Introduction to chimney muffler:

Chimney noise disturbing the public, how to - chimney muffler, using chimney muffler - chimney noise management. Chimney noise, such as in chemical plants and cement plants, has high chimneys and high air vents. The noise from the air vents presents a low-frequency buzzing sound, which affects a considerable area of the surrounding environment and brings inconvenience to residents' lives. The chimney muffler applies the principles of acoustics and aerodynamics, and adopts a noise reduction measure of installing impedance composite silencers inside the chimney, while reducing high, -, and low-frequency noise. It also increases the noise reduction effect on low-frequency noise, making the surrounding factory and sensitive areas of the chimney achieve good noise reduction results. At the same time, it improves the aerodynamic structure of the muffler, reduces smoke exhaust resistance loss, and ensures chimney smoke emissions; The muffler structure and installation position can be determined based on the chimney noise spectrum, which can meet the noise reduction requirements while reducing costs.

Scope of application of chimney muffler:

The high-temperature airflow generated by boiler combustion in boiler rooms, heating stations, and pipelines collides with chimneys, causing low-frequency noise and resonance of chimneys. Silencers are installed to change the airflow structure, eliminate noise and resonance, and achieve noise reduction

Chimney noise - treatment method:

It is to install a chimney exhaust muffler at the chimney air outlet. Chimney silencers generally use impedance composite silencers, also known as pipeline silencers. If rainproof is required, rainproof silencers should be used.

The chimney silencer has the following features:

1. Good noise reduction ability for low noise;

2. The power of the muffler should be good, that is, the wind resistance should be small;

3. The duration of the muffler should be long.

Chimney silencer -:

-Specially designed to effectively reduce low-frequency noise through sound reduction; In terms of materials, using weather resistant materials is a good choice for manufacturers who are troubled by chimney noise, especially for high temperature and sulfur-containing flue gas.

Noise reduction - energy: the noise reduction is 15-35dB; The frequency band is 31.5-8000Hz.

Resistance loss: The resistance corresponding to the noise reduction is 15-120Pa.

Usage: Suitable for chimney discharge conditions, with temperatures ranging from - to 450 ℃, corrosive, and gas containing certain dust and impurities, with a flow rate of 2-15m/s.

Noise Reduction - Result:

Ensure that the chimney can meet the relevant standards of the Industrial Enterprise Boundary Noise Emission Standard (GB12348-2008) after treatment.

Principle of chimney muffler:

The chimney muffler adopts the principle of through-hole spraying and blocking for noise reduction. It replaces the microporous perforated plate type with a large hole expansion and flow control. On the structure, the principle of ensuring smooth exhaust of the safety door is adopted, and the layered perforated sound absorption is combined with the blocking and silencing principle to allow steam sound waves to enter several small holes in the porous sound-absorbing material. The molecular vibration of the porous material is generated, and the sound energy is converted into heat energy to overcome frictional resistance and viscous force, achieving the desired sound reduction effect, -Ensure the smooth discharge of steam.

Pipeline silencer

Pipeline silencers are mainly used for silencing the steam emissions of thermal equipment such as boilers and steam turbines in the power generation department. The noise reduction capacity of the pipeline muffler can meet the requirements of the Industrial Enterprise Noise Hygiene Standard.

Blower silencer

The blower muffler is mainly suitable for reducing the intake and exhaust noise of Roots series and axial flow series fans. The blower muffler can also be used for noise reduction of exhaust pipes and other high-pressure fans, with a noise reduction amount of 10-20dB (A) and a pressure loss of less than 500Pa.

Centrifugal fan silencer

The centrifugal fan muffler is developed based on the principle of soundproof sheet noise reduction. This type of muffler has good acoustic performance and good aerodynamic performance; Reasonable in structure and easy to install, it is a honeycomb type muffler with high wind resistance. It adopts a chamber resistant adhesive straight pipe channel and a cross shaped sound-absorbing plate form.

Blow pipe silencer

Blow pipe silencers can be used to eliminate the noise generated by boilers and pipelines during blowing. Box type blow pipe silencers are divided into upper exhaust and partial exhaust, with the upper exhaust type being a box structure and the partial exhaust type being a circular structure.

Steam silencer

Steam silencers are used for a wide range of steam emission objects in thermal equipment. Various specifications of boiler steam silencers can be designed and manufactured based on the user's extracted steam output, steam pressure, and connection size.

Fan silencer

Safety valve silencer

The TA type exhaust safety valve silencer is suitable for the safety valves of pressure devices such as PCV/ERV safety valves (power release valves), drum safety valves, superheater safety valves, and reheater safety valves in power plant boilers. The safety valve muffler adopts the principle of spray impedance composite noise reduction, which replaces the smaller diameter control hole with a large hole expansion.

Small hole injection silencer

A small hole injection muffler is also known as a diffuser. It sprays gas from high-pressure vessels through several layers of small orifice plates to reduce noise. To prevent clogging of small holes and the difficulty of processing small holes, the diameter of small holes can be selected within the range of 1-3 millimeters (which should meet the condition of b>=8d)

Venting silencer

A venting muffler is designed and developed to suppress noise production during factory pipeline venting and exhaust. The types of mufflers are divided into six main types: vent mufflers, impedance composite mufflers, micro perforated plate mufflers, small hole mufflers, and existing mufflers.

Combination fan silencer

The combination type fan muffler (combination type composite muffler) mainly has a small hole type muffler inserted inside the fan muffler to achieve the desired effect, and the combination mode can be selected as needed. Welcome - Customers come to design and manufacture, or contact us to help you design.