Furnaces – Refuse incinerator – Refuse supported above grate
Patent
1995-04-07
1998-10-27
Bennett, Henry A.
Furnaces
Refuse incinerator
Refuse supported above grate
110255, 422143, 422145, F23G 500
Patent
active
058265198
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is directed to a hearth bed furnace in which a hearth particle bed flows down an inclined surface and a material to be incinerated contacts and is supported in the moving hearth particle bed.
BACKGROUND OF THE INVENTION
A typical particle incinerating furnace in current use utilizes hearth particles to form a hearth particle bed which moves in a non-fluidized fashion to incinerate materials in a combustion chamber. Japanese Patent Specification Hei No. 2-203109 (Kokoku No. 6-56256) operates in such a fashion and has air inlet tubular members for promoting burning which are provided in the furnace facing the hearth particle bed. However, to increase the amount of air introduced into the combustion chamber, it is necessary to enlarge the tubular members with air inlet apertures provided therein and increase the number of these tubular members which consequently m interferes with the movement of the hearth particle bed.
Japanese Patent Application Hei No. 4-358066 (Kokai No. 6-193845) discloses a particle incinerating furnace in which air is introduced to a moving hearth particle bed from air inlets provided at a lower portion of the hearth particle bed to incinerate materials introduced at an upper part of the furnace. In this reference, the air inlets for promoting the burning of the materials come into direct contact with the hearth particles so that the hearth particles often plug the air inlet and become stuck therein. This results in the movement of the hearth particle bed being obstructed and the introduction of necessary combustion air is hindered.
It has been attempted to solve the above-described problems in particle bed incinerating furnaces by reducing the size of the air inlet. However, this may result in a decrease in the amount of combustion air introduced to the furnace and insufficient incineration.
SUMMARY OF THE INVENTION
The present invention overcomes the above-discussed problems by providing a hearth particle bed system utilized in the incineration of materials in a hearth particle incinerating furnace which comprises a first inclined surface; at least one channel member forming a second inclined surface and provided above said first inclined surface; means for introducing hearth particles onto said second inclined surface; a layer of hearth particles flowing down said second inclined surface; air inlet means provided in said first inclined surface for promoting burning of a material to be burned; and air flow redistribution means provided in said channel member for redistributing the air flow through the hearth particle layer.
The present invention also is directed to a hearth particle bed system comprising a first inclined surface; at least one channel member forming a second inclined surface and provided above said first inclined surface; means for introducing hearth particles onto said second inclined surface; a layer of hearth particles flowing down said second inclined surface; air inlet means provided in said first inclined surface for promoting burning of a material to be burned; and a plurality of air flow redistribution apertures provided in sides of the channel member for redistributing the air flow through said hearth particle layers.
A further aspect of the present invention is directed to a hearth particle incinerating furnace comprising a first inclined surface; at least one channel member forming a second inclined surface and provided above said first inclined surface; means for introducing hearth particles onto said second inclined surface; a layer of hearth particles flowing down said second inclined surface; a combustion chamber; air inlet means provided in said first inclined surface for promoting burning of a material to be burned; a plurality of air flow redistribution apertures provided in sides of said channel member for redistributing the air flow through said hearth particle layer; an outlet provided at a lower portion of the combustion chamber; and removal means provided at said outlet for removing a mixture c
REFERENCES:
patent: 4154581 (1979-05-01), Nack et al.
patent: 4330502 (1982-05-01), Engstrom
patent: 4991519 (1991-02-01), Saitoh
patent: 5209169 (1993-05-01), Basic, Sr.
Bennett Henry A.
Tinker Susanne C.
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