HOT-WATER BOILER Russian patent published in 2003 - IPC

FIELD: power engineering. SUBSTANCE: proposed hot-water boiler has housing with furnace chamber and fire tubes, gas burner and noise suppressor. According to first design version, noise suppressor is made in form of Venturi nozzles installed in outlet sections of fire tubes, and according to second design version, noise suppressor is made in form of central cylindrical body installed lengthwise the fire tubes along their axis with formation of ring clearance between inner wall of fire tube and outer surface of central cylindrical body. EFFECT: improved efficiency of noise damping at operation of hot-water boiler. 3 cl, 4 dwg