Fan noise suppressor

Product Details

I. Definition

Pipe silencers (noise dampers) are primarily used for effective noise reduction of steam emissions from thermal equipment such as boilers and steam turbines in power generation departments.。

II. Usage

Steam boilerSteam related to thermal equipmentEmissionThe emitted noise can reach up to 130 decibels, far exceeding the standards set forth in our country's "Industrial Enterprise Noise Hygiene StandardsSpecified values (e.g., superheated steam at 1 kg/cm² pressure can reach a speed of 570-600 meters/second when discharged into the atmosphere through an opening, while saturated steam can reach 470-480 meters/second. Such high-speed steam, when discharged at a speed exceeding the sound speed of 340 meters/second, generates a significant amount of noise). The noise reduction effect meets the requirements of the "Industrial Enterprise Noise Hygiene Standard."

ThreeFeatures

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 steam emissions and other gas exhaust silencing in industries such as oil, chemicals, metallurgy, and textiles..A muffler is a device that prevents sound from spreading while allowing airflow to pass through.ExcludingSignificant measures for reducing the dynamic noise of steam exhaustTo assess the quality of an exhaust muffler, the following three aspects are primarily considered:

The noise reduction efficiency of the pipeline muffler meets the requirements of the "Noise Sanitation Standard for Industrial Enterprises."

2. The adaptability of pipe silencers (i.e., suitable for a broad frequency spectrum including low and medium frequencies, as well as high temperatures and pressures).

3. Structural performance of pipe silencers (rational dimensions, low cost, long service life, etc.).

Boiler steam in the power generation department is not only high temperature and high pressure but also has a wide frequency band of emissions. Simply relying on small-hole noise reduction is insufficient. The Assistive Exhaust Noise Attenuator is developed based on the composite noise reduction principle of resistance, spray, and impedance, featuring large noise reduction capacity, wide frequency band adaptation, and targeted design (for various boiler and pressure vessel pipeline exhaust venting, including parameters such as low, medium, sub-high, high, ultra-high, subcritical, and supercritical pressures), with the advantages of being made of stainless steel (1Cr18Ni9Ti, 12Cr1MoV) for easy manufacturing and installation.

Four,Principle

Boiler exhaust mufflers are manufactured based on the micro-perforated plate noise reduction principle. Steam emissions from power plant boilers typically have high flow rates, and high flow rates can affect the noise reduction of small holes.LargeTherefore, we need to control the flow first, then the steam that has been through the initial flow control enters the expansion chamber, where it is further reduced in pressure and noise. After the steam is subjected to a large-volume pressure reduction, it forms low-pressure steam that is ejected. During this process, the airflow is ejected through small-diameter holes. After ejection, the sound power in each frequency band has been reduced, and the frequency of the sound pressure level has been pushed higher toAbove 20,000Hz, the noise is significantly reduced. However, secondary noise at certain frequencies still requires further attenuation. We have added a resistive acoustic cotton structure to the exterior expansion, which is designed based on the spectral characteristics of the residual noise emitted by the pressure-reducing unit to effectively absorb the remaining noise. After installation as required by the user, the total noise reduction should reach 30-60 decibels to meet the specifications.

FiveSelection

The muffler is meticulously designed according to the user's emission targets and requirements. Consequently, only products that match the emission targets and parameters are eligible.LargeExcellent sound-dampening effect.

Therefore, when ordering a muffler, the following information must be provided:

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

（2) Application (e.g., for boiler steam capacity or)SafetyValve exhausts, etc.

(3) Steam exhaust pipe outer diameter, wall thickness.