APPLICATION DETAILS:
Silencer for dust extraction stack
SUPPLY SCOPE:
Supply and installation of circular silencer for dust extraction exhaust stack to reduce noise emissions to nearby residential areas.
To permit installation, the stack was disconnected from the system, lowered, cut on site and re-erected complete with the new silencer. The 1350mm diameter x 3500mm long silencer was designed with thick outer walls to improve the level of low frequency performance.
External surfaces of the unit were painted with a 2-coat epoxy coating.
PRODUCT SELECTION AND PERFORMANCE:
A series of pre-galvanised acoustic enclosures and acoustic attenuators for large industrial fans were designed and manufactured for this large waste to energy plant. The enclosures incorporated a series of hinged and removable access panels along with an attenuated ventilation system.
Duct mounted attenuators were designed to suit the system operational temperatures and pressures with external casings being fabricated from materials up to 8mm thickness.
PROJECT PERFORMANCE:
Equipment was selected to comply with stringent acoustic performances to meet environmental noise limits. Overall performance requirements for the individual items ranged from 36dB(A) to 38 dB(A) reduction which were checked and verified by the clients independent project acoustic consultant.
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