JPH10263023A - Melting sterilizer for disposal of medical waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to dispose of vinyl chloride and reduce costs and to improve the life of a melting furnace and that of a gas processing part. SOLUTION: Medical waste 1 is dissolved and sterilized at a predetermined temperature and reduced in volume in a melting and volume-decreasing part 2, and gas generated in the melting and volume-reducing part 2 is removed by a primary gas removal part 14 of the scrubber type or the like and a secondary gas removal part 16 comprising activated charcoal, etc. The medical waste 1 is held at the predetermined temperature in the melting and volumereducing part 2, is heated at temperatures from 150 to 190 deg.C, and is compressed by a press means 11 under a predetermined pressure to reduce its volume.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dissolution sterilizer for treating medical waste such as a petri dish, an infusion tube, a syringe and the like, which dissolves and sterilizes medical waste. The present invention relates to a melting and sterilizing machine for treating medical waste, which is capable of improving the life of a melting furnace and a gas processing section while improving the life of the melting furnace.

[0002]

2. Description of the Related Art Medical waste, such as petri dishes, infusion tubes, and syringes, generated in medical institutions and the like, is subjected to dissolution sterilization by a dissolution sterilizer for treating medical waste, and then disposed of as ordinary waste. .

[0003] A conventional dissolution sterilizer for medical waste treatment comprises a dissolving and volume reducing section which dissolves and sterilizes medical waste at a temperature of 230 to 250 ° C to reduce the volume, and absorbs gas generated in the dissolving and reducing section. And a gas removal unit provided with a catalyst to be removed.

[0004] In a conventional dissolution sterilizer for treating medical waste, medical waste is introduced into a dissolution reducing part and heated by a heater.
The volume is reduced by heating at a temperature of ２５０250 ° C. to dissolve and sterilize, and gases such as toluene, ethylbenzene and benzene generated in the dissolution reducing part are absorbed and removed by the gas removing part.

[0005]

However, according to the conventional dissolution sterilizer for treating medical waste, the heating temperature for dissolving and sterilizing the medical waste is as high as 230 to 250 ° C., which increases the cost and increases the cost. There is a problem that the life of the melting furnace is shortened. In addition, when the heating temperature is high, the amount of gas emission increases, and the life of the gas processing unit is shortened. Furthermore,
When processing vinyl chloride, chlorine gas is generated, and it is difficult to remove the chlorine gas in a gas removing section provided with a catalyst. For this reason, there is a problem that the treatment of vinyl chloride is difficult.

Accordingly, it is an object of the present invention to provide a dissolution sterilizer for treating medical waste, which is capable of treating vinyl chloride.

Another object of the present invention is to provide a dissolution sterilizer for treating medical waste, which can reduce the cost and extend the life of the melting furnace and the gas treatment section.

[0008]

DISCLOSURE OF THE INVENTION In view of the above problems, the present invention provides a method for treating medical waste, which is capable of treating vinyl chloride, reducing costs and improving the life of a melting furnace and a gas processing unit. The dissolving and reducing part which dissolves and sterilizes at a predetermined temperature to reduce the volume, the primary gas removing part such as a scrubber for removing gas generated in the dissolving and reducing part, and the primary gas removing part could not completely remove the gas. An object of the present invention is to provide a dissolution sterilizer for treating medical waste provided with a secondary-side gas removing unit such as activated carbon for removing remaining gas.

The dissolving and volume reducing section includes a pressing means for compressing the medical waste at a predetermined pressure, and a medical treatment method for setting the medical waste to a predetermined temperature from 150 ° C. to 190 ° C. at the same time as before or after the pressing operation of the pressing means. It is preferable to have a heating means for heating at a temperature of ° C.

[0010] The secondary gas removing section preferably has a supply section to which the remaining gas that has not been completely removed is supplied, and a discharge section connected to a gas discharge section of the dissolution reducing section. .

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a dissolution sterilizer for treating medical waste according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a dissolving sterilizer for treating medical waste according to a first embodiment of the present invention. This dissolution sterilizer for medical waste treatment comprises a dissolution volume reduction unit 2 for dissolving and sterilizing medical waste 1 such as a petri dish, an infusion tube, and a syringe to reduce its volume.
And a gas removing unit 3 for removing gas generated in the dissolving and volume reducing unit 2, and a control unit 4 for controlling the dissolving and volume reducing unit 2 and the gas removing unit 3.

The melting and reducing section 2 includes a melting furnace 5 for storing the medical waste 1, a door 6 provided to be openable and closable in the melting furnace 5,
The medical waste 1 provided on the bottom of the melting furnace 5 and in the melting furnace 5
Heater at a temperature of 180 ° C., a discharge port 8 for discharging gas generated in the melting furnace 5, a hydraulic section 10 for generating a predetermined hydraulic pressure in the cylinder section 9, and a medical section protruding from the cylinder section 9. A press section 11 for compressing the waste 1 at a predetermined pressure, and a gas chamber (gas discharge section) 1 for storing gas discharged from the discharge port 8 and gas returned from the gas removing section 3.
Two.

The gas removing section 3 is composed of the gas chamber 1 of the melting and reducing section 2.
And a primary gas removing unit 14 connected to the primary gas removing unit 14 via a pipe 15 to remove the gas sent from the gas chamber 12.
The gas in the gas chamber 12 of the dissolving and volume reducing section 2 is removed via the secondary gas removing section 16 for removing the remaining gas that has not been completely removed in Step 4, the primary gas removing section 14, and the secondary gas removing section 16. It has a pump 17 for suctioning, and a pipe 18 for returning the remaining gas that could not be removed by the secondary gas removing unit 16 to the gas chamber 12 of the dissolving and volume reducing unit 2.

The primary gas removing unit 14 employs a scrubber system in which a gas is passed through the water 14A, and is configured to dissolve and remove the gas in the water 14A.

The secondary gas removing unit 16 has activated carbon therein, and is configured to remove the gas passing therethrough by adsorbing the activated carbon on the activated carbon.

The control section 4 is configured to control the timing of the compression operation of the press section 11 based on the amount of the medical waste 1 to be processed. At the same time, the compression operation is performed, and when the treatment amount is large, the compression operation is performed after a predetermined time from the heating of the medical waste 1.

Hereinafter, the operation of the dissolution sterilizer for medical waste treatment according to the first embodiment will be described. Here, a case where the pressing operation of the press unit 11 is performed after a predetermined time from the heating of the medical waste 1 will be described.

First, the timing of the compression operation of the press unit 11 is set from the control unit 4 in accordance with the amount of medical waste 1 to be processed. Then, the door 6 of the melting furnace 5 is opened, and the medical waste 1 is put into the melting furnace 5. Next, the power supply (not shown) of the control unit 4 is turned on to drive the heater 7 and the melting furnace 5
The medical waste 1 inside is heated at a temperature of 180 ° C. At a set time after the heating, the medical waste 1 is melted and softened. At this time, the control unit 4 generates a predetermined oil pressure in the cylinder unit 9 to lower the press unit 11, and as shown in FIG. Then, the medical waste 1 is compressed to reduce its volume.

At this time, the gas generated in the melting furnace 5 is discharged from the discharge port 7 into the gas chamber 12 and is sucked by the pump 17 to be sent to the primary gas removing section 14 through the pipe 13. In the primary gas removing unit 14, a gas of a substance having high solubility in water is dissolved in the water 14A and removed. On the other hand, the remaining gas that could not be removed here is
And is sent to the secondary gas removing unit 16 through the activated carbon. The gas that cannot be removed here is discharged from the pump 17 and returned to the gas chamber 12 through the pipe 18.

Here, when the petri dish (polystyrene) and the infusion tube (vinyl chloride) as the medical waste 1 are dissolved and sterilized at 180 ° C. in the dissolving and reducing section 2 to reduce the volume, they are discharged from the melting furnace 5. The main decomposition gases are as shown in Table 1.

[Table 1]

The solubility in each of the decomposition gas and water is as shown in Table 2.

[Table 2]

As can be seen from Table 2, each decomposition gas is water-soluble,
Alternatively, since it has a predetermined solubility in water, all or almost all of the decomposed gas generated in the dissolution reducing part 2 is removed in the primary gas removing part 14, and the remaining decomposed gas not removed is also removed. It is removed in the secondary gas removing unit 16. For this reason, the dissolution sterilization treatment of the medical waste 1 containing vinyl chloride can be performed. Further, by discharging the water 14A containing gas and supplying fresh water, the amount of dissolved gas can be increased.

Further, since the medical waste 1 is heated at a temperature of 180 ° C. to dissolve and sterilize it, and is compressed at a predetermined pressure by the press unit 11 to reduce the volume, the cost is reduced by reducing the power consumption of the heater. And the service life of the melting furnace 5 can be improved. Further, since the heating temperature is low, the amount of gas discharged is also reduced, and the life of the gas removing section can be improved. Further, hydrogen chloride gas is generated from the medical waste made of vinyl chloride, and can be removed by the primary gas removing unit 14.

Further, the remaining gas that has not been completely removed by the secondary gas removing unit 16 is returned to the gas chamber 12 of the dissolving and reducing unit 2.
Since the primary gas removing unit 14 and the secondary gas removing unit 16 repeatedly remove the gas, the gas can be completely removed. Further, gas is not discharged to the outside, and air pollution and the like can be prevented.

In the above embodiment, the pressing unit 11
Although the case where the compression operation is performed simultaneously with the heating of the medical waste 1 or after a predetermined time has been described, the compression operation may be performed before the heating of the medical waste 1.

[0027]

As described above, according to the dissolving sterilizer for medical waste treatment of the present invention, the medical waste is dissolved and sterilized at a predetermined temperature in the dissolving and reducing section, and the volume is reduced. The gas generated in step (1) is removed by a primary gas removing unit such as a scrubber system and a secondary gas removing unit such as activated carbon, so that vinyl chloride waste can be treated. Further, the medical waste is heated at a temperature of 150 to 190 ° C. as a predetermined temperature, and is compressed at a predetermined pressure by a pressing means to reduce the volume, so that the cost can be reduced and the life of the melting furnace and the gas removing unit can be reduced. Can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a dissolution sterilizer for treating medical waste according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state during processing according to the first embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Medical waste 2 Dissolution volume reduction part 3 Gas removal part 4 Control part 5 Melting furnace 6 Door 7 Heater 8 Discharge port 9 Cylinder part 10 Hydraulic part 11 Press part 12 Gas chamber 13 Pipe 14 Primary gas removal part 14A Water 15 Pipe 16 Secondary gas removal unit 17 Pump 18 Piping

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B09B 3/00

Claims (3)

[Claims] 1. A dissolution sterilizer for treating medical waste such as a petri dish, an infusion tube, and a syringe for dissolving and sterilizing medical waste, wherein the medical waste is dissolved and sterilized at a predetermined temperature to reduce the volume. And a primary side gas removing section such as a scrubber system for removing gas generated in the dissolving and volume reducing section; and a secondary side such as activated carbon for removing remaining gas that cannot be completely removed by the primary side gas removing section. Dissolution sterilizer for treating medical waste, comprising a gas removing unit. 2. The dissolving and volume reducing section includes a pressing means for compressing the medical waste at a predetermined pressure, and the predetermined amount of the medical waste at the same time as before or after the pressing operation of the pressing means. Temperature from 150 ° C to 190C
The dissolution sterilizer for treating medical waste according to claim 1, further comprising a heating means for heating at a temperature of °. 3. The secondary gas removing section has a supply section to which the remaining gas that has not been completely removed is supplied, and a discharge section connected to a gas discharge section of the melting and volume reducing section. The dissolution sterilizer for treating medical waste according to claim 1.