FIELD: power engineering; furnace devices used in various industries. SUBSTANCE: burner is provided with centering bearing circular upright 13 and threaded spool valve plug 9; shut-off needle is made in form of steam pipe union 11 passed through spool valve plug. Pipe union 11 is provided with steam thread cone 12 having axial calibrated orifice 25. Body 1 of burner, spool valve plug 9 and steam pipe union 11 are provided with coaxial side holes 22 for supply of steam through supply branch pipe; spool valve plug 9 is provided with inner circular bore 23 communicating with side hole 22; diameter of bore exceeds diameter of hole. Steam threaded cone is provided with outer bore supported by centering bearing circular upright 13 having fuel ports 14 over circumference. EFFECT: enhanced efficiency. 1 dwg
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