Furnaces – With fuel treatment means – Preliminary refuse treatment means
Patent
1997-01-24
1998-05-12
Bennett, Henry A.
Furnaces
With fuel treatment means
Preliminary refuse treatment means
110235, 110257, 110259, 110248, F23G 502
Patent
active
057493073
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a refuse incineration facility for continuously performing incineration of refuse and melting of incineration residue.
BACKGROUND OF THE INVENTION
A vertical moving bed furnace has been conventionally known as an incinerator which can continuously perform incineration of refuse and melting of incineration residue such as incineration ash produced from incineration. It feeds waste from the top, supplies oxidant (air or oxygen enriched air) into the bottom, and burns waste at the lower part of the fluidized bed and melt residue with heat of its combustion.
However, in the vertical moving bed furnace, since the waste and the oxidant constitute counterflow, and pyrolysis gas generated from the waste flows out upward together with exhaust gas, temperature is low in a melting chamber at the bottom of furnace, so that the residue cannot be burnt only with heat value generated from burning of the waste. Thus, coke is fed as pilot fuel to provide ventilation effect as well to melt residue with heat obtained from the coke. Therefore, coke which is valuable resource is used, so that there is a problem that the disposal cost is increased.
DISCLOSURE OF THE INVENTION
The present invention is intended to provide a refuse incineration facility which can dispose waste at a high efficiency, and reduce incineration cost.
To attain the object, the refuse incineration facility of the present invention comprises a pretreatment facility for pretreating waste, and an incineration/melting facility for heating and incinerating the waste treated by the pretreatment facility, and then for continuously melting its residue: said pretreatment facility comprising a coarse crusher for crushing the waste; a coarse crushed material classifier for classifying light crushed material mainly consisting of combustible and heavy crushed material containing much noncombustible from the coarse crushed material crushed by the coarse crusher; a recyclable separator for separating and removing recyclable metals from the heavy crushed material; and a fine crusher for further crushing light crushed material discharged from the coarse crushed material classifier; said incineration/melting facility comprising an incineration chamber for heating and incinerating the material to be incinerated; a melting chamber formed integrally with the incineration chamber, being capable of continuously transferring incineration residue generated in the incineration chamber from the incineration chamber, and having a burner; fuel supply means for introducing part or all of the fine crushed material crushed by the fine crusher into the burner in the melting chamber; and crushed material supply means for introducing the heavy crushed material separated by the recyclable separator and remaining fine crushed material crushed by the fine crusher into the incineration chamber.
In the pretreatment facility with the above arrangement, after the waste is coarsely crushed by the coarse crusher, the coarse crushed material is fed to coarse crushed material separator and the recyclable separator, and separated into light crushed material mainly consisting of combustible and the heavy crushed material containing much noncombustible by the coarse crushed material separator. Then, the heavy crushed material is fed to the recyclable separator where recyclable metals are separated and removed. Thereafter, heavy separated waste is fed to the incineration chamber of the incineration/melting facility through the crushed material supply means. In addition, light crushed material is fed to the fine crusher where it is further crushed. Part or all of it is fed to the burner in the melting chamber through the fuel supply means, and the remainder is fed to the incineration chamber through the crushed material supply means for burning and incineration. Then, in the incineration chamber, the heavy crushed material and the remaining fine crushed material are heated and burnt, and the incineration residue is continuously fed from the in
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Okigami Noboru
Sasaki Kunio
Sekiguchi Yoshitoshi
Shimotani Hideo
Terashima Masaharu
Bennett Henry A.
Hitachi Zosen Corporation
Tinker Susanne C.
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