Coal or multifuel burner

摘要

The object of the invention is to permit, for operation with coal by itself, easy adjustment of the flame length without varying the gas flow and with a relatively stable flame divergence. The burner according to the invention comprises a cylindrical tube (1) through which an air/fuel mixture is ejected into the flame, and inside which a coaxial cylindrical part (6) can move along the axis in order to permit adjustment of the output speed of the gas. Advantageously, this part (6) constitutes a means for injecting air and fuel-oil for mixed operation or operation with fuel-oil by itself.