ANTI-EROSION DEVICE FOR SHELL-AND-TUBE EQUIPMENT Russian patent published in 2021 - IPC F28F9/16 F28F19/00 

FIELD: power engineering.

SUBSTANCE: invention relates to the field of power engineering. Shell-and-tube equipment (10) comprises casing (12), which encloses tube bundle (14), wherein tube bundle (14) comprises plurality of tubes (16). At least one end of each pipe (16) is provided with connection (26) with inlet tube plate (18) in appropriate holes (20) of tube grid for inlet of fluid medium (F) into shell-and-tube equipment (10). Inlet tube screen (18) has first side (22), which receives fluid (F) from inlet channel located in process chain before inlet tube screen (18), and second side (24), which is opposite to first side (22) and on which pipes (16) are connected. Intake tube grid (18) is connected to each tube (16) of tube bundle (14) on second side (24). Shell-and-tube equipment (10) comprises an anti-erosion device comprising a first - outer - tubular element (30) and a second - inner - tubular element (32) for at least one corresponding pipe (16). Both tubular elements - external (30) and internal (32) - have corresponding longitudinal axis, which is parallel to longitudinal axis of corresponding pipe (16). Both tubular elements - external (30) and internal (32) - have corresponding longitudinal axis, which is parallel to longitudinal axis of corresponding pipe (16). First tubular end (34) of outer tubular element (30) is connected to first side (22) of inlet tube plate (18), while second - free - tubular end (36) of outer tubular element (30) extends into inlet channel. Inner tubular element (32) is inserted into outer tubular element (30) such that, substantially, covers the entire inner surface of outer tubular element (30) and enters at least part of corresponding pipe (16) to some point located outside of connection (26) or second side (24) of inlet tube grid (18), depending on that of them further from external pipe element (30 ). Inner tubular element (32) is connected to outer tubular element (30) by means of mechanical or hydraulic expansion of at least first tubular portion (42) of first inner tubular element (32) at inner surface of outer tubular element (30).

EFFECT: invention enables to protect the tube sheet from erosion.

15 cl, 10 dwg