Furnaces – Refuse incinerator
Reexamination Certificate
2000-10-03
2001-11-27
Wilson, Pamela (Department: 3749)
Furnaces
Refuse incinerator
C110S251000, C110S234000, C110S297000, C110S309000, C110S348000
Reexamination Certificate
active
06321665
ABSTRACT:
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates in general to an incinerator for use in waste management.
(2) Description of the Related Art
Occurrence of toxic substances including dioxin has become a major problem when industrial wastes and other wastes are incinerated. One of the known incinerators has a main body in which is installed an air-heating pipe on the top of a combustion chamber and air supply pipes at the bottom of the combustion chamber. Each air supply pipe is double structured, consisting of an outer water pipe and an inner pipe. In this incinerator, compressed air heated in the air-heating pipe will be blown out from the air supply pipes and circulate in the combustion chamber when it is blasted out from the air supply branch pipes and the water pipes.
The lower half of the incinerator main body is covered with an air chamber cell casing, and an air chamber which is connected to the combustion chamber by auxiliary air supply branch pipes that protrude from a water jacket. The auxiliary air supply branch pipes are installed parallel to the height of the incinerator main body. Air which is blown out from the auxiliary air supply pipes further supplies oxygen to the combustion chamber and blows off the ashes of the combusted waste. Air can easily be supplied to the furnace bottom, furnace wall and furnace center from the air supply branch pipes installed on the furnace bottom and the walls if the furnace is small in size. However, air does not reach the furnace center if the incinerator becomes large in size, which results in imperfect combustion due to a lack of oxygen, especially if the air blown out from the walls is blocked by ascending currents of the flames generated in the furnace, which results in poor combustion efficiency.
Imperfect combustion causes the generation of ashes of toxic substances including dioxin that has become a critical issue that needs to be addressed. Furthermore, wastes of different forms, such as liquid, sludge, high moisture wastes, and solid liquefaction burning, require different incinerators.
BRIEF SUMMARY OF THE INVENTION
The incinerator provides combustion efficiency for various wastes of various forms, and seeks to minimize generation of dioxin and imperfect combustion. This will enable the incinerator to operate continuously, even if the incinerator is large.
Accordingly, it is a primary object of the present invention to provide an incinerator for use in a variety of forms of waste management.
According to one aspect of the present invention, there is provided an incinerator for use in waste management comprising a combustion chamber located in the incinerator having, a plurality of U-shaped air supply pipes protruding toward the center of the combustion chamber for air to be well supplied to the combustion chamber so as to enhance combustion, and a plurality of air supply branch pipes are installed on one side of the air supply pipes for maintaining air circulation in the combustion chamber.
Preferably, the air supply branch pipes are located on the upper and lower end portions of the air supply pipes.
Also, preferably, pairs of diametrically opposed air supply branch pipes may be installed spaced equidistantly along central vertical portions of the air supply pipes. Alternating pairs may be staggered at right angles to each other. For example, one pair may be oriented radially and the adjacent pair(s) oriented circumferentially in an exemplary round chamber.
Alternatively, groups of four air supply branch pipes may be installed spaced equidistantly along the central vertical portion of the air supply pipe. The groups may be staggered with, adjacent groups oriented rotated approximately 45° about the air supply pipe.
Preferably, the air supply pipe is double structured having a water pipe connecting the air supply pipe to a water jacket and an inner pipe mounted inside the water pipe which is connected to an air chamber. The air supply branch pipes extend from the inner pipe and penetrate the water pipe.
Preferably, an air-heating pipe is installed on top of the incinerator for enabling high temperature and compressed air to be supplied into the combustion chamber and the air-heating pipe and the combustion chamber are linked with the air supply pipes.
Also, preferably, a steam generator is installed on top of the incinerator for enabling steam to be supplied into the combustion chamber and the steam generator and the combustion chamber are linked with the air supply pipes.
The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.
REFERENCES:
patent: 282035 (1883-07-01), Baker
patent: 1106093 (1914-08-01), Hahle
patent: 3369505 (1968-02-01), Reusser
patent: 3457883 (1969-07-01), Ankersen
patent: 4278034 (1981-07-01), Reale
patent: 4306506 (1981-12-01), Rotter
patent: 4311103 (1982-01-01), Hirose
patent: 5009173 (1991-04-01), Temelli
patent: 5177953 (1993-01-01), Firey
patent: 5836258 (1998-11-01), Ruegg et al.
patent: 6058622 (2000-05-01), Sandor
patent: 6058857 (2000-05-01), Nakai et al.
U.S. application No. 09678568, Sanbonmatsu, filed Jan. 1997.
Evergreen Planet SDN BHD
Rinehart K. B.
Wiggin & Dana
Wilson Pamela
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