Boiler specifically designed for burning fat and semifat coals, including an improved cleaning grill

摘要

Boiler adapted to be supplied with fat or semifat coals, which are coals with a high content of volatile substances and which tend to self-compacting during burning thereby preventing, in conventional boilers, a proper distribution of the combustion air.;The boiler comprises a grill (1) which is mount­ed on a slanting frame (9) and consists of a plurality of adjoining elements (3) having slots (5) through which different­ly shaped blades (7, 8) are reciprocated, the blades being articulated on a movable frame (9) which may be displaced in parallel planes and parallely to the grill, by means of a coupling rod-crank mechanism (18, 19).