Patent ID: 6343672
Filing Date: 2002-02-05
Classification: F01N,F04C,F16K

Abstract:
A fluid stream pressure and velocity reducing and noise suppressing device comprising in cooperating arrangement:A. an inlet adapted to cooperate with and receive a fluid stream from a stack of a high pressure system; B. an annular base for receiving said inlet; C. an annular cylindrical dissipative swirling member having an internal diameter at least equal to or larger than the diameter of said inlet and an external diameter, said swirling member comprising an annular array of enclosed radially outwardly extending swirling channels, wherein the sum of the minimum cross section areas of said channels is not less than the cross section area of the inlet, said channels having walls defined by a set of vanes mounted on said base around said inlet, to deflect, swirl and discharge said fluid stream in a radially outward and tangential manner; D. a dissipative annular shroud member comprising: (i) a housing mounted on said annular base, having an internal diameter larger than said external diameter of said swirling member; (ii) an inner core mounted on the top of said annular dissipative swirling member, said inner core comprising a first part in the form of a cylindrical segment with a diameter substantially the same as said external diameter of said annular dissipative swirling member, and a second part in the form of a conical segment having a diameter at its base substantially equal to the diameter of said cylindrical segment; and E. a diffuser being mounted upon said housing and having an opening at its lower end at least as large as the internal diameter of said housing and having one or more outwardly sloping walls, said diffuser defining a final opening of a size so that the pressure of the fluid stream at the exit of said diffuser is atmospheric and the velocity of the fluid jet is subsonic, said diffuser being tightly packed with discrete particulate packing and said diffuser having first and second grates to retain said particulate packing in said diffuser.