TWI603775B - Chlorine dioxide gas processing structure, chlorine dioxide gas processing device, sterilization device, and environmental purification device - Google Patents

Description

Chlorine dioxide gas treatment structure, chlorine dioxide gas treatment device, sterilization device and environmental purification device

The present invention relates to a chlorine dioxide gas treatment structure, a chlorine dioxide gas treatment device, a sterilization device, and an environmental purification device which are used to purify chlorine dioxide gas in the surrounding environment and are reduced to a safe concentration for a short period of time.

In the space where people live, there are extremely small particles such as dust and cigarette smoke, various atmospheric pollutants, floating bacteria, organic volatile gases derived from chemicals such as paints, and odors derived from human bodies and various products. Various kinds of particles, gases, molds, harmful bacteria, and the like.

In order to reduce these bacteria that are harmful to the human body, purification treatment such as sterilization/deodorization is performed. Chlorine dioxide gas has been known from the past to be extremely excellent in purification such as sterilization/deodorization. However, chlorine dioxide gas has a pungent odor such as chlorine or ozone at normal temperature and normal pressure, and is unstable to light and heat. Therefore, in order to use chlorine dioxide gas in a stable state without danger, a stable chlorine dioxide in which chlorine dioxide gas is stabilized by alkali in pure water has been developed. So proposed the state of the gel, Stability in a liquid state or a solid state The technique in which chlorine dioxide is activated to take out chlorine dioxide gas to contact a purification object in a space to purify the inside of the space in a wide range.

According to the conventional purification treatment with chlorine dioxide gas, the residual chlorine dioxide gas system contained in the treated gas is reduced to a low concentration by filtration/adsorption by water or activated carbon. Further, although there is still a lot of discomfort regarding the photodecomposition of chlorine dioxide gas, it is known that chlorine dioxide gas is decomposed by ultraviolet rays (Patent Document 1; paragraph 0004). Therefore, the chlorine dioxide gas acting on the purification treatment can be discharged and diffused into the atmosphere after being lowered to a low concentration as described above.

As long as it is an air conditioner that can directly discharge chlorine dioxide gas to the outside and is provided with an exhaust duct, the chlorine dioxide gas discharged from the exhaust duct can be discharged to a large amount of air outside the room and diluted. However, the sterilizing device for purifying medical instruments used in hospitals allows the sterilized chlorine dioxide gas to reach a predetermined concentration below the human body and then diffuse around the instrument. Here, the concentration of human body safety is based on the concentration of chlorine dioxide gas based on the Occupational Safety and Health Administration (OSHA) standard, and the time load average (TWA) during the period of 8 hours a day or 40 hours a week is Set to 0.1 ppm or less. In addition, in the benchmark of the American Association of Governmental Industrial Hygienists (ACGIH), in addition to the above, the 15-minute short exposure limit value (STEL) is set to 0.3 ppm, so it is necessary to continuously maintain the chlorine dioxide gas. This range of low concentrations. However, according to the conventional method of reducing chlorine dioxide gas by adsorption to activated carbon or the like, since the adsorption becomes slow after reaching a concentration lower than a predetermined concentration, before the chlorine dioxide gas reaches a low concentration that can be discharged It takes a long time.

On the other hand, it is also proposed to discharge high concentration of chlorine dioxide gas into the space. The technology to purify the environment within the space. For example, in Patent Document 2, the dissolved chlorine dioxide can be contained in a high concentration by a pure chlorine dioxide gas liquid, and the concentration can be adjusted from a high concentration to a low concentration (Patent Document 2; Paragraph 0072). Further, Patent Document 3 discloses a technique of fumigation of a contaminated space or article using chlorine dioxide at a higher concentration than in the past. According to Patent Document 3, it takes at least 5 to 6 hours to remove chlorine dioxide (Patent Document; Paragraph 0024).

In the case of using a high concentration of chlorine dioxide as in the techniques of Patent Document 2 and Patent Document 3, there is a problem that it is necessary to remove chlorine dioxide for a long period of time, which hinders the use of a high concentration of chlorine dioxide gas for environmental purification. popular. In addition, since the emission amount of the chlorine dioxide gas affects the external environment even at a low concentration, it is necessary to efficiently reduce the chlorine dioxide gas treatment structure and apparatus in a short time.

The present inventors conducted various experiments while irradiating ultraviolet rays to chlorine dioxide gas, and in order to reduce chlorine dioxide gas in a short time, it was found that an activated carbon filter or the like is used to reach a desired low concentration of chlorine dioxide gas in ultraviolet rays. The present invention is achieved by repeatedly contacting the steel wool which is wetted with water in a short time to reduce or eliminate the chlorine dioxide gas to a low concentration which is safe for the human body.

Prior Technical Literature <Patent Literature>

Patent Document 1: Japanese Patent Publication No. 4-300201

Patent Document 2: Japanese Patent Publication No. 11-278808

Patent Document 3: Japanese Patent Publication No. 2005-528930

It is a problem to solve the problem that it takes a long time to reduce the chlorine dioxide gas acting on the purification of the surrounding environment to a safe concentration for the human body.

According to a first aspect of the invention, there is provided a chlorine dioxide gas treatment structure for reducing chlorine dioxide gas in a process air containing chlorine dioxide gas, comprising: a space for circulating the air to be treated, a gas flow generating element, and a contact a layer, and an ultraviolet ray illuminating element, wherein the contact layer is a contact layer of a steel wool which is fixed by a wire made of iron and is wetted by water, the airflow generating element circulates the air to be treated in the space, and The ultraviolet ray irradiation element irradiates ultraviolet rays to the contact layer on the circulation path of the air to be treated, and the air to be treated repeatedly contacts the contact layer.

The air to be treated here refers to air containing chlorine dioxide gas which is sterilized, deodorized, and mildewed in a space in which various particles, gases, molds, harmful bacteria, and the like exist, and is not limited to human life. The space also contains, for example, air in the sterilization device. The space of the circulation is only required to circulate the air to be treated and repeatedly contact the contact layer. Further, the concentration of chlorine dioxide gas is not limited.

The wavelength of the ultraviolet light is preferably set to ultraviolet light having a wavelength of 254 nm to 270 nm which is high in absorbance of chlorine dioxide gas by ultraviolet-visible absorption spectrum analysis, but is not limited thereto (see Fig. 8). Among them, the graph in Fig. 8 is a graph in which the 500 ppm of stabilized chlorine dioxide is diluted 100 times with pure water as a dilute solution, and then subjected to ultraviolet-visible absorption spectroscopy analysis, and the obtained measurement results are plotted on the vertical axis. The absorbance, the horizontal axis represents the wavelength of ultraviolet light.

The chlorine dioxide gas is more easily reacted by irradiating chlorine dioxide gas with ultraviolet rays. Thereby, the chlorine dioxide gas which is easy to react is passed through the gas flow generating element. Ring, which is in contact with a contact layer which is wetted by water in a steel wool which is fixed by a filament made of iron, and which is capable of being oxidized even in a low concentration which is reduced in the past treatment method. Time reduces the beneficial effect of chlorine dioxide gas in the treated air. Here, the intensity of the ultraviolet ray is not limited, and the effect of reducing the chlorine dioxide gas according to the intensity of the ultraviolet ray can be used (refer to Fig. 9). In the graph of Fig. 9, the chlorine dioxide gas in a cubic container made of an acryl plate shielding the outer side of each side is changed, and the intensity of the chlorine dioxide gas is confirmed by changing the ultraviolet ray intensity. A chart that reduces trends. It is confirmed that the intensity of the ultraviolet ray is twice as high as that of the other side (the crease line of the □ mark) with respect to the other side (the fold line of the □ mark added) in all the time zones.

The airflow generating element may be any conventional fan that causes air to flow. A fan that selects an appropriate air blowing capability can be selected depending on the amount of air to be treated, the number of times the air to be treated is contacted with the contact layer. Further, the steel wool is oxidized by the chlorine dioxide gas to lower the effect of reducing the chlorine dioxide gas, and is preferably stored in a bag through which the air to be treated passes and can be exchanged.

A second invention of the present invention is the chlorine dioxide gas treatment structure according to the first aspect of the invention, wherein the filament has a diameter of 0.02 mm to 0.04 mm. Even if the weight of the steel wool is the same, the smaller the diameter of the filament, the larger the surface area thereof, and the larger the contact area of the chlorine dioxide gas. On the other hand, if the diameter of the filament becomes too small, the filament is broken and easily scattered. Even if steel wool of the same weight is used, steel wool having a filament diameter of 0.02 mm to 0.04 mm is preferable because its surface area can be increased and the filament has a width which does not break and disperse.

According to a third aspect of the present invention, in the chlorine dioxide gas treatment structure of the first or second aspect, the inner surface of the space for irradiating the ultraviolet ray from the ultraviolet ray irradiation element Prepare an ultraviolet reflective surface. The inner surface of the space is suitable for loading a film or sheet of aluminum material having a high ultraviolet reflectance. According to the third invention, strong ultraviolet rays can be irradiated even if the same ultraviolet lamp is used.

According to a fourth aspect of the present invention, in the chlorine dioxide gas treatment structure according to the first to third aspects of the present invention, the wetted element for moisturizing the steel wool with water is provided. The wetting element may allow the steel wool to enter and exit in the water storage tank to make the steel wool wet, or the sprayer may spray the water to make the steel wool wet. By providing a wetting element, the steel wool initially wetted and placed in the space is not dried, and the effect of the contact layer is continued.

According to a fifth aspect of the invention, there is provided a chlorine dioxide gas treatment apparatus for reducing chlorine dioxide gas contained in a process air after air purification by chlorine dioxide gas, comprising: reducing the chlorine dioxide gas The first processing element of the present invention, wherein the first processing element is provided with the first gas generating element and the activated carbon filter, and the chlorine dioxide gas treatment structure according to any one of the first to fourth inventions And after performing the first treatment in which the chlorine gas in the air to be treated is adsorbed by the activated carbon filter by the first airflow generating element, the chlorine dioxide gas treatment structure is used to reduce the first treatment. The chlorine dioxide gas contained in the treated air after the treatment.

According to the fifth aspect of the invention, the technique for adsorbing and treating the activated carbon filter in the past is used as the first processing element, and the concentration is a desired concentration, for example, in the range of 2.5 ppm to 5.0 ppm, and the first to fourth inventions are used. The chlorine oxide gas treatment structure reduces the concentration of chlorine dioxide gas to a safe concentration for humans. According to the adsorption treatment by the activated carbon filter of the prior art, the adsorption of chlorine dioxide gas becomes slow after reaching a predetermined concentration. Therefore, in order for the chlorine dioxide gas to reach the desired concentration, for example, less than 0.1 ppm, it will take a long time. However, according to the present invention, the activity is until the past The carbon filter can maintain the concentration of high and low efficiency, and the chlorine dioxide gas is reduced by the activated carbon filter, and then the chlorine dioxide gas concentration is lowered by treating the structure with the chlorine dioxide gas of the first to fourth inventions. , and shortened the time required for low concentration to the human body.

Further, since the chlorine dioxide gas is reacted with the steel wool after the concentration is lowered, the amount of the steel wool can be reduced. In addition, the exchange frequency of steel wool is also reduced.

According to a sixth aspect of the invention, there is provided a chlorine dioxide gas treatment apparatus for reducing chlorine dioxide gas contained in a process air after air purification by chlorine dioxide gas, comprising: reducing the chlorine dioxide gas And a chlorine dioxide gas treatment structure according to any one of the first to fourth inventions, wherein the first processing element includes a first gas flow generation element, an ultraviolet irradiation element, and a steel wool which is fixed as a contact layer by a wire made of iron; and the ultraviolet light is irradiated to the contact layer by the ultraviolet ray irradiation element, and the air is processed by the first air flow generating element. After the first chlorine dioxide gas is circulated to the contact layer and brought into contact therewith, the chlorine dioxide gas treatment structure is used to reduce the chlorine dioxide gas contained in the air to be treated after the first treatment.

In the sixth invention of the present invention, in place of the adsorption by the activated carbon filter of the first treatment element of the fifth invention, the steel wool layer is used as a contact layer, and the air to be treated is circulated while being irradiated with ultraviolet rays. The element contacting the contact layer is used as the first processing element of chlorine dioxide gas. Even when the steel wool was irradiated with ultraviolet rays while being irradiated with the air to be treated, as described later (evaluation result 2-1) and (evaluation result 2-2), it was confirmed that the effect was substantially the same as that of the activated carbon filter. Here, the diameter of the filament of the steel wool is suitably 0.02 mm to 0.04 mm.

According to a seventh aspect of the invention, the sterilizing apparatus for sterilizing the medical device with the chlorine dioxide gas is provided, and the chlorine dioxide gas treating structure according to any one of the first to fourth aspects of the invention is provided. By having the chlorine dioxide gas treatment structure according to the first to fourth inventions of the present invention, the concentration of the chlorine dioxide gas having a high concentration for sterilization is brought to a desired concentration, for example, a time shorter than 0.1 ppm becomes short. The sterilization device can sterilize the medical instrument in a short cycle, and the sterilization device can be effectively utilized.

According to an eighth aspect of the present invention, the chlorine dioxide gas is introduced into an enclosed environment in which an air purifying device is installed, and an article in the environment is brought into contact with the chlorine dioxide gas and purified. The chlorine dioxide gas treatment structure according to any one of claims 1 to 4. By the chlorine dioxide gas treatment structure according to any one of the first to fourth aspects of the present invention, the concentration of a large amount of high-concentration chlorine dioxide gas acting on environmental purification such as mold removal is brought to a desired concentration. For example, 0.1 ppm, the time is shortened, and the object of purification by chlorine dioxide gas is expanded. For example, even in areas with many residential buildings, it is possible to cover all the residential buildings with sheets, to remove mold and sterilize all the items in the house with chlorine dioxide gas, and to reduce the chlorine dioxide gas in a short time. As a hypoallergenic means for occupants.

According to the first invention of the present invention, the gas generating element causes the chlorine dioxide gas which is easily reacted to be circulated, and is in contact with the contact layer in which the steel wool which is fixed by the iron filament is wetted by water. Further, the iron is oxidized, and even if it is a low concentration which is lowered slowly in the conventional treatment method, it has an advantageous effect that the chlorine dioxide gas in the air to be treated can be reduced in a short time.

According to the second invention of the present invention, it is more suitable to increase the amount of dioxane under the same weight. The surface area of the iron reacted by the chlorine gas, the filament does not break the scattered person.

According to the third invention of the present invention, strong ultraviolet rays can be irradiated even if the same ultraviolet lamp is used.

According to the fourth aspect of the present invention, by providing the wetting element, the steel wool which is initially wetted and placed in the space does not dry, and the effect of the contact layer is continued.

According to the fifth invention of the present invention, the activated carbon filter can maintain the concentration at a high and low efficiency, and the concentration of the chlorine dioxide gas is lowered by the activated carbon filter, and when the decreasing tendency of the activated carbon filter reaches a slower concentration. Further, by reducing the concentration of the chlorine dioxide gas by the chlorine dioxide gas treatment structure according to any one of the first to fourth inventions, it is possible to shorten the time required for low concentration to be safe for human body.

According to the sixth aspect of the present invention, in the same manner as the fifth aspect, the contact layer of the steel wool is irradiated with ultraviolet rays to reduce the concentration of the chlorine dioxide gas, and the concentration is slow, and then the first to fourth inventions are used. Any of the chlorine dioxide gas treatment structures described herein reduce the concentration of chlorine dioxide gas to reduce the time required to achieve a low concentration for human safety.

According to the seventh invention of the present invention, it is possible to shorten the concentration of the chlorine dioxide gas to a desired concentration, for example, 0.1 ppm, and the sterilization apparatus can sterilize the medical apparatus in a short period of time, thereby effectively utilizing the sterilization apparatus. .

According to the eighth invention of the present invention, the concentration of a large amount of high-concentration chlorine dioxide gas acting on environmental purification such as mold removal reaches a desired concentration, for example, 0.1 ppm, and the chlorine dioxide gas is allowed to be made. The object of purification is expanded.

100, 200, 300‧‧‧ chlorine dioxide gas treatment device

400‧‧‧ sterilizer

10‧‧‧1st processing component

20‧‧‧ chlorine dioxide gas treatment structure

30‧‧‧Introduction of air

40‧‧‧Intermediate air treatment

50‧‧‧Draining air

11‧‧‧Active carbon filter

12‧‧‧ Container

13‧‧‧Fan

14‧‧‧ arrow

15‧‧‧Detecting the suction port

16‧‧‧Detection tube for chlorine dioxide gas

21‧‧‧ Steel wool

22‧‧‧ Container

23‧‧‧Fan

24‧‧‧UV illumination components

25‧‧‧ arrow

26‧‧‧Water storage tray

27‧‧‧ Concentration detection location

28‧‧‧Aluminum foil

60‧‧‧1st processing component

61‧‧‧ Steel wool

62‧‧‧ Container

63‧‧‧Fan

64‧‧‧UV illumination components

70‧‧‧ container

71‧‧‧1st processing component

72‧‧‧ chlorine dioxide gas treatment structure

80‧‧‧ Medical Device Storage Department

81‧‧‧ chlorine dioxide gas generating components

82‧‧‧1st processing component

83‧‧‧ chlorine dioxide gas treatment structure

84‧‧‧ vents

85‧‧‧Stable chlorine dioxide water

86‧‧‧UV illumination components

87‧‧‧fan

88‧‧‧ vents

89‧‧‧fan

90‧‧‧Active carbon filter

91‧‧‧ vents

92‧‧‧ Steel wool

Figure 1 is a schematic view showing the structure of a chlorine dioxide gas treatment device (Example 1)

Fig. 2 is a graph showing the evaluation results of the chlorine dioxide gas treatment structure (Example 1)

Figure 3 is an evaluation chart showing the structure of a small chlorine dioxide gas treatment (Example 1)

Figure 4 is a schematic view showing the structure of a chlorine dioxide gas treatment device (Example 2)

Fig. 5 is a graph showing the evaluation results of the first processing element (Embodiment 2)

Figure 6 is a schematic view showing the structure of a chlorine dioxide gas treatment device (Example 3)

Figure 7 is a diagram showing the processing steps of the sterilization device (Embodiment 4)

Figure 8 is a graph showing the experiment of ultraviolet-visible absorption spectroscopy

Figure 9 is a graph showing the decrease in UV intensity and chlorine dioxide gas.

By lowering the concentration of chlorine dioxide gas to the desired low concentration with the first processing element, the chlorine dioxide treatment structure is further reduced to a low concentration safe to the human body, thereby realizing the chlorine dioxide gas to be short. Time is reduced to the purpose of safe concentration for the human body.

"Embodiment 1"

The chlorine dioxide gas treatment apparatus 100 of the first embodiment will be described with reference to Fig. 1 . Fig. 1 is a schematic view showing the structure of a chlorine dioxide gas treating apparatus 100 of the first embodiment. It is roughly shown that the concentration of chlorine dioxide gas introduced into the air 30 before the treatment of the high-concentration chlorine dioxide gas is treated with a low concentration intermediate treatment of adsorbing chlorine dioxide gas using the activated carbon filter 11 to 2.0 ppm to 5.0 ppm. The first processing element 10 of the air 40 and the intermediate processing air 40 are treated to a lower concentration than the chlorine dioxide gas concentration of 0.1 ppm which is safe for the human body, and are used as the chlorine dioxide gas treatment structure for discharging the air 50. The main components of the chlorine dioxide gas treatment device 100 composed of 20.

The first processing element 10 of the first embodiment is housed in a cubic container 12 composed of an acryl plate having 1 m each side, but the shape and size of the container 12 are of course not limited. It is here. A fan 13 for circulating the introduced air 30 is provided in the container 12. The air flow generated by the fan 13 passes through the activated carbon filter 11 provided in front of the fan 13 as indicated by an arrow 14 shown in the first processing element 10, so that the air contained in the introduction air 30 is included. The chlorine oxide gas is adsorbed by the activated carbon filter 11.

The air volume of the fan 13 and the size and thickness of the activated carbon filter 11, and the capacity of the activated carbon may be appropriately selected depending on the concentration and amount of the chlorine dioxide gas contained in the introduction air 30 in the introduction container 12. Here, the activated carbon filter 11 can be applied as long as it is an activated carbon filter 11 capable of adsorbing an acid gas, and may be powdered carbon or granular carbon. Further, of course, an activated carbon layer for a neutral gas and an activated carbon layer for an alkaline gas may be used in combination.

In the first processing element 10, a detection suction port 15 of a switch can be disposed in the vicinity of the discharge port of the intermediate process air 40, so that the detection suction port 15 becomes a switchable state, and the processed air in the container 12 is taken there. The detection tube 16 for chlorine dioxide gas is sucked to measure the concentration of chlorine dioxide gas, and the structure of the first processing element 10 is simplified. The chlorine dioxide gas detecting tube 16 can use a gas concentration detecting tube of the company GASTEC (registered trademark). On the other hand, although not shown, a conventional detecting element (refer to Japanese Laid-Open Patent Publication No. 2007-68612) can be used as a chlorine dioxide gas concentration detecting element to measure the concentration of chlorine dioxide gas.

The chlorine dioxide gas concentration of the introduced air 30, which is applied to the air purification and has a high chlorine dioxide gas concentration, is detected as the intermediate processing air 40 after the first processing element 10 is processed to the required low concentration. The discharge to the chlorine dioxide gas treatment structure 20 is guided by the first processing element 10.

The chlorine dioxide gas treatment structure 20 is also a cubic container 22 that is housed in an acrylic plate having sides of 1 m. However, the shape and size of the container 22 are of course not limited to this. The container 22 includes a fan 23, an ultraviolet ray irradiation element 24, and a steel wool 21 in a wet state. Further, an aluminum foil 28 is placed on the inner surface of the container 22. In order to prevent the ultraviolet ray irradiated by the ultraviolet ray irradiation element 24 from leaking to the outside, and to reflect the ultraviolet ray in the container to increase the ultraviolet ray intensity, the aluminum material is suitable, but the material is not limited to the aluminum material, and may be a foil body or a sheet of the film. body.

The gas stream generated by the fan 23 disposed in the chlorine dioxide gas treatment structure 20 is circulated to the contact layer of the laid steel wool 21 as indicated by an arrow 25 in the chlorine dioxide gas treatment structure 20 of Fig. 1. contact. The steel wool 21 laid in the chlorine dioxide gas treatment structure 20 is wetted with water, and is irradiated with ultraviolet rays by an ultraviolet ray irradiation element. The intermediate process air 40 contacts the steel wool 21 so that the chlorine dioxide gas contained in the intermediate process air 40 is treated as a low concentration discharge air 50 that is safe for the human body.

Here, the steel wool 21 forming the contact layer is 325 g of steel wool having a diameter of 0.02 mm to 0.04 mm. When the steel wool 21 is placed in the chlorine dioxide gas treatment structure 20, about 50 mL of water is sprayed in advance to be wetted by water. The steel wool 21 may be provided with a water storage tray 26 for storing water underneath, and may be properly wetted by an unillustrated member.

As the ultraviolet ray irradiation element 24, six ultraviolet light lamps GPL9 of 254 nm manufactured by Sankyo Electric Co., Ltd. and six GPLs 27 were used, and the ultraviolet light lamps of a total output of 216 W were used. The ultraviolet illuminance was measured according to the ultraviolet intensity meter of CUSTOM Co., Ltd., and the position at which the contact layer was provided was measured to be 0.345 mW/cm ² . Further, the measurement experiment was carried out under a room temperature environment of room temperature of 20 ° C and stability.

The intermediate process air detects and confirms the concentration of the chlorine dioxide gas by the chlorine dioxide gas concentration detecting element of the concentration detecting position 27 disposed at a position near the discharge port. After the concentration is safe for the human body, for example, 0.1 ppm or less, it is discharged as exhaust air 50 to the outside atmosphere. In the first embodiment, the introduction air 30 having a chlorine dioxide concentration of 50 ppm is treated as 3.6 ppm of the intermediate treatment air 40 at a time point of 8 minutes after the start of the treatment by the first treatment element, and further treated with chlorine dioxide. After 6 minutes from the start of the treatment of the intermediate process air 20, the chlorine dioxide concentration is treated to a safe concentration of 0.1 ppm or less, and the chlorine dioxide gas is not detected until 14 minutes after the start of the first treatment. As the state of the exhaust air 50.

(Evaluation Experiment 1)

Here, in order to evaluate the effect of the main components of the chlorine dioxide gas treatment structure 20 of the first embodiment, the chlorine dioxide gas treatment structure 20 of the first embodiment is used to reduce the concentration of the chlorine dioxide gas, and The oxidation chlorine gas treatment structure 20 was compared with the main components, and an experiment for confirming the effects of the main components (evaluation experiment 1) was performed. The result will be described with reference to Fig. 2 . Fig. 2 is a graph showing the evaluation results of the chlorine dioxide gas treatment structure and the comparison results. (Evaluation Result 1-1) shows the tendency of the chlorine dioxide gas concentration of the intermediate process air 40 in the case where the chlorine dioxide gas treatment structure 20 is driven to be lowered, (comparison result 1-1) shows that the steel wool which does not wet the contact layer is The chlorine dioxide gas concentration of the intermediate process air 40 in the case of irradiating ultraviolet rays is decreased, and (comparison result 1-2) shows a tendency to decrease the chlorine dioxide gas concentration of the intermediate process air 40 in the case where the steel wool is taken out only by ultraviolet rays. The concentration of chlorine dioxide gas is detected by a gas detection tube of the company GASTEC (registered trademark).

(Evaluation result 1-1)

Evaluation result of chlorine dioxide gas treatment structure (line diagram of □ mark): Chlorine gas treatment structure in which intermediate process air 40 is introduced into a vessel having a volume of 1 m ³ composed of an acrylic plate at room temperature of 20 ° C 20. The chlorine dioxide gas was treated with the structure of the chlorine dioxide gas treatment structure 20 of Example 1 from the state where the concentration of the chlorine dioxide gas was 3.6 ppm. The decrease in the concentration of this chlorine dioxide gas is shown by a line graph of the additional □ mark. The concentration of the chlorine dioxide gas is about 0.12 ppm from the time of the lapse of 4 minutes from the start of the treatment at 3.6 ppm, and becomes 0.00 ppm at the time of the lapse of 6 minutes, as shown later (comparison result 1-1), ( Comparing the results 1-2), the concentration of the chlorine dioxide gas can be lowered to a safe concentration in a short time.

(comparison result 1-1)

The result of the comparison of the case where the steel wool 21 is not wetted by water and the ultraviolet rays are irradiated only (the line drawing of the additional Δ mark): the steel wool 21 which does not wet the contact layer of the chlorine dioxide gas treatment structure 20 of the first embodiment The intermediate process air 40 is introduced as it is, and the chlorine dioxide gas is treated from the state where the concentration of the chlorine dioxide gas is 2.76 ppm. The decrease in the concentration of the chlorine dioxide gas is shown by a line graph with an additional Δ mark. The concentration of chlorine dioxide gas was 0.24 ppm from 2.76 ppm at the time of 6 minutes after the start of the treatment, and was about 0.01 ppm at the time of 10 minutes.

(comparison result 1-2)

The steel wool 21 is taken out, and the result of the comparison of only the ultraviolet rays is applied (the line drawing of the ○ mark is added): the contact layer of the steel wool of the chlorine dioxide gas treatment structure 20 of the first embodiment is taken out, and the intermediate process air 40 is introduced, from the second oxidation. The chlorine dioxide gas is treated in a state where the concentration of the chlorine gas is 2.52 ppm. The decrease in the concentration of the chlorine dioxide gas is shown by a line graph attached with the mark ○. The concentration of chlorine dioxide gas was 0.45 ppm from 2.52 ppm at the time of 6 minutes after the start of the treatment, but even if it was 0.36 ppm after 10 minutes, it was drastically more than 0.1 ppm, and the concentration which was safe for human body was not reached.

(Evaluation Experiment 2)

Next, assuming that the capacity of the chlorine dioxide gas treatment structure of the first embodiment is 0.25 m ³ , the capacity of the chlorine dioxide gas treatment structure of the first embodiment is 0.25 m ³ , and it is confirmed that even a small chlorine dioxide gas treatment structure is used regardless of the capacity. Experiment 2 will also be used to evaluate its effects. The result will be described with reference to Fig. 3. Fig. 3 is a graph showing the evaluation results of the small chlorine dioxide gas treatment structure of Evaluation Experiment 2. (Evaluation Result 2-1) shows a tendency to decrease the concentration of chlorine dioxide gas in the intermediate process air in the case where the chlorine dioxide gas treatment structure 20 is driven, (Comparative Result 2-1) shows that the steel wool which does not wet the contact layer is irradiated In the case of ultraviolet rays, the concentration of chlorine dioxide gas in the intermediate treatment air is decreased, and (comparison result 2-2) shows a tendency to decrease the concentration of chlorine dioxide gas in the intermediate process air when the steel wool is irradiated only with ultraviolet rays. As the ultraviolet ray irradiation element 24, six ultraviolet light lamps GPL9 of 254 nm wavelength manufactured by Sankyo Electric Co., Ltd. were used, and a total of 54 W ultraviolet rays were used. The steel wool forming the contact layer was the same as in Evaluation Experiment 1. The point at which the aluminum foil is placed on the inner surface of the container, the room temperature condition, and the like are also the same.

(Evaluation result 2-1)

Evaluation result of small chlorine dioxide gas treatment structure (□ mark line diagram): The intermediate treatment air 40 is introduced into the small container chlorine dioxide gas treatment structure 20 at room temperature 20 ° C, and the concentration of chlorine dioxide gas is 2.52. From the state of ppm, the chlorine dioxide gas is treated in the above structure. In Fig. 3, the decrease in the concentration of the chlorine dioxide gas is shown by a line graph of the additional □ mark. The concentration of the chlorine dioxide gas was changed from 2.52 ppm to 0.30 ppm at the time point of 2 minutes after the start of the treatment, and became 0.00 ppm at the time of the passage of 4 minutes. It is confirmed that the chlorine dioxide gas is reduced in the same manner as in the first embodiment having a large capacity, as long as the intensity of the ultraviolet ray is appropriately determined regardless of the capacity of the chlorine dioxide gas treatment structure. As shown in the following (comparison result 2-1), (comparison As a result of 2-2), the concentration of chlorine dioxide gas can be lowered to a safe concentration in a short time.

(comparison result 2-1)

Comparison result of the case where the steel wool is not wet, and only the ultraviolet rays are irradiated (the line diagram of the additional △ mark): In the small chlorine dioxide gas treatment structure, the intermediate treatment is introduced as it is without letting the water wet the contact layer. The air 40 is treated with chlorine dioxide gas from a state where the concentration of chlorine dioxide gas is 2.16 ppm. In Fig. 3, the graph of the additional Δ mark shows the decrease in the concentration of the chlorine dioxide gas. The concentration of the chlorine dioxide gas was changed from 2.16 ppm to 0.78 ppm at the time point of 2 minutes after the start of the treatment, and became 0.30 ppm at the time point of 4 minutes, and the safe concentration was not reached.

(comparison result 2-2)

The result of the comparison of the case where the steel wool is taken out and only the ultraviolet rays are irradiated (the line drawing of the ○ mark is attached): the contact layer of the steel wool in the small chlorine dioxide gas treatment structure is taken out, and the intermediate process air 40 is introduced, from the chlorine dioxide gas. The chlorine dioxide gas is treated in a state of a concentration of 2.10 ppm. A decrease in the concentration of the chlorine dioxide gas is shown by a line graph attached with the mark ○. The concentration of chlorine dioxide gas was from 1.00 ppm at a time point of 1.08 ppm after 2 minutes from the start of the treatment, and at a concentration of more than 0.48 ppm at the time of 4 minutes, the safe concentration was not reached.

<<Example 2》

The chlorine dioxide gas treatment apparatus 200 of the second embodiment will be described with reference to Fig. 4 . Fig. 4 is a schematic view showing the structure of a chlorine dioxide gas treating apparatus 200. The first processing element 10 of the first embodiment is replaced to allow the high concentration of chlorine dioxide gas to be introduced into the air 30 for oxidation. The chlorine gas contact state is steel wool irradiated with ultraviolet rays, and is used as the first processing element 60 for making the chlorine dioxide gas the required low-concentration intermediate process air 40. As for the treatment of the intermediate treatment air 40 to a concentration lower than 0.1 ppm of the chlorine dioxide gas concentration of the human body, the chlorine dioxide gas treatment structure 20 of the discharge air 50 is the same as in the first embodiment, in the drawings. The same symbols are given and the description thereof is omitted.

The first processing element 60 of the second embodiment is housed in a cubic container 62 made of an acryl plate having 1 m each side. However, as in the first embodiment, the shape and size of the container 62 are of course not limited. herein. A fan 63 for circulating the introduction air 30 is provided in the container 62. The airflow is generated by the fan 63 as indicated by the arrow displayed on the first processing element 60. In front of the fan 63, a steel wool 61 in which ultraviolet rays are irradiated by the ultraviolet ray irradiation element 64 is provided. The introduction air 30 is passed through the steel wool 61, and the chlorine dioxide gas contained in the introduction air 30 is brought into contact with the steel wool 61 irradiated with ultraviolet rays from the ultraviolet irradiation element, and the chlorine dioxide concentration is treated to the middle of the desired concentration. Process air 40.

(Evaluation Experiment 3)

Here, referring to Fig. 5, the results of the evaluation experiment 3 of the first processing element of the intermediate treatment air 40 which is obtained by evaluating the chlorine dioxide concentration of the introduced air 30 having a high chlorine dioxide concentration are evaluated. (Evaluation Result 3-1) The first processing element of Example 1 in which chlorine dioxide gas was adsorbed to an activated carbon filter, (evaluation result 3-2) was contacted in a state where ultraviolet rays were irradiated to the steel wool filter. The first processing element of the second embodiment of the chlorine dioxide gas (comparison result 3-1) shows an experimental result of the case where only the ultraviolet ray is irradiated to lower the chlorine dioxide gas concentration. As the ultraviolet ray irradiation element, six ultraviolet light lamps GPL9 of 254 nm wavelength manufactured by Sankyo Electric Co., Ltd. were used, and a total of 54 W ultraviolet rays were used. The steel wool forming the contact layer was the same as in Evaluation Experiment 1. In the container The point at which the aluminum foil is loaded on the inner surface, the room temperature conditions, and the like are also the same.

(Evaluation result 3-1)

The evaluation result of the first processing element of Example 1 in which the chlorine dioxide gas introduced into the air is adsorbed to the activated carbon filter (the line drawing of the ○ mark is added): In the first processing element of the first embodiment, the inclusion is high. The introduction air of the concentration of chlorine dioxide gas contacts the activated carbon filter, so that the chlorine dioxide gas is adsorbed by the activated carbon filter to lower the concentration of the chlorine dioxide gas. In Fig. 5, the concentration of the chlorine dioxide gas is lowered by a line graph with the ○ mark attached. It was lowered from 50 ppm to 6.24 ppm at the time point of 5 minutes after the start of the treatment, and became 1.20 ppm at the time of 10 minutes. Since then, the concentration drop became slow, and it became 0.12 ppm at the time of 20 minutes, and it took 25 minutes until it reached 0.1 ppm after the start of the process.

(Evaluation result 3-2)

The result of the evaluation of the first processing element of the second embodiment in which the chlorine dioxide gas introduced into the air is contacted with the ultraviolet ray while irradiating the ultraviolet ray (the line drawing of the Δ mark is added): in the first processing element of the second embodiment, When the steel wool is irradiated with ultraviolet rays, the introduction air 30 containing a high concentration of chlorine dioxide gas is brought into contact with it to lower the concentration of the chlorine dioxide gas. In Fig. 5, the concentration of the chlorine dioxide gas is shown as a line graph with an additional Δ mark. Although the concentration decreased from 40 ppm to 2.40 ppm after 10 minutes from the start of the treatment, the chlorine dioxide gas concentration gradually decreased thereafter, and it took 20 minutes to reach 0.1 ppm after the start of the treatment. However, chlorine dioxide gas became undetectable 20 minutes after the start of the treatment. The result of the comparison with the first processing element of the first embodiment: the aspect of the activated carbon filter of the first embodiment was found to have a somewhat excellent reduction effect at the time of the passage of 10 minutes, but at a safe concentration. It takes a long time before 0.1ppm. On the other hand, in the concentration of chlorine dioxide to The first processing element of the second embodiment and the first processing element of the first embodiment can be used for about 10 minutes until the low concentration of 2.5 ppm, and both are evaluated as suitable as the first processing element. .

(comparison result 3-1)

The result of the comparison of the chlorine dioxide gas introduced into the air to reduce the chlorine dioxide gas (the line diagram of the additional □ mark): in the same size of the container under the same temperature conditions as in Example 1, the pair of ultraviolet rays are irradiated The introduction air 30 containing a high concentration of chlorine dioxide gas is irradiated with ultraviolet rays to lower the concentration of chlorine dioxide gas. In Fig. 5, the line diagram of the additional □ mark shows that the concentration of the chlorine dioxide gas is lowered. It decreased from 50 ppm to 47.5 ppm after 20 minutes after the start of the treatment, but the tendency to decrease was slow. On the other hand, the decreasing trend of chlorine dioxide gas can be seen in the same ratio regardless of the irradiation time zone.

Example 3

In the third embodiment, an embodiment in which the first processing element and the chlorine dioxide gas treatment structure are provided in the same container 70 will be described with reference to FIG. Fig. 6 is a schematic view showing the configuration of a chlorine dioxide gas treatment apparatus 300. The same components as those in the first embodiment are denoted by the same reference numerals and the description thereof will not be repeated. The introduction air 30 having a high concentration of chlorine dioxide gas introduced into the vessel 70 is circulated to the activated carbon filter 11 of the first treatment element 71 in a state where the chlorine dioxide gas treatment structure 72 is stopped, so that chlorine dioxide is generated. The gas concentration is lowered. Then, after the detection element detects that the chlorine dioxide gas concentration of the air to be treated in the container becomes smaller than the required concentration, the first processing element 71 is stopped, and the structure 72 is treated with chlorine dioxide gas. The ultraviolet ray irradiation element 24 is irradiated with ultraviolet rays, and the air to be treated is brought into contact with the steel wool 21 in a wet state and circulated. Thereby, the concentration of chlorine dioxide gas can be lowered in a container for a short time.

Example 4

In the fourth embodiment, an embodiment of a sterilization device for a medical device will be described with reference to Fig. 7. Figure 7 is a process diagram of the sterilization device, Figure 7 (A) shows the step of producing high concentration of chlorine dioxide gas, and Figure 7 (B) shows the high concentration of chlorine dioxide after sterilization of the medical device. The step of reducing the gas to the desired concentration, for example, from 2.0 ppm to 5.0 ppm, and Figure 7 (C) shows the concentration of chlorine dioxide gas reduced to a previously required concentration and then lowered to a safe concentration for human body. An illustration of the steps.

The sterilizing apparatus 400 includes a chlorine dioxide gas generating element 81, a first processing element 82, and a chlorine dioxide gas processing structure 83 that are in contact with the medical device housing unit 80. The chlorine dioxide gas generating element 81 is irradiated with ultraviolet rays by gel or liquid-like stable chlorine dioxide water 85 by the ultraviolet ray irradiation element 86 in a state where the vent opening 84 of the medical device accommodating portion 80 is opened, by the fan. 87. The high-concentration chlorine dioxide gas is sent to the medical device storage unit 80 as an arrow shown in Fig. 7(A), and is circulated. After the concentration of the chlorine dioxide gas in the medical device housing portion 80 reaches a predetermined concentration, the vent opening 84 can be closed, and the fan 87 can be stopped (see Fig. 7(A)).

After the medical device is sterilized, the vent opening 88 of the first processing element 82 is opened in a state where the vent hole 84 of the chlorine dioxide gas generating element 81 is closed, and the gas of the medical device accommodating portion 80 is the seventh by the fan 89. The arrow shown in the diagram (B) is circulated to the activated carbon filter 90 to cause the chlorine dioxide gas to be adsorbed and lowered to the desired concentration. The concentration required here is preferably from 2.0 ppm to 5.0 ppm, but is not limited to the concentration in this range (see Fig. 7(B)).

After the concentration of chlorine dioxide gas in the medical device accommodating portion 80 reaches the desired concentration by the first processing element, the vent opening 88 of the first processing element is closed, and the oxidizing opening is opened. The venting port 91 of the chlorine gas processing element and the medical device accommodating portion is subjected to ultraviolet rays irradiated to the steel wool 92 in a wet state by the ultraviolet ray irradiation element 93, and is lowered to a low concentration of chlorine dioxide gas as shown in Fig. 7 (C). The arrows in the figure circulate and come into contact with them to reduce the concentration of chlorine dioxide gas (refer to Fig. 7(C)).

The processing time of the chlorine dioxide gas generating element 81, the processing time of the first processing element 82, and the chlorine dioxide gas processing structure 83 may be determined by the size of the medical device housing unit 80, or may be determined by The timer control is separately driven, and the chlorine dioxide gas concentration detecting element omitted in the drawing may be disposed in the medical device housing portion 80 of the sterilizing device, and the chlorine dioxide gas generating element 81 may be sequentially driven according to the detection result. The first processing element 82 and the chlorine dioxide gas treatment structure 83. Among them, the output of the ultraviolet ray irradiation element, the capacity of the activated carbon filter, and the quality of the steel wool may be appropriately selected.

(other)

In the above-described embodiments, the specific dimensions, outputs, and positions are shown and described, but the present invention is not limited thereto, and may be modified without departing from the spirit and scope of the invention.

‧ In this embodiment, chlorine dioxide gas is produced by using stabilized chlorine dioxide, but is not limited thereto.

‧ All the points of the embodiments disclosed herein are examples and should not be considered as limiting. The technical scope of the present invention is not limited to the above description, and is intended to include all modifications within the meaning and scope of the scope of the patent application.

100‧‧‧ chlorine dioxide gas treatment unit

10‧‧‧1st processing component

20‧‧‧ chlorine dioxide gas treatment structure

30‧‧‧Introduction of air

40‧‧‧Intermediate air treatment

50‧‧‧Draining air

11‧‧‧Active carbon filter

12‧‧‧ Container

13‧‧‧Fan

14‧‧‧ arrow

15‧‧‧Detecting the suction port

16‧‧‧Detection tube for chlorine dioxide gas

21‧‧‧ Steel wool

22‧‧‧ Container

23‧‧‧Fan

24‧‧‧UV illumination components

25‧‧‧ arrow

26‧‧‧Water storage tray

27‧‧‧ Concentration detection location

28‧‧‧Aluminum foil

Claims (8)

A chlorine dioxide gas treatment structure for reducing a chlorine dioxide gas treatment structure of chlorine dioxide gas in a treated air containing chlorine dioxide gas, comprising: a space for circulating the treated air, a gas flow Producing a component, a contact layer, and an ultraviolet ray illuminating element, wherein the contact layer is a contact layer of a steel wool which is fixed by a wire made of iron and is wetted by water, and the airflow generating component circulates the air to be treated in the space Further, in the state where the ultraviolet ray irradiation element irradiates ultraviolet rays to the contact layer on the circulation path of the air to be treated, the air to be treated is repeatedly brought into contact with the contact layer. The chlorine dioxide gas treatment structure according to claim 1, wherein the filament has a diameter of 0.02 mm to 0.04 mm. The chlorine dioxide gas treatment structure according to claim 1 or 2, wherein the ultraviolet ray reflecting surface is provided on an inner surface of the space to which the ultraviolet ray irradiation element is irradiated. The chlorine dioxide gas treatment structure according to claim 1 or 2, which is provided with a wetting element for moistening the steel wool with water. A chlorine dioxide gas treatment device for reducing chlorine dioxide gas contained in a treated air after air purification by chlorine dioxide gas, comprising: The first treatment element of the chlorine dioxide gas is reduced to a desired concentration; and the chlorine dioxide gas treatment knot as described in any one of claims 1 to 4 The first processing element includes a first airflow generating element and an activated carbon filter, and the chlorine dioxide gas in the air to be treated is adsorbed to the activated carbon filter by the first airflow generating element. After the first treatment, the chlorine dioxide gas contained in the air to be treated after the first treatment is reduced by the chlorine dioxide gas treatment structure. A chlorine dioxide gas treatment device for reducing chlorine dioxide gas contained in a treated air after air purification by chlorine dioxide gas, comprising: And a chlorine dioxide gas treatment structure according to any one of claims 1 to 4, wherein the first processing element has a first 1 a gas generating element, an ultraviolet ray illuminating element, and a steel wool which is fixed as a contact layer by a wire made of iron, and in a state where the contact layer is irradiated with ultraviolet rays by the ultraviolet ray irradiation element, The first airflow generating element performs a first treatment in which the chlorine dioxide gas in the air to be treated is circulated and comes into contact with the contact layer, and the chlorine dioxide gas treatment structure is used to reduce the first treatment. The chlorine dioxide gas contained in the treated air. A sterilizing device, which is a sterilizing device for contacting a medical device with chlorine dioxide gas for sterilizing treatment, which is provided with the chlorine dioxide gas treating structure according to any one of claims 1 to 4. . An environmental purification device is an environmental purification device that introduces chlorine dioxide gas into a closed environment provided with an air purification device, and contacts an object in the environment with the chlorine dioxide gas for purification treatment, and the system includes: For example, the scope of patent application is 1 The chlorine dioxide gas treatment structure according to any one of the four items.