I housing and are connected to the disinfection unit I housing via studs; the support frame is located in the middle inside the disinfection unit I housing to improve structural stability. An elongated hole is opened on the right side of the disinfection unit I housing, and an exhaust gas collector is connected to the right side of the disinfection unit I housing via screws to balance air pressure and collect exhaust gas from the equipment. The door of the disinfection unit I housing is connected to the disinfection unit I housing via hinges, and the emergency handle and door handle are fixed to the door surface with screws.

[0014] Preferably, the high-pressure interface and gas path interface of the disinfection unit I are located on the surface of the disinfection unit I housing. The power distribution system enters the pull-out unit through the high-pressure interface via a high-voltage line and connects to the plasma module. The gas path interface is connected to the gas distribution system and is used to introduce mixed gas into the equipment. A one-way valve is used to provide an exhaust gas interface, which is connected to the exhaust gas treatment system via a pipeline.

[0015] Preferably, the pull-out unit includes a pull-out unit housing, and the interior of the pull-out unit housing is provided with a fan frame I, a support plate, a plasma module, a fan frame II, a limiting frame, and a fan; the fan frame I and the fan frame II are located on the upper and lower sides of the pull-out unit housing, respectively, and are placed diagonally, and the fan is placed inside the fan frame I and the fan frame II; the plasma module is located in front of the fan frame II, the plasma module is connected to the bottom of the pull-out unit housing, the plasma module is connected to the power distribution system, the limiting frame is located in the middle of the pull-out unit housing, one end of the limiting frame is connected to the pull-out unit housing, the other end of the limiting frame is connected to the top of the support plate, and the bottom of the support plate is connected to the pull-out unit housing.

[0016] Preferably, fan frame I and fan frame II need to be placed diagonally, and the fan frame can freely adjust the air outlet angle.

[0017] Preferably, all internal components of the pull-out unit are fixedly connected.

[0018] Preferably, the pull-out units are arranged in parallel or in an array within the disinfection unit.

[0019] Preferably, the plasma module is placed in front of the fan frame II and connected to the lower side of the pull-out unit housing by screws. The limiting bracket is located inside the quick-extraction unit housing and is connected to the quick-extraction unit housing by countersunk screws to protect the plasma module. The support plate is welded to the lower side of the quick-extraction unit housing and connected to the limiting bracket by screws to enhance the stability of the limiting bracket.

[0020] Preferably, the structure of the plasma module is based on existing technology in the art and is used to generate plasma. The dielectric material used to generate plasma via dielectric barrier discharge is typically quartz.

[0021] Preferably, the internal structure of disinfection unit II, disinfection unit III, and disinfection unit IV is basically the same as that of disinfection unit I; the pull-out unit structure in disinfection unit I, disinfection unit II, disinfection unit III, and disinfection unit IV is the same; disinfection unit II and disinfection unit III are provided with a connecting flange on the left side for connecting to the right interface of correction box I, and disinfection unit IV is provided with a connecting flange on the upper left side for connecting to the lower interface of correction box I, so that the disinfection units can be interconnected through the connecting flange connection.

[0022] Specifically, the disinfection unit II includes a disinfection unit II housing and a disinfection unit II door, which are connected for opening and closing.

[0023] The disinfection unit II housing has a connecting flange on one side, which is connected to the correction box I. The back plate of the disinfection unit II housing has a high-pressure interface, an air path interface, and a one-way valve. The air path interface is connected to the air distribution system, and the one-way valve is connected to the exhaust gas treatment system. The interior of the disinfection unit II housing has a roller bracket I, a pull-out unit, and a mounting rail. The pull-out unit is slidably connected to the mounting rail. The roller bracket I is located away from the connecting flange and is connected to the bottom of the disinfection unit II housing.

[0024] The disinfection unit II box door is equipped with a door handle and an emergency handle;

[0025] The structure of disinfection unit III is the same as that of disinfection unit II.

[0026] Preferably, the roller bracket I and the mounting rail of the disinfection unit II are fixedly connected to the disinfection unit II.

[0027] Specifically, the disinfection unit IV includes a disinfection unit IV housing and a disinfection unit IV door, which are connected for opening and closing.

[0028] The disinfection unit IV housing has an equipment inlet and a connecting flange at one end. The connecting flange is located above the equipment inlet and is connected to the correction box I. The back panel of the disinfection unit IV housing has a high-pressure interface, a gas interface, and a one-way valve. The gas interface is connected to the gas distribution system, and the one-way valve is connected to the exhaust gas treatment system. The interior of the disinfection unit IV housing includes a roller bracket I, a pull-out unit, a mounting rail, a support frame, and a roller bracket II. The pull-out unit is slidably connected to the mounting rail. The support frame is located in the middle of the disinfection unit IV housing. The roller brackets I and II are located at both ends of the disinfection unit IV housing. The roller bracket I is closer to the equipment inlet, and the roller bracket II is farther from the equipment inlet. The roller brackets I and II are connected to the bottom of the disinfection unit IV housing.

[0029] The disinfection unit IV box door is equipped with a door handle and an emergency handle.

[0030] Preferably, the roller bracket I, mounting rail, support frame, and roller bracket II of the disinfection unit IV are fixedly connected to the housing of the disinfection unit IV.

[0031] Preferably, the opening and closing directions of the disinfection unit IV, disinfection unit II, and disinfection unit III are opposite to those of the disinfection unit I.

[0032] Preferably, the correction box I includes a correction box I body and a correction box I correction door, and the correction box I body and the correction box I correction door are connected for opening and closing.

[0033] The interior of the correction box I is equipped with a correction mechanism, roller support I, and roller support II. Roller support I is located at the top of the box and is connected to the top of the correction box I. Roller support II is located at the bottom of the correction box I and is connected to the bottom of the correction box I. The correction mechanism is located between roller support I and roller support II and is connected to one side of the correction box I. The other side of the correction box I is provided with connection port I and connection port II. Connection port II is located below connection port I. The bottom of the correction box I is provided with connection port III. The top of the correction box I is provided with a connecting flange. Connection port I is connected to disinfection unit II, connection port II is connected to disinfection unit III, connection port III is connected to disinfection unit IV, and the connecting flange is connected to disinfection unit I.

[0034] The correction box I has a correction door equipped with a door handle and an emergency handle.

[0035] The alignment box I is connected to the sterilization unit IV, sterilization unit III, sterilization unit II, and sterilization unit I respectively via the connecting flange, connecting port I, connecting port II, and connecting port III. The alignment box I is used to realize the connection between each sterilization unit and the paper path correction of food packaging materials.

[0036] Preferably, the correction mechanism, roller bracket I, and roller bracket II of the correction box I are fixedly connected to the box body of the correction box I.

[0037] Preferably, the correction box II includes a correction box II housing and a correction box II door, and the correction box II housing and the correction box II door are connected for opening and closing;

[0038] The interior of the correction box II is equipped with a correction mechanism and a roller support I. The roller support I is located at the lower part of the correction box II and is connected to the bottom of the correction box II. The correction mechanism is located at the upper part of the correction box II and is connected to one side of the correction box II. The other side of the correction box II is equipped with an equipment outlet. The top of the correction box II is equipped with a connecting flange, which is connected to the disinfection unit I.

[0039] The correction box II has a door handle and an emergency handle.

[0040] The alignment box II is connected to the sterilization unit I via a connecting flange. The alignment box II is used to correct the paper path of food packaging materials.

[0041] Preferably, the correction mechanism of the correction box II, the roller bracket I, and the box body of the correction box II are fixedly connected.

[0042] Preferably, the opening and closing directions of the correction box I and the correction box II are opposite.

[0043] Preferably, the device further includes a bracket, on which the disinfection unit I, disinfection unit II, disinfection unit III, disinfection unit IV, correction box I, and correction box II are placed and secured with screws on the bracket.

[0044] Preferably, the exhaust gas treatment system is connected to the exhaust pipe.

[0045] Preferably, the disinfection unit IV is connected to the correction box I via a connecting flange and the connection port III of the correction box I. The correction box I is connected to the disinfection unit III via a connecting port II and a connecting flange. The correction box I is connected to the disinfection unit II via a connecting port I and a connecting flange. The correction box I is connected to the disinfection unit I via a connecting flange and the connection port I of the disinfection unit I. The disinfection unit I is connected to the correction box II via a connecting port II and a connecting flange.

[0046] Preferably, the length of the disinfection unit can be increased or decreased according to the length of the packaging material and the time. The residence time of the packaging material in the disinfection unit should be greater than or equal to 30 seconds, for example, 30 seconds to 1 minute.

[0047] Preferably, to ensure mechanical transmission efficiency, the diameter of the transmission unit roller in the disinfection unit is greater than 51mm.

[0048] Preferably, the disinfection unit can achieve a tight connection between each disinfection unit by adding bolts or clamping mechanisms at the connecting flange.

[0049] Preferably, the device further includes a support, on which the disinfection unit I, disinfection unit II, disinfection unit III, disinfection unit IV, correction box I, and correction box II are placed, and the support is a support for the disinfection unit.

[0050] Preferably, the disinfection unit I is provided with an upper plate I above it, the power distribution system and the gas distribution system are provided with an upper plate II, a side plate I and a rear plate I outside the power distribution system and the gas distribution system, the upper plate II is provided above the power distribution system and the gas distribution system, the side plate I is provided to the side of the power distribution system and the gas distribution system, the rear plate I is provided directly behind the power distribution system, the exhaust gas treatment system is provided with a side plate II, a rear plate II and a rear plate III outside the system, the rear plate II is located below the rear plate III, the upper plate II is connected to the side plate I and the rear plate I, and the side plate II is connected to the rear plate II and the rear plate III.

[0051] Preferably, in disinfection unit I, roller support I has two rollers, and roller support II and roller support III each have one roller. In disinfection units II and III, roller support I has one roller. In disinfection unit IV, roller support I has two rollers, and roller support II has one roller. In alignment box I, roller support I and roller support II each have two rollers. In alignment box II, roller support I has one roller.

[0052] Preferably, the upper plate I is located above the disinfection unit I and is connected by screws; the disinfection units I, II, III, and IV are connected to each other through the connecting flanges of the correction box I and the correction box II, and the disinfection units II, III, and IV are connected to the correction box I through their respective connecting flanges; the equipment inlet is located at the inlet of the disinfection unit IV and is connected by screws. The power distribution system and the gas distribution system are respectively equipped with brackets for placing the power distribution system and the gas distribution system. The power distribution system is located directly behind the correction box II, and the gas distribution system is located directly in front of the power distribution system. The bracket of the gas distribution system is connected to the bracket of the disinfection unit IV by screws. The upper plate II is located above the power distribution system and the gas distribution system, and is connected to the brackets of the disinfection unit and the power distribution system by screws. The rear panel I is located directly behind the power distribution system and is connected to the bracket of the power distribution system by screws. The exhaust gas treatment system is located directly behind the disinfection unit II. At the same time, the rear panel III has a through hole for the exhaust pipe to pass through. The exhaust pipe is directly connected to the exhaust gas treatment system. The rear panel III is connected to the bracket of the disinfection unit by screws. The rear panel II is connected to the rear panel of the exhaust gas treatment system by screws. The side plate II is connected to the rear panel II and the rear panel III by threads. The side plate I is connected to the upper plate I, the disinfection unit bracket, and the rear plate I by screws.

[0053] Preferably, all components of the device are made of metals with good corrosion resistance, such as 304 stainless steel and 316 stainless steel.

[0054] Preferably, the power distribution system includes a power supply, which is an AC power supply with a peak voltage adjustment range of 0-20kV and a frequency adjustment range of 1-50kHz; or a pulse power supply with a peak voltage adjustment range of 0-20kV and a frequency adjustment range of 1-30kHz.

[0055] Preferably, the gas source of the gas mixing system includes nitric oxide and nitrogen dioxide as a mixed gas, which synergistically atomizes peroxide. The gas mixing system includes an atomizer, a nitric oxide and nitrogen dioxide mixed gas inlet, and a compressed air inlet. The compressed air inlet is connected to the gas path interface of the disinfection unit through the atomizer, and the nitric oxide and nitrogen dioxide mixed gas inlet is connected to the gas path interface of the disinfection unit. The disinfection unit is supplied with nitric oxide and nitrogen dioxide as a mixed gas, which simultaneously atomizes peroxide, such as hydrogen peroxide or peracetic acid. Nitric oxide and nitrogen dioxide are stored in gas cylinders, and the gas flow rate into the disinfection unit is controlled by a pressure gauge. Liquid peroxide and an ultrasonic atomizing plate are placed in the atomizer, and the atomized peroxide is introduced into the disinfection unit by applying compressed air to the atomizer.

[0056] Preferably, the volume ratio of nitric oxide to nitrogen dioxide is 1:1, the total gas flow rate after mixing nitric oxide and nitrogen dioxide is controlled at 100 mL / min-150 mL / min, the peroxide concentration is controlled at 30%-35%, and the total compressed air flow rate is controlled at 100 mL / min-150 mL / min.

[0057] The present invention also provides a method for sterilizing food packaging materials using a mixed gas synergistic atomized peroxide plasma sterilization device for food packaging, comprising the following steps:

[0058] Packaging materials are inserted into the device through the equipment inlet, passing sequentially through disinfection unit IV, correction box I, disinfection unit III, correction box I, disinfection unit II, correction box I, disinfection unit I, and correction box II, and finally exiting from the equipment outlet. During disinfection, the gas inside the disinfection unit is driven by the internal airflow generated by the fan, and is repeatedly activated by the plasma module to form plasma, thereby achieving the disinfection of bacteria on the surface of the packaging materials inside the device.

[0059] Specifically, the packaging material enters the device through the equipment inlet and enters the disinfection unit IV. Within disinfection unit IV, it sequentially passes through roller support I, a pull-out unit, roller support II, another pull-out unit, and roller support I again. It then enters the alignment box I via a connecting flange. Within alignment box I, it passes through roller support I again and enters the disinfection unit III via a connecting flange. Within disinfection unit III, it sequentially passes through a pull-out unit, roller support I, and another pull-out unit. It then enters the alignment box I via a connecting flange. Within alignment box I, it passes through roller support I, the alignment mechanism, and roller support I again. I. It enters the disinfection unit II through the connecting flange. In the disinfection unit II, it passes through the pull-out unit, roller support I, and pull-out unit in sequence. It then enters the correction box I through the connecting flange. In the correction box I, it passes through the roller support II and enters the disinfection unit I through the connecting flange. In the disinfection unit I, it passes through the roller support I, pull-out unit, roller support II, pull-out unit, roller support I, pull-out unit, and roller support III in sequence. It then enters the correction box II. In the correction box II, it passes through the correction mechanism and roller support I in sequence, and finally exits from the equipment outlet.

[0060] Preferably, before sterilization begins, the food packaging material is inserted into the sterilization device through the inlet. The packaging material passes through sterilization unit IV, correction box I, sterilization unit III, correction box I, sterilization unit II, correction box I, sterilization unit I, and correction box II in sequence, ensuring that the packaging material passes through each set of sterilization units. During sterilization, the gas distribution system and exhaust gas treatment system are turned on first to make the mixed gas and atomized peroxide evenly distributed in the sterilization unit. After the gas volume stabilizes, all plasma modules and internal fans are turned on. The gas in the sterilization unit is driven by the internal airflow formed by the fans and repeatedly activated by the plasma modules to form highly active and high-density plasma. After a period of time, the bacteria on the surface of the packaging material in the cavity are quickly sterilized.

[0061] This invention utilizes plasma sterilization to generate highly active substances that adhere to the surface of packaging materials, disrupting the DNA structure of bacteria and thus achieving sterilization. By employing mixed gas synergistic atomized peroxide plasma technology, a higher concentration of active substances can be generated, increasing the bactericidal factor and further disrupting the bacterial cell structure, thereby enhancing the sterilization effect.

[0062] The mixed gas synergistic atomized peroxide plasma technology of this invention has many advantages. First, it is a non-contact sterilization method, avoiding physical damage to food packaging. Second, the mixed gas synergistic atomized peroxide plasma contains multiple sterilization factors, possessing strong bactericidal capabilities and effectively inactivating microorganisms on the packaging surface. Furthermore, the mixed gas synergistic atomized peroxide plasma technology is environmentally friendly, producing no harmful substances or radiation.

[0063] Compared with the prior art, the present invention has the following advantages:

[0064] (1) The internal components of the sterilization chamber are highly compact, and the plasma distribution is uniform and stable. The pull-out unit design facilitates equipment maintenance and component replacement.

[0065] (2) Under the same conditions, mixed gas synergistic atomized peroxide plasma has a better sterilization effect than air plasma discharge alone due to the synergistic effect of multiple sterilization factors.

[0066] (3) The diagonal arrangement of the fans in the pull-out unit is conducive to the internal gas circulation activation and improves the plasma activation efficiency.

[0067] (4) The pull-out unit is equipped with a support rod to avoid direct contact between the plasma module and the material being processed, thereby improving the stability of the discharge system.

[0068] (5) The sterilization device has multiple interfaces on the rear panel, which can freely change the composition of the discharge gas, change the gas flow rate, and change the exhaust gas flow rate. Attached Figure Description

[0069] Figure 1 A schematic diagram of the structure of the sterilization chamber provided by the present invention, wherein (a) is a front view and (b) is a back view;

[0070] Figure 2 The diagram shows the structure of the disinfection unit I provided by the present invention, wherein (a) is a front view, (b) is an internal view of the device, and (c) is a rear view;

[0071] Figure 3 This is a schematic diagram of the structure of the fast extraction unit provided by the present invention;

[0072] Figure 4 A three-dimensional structural schematic diagram of the fast drawing unit provided by the present invention;

[0073] Figure 5 This is a schematic diagram of the structure of the disinfection unit II provided by the present invention, wherein (a) is a front view and (b) is an internal view of the device.

[0074] Figure 6 This is a schematic diagram of the structure of the disinfection unit IV provided by the present invention, wherein (a) is a front view and (b) is an internal view of the device.

[0075] Figure 7 This is a schematic diagram of the structure of the correction box I provided by the present invention.

[0076] Figure 8 This is a schematic diagram of the structure of the correction box II provided by the present invention.

[0077] Figure 9 This is a schematic diagram of the structure of the disinfection unit support provided by the present invention.

[0078] In the diagram: 1. Top panel I, 2. Disinfection unit I, 3. Correction box I, 4. Equipment inlet, 5. Disinfection unit IV, 6. Power distribution system, 7. Gas distribution system, 8. Side panel I, 9. Disinfection unit III, 10. Correction box II, 11. Disinfection unit II, 12. Top panel II, 13. Exhaust pipe, 14. Rear panel I, 15. Exhaust gas treatment system, 16. Rear panel II, 17. Side panel II, 18. Rear panel III, 19. Disinfection unit bracket, 201. Emergency handle of disinfection unit I, 202. Door handle of disinfection unit I, 203. Door of disinfection unit I, 204. Exhaust gas collector, 205. Body of disinfection unit I, 206. Roller bracket I of disinfection unit I, 207. 208. Pull-out unit of disinfection unit I; 209. Support frame of disinfection unit I; 210. Roller bracket II of disinfection unit I; 211. Roller bracket III of disinfection unit I; 212. High-pressure interface of disinfection unit I; 213. Air interface of disinfection unit I; 214. One-way valve of disinfection unit I; 215. Connection port I of disinfection unit I; 207a. Pull-out unit housing; 207b. Fan frame I; 207c. Support plate; 207d. Plasma module; 207e. Fan frame II; 207f. Fan; 207g. Limiting bracket; 502. Emergency handle of disinfection unit IV; 503. Door handle of disinfection unit IV; 504. Disinfection unit... 505. Door of Unit IV; 506. Body of Unit IV; 507. Check valve of Unit IV; 508. Connecting flange of Unit IV; 509. Roller bracket I of Unit IV; 510. Pull-out unit of Unit IV; 511. Support frame of Unit IV; 902. Roller bracket II of Unit IV; 903. Connecting flange of Unit II; 904. Door of Unit II; 905. Body of Unit II; 906. Check valve of Unit II; 907. Emergency handle of Unit II; 908. Pull-out unit of Unit II; 909. Roller bracket I of Unit II; 900. Door handle of Unit II; 301. 1. Connecting flange of correction box I; 302. Correction mechanism of correction box I; 303. Correction door of correction box I; 304. Connection port I of correction box I; 305. Emergency handle of correction box I; 306. Connection port II of correction box I; 307. Roller support I of correction box I; 308. Connection port III of correction box I; 309. Roller support II of correction box I; 310. Box body of correction box I; 1001. Connecting flange II of correction box II; 1002. Correction mechanism of correction box II; 1003. Correction door of correction box II; 1004. Roller support I of correction box II; 1005. Emergency handle of correction box II; 1006. Equipment outlet; 1007. Box body of correction box II. Detailed Implementation

[0079] The invention will now be described in detail with reference to the accompanying drawings.

[0080] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0081] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0082] Example 1

[0083] like Figures 1 to 9As shown, a device for sterilization of food packaging using mixed gas synergistic atomized peroxide plasma includes sterilization unit I 2, sterilization unit II 11, sterilization unit III 9, sterilization unit IV 5, correction box I 3, correction box II 10, exhaust gas treatment system 15, power distribution system 6, and gas distribution system 7. The sterilization unit IV, correction box I 3, sterilization unit III 9, correction box I 3, sterilization unit II, correction box I 10, sterilization unit I, and correction box II are connected in sequence. The sterilization unit I, sterilization unit II 11, sterilization unit III 9, and sterilization unit IV 5 are respectively connected to the gas distribution system 6 and the power distribution system 7. The sterilization unit IV 5 is provided with an equipment inlet 4, and the correction box II 10 is provided with an equipment outlet exhaust gas treatment system. The disinfection units I 2, II 11, III 9, and IV 5 are arranged sequentially from top to bottom (the disinfection unit II 11 is located directly below the disinfection unit I 2, the disinfection unit III 9 is located directly below the disinfection unit II 11, and the disinfection unit IV 5 is located directly below the disinfection unit III 9). The correction box I and correction box II are located on the left and right sides of the disinfection units II and III 9, respectively. The exhaust gas treatment system 15 is located behind the disinfection units II 11 and III 9. The power distribution system 6 and the gas distribution system 7 are located behind the correction box II, and the power distribution system 6 is located behind the gas distribution system 7. The disinfection unit I is provided with an upper plate I above it. The power distribution system 6 and the gas distribution system 7 are provided with an upper plate II 12, a side plate I8 and a rear panel I14 on the outside. The power distribution system 6 and the gas distribution system 7 are provided with an upper plate II 12 above them. The power distribution system 6 and the gas distribution system 7 are provided with a side plate I 8 on their sides. The power distribution system is provided with a rear panel I directly behind it. The exhaust gas treatment system is provided with a side plate II 17, a rear panel II 16 and a rear panel III 18 on the outside. The rear panel II 16 is located below the rear panel III 18. The upper plate II 12 is connected to the side plate I 8 and the rear panel I14. The side plate II 17 is connected to the rear panel II 16 and the rear panel III 18. The device also includes a bracket 19. The disinfection units I 2, II 11, III 9, IV 5, and correction boxes I 3 and II 10 are placed on the bracket 19 and fixed with screws. The bracket 19 serves as the support for the disinfection units. The upper plate I1 is located above the disinfection unit I 2 and is connected by screws. The disinfection units I 2, II 11, III, and IV are connected to each other via the connecting flanges of correction boxes I and II. The disinfection units II, III, and IV are connected to correction box I via their respective connecting flanges.The power distribution system 6 and the gas distribution system 7 are respectively provided with brackets for placing the power distribution system 6 and the gas distribution system 7. The power distribution system 6 is located directly behind the correction box II 10, and the gas distribution system 7 is located directly in front of the power distribution system 6. The bracket of the gas distribution system 7 is connected to the bracket of the disinfection unit IV 5 by screws. The upper plate II 12 is located above the power distribution system 7 and the gas distribution system 6, and is connected to the bracket 19 of the disinfection unit and the bracket of the power distribution system 7 by screws. The rear panel I 14 is located directly behind the power distribution system 6 and is connected to the bracket of the power distribution system 6 by screws. The exhaust gas treatment system 15 is located directly behind the disinfection unit II 11. At the same time, the rear panel III 18 has a through hole for the exhaust pipe 13 to pass through. The exhaust pipe 13 is directly connected to the exhaust gas treatment system 15. The rear panel III 18 is connected to the bracket 19 of the disinfection unit by screws. The rear panel II 16 is connected to the rear panel of the exhaust gas treatment system 15 by screws. The side plate II 17 is connected to the rear panel II 16 and the rear panel III 14 by threads. Connection 17: Side panel I 8 is connected to upper panel I1, disinfection unit bracket 17, and rear panel I14 via screws. Exhaust gas treatment system.

[0084] The disinfection unit I 2 includes a disinfection unit I housing 205 and a disinfection unit I door 203, which are connected for opening and closing; the disinfection unit I housing 205 and the disinfection unit I door 203 are provided with a door handle and an emergency handle. The bottom of the disinfection unit I housing 205 is provided with connection ports I 214 and II 215 at its left and right ends. Connection port I 214 is located at the left end of the disinfection unit I housing 205, and connection port II 215 is located at the right end of the disinfection unit I housing 205. Connection port I 214 is connected to the correction box I 3, and connection port II 215 is connected to the correction box II 10. Inside the disinfection unit I housing 205, there are roller brackets I 206, pull-out unit 207, mounting rail, support frame 208, roller bracket II 209, and roller bracket III 210. The pull-out unit 207 is slidably connected to the mounting rail 208, and the pull-out unit 207 can slide along the rail to achieve rapid pull-out. Roller bracket I 206 is located on the left side inside the disinfection unit I housing 205 and is connected to the disinfection unit I housing 205 by studs. Roller bracket II 219... 209 and roller bracket III 210 are located inside the right side of the disinfection unit I housing 205, and are connected to the disinfection unit I housing 205 by studs; support frame 208 is located in the middle inside the disinfection unit I housing 205 to improve structural stability. A 230mm long and 2.5mm wide elongated hole is opened on the right side of the disinfection unit I housing 205. Exhaust gas collector 204 is connected to the right side of the disinfection unit I housing 205 by screws to balance air pressure and collect equipment exhaust gas. Exhaust gas collector 204 is connected to exhaust gas treatment system 15. The disinfection unit I housing door 203 is connected to the disinfection unit I housing 205 by hinges, while the emergency handle 201 and door handle 202 are fixed to the door surface by screws.

[0085] The pull-out unit 207 includes a pull-out unit housing 207a. Inside the pull-out unit housing are a fan frame I 207b, a support plate 207c, a plasma module 207d, a fan frame II 207e, a fan 207f, and a limiting frame 207g. Fan frames I 207b and II 207e are located on the upper and lower sides of the pull-out unit housing 207a, respectively, and are placed diagonally. The fan 207f is housed inside the fan frames I and II, and the air outlet angle of the fan frames is adjustable to 15 degrees. The plasma module 207d is placed in front of the fan frame I 207e and connected to the lower side of the pull-out unit housing 207a by screws. The limiting bracket 207g is located inside the pull-out unit housing 207a and is connected to the pull-out unit housing 207a by countersunk screws. The support rod on the limiting bracket 207g is a hollow stainless steel round rod with a diameter of 10mm, used to protect the plasma module 207d. The support plate 207c is welded to the lower side of the quick-extraction unit housing 207a and is connected to the support rod of the limiting bracket 207g by screws to enhance the stability of the limiting bracket.

[0086] The back panel of the disinfection unit I housing 205 is equipped with a high-pressure interface 211, a gas path interface 212, and a one-way valve. The high-pressure interface 211 has a 23mm through-hole in the disinfection unit I housing 205, corresponding to the number of plasma modules. A high-pressure wire passes through the high-pressure interface 211 into the disinfection unit I and connects to the plasma module 207d. The other end of the high-pressure wire connects to the power distribution system 6. The gas path interface 212 connects to the gas distribution system 7 and is used to introduce a mixture of nitric oxide and nitrogen dioxide into the equipment, along with atomized hydrogen peroxide. The gas path interface 212 is a 16mm outer diameter, 14mm inner diameter bent pipe, with the bend facing the fan frame 207e. The one-way valve 213 provides an exhaust gas interface. The one-way valve 213 interface uses a standard KF25 flange and connects to the exhaust gas treatment system 15 via a pipeline.

[0087] The internal structure of disinfection unit II 11, disinfection unit III 9 and disinfection unit IV 5 is basically the same as that of disinfection unit I. Disinfection unit II 11 and disinfection unit III 9 are provided with a connecting flange 901 on the left side for connecting to the interface on the right side of the correction box I 3. Specifically, the disinfection unit II 11 includes a disinfection unit II housing 903 and a disinfection unit II door 902, which are connected for opening and closing. The disinfection unit II door 902 is equipped with a door handle 908 and an emergency handle 905. A connecting flange 901 is provided on the left side of the disinfection unit II housing, which is connected to the correction box I 3. The back panel of the disinfection unit II housing 903 is equipped with a high-pressure interface, a gas path interface, and a one-way valve 904. The high-pressure line passes through the high-pressure interface into the disinfection unit II and is connected to the plasma module. The other end of the high-pressure line is connected to the power distribution system 6. The gas path interface is connected to the gas distribution system 7. The one-way valve 904 is connected to the exhaust gas treatment system 15. The specific details are basically the same as those of the disinfection unit I2. The interior of the disinfection unit II housing 903 is equipped with a roller support I. 907, a pull-out unit 906, and a mounting rail; the pull-out unit 906 is slidably connected to the mounting rail. The roller bracket I 907 is located on the right side of the disinfection unit II housing 903 and is connected to the disinfection unit II housing 903 by studs. The disinfection unit II door 902 is connected to the disinfection unit II housing 903 by hinges, and the emergency handle 905 and door handle 908 are fixed to the door surface by screws. The structure of the pull-out unit 906 of the disinfection unit II 11 is the same as that of the pull-out unit 207 of the disinfection unit I 2. The disinfection unit III has the same structure as the disinfection unit II. The disinfection unit IV 5 includes a disinfection unit IV housing 505 and a disinfection unit IV door 504, which are connected for opening and closing. The disinfection unit IV door is equipped with a door handle and an emergency handle.The disinfection unit IV housing 505 has an equipment inlet 4 and a connecting flange 507 on its left side. The connecting flange 507 is located above the equipment inlet 4 and is connected to the correction box I 3. The back plate of the disinfection unit IV housing 505 has a high-pressure interface, a gas path interface, and a one-way valve. The high-pressure line passes through the high-pressure interface into the disinfection unit IV and connects to the plasma module. The other end of the high-pressure line is connected to the power distribution system 6. The gas path interface is connected to the gas distribution system 7, and the one-way valve is connected to the exhaust gas treatment system 15. The specific situation is basically the same as that of the disinfection unit I 2. The interior of the disinfection unit IV housing 505 has a roller bracket I 508, a pull-out unit 509, a mounting rail, a support frame 510, and a roller bracket II 511. The pull-out unit 509 is slidably connected to the mounting rail. The support frame 510 is located in the middle of the disinfection unit IV housing 505. The roller bracket I 508 is located at the left end of the disinfection unit IV housing 505. The roller bracket II 511 511 512 513 514 515 ... Unit 511 is located at the right end of the disinfection unit IV housing 505 and is connected to the disinfection unit IV housing 505 via studs. The disinfection unit IV door 504 is connected to the disinfection unit IV housing 505 via hinges, while the emergency handle 502 and door handle 503 are fixed to the door surface with screws. The pull-out unit 509 of disinfection unit IV 5 has the same structure as the pull-out unit 207 of disinfection unit I 2. In disinfection unit I 2, roller bracket I 206 has two rollers, while roller bracket II 209 and roller bracket III each have one roller 210. In disinfection units II 11 and III 9, roller bracket I has one roller. In disinfection unit IV 5, roller bracket I 508 has two rollers, and roller bracket II 511 has one roller. The opening and closing directions of the disinfection units IV 5, II 11, III 9 and I 2 are opposite.

[0088] The correction box I 3 includes a correction box I body 310 and a correction box I correction door 303, which are connected for opening and closing. The correction box I correction door 303 is provided with a door handle and an emergency handle. The interior of the correction box I housing 310 is equipped with a correction mechanism 302, roller support I 307, and roller support II 309. Roller support I 307 is located at the upper part of the correction box I housing 310 and is connected to the top of the correction box I housing 310. Roller support II 309 is located at the lower part of the correction box I housing 310 and is connected to the bottom of the correction box I housing 310. The correction mechanism 302 is located between roller support I 307 and roller support II 309 and is fixedly connected to the left side of the correction box I housing 310. The right side of the correction box I housing 310 is provided with connection port I 304 and connection port II 306. Connection port II 306 is located at connection port I. Below 304, the bottom of the correction box I body 310 is provided with a connection port III 308, and the top of the correction box I body 310 is provided with a connection flange 301. The connection port I 304 is connected to the disinfection unit II 11, the connection port II 306 is connected to the disinfection unit III 9, the connection port III 308 is connected to the disinfection unit IV, and the connection flange 301 is connected to the disinfection unit I 2. The correction door 303 of the correction box I is connected to the correction box I body 310 by a hinge, and the emergency handle 305 and the door handle are fixed to the door surface by screws.

[0089] The alignment box II 10 includes an alignment box II body 1007 and an alignment box II alignment door 1003, which are connected for opening and closing. The alignment box II alignment door 1003 is provided with a door handle and an emergency handle 1005. The interior of the correction box II housing 1007 is equipped with a correction mechanism 1002 and a roller bracket I 1004. The roller bracket I 1004 is located at the lower part of the correction box II housing 1007 and is fixedly connected to the bottom of the correction box II housing 1007. The correction mechanism is located at the upper part of the correction box II housing 1007, and the correction mechanism 1002 is fixedly connected to the left side of the correction box II housing 1007. The right side of the correction box II housing 1007 is provided with an equipment outlet 1006. The top of the correction box II housing 1007 is provided with a connecting flange 1001, which is connected to the disinfection unit I2. The correction door 1003 of the correction box II is connected to the correction box II housing 1007 via a hinge, and the emergency handle 1005 and the door handle are fixed to the door surface with screws. The opening and closing directions of the correction box I 3 and the correction box II 10 are opposite.

[0090] The power distribution system 6 includes an AC power supply. The gas source of the gas distribution system 7 includes nitric oxide and nitrogen dioxide as a mixed gas, which synergistically atomizes the peroxide. The gas distribution system 7 includes an atomizer, a nitric oxide and nitrogen dioxide mixed gas inlet, and a compressed air inlet. The compressed air inlet is connected to the gas path interface of the disinfection unit through the atomizer, and the nitric oxide and nitrogen dioxide mixed gas inlet is connected to the gas path interface of the disinfection unit. Nitric oxide and nitrogen dioxide as a mixed gas are introduced into the disinfection unit through the gas path interface, simultaneously atomizing the peroxide. Liquid peroxide and an ultrasonic atomizing plate are placed in the atomizer, and the atomized peroxide is introduced into the disinfection unit by applying compressed air to the atomizer.

[0091] The dimensions of the disinfection unit I 2 are 1700mm (length) × 350mm (width) × 190mm (height); the dimensions of the disinfection unit II 11 are 1200mm (length) × 350mm (width) × 160mm (height); the dimensions of the disinfection unit III 9 are 1200mm (length) × 350mm (width) × 160mm (height); and the dimensions of the disinfection unit IV 5 are 1900mm (length) × 350mm (width) × 160mm (height). The dimensions of the alignment box I 3 are 270mm (length) × 350mm (width) × 480mm (height); the dimensions of the alignment box II 10 are 270mm (length) × 350mm (width) × 480mm (height); and the dimensions of the atomizer are 170mm (diameter) × 150mm (height). All components of the device are made of 316 stainless steel, which has good corrosion resistance.

[0092] Food packaging materials enter the device through inlet 4 and proceed to sterilization unit IV 5. Within sterilization unit IV 5, they sequentially pass through roller support I 508, pull-out unit 509, roller support II 511, pull-out unit 509, and roller support I 508, then through connecting flange 507 into correction box I 3. Within correction box I 3, they pass through roller support I 307 and through connecting flange into sterilization unit III 9. Within sterilization unit III, they sequentially pass through pull-out unit, roller support I, and pull-out unit, then through connecting flange into correction box I 3. Within correction box I 3, they pass through roller support I 307, correction mechanism 302, and roller support II 309, then through connecting flange 901 into sterilization unit II 11. Within sterilization unit II 11, they sequentially pass through pull-out unit 906, roller support I 907, and pull-out unit 906, then through connecting flange 901 into correction box I 908. 3. Inside the correction box I 3, the device passes through roller bracket II 309 and enters the disinfection unit I 2 via connecting flange 1001. Inside the disinfection unit I 2, the device passes through roller bracket I 206, pull-out unit 207, roller bracket II 209, pull-out unit 207, roller bracket I 206, pull-out unit 207, and roller bracket III 210 in sequence before entering the correction box II 10. Inside the correction box II 10, the device passes through correction mechanism 1002 and roller bracket I 1004 in sequence before finally exiting from equipment outlet 1006.

[0093] The above-mentioned method for sterilizing food packaging using a mixed gas synergistic atomized peroxide plasma includes the following steps:

[0094] Before sterilization begins, the food packaging material (200mm wide) is inserted into the sterilization device through inlet 4, passing sequentially through sterilization unit IV 5, correction box I 3, sterilization unit III 9, correction box I 3, sterilization unit II 11, correction box I 3, sterilization unit I 2, and correction box II 10, finally exiting from equipment outlet 1006. During sterilization, the gas distribution system 7 and exhaust gas treatment system 15 are first opened, and a mixture of nitric oxide and nitrogen dioxide gas with a volume ratio of 1:1 is introduced. The total flow rate of the nitric oxide and nitrogen dioxide mixture is 150mL / min, and the concentration of hydrogen peroxide is 30%. The height of the liquid hydrogen peroxide is half the height of the atomizer. The total flow rate of compressed air is controlled at 150mL / min. The nitric oxide and nitrogen dioxide mixture and the atomized hydrogen peroxide are evenly distributed in the sterilization unit. After the gas flow stabilizes, the power distribution system 6 is activated, with a power frequency of 10kHz and a peak-to-peak voltage of 13kV. After being powered on, the plasma module starts working, and the internal fan starts working. The gas in the disinfection unit is driven by the internal airflow formed by the fan and is repeatedly activated by the plasma module to form a highly active and dense plasma. After 30 seconds, the bacteria on the surface of the packaging material inside the cavity are quickly disinfected.

[0095] Example 2

[0096] like Figures 1 to 9As shown, a device for sterilization of food packaging using mixed gas synergistic atomized peroxide plasma includes sterilization unit I 2, sterilization unit II 11, sterilization unit III 9, sterilization unit IV 5, correction box I 3, correction box II 10, exhaust gas treatment system 15, power distribution system 6, and gas distribution system 7. The sterilization unit IV, correction box I 3, sterilization unit III 9, correction box I 3, sterilization unit II, correction box I 10, sterilization unit I, and correction box II are connected in sequence. The sterilization unit I, sterilization unit II 11, sterilization unit III 9, and sterilization unit IV 5 are respectively connected to the gas distribution system 6 and the power distribution system 7. The sterilization unit IV 5 is provided with an equipment inlet 4, and the correction box II 10 is provided with an equipment outlet exhaust gas treatment system. The disinfection units I 2, II 11, III 9, and IV 5 are arranged sequentially from top to bottom (the disinfection unit II 11 is located directly below the disinfection unit I 2, the disinfection unit III 9 is located directly below the disinfection unit II 11, and the disinfection unit IV 5 is located directly below the disinfection unit III 9). The correction box I and correction box II are located on the left and right sides of the disinfection units II and III 9, respectively. The exhaust gas treatment system 15 is located behind the disinfection units II 11 and III 9. The power distribution system 6 and the gas distribution system 7 are located behind the correction box II, and the power distribution system 6 is located behind the gas distribution system 7. The disinfection unit I is provided with an upper plate I above it. The power distribution system 6 and the gas distribution system 7 are provided with an upper plate II 12, a side plate I8 and a rear panel I14 on the outside. The power distribution system 6 and the gas distribution system 7 are provided with an upper plate II 12 above them. The power distribution system 6 and the gas distribution system 7 are provided with a side plate I 8 on their sides. The power distribution system is provided with a rear panel I directly behind it. The exhaust gas treatment system is provided with a side plate II 17, a rear panel II 16 and a rear panel III 18 on the outside. The rear panel II 16 is located below the rear panel III 18. The upper plate II 12 is connected to the side plate I 8 and the rear panel I14. The side plate II 17 is connected to the rear panel II 16 and the rear panel III 18. The device also includes a bracket 19. The disinfection units I 2, II 11, III 9, IV 5, and correction boxes I 3 and II 10 are placed on the bracket 19 and fixed with screws. The bracket 19 serves as the support for the disinfection units. The upper plate I1 is located above the disinfection unit I 2 and is connected by screws. The disinfection units I 2, II 11, III, and IV are connected to each other via the connecting flanges of correction boxes I and II. The disinfection units II, III, and IV are connected to correction box I via their respective connecting flanges.The power distribution system 6 and the gas distribution system 7 are respectively provided with brackets for placing the power distribution system 6 and the gas distribution system 7. The power distribution system 6 is located directly behind the correction box II 10, and the gas distribution system 7 is located directly in front of the power distribution system 6. The bracket of the gas distribution system 7 is connected to the bracket of the disinfection unit IV 5 by screws. The upper plate II 12 is located above the power distribution system 7 and the gas distribution system 6, and is connected to the bracket 19 of the disinfection unit and the bracket of the power distribution system 7 by screws. The rear panel I 14 is located directly behind the power distribution system 6 and is connected to the bracket of the power distribution system 6 by screws. The exhaust gas treatment system 15 is located directly behind the disinfection unit II 11. At the same time, the rear panel III 18 has a through hole for the exhaust pipe 13 to pass through. The exhaust pipe 13 is directly connected to the exhaust gas treatment system 15. The rear panel III 18 is connected to the bracket 19 of the disinfection unit by screws. The rear panel II 16 is connected to the rear panel of the exhaust gas treatment system 15 by screws. The side plate II 17 is connected to the rear panel II 16 and the rear panel III 14 by threads. Connection 17: Side panel I 8 is connected to upper panel I1, disinfection unit bracket 17, and rear panel I14 via screws. Exhaust gas treatment system.

[0097] The disinfection unit I 2 includes a disinfection unit I housing 205 and a disinfection unit I door 203, which are connected for opening and closing; the disinfection unit I housing 205 and the disinfection unit I door 203 are provided with a door handle and an emergency handle. The bottom of the disinfection unit I housing 205 has connection ports I 214 and II 215 at its left and right ends. Connection port I 214 is located at the left end of the disinfection unit I housing 205, and connection port II 215 is located at the right end of the disinfection unit I housing 205. Connection port I 214 is connected to the correction box I 3, and connection port II 215 is connected to the correction box II 10. Inside the disinfection unit I housing 205, there are roller brackets I 206, a pull-out unit 207, a mounting rail, a support frame 208, roller brackets II 209, and roller brackets III 210. The pull-out unit 207 is slidably connected to the mounting rail 208, and the pull-out unit 207 can slide along the rail to achieve rapid pull-out. Roller bracket I 206 is located on the left side inside the disinfection unit I housing 205 and is connected to the disinfection unit I housing 205 by studs. Roller brackets II 214 and II 215 are connected to the disinfection unit I housing 205 by studs. 209 and roller bracket III 210 are located inside the right side of the disinfection unit I housing 205, and are connected to the disinfection unit I housing 205 by studs; support frame 208 is located in the middle inside the disinfection unit I housing 205 to improve structural stability. A 230mm long and 2.5mm wide elongated hole is opened on the right side of the disinfection unit I housing 205. Exhaust gas collector 204 is connected to the right side of the disinfection unit I housing 205 by screws to balance air pressure and collect equipment exhaust gas. Exhaust gas collector 204 is connected to exhaust gas treatment system 15. The disinfection unit I housing door 203 is connected to the disinfection unit I housing 205 by hinges, while the emergency handle 201 and door handle 202 are fixed to the door surface by screws.

[0098] The pull-out unit 207 includes a pull-out unit housing 207a. Inside the pull-out unit housing are a fan frame I 207b, a support plate 207c, a plasma module 207d, a fan frame II 207e, a fan 207f, and a limiting frame 207g. Fan frames I 207b and II 207e are located on the upper and lower sides of the pull-out unit housing 207a, respectively, and are placed diagonally. The fan 207f is housed inside the fan frames I and II, and the air outlet angle of the fan frames is adjustable to 15 degrees. The plasma module 207d is placed in front of the fan frame I 207e and connected to the lower side of the pull-out unit housing 207a by screws. The limiting bracket 207g is located inside the pull-out unit housing 207a and is connected to the pull-out unit housing 207a by countersunk screws. The support rod on the limiting bracket 207g is a hollow stainless steel round rod with a diameter of 10mm, used to protect the plasma module 207d. The support plate 207c is welded to the lower side of the quick-extraction unit housing 207a and is connected to the support rod of the limiting bracket 207g by screws to enhance the stability of the limiting bracket.

[0099] The back panel of the disinfection unit I housing 205 is equipped with a high-pressure interface 211, a gas path interface 212, and a one-way valve. The high-pressure interface 211 has a 23mm through-hole in the disinfection unit I housing 205, corresponding to the number of plasma modules. A high-pressure wire passes through the high-pressure interface 211 into the disinfection unit I and connects to the plasma module 207d. The other end of the high-pressure wire connects to the power distribution system 6. The gas path interface 212 connects to the gas distribution system 7 and is used to introduce a mixture of nitric oxide and nitrogen dioxide into the equipment, along with atomized hydrogen peroxide. The gas path interface 212 is a 16mm outer diameter, 14mm inner diameter bent pipe, with the bend facing the fan frame 207e. The one-way valve 213 provides an exhaust gas interface. The one-way valve 213 interface uses a standard KF25 flange and connects to the exhaust gas treatment system 15 via a pipeline.

[0100] The internal structure of disinfection unit II 11, disinfection unit III 9 and disinfection unit IV 5 is basically the same as that of disinfection unit I. Disinfection unit II 11 and disinfection unit III 9 are provided with a connecting flange 901 on the left side for connecting to the interface on the right side of the correction box I 3. Specifically, the disinfection unit II 11 includes a disinfection unit II housing 903 and a disinfection unit II door 902, which are connected for opening and closing. The disinfection unit II door 902 is equipped with a door handle 908 and an emergency handle 905. A connecting flange 901 is provided on the left side of the disinfection unit II housing, which is connected to the correction box I 3. The back panel of the disinfection unit II housing 903 is equipped with a high-pressure interface, a gas path interface, and a one-way valve 904. The high-pressure line passes through the high-pressure interface into the disinfection unit II and is connected to the plasma module. The other end of the high-pressure line is connected to the power distribution system 6. The gas path interface is connected to the gas distribution system 7. The one-way valve 904 is connected to the exhaust gas treatment system 15. The specific details are basically the same as those of the disinfection unit I2. The interior of the disinfection unit II housing 903 is equipped with a roller support I. 907, a pull-out unit 906, and a mounting rail; the pull-out unit 906 is slidably connected to the mounting rail. The roller bracket I 907 is located on the right side of the disinfection unit II housing 903 and is connected to the disinfection unit II housing 903 by studs. The disinfection unit II door 902 is connected to the disinfection unit II housing 903 by hinges, and the emergency handle 905 and door handle 908 are fixed to the door surface by screws. The structure of the pull-out unit 906 of the disinfection unit II 11 is the same as that of the pull-out unit 207 of the disinfection unit I 2. The disinfection unit III has the same structure as the disinfection unit II. The disinfection unit IV 5 includes a disinfection unit IV housing 505 and a disinfection unit IV door 504, which are connected for opening and closing. The disinfection unit IV door is equipped with a door handle and an emergency handle.The disinfection unit IV housing 505 has an equipment inlet 4 and a connecting flange 507 on its left side. The connecting flange 507 is located above the equipment inlet 4 and is connected to the correction box I 3. The back plate of the disinfection unit IV housing 505 has a high-pressure interface, a gas path interface, and a one-way valve. The high-pressure line passes through the high-pressure interface into the disinfection unit IV and connects to the plasma module. The other end of the high-pressure line is connected to the power distribution system 6. The gas path interface is connected to the gas distribution system 7, and the one-way valve is connected to the exhaust gas treatment system 15. The specific situation is basically the same as that of the disinfection unit I 2. The interior of the disinfection unit IV housing 505 has a roller bracket I 508, a pull-out unit 509, a mounting rail, a support frame 510, and a roller bracket II 511. The pull-out unit 509 is slidably connected to the mounting rail. The support frame 510 is located in the middle of the disinfection unit IV housing 505. The roller bracket I 508 is located at the left end of the disinfection unit IV housing 505. The roller bracket II 511 511 512 513 514 515 ... Unit 511 is located at the right end of the disinfection unit IV housing 505 and is connected to the disinfection unit IV housing 505 via studs. The disinfection unit IV door 504 is connected to the disinfection unit IV housing 505 via hinges, while the emergency handle 502 and door handle 503 are fixed to the door surface with screws. The pull-out unit 509 of disinfection unit IV 5 has the same structure as the pull-out unit 207 of disinfection unit I 2. In disinfection unit I 2, roller bracket I 206 has two rollers, while roller bracket II 209 and roller bracket III each have one roller 210. In disinfection units II 11 and III 9, roller bracket I has one roller. In disinfection unit IV 5, roller bracket I 508 has two rollers, and roller bracket II 511 has one roller. The opening and closing directions of the disinfection units IV 5, II 11, III 9 and I 2 are opposite.

[0101] The correction box I 3 includes a correction box I body 310 and a correction box I correction door 303, which are connected for opening and closing. The correction box I correction door 303 is provided with a door handle and an emergency handle. The interior of the correction box I housing 310 is equipped with a correction mechanism 302, roller support I 307, and roller support II 309. Roller support I 307 is located at the upper part of the correction box I housing 310 and is connected to the top of the correction box I housing 310. Roller support II 309 is located at the lower part of the correction box I housing 310 and is connected to the bottom of the correction box I housing 310. The correction mechanism 302 is located between roller support I 307 and roller support II 309 and is fixedly connected to the left side of the correction box I housing 310. The right side of the correction box I housing 310 is provided with connection port I 304 and connection port II 306. Connection port II 306 is located at connection port I. Below 304, the bottom of the correction box I body 310 is provided with a connection port III 308, and the top of the correction box I body 310 is provided with a connection flange 301. The connection port I 304 is connected to the disinfection unit II 11, the connection port II 306 is connected to the disinfection unit III 9, the connection port III 308 is connected to the disinfection unit IV, and the connection flange 301 is connected to the disinfection unit I 2. The correction door 303 of the correction box I is connected to the correction box I body 310 by a hinge, and the emergency handle 305 and the door handle are fixed to the door surface by screws.

[0102] The alignment box II 10 includes an alignment box II body 1007 and an alignment box II alignment door 1003, which are connected for opening and closing. The alignment box II alignment door 1003 is provided with a door handle and an emergency handle 1005. The interior of the correction box II housing 1007 is equipped with a correction mechanism 1002 and a roller bracket I 1004. The roller bracket I 1004 is located at the lower part of the correction box II housing 1007 and is fixedly connected to the bottom of the correction box II housing 1007. The correction mechanism is located at the upper part of the correction box II housing 1007, and the correction mechanism 1002 is fixedly connected to the left side of the correction box II housing 1007. The right side of the correction box II housing 1007 is provided with an equipment outlet 1006. The top of the correction box II housing 1007 is provided with a connecting flange 1001, which is connected to the disinfection unit I2. The correction door 1003 of the correction box II is connected to the correction box II housing 1007 via a hinge, and the emergency handle 1005 and the door handle are fixed to the door surface with screws. The opening and closing directions of the correction box I 3 and the correction box II 10 are opposite.

[0103] The power distribution system 6 includes an AC power supply. The gas source of the gas distribution system 7 includes nitric oxide and nitrogen dioxide as a mixed gas, which synergistically atomizes the peroxide. The gas distribution system 7 includes an atomizer, a nitric oxide and nitrogen dioxide mixed gas inlet, and a compressed air inlet. The compressed air inlet is connected to the gas path interface of the disinfection unit through the atomizer, and the nitric oxide and nitrogen dioxide mixed gas inlet is connected to the gas path interface of the disinfection unit. Nitric oxide and nitrogen dioxide as a mixed gas are introduced into the disinfection unit through the gas path interface, simultaneously atomizing the peroxide. Liquid peroxide and an ultrasonic atomizing plate are placed in the atomizer, and the atomized peroxide is introduced into the disinfection unit by applying compressed air to the atomizer.

[0104] The dimensions of the disinfection unit I 2 are 1700mm (length) × 350mm (width) × 190mm (height); the dimensions of the disinfection unit II 11 are 1200mm (length) × 350mm (width) × 160mm (height); the dimensions of the disinfection unit III 9 are 1200mm (length) × 350mm (width) × 160mm (height); and the dimensions of the disinfection unit IV 5 are 1900mm (length) × 350mm (width) × 160mm (height). The dimensions of the alignment box I 3 are 270mm (length) × 350mm (width) × 480mm (height); the dimensions of the alignment box II 10 are 270mm (length) × 350mm (width) × 480mm (height); and the dimensions of the atomizer are 170mm (diameter) × 150mm (height). All components of the device are made of 304 stainless steel with good corrosion resistance.

[0105] Food packaging materials enter the device through inlet 4 and proceed to sterilization unit IV 5. Within sterilization unit IV 5, they sequentially pass through roller support I 508, pull-out unit 509, roller support II 511, pull-out unit 509, and roller support I 508, then through connecting flange 507 into correction box I 3. Within correction box I 3, they pass through roller support I 307 and through connecting flange into sterilization unit III 9. Within sterilization unit III, they sequentially pass through pull-out unit, roller support I, and pull-out unit, then through connecting flange into correction box I 3. Within correction box I 3, they pass through roller support I 307, correction mechanism 302, and roller support II 309, then through connecting flange 901 into sterilization unit II 11. Within sterilization unit II 11, they sequentially pass through pull-out unit 906, roller support I 907, and pull-out unit 906, then through connecting flange 901 into correction box I 908. 3. Inside the correction box I 3, the device passes through roller bracket II 309 and enters the disinfection unit I 2 via connecting flange 1001. Inside the disinfection unit I 2, the device passes through roller bracket I 206, pull-out unit 207, roller bracket II 209, pull-out unit 207, roller bracket I 206, pull-out unit 207, and roller bracket III 210 in sequence before entering the correction box II 10. Inside the correction box II 10, the device passes through correction mechanism 1002 and roller bracket I 1004 in sequence before finally exiting from equipment outlet 1006.

[0106] The above-mentioned method for sterilizing food packaging using a mixed gas synergistic atomized peroxide plasma includes the following steps:

[0107] Before sterilization begins, the food packaging material (200mm wide) is inserted into the sterilization device through inlet 4, passing sequentially through sterilization unit IV 5, correction box I 3, sterilization unit III 9, correction box I 3, sterilization unit II 11, correction box I 3, sterilization unit I 2, and correction box II 10, finally exiting from equipment outlet 1006. During sterilization, the gas distribution system 7 and exhaust gas treatment system 15 are first opened, and a mixture of nitric oxide and nitrogen dioxide gas with a volume ratio of 1:1 is introduced. The total flow rate of the nitric oxide and nitrogen dioxide gas mixture is 150mL / min. The concentration of peracetic acid used is 30%, and the height of the liquid peracetic acid is half the height of the atomizer. The total flow rate of compressed air is controlled at 150mL / min. The nitric oxide and nitrogen dioxide gas mixture and the atomized peracetic acid are evenly distributed in the sterilization unit. After the gas flow stabilizes, the power distribution system 6 is powered on, with a power frequency of 15kHz and a peak-to-peak voltage of 10kV. After being powered on, the plasma module starts working, and the internal fan starts working. The gas in the disinfection unit is driven by the internal airflow formed by the fan and is circulated and activated by the plasma module to form a highly active and dense plasma. After 30 seconds, the bacteria on the surface of the packaging material inside the cavity are quickly disinfected.

Claims

1. A device for sterilizing food packaging using a mixed gas synergistic atomized peroxide plasma, characterized in that, It includes disinfection unit I, disinfection unit II, disinfection unit III, disinfection unit IV, correction box I, correction box II, exhaust gas treatment system, power distribution system, and gas distribution system. The disinfection unit IV, correction box I, disinfection unit III, correction box I, disinfection unit II, correction box I, disinfection unit I, and correction box II are connected in sequence. The disinfection unit I, disinfection unit II, disinfection unit III, and disinfection unit IV are respectively connected to the gas distribution system and the power distribution system. The disinfection unit IV has an equipment inlet, and the correction box II has an equipment outlet. The disinfection unit I, disinfection unit II, disinfection unit III, and disinfection unit IV are arranged sequentially from top to bottom. The correction box I and correction box II are located on the left and right sides of disinfection unit II and disinfection unit III, respectively. The exhaust gas treatment system is located behind disinfection unit II and disinfection unit III. The power distribution system and the gas distribution system are located behind correction box II and the power distribution system is located behind the gas distribution system. The disinfection unit I includes a disinfection unit I housing and a disinfection unit I door, which are connected for opening and closing. The bottom of the disinfection unit I housing has connection ports I and II at both ends. Connection port I connects to the correction box I, and connection port II connects to the correction box II. The back panel of the disinfection unit I housing has a high-pressure interface, a gas interface, and a one-way valve. The high-pressure interface connects to the power distribution system, the gas interface connects to the gas distribution system, and the one-way valve connects to the exhaust gas treatment system. The interior of the disinfection unit I housing includes a roller bracket I, a pull-out unit, a mounting rail, a support frame, a roller bracket II, and a roller bracket III. The pull-out unit connects to the mounting rail... The guide rail is slidably connected. The support frame is located in the middle of the disinfection unit I housing. Roller bracket I, roller bracket II, and roller bracket III are located at both ends of the disinfection unit I housing. Roller bracket I is close to connection port I, and roller bracket II and roller bracket III are close to connection port II. Roller bracket I and roller bracket II are connected to the bottom of the disinfection unit I housing, and roller bracket III is connected to the top of the disinfection unit I housing. An exhaust gas collector is provided on one side of the disinfection unit I housing, and the exhaust gas collector is connected to the exhaust gas treatment system. The disinfection unit II includes a disinfection unit II housing and a disinfection unit II door, which are connected for opening and closing. The disinfection unit II housing has a connecting flange on one side, which is connected to the correction box I. The back panel of the disinfection unit II housing has a high-pressure interface, a gas interface, and a one-way valve. The high-pressure interface is connected to the power distribution system, the gas interface is connected to the gas distribution system, and the one-way valve is connected to the exhaust gas treatment system. The interior of the disinfection unit II housing has a roller bracket I, a pull-out unit, and a mounting rail. The pull-out unit is slidably connected to the mounting rail. The roller bracket I is located away from the connecting flange and is connected to the bottom of the disinfection unit II housing. The disinfection unit III has the same structure as the disinfection unit II; The disinfection unit IV includes a disinfection unit IV housing and a disinfection unit IV door, which are connected for opening and closing. The disinfection unit IV housing has an equipment inlet and a connecting flange at one end. The connecting flange is located above the equipment inlet and is connected to the correction box I. The back panel of the disinfection unit IV housing has a high-pressure interface, a gas interface, and a one-way valve. The high-pressure interface is connected to the power distribution system, the gas interface is connected to the gas distribution system, and the one-way valve is connected to the exhaust gas treatment system. The interior of the disinfection unit IV housing includes a roller bracket I, a pull-out unit, a mounting rail, a support frame, and a roller bracket II. The pull-out unit is slidably connected to the mounting rail. The support frame is located in the middle of the housing. The roller brackets I and II are located at both ends of the housing. The roller bracket I is closer to the equipment inlet, and the roller bracket II is farther from the equipment inlet. The roller brackets I and II are connected to the bottom of the disinfection unit IV housing. The gas distribution system includes an atomizer, a nitric oxide and nitrogen dioxide mixed gas inlet, and a compressed air inlet. The compressed air inlet is connected to the gas path interface of the disinfection unit through the atomizer, and the nitric oxide and nitrogen dioxide mixed gas inlet is connected to the gas path interface of the disinfection unit.

2. The apparatus according to claim 1, characterized in that, The disinfection unit I door is equipped with a door handle and an emergency handle; The disinfection unit II box door is equipped with a door handle and an emergency handle; The disinfection unit IV box door is equipped with a door handle and an emergency handle.

3. The apparatus according to claim 1, characterized in that, The pull-out unit includes a pull-out unit housing. Inside the pull-out unit housing are a fan frame I, a support plate, a plasma module, a fan frame II, a limiting frame, and a fan. The fan frame I and fan frame II are located at the upper and lower parts of the pull-out unit housing, respectively, and are placed diagonally. A fan is placed inside the fan frame I and fan frame II. The plasma module is located in front of the fan frame II and is connected to the bottom of the pull-out unit housing. The limiting frame is located in the middle of the pull-out unit housing. One end of the limiting frame is connected to the pull-out unit housing, and the other end of the limiting frame is connected to the top of the support plate. The bottom of the support plate is connected to the pull-out unit housing.

4. The apparatus according to claim 1, characterized in that, The correction box I includes a correction box I body and a correction box I correction door, and the correction box I body and the correction box I correction door are connected for opening and closing. The interior of the correction box I is equipped with a correction mechanism, roller support I, and roller support II. Roller support I is located at the top of the correction box I and is connected to the top of the correction box I. Roller support II is located at the bottom of the correction box I and is connected to the bottom of the correction box I. The correction mechanism is located between roller support I and roller support II and is connected to one side of the correction box I. The other side of the correction box I is provided with connection port I and connection port II. Connection port II is located below connection port I. Connection port III is provided at the bottom of the correction box I. Connection flange is provided at the top of the correction box I. Connection port I is connected to disinfection unit II. Connection port II is connected to disinfection unit III. Connection port III is connected to disinfection unit IV. Connection flange is connected to disinfection unit I. The door of the correction box I is equipped with a door handle and an emergency handle; The correction box II includes a correction box II housing and a correction box II door, and the correction box II housing and the correction box II door are connected for opening and closing; The interior of the correction box II is equipped with a correction mechanism and a roller support I. The roller support I is located at the lower part of the correction box II and is connected to the bottom of the correction box II. The correction mechanism is located at the upper part of the correction box II and is connected to one side of the correction box II. The other side of the correction box II is equipped with an equipment outlet. The top of the correction box II is equipped with a connecting flange, which is connected to the disinfection unit I. The door of the correction box II is equipped with a door handle and an emergency handle.

5. The apparatus according to claim 1, characterized in that, The pull-out units are multiple and are arranged in parallel or in an array within the sterilization unit; The opening and closing directions of disinfection unit IV, disinfection unit II, and disinfection unit III are opposite to those of disinfection unit I; The opening and closing directions of the correction box I and the correction box II are opposite; The exhaust gas treatment system is connected to the exhaust pipe; The device also includes a support frame, on which the disinfection unit I, disinfection unit II, disinfection unit III, disinfection unit IV, correction box I, and correction box II are placed; The disinfection unit I is provided with an upper plate I above it. The power distribution system and the gas distribution system are provided with an upper plate II, a side plate I and a rear plate I on the outside. The power distribution system and the gas distribution system are provided with an upper plate II above them. The power distribution system and the gas distribution system are provided with a side plate I on their sides. The power distribution system is provided with a rear plate I directly behind it. The exhaust gas treatment system is provided with a side plate II, a rear plate II and a rear plate III on the outside. The rear plate II is located below the rear plate III. The upper plate II is connected to the side plate I and the rear plate I. The side plate II is connected to the rear plate II and the rear plate III.

6. The apparatus according to claim 1, characterized in that, The power distribution system includes a power source, which is an AC power source with a peak voltage adjustment range of 0-20kV and a frequency adjustment range of 1-50kHz, or a pulse power source with a peak voltage adjustment range of 0-20kV and a frequency adjustment range of 1-30kHz.

7. The apparatus according to claim 1, characterized in that, The gas source of the gas distribution system includes nitric oxide and nitrogen dioxide as a mixed gas, which synergistically atomizes peroxide.

8. The apparatus according to claim 1 or 7, characterized in that, The volume ratio of nitric oxide to nitrogen dioxide is 1:

1. The total gas flow rate after mixing nitric oxide and nitrogen dioxide is controlled at 100 mL / min-150 mL / min, and the peroxide concentration is controlled between 30% and 35%. The peroxide is hydrogen peroxide or peracetic acid.

9. A method for sterilizing food packaging materials using the mixed gas synergistic atomized peroxide plasma sterilization device for food packaging as described in any one of claims 1-8, characterized in that, Includes the following steps: Packaging materials are inserted into the device through the equipment inlet, and then pass through the disinfection unit IV, the correction box I, the disinfection unit III, the correction box I, the disinfection unit II, the correction box I, the disinfection unit I, and the correction box II in sequence, finally exiting from the equipment outlet. During disinfection, the gas in the disinfection unit is driven by the internal airflow formed by the fan, and is repeatedly activated by the plasma module to form plasma, thereby achieving the disinfection of bacteria on the surface of the packaging materials inside the device.

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