US 4,307,702 A · Grating structure

Abstract

A furnace for burning dry or wet wood waste products such as hogged bark and the like is provided with a grating therein comprised of aligned rows of bricks resting on supporting cross beams, with at least some of the rows of bricks maintained a uniform distance from other rows of bricks by spacers disposed between such spaced-apart rows of bricks. The furnace is charged by turbulent air entering both above and below the grating, with a select portion of such air being pre-heated. A temperature gradient is established between an area immediately beneath the grating and the area above the grating in the range of 2200.degree. F. and can be controlled by selected initial placement of the bricks and spacers to achieve an optimum cross sectional area for flow of heated, turbulent air through the grating to produce a temperature for efficient heating, drying and burning of wood waste products in an essentially pollution-free manner.

Claims5

Dependent claims

A grating structure for a furnace means having at least one air intake and at least one particulate moisture-containing combustible material input communication with a fire-containing combustion chamber within said furnace means, said grating structure comprising:

a plurality of spaced parallel beams transversing said chamber in a single plane above said air intake and below said combustible material input, said air intake being spaced from said material input;
a plurality of parallel rows of bricks, each of said rows comprised of a plurality of individual bricks arranged in a single plane in surface contact with adjacent bricks and perpendicular to and removably directly supported by said beams;
and
a plurality of spacers removably directly supported on said beams and positioned between at least some adjacent rows of bricks, said spacers maintaining a selected open area between said some adjacent rows of bricks for permitting flow of air from said air intake through said grating structure.

1 more element

Dependencies are inferred from the claim text.

Grating structure

Life of this patent

Grating structure

Life of this patent

Abstract

Claims5