Incinerator and heat recovery system for drying wood poles
OwnerEdward T. Douglass, Jr.inventor
Life of this patent
Estimating the term…
Abstract
An incinerator system utilizes recovered heat from the incineration of wood waste left by harvesting of forests to dry green wood products. An automatic feeder loads waste wood into a furnace which discharges combustion gases through a stack wherein a spiral air flow is induced to separate a portion of the gas carrying cinders and sparks from the axial movement of the remainder of gas. The cinder laden hot gases pass through a precipitation chamber where the cinders are recovered and returned to the furnace. The de-cindered gas is then admitted to a kiln via a modulating damper to dry wood.
Claims11
Apparatus for supplying drying heat to a kiln or the like comprising:
- (a) a furnace having a forced air system for introducing combustion air thereinto;
- (b) means for supplying fuel to said furnace;
- (c) a cylindrical open ended stack extending upwardly from said furnace in communication therewith for conveying combustion gases upwardly;
- (d) a plurality of angularly spaced inlet conduits extending outwardly and downwardly from said stack proximal said furnace, whereby cooler air is introduced thereunto through tangential openings in said stack such that an upward spiral airflow is induced within said stack;
- (e) a plenum encircling the uppermost portion of said stack and communicating therewith through a plurality of elongated parallel ports inclined relative to the longitudinal axis of said stack;
- (f) conduit means connected to said plenum for receiving gases therefrom;
- (g) means for creating a pressure differential within said conduit means whereby gases from said stack are drawn thereinto;
- (h) means communicating with said conduit for removing cinders entrained by said gases drawn into said conduit and returning said cinders to said furnace;
- and
- (i) means for controlling the temperature within said kiln by diverting gases drawn through said conduit thereinto after said cinders have been removed.
A method for recovering heat from an incinerator for use in drying flammable products comprising the steps of:
- (a) incinerating organic material in a furnace having an elongated stack thereon for discharging gases created thereby, with said organic material being fed into said furnace at a predetermined rate;
- (b) introducing air from the atmosphere to said stack proximal said furnace such that a spiral flow of said gases within said stack is induced;
- (c) withdrawing a portion of hot gases and cinders entrained therewith radially through apertures in said stack while discharging the remainder of said gases axially of said stack;
- (d) removing said cinders from said portion of said gases;
- and
- (e) heating a kiln to a predetermined temperature with said portion of said gases subsequent to the removal of said cinders.
Dependencies are inferred from the claim text.