Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1982-03-03
1983-07-12
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181251, 181252, 181268, 181272, F01N 700
Patent
active
043925499
ABSTRACT:
A boiler noise suppressor has one truss (2) mounted on a cover of an inlet flange (1), a perforated expansion nozzle (5), a pipe system (7) made of a several hundreds of pipes, a perforated outlet nozzle (8), at least one truss (11) mounted on a collar of the outlet nozzle. The pipe system (7) can be additionally cooled in a parallel-current- or a counter-current manner preferably by air or water. The boiler noise suppressor can be connected directly to the exhaust of blow-out steam of a single boiler or in a parallel connection to form batteries of suppressors by a connection with exhausts of blow-out steam from several boilers. The application of the noise suppressor renders it possible to reduce the noise level by more than 50% from 140-160 dB to 70-80 dB.
REFERENCES:
patent: 2075316 (1937-03-01), Tyden
patent: 4113048 (1978-09-01), Teodorescu
"Noise Control in Communication and Industry" by P. Roginski et al., Warszawa, 1965, p. 342, lines 16-33.
"Aviation Noise and Methods of Its Control" by T. Rajpert, Warszawa, 1980, p. 291, lines 2-9, FIG. 5-25.
Wegrzyn Ryszard
Wrobel Stanislaw
Fuller Benjamin R.
Handal Anthony H.
Instytut Chemii Nieorganicznej
Meller Michael N.
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