JPH0463287B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention efficiently incinerates waste such as syringe needles and recovers the products after treatment while incinerating paper, garbage, etc. The present invention relates to a method for incinerating waste such as syringe needles, and an incinerator therefor.

[Conventional technology]

Currently, needles are disposable to prevent the spread of AIDS and hepatitis B, and used needles must be disposed of. The best way to dispose of this is to incinerate it, since burying it in the ground or dumping it in the sea not only takes a lot of effort, but also poses a risk of causing pollution problems.

By the way, in ordinary incinerators for paper, garbage, etc.
Incineration of syringe needles is difficult due to their structure and combustion temperature. Furthermore, as shown in Japanese Patent Application Laid-Open No. 52-123570, an auxiliary melting furnace is placed adjacent to the rear of the incinerator, and waste plastics placed in the auxiliary melting furnace are heated and melted by radiant heat from the incinerator. However, even with this method, it is still difficult to incinerate needles due to combustion temperature and other structural factors. This is because incineration of syringe needles requires extremely high combustion temperatures and sufficient circulation of combustion air.

On the other hand, as shown in Japanese Patent Publication No. 56-51126, waste materials such as sludge and garbage are heated and carbonized, and then a thermite agent is added to the mixture and reheated to utilize the high heat produced by the thermite reaction. There is a method to incinerate the waste, but this requires special equipment such as an electric furnace to preheat the waste and a sealable iron container to store it for the thermite reaction. Moreover, depending on the method, the use is limited only to the treatment of the waste.

As described above, the current situation is that there is no method for effectively and appropriately incinerating used injection needles.

[Problem to be solved by the invention]

The present invention has been made in view of the above, and aims to quickly, easily, and reliably incinerate waste such as hypodermic needles while incinerating paper, garbage, etc. using an incinerator. It is an object of the present invention to provide a method for incinerating waste such as syringe needles and an incinerator for the same, which is capable of incinerating syringe needles and the like, and which has a good recovery efficiency of metal lumps produced after the processing and can also be recycled.

[Means to solve the problem]

The present invention incinerates waste such as syringe needles in the incinerator while incinerating paper, garbage, etc. using the high heat generated by thermite reaction, and recovers the products after incineration. However, in order to achieve the above purpose, the method of preheating the container for containing syringe needles and other waste necessary for incineration and the method of collecting the products after incineration are unique in that we have devised a method for collecting waste products after incineration. takes the following measures:

First, it moves from near the lower bottom plate of the combustion chamber of the incinerator to the top plate, rises while turning along the inner circumferential wall of the combustion chamber, and is discharged to the outside from the chimney that hangs a suitable length into the combustion chamber from the top plate of the combustion chamber. The combustion air preheats the waste storage cylinder, which is located slightly below the lower end of the chimney and extends in an inclined manner between the inner circumferential walls of the combustion chamber.

Next, when the preheating reaches an appropriate temperature (sufficient temperature suitable for incineration of wastes such as syringe needles), wastes such as syringe needles are placed in the storage cylinder using a temifying agent and a flux. These are then melted and incinerated by the thermite reaction that accompanies heating and combustion.

Next, after the melting and incineration, the heating combustion is stopped, and the metal lumps of molten syringe needles and other wastes that are cooled, solidified, and collected and remain in the lower part of the housing cylinder in the inclined direction are discharged.

Furthermore, the incinerator used in this method for incinerating waste such as injection needles has the following configuration.

At least one pair of air intake pipes are disposed in the combustion chamber so as to face each other from the top plate of the combustion chamber toward the bottom plate, with an appropriate distance between the lower end of the pipe and the bottom plate (near the bottom plate). It is set up.

At least one pair of air suction pipes has an opening cut obliquely at the lower end of the air suction pipe,
The opening surfaces thereof are formed to open along the inner circumferential wall surface of the combustion chamber so that the air introduced into each intake pipe sequentially swirls along the inner circumferential wall surface of the combustion chamber.

The lower end of the chimney, which protrudes outward from the upper surface plate of the combustion chamber, is suspended within the combustion chamber by an appropriate length.

At a position slightly below the lower end of the chimney, a waste container such as a syringe needle is disposed in an inclined manner between the inner circumferential walls of the combustion chamber.

[Effect]

a. Preheating of the waste storage cylinder When paper, garbage, etc. are burned in the incinerator, the air introduced from the outside to near the lower bottom plate of the incinerator is sequentially blown out along the inner peripheral wall inside the incinerator and heated. As it moves, it ascends from the bottom of the incinerator to the top while turning.

This combustion air is not immediately discharged to the outside from the chimney, but rises while swirling to the vicinity of the top plate of the incinerator, is guided to the lower end of the chimney that hangs down an appropriate length inside the combustion chamber, and is then passed through the chimney. It is discharged to the outside.

Therefore, even when a large amount of thick paper such as telephone directories, magazines, forms, etc., and garbage such as plants are stored in the incinerator, sufficient combustion can be achieved in each part from the lower part to the upper part of the incinerator. Air is supplied uniformly to ensure good combustion, and the inside of the incinerator is heated to a high temperature in an extremely short period of time.

The waste container such as syringe needles is suspended between the inner peripheral walls of the incinerator at a position slightly below the lower end of the chimney that hangs down an appropriate length into the incinerator. The incinerator is suitable for incinerating syringe needles in a short period of time due to heating and reheating caused by the circulation of combustion air between the swirling flow from the bottom to the top in the incinerator and the swirling flow descending from the top and heading outside from the chimney. It is preheated to a high temperature and maintained at that high temperature.

b. Incineration of waste such as syringe needles When the waste container cylinder is preheated to a temperature suitable for incineration of syringe needles, a large amount of waste such as used syringe needles is added to it with thermite agent and flux. Add the ingredients, mix and stir, and continue heating.

Then, these are heated to a high temperature of approximately 3000°C or higher in a short time due to thermite reaction, and are melted and incinerated.

c Product recovery After melting and incinerating waste such as syringe needles, stop heating. Then, as the temperature in the incineration chamber drops, many metal lumps of waste such as syringe needles that have been melted and incinerated remain on the lower side of the waste storage cylinder in the sloping direction. The waste is appropriately discharged to the outside using a rod, etc., collected, and used for metal recycling.

d Others Due to the above-mentioned circulation and discharge of combustion air from the combustion chamber to the chimney, a large amount of thick and large amount of incinerated materials such as paper and garbage in the incinerator and used syringes in the waste storage cylinder are removed. , bandages, gauze, absorbent cotton, and other incidental equipment will be completely burned.
No incomplete combustion gas or foul odor is released from the chimney to the outside.

〔Example〕

An embodiment of the present invention will be described with reference to the attached drawings.

Reference numeral 1 denotes a combustion chamber of an incinerator used for incineration of waste such as syringe needles, and has a cylinder 6 for storing the waste therein. Inside the combustion chamber 1, there is a pair of air intake pipes 4 extending from the top plate 2 to the bottom plate 3.
4' are disposed opposite to each other, and their lower tips extend close to the bottom plate 3.

The lower tips of the air suction pipes 4, 4' are openings 5, 5' which are formed by cutting a part of the peripheral wall surface downward obliquely, respectively.
5' are air suction pipes 4,
The openings are opened in the peripheral wall surface on the opposite side of the lower end of the combustion chamber 4', and the opening surfaces thereof are oriented in a direction along the inner peripheral wall surface of the combustion chamber 1. Reference numerals 17 and 17 designate air adjustment plates that are superimposed on the outer surface of the upper surface plate 2 of the combustion chamber 1 so as to be rotatable along the upper surface plate. Holes 18, 18 and a chimney outlet hole 19 are formed, and by adjusting the opening area of the suction holes 18, 18 by rotating each other, a pair of air suction pipes 4,
The intake amount of combustion air from 4' is adjusted.

Reference numeral 15 denotes a chimney for discharging combustion air, the upper end of which projects upwards from the upper plate 2 of the combustion chamber 1 and opens to the outside, and the lower end extends downward from the upper plate 2 by an appropriate length. It is arranged in the combustion chamber 1 in a hanging manner.

When paper, dust, etc. are burned in the combustion chamber 1,
Combustion air introduced from the upper outside through a pair of air intake pipes 4, 4' rises from the bottom to the top of the combustion chamber 1, swirling along the inner circumferential wall surface, and when it reaches the top plate 2. It descends, is guided to the lower end of the chimney 15 located inside the combustion chamber 1, and is discharged to the outside.

The swirling flow of combustion air in the combustion chamber 1 preheats the waste container 6 such as a syringe needle. This waste storage cylinder 6 is disposed in the combustion chamber 1 at a position slightly below the lower end of the chimney 15, and is arranged in an inclined manner between the inner circumferential walls of the combustion chamber 1. is projected to the outside. One end protruding to the outside is closed by a closing plate 7, and an input port 8 is formed on the top surface, and the outer surface thereof is a mounting cover having an input port 9 connected to the input port 8. Covered by 10. An opening/closing lid 11 is attached to the other side end of the waste storage cylinder 6 that projects outside, and its outer surface is covered with a detachable mounting cover 12.

Inside this waste storage cylinder 6, a stirring rod 13 having a large number of swirling blades is disposed along its length.
is rotatably attached, and its rotation handle 14 is led out from one end of the housing cylinder 6. Further, the housing cylinder 6 is provided with an appropriate number of gas vent holes 22. Combustion air into the housing cylinder 6 is introduced through the inlets 9 and 8 and exhausted through the gas vent hole 22.

Reference numeral 16 denotes a secondary combustion plate, which is attached to the upper circumferential wall surface of the waste storage cylinder 6 and located below the lower end of the chimney 15.

When the waste storage cylinder 6 has been preheated to a temperature sufficient for incinerating the syringe needles, a large amount of used syringe needles and other waste are poured into the cylinder through the inlets 9 and 8, and aluminum , a thermite agent and flux made of a powder mixture of metals such as magnesium, sodium, and calcium, silica, or carbon and iron oxide are mixed and stirred by rotating the stirring rod 13 to form a combustion chamber. Continue heating and combustion within 1.

Then, since the waste storage cylinder 6 has been heated to a sufficiently high temperature, the heating temperature inside the combustion chamber 1 and the waste storage cylinder 6 is about 3000 yen due to the thermite reaction by the thermite agent and further promotion of the reaction by the addition of flux. The temperature reaches temperatures of over 30°F, and waste materials such as syringe needles are melted and incinerated in a short period of time.

Then, when the heating combustion is stopped, as the temperature in the combustion chamber 1 falls, the melted and incinerated waste such as syringe needles cools and solidifies together with thermite aluminum, etc., and a large number of metal lumps are formed in the storage cylinder 6. remain as. Since the storage cylinder 6 is inclined downward from the input port 8 side to the opening/closing lid 11 side at the tip, the metal lumps gather and remain on the opening/closing lid 11 side, and after cooling and solidifying, the opening/closing lid 11 and mounting cover 12
Open it and take it outside for metal regeneration. In the waste storage cylinder 6, in addition to used injection needles, used bandages, gauze, absorbent cotton, and other incidental instruments can be melted and incinerated.

In the figure, 20 is an inlet for incinerating materials such as paper and garbage provided on the upper side of the combustion chamber 1, and 21 is an inlet for incinerating materials such as the combustion chamber 1.
This is the installation port for a combustion device such as a burner provided on the lower side of the unit. Note that both the inner and outer walls of the combustion chamber 1 are subjected to heat-resistant treatment such as alumer plating to enhance durability.

Inside the combustion chamber 1, thick papers such as used telephone directories, magazines, forms, garbage, garbage such as plants, etc. are incinerated. Since the amount of combustion air taken into the combustion chamber 1 and its swirling circulation within the combustion chamber 1 are good, even if a large amount of paper, garbage, etc. is input,
Sufficient combustion air is supplied to each part of the combustion chamber 1, combustion efficiency is good, and a considerably high temperature is reached in a short time. Since the lower end of the chimney 15 hangs down within the combustion chamber 1 for a suitable length, the combustion air (flame) that has risen due to heating is not immediately exhausted to the outside from the top plate 2, but is exhausted from the chimney to the outside. The waste storage cylinder 6 is reheated when the waste storage cylinder 6 is heated, and the secondary combustion plate 16 that is attached to the waste storage cylinder and preheated is disposed below the lower end of the chimney 15. The incinerated material is completely combusted, and incomplete combustion gas and foul odor are prevented from being discharged to the outside.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

(1) Incineration of paper, garbage, etc. in an incinerator and simultaneous incineration of waste such as hypodermic needles without requiring special equipment such as an electric furnace or sealed container, and without requiring preheating. processing can be planned.

(2) The intake, circulation, and discharge of combustion air in the incinerator and its combustion efficiency, as well as the arrangement of the housing tube for syringe needles, etc., have been devised to preheat the waste. The storage cylinder required for incineration of waste can be sufficiently preheated in a short time, and together with heating using thermite reaction, it is possible to quickly incinerate waste such as syringe needles, which was previously considered difficult. It can be done easily and reliably, and the incineration processing efficiency is good.

(3) Metal lumps generated after incineration of waste such as hypodermic needles can be used for metal recycling, and their recovery is easy and efficient.

[Brief explanation of the drawing]

The drawings show an embodiment of the incinerator used in the method for incinerating waste such as syringe needles of the present invention, and FIG. 1 is a plan view, FIG.
The figure is a sectional view taken along line BB in FIG. 1... Combustion chamber, 2... Top plate, 3... Bottom plate,
4, 4... Air intake pipe, 5, 5'... Opening,
6...Waste storage cylinder.

Claims (1)

[Scope of Claims] 1. From near the lower bottom plate of the combustion chamber of the incinerator toward the upper upper plate, it ascends while turning along the inner circumferential wall of the combustion chamber, and hangs down an appropriate length into the combustion chamber from the upper plate of the combustion chamber. Combustion air discharged from the chimney to the outside preheats the waste storage cylinder, which is located slightly below the lower end of the chimney and extends in an inclined manner between the inner peripheral walls of the combustion chamber. When the temperature reaches an appropriate temperature, waste materials such as syringe needles are put into the storage cylinder along with the addition of a thermite agent and flux, and are melted and incinerated by a thermite reaction accompanying heating and combustion.After the melting and incineration, the heating and combustion is stopped. A method for incinerating waste such as syringe needles, which comprises discharging and discharging molten metal lumps of waste such as syringe needles that are cooled, solidified, and collected at the lower side of the storage cylinder in an inclined direction. 2. At least one pair of air intake pipes are disposed in the combustion chamber facing each other from the top plate to the bottom plate of the combustion chamber, with an appropriate distance between the lower tip and the bottom plate, and the at least one pair An opening is cut obliquely at the lower tip of each air intake pipe, and the opening surface is designed to allow the air introduced into each intake pipe to swirl in a predetermined direction along the inner circumferential wall surface of the combustion chamber. The chimney is formed to open along the inner peripheral wall surface of the combustion chamber, and the lower end of the chimney protruding outward from the upper surface plate of the combustion chamber is allowed to hang down an appropriate length into the combustion chamber, and the lower end of the chimney is slightly An incinerator characterized in that a waste container such as a syringe needle is disposed in an inclined manner between inner peripheral walls of a combustion chamber at a lower position.