JP2021029541A - Microbicide gasification device and microbicide gasification method - Google Patents

Abstract

To provide a microbicide gasification device and a microbicide gasification method, capable of ensuring the gasification of a microbicide and an increased microbicide concentration in the gas, and achieving a compact structure.SOLUTION: A microbicide gasification device has a spiral metal pipe, a molten metal solidified layer that coats the spiral metal pipe by casting, a heating body that heats the outer surface of the molten metal solidified layer, and a nozzle that is provided at one end of the spiral metal pipe and sprays a microbicide into the spiral metal pipe.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fungicide gasifier and a fungicide gasification method used for sterilizing packaging materials in an aseptic filling and packaging machine to generate a fungicide gas.

Foods and beverages are filled and distributed in various containers by a sterile filling and packaging machine, such as portion milk, beverages in brick-type liquid paper containers, soups in pouches, beverages in cups, and beverages in plastic bottles such as PET. .. An aseptic filling and packaging machine is a device that fills a container sterilized in an aseptic atmosphere with sterilized contents and seals the container. Products produced by aseptic filling and packaging machines can be distributed and stored at room temperature, so they consume less energy than refrigerated and frozen products and have a good taste, so they are on the increase.

In the aseptic filling and packaging machine, the packaging material used as the container is various as described above, and the sterilization method differs depending on the packaging material. There is also a method of irradiating with ultraviolet rays or electron beams, but the method of sterilizing the surface of the packaging material with a bactericidal agent is the mainstream. Furthermore, when the packaging material is sterilized using a sterilizing agent, the portion milk or the brick paper pattern container is sterilized by immersing it in the sterilizing agent, but there is also a method of spraying the sterilizing agent. Packaging materials that are flat and do not interfere with the relatively high drying temperature after immersion are immersed and sterilized. Molded containers such as cups and bottles and packaging materials such as films that stretch when dried at high temperatures are sterilized by spraying with a disinfectant.

Large droplets of fungicide to be sprayed may drip on the sides of cups and bottles. The smaller the droplet of the disinfectant to be sprayed, the more evenly it is applied to the surface of the packaging material, and the higher the disinfecting effect. Therefore, a method of atomizing droplets of a fungicide has been proposed (Patent Document 1).

The smaller the droplets of the disinfectant adhering to the surface of the packaging material and the denser the surface of the packaging material is covered with the droplets of the disinfectant, the higher the bactericidal effect. Therefore, instead of spraying droplets of the disinfectant, a method has been proposed in which the disinfectant is gasified and the gasified disinfectant is sprayed on the surface of the packaging material to condense the disinfectant on the surface of the packaging material. (Patent Document 2). The gasification of the disinfectant is carried out by dropping the disinfectant onto a heated heating element.

Further, a method has been proposed in which a large amount of gasification of the fungicide is efficiently performed by spraying the fungicide into the heated pipe (Patent Document 3). Further, a method of providing a heat storage body in a heated pipe has also been proposed (Patent Document 4).

The sterilizing agent vaporizer described in FIGS. 5 and 6 of Patent Document 3 sprays the sterilizing agent into a heated cylinder. Further, a gasifier for a sterilizing solution has also been proposed in which a sterilizing solution is sprayed into a heated cylinder, hot air is blown from the upstream, and a plate heater is provided at the lower part of the cylinder (Patent Document 5). A device has also been proposed in which a hydrogen peroxide solution is injected and applied to the surface of a heating device while supplying a gas medium into a cylinder to vaporize and discharge the hydrogen peroxide solution (Patent Document 6).

The disinfectant gasifier described above gasifies the disinfectant by bringing the disinfectant into contact with a relatively large heated cylindrical tube or surface of the heated housing. At this time, some blow hot air. In addition, a device for gasifying by injecting or spraying a disinfectant into a relatively narrow heated flow path has also been proposed. Patent Document 7 inserts a coil spring between a heated outer cylinder and an inner swivel body, and vaporizes it by flowing a bactericide in a spiral space formed by the coil spring. Further, Patent Document 8 proposes a device for spraying a disinfectant into a circumferential groove and gasifying the disinfectant by flowing through a plurality of heated pipelines extending from the groove to the lower part.

Hydrogen peroxide solution is used as the disinfectant, but hydrogen peroxide is decomposed by a small amount of heavy metals contained in the hydrogen peroxide solution. To prevent this, sodium pyrophosphate and orthophosphoric acid, which have been confirmed to be safe and effective as stabilizers, are added to the hydrogen peroxide solution used for sterilization in aseptic filling and packaging machines (patented). Document 9). Such a stabilizer is precipitated when the hydrogen peroxide solution is gasified, and is deposited on the surface of the heated body to be gasified to reduce the efficiency of gasifying the hydrogen peroxide solution, or the hydrogen peroxide solution. It may block the nozzle that blows the gas of hydrogen peroxide onto the object to be sterilized. In order to prevent such harmful effects due to the precipitation of the stabilizer, a method has been proposed in which the hydrogen peroxide solution is once gasified, the gas is cooled and passed through a filter, and the liquefied hydrogen peroxide solution is further gasified. (Patent Document 10)

Japanese Unexamined Patent Publication No. 60-220067 Japanese Unexamined Patent Publication No. 63-1163 Japanese Unexamined Patent Publication No. 3-224469 Japanese Unexamined Patent Publication No. 10-218134 Japanese Unexamined Patent Publication No. 2001-276189 Special Table 2010-534167 Japanese Unexamined Patent Publication No. 62-12926 Japanese Patent Application Laid-Open No. 2005-503206 Japanese Unexamined Patent Publication No. 2006-240996 Japanese Unexamined Patent Publication No. 10-258811

Gasified hydrogen peroxide solution is often used to sterilize packaging materials in aseptic filling and packaging machines. The hydrogen peroxide solution is gasified by bringing the hydrogen peroxide solution into contact with the surface of the heated heating element. There is also a method of blowing hot air onto the sprayed hydrogen peroxide solution, but it is difficult to completely gasify the hydrogen peroxide solution because the hot air has a small heat capacity. The hydrogen peroxide solution sprayed inside the cylindrical tube is gasified by coming into contact with the heated inner surface of the cylindrical tube. There is also a hydrogen peroxide solution that is sprayed onto a container that is a sterilized object in a droplet state without contacting the inner surface of the cylindrical tube with the sprayed hydrogen peroxide solution.

When the sprayed hydrogen peroxide solution is completely gasified, the gasified hydrogen peroxide comes into contact with bacteria on the surface of the container or flat packaging material before forming the container, and is gasified. The hydrogen peroxide solution is condensed on the surface of the container to form fine droplets, and the hydrogen peroxide solution is gasified again by subsequent heating, so that the bactericidal effect is enhanced. That is, completely gasifying the hydrogen peroxide solution and thereby increasing the concentration of hydrogen peroxide contained in the gas enhances the bactericidal effect.

In order to increase the gasification rate of the hydrogen peroxide solution, the surface area of the cylindrical tube should be increased with respect to the sprayed hydrogen peroxide solution, and all the droplets of the hydrogen peroxide solution should be placed on the surface of the heated heating element. It is effective to make contact. However, even if the cylindrical tube is lengthened, the hydrogen peroxide solution once gasified may be recondensed in the cylindrical space, and it is difficult to completely gasify it. Further, even if the cylindrical tube is made thicker, the sprayed hydrogen peroxide solution may not reach the inner surface of the cylindrical tube. Making the cylindrical tube longer and thicker in this way makes the gasifier larger, which is not preferable for the aseptic filling machine.

On the other hand, the gasifiers proposed in Patent Documents 7 and 8 gasify the hydrogen peroxide solution by passing the hydrogen peroxide solution through the spiral groove or the pipeline. Since the surface area of the heated heating element with respect to the sprayed hydrogen peroxide solution is larger than that of the gasifier composed of a cylindrical tube, it is estimated that the gasification rate of the hydrogen peroxide solution is higher. However, all of them have a complicated structure and are expensive to manufacture.

The present invention has been made to solve the above problems, and the disinfectant is surely gasified by increasing the chance of contact of the disinfectant that has become small droplets by spraying with the heated heating element. It is an object of the present invention to provide a gasification device for a disinfectant and a method for gasifying the disinfectant, which can be gasified, can increase the concentration of the disinfectant in the gas, have excellent maintainability, and are compact.

When a hydrogen peroxide solution is used as the disinfectant, the stabilizer contained in the hydrogen peroxide solution is deposited on the inner surface of the gasifier and is deposited on the surface of the heated heating element. The deposited stabilizer hinders heat conduction to the outermost surface of the heated heating element and reduces the gasification efficiency of the hydrogen peroxide solution. In order to eliminate this, the gasifier of the disinfectant must be disassembled and cleaned on a regular basis, which hinders productivity. According to the present invention, by suppressing the manufacturing cost, it is possible to replace the gasified portion of the gasifier in which the stabilizer is deposited by using it for a certain period of time without disassembling and cleaning it.

The disinfectant gasifier according to the present invention includes a spiral metal pipe, a molten metal solidifying layer that covers the spiral metal pipe by a casting method, and a heating body that heats the outer surface of the molten metal solidifying layer. One end of the spiral metal pipe is provided with a nozzle for spraying a bactericide into the spiral metal pipe.

Further, in the gasifier of the disinfectant according to the present invention, it is preferable that the spiral metal pipe is made of stainless steel.

Further, in the gasifier of the disinfectant according to the present invention, it is preferable that the spiral direction of the spiral metal pipe is changed at least once.

Further, in the gasification device for the disinfectant according to the present invention, it is preferable that the molten metal solidified layer is brass, aluminum or an aluminum alloy.

Further, in the bactericide gasification device according to the present invention, it is preferable that the molten metal solidifying layer and the heating body for heating the outer surface of the molten metal solidifying layer are made of the same material.

Further, in the gasification device for the bactericide according to the present invention, it is preferable that the molten metal solidified layer covers the inside from the outer circumference of the spiral metal pipe and is provided in a columnar shape.

Further, in the gasification device for a disinfectant according to the present invention, it is preferable that the molten metal solidified layer covers the outer circumference and the inner circumference of the spiral metal pipe and is provided in a cylindrical shape.

Further, in the disinfectant gasifier according to the present invention, it is preferable to spray the disinfectant into the spiral metal pipe by a two-fluid spray.

Further, in the disinfectant gasification device according to the present invention, it is preferable to provide a cleaning liquid inflow device for flowing the cleaning liquid into the spiral metal pipe.

Further, in the disinfectant gasifier according to the present invention, a branch pipe is provided at the disinfectant gas outlet from which the disinfectant gas gasified by the spiral metal pipe is ejected from the spiral metal pipe. , It is preferable to provide any one or more of a hydrogen peroxide gas concentration meter, a thermometer, and a conductivity meter.

The method for gasifying the bactericide according to the present invention includes a spiral metal pipe, a molten metal solidifying layer that covers the spiral metal pipe by a casting method, and a heating body that heats the outer surface of the molten metal solidifying layer. It is characterized in that a bactericide is sprayed into the spiral metal pipe at one end of the spiral metal pipe.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable that the spiral metal pipe is made of stainless steel.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable to change the spiral direction of the spiral metal pipe at least once.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable that the molten metal solidified layer is made of brass, aluminum or an aluminum alloy.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable that the heated body that heats the outer surface of the molten metal solidified layer and the molten metal solidified layer is made of the same material.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable that the molten metal solidified layer covers the inside from the outer circumference of the spiral metal pipe to form a columnar shape.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable that the molten metal solidified layer covers the outer circumference and the inner circumference of the spiral metal pipe to form a cylindrical shape.

Further, in the method for gasifying a disinfectant according to the present invention, it is preferable to spray the disinfectant into the spiral metal pipe with a two-fluid spray.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable to flow a cleaning liquid into the spiral metal pipe.

Further, in the method for gasifying a bactericide according to the present invention, it is preferable to use water used for the cleaning liquid by ion exchange, reverse osmosis filtration or distillation.

Further, in the method for gasifying a bactericide according to the present invention, after flowing the cleaning liquid through the spiral metal pipe, rinsing the cleaning liquid with water, air is blown to the spiral metal pipe. It is preferable to remove the residual water.

The disinfectant gasifier according to the present application includes a spiral metal pipe, a molten metal solidifying layer that covers the spiral metal pipe by a casting method, a heating body that heats the outer surface of the molten metal solidifying layer, and the above. A nozzle for spraying a disinfectant into the spiral metal pipe is provided at one end of the spiral metal pipe to surely gas the disinfectant sprayed into the spiral metal pipe. Can be transformed into. Therefore, it is possible to increase the concentration of the bactericidal agent in the gas, and it is possible to enhance the bactericidal effect. Furthermore, by reliably gasifying the disinfectant, the gasified disinfectant condenses on the surface of the container to form fine droplets, and the disinfectant is regasified by subsequent heating to enhance the bactericidal effect. ..

Further, since the gasification device for the disinfectant according to the present application is inexpensive to manufacture, when hydrogen peroxide solution is used as the disinfectant, the stabilizer contained in the hydrogen peroxide solution is made of a spiral metal. When it seems that it has deposited in the pipe, it is possible to replace the gasified part of the gasifier in which the stabilizer has deposited after a certain period of time without disassembling and cleaning it, and aseptically filling it. The productivity of the machine can be increased.

Further, since the gasifier of the bactericide according to the present application is a metal pipe having a spiral shape inside, the cleaning effect and rinsing property of the cleaning liquid are superior to those of the conventional cylindrical gasifier, and the rinsing property is short. It is possible to efficiently remove stabilizers and rinse chemicals.

It is a side view which shows Embodiment 1 of the gasification apparatus of the disinfectant which concerns on this invention. It is a top view which shows Embodiment 1 of the gasification apparatus of the disinfectant which concerns on this invention. It is a perspective view which shows the spiral metal pipe of the gasifier of a disinfectant which concerns on this invention. It is a perspective view which shows the other spiral metal pipe of the gasifier of the disinfectant which concerns on this invention. It is a side view which shows Embodiment 2 of the gasification apparatus of the disinfectant which concerns on this invention. It is a top view which shows Embodiment 2 of the gasification apparatus of the disinfectant which concerns on this invention. It is a side view which shows the state which provided the cleaning liquid inflow device in Embodiment 1 of the gasification device of the disinfectant which concerns on this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows the first embodiment of the disinfectant gasifier 1 according to the present invention. The disinfectant gasifier 1 includes a spiral metal pipe 2, a molten metal solidifying layer 3 that covers the spiral metal pipe 2 by a casting method, and a heating body 4 that heats the outer surface of the molten metal solidifying layer 3. One end of the spiral metal pipe 2 is provided with a nozzle 5 for spraying a bactericide into the spiral metal pipe 2.

A nozzle 5 provided at one end of the spiral metal pipe 2 heated by a heating body 4 that heats the outer surface of the molten metal solidified layer 3 that covers the outer periphery of the spiral metal pipe 2 by a casting method. The disinfectant can be gasified by spraying the disinfectant into the spiral metal pipe 2. When the disinfectant sprayed on the inner surface of the heated spiral metal pipe 2 comes into contact with the disinfectant, the disinfectant is vaporized and gasified.

As shown in FIG. 2, the spiral metal pipe 2 is a metal pipe processed into a spiral shape. The metal may be any metal having a melting point higher than the melting temperature of the material forming the molten metal solidified layer 3. For example, iron, stainless steel, copper, brass, brass and the like, but stainless steel having good durability against disinfectants is preferable.

The process of processing a metal pipe into a spiral shape is to spray the disinfectant inside the metal pipe and to gasify the sprayed disinfectant as long as possible in a limited space. This is to secure. The spiral metal pipe 2 is heated from the outside, and the sprayed disinfectant passes through the heated spiral metal pipe 2 to ensure that the disinfectant is gasified.

The spiral metal pipe 2 is a metal pipe having an inner diameter of 3 to 30 mm and a thickness of 0.5 mm to 5 mm processed into a spiral shape. The diameter of the spiral is appropriately 30 mm to 200 mm with respect to the center of the metal pipe. Further, the length of the spiral shape is appropriately 50 mm to 500 mm. Further, the total length of the spiral metal pipe 2 is preferably 500 mm to 5000 mm. A nozzle 5 is connected to one end of the spiral metal pipe 2. Further, the other end is a disinfectant gas outlet 6 from which a gasified disinfectant gas is ejected.

As shown in FIG. 4, the spiral metal pipe 2 may change the spiral direction at least once. By changing the spiral direction, the flow of the disinfectant in the spiral metal pipe 2 is changed, and small droplets of the non-gasified disinfectant come into contact with the inner surface of the spiral metal pipe 2. Gasification of fungicides progresses.

The spiral metal pipe 2 is covered with molten metal. As shown in FIG. 1, the spiral metal pipe 2 is covered with a molten metal solidified layer 3 that covers the outer periphery of the spiral pipe. With the outer wall of the side surface 5 mm to 30 mm outside the outer peripheral end of the spiral-shaped pipe, molten metal is poured into the entire inner peripheral side of the spiral-shaped metal pipe 2 in a columnar shape, and the spiral metal pipe 2 is d. The entire spiral-shaped portion is covered with molten metal, leaving one end portion, and after the molten metal solidifies, the molten metal solidified layer 3 is formed.

As the molten metal, a metal having a relatively low melting point is suitable as a metal such as brass, aluminum, zinc, magnesium, and an aluminum alloy. In particular, brass, aluminum, and aluminum alloys are suitable because of their strength and thermal conductivity. Aluminum has a melting point of about 660 ° C., and aluminum alloys have a lower melting point. The molten metal solidified layer 3 is obtained by melting aluminum and an aluminum alloy, pouring it into a mold holding a spiral metal pipe 2, and cooling and solidifying it.

As a method of melting an aluminum or an aluminum alloy and pouring it into a mold, there is a casting method or a die casting method. Casting methods include sand casting, mold casting, and low-pressure casting. In addition, the die casting method includes a normal die casting method, a squeeze casting method, and a vacuum die casting method. Either method may be used, but an inexpensive sand casting method may be used because strict dimensional accuracy is not required.

At one end of the spiral metal pipe 2, a nozzle 5 for spraying a disinfectant into the spiral metal pipe 2 is provided. The nozzle 5 may be any nozzle 5 as long as the disinfectant can be sprayed into the spiral metal pipe 2. However, the nozzle 5 is preferably a two-fluid spray. When the nozzle 5 is a two-fluid spray, the disinfectant is supplied to the nozzle 5 from the disinfectant supply port, and the compressed air is supplied from the compressed air supply port. The disinfectant becomes mist from the nozzle 5 and is sprayed on the inner surface of the spiral metal pipe 2. The sprayed disinfectant is gasified by coming into contact with the inner surface of the spiral metal pipe 2 heated by the heat conducted from the heating body 4 through the molten metal solidifying layer 3. The gasified disinfectant is ejected as gas from the disinfectant gas outlet 6. The ejection is due to the pressure of the compressed air supplied to the nozzle 5 and the volume expansion when the disinfectant is gasified.

In FIG. 1, the nozzle 5 and the disinfectant gas outlet 6 are provided in the center of the spiral portion of the spiral metal pipe 2, but may be located along the spiral shape.

As the operating conditions of the nozzle 5, for example, the pressure of the compressed air is adjusted in the range of 0.05 MPa to 0.8 MPa, and the air flow rate is 10 L / min. ~ 500 L / min. , Preferably 30 L / min. ~ 300 L / min. Is appropriate. 10 L / min. If it is less than, it becomes difficult to attach the disinfectant to the bottom of the container when the disinfectant is blown into the inside of the container from the mouth of the container passing under the disinfectant gas outlet 6. In addition, the adhesion distribution of the bactericidal agent in the container is poor, and the bactericidal effect varies. In order to avoid this, a spray nozzle provided at the tip of the disinfectant gas outlet 6 may be inserted into the container, but the apparatus becomes complicated and the cost is high. On the other hand, the air flow rate is 500 L / min. If the above is reached, the concentration of the bactericidal agent will be reduced, and the bactericidal agent will be excessively supplied to compensate for this, resulting in inefficiency. The disinfectant may be dropped by gravity, may be provided with a pump to apply pressure, or may be pumped by pressurized air. The supply amount of the disinfectant can be freely set, for example, 1 g / min. ~ 200 g / min. Supply within the range of.

The disinfectant preferably contains at least hydrogen peroxide. The content is appropriately in the range of 0.5% by mass to 65% by mass. If it is less than 0.5% by mass, the bactericidal activity may be insufficient, and if it exceeds 65% by mass, it becomes difficult to handle for safety. Further, more preferable is 0.5% by mass to 40% by mass, and when it is 40% by mass or less, it is easier to handle, and the concentration is low, so that the residual amount of hydrogen peroxide in the packaging material after sterilization is reduced. it can.

The disinfectant also contains a stabilizer to prevent the decomposition of hydrogen peroxide. As the stabilizer contained in the disinfectant, it is preferable to use sodium pyrophosphate or orthophosphoric acid, which is used as a designated additive for food by the Minister of Health, Labor and Welfare to sterilize packaging materials for food. However, a phosphorus-containing inorganic compound such as sodium hydrogen pyrophosphate, a phosphonic acid chelating agent such as aminotrimethylphosphonate alkylidendiphosphonate, or the like may be used. The content of the stabilizer is usually 40 ppm or less, but some have a low content of 10 ppm or less.

The bactericidal agent contains water, but is one or two of alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, normal propyl alcohol and butyl alcohol, ketones such as acetone, methyl ethyl ketone and acetyl acetone, and glycol ether. It may contain more than seeds.

Further, the bactericidal agent may contain additives having a bactericidal effect such as peracetic acid, acetic acid, chlorine compounds and ozone, and additives such as cationic surfactants and nonionic surfactants.

The nozzle 5 may be directly connected to the spiral metal pipe 2, but an extension pipe may be provided between the spiral metal pipe 2 and the nozzle 5. The extension pipe is provided so that the heat of the spiral metal pipe 2 is conducted to the nozzle 5 and the temperature of the main body of the nozzle 5 does not rise.

The disinfectant gas ejected from the disinfectant gas outlet 6 may be directly sprayed onto the container or other packaging material to be sterilized, but is gasified in the spiral metal pipe 2 and is gasified in the disinfectant gas outlet. The disinfectant gas ejected from No. 6 may be mixed with heated air heated by a blower by a heating device in a conduit, and the mixed disinfectant gas may be sprayed onto a container or other packaging material to be sterilized. .. The number of gasifiers for the disinfectant is not one, and a plurality of disinfectant gasifiers may be connected to the conduit. The heating device heats the air from 130 ° C. to 300 ° C.

Further, it is desirable to provide a filter at the disinfectant gas outlet 6 to capture the precipitated stabilizer. Although a stabilizer having no problem in hygiene is used, it may adhere to the disinfectant gas outlet 6 and block the disinfectant gas outlet 6. The filter has a heat resistance up to 300 ° C. and is a precipitated stabilizer, such as a ceramic filter having an average fine diameter of 0.1 μm to 20 μm such as alumina, zirconium oxide, and titanium oxide, and a non-woven fabric made of an inorganic substance, cellulose, or the like. Anything can be used as long as it can capture.

Further, a branch pipe may be provided at the disinfectant gas outlet 6, and a hydrogen peroxide gas concentration meter, a thermometer, or a conductivity meter may be installed. By providing a hydrogen peroxide gas concentration meter and a thermometer, it is possible to measure the gas concentration of hydrogen peroxide required for sterilization and the gas temperature of the sterilizer at all times or unsteadily. Since hydrogen peroxide gas concentration meters generally lack heat resistance, it is preferable to lower the gas temperature to less than 100 ° C and measure the hydrogen peroxide gas concentration to 20 mg / L (preferably 10 mg / L). Is. Further, the advantage of installing the conductivity meter is that after cleaning the inside of the disinfectant gasifier 1 with a cleaning liquid containing a chemical, it can be confirmed that there is no residual chemical in the rinsing step with water.

A heating body 4 for heating the outer surface of the molten metal solidifying layer 3 is provided on the outside of the molten metal solidifying layer 3. The heating body 4 is preferably a cast heater processed so as to be in contact with the outer surface of the molten metal solidified layer 3. Further, any method may be used as long as it can be heated to a desired temperature, such as heating the heating body 4 itself by passing an electric current through the plate-shaped heater and the heating body 4, or heating by an induction heating device. The heating body 4 is heated from 130 ° C. to 500 ° C. An exterior may be provided on the outside of the heating body 4 for heat insulation.

As the material of the heating body 4, a material having a relatively low melting point as a metal such as brass, aluminum, zinc, magnesium, and an aluminum alloy is suitable. In particular, brass, aluminum, and aluminum alloys are suitable because of their strength and thermal conductivity. Aluminum has a melting point of about 660 ° C, and aluminum alloys have a lower melting point. The heated body 4 is obtained by melting aluminum and an aluminum alloy, pouring it into a mold holding a heater wire, and cooling and solidifying it.

When the heating body 4 is heated to 130 ° C. or higher, aluminum and other metals also undergo adiabatic expansion. Therefore, it is preferable that the heated body 4 and the molten metal solidified layer 3 are made of the same material, and this makes it possible to reduce the gap between the heated body 4 and the molten metal solidified layer 3 even when heated.

By heating the heating body 4 from 130 ° C. to 500 ° C., the inner surface of the spiral metal pipe 2 can be maintained at 130 ° C. to 400 ° C. when the disinfectant is sprayed. When the disinfectant contains 35% by mass of hydrogen peroxide, the concentration of hydrogen peroxide contained in the disinfectant gas is 200 mg / L to 500 mg / L.

By heating the spiral metal pipe 2 by the heating body 4, it is possible to reliably heat up to the disinfectant gas outlet 6, and the disinfectant gas outlet is compared with the conventional cylindrical gasifier. The sterilizing agent gasified in the spiral metal pipe 2 can maintain the gas state and spray the sterilizing agent on the object to be sterilized without liquefying in the vicinity of 6.

When the spiral metal pipe 2 of the disinfectant gasifier 1 is used for a long time, the stabilizer contained in the hydrogen peroxide solution is precipitated, and the inside of the spiral metal pipe 2 or the disinfectant gas is sprayed. There is a risk of accumulation at outlet 6. The accumulated stabilizer hinders heat conduction to the surface of the spiral metal pipe 2 and reduces the gasification efficiency of the fungicide. Further, when the accumulation is excessive, there is a risk of corroding the stainless steel pipe, and there is a risk of blocking the inside of the spiral metal pipe 2 or the disinfectant gas outlet 6. The portion composed of the spiral metal pipe 2 and the molten metal solidified layer 3 of the present invention is relatively inexpensive, and after being used for a certain period of time, it can be replaced and the nozzle 5 and the heating body 4 can be reused. It is not necessary to clean the gasifier as in the conventional case, and the aseptic filling machine can be restarted in a short time.

Further, in order to extend the replacement period of the portion composed of the spiral metal pipe 2 and the molten metal solidified layer 3 for a long period of time, it is preferable to clean the inside of the spiral metal pipe 2.

In the disinfectant gasifier 1 according to the present application, since the portion that vaporizes the disinfectant is a spiral metal pipe 2, the cleaning effect and rinsing property of the cleaning liquid are superior to those of the conventional cylindrical gasifier. ing. That is, it is possible to efficiently remove the stabilizer that precipitates in a short time and rinse the chemical used in the cleaning liquid. After the operation of the gasifier 1 is completed, a cleaning liquid containing an alkaline or acidic chemical is supplied to the nozzle 5 for spraying the disinfectant, and the cleaning liquid is sprayed into the spiral metal pipe 2 to remove the stabilizer. .. Then water is supplied and the drug is washed away. Water may be supplied before the cleaning solution containing the alkaline or acidic agent is supplied.

As the cleaning liquid containing an alkaline agent, one in which 0.5 to 5% by mass of sodium hydroxide and 0.1 to 5% by mass of a chelating agent are added to water is preferable. Immediately after the operation of the bactericide gasifier 1 is completed, the temperature inside the sterilizer gasifier 1 is as high as 50 ° C to 300 ° C. Therefore, if water is ion-exchanged, reverse osmosis filtered or distilled, calcium or magnesium is used. It is suitable because there is no precipitation such as. After rinsing with water, air is supplied from the nozzle 5 or the cleaning liquid inflow device 7, and the inside of the disinfectant gasifier 1 is blown with air to remove residual water. Since the residual water blown by air is blown into the aseptic filling machine, it is preferable to use aseptic air that has passed through a filter as the supplied air.

Further, as shown in FIG. 7, a cleaning liquid inflow device 7 for flowing the cleaning liquid into the spiral metal pipe 2 may be provided downstream of the nozzle 5. The cleaning liquid inflow device 7 causes the cleaning liquid to flow from the cleaning liquid storage tank 9 into the spiral metal pipe 2 by opening and closing the cleaning liquid inflow valve 8. The cleaning solution is an aqueous solution or water containing an alkaline or acidic chemical. It is preferable to use water that has been ion-exchanged, reverse osmosis-filtered, or distilled without precipitation of calcium, magnesium, or the like.

The cleaning liquid stored in the cleaning liquid storage tank 9 flows into the spiral metal pipe 2 by gravity, a pump, compressed air, or the like. After the spraying of the disinfectant is completed, the cleaning liquid flows into the spiral metal pipe 2 by opening the cleaning liquid inflow valve 8. A nozzle may be provided at the tip of the cleaning liquid inflow device 7, and the cleaning liquid may be sprayed into the spiral metal pipe 2.

(Embodiment 2)
FIG. 5 shows the second embodiment of the present invention. The outer and inner circumferences of the spiral metal pipe 2 are covered, and the molten metal solidified layer 3 has a cylindrical shape. In the first embodiment, the molten metal solidified layer 3 is cylindrical, but in the second embodiment, the molten metal solidified layer 3 is formed into a cylindrical shape, and the outer and inner surfaces of the molten metal solidified layer 3 are heated by heating. Provide body 4. In this case, the spiral diameter of the spiral metal pipe 2 is appropriately 100 mm to 300 mm with respect to the center of the spiral shape of the spiral metal pipe 2. That is, the spiral diameter is increased so that a space can be provided inside the spiral metal pipe 2. By providing the heating body 4 not only on the outside of the cylinder but also on the inside, the spiral metal pipe 2 can be efficiently heated. By increasing the amount of heat for heating the spiral metal pipe 2, the amount of the disinfectant supplied to the metal pipe 2 can be increased, and the amount of gas of the disinfectant for sterilizing the container can be increased.

FIG. 6 shows a cross section of the second embodiment of the present invention. The molten metal solidifying layer 3 covers the outer circumference and the inner circumference of the spiral metal pipe 2, and the heating body 4 is provided on the outer circumference and the inner circumference of the molten metal solidifying layer 3. By providing the heating body 4 on the outer circumference and the inner circumference of the molten metal solidified layer 3, the spiral metal pipe 2 can be heated from both sides. The spiral metal pipe 2 is heated from the inner and outer surfaces.

Although the present invention is configured as described above, the present invention is not limited to the above-described embodiment, and various modifications can be made within the gist of the present invention.

1 ... Disinfectant gasifier 2 ... Spiral metal pipe 3 ... Molten metal solidified layer 4 ... Heater 5 ... Nozzle 6 ... Disinfectant gas outlet 7 ... Cleaning liquid inflow device

In the disinfectant gasifier according to the present invention , the spiral metal pipe whose spiral direction is changed at least once, leaving the two ends of the spiral metal pipe, and the entire spiral-shaped portion. A bactericide is sprayed into the spiral metal pipe on one end of the molten metal solidified layer coated with the molten metal, a heating body for heating the outer surface of the molten metal solidified layer, and the spiral metal pipe. It is characterized by providing a nozzle .

Further, in the gasifier of the disinfectant according to the present invention, it is preferable that the spiral metal pipe is made of stainless steel.

The disinfectant gasifier according to the present invention is a molten metal solidified layer in which the spiral metal pipe and the spiral metal pipe are left at both ends and the entire spiral-shaped portion is covered with molten metal. , A heating body that heats the outer surface of the molten metal solidified layer, and a nozzle that sprays a bactericide into the spiral metal pipe at one end of the spiral metal pipe, and the molten metal solidified layer. It said heating element for heating the outer surface of the molten metal solidified layer, characterized in that the same material as.

The disinfectant gasifier according to the present invention is a molten metal solidified layer in which the spiral metal pipe and the spiral metal pipe are left at both ends and the entire spiral-shaped portion is covered with molten metal. , A heating body that heats the outer surface of the molten metal solidified layer, and a nozzle that sprays a bactericide into the spiral metal pipe at one end of the spiral metal pipe, and the molten metal solidified layer. There covers the outer periphery and the inner periphery of the helical metal pipe, and which are located in a cylindrical shape.

Further, in the disinfectant gasification device according to the present invention, it is preferable that the nozzle is a two-fluid spray.

The disinfectant gasifier according to the present invention is a molten metal solidified layer in which the spiral metal pipe and the spiral metal pipe are left at both ends and the entire spiral-shaped portion is covered with molten metal. , A heating body that heats the outer surface of the molten metal solidified layer, and a nozzle that sprays a bactericide into the spiral metal pipe at one end of the spiral metal pipe, and the spiral metal It is characterized in that a cleaning liquid inflow device for flowing the cleaning liquid is provided in the pipe.

The disinfectant gasifier according to the present invention is a molten metal solidified layer in which the spiral metal pipe and the spiral metal pipe are left at both ends and the entire spiral-shaped portion is covered with molten metal. , A heating body that heats the outer surface of the molten metal solidified layer, and a nozzle that sprays a bactericide into the spiral metal pipe at one end of the spiral metal pipe, and the spiral metal A branch pipe is provided at the disinfectant gas outlet from which the disinfectant gas gasified by the pipe is ejected from the spiral metal pipe, and either a hydrogen peroxide gas concentration meter, a thermometer, or a conductivity meter is provided. It is characterized by having one or more.

The method for gasifying the bactericide according to the present invention is a molten metal solidified layer in which the spiral direction is changed at least once, leaving two ends of the spiral metal pipe, and the entire spiral-shaped portion is covered with molten metal. The molten metal solidified layer is heated by a heating body provided on the outer surface of the molten metal solidified layer, and the spiral metal pipe is heated by the heat conducted through the molten metal solidified layer to heat the spiral metal. It is characterized in that a disinfectant is sprayed into the spiral metal pipe from one end of the pipe .

Further, in the method for gasifying a bactericide according to the present invention, it is preferable that the spiral metal pipe is made of stainless steel.

In the method for gasifying a bactericide according to the present invention, a molten metal solidifying layer is provided in which two ends of a spiral metal pipe are left and the entire spiral-shaped portion is covered with molten metal, and the molten metal solidifying layer is provided. The molten metal solidified layer is heated by a heating body provided on the outer surface of the metal, and the spiral metal pipe is heated by the heat conducted through the molten metal solidified layer, from one end of the spiral metal pipe. the spiral sprayed with fungicide in a metal pipe, characterized in that the same material heating element for heating the outer surface of the molten metal solidified layer and the molten metal solidification layers.

In the method for gasifying a bactericide according to the present invention, a molten metal solidifying layer is provided in which two ends of a spiral metal pipe are left and the entire spiral-shaped portion is covered with molten metal, and the molten metal solidifying layer is provided. The molten metal solidified layer is heated by a heating body provided on the outer surface of the metal, and the spiral metal pipe is heated by the heat conducted through the molten metal solidified layer, from one end of the spiral metal pipe. the spiral sprayed with fungicide in a metal pipe, the molten metal solidified layer covers the outer periphery and the inner periphery of the helical metal pipe, characterized by a cylindrical shape.

In the method for gasifying a bactericide according to the present invention, a molten metal solidifying layer is provided in which two ends of a spiral metal pipe are left and the entire spiral-shaped portion is covered with molten metal, and the molten metal solidifying layer is provided. The molten metal solidified layer is heated by a heating body provided on the outer surface of the metal, and the spiral metal pipe is heated by the heat conducted through the molten metal solidified layer, from one end of the spiral metal pipe. It is characterized in that a disinfectant is sprayed into the spiral metal pipe and a cleaning liquid is poured into the spiral metal pipe.

In the method for gasifying a bactericide according to the present invention, a molten metal solidifying layer is provided in which two ends of a spiral metal pipe are left and the entire spiral-shaped portion is covered with molten metal, and the molten metal solidifying layer is provided. The molten metal solidified layer is heated by a heating body provided on the outer surface of the metal, and the spiral metal pipe is heated by the heat conducted through the molten metal solidified layer, from one end of the spiral metal pipe. the spiral sprayed with fungicide in a metal pipe, water ion exchange to be used in the cleaning solution, characterized by using a material obtained by reverse osmosis filtration or distillation.

In the method for gasifying a bactericide according to the present invention, a molten metal solidifying layer is provided in which two ends of a spiral metal pipe are left and the entire spiral-shaped portion is covered with molten metal, and the molten metal solidifying layer is provided. The molten metal solidified layer is heated by a heating body provided on the outer surface of the metal, and the spiral metal pipe is heated by the heat conducted through the molten metal solidified layer, from one end of the spiral metal pipe. A bactericide is sprayed into the spiral metal pipe, the cleaning liquid is poured through the spiral metal pipe, the cleaning liquid is rinsed with water, and then air is blown to the spiral metal pipe. It is characterized by removing residual water.

The spiral metal pipe 2 is covered with molten metal. As shown in FIG. 1, the spiral metal pipe 2 is covered with a molten metal solidified layer 3 that covers the outer periphery of the spiral pipe. As the outer wall from an outer peripheral end side of the position of 5mm~30mm outer pipe of the spiral shape, the inner circumference side of all the molten metal in the spiral-shaped metal pipe 2 was poured into a cylindrical shape, spiral metal pipe 2 two The entire spiral-shaped portion is covered with molten metal, leaving one end portion, and after the molten metal solidifies, the molten metal solidified layer 3 is formed.

Claims (21)

A spiral metal pipe, a molten metal solidifying layer that covers the spiral metal pipe by a casting method, a heating body that heats the outer surface of the molten metal solidifying layer, and one end of the spiral metal pipe. A disinfectant gasifier, characterized in that a nozzle for spraying a disinfectant is provided in the spiral metal pipe. In the disinfectant gasifier according to claim 1,
A gasifier for a disinfectant, wherein the spiral metal pipe is made of stainless steel. In the disinfectant gasifier according to claim 1 or 2.
A gasifier for a disinfectant, wherein the spiral direction of the spiral metal pipe is changed at least once. In the disinfectant gasification device according to any one of claims 1 to 3.
A gasification device for a disinfectant, wherein the molten metal solidified layer is brass, aluminum, or an aluminum alloy. In the disinfectant gasification device according to any one of claims 1 to 4.
A gasifier for a disinfectant, wherein the molten metal solidified layer and the heating body that heats the outer surface of the molten metal solidified layer are made of the same material. In the disinfectant gasification device according to any one of claims 1 to 5.
A gasifier for a disinfectant, wherein the molten metal solidified layer covers the inside from the outer circumference of the spiral metal pipe and is provided in a columnar shape. In the disinfectant gasification device according to any one of claims 1 to 6.
A gasifier for a disinfectant, wherein the molten metal solidified layer covers the outer circumference and the inner circumference of the spiral metal pipe and is provided in a cylindrical shape. In the disinfectant gasification device according to any one of claims 1 to 7.
A gasifier for a disinfectant, wherein the nozzle is a two-fluid spray. In the disinfectant gasification device according to any one of claims 1 to 8.
A gasifier for a disinfectant, which comprises providing a cleaning liquid inflow device for flowing a cleaning liquid in the spiral metal pipe. In the disinfectant gasification device according to any one of claims 1 to 9.
A branch pipe is provided at the disinfectant gas outlet from which the gas of the disinfectant gasified by the spiral metal pipe is ejected from the spiral metal pipe, and a hydrogen peroxide gas concentration meter, a thermometer, and conductivity are provided. A gasifier for a bactericide, which comprises one or more of the rate meters. A spiral metal pipe, a molten metal solidifying layer that covers the spiral metal pipe by a casting method, a heating body that heats the outer surface of the molten metal solidifying layer, and one end of the spiral metal pipe. A method for gasifying a disinfectant, which comprises spraying a disinfectant into the spiral metal pipe. In the method for gasifying a disinfectant according to claim 11,
A method for gasifying a bactericide, which comprises making the spiral metal pipe made of stainless steel. In the method for gasifying a bactericidal agent according to claim 11 or 12.
A method for gasifying a disinfectant, which comprises changing the spiral direction of the spiral metal pipe at least once. The method for gasifying a bactericidal agent according to any one of claims 11 to 13.
A method for gasifying a disinfectant, which comprises forming the molten metal solidified layer into aluminum or an aluminum alloy. The method for gasifying a bactericidal agent according to any one of claims 11 to 14.
A method for gasifying a bactericide, which comprises using the same material as the heated body that heats the molten metal solidified layer and the outer surface of the molten metal solidified layer. The method for gasifying a bactericidal agent according to any one of claims 11 to 15.
A method for gasifying a bactericide, wherein the molten metal solidified layer covers the inside from the outer circumference of the spiral metal pipe to form a columnar shape. The method for gasifying a bactericidal agent according to any one of claims 11 to 16.
A method for gasifying a bactericide, wherein the molten metal solidified layer covers the outer circumference and the inner circumference of the spiral metal pipe to form a cylindrical shape. The method for gasifying a bactericidal agent according to any one of claims 11 to 17.
A method for gasifying a disinfectant, which comprises spraying the disinfectant onto the spiral metal pipe with a two-fluid spray. The method for gasifying a bactericidal agent according to any one of claims 11 to 18.
A method for gasifying a bactericide, which comprises flowing a cleaning liquid into the spiral metal pipe. In the method for gasifying a disinfectant according to claim 19,
A method for gasifying a bactericide, which comprises using water used for the cleaning liquid by ion exchange, reverse osmosis filtration or distillation. In the method for gasifying a bactericidal agent according to claim 19 or 20
A gas of a disinfectant, which comprises flowing the cleaning liquid through the spiral metal pipe, rinsing the cleaning liquid with water, and then blowing air through the spiral metal pipe to remove residual water. How to make it.

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