JP6130745B2 - Peracetic acid disinfectant solution processing equipment - Google Patents

Description

In the present invention, a bactericidal solution for sterilization of packaging material (hereinafter referred to as a packaging material) (hereinafter also referred to simply as a bactericidal agent) is transferred from a circulation tank to a packaging material sterilizer via a heating device. The present invention relates to an apparatus for treating a peracetic acid-based disinfectant solution that forms a circulation circuit that is supplied in a high temperature state and that recovers the disinfectant after sterilization of packaging material from the disinfecting machine to the circulation tank.

  Conventionally, a disinfectant for treating a disinfectant solution that forms a circulation circuit in which a disinfectant for disinfecting packaging material is supplied from a circulation tank to a disinfection machine and the disinfectant after disinfecting the packaging material is collected into the recirculation tank To increase the sterilization effect of the packaging material by supplying the sterilizer to the sterilizer at a high temperature, and to maintain the prescribed concentration by automatically replenishing the sterilizing agent so that the sterilizing power does not decrease as the concentration of the sterilizing agent decreases In addition, a device has been devised to add an additive to the bactericide and enhance the bactericidal power by reaction with the additive in the circulation tank.

The additive after enhancing the sterilizing power of the sterilizing agent by the reaction in the circulation tank becomes inactive in enhancing the sterilizing power. Therefore, the inactive substance is collected by an additive collecting filter, and a new additive is additionally introduced (for example, see Patent Document 1).
When the particles of the inactive material are fine, the additive collecting filter needs to have a fine filter part and is easily clogged. Therefore, there is a demand for a technique for preventing early clogging. It is growing.

JP 2012-200456 A

A conventional disinfectant solution processing apparatus will be described with reference to FIG.
FIG. 3 is a diagram schematically showing a conventional disinfectant solution processing apparatus.
In FIG. 3, a conventional disinfectant solution processing device 3 is configured such that a disinfectant having a predetermined concentration passes through a pipe P1 from a circulation tank 5 by a pump PA, and an additive collecting filter 3F, a heat exchange device 8, and a heating device. 6 is supplied to the sterilizer 4 at a predetermined high temperature state through 6 and sterilizes the packaging material (not shown) with the sterilizer 4, and then the sterilizer used for sterilization of the packaging material is once recovered in the recovery tank 7, It is a circulation circuit that is recovered to the circulation tank 5 via the heat exchange device 8 and the cooling device 9 on the way through the pipe P2 by the pump PB, and the heat exchange device 8 is used for sterilization of the packaging material by the sterilizer 4 The heat exchange is performed via the high-temperature sterilizing agent and the low-temperature sterilizing agent supplied from the circulation tank 5 to the heating device 6.
In addition, although it becomes the description which overlaps, the said filter 3F for additive collection is provided in the exit side of the circulation tank 5. FIG.

Further, the conventional disinfectant solution processing apparatus 3 is provided with a concentration measuring device (A) CA for measuring the concentration of the disinfectant passing through the pipe P2 on the upstream side pipe P2 of the circulation tank 5 to measure the concentration. A value is sent to the control device 10, and a concentration measuring device (B) CB for measuring the concentration of the disinfectant passing through the pipe P1 is provided on the upstream side pipe P1 of the sterilizer 4. The concentration measurement value is sent to the control device 10, and if the concentration measurement value by the concentration measurement device (A) CA or the concentration measurement device (B) CB is lower than a predetermined concentration, the control device 10 Is opened by the command from the control device 10, and the sterilizing agent having a concentration higher than the concentration used for sterilization is supplied from the sterilizing agent buffer tank 12 through the pipe P3 by the pump PC by the circulation tank 5. of It is configured to be automatically injected required amount mouth.
Further, as shown in the figure, a necessary amount of bactericidal agent or an additive to be described later can be injected into the circulation tank 5 from an arrow Q0 or an arrow Q1 as shown.

  Here, as an example, the bactericidal agent is a peracetic acid type bactericidal agent (for example, a mixed solution of 1500 PPM peracetic acid and 3000 PPM hydrogen peroxide solution. Hereinafter, the bactericidal agent may be referred to as a peracetic acid solution). To explain, a preparation tank 13 is provided upstream of the sterilizing agent buffer tank 12 and a peracetic acid solution stock solution that is a sterilizing agent stock solution (for example, 50 times the concentration of the peracetic acid solution used in the sterilizer 4). S0, clear water W for diluting the peracetic acid solution stock solution S0 to a predetermined concentration, and an additive for strengthening the sterilizing power of the peracetic acid solution (for example, an additive mainly composed of an enzyme capable of decomposing hydrogen peroxide) Agent) S1 is introduced so that the peracetic acid solution is prepared at a predetermined concentration and in a predetermined state, and the preparation tank 13 and the bactericidal buffer tank 12 are provided with an on-off valve V9. To have a connection configurations through a pipe P4.

Next, the operation of the conventional disinfectant solution processing apparatus 3 will be described.
In order to enhance the sterilizing effect of the peracetic acid solution that sterilizes the packaging material in the sterilizer 4, the peracetic acid solution that is a sterilizing agent is heated to a predetermined high temperature state by the heating device 6 immediately before being supplied to the sterilizer 4 ( 70 ° C as an example), but after sterilization of the packaging material, if the circulation tank 5 is left in a high temperature state (eg 65 ° C as an example) for a long time, the decomposition is accelerated and the concentration of the peracetic acid solution is increased. As a result, the sterilization effect is lowered, and the cooling tank 9 is cooled to a predetermined low temperature state (40 ° C. as an example) and collected in the circulation tank 5.
Here, the peracetic acid solution is heated in the high temperature state by the heat exchange device 8 on the way from the recovery tank 7 to the cooling device 9 and on the way from the low temperature circulation tank 5 to the heating device 6. The solution is deprived of heat to an intermediate temperature state (for example, 65 ° C. to about 50 ° C .; preliminary heat release), and the low-temperature peracetic acid solution is heated to an intermediate temperature state (for example, 40 ° C. to about 50 ° C.) Heat exchange (preheating) is performed, and thermal energy is effectively used.

  Further, since the peracetic acid solution is used for sterilization of the packaging material in a high temperature state in the sterilizer 4, a slight decomposition occurs. Therefore, the peracetic acid solution is obtained by the concentration measuring device (A) CA and the concentration measuring device (B) CB. By measuring the concentration of the solution, opening the on-off valve V1 according to a command from the control device 10, and automatically injecting a necessary amount of peracetic acid solution prepared in a predetermined state from the bactericide buffer tank 12, or When a necessary amount of a sterilizing agent having a predetermined concentration is injected from the illustrated arrow Q0, the circulating tank 5 is maintained at a predetermined concentration, and the sterilizing effect of the peracetic acid solution is maintained.

  Further, the peracetic acid-based disinfectant is added with an additive S1 mainly composed of an enzyme having an action of decomposing hydrogen peroxide in the circulation tank 5 to enhance the disinfecting power. In some cases, the action of decomposing hydrogen peroxide becomes inactive after reacting to enhance sterilizing power. Then, particles that have become inactive with respect to the enhancement of sterilizing power are collected by the additive collecting filter 3F on the outlet side of the circulation tank 5, and the concentration measuring device (A) CA and the concentration measuring device (B) CB. Based on the measured concentration value, a predetermined amount of additive S1 is injected according to a command from the control device 10, and the sterilizing power enhancing action is maintained.

  However, in the technology of the conventional disinfectant solution processing apparatus 3, the additive collecting filter 3F is provided on the outlet side of the circulation tank 5 and is at a low temperature in the circulation tank 5. The particles of the additive which became active are fine, and it is necessary to make the eyes of the filter part of the additive collecting filter 3F fine to collect the fine inert additive. There is a risk of clogging.

In view of the above-mentioned circumstances, the present invention provides a peracetic acid disinfectant solution processing apparatus that prevents early clogging of an additive collecting filter, prolongs filter replacement life, and reduces maintenance costs. It is aimed.

The present invention solves the above problems by the following means.
(1) The peracetic acid disinfectant solution processing apparatus of the first means has enhanced disinfecting power by reaction with an additive mainly composed of an enzyme having an action of decomposing hydrogen peroxide in a circulation tank. The peracetic acid-based disinfectant solution is supplied from the circulation tank to the sterilizer after being heated by the heating device, and the peracetic acid-based disinfectant solution after sterilizing the packaging material to be sterilized is transferred from the sterilizer to the cooling device. after the processing of the peracetic acid-based disinfectant solution to form a circulation circuit to be collected into the circulating tank device, or the peracetic acid-based disinfectant solutions with enhanced microbiocidal by reaction with the additive in circulation tank The peracetic acid-based disinfectant solution supplied from the circulation tank to the sterilizer after being heated by the heating device through the preheating in the heat exchange device and sterilizing the packaging material is transferred from the sterilizer to the heat exchange device. In preliminary heat dissipation and cooling equipment In the processing apparatus of the peracetic acid-based disinfectant solution to form a circulation circuit to be recovered to the circulation tank through the retirement, additives collecting filter for collecting said additive after reinforcing germicidal reaction, the heating device It is provided on the upstream side of the sterilizer on the downstream side, or on the upstream side of the heating device on the downstream side of the heat exchange device.

The present invention according to claim 1 is characterized in that the additive collecting filter is provided on the upstream side of the sterilizer on the downstream side of the heating device or on the upstream side of the heating device on the downstream side of the heat exchanger. When the agent is a peracetic acid-based disinfectant and the additive is an additive mainly composed of an enzyme having the action of decomposing hydrogen peroxide in the peracetic acid-based disinfectant, a reaction for enhancing the disinfecting power Since the additive particles that have become inactive after hydrogen peroxide decomposition have become thermally denatured or condensed by appropriate heating in a heating device or heat exchange device, The filter can be collected with a coarse filter, and the filter replacement life is increased.

The processing apparatus of disinfectant solutions according to the first embodiment of the present invention is a diagram schematically showing. In view of the processing apparatus of disinfectant solutions according to the second embodiment of the present invention shown schematically and is a view corresponding to FIG. The processing apparatus of a conventional disinfectant solutions is a diagram schematically showing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.
(First embodiment of the present invention)

A first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a diagram schematically showing a disinfectant solution processing apparatus according to a first embodiment of the present invention.
In FIG. 1, the same structure as that of FIG. 3 explained as the prior art is given the same symbol, and duplicate explanation is omitted.
In FIG. 1, the disinfectant solution processing apparatus 1 includes an additive collecting filter 1F provided downstream of the heating device 6 and upstream of the sterilizer 4, and filtering the additive collecting filter 1F. The eyes of the part are moderately rough.

Next, the operation of the disinfectant solution processing apparatus 1 according to the first embodiment of the present invention will be described.
First, according to the present invention, after an additive mainly composed of an enzyme capable of decomposing hydrogen peroxide reacts in the circulation tank 5 to enhance the sterilizing power of the peracetic acid-based sterilizing agent solution, the sterilizing power is increased. This is because the particles of the enzyme component of the additive, which became inactive for strengthening, were found to be enlarged by heat denaturation or condensation upon heating.

A peracetic acid-based disinfectant solution whose sterilizing power is strengthened by a reaction with an additive mainly composed of an enzyme capable of decomposing hydrogen peroxide in the circulation tank 5 is heated in a high temperature state (for example, 70 The sterilizing power of the packaging material (object to be sterilized) in the sterilizer 4 is enhanced.
In addition, the enzyme component particles, which are inactive to enhance the sterilizing power due to the reaction in the circulation tank 5, are heated and denatured or condensed by the heating device 6, and the additive collecting filter 1 </ b> F. When passing through the filter, it is collected even if the filter portion of the filter is moderately rough.
A filter having a coarse filter section is not easily clogged and has a long filter replacement life.
In the above description, the case where the heat exchange device 8 is provided has been described. However, even if the heat exchange device 8 is not provided, the gist of the present invention is the same, and detailed description thereof is omitted.

Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 2 is a diagram schematically showing a disinfectant solution processing apparatus according to the second embodiment of the present invention.
In FIG. 2, the same structure as that of FIG.
In FIG. 2, the disinfectant solution processing apparatus 2 includes an additive collecting filter 2F provided downstream of the heat exchange device 8 and upstream of the heating device 6, and filtering of the additive collecting filter 2F. The eyes of the part are moderately rough.

Next, the operation of the disinfectant solution processing apparatus 2 according to the second embodiment of the present invention will be described.
The peracetic acid-based disinfectant solution whose sterilizing power is enhanced by the reaction with an additive mainly composed of an enzyme capable of decomposing hydrogen peroxide in the circulation tank 5 is in a medium temperature state (as an example) When the enzyme component particles heated to 50 ° C. (preliminary heating) and deactivated to enhance the sterilizing power are enlarged by heat denaturation or condensation and pass through the additive collecting filter 2F, the filter Even if the eyes of the filtration part are moderately rough, they are collected.
A filter having a coarse filter section is not easily clogged and has a long filter replacement life.

  In the description of the first embodiment of the present invention, the case where the disinfectant solution is heated to a high temperature state (70 ° C. as an example) by the heating device 6 and then passes through the additive collecting filter 1F is described. In the description of the second embodiment of the present invention, the disinfectant solution is heated to an intermediate temperature state (for example, 50 ° C.) by the heat exchange device 8 and then passes through the additive collecting filter 2F. In the case of the enzyme as the main component of the additive that has the action of decomposing hydrogen peroxide, the particles of the enzyme component that became inactive for enhancing the bactericidal power after the reaction for enhancing the bactericidal power are In the case where heat denaturation or condensation tends to occur at 70 ° C., the first embodiment of the present invention is preferable, and the inactive enzyme component particles are heated in an intermediate temperature state (50 ° C. as an example). If it is easy to denature and condense, The second embodiment of preferred, can be appropriately selected.

  In the description of the second embodiment of the present invention, the case where the additive collecting filter is provided on the downstream side of the heat exchange device and the upstream side of the heating device has been described. Filters may be provided on both the upstream side of the sterilizer on the downstream side of the heating device and on the upstream side of the heating device on the downstream side of the heat exchange device. Since the particles of the enzyme component that have become inactive to enhance the bactericidal activity are collected by the collecting filter, the frequency of filter replacement can be reduced.

1, 2 Disinfectant solution processing equipment 1F, 2F Additive collecting filter 4 Sterilizer 5 Circulating tank 6 Heating device 8 Heat exchange device S0 Peracetic acid solution stock solution S1 Additive

Claims (1)

A peracetic acid-based disinfectant solution with enhanced sterilization power by reaction with an additive mainly composed of an enzyme capable of decomposing hydrogen peroxide in the circulation tank was heated from the circulation tank to the sterilizer with a heating device. A peracetic acid-based disinfectant solution that is supplied later and forms a circulation circuit in which the peracetic acid-based disinfectant solution after sterilizing the packaging material to be sterilized is recovered from the sterilizer through the cooling device to the circulation tank. processing apparatus, or heated by the heating device through the pre-heating of the heat exchange device to sterilizer the peracetic acid-based disinfectant solutions with enhanced microbiocidal by reaction with the additive in a circulating tank from the circulation tank The peracetic acid-based disinfectant solution after being supplied and sterilizing the packaging material is recovered to the circulation tank from the sterilizer through preliminary heat dissipation in the heat exchange device and cooling in the cooling device Forming circuit And the processor of peracetic acid-based disinfectant solutions, additives for trapping filter for collecting said additive after reinforcing germicidal reaction, upstream of the sterilizer at a downstream side of the heating device, or the An apparatus for treating a peracetic acid-based disinfectant solution, which is provided downstream of a heat exchange device and upstream of the heating device.

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