Exhaust muffler

Product Details

I. Definition

Pipe silencers (mufflers) are primarily used for effectively silencing steam emissions from thermal equipment such as boilers and steam turbines in the power generation sector.。

II. Usage

Steam BoilerSteam related to thermal equipmentEmissionThe emitted noise can reach up to 130 decibels, far exceeding the noise regulations issued by our country.Industrial Noise Hygiene StandardsSpecified values (e.g., superheated steam at 1 kg/cm² pressure, when discharged into the atmosphere through an opening, can reach a speed of 570-600 meters per second. For saturated steam, the speed can also reach 470-480 meters per second. Such high-speed steam, when discharged into the atmosphere, exceeds the speed of sound (340 meters per second), resulting in significant noise). The noise reduction effect meets the requirements of the "Industrial Enterprise Noise Hygiene Standard."

Section 3:Features

Pipe silencers (mufflers) are primarily used for effectively silencing steam emissions from thermal equipment such as boilers and steam turbines in power generation departments. They are also widely employed in the boiler steam emissions and other gas exhaust silencing in industries such as oil, chemicals, metallurgy, and textiles..A muffler is a device that blocks sound transmission while allowing airflow to pass through.Excl.Significant measures for reducing steam exhaust dynamic noiseTo assess the quality of an exhaust muffler, consider the following three main aspects:

The sound absorption of the pipe silencer meets the requirements of the "Noise Hygiene Standard for Industrial Enterprises."

2. The adaptability of pipe silencers (i.e., suitable for low-mid frequency spectrum, wide bandwidth, and high temperature/pressure conditions).

3. Structural performance of pipe silencers (including reasonable dimensions, low cost, long lifespan, etc.).

Boiler steam in the power generation department is not only high temperature and high pressure but also has a wide emission frequency range. Relying solely on small-hole soundproofing is insufficient. The Zuli Exhaust Steam Soundproofing Device is developed based on the composite noise reduction principle of resistance, injection, and obstruction, featuring large noise reduction capacity, wide frequency adaptation, and targeted design (for various boiler and pressure vessel pipeline exhaust emissions, including parameters such as low pressure, medium pressure, sub-high pressure, high pressure, ultra-high pressure, sub-critical, and super-critical). The noise reduction tube is made of stainless steel (1Cr18Ni9Ti, 12Cr1MoV) and is easy to manufacture and install.

FourPrinciple

Boiler exhaust silencers are manufactured based on the principle of micro-perforated plate noise reduction. Steam emissions from power plant boilers generally have high flow velocities, and high velocities can affect the noise reduction of small apertures.Please provide the Chinese content to be translated.So, we first need to control the flow. After passing through the flow control, the steam enters the expansion chamber, where it is further reduced in pressure and noise. After the steam is reduced in pressure through a large volume, it forms low-pressure steam that is ejected. During this process, the airflow is ejected through small orifices. After ejection, the sound power in each frequency band has been reduced, and the frequency of the sound pressure level has been elevated toAbove 20000Hz, noise is greatly reduced. However, secondary noise at certain frequencies still requires further attenuation. We have added a resistive acoustic cotton structure to the exterior, which is designed based on the frequency spectrum characteristics of the remaining noise emitted by the pressure-reducing body, to effectively absorb the residual noise. After installation in accordance with specifications, the total noise reduction should reach 30-60 decibels, meeting the requirements.

FiveSelection

The mufflers are meticulously designed according to the user's emissions target and requirements. Consequently, only products that match the emissions target and parameters are eligible.LargeExcellent sound-dampening effect.

Therefore, when ordering mufflers, the following information must be provided:

(1) Steam emission capacity (T/h), as well as pressure and temperature.

（2) Applicable Use (e.g., for boiler steam output or)SafetyValve exhausts, etc.

(3) Exhaust pipe outer diameter, wall thickness.