GB627758A - Improvements in mechanical stokers - Google Patents

Abstract

627,758. Mechanical stokers. BABCOCK & WILCOX, Ltd., and SUCKLING, J. Feb. 14, 1947, No. 4327. [Class 51 (i)] A mechanical stoker includes a grate below which is provided an air compartment with an air register of which a part that is adjustable in position for regulating the air supply to the compartment is provided with projections extending into the space within the air compartment and adapted so to disturb material accumulated in the compartment and liable to obstruct air flow through the air register as to effect dislodgement thereof through the air register from the compartment. An endless chain grate 1 is supported on longitudinally-extending skid bars 20, 30 secured to spaced cross-beams. Below the grate 1, at both its front and rear ends, Fig. 1, three pairs of apertured plates extend transversely across the grate to control the upward flow of air thereto. Each pair comprises an apertured fixed upper plate 31 and an apertured slidable lower plate 32. The upper plates 31 which are bolted to the cross-beams have upwardly extending edges 45 adapted to form shallow compartments below the grate. The three apertured lower plates 32 are movable together across the grate by a pair of coupling rods 70 operated by a hand lever 60 at the side of the furnace. Each upper or lower plate is formed with a front and a rear row of spaced rectangular bevel-edged apertures 80, or 81 respectively. Each upper plate 32 is formed with two diamond shaped projections 83, while each lower plate 31 has six projections 84 of circular cross-section which extend through apertures in the upper plate so that when the lower plates are moved fused ash tending to block the aperture is broken up and falls through.