Furnaces – With fuel treatment means – Means for liberating gas from solid fuel
Reexamination Certificate
2000-10-31
2001-12-04
Bennett, Henry (Department: 3749)
Furnaces
With fuel treatment means
Means for liberating gas from solid fuel
C110S230000, C110S240000, C110S241000, C110S259000, C110S203000, C110S309000, C110S310000, C110S323000
Reexamination Certificate
active
06325000
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a waste incineration machine for burning mainly garbage, and more particularly to a small-sized waste incineration machine capable of removing smoke and odor occurring during the combustion of waste.
2. Description of the Related Art
The techniques for secondarily burning a waste gas, which occurs when waste is burnt, by an after-burner provided so as to render the waste gas smokeless and odorless have heretofore been known. These techniques include as shown in, for example, Japanese Patent Laid-Open No. 225,015/1995, the techniques for providing a secondary combustion burner in a secondary combustion chamber connected to a primary combustion chamber, and completely burning a waste gas, which occurs in the primary combustion chamber, by the secondary combustion burner so as to render the waste gas smokeless.
The techniques for providing a far infrared ray radiant material in an incineration machine, and secondarily burning a waste gas with far infrared rays to render the waste gas smokeless, are also known. Such techniques include techniques disclosed in, for example, Japanese Patent Laid-Open No. 324,719/1995, in which a net cylinder is provided in a combustion chamber in an incinerator with a space between the net cylinder and an inner wall surface of the combustion chamber filled with a far infrared ray radiant material. In this incinerator, waste is burnt in the net cylinder, and a waste gas occurring therein flows up as it passes through a layer of the far infrared ray radiant material, whereby the waste gas is completely burnt and discharged to the outside.
However, since the waste incineration machine disclosed in the former publication requires a secondary combustion chamber and a secondary combustion burner, not only the dimensions of a machine body but also the combustion cost increases. Therefore, this waste incineration machine is unsuitable to be used as a small-sized waste incineration machine.
Since the waste incineration machine disclosed in the latter publication is provided with a chimney just on an upper portion of the combustion chamber, a waste gas passes upward at a high speed. Consequently, the waste gas is discharged from the chimney to the outside, and the waste gas goes outside without having received the sufficient radiation of the far infrared rays. Thus, there is the possibility that the waste gas is not completely burnt and cannot be rendered smokeless.
SUMMARY OF THE INVENTION
The present invention has been made in view of the above-mentioned circumstances, and provides a waste incineration machine which solves these problems, and which is capable of rendering a waste gas discharged during the combustion of waste smokeless and odorless without providing an after-burner.
The present invention also provides a waste incineration machine capable of obtaining hot water by utilizing the heat of a waste gas, reducing the temperature of a waste gas and preventing an increase in an ambient temperature of the incineration machine.
According to an aspect of the present invention, the waste incineration machine includes a combustion furnace, a combustion chamber provided under the combustion furnace, a first far infrared ray radiator provided so as to surround the combustion furnace and combustion chamber, a heat exchanger provided so as to surround the first far infrared ray radiator, an inner flue formed between the first far infrared ray radiator and combustion furnace, an outer flue formed between the first far infrared ray radiator and heat exchanger and communicating with the inner flue, a second far infrared ray radiator provided above a communication portion between the inner and outer flues, and waste gas discharge ports provided in the combustion furnace so as to face the communication portion or inner flue.
According to another aspect of the present invention, the first far infrared ray radiator of the waste incineration machine is formed into a substantially cylindrical shape, the heat exchanger being formed into a rectangular box-shape open at the top and the bottom.
According to still another aspect of the present invention, the outer flue of the waste incineration machine is provided at a lower portion thereof with ventilating ports, in which dampers are provided.
According to a further aspect of the present invention, the combustion furnace of the waste incineration machine is provided with an air blowout port, to which a blower is connected via a blast pipe, an openable shutoff member being provided in the blast pipe so that the air does not enter the air blowout port.
REFERENCES:
patent: 2199139 (1940-04-01), Murphy
patent: 5029534 (1991-07-01), Childs
patent: 5184539 (1993-02-01), Oiwa
patent: 5363777 (1994-11-01), Yoshimoto et al.
patent: 5632197 (1997-05-01), Lubawy et al.
patent: 5727482 (1998-03-01), Young
patent: 6073541 (2000-06-01), Oiwa
patent: 7225015 (1995-08-01), None
patent: 7324719 (1995-12-01), None
Arent Fox Kintner & Plotkin & Kahn, PLLC
Bennett Henry
Meito Corporation
Rinehart K. B.
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