Cargo sterilization device and sterilization method

Abstract

The present application relates to disinfection and sterilization technical field, specifically to a kind of goods disinfection and sterilization device and disinfection and sterilization method, including disinfection and sterilization chamber, degradation chamber and conveying belt, several oxidation dry fog disinfection modules are arranged in the disinfection and sterilization chamber, degradation module is arranged in the degradation chamber, the conveying belt passes through disinfection and sterilization chamber and degradation chamber and transports goods;The oxidation dry fog disinfection module generates ozone and hydroxyl radical mixed dry fog in disinfection and sterilization chamber, and the degradation module is used for degrading ozone in degradation chamber.The purpose is to convert most of gaseous active substance ozone into gas-liquid mixed dry fog containing active oxygen and hydroxyl radical, disinfect and sterilize goods using dry fog, to achieve the purpose of preventing epidemic disease spread;While adding photoelectric coupling degradation module in the device, combined with photoelectric coupling unit, excessive ozone generated with dry fog is completely degraded, and ozone leakage risk is completely ruled out.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of disinfection and sterilization, and particularly relates to a goods disinfection and sterilization device and a disinfection and sterilization method. BACKGROUND

[0002] Under the condition of low temperature, part of bacteria and viruses are easy to adhere to goods, especially on the surface of cold chain goods, and can survive for a long time, increasing the risk of secondary transmission. In daily life, there are also a large number of epidemic diseases caused by freight transportation and personnel luggage flow, and the society urgently needs related solutions and equipment.

[0003] Ozone is unstable in molecular structure at normal temperature and pressure, and quickly decomposes into oxygen (O2) and single oxygen atom (O) by itself. The latter has strong activity and strong oxidation ability, and can directly act on bacteria, viruses and volatile organic gases, playing a role in sterilization and air purification. In practical application, pure ozone disinfection may cause ozone leakage risk. If the equipment is not properly controlled, disinfection and purification may also damage the human body and cause health hazards.

[0004] The hydroxyl radical (·OH) generated in the process of dissolving ozone in water is used to enhance the disinfection and sterilization effect of ozone water. The oxidation potential of hydroxyl radical (·OH) is 2.80eV, only next to fluorine (2.87eV), and has strong oxidizing property. It can have a rapid chain reaction with most organic pollutants, and can non-selectively mineralize harmful substances into CO2, H2O or inorganic salts without secondary pollution. These advanced oxidation properties of hydroxyl radical (·OH) enable it to be applied in the treatment of organic pollutants and have the characteristics of broad spectrum, rapid, stable and reliable.

[0005] At present, there is no device and method for mixing ozone and hydroxyl radical into disinfection dry fog for cold chain, logistics and goods disinfection. The traditional disinfection method uses pure chemical agent spraying disinfection, which cannot effectively remove biological pollution. Not only will it produce secondary pollution residues, but also the chemical disinfectant has strong odor and is harmful to the body, especially for food goods disinfection. SUMMARY

[0006] In order to solve the problem that bacteria and germs exist on the transported goods, especially for cold chain goods, there is no effective equipment to quickly disinfect and sterilize them, the application provides a goods disinfection and sterilization device and a disinfection and sterilization method. The device can disinfect and sterilize goods by mixing ozone and hydroxyl radical dry fog while transporting goods, and degrade the generated ozone after disinfection and sterilization, so that the ozone will not overflow outside the device, solving the problems of secondary pollution and chemical residues in ordinary disinfection and sterilization methods.

[0007] The technical scheme adopted by the application is:

[0008] A cargo disinfection device includes a disinfection chamber, a degradation chamber, and a conveyor belt. The disinfection chamber is equipped with several oxidative dry fog disinfection modules, and the degradation chamber is equipped with a degradation module. The conveyor belt transports cargo through the disinfection chamber and the degradation chamber. The oxidative dry fog disinfection modules generate a mixed dry fog of ozone and hydroxyl radicals in the disinfection chamber, and the degradation modules degrade the ozone in the degradation chamber.

[0009] Preferably, the oxidative dry fog disinfection module includes an ozone generator and a hydroxyl radical generator, and several of the oxidative dry fog disinfection modules are arranged above the conveyor belt. The disinfection chamber and the degradation chamber are separated from each other to form a separate closed chamber.

[0010] Preferably, the degradation module includes several first degradation catalyst plates, each first degradation catalyst plate corresponding to a UV lamp tube, and the several first degradation catalyst plates are arranged alternately to form an S-shaped channel; the degradation module is set above the conveyor belt, and is connected to the disinfection chamber through the degradation chamber intake fan, and the air outlet of the degradation module is connected to the degradation chamber through the first outlet fan.

[0011] Preferably, the degradation module further includes several negative ion generators, which are evenly distributed within an S-shaped channel formed by several degradation catalyst plates arranged in an alternating pattern.

[0012] Preferably, a heated degradation chamber is provided in the degradation chamber below the conveyor belt, and several far-infrared heaters are arranged in an alternating manner in the heated degradation chamber, each far-infrared heater corresponding to a second degradation catalyst plate; the outlet of the heated degradation chamber is connected to the disinfection chamber through a second outlet fan.

[0013] Preferably, a second disinfection chamber is provided inside the disinfection chamber and below the conveyor belt. The second disinfection chamber is provided with several oxidative dry fog disinfection modules. The heating degradation chamber is connected to the second disinfection chamber, and the outlet of the second disinfection chamber is connected to the disinfection chamber.

[0014] Preferably, a first movable plate that can be pushed open is provided on the disinfection device at the entrance of the conveyor belt, a second movable plate that can be pushed open is provided at the exit of the conveyor belt, and a third movable plate that can be pushed open is provided between the disinfection chamber and the degradation chamber.

[0015] A method for disinfecting goods includes the following steps:

[0016] 1) Goods enter through the inlet of the disinfection device, pass through the disinfection chamber, and are thoroughly disinfected in the disinfection chamber by a mixture of ozone and hydroxyl radicals in dry fog;

[0017] 2) The goods enter the degradation chamber, where the ozone overflowing from the disinfection chamber is degraded. During the degradation process, a small amount of hydroxyl radicals are generated, which perform secondary disinfection on the goods.

[0018] 3) After undergoing secondary disinfection, the goods are transported out of the unit's outlet, where the ozone content is below 0.16 mg / m³. 3 .

[0019] Preferably, the mixed dry fog of ozone and hydroxyl radicals generated in step 1) is used partly for disinfection of the goods and partly enters the degradation module in the degradation chamber. After degradation by the degradation module, oxygen molecules, water, and a small amount of hydroxyl radicals are generated. The degraded dry fog then enters the heated degradation chamber below the goods through the goods for heated degradation.

[0020] Preferably, the dried fog after heating and degradation re-enters the disinfection chamber to continue participating in disinfection, forming a circulating disinfection fog inside the device.

[0021] The advantages of this invention are:

[0022] 1) This invention converts most of the gaseous active substance ozone into a gas-liquid mixture dry fog containing active oxygen and hydroxyl radicals. The dry fog is then used to disinfect and sterilize goods, thereby preventing the spread of diseases. At the same time, a photoelectric coupling degradation module is added inside the device. Combined with the photoelectric coupling unit, the excess ozone generated with the dry fog is completely degraded, eliminating the risk of ozone leakage and improving the overall safety of the equipment. While achieving ozone emission standards, the gas inside the machine is also disinfected for the second time, ultimately achieving thorough disinfection of goods without producing secondary pollution or chemical residues.

[0023] 2) Photocoupling is a technology based on the synergistic effect of photocatalysis and negative oxygen ion generator. It uses high voltage electrostatics and special wavelength light waves to excite the catalyst, adsorb relevant reaction atoms, and promote the acceleration of chemical reactions. This technology can generate a high concentration of active free radical particles, which act on chemical atoms or biological macromolecules, promote the opening of molecular bonds and cause the denaturation and inactivation of biological macromolecules, thereby achieving rapid degradation and disinfection and sterilization.

[0024] 3) Equipment using ozone and hydroxyl radical mixed dry fog disinfection and photoelectric coupling technology fundamentally solves the problem of chemical residues; the reactive intermediates are ultimately degraded into oxygen, water, and other substances that already exist in the natural environment, which are non-toxic and harmless, ensuring both disinfection effectiveness and safety; moreover, the ozone degradation effect is excellent, with the ozone content at the device outlet below 0.16 mg / m³. 3 It meets emission standards.

[0025] 4) The device of this invention leaves no residual liquid and can control the particles of the disinfectant mist to a diameter of <5μm, thereby making the sprayed disinfectant mist form a white dry fog. When the human hand comes into contact with it, there is no dampness, achieving waterless disinfection. This prevents water droplets from forming on the surface of items during disinfection and sterilization, thus affecting the use of the items. It is especially suitable for the disinfection of cold chain foods, fruits and vegetables. The dry fog will not form water droplets on the surface of the food, thereby extending the shelf life of the food and preventing food spoilage due to water droplet condensation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] In the diagram: 1-Degradation chamber, 2-Ultraviolet lamp, 3-Negative ion generator, 4-First outlet fan, 5-Second movable plate, 6-Conveyor belt, 7-Heater, 8-Heated degradation chamber, 9-Second degradation catalyst plate, 10-Degradation chamber intake fan, 11-First degradation catalyst plate, 12-Disinfection chamber, 13-Oxidation dry fog disinfection module, 14-Nozzle, 15-Goods, 16-First movable plate; 17-Third movable plate; 18-Second outlet fan. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] This invention is applicable to the disinfection of bacteria and viruses in general cargo transportation, and also applicable to cold chain goods, especially food.

[0030] Ozone's molecular structure is unstable at room temperature and pressure, quickly decomposing into oxygen and individual oxygen atoms. Individual oxygen atoms are highly reactive and possess strong oxidizing power, directly acting on bacteria, viruses, and volatile organic gases to achieve sterilization and disinfection. It is a green disinfectant. The hydroxyl radicals generated during the "dissolution" of ozone in water enhance the sterilization effect of ozone water. The oxidation potential of hydroxyl radicals is 2.80 eV, second only to fluorine's 2.87 eV, exhibiting extremely strong oxidizing properties. Water vapor can generate hydroxyl radicals under the synergistic effect of ultraviolet lamps and photocatalytic meshes. Therefore, this invention uses ozone, photocatalytic mesh plates, and ultraviolet lamps to form a disinfection system that does not require the addition of disinfectants or bactericides. This disinfection system has advantages such as being environmentally friendly and leaving no chemical residues.

[0031] like Figure 1This is a structural diagram of a cargo disinfection device, including a disinfection chamber 12, a degradation chamber 1, and a conveyor belt 6. The disinfection chamber 12 is equipped with several oxidative dry fog disinfection modules 13, and the degradation chamber 1 is equipped with a degradation module. The conveyor belt 6 transports cargo through the disinfection chamber 12 and the degradation chamber 1. The disinfection chamber 12 and the degradation chamber 1 are separated from each other to form individual closed cavities. The oxidative dry fog disinfection modules 13 generate a mixed dry fog of ozone and hydroxyl radicals, and the degradation modules are used to degrade the ozone. Understandably, after the goods 15 enter the device through the entrance, they first enter the disinfection chamber 12. At this time, the disinfection chamber 12 generates disinfection dry fog from the oxidation dry fog disinfection module 13 to disinfect the goods once. The disinfection dry fog is mainly composed of a mixture of ozone and hydroxyl radicals. The goods continue to be transported to the degradation chamber 1. During the transportation process, some ozone in the disinfection chamber 12 will enter the degradation chamber 1 through the connection between the disinfection chamber 12 and the degradation chamber 1. In order to degrade the ozone inside the device and prevent it from overflowing outside the device and causing secondary pollution, a degradation module is set in the degradation chamber 1 to degrade the overflowing ozone. During the ozone degradation process, a small amount of hydroxyl radicals will be generated. The small amount of hydroxyl radicals can perform secondary disinfection on the goods 15.

[0032] The oxidative dry fog disinfection module 13 includes an ozone generator and a hydroxyl radical generator, and several of these modules are positioned above the conveyor belt 6. The oxidative dry fog disinfection module 13 primarily works by first dissolving ozone in water to form ozone water, and then ultrasonically atomizing it into ozone dry fog. During the ozone decomposition process, hydroxyl radicals are formed. Alternatively, a 185nm ultraviolet lamp can be added for irradiation to stimulate the generation of hydroxyl radicals.

[0033] The degradation module includes several first degradation catalyst plates 11, each corresponding to a UV lamp 2. The UV lamp 2 is a 254nm single-band UV lamp. The several first degradation catalyst plates 11 are arranged alternately to form an S-shaped channel. The degradation module is located above the conveyor belt 6. The outlet of the degradation module is connected to the degradation chamber 1 through a first outlet fan 4. The degradation module is connected to the disinfection chamber 12 through a degradation chamber inlet fan 10. A portion (50%) of the disinfection dry fog generated in the disinfection chamber 12 is used to disinfect the goods 15; the remaining portion (50%) enters the degradation module through the degradation chamber inlet fan 10 and passes through the S-shaped channel formed by the first degradation catalyst plates 11, further increasing the travel distance of the dry fog and ensuring complete ozone degradation. The degraded ozone-dry fog is blown into the degradation chamber 1 through the first outlet fan 4, contacting the transported goods. A small amount of hydroxyl radicals generated during degradation can perform secondary disinfection on the goods. The first outlet fan 4 blows air from top to bottom. Figure 1 (as shown in the direction), blowing towards the direction of the goods.

[0034] A further refinement involves including several negative ion generators 3 within the degradation module. These generators are evenly distributed within an S-shaped channel formed by a staggered arrangement of several degradation catalyst plates 11. The negative ion generators 3 are used for high-voltage discharge to generate oxygen ions. Through high-voltage discharge and the activation of the catalyst by the ultraviolet lamp 2, the synergistic effect accelerates the chemical reaction and increases the rate of ozone degradation. Furthermore, the negative ion generators 3, due to electrostatic attraction, have an adsorption and adhesion effect on fine particulate matter. The electrostatic field not only adsorbs and decomposes substances but also guides airflow.

[0035] A further embodiment involves a heated degradation chamber 8 located below the conveyor belt 6 within the degradation chamber 1. This heated degradation chamber 8 contains several staggered far-infrared heaters 7, each corresponding to a second degradation catalyst plate 9. The outlet of the heated degradation chamber 8 is connected to the disinfection chamber 12 via a second outlet fan 18. When the degrading dry fog is blown downwards, it enters the far-infrared heaters 7, which heat it to 40-50°C. Through the synergistic degradation action of the far-infrared heaters 7 and the second degradation catalyst plates 9, the fog undergoes secondary degradation, further reducing ozone levels and lowering the ozone content at the device outlet.

[0036] A second disinfection chamber is located below the conveyor belt 6 within the disinfection chamber 12. This second disinfection chamber contains several oxidizing dry fog disinfection modules 13. The heating degradation chamber 8 is connected to the second disinfection chamber, and the outlet of the second disinfection chamber is connected to the disinfection chamber 12. The oxidizing dry fog disinfection modules 13 in the second disinfection chamber spray dry fog through nozzles 14, disinfecting the goods 15 from below. The oxidizing dry fog disinfection modules 13 in the second disinfection chamber work together with the oxidizing dry fog disinfection modules 13 above the goods 15, and the disinfecting dry fog in the second disinfection chamber mixes with the degradation dry fog from the heating degradation chamber 8, causing the dry fog temperature to rise. This higher temperature further enhances the disinfection effect.

[0037] A first movable plate 16, which can be pushed open, is provided at the entrance of the disinfection device and the conveyor belt 6. A second movable plate 5, which can be pushed open, is provided at the exit of the conveyor belt 6. A third movable plate 17, which can be pushed open, is provided between the disinfection chamber 12 and the degradation chamber 1. When the first movable plate 16, the second movable plate 5, and the third movable plate 17 are not in the open state, they are in the closed state, making the disinfection chamber 12 and the degradation chamber 1 independent and closed cavities. They can be pushed open by the movement of the goods.

[0038] A method for disinfecting goods includes the following steps:

[0039] 1) Goods enter through the inlet of the disinfection device, pass through the disinfection chamber, and are thoroughly disinfected by a mixture of ozone and hydroxyl radicals in the disinfection chamber; part of the mixed dry fog is used for disinfection of the goods, and the other part enters the degradation module in the degradation chamber.

[0040] 2) The goods enter the degradation chamber, where the ozone overflowing from the disinfection chamber is degraded. During the degradation process, oxygen molecules, water, and a small amount of hydroxyl radicals are generated, which perform secondary disinfection on the goods. The degradation dry fog and the very small amount of residual ozone are blown into the heated degradation chamber below the goods, where they are further heated and degraded through the synergistic effect of the far-infrared heater 7 and the second degradation catalyst plate 9.

[0041] 3) After undergoing secondary disinfection, the goods are transported out of the unit's outlet, where the ozone content is below 0.16 mg / m³. 3 It meets national standards for leakage from ozone-based disinfection equipment.

[0042] The dry fog, after being further degraded in the heating and degradation chamber, can re-enter the disinfection chamber to continue participating in disinfection, thus forming a circulating disinfection dry fog inside the device. The far-infrared heater 7 emits far-infrared rays to further catalyze and degrade residual ozone and harmful substances. The exhaust gas re-enters the disinfection chamber 12 through the second outlet fan 18 for a new round of chemical reaction to circulate and disinfect the goods. The dry fog is recycled and reused, which can improve the disinfection effect and safety of the entire device.

[0043] The above-described embodiments are preferred embodiments. It should be noted that the above-described preferred embodiments should not be considered as limitations on the invention, and the scope of protection of the invention should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of the invention, and these improvements and modifications should also be considered within the scope of protection of the invention.

Claims

1. A cargo disinfection device, characterized in that: The system includes a disinfection chamber (12), a degradation chamber (1), and a conveyor belt (6). The disinfection chamber (12) is equipped with several oxidative dry fog disinfection modules (13), which are positioned above the conveyor belt (6). The degradation chamber (1) is equipped with a degradation module. The conveyor belt (6) passes through the disinfection chamber (12) and the degradation chamber (1) to transport goods. The oxidative dry fog disinfection module (13) includes an ozone generator and a hydroxyl radical generator. The oxidative dry fog disinfection module (13) first dissolves ozone in water to form ozone water, and then atomizes it into ozone dry fog through ultrasonication. During the ozone decomposition process, hydroxyl radicals are formed. The oxidative dry fog disinfection module (13) generates a mixed dry fog of ozone and hydroxyl radicals in the disinfection chamber (12). The dry fog disinfects the goods once. The degradation module is located above the conveyor belt (6). The degradation module is used to degrade ozone in the degradation chamber (1). The degradation module is connected to the disinfection chamber (12) through the inlet fan (10) of the degradation chamber. The outlet of the degradation module is connected to the degradation chamber (1) through the first outlet fan (4). The degraded ozone mixed with dry fog is blown into the degradation chamber (1) through the first outlet fan (4) and comes into contact with the transported goods. Hydroxyl free radicals are generated during the degradation to disinfect the goods a second time. A heated degradation chamber (8) is provided in the degradation chamber (1) below the conveyor belt (6). Several far-infrared heaters (7) are arranged in a staggered manner in the heated degradation chamber (8), and each far-infrared heater (7) corresponds to a second degradation catalyst plate (9). The outlet of the heated degradation chamber (8) is connected to the disinfection chamber (12) through a second outlet fan (18). A second disinfection chamber is provided inside the disinfection chamber (12) and below the conveyor belt (6). Several oxidative dry fog disinfection modules (13) are provided in the second disinfection chamber. The heating degradation chamber (8) is connected to the second disinfection chamber. The outlet of the second disinfection chamber is connected to the disinfection chamber (12). The oxidative dry fog disinfection module in the second disinfection chamber sprays dry fog through the nozzle (14) to disinfect the goods (15) from below. The oxidative dry fog disinfection module (13) in the second disinfection chamber works together with the oxidative dry fog disinfection module (13) above the goods (15) on the goods (15). The disinfection dry fog in the second disinfection chamber mixes with the degradation dry fog from the heating degradation chamber (8), causing the dry fog temperature to rise.

2. The cargo disinfection device according to claim 1, characterized in that: The disinfection chamber (12) and the degradation chamber (1) are separated from each other to form a separate closed chamber.

3. The cargo disinfection device according to claim 1 or 2, characterized in that: The degradation module includes several first degradation catalyst plates (11), each first degradation catalyst plate (11) corresponds to an ultraviolet lamp tube (2), and the several first degradation catalyst plates (11) are arranged in an alternating manner to form an S-shaped channel.

4. The cargo disinfection device according to claim 3, characterized in that: The degradation module also includes several negative ion generators (3), which are evenly distributed in an S-shaped channel formed by several degradation catalyst plates (11) arranged in an alternating manner.

5. The cargo disinfection device according to claim 1, characterized in that: The disinfection device is provided with a first movable plate (16) that is pushed open at the entrance of the conveyor belt (6), a second movable plate (5) that is pushed open at the exit of the conveyor belt (6), and a third movable plate (17) that is pushed open between the disinfection chamber (12) and the degradation chamber (1).

6. A method for disinfecting goods using the disinfection device according to any one of claims 1 to 5, characterized in that: Includes the following steps: 1) Goods enter through the inlet of the disinfection device, pass through the disinfection chamber, and are thoroughly disinfected in the disinfection chamber by a mixture of ozone and hydroxyl radicals in dry fog; 2) The goods enter the degradation chamber, where the ozone overflowing from the disinfection chamber is degraded. During the degradation process, a small amount of hydroxyl radicals are generated, which perform secondary disinfection on the goods. 3) After undergoing secondary disinfection, the goods are transported out of the device's outlet, where the ozone content is below 0.16 mg / m³.

7. The cargo disinfection method according to claim 6, characterized in that: The mixed dry fog of ozone and hydroxyl radicals generated in step 1) is used partly for disinfection of the goods and partly enters the degradation module in the degradation chamber. After degradation by the degradation module, oxygen molecules, water, and a small amount of hydroxyl radicals are generated. The degraded dry fog then enters the heated degradation chamber below the goods through the goods for heated degradation.

8. The cargo disinfection method according to claim 7, characterized in that: The heated and degraded dry fog re-enters the disinfection chamber to continue disinfection, forming a circulating disinfection dry fog inside the device.

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