Central feed rotary automatic ash discharge stoker
AssigneeDetroit Stoker Company
InventorHarold L. Knox
Life of this patent
Estimating the term…
Abstract
The rotary stoker has a fuel supporting grate which is divided into a central stationary section and an outer rotating ring. Fuel is fed to the center of the stationary section. The outer ring is downwardly and centrally inclined, as an inverted cone, and lies partially beneath the stationary section to form an annular trough of V-shaped cross section. Openings or spaces separate the stationary section and outer ring, in the bottom of the trough, for continuous ash removal into a hopper as the ring rotates. Air may be admitted through the under sides of both sections of the grate from separately controlled air plenums. Air may also be admitted above the grate from a third, separately controlled air plenum.
Claims46
A rotary stoker for use in a combustion chamber comprising:
- (a) a grate for supporting burning fuel, said grate comprising a central stationary section and an outer rotating ring, said outer rotating ring having a rotating fuel supporting surface generally disposed in a downwardly and inwardly converging conical configuration;
- said central stationary section and said fuel supporting surface downwardly converging and overlapping to form a circular vertex lying within the radial confines of said combustion chamber;
- (b) a compartment located directly under said grate for supplying pressurized air through said grate to the fuel supported thereon;
- (c) air supply means for supplying pressurized air to said compartment;
- (d) means for continuously removing ash from said grate;
- and
- (e) means for rotating said outer ring with substantial circumferential movement about said central stationary section.
A rotary stoker for use in a combustion chamber comprising:
- (a) a grate for supporting burning fuel, said grate comprising a central stationary section and a downwardly and inwardly sloping fuel supporting outer rotating ring, said central stationary section and said outer rotating ring downwardly converging to define an annular fuel carrying trough of generally V-shaped radial cross-section the lowermost portion of said trough disposed within the radial confines of said combustion chamber;
- (b) a compartment located directly under said grate for supplying pressurized air through said grate to the fuel supported thereon;
- (c) air supply means for supplying pressurized air to said compartment;
- (d) means for continuously removing ash from said grate;
- and
- (e) means for rotating said outer ring with substantial circumferential movement about said central stationary section.
A rotary stoker for use in a combustion chamber having a chamber wall comprising:
- (a) a grate for supporting burning fuel, said grate comprising a central stationary section and an outer rotating ring, said outer rotating ring being detached from said chamber wall and including means for downwardly and inwardly inclining said outer rotating ring;
- said central stationary section and said outer rotating ring downwardly and inwardly converging and overlapping to define a circular fuel supporting vertex lying within the radial confines of said combustion chamber walls;
- (b) a compartment located directly under said grate for supplying pressurized air through said grate to the fuel supported thereon;
- (c) air supply means for supplying pressurized air to said compartment;
- and
- (d) means for removing ash from said grate.
Dependencies are inferred from the claim text.