BBM Acoustic Technology
Flue-gas silencers for power plants , Noise control for power plants
BBM flue-gas silencers
BBM Acoustic Technology, is the leading supplier for flue-gas silencers. We supply the whole range of silencers behind the gas turbine and for all kind of boilers. BBM Acoustic Technology has executed several projects worldwide with the most stringent requirements.
BBM scope of supply
For the gas turbine side, we offer all hot silencers, either in the horizontal duct downstream the gas turbine diffuser, in HRSG inlet duct, or in the bypass system for every GT size and temperatures up to 700 °C. For the cold side behind the HRSG, we design silencers in the outlet duct and in the main stack.
Dimensions and materials are selected as per specification. We can supply the absorptive splitters, or both the splitters and the casing with all requested accessories. Acoustic design and calculation Gas turbines are being used more and more in power plants today.
At the same time the acoustic requirements have become more and more stringent. This means silencers are required for almost all installations that include gas turbines and heat recovery steam generators. Our acoustic design covers optimized solutions for the whole system, starting from gas turbine exhaust flange up to stack outlet. BBM Acoustic Technology is one of the first companies that gave guarantees for the whole system, based on our R&D and site measurements.
Gas turbine silencers are exposed to high temperatures and to high velocity turbulent flow. Inhouse CFD studies verify the silencer design, while considering flow noise, pressure drop and mechanical stability. Gas turbine development requires an ongoing improvement of the silencer design.
Our specific design reflects the choice of material according to aero-thermal requirements:
Hot silencers :- stainless steel
Cold silencers :- galvanized or stainless steel
Extremely robust and thermal load resistant design of baffles by using FEM calculations
Manufactured for all duct and stack dimensions required in practice
The baffle infill materials are a key issue. For hot silencers, the absorbing materials are used in pillows with protection layers between perforated sheets and pillows to guarantee a long lifetime.
Specially tuned splitter design for low-frequency attenuation, where the splitter cavities are covered with solid (non-perforated) sheet metal.
Planning, 3-D design, detailed engineering and project management
Today, nearly all projects are represented in a 3-D (CAD) model. The use of this software enables us to check all critical parts to allow a »tailor-made« detailed engineering.
BBM design and development of silencers
Our know-how is based on research conducted at our in-house test facilities and on extensive field measurements, which verify our calculations. All new materials are tested in our own test stands.
Overall concept and cost optimisation
Competent engineers, using powerful computer programs with multiple optimisation routines, design the gas turbine silencers. The results of these programs and our long experience of designing industrial silencers allow us to meet the most rigorous acoustic requirements.
World wide supply and installation
Specialized teams consisting of BBM Acoustic Technology own staff or as combined teams with our partners take care of installation or supervision works.