Industrial Exhaust Silencers
Industrial process silencers provided by SysTech attenuate noise from many types of industrial process equipment. Silencer design, with an understanding of the application, equipment, and process, is critical when it comes to meeting specific noise attenuation requirements. Industrial process silencers cover a broad range of applications including PD blowers, compressors, vents, stacks, and mufflers, while all having the capability of different frequency bands to address each application’s unique requirements. The silencers provided by SysTech attenuate noise from many types of industrial process equipment. Silencer design, with an understanding of the application, equipment, and process, is critical when it comes to meeting specific noise attenuation requirements.
Fan Silencer Technologies
There are three basic types of silencers:
- Absorptive and dissipative silencers – are lined with sound-absorbing materials such as mineral wool or fiberglass to attenuate sound waves. They are most effective with mid and high-frequency noise.
- Reactive chamber silencers – target low-frequency noise. Multiple chambers with differing internal cross-sections are used to reflect noise energy back to the source.
- Absorptive/Reactive – A combination of both the absorptive and reactive designs. Design covers a broader range of frequencies to meet stricter attenuation requirements.
Positive Displacement (PD) Blower Silencers
PD Blower silencers are designed specifically to their application, which is oftentimes low-frequency pulse noise. They may be a reactive or reactive-absorptive style depending upon where they are positioned in the process. Silencers may be positioned on the inlet or outlet, or on both, depending upon the process application.
Compressor Silencers
Reciprocating and centrifugal compressors may require reactive, reactive-absorptive, or absorptive type silencers depending upon their frequency band noise characteristics.
Silencer design takes the following factors into account:
- Configuration of your compressor
- Temperature limits
- Pressure rating
- Application requirements
Stack Silencers
Stack silencers are essential in controlling noise produced in industrial stack exhaust. A number of stack silencer designs for new and retrofit stack installations are available. Every stack silencer is custom-designed around the following parameters:
- Acoustic targets
- Flow requirements
- Pressure drop
- Temperature
- Discharge velocity
- Particulate loading
- Structural integrity
Stack silencers can be supplied as stack inserts for quick installation, integrated into the base of stacks, or attached to the top of stacks. They can be provided with or without casings, or in kit form for site assembly on very large diameter systems.
Optional materials of construction include alloy steels, FRP, and CPVC with fabric, film, and mesh baffle liners. Cleanable and removable liner/bullet designs are available for dirty applications, as well as high-temperature designs.
Vent Silencers
The venting of high-pressure gases results in very high noise levels. Vent silencers coupled with a pressure relief valve are applied in vent and blowdown applications for pressurized steam, natural gas, carbon dioxide, as well as other gases, including pressurized air. Vent silencers are found in:
- Boilers
- Heat Recovery
- Gas Compressor Stations
- Chemical Processing
Industrial Mufflers
Reciprocating engines are widely used in applications ranging from power generation, gas transmission and storage, to marine and manufacturing processes.
Industrial mufflers may be reactive, reactive-absorptive, or absorptive style dependent upon application. Application-specific engine and operating conditions require the correct combination of muffler properties for the best results. Engine muffler design is based upon:
- The type, size, and end-use of the engine
- The degree of silencing required
- Flow and temperature conditions
- Application requirements
Industrial Exhaust Silencers
An Integral Part of an Industrial Ventilation System
The noise attenuation needs in an industrial facility are mandatory for most process exhausts and are typically specified along with the rotating machinery. The extreme noise levels frequently require exhaust attenuation to meet Codes or plant EHS regulations.
