JPS57187520A - Boiler for burning ash-rich fuel - Google Patents

Abstract

PURPOSE:To lower the height of a boiler by forming plural ash outlets at the bottom of a furnace by inclining the sloped surfaces of a front wall tube, a rear wall tube, and a side wall tube at angle above the reposing angle of ash. CONSTITUTION:An annular inlet tube gang 4 is provided at the bottom of a furnace. A front wall tube 51 is formed from the inlet tube gang 4 to constitute a horizontal face 11 and also the inclined face of the furnace bottom and the vertical face 13 of the front wall by rising. The rear wall tube 52 is formed from the inlet tube gang 4 to constitute a horizontal face 14 and also to the inclined face 15 of the furnace bottom and the vertical face 16 of the rear wall. Each tube at the central part enters horizontally the inside of the furnace to constitute a horizontal face 17, returns horizontally to the side of the furnace along the inclined face 18 to constitute the inclined face 18 at the central part of the furnace, and rises further to form the vertical face 19 of the side wall. The inclined faces 12, 18, and 15 of the furnace bottom are at angles above the reposing angle of ash, and the lower part of these inclined faces is led to an ash outlet 2 and an ash treatment apparatus 3.