NOZZLE Russian patent published in 2010 - IPC B05B1/14 B08B9/32 

FIELD: technological processes.

SUBSTANCE: device is intended for application as device of bench for cleaning from scale and sludge deposits from surface of steam generator (SG) tube bundle pipes with further washing and flushing of tube space and internals of SG and their further removal during preventive maintenance of nuclear power plant (NPP). Nozzle is fixed on stem and comprises body with channel for supply of water and steam. Body is communicated with inner cavity of stem body. Nozzle also comprises mixing-damper chamber and two flow nozzles, which are arranged as identical geometrically and are structurally directed towards diametrically opposite sides. Each geometrically identical nozzle is made of two holes communicated by means of gap as equidistant along axes of the latter. Distance between nozzles does not exceed diametre of holes. Area of gap section does not exceed half of each opening flow section.

EFFECT: provides for the possibility to efficiently execute forced supply of cleaning components onto surface of SG tube bundle tubes for cleaning from scale and sludge deposits with further washing and flushing of tube space and SG internals and their further removal beyond its borders.

2 dwg