Sanitary Sound Attenuators - SOUNDCIP™

The Sanitary Sound Attenuator SOUNDCIP™ is designed and engineered to achieve maximum insertion loss with minimum pressure drop. The unit is designed for efficient aerodynamic performance and is constructed with superior acoustical and stainless steel materials ensuring the reliability and performance.

The main applications are the installation of sound attenuator in the spray dryers and fluid bed dryers exhaust systems for food, dairy and pharmaceutical products. As the entire unit can be Cleaned-In-Place (CIP) between the product changes, the sound attenuator is also suitable for other product applications.

Exclusive features and advantages

• Low frequency attenuators and attenuation over the acoustic spectrum mean high acoustic performance.
• Low-pressure drop across the attenuators means long baffle life, reduced energy consumption and noise emission.

• Each attenuator selection is computer modelled against the specific application, for optimum cost effectiveness and performance. The model draws on an extensive database of live applications, which allows for a guaranteed performance.
• Hermetically sealed baffles.
• Installation on the exhaust duct of the dryer and connected to the existing CIP system.
• Meet the high demands on cleanliness, sound reduction and cleaning efficiency. CIP by water, caustic and acid solutions with provision for self-draining.
• Fully automatic sequence control during CIP and drying the unit after CIP.
• Low Maintenance due to CIP-system.
• Sanitary Codes applied are in compliance with the 3-A/USDA (Pending) and EN 1672-2.
• A wide range of standardised design configurations (i.e. gas flow range from 6300 to 160000 kg/h) increase the suitability to the building requirements, easy installation on the new and existing dryers.

Design features

The SOUNDCIP™ is optimised with respect to:

• the acoustic properties of the attenuator material
• the thickness of the baffles
• the width and length of the baffles

The Sanitary Sound Attenuator SOUNDCIP™ consists of a rectangular housing (1) with process gas inlet at the bottom and outlet on the upper opposite side of the housing. The housing is equipped with slide rail system for mounting the carrier (3). For quick insertion of baffles (2) and installation of carriers inside the housing, wheels are provided. Each compartment with carriers is equipped with flanged cover plates (4). The housing is equipped with CIP nozzles and a drain facility provided at the bottom.

The waterproof acoustical baffles are made of a sound absorbing material wrapped and sealed in strong thin layer of PTFE-foil. The foil is welded thus providing a waterproof protection of the absorber material. Each carrier comprises of three baffles and stainless steel pipes are formed to accommodate baffles.

The sound attenuator housing is provided with a pneumatically remote controlled cover at the process gas outlet (Optional). The cover remains closed during CIP and when the plant is not operating.

Data Sheet

Niro has developed a Sanitary Sound Attenuator with built-in CIP'able baffle elements, which can withstand normally used CIP cleaning liquids.

The SOUNDCIP™ consists of:

• Attenuator housing
• Baffles of liquid resistant material
• Baffle carriers with built-in CIP equipment

The sound attenuation is 10-15 dB depending on site conditions.

Sanitary Sound Attenuator - SOUNDCIP™