Furnaces – Process – Incinerating refuse
Patent
1997-01-08
1999-01-26
Lazarus, Ira S.
Furnaces
Process
Incinerating refuse
110342, 110344, 110347, 110204, 110210, 110214, 110219, 110220, 110222, 110233, 110234, 110235, 110248, 110255, 110263, 110266, F23G 500, F23G 5033, F23G 516, B09B 300
Patent
active
058627626
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method and facility for refuse incineration in a refuse disposal system.
BACKGROUND OF THE INVENTION
Conventionally, a refuse incineration facility for incinerating urban refuse for disposal is provided with a fire-grate-type refuse incinerator. Sometimes there is provided a fluid bed incinerator. In addition, an ash fusion furnace is often installed for reducing the volume of incineration ash discharged from the refuse incinerator and for rendering it harmless.
Recent urban refuse is characterized by an increase in the volume of plastics contained in the refuse and an increase in the amount of refuse as a whole.
The fire-grate-type refuse incinerator is very effective because refuse, other than bulky refuse, can be fed into the incinerator as is without being comminuted. However, when refuse containing plastics in an amount of 30% by weight or more is incinerated, there is the possibility that molten plastics will flow down under the fire grate to damage it or to cause a fire accident. Thus, the firegrate-type refuse incinerator has a problem in that it cannot accommodate refuse containing a large amount of plastics. Furthermore, incinerators must be made larger to accommodate increasing amounts of refuse. In a flat bed combustion system, combustion takes place on the surface of a fire grate. The fire grate may be damaged if it is required to support too large a load. Thus, the volume of refuse which can be incinerated in a typical refuse incinerator is said to be limited to 1000 tons per day.
On the other hand, the fluid bed incinerator is suitable for incineration of refuse containing a large amount of plastics because material to be incinerated is incinerated through suspended combustion while the material is caused to float and flow in a fluid layer. However, since the fluid be incinerator requires much power for breaking and fluidizing refuse, the volume to be incinerated in generally limited to 200 tons as day, and it is difficult to increase the volume.
DISCLOSURE OF THE INVENTION
The present invention is intended to provide a method and a facility for refuse incineration which can efficiently incinerate refuse containing a large volume of plastics with a fire grate incinerator, and which can dispose a large volume of refuse.
To attain this objective, a method for incinerating refuse according to the present invention comprises a preprocessing process for preprocessing combustible, said preprocessing process comprising a first comminuting step for primarily comminuting combustible; a separation step for separating metal and noncombustible from the comminuted combustible; a second comminuting step for secondarily comminuting the separated comminuted non-combustible; and a classification step for classifying the comminuted combustible into coarse combustible and fine combustible; wherein the pre-processed and formed coarse combustible is fed onto a fire grate of a refuse incinerator for combustion in a primary combustion chamber, the pre-processed and produced fine combustible being supplied as fuel to a combustion burner for a secondary combustion chamber which is provided above the primary combustion chamber of the refuse incinerator.
A refuse incineration facility according to the present invention comprises a pre-processing facility comprising a first comminutor for primarily comminuting combustible, a metal sorter for sorting metal from the comminuted combustible, a non-combustible separator for separating non-combustible from the comminuted combustible, a secondary comminutor for comminuting coarse combustible after the separation, and a classifier for classifying the secondarily comminuted combustible into coarse combustible and fine combustible; a refuse incinerator formed with a primary combustion chamber on a fire grate for incinerating the combustible processed in the pre-processing facility, and with a secondary combustion chamber thereabove; a coarse combustible supply line for supplying the coarse combustible separated by
REFERENCES:
patent: 3670669 (1972-06-01), Hoad
patent: 3938449 (1976-02-01), Frisz et al.
patent: 3951081 (1976-04-01), Martin et al.
patent: 3955512 (1976-05-01), Martin et al.
patent: 4015546 (1977-04-01), Paules
patent: 4121524 (1978-10-01), Voelskow et al.
patent: 4270470 (1981-06-01), Barnett et al.
patent: 4682548 (1987-07-01), Peng
patent: 4977837 (1990-12-01), Roos et al.
patent: 5052310 (1991-10-01), Goff et al.
patent: 5372077 (1994-12-01), Yen et al.
Isotani Hiroshi
Kaketa Kenji
Kashiwabara Kenji
Okigami Noboru
Onishi Hiroshi
Ciric Ljiljana V.
Hitachi Zosen Corporation
Lazarus Ira S.
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