Forgasservarmekjele for faste brennstoffer, spesielt for ved

摘要

The invention relates to a heating boiler to burn solid fuels characterized in that the fuel and gasification chamber (1) exhibit a pear-shaped cross-section converging underneath towards the middle in an apex line. In the area of the apex line and on its center, a slot-like grate (2) extends approximately 1/5 to 1/3 the length of the apex line. Openings (4) above both sides of the top part of the grate have been mounted for the primary air inlet. A slot-like pilot light (5) is placed in the area beneath the grate, the length of which corresponds approximately to that of the grate and which serves as a connection to the combustion chamber. The combustion chamber is divided by a slightly tilted horizontal wall (9) in a precombustion and mixing chamber (7) and an postcombustion chamber (8) lying beneath thereof. Both chambers show a reniform cross-section, which continuously expands as its extends in the direction of flow. The secondary air guided by an air inlet pipe and the air preheater flows into the precombustion and mixing chamber. A deflecting and postcombustion chamber (10.2) is situated at the outlet of the precombustion and mixing chamber and at the inlet of the postcombustion chamber. An additional postcombustion chamber is mounted between the outlet of the postcombustion chamber and the flue gas exhaust (18) through which the air inlet pipe for secondary air preheating is introduced.