Blow-off and steam silencers for power plants and other industries
BBM Acoustic Technology Blow-off and steam vent silencers for power plants and other industries
BBM blow-off and steam vent silencers
BBM Acoustic Technology, is one of the leading suppliers for blow-off and steam vent silencers. We offer the whole range of silencers for all kinds of blow-off, vent and other release processes:
Profiting from several decades of experience, BBM Acoustic Technology has developed the most efficient silencers with the longest design life. We did the first tests to develop diffuser silencers to optimise acoustic performance and mechanical design. Along with a lot of site experience, we are leaders in the design, fabrication, and delivery of silencers.
Tailor-made for each individual project, BBM Acoustic Technology silencers are designed, engineered, manufactured, delivered, and – upon request – installed. They are to be found in operation worldwide and can be distinguished by the following characteristics.
Our silencers can be found in many industries; on HRSG boilers, all kinds of fired boilers, and all types of power plants. For temporary applications (e.g. steam purging of pipes before plant start-up), we provide suitable blow-off silencers for rent.
This experience enables us to optimize the expansion stages and the subsequent absorbing baffles in order to guarantee the acoustic requirements while minimizing costs, dimensions and weights, at the same time.
Acoustic design and calculation
The expansion of compressed gas or steam is combined with a transformation into acoustic energy, with which enormous sound power levels can be emitted.
Our silencers are specially designed for applications downstream of safety or pressure control valves. The design and calculation process requires the following data: medium, mass flow, pressure and temperature upstream of the valve.
The acoustic design covers two main steps: the determination of the non-silenced sound power level and calculation of the silencer itself.
Sound power level can be determined by the valve supplier or calculated by BBM Acoustic Technology using formulas based on international standards, improved and verified by the Müller- BBM scientists.
The acoustic design of the silencer components is strongly influenced by the allowable silencer back pressure. BBM Acoustic Technology offers an important contribution to early design process to optimise the system of valve, pipes and silencer with regard to sizes and costs. Our silencers basically consist of an inlet pipe with a radial multi-stage expansion unit and – if required – an absorption section, so that the noise reduction in totalcan be more than 60 dB.
Numerous measurements taken at installed silencers in situ verify the acoustic and mechanical engineering.
3-D design, associated detailed engineering, strength calculations
BBM Acoustic Technology develops a 3-D model of every silencer. These models can be provided to cross check the supports and guidelines in the clients system and will be used for in-house ANSYS calculations to verify resistance against external loads and temperature induced tensions etc.
BBM Acoustic Technology offers comprehensive detailed engineering of the system from the valve outlet to the silencer outlet, i.e.
selection of silencer back pressure and the pipe sizes with regard to flow velocity, pressure drop, flow noise and low costs of the total system
design of the support and guiding system with regard to the thermal movements and all external loads under consideration of existing steel structures
design of external insulations with regard to acoustic requirements and safety against high temperatures
Design codes, materials and manufacturing
BBM Acoustic Technology considers the silencer‘s expansion unit as a pressure part, which will be designed in accordance with pressure codes based on clients‘ preference (B31.1, B31.3 ASME8 Div1 for ASME materials, EN13445, AD2000 for EN materials). Inlet pipe material can be selected up to X10Cr MoVNb9-1 (1.4903) for temperatures above 600°C.
BBM Acoustic Technology applies PED 97/23/EC and confirms compliance for European sites including CE-marking.
The following shows the comprehensive range of our projects:
Your benefits from projects with BBM Acoustic Technology
Access to all the experience of the Müller-BBM Group
Acoustic design of the entire system from the valve
Outlet to the silencer outlet
High standards for engineering, strong compliance with
Guarantee for mechanical design and acoustics
Selected pressure vessel code
Own workshop in Germany ensures high quality and in
On time delivery
Inspection and documentation of each silencer