CN112237642A - Disinfection and sterilization system - Google Patents

Abstract

The invention relates to a sterilization system comprising: a powered gas source device configured to provide nitrogen gas having a purity greater than 95%; a vaporizing device configured to provide a vaporized sterilizing gas; the tail gas treatment device is communicated with the airtight enclosure structure; and the display control device is electrically connected with the vaporization device, the tail gas treatment device and the electromagnetic valves and can control the flow rate of the sterilizing gas. The method combines the disinfection gas and the low-oxygen modified atmosphere, has good diffusivity, penetrability and use uniformity, and is an environment-friendly, residue-free and pollution-free disinsection and sterilization method. Moreover, the tail gas treatment device is used for treating tail gas, so that the influence on the environment and the human body is prevented.

Description

Disinfection and sterilization system

Technical Field

The invention relates to the field of controlled atmosphere insecticidal disinfection, in particular to a disinfection and sterilization system.

Background

The traditional disinfection and sterilization method usually adopts a chemical fumigation method, common fumigants comprise methyl bromide, phosphine, sulfuryl fluoride, ethylene oxide and the like, and although the method has the advantages of simple operation, low treatment cost, thorough disinsection and sterilization, wide application field and the like, the method is not beneficial to the safe storage of the Tibetan products and the body health of workers due to the reasons of large chemical hazard, long residual period and the like, and is gradually eliminated in the field of disinsection and sterilization of archives and books. Chlorine dioxide, cinnamaldehyde, citral and the like are a new generation of green disinfectant which is widely, efficiently and safely accepted at present. It has the function of killing almost all bacteria, mould, fungus and virus. The green disinfectant has good diffusivity, penetrability and use uniformity, is used for disinfecting the collection such as cultural relics, books and archives, and realizes the omnibearing disinfection of the surfaces of air and objects.

However, the disinfectant only has an effect on bacteria, viruses and the like of articles, and has little effect on killing pests, and no system capable of sterilizing and killing pests exists at present.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a disinfection and sterilization system, which comprises: a powered gas source device configured to provide nitrogen gas having a purity greater than 95%; a vaporization device configured to provide a vaporized sterilant; the first branch is connected between the vaporizing device and the airtight enclosure structure; the tail gas treatment device is communicated with the airtight enclosure structure; and the display control device is electrically connected with the power gas source device, the vaporizing device and the tail gas treatment device and can control the opening and closing of each electromagnetic valve.

The system as described above, wherein the vaporizing device forms a hermetically closed circuit with the hermetically sealed enclosure.

The system as described above, the vaporization apparatus further comprising a fan to facilitate a flow of gas within the gas tight enclosure into the vaporization apparatus.

The system as described above, wherein the vaporization apparatus is located inside the airtight enclosure.

The system as described above, wherein the display and control device exhausts the gas containing the disinfectant in the airtight enclosure after being purified by the tail gas treatment device before exhausting the gas into the atmosphere.

The system as described above, wherein the display and control device is configured to control the on/off of the vaporization device, the output concentration of the sterilant, and the gas flow rate.

The system as described above, wherein the gas detection device is configured to detect the concentration of the disinfectant, the temperature and humidity, and the oxygen content in the airtight space.

The system as described above, further comprising: the second branch is arranged between the power air source device and the airtight enclosure structure; and a third branch between the powered air supply device and the vaporization device.

As with the system described above, a method of using a sterilization system comprising: filling nitrogen into the airtight enclosure structure to reduce the oxygen content of the airtight enclosure structure to a set oxygen content value; and starting a fan in the vaporizing device to enable the gas in the airtight enclosure to pass through the vaporizing device and bring the sterilizing gas into the enclosure structure.

The system as described above, further comprising: and the humidity control device is arranged on the second branch.

The method combines the disinfectant and the low-oxygen modified atmosphere to kill insects and sterilize the Tibetan products, has good diffusivity, penetrability and use uniformity, and is an environment-friendly, residue-free and pollution-free disinfection method. Moreover, the tail gas treatment device is used for treating tail gas, so that the influence on the environment and the human body is prevented.

Drawings

Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a sterilization system according to one embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural and logical changes may be made to the embodiments of the present application.

FIG. 1 is a schematic diagram of a sterilization system according to one embodiment of the present invention. As shown, the sterilization system 100 includes a display control device 110, a vaporization device 120, a tail gas treatment device 130, a gas detection device 160, and a fresh air device 170. The display and control device 110 is electrically connected to the vaporization device 120, the tail gas treatment device 130, the gas detection device 160 and the fresh air device 170, respectively, and controls the devices to start or stop to complete a certain function. Meanwhile, the display control device can control the opening and closing of each valve so as to control the trend and the circulation mode of the gas.

In some embodiments, the display and control device 110 includes a controller and an interaction device. The processor can be a single chip microcomputer, and controls the device to start or stop working according to a preset program so as to realize certain functions. The interaction device can be a touch screen, can display parameters such as temperature and humidity and concentration of the sterilizing gas in the airtight space in real time, and can also receive data generated by interaction of a user and the touch screen.

The vaporizing device 120 includes a sterilizing gas generating device capable of outputting a sterilizing gas of high purity. In some embodiments, vaporizing device 120 comprises a high pressure gas cylinder in which the sterilizing gas is mixed with nitrogen. The vaporizing device 120 is connected with the airtight enclosure through a solenoid valve 121 and a flow regulator 122 to form a first branch. The solenoid valve 121 and the flow regulator 122 are electrically connected to the display and control device 110, and are configured to control the opening of the vaporizing device 120, the concentration of the sterilizing gas, and the flow rate of the gas. In some embodiments, the vaporization device, including the sterilizing gas generating device, is located inside the airtight enclosure and delivers the sterilizing gas directly into the airtight enclosure. The disinfectant comprises chlorine dioxide, cinnamaldehyde, citral and the like, and is an efficient and safe green disinfectant.

In some embodiments, the vaporizing device further comprises a fan, and the vaporizing device is connected to the airtight enclosure in a closed loop, and the gas inside the airtight enclosure can be used as power gas to bring the sterilizing gas inside the vaporizing device into the airtight enclosure, as shown in fig. 1, the solenoid valves 121 and 124 are opened, and the solenoid valves 123 and 131 are closed, so that the vaporizing device 120 forms a closed loop with the airtight enclosure. The method has the advantages that the content of other gases in the airtight enclosure structure is not changed, the disinfectant or the disinfectant gas cannot overflow in a closed loop mode to cause waste, and meanwhile, the influence on the environment is avoided.

The tail gas treatment device 130 is connected with the airtight enclosure in an airtight manner and is used for purifying the sterilizing gas in the gas discharged from the airtight enclosure and the harmful gas released by the hidden substances in other sterilizing processes so as to prevent the harmful gas from affecting the environment or human bodies. In some embodiments, the tail gas treatment device 130 discharges the gas directly to the outside or into a well-ventilated environment; in other embodiments, the exhaust gas treatment device 130 re-delivers the gas passing through the recovery device to the airtight enclosure, so as to recycle the gas and save energy.

The gas detection device 160 is arranged in the airtight enclosure and is electrically connected with the display and control device 110. The gas detection device 160 includes a temperature detection device, a humidity detection device, an oxygen content detection device, and a disinfection gas concentration detection device, and is configured to detect the disinfection gas concentration, the temperature and humidity, and the gas oxygen content in the airtight enclosure and report to the display and control device 110.

The fresh air device 170 is connected with the airtight enclosure structure through a pipeline and is electrically connected with the display and control device 110. The fresh air device 170 is used for introducing fresh air into the airtight enclosure structure to reduce the concentration of the sterilizing gas in the airtight enclosure structure, or discharging the gas in the airtight enclosure structure.

According to one embodiment of the present application, the sterilization system 100 further includes a powered air supply device 140 and a humidity control device 150. The power gas source device 140 is connected with the airtight enclosure structure sequentially through the electromagnetic valve 151 and the humidity control device 150 to form a second branch, and the second branch is configured to provide nitrogen with the purity higher than 95% to the airtight enclosure structure; the power air supply device 140 is connected with the vaporizing device 120 through the solenoid valve 123 to form a third branch. The display and control device 110 is electrically connected to the power air source device 140 and the humidity control device 150, respectively, to control the opening and closing of the two devices, so as to perform some functions. The display and control device 110 is electrically connected to the solenoid valves 123 and 151, respectively, and is configured to open or close a plurality of solenoid valves to form a plurality of branches for providing gases with different component distribution ratios and humidities.

The powered air supply assembly 140 includes, but is not limited to, a nitrogen plant, an air compression system, a filtration purification system, and an air distribution test, which are used to reduce the oxygen content in the air tight enclosure. When the airtight enclosure structure is oxygen-reduced, the electromagnetic valve 151, the humidity control device 150 and the air outlet of the airtight enclosure structure are opened, the nitrogen of the power air source device 140 is conveyed into the airtight enclosure structure, and the gas in the airtight enclosure structure is replaced, so that the purpose of reducing the oxygen content is achieved. In some embodiments, powered air supply assembly 140 includes: a purity adjustment device comprising one or more branches that can be controlled to provide gases of different concentration ratios; and a gas distribution device comprising one or more branches that can be controlled to provide gases of different composition ratios.

The humidity control device 150 is used to control the humidity of the passing gas. In some embodiments, the humidity control device 150 is controlled by an isenthalpic humidification method, the control precision is less than or equal to ± 5%, and the stability is good. In some embodiments, the humidity control device 150 will be able to control the relative humidity of the gas at 20% -80%.

It is generally considered that the temperature, pH, presence or absence of organic matter, and the like have a relatively large influence on the disinfection effect of chlorine dioxide. The inventors have found that humidity changes also have some effect on the disinfection effect. Since many of the items to be disinfected also have a high requirement for humidity, a balance between humidity regulation and disinfection needs to be achieved. In some embodiments, a relative humidity of 48-51% has the best disinfection effect. If the items to be sterilised can be adapted to such a humidity range, the humidity in the air-tight enclosure is adjusted to be between 48-51% for sterilisation. If the humidity range of the article to be disinfected is outside the range, the disinfection treatment can be carried out in an intermittent regulation mode. For example, the sterilization process may be performed by adjusting the humidity within the air-tight enclosure to between 48-51% for a period of time, and then adjusting the humidity within the air-tight enclosure to a humidity suitable for the items to be sterilized. The circular treatment can achieve the best disinfection effect, reduce the use and discharge of the disinfectant and shorten the disinfection time; the items to be disinfected can also be protected against damage due to moderate changes.

The invention also comprises a disinsection and sterilization method which is carried out by adopting the disinfection and sterilization system, firstly, nitrogen is filled into the airtight enclosure structure through the power air source device, and the gas in the airtight enclosure space is replaced, so that the oxygen content is reduced to a set range; then starting the vaporizing device, and introducing vaporized gas of the disinfectant into the space to set concentration.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.

Claims (10)

1. A sterilization system comprising:

a powered gas source device configured to provide nitrogen gas having a purity greater than 95%;

a vaporization device configured to provide a vaporized sterilant;

the first branch is connected between the vaporizing device and the airtight enclosure structure;

the tail gas treatment device is communicated with the airtight enclosure structure; and

and the display control device is electrically connected with the power gas source device, the vaporizing device and the tail gas treatment device and can control the opening and closing of each electromagnetic valve.

2. The system of claim 1, wherein the vaporization device forms a hermetically closed circuit with the hermetically sealed enclosure.

3. The system of claim 2, the vaporization device further comprising a fan to facilitate a flow of gas within the airtight enclosure into the vaporization device.

4. The system of claim 1, wherein the vaporization device is located inside the airtight enclosure.

5. The system of claim 1, wherein the display and control device is configured to purge the disinfectant-containing gas from the air tight enclosure prior to venting into the atmosphere.

6. The system of claim 1, wherein the display and control device is configured to control the start-stop of the vaporization device, the output concentration of the sterilant, and the gas flow rate.

7. The system of claim 1, wherein the gas detection device is configured to detect a concentration of the sterilant, a temperature and humidity, and an oxygen content within the gas-tight space.

8. The system of claim 7, further comprising:

the second branch is arranged between the power air source device and the airtight enclosure structure; and

and the third branch is arranged between the power air source device and the vaporizing device.

9. The system of claim 1, the method of using the sterilization system comprising:

filling nitrogen into the airtight enclosure structure to reduce the oxygen content of the airtight enclosure structure to a set oxygen content value; and

and starting a fan in the vaporizing device to enable the gas in the airtight enclosure to pass through the vaporizing device and bring the sterilizing gas into the enclosure structure.

10. The system of claim 10, further comprising: and the humidity control device is arranged on the second branch.

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