JP2851534B2 - Disinfection drying method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to, for example, bedding and clothing, incubators, hospitals, research laboratories, etc.
The present invention relates to a disinfecting and drying method useful for disinfecting and drying medical devices such as anesthesia machines.

[0002]

2. Description of the Related Art Conventionally, mats and futons used in hospitals, etc.
As a disinfecting and drying device for bedding and clothing such as blankets, and medical equipment such as incubators and anesthesia machines, they are placed in an airtight drying room, and then disinfected by applying air vibration under pressure and pressure. What reduced the drying time and swelled the processed product has been developed and put to practical use. Recently, as a countermeasure against hospital-acquired infection, a device has been proposed in which a disinfectant such as formalin is injected and vaporized into this device so that disinfection and drying can be performed more efficiently.

[0003]

However, since formalin has a pungent odor, the used exhaust gas cannot be discharged out of the system as it is, and neutralization with ammonia has been considered. However, there is a problem that it is difficult to completely neutralize so that neither formalin nor ammonia remains. Therefore, it was considered to oxidize and decompose by combustion,
Although formalin may be harmless oxidized by high-temperature combustion at 650 to 900 ° C., ammonia to become the shape of the NO _X when treated at high temperature, this method was applicable. In addition, since this disinfecting and drying apparatus needs to be placed in a limited place such as a hospital and work efficiently, it is required that the amount of exhaust gas and exhaust heat be small and that the equipment be compact. I have.

It is therefore an object of the present invention can be performed formalin disinfection of the bedding and clothing completely, moreover disinfected, bedding and clothing without formalin odor remains in news these disinfection Another object of the present invention is to provide a disinfecting and drying method capable of efficiently exhausting air with compact equipment.

[0005]

DISCLOSURE OF THE INVENTION The disinfecting and drying method according to the present invention
The law heats the air inside the disinfection drying room loaded with the material to be disinfected.
Circulates between the room and the disinfection and drying room to a predetermined temperature
After that, supply the disinfectant solution to the vaporizer provided in one corner of the disinfection drying room.
Supply, heat and vaporize, and the obtained disinfecting gas is disinfected in the dry room.
To disinfect the disinfected material by circulating
Gas is circulated between the disinfection drying room and the heating room to disinfect and dry
Keep the room at a constant temperature and heat the outside air after disinfection.
Into the disinfecting and drying room to remove the disinfecting gas
Reducing the concentration of disinfectant gas disinfection drying chamber with be out feeding the
And supply the neutralizing solution to the vaporizer to heat and vaporize it.
Neutralizes the disinfecting gas remaining in the poison drying chamber to produce neutralized exhaust gas.
To the exhaust gas treatment device and then to the exhaust gas treatment device
The disinfecting gas and the neutralized exhaust gas are
Heat to 200 ° C and oxidatively decompose by contact with platinum catalyst
After that, mix with cold air and discharge out of the system.
Diluent gas was replaced with air flow et is characterized that you release directly into the atmosphere.

Hereinafter, the disinfecting and drying method of the present invention will be described with reference to FIG. 1 showing one embodiment thereof. In FIG. 1, reference numeral 1 denotes a disinfecting and drying chamber for loading and disinfecting disinfectants such as bedding and clothes, and 2 denotes a vaporizer provided in one corner thereof, which includes a disinfecting solution such as a formalin diluent or ammonia. Pump the neutralizing solution such as water from each storage tank 3, 4
Is provided with a heater 7 for heating and vaporizing these after they are received by the supply means 5 and 6.

Reference numeral 8 denotes a main blower for exhausting the gas of the disinfecting solution or neutralizing solution filling the disinfecting and drying chamber 1 to the outside of the room, 9 denotes an inlet provided with a filter for receiving fresh air, and 10 denotes an inlet 9. A heater for heating the fresh air of the air or reheating various gases from the disinfecting and drying chamber 1 sent from the main blower 8 and sending it back to the disinfecting and drying chamber 1. Exhaust means to discharge air outside the system
The heat exchanger 13 includes a heat exchanger 11 and a means 12 for supplying heating steam. 14 is a pipe for transporting these air and gases,
A to E are pipe line switching dampers provided in this piping system. 15 is an exhaust gas treatment device, 16 is a flow control valve, 17 is a control panel of the exhaust gas treatment device 15, 18 is a mixer for taking in fresh air and mixing it with gas from the exhaust gas treatment device 15, and 19 is this mixed gas This is an exhaust blower for exhausting air out of the system.

Next, a disinfecting and drying method using the disinfecting and drying apparatus will be described. First, after operating the exhaust means 11 to remove residual steam, air, and the like in the heat exchanger 13, steam is quickly supplied from the heating steam supply means 12 to the heat exchanger 13 so that the inside of the heater 10 is cooled. Heat. An object to be disinfected (not shown) is charged into the disinfection drying chamber 1 and the door is closed.
At this time, the dampers A, C and E are closed and B and D are open at this time.
The heater 10 passes through the main blower 8 along the dotted arrow in the figure.
And circulates in a route of being heated and returning to the disinfecting and drying chamber 1 again, thereby heating the disinfecting and drying chamber 1 to a predetermined temperature. At this time, the interior of the disinfecting and drying chamber 1 is evacuated by opening the dampers A and E and closing the D to exhaust the air in the disinfecting and drying chamber 1, thereby further promoting the vaporization of the disinfecting solution or neutralizing solution described later. .

[0009] Next, fed to the vaporizer 2 by the supply means 5 such as a pump from storage tank 3 the disinfectant formalin diluent or the like, and is heated and vaporized by the heater 7. The obtained disinfecting gas disinfects the contents while circulating in the disinfecting and drying chamber 1, and some disinfecting gases are used in the same manner as in the air described above.
The air is sent from the disinfecting and drying chamber 1 to the heater 10 by the main blower 8, where it is heated and returned to the disinfecting and drying chamber 1 to maintain a constant temperature in the room. If a rotary on-off valve described in Utility Model Registration No. 1793029 is provided in the supply path of the heated disinfecting gas to the disinfecting and drying chamber 1, pneumatic vibration is applied to the disinfecting and drying chamber 1 by pressurization and decompression, thereby disinfecting. Work can be performed more effectively.

At the end of the disinfection, dampers A and C
Open and B closed (damper E remains closed)
Then, the air flow becomes a state indicated by a solid line arrow, and the fresh air sucked from the air inlet 9 provided with the filter is heated by the heater 10 and sent into the disinfecting and drying chamber 1 to maintain the temperature inside the chamber at a constant level. At the same time, the disinfecting gas in the disinfecting and drying chamber 1 is sent to the exhaust gas treatment device 15 via the damper A by the main blower 8 instead. Since the exhaust gas treatment device 15 is composed of a heating chamber 20 and a catalyst reaction chamber 21 from below,
The disinfecting gas first reaches the heating chamber 20, where it is heated to 150 to 200 ° C., and then sent to the catalytic reaction chamber 21, where the platinum catalyst is supported on cordierite, a composite oxide of silica, alumina and magnesia. And is oxidized by contact
After 9.9% or more is decomposed and deodorized, it is mixed with cool air in the mixer 18 to form an airflow of 70 ° C. or less and discharged out of the system by the exhaust blower 19.

When the replacement of the air flow in the disinfecting and drying chamber 1 proceeds smoothly and the concentration of the disinfecting gas decreases , the neutralizer such as ammonia water is supplied from the storage tank 4 to the vaporizer 2 by the supply means 6 such as a pump. After being vaporized by being heated by the heater 7, it is sent into the disinfecting and drying chamber 1 as a neutralizing gas, and the disinfecting gas remaining there is neutralized. Resulting et al The neutralized exhaust gas, after about 20 minutes, as in the case of the sterilization gas is fed into the exhaust gas treatment apparatus 15 through the damper A by the main blower 8. Neutralizing exhaust gas is heated and oxidized now to 150 to 200 ° C., is released is decomposed into nitrogen and water rather than generation of the NO _X from ammonia for low temperature processing to the atmosphere.
When the replacement of the air flow in the disinfecting and drying chamber 1 has proceeded smoothly and the neutralized exhaust gas has a low concentration, the damper E is opened to open the diluted exhaust gas.
The gas is released directly into the atmosphere. Thereby, the aeration in the disinfecting and drying chamber 1 can be more strongly promoted and removed in a short time.

[0012]

EXAMPLES Hereinafter, specific embodiments of the present invention will be described with reference to examples. In the disinfecting and drying apparatus having the structure shown in FIG. 1, 70 to 100 kg of bedding and clothing are placed in the disinfecting and drying chamber 1 having a capacity of 4 m ^3.
Charged and closed the door. The main blower 8 is turned to send the air in the disinfecting and drying chamber 1 to the heating chamber 10 where it is heated and returned to the disinfecting and drying chamber 1 again. did. Next, a 17-19% formalin solution was fed from the storage tank 3 to the vaporizer 2 by the pump 5 at 50 ml / m ³ and heated to 100 ° C. or more to vaporize. The obtained formalin gas is circulated in the disinfecting and drying chamber 1 to be used for disinfecting bedding and clothes, and a part of the formalin gas is sent to the heating chamber 10 where it is heated and returned to the disinfecting and drying chamber 1 to reduce the room temperature. It was kept constant and disinfection continued for about 100 minutes.

[0013] After sterilization, warm outside air from the intake port 9 by switching the damper at the heater 10, the feed disinfection drying chamber 1 and sent to an exhaust gas treatment apparatus 15 formalin gas sterilization drying chamber 1 in the main blower 8 150-200 ℃ in heating room 20
And then oxidatively decompose in the catalyst reaction chamber 21 and mix
Mixed with the outside air and released into the atmosphere. Thirty minutes later, when the concentration of formalin gas in the disinfecting and drying chamber 1 drops to 0.5%, 12.5% ammonia water is sent to the vaporizer 2 from the storage tank 4 by the pump 6 from the storage tank 4 at 30 ml / m ³ , and the temperature is raised to 100 ° C. or more. The mixture was heated to vaporize, sent into the disinfecting and drying chamber 1 and neutralized with residual formalin gas. After 20 minutes, the neutralized exhaust gas
And heated and oxidatively decomposed, cooled and released into the atmosphere in the same manner as described above. After another 10 minutes, when the concentration of ammonia gas in the disinfecting and drying chamber 1 decreased, the damper E was opened and the air was directly exhausted without passing through the exhaust gas treatment device 15 to perform strong aeration. Neutralization with this ammonia gas
After repeating a series of evacuation steps for 2 to 3 cycles, bedding and clothing were taken out of the disinfection drying chamber 1.

[0014]

According to the sterilizing method of drying the present invention, since processing the disinfection gases and neutralizing exhaust gases at low temperatures, N
Never harmful substances such as O _X is contained in the exhaust. In Disinfection drying chamber, heating, sterilization, exhaust gas, a series of steps of neutralizing Oyo <br/> beauty that exhaust gas can be carried out smoothly and quickly with compact equipment. The odor of formalin or ammonia does not remain in disinfectants such as bedding and clothing, and disinfection can be performed reliably.

[Brief description of the drawings]

FIG. 1 is a system explanatory diagram showing one embodiment of the disinfecting and drying method of the present invention.

[Explanation of symbols]

1: disinfection drying room, 2: vaporizer, 3, 4
... storage tank, 5, 6 ... supply means, 7 ... heater,
8: Main blower, 9: Inlet, 10: Heater, 11
... Exhaust means, 12 ... Steam supply means for heating, 13 ... Heat exchanger, 14
... Piping, 15 ... Exhaust gas treatment device, 16 ... Flow control valve, 17
... Control panel, 18 ... Mixer, 19 ... Exhaust blower, 20
... warming room, 21 ... catalyst reaction room, A to E ... pipe line switching damper.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61L 2/00-2/26

Claims (3)

(57) [Claims] 1. The air in a disinfection drying room loaded with a substance to be disinfected.
Is circulated between the heating chamber and the heating chamber.
Each time, heat it to a vaporizer installed in one corner of the disinfection drying room.
Supply venom, heat and vaporize, and disinfect the resulting disinfecting gas
Circulate through the drying chamber to disinfect the disinfectant,
Circulate the disinfectant gas between the disinfection drying room and the heating room.
Maintain a constant temperature in the disinfection and drying room, and
Is heated and sent into the disinfection drying chamber, and the disinfecting gas is exhausted.
Sent to the processing unit and the concentration of disinfecting gas in the disinfection drying room.
The neutralization liquid is supplied to the vaporizer to heat and evaporate.
To neutralize the disinfecting gas remaining in the
The gas is sent out to an exhaust gas treatment device and the exhaust gas treatment device
The disinfecting gas and neutralized exhaust gas sent to
Heated to 150-200 ° C and oxidized by contact with platinum catalyst
After disassembly, mix with cold air and discharge out of the system, disinfect and dry
The diluent gas that has been further replaced with airflow in the room
Disinfection drying wherein that release. 2. Vibration caused by pressurization and decompression of a disinfecting gas from a heating chamber.
The disinfecting and drying method according to claim 1, wherein the method is applied for disinfection. 3. A disinfectant solution is formalin diluent disinfection dry neutralization solution according to claim 1 or 2 wherein the aqueous ammonia
How .