FIELD: cleaning heat-transfer agents, especially walls of fuel chamber of steam boilers. SUBSTANCE: to make water-spraying tube all-moving in one plane without contamination and to make jet escaping from nozzle move accurately over preset trajectory on opposite wall of boiler, mouth of nozzle tube 1 is provided with flange secured on wall 4 of furnace chamber. Rear part of nozzle tube 1 is located in guide 5 which is movable horizontally on vertical spindle 6 at top and on horizontal spindle (7,8) at bottom. Guide 5 is made in form of housing 9 which is fitted on vertical spindle 6 without turn. It carries fork-shaped seat 10 projecting aside; fitted rotatably on transverse axle of this seat is cage 11 made in form of sleeve 12 in its inner portion where nozzle tube 1 is mounted for axial motion. EFFECT: enhanced efficiency. 6 cl, 6 dwg
