A muffler is a device that allows airflow to pass, but can prevent or reduce sound propagation, and is an effective tool to eliminate aerodynamic noise. The high-pressure steam enters the pressure reducing body after a primary flow control in the muffler, and the pressure is enlarged by a large volume, thereby forming low-pressure steam and spraying out. In this process, the internal energy of the steam flow is partially converted into sound energy of a certain frequency, and its noise Although the power is greatly weakened, the noise is still higher than the standard value due to various reasons such as exhaust steam deviation from the design value.
The requirements for the design and manufacture of exhaust mufflers are as follows:
1. The material, thickness and manufacturing of the exhaust muffler should adopt advanced and reliable methods to ensure the strength of the muffler.
2. The muffler shell and flow-through components should be flat and smooth, and there should be no welding slag, cutting slag, and drilling debris.
3. The components of the muffler should adopt advanced and reliable processing technology.
4. The surface of the boiler exhaust muffler is degreasing when stainless steel is used. All steel structural parts are derusted.
5. The exhaust muffler is equipped with supports, drains, and lifting eyes. The factory has detailed drawings of installation, operation and maintenance instructions and product quality certificates.
6. The muffler is manufactured in accordance with GB12348-90 "Standard for Noise at the Boundary of Industrial Enterprises" and GB/T4760-1995 "Measurement Method of Acoustic Silencer".
The boiler exhaust muffler is developed based on the principle of anti-, spray, and anti-composite noise elimination. It has large noise reduction, adaptive frequency bandwidth, targeted design (low and medium pressure, high pressure, ultra high pressure, subcritical, supercritical) and easy installation advantage. Exhaust muffler (silencer) is mainly used for the effective muffling of equipment such as electric power, petrochemical, metallurgy, mining, and textile industry boiler steam discharge.