JPH10267236A - Incineration method and apparatus for highly wet flame-retardant object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable complete incineration of a highly wet flame resisting matter such as used paper diaper without generating offensive smell and black smoke. SOLUTION: A highly wet flame-retardant matter fed in a batch manner is carbonized by non-flame heating in a carbonization chamber 1. Then, the highly wet flame-retardant matter thus carbonized is extruded by the highly wet flame-retardant matters continuously fed and dropped into a main combustion chamber 2 to be burned by a flame with a main burner 8. A combustion gas generated by the combustion is made to pass through a flame of an afterburner 13 in a recombustion chamber 3 to remove black smoke by further combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for incinerating humid flame retardants, especially used paper diapers.

[0002]

2. Description of the Related Art Humid and flame retardant materials, especially used paper diapers and the like, have human urine adhered to them, so that small incinerators conventionally used have poor ignition and generate odor when heated. There are many problems, such as black smoke generated during incineration, and long time required for incineration. In addition, about 20% of the residue (incineration ash) after incineration is discharged.

[0003]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for incinerating a humid and flame-retardant material, wherein the humid and flame-retardant material charged in a batch system is first carbonized by flameless heating, and then the carbonized humid and flame-retardant material is heated. The object is incinerated by a flame, and the combustion gas generated by the incineration is passed through the flame for further combustion.

The humid and flame-retardant incinerator according to the present invention is provided with: a) a carbonization chamber for flameless heating of the humid flame-retardant charged in a batch mode and carbonization; and b) a lower rear portion of the carbonization chamber. A main combustion chamber for incinerating the carbonized humid flame retardant with a flame, and c) a recombustion chamber for further burning the combustion gas generated by the incineration in the main combustion chamber with a flame. .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A humid and flame-retardant incinerator according to one embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the humid and flame-retardant incinerator according to the present embodiment mainly includes a carbonization chamber 1, a main combustion chamber 2, a reburning chamber 3, and a chimney 4.
The main combustion chamber 2 is provided behind and below the carbonization chamber 1. The reburning chamber 3 is provided behind the carbonization chamber 1 and includes a portion above the main combustion chamber 2 and a rear portion separated from the main combustion chamber 2 by a wall 12. The chimney 4 is exhausted from the rear part (lower part) of the reburning chamber 3. An incineration material inlet 5 with a lid 6 is provided on the front surface of the carbonization chamber 1.

A main burner 8 is provided in the main combustion chamber 2, and an air outlet 10 is provided near the main burner 8.
The air blown out from this is not only air for combustion of the main burner 8 but also has the effect of stirring the incineration in the main combustion chamber 2. The main burner 8 is attached to a door 11 which can be opened and closed, and this door 11 is an ash door for discharging residues after incineration.

A heat exchanger 7 is provided at the bottom of the coking chamber 1 and serves as a heating source for the coking chamber 1. The heat exchanger 7 is heated by the main burner 8 of the main combustion chamber 2. . A plurality of air valves 17 are provided on the wall surface of the carbonization chamber 1, and air is supplied to these from a combustion air blower 16 provided outside the apparatus.

The afterburner 13 is provided in the reburning chamber 3. The wall 12 separating the main combustion chamber 2 and the rear (lower) of the re-combustion chamber 3 constitutes a heat exchanger. A plurality of air valves 18 are provided on the wall surface of the reburning chamber 3,
The air supplied from the combustion air blower 16 blows out therefrom.

An ejector 15 is provided inside the chimney 4, and air supplied from an ejector blower 14 is discharged from the ejector 15.

A temperature sensor 19 is provided above the main combustion chamber 2.
Further, another temperature sensor 20 is also provided near the outlet of the reburning chamber 3, and a controller (not shown) controls the thermal power of the main burner 8 and the afterburner 13 so as to set the furnace temperature to about 750 ° C. .

[0011]

In the combustion furnace having the above-mentioned structure, when the heat exchanger 7 is sufficiently heated by the ignition of the main burner 8, the humid flame retardant such as used paper diapers is batchwise fed from the charging port 5 into the carbonization chamber. 1, the moisture contained in the humid flame-retardant material is mostly evaporated by the heat of the heat exchanger 7 and is kept for a certain period of time.
Minutes), the humid flame retardant carbonizes.

When the next humid and flame-retardant material is introduced into the carbonization chamber 1 through the charging port 5, the incinerated material which has been introduced first and carbonized is pushed by the humid and flame-retardant material which has been introduced later and is subjected to carbonization. From the rear of the main combustion chamber 2.

The carbide that has fallen to the bottom 9 of the main combustion chamber 2 is:
It is directly burned by the flame of the main burner 8. Since the furnace temperature at this point is controlled to be maintained at approximately 750 ° C., the ammonia of the carbonized combustion material has been removed, and the carbonized combustion material is completely burned by the main burner 8. , And the residue is in a small amount.

The combustion gas from the main burner 8 rises in the main combustion chamber 2 and reaches the reburning chamber 3, where it is reburned by the flame of the afterburner 13 and the heat of the heat exchanger 12.
Black smoke in the combustion gas is extinguished. The reburned gas goes to the chimney 4 from the outlet of the reburning chamber 3.

Inside the chimney 4, the combustion gas is cooled by the ejector air discharged from the ejector 15, and is discharged vigorously out of the machine.

[0016]

According to the present invention, the primary combustion is performed in the carbonization chamber, the secondary combustion is performed in the main combustion chamber, and the combustion gas generated by the secondary combustion is further reburned by the above method and apparatus. Therefore, it is possible to completely incinerate a used paper diaper or the like to which human excrement adheres in a short time, and to prevent generation of offensive odor and black smoke. In addition, due to complete combustion, the amount of residue after incineration is greatly reduced, and ashing may be performed only once a day. Further, the primary combustion is performed by heat exchange of the main burner of the secondary combustion in the main combustion chamber, and the heat exchange of the main burner is used for re-combustion, so that the thermal efficiency is improved. . Further, the heat exchanger makes the temperature distribution inside each combustion chamber uniform.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a humid and flame-retardant incinerator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a right side view of the incinerator according to the embodiment when viewed from an inlet.

FIG. 5 is a left side view of the incinerator according to the embodiment when viewed from an inlet;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carbonization chamber 2 Main combustion chamber 3 Reburning chamber 4 Chimney 5 Incineration material inlet 6 Lid 7 Heat exchanger 8 Main burner 9 Bottom part of main combustion chamber 10 Air outlet 11 Ash door 12 Wall (heat exchanger) 13 Afterburner 14 Ejector blower 15 Ejector 16 Combustion air blower 17 Air valve 18 Air valve 19 Temperature sensor 20 Temperature sensor

Claims (2)

[Claims] 1. A humid flame-retardant fed in a batch system is first carbonized by flameless heating, and then the carbonized humid flame-retardant is incinerated by a flame, and the combustion gas generated by the incineration is discharged into a flame. A method for incinerating high-humidity flame-retardant materials, which is further burned by passing through. 2. A carbonizing chamber for flamelessly heating and humidifying the humid flame-retardant material charged in a batch mode, and b) a carbonized humid flame-retardant material provided at a rear lower portion of the carbonizing chamber, wherein the carbonized humid flame-retardant material is flamed. A humid and flame-retardant incinerator comprising: a main combustion chamber for incineration; and c) a re-combustion chamber for further burning the combustion gas generated by the incineration in the main combustion chamber with a flame.