Ventilation muffler

Product Details

I. Definition

Pipe muffler (muffler) products are mainly used for effective noise reduction of steam emissions from thermal equipment such as boilers and steam turbines in the power generation department.。

II. Usage

Steam boilerSteam related to thermal equipmentEmissionThe noise emitted can reach up to 130 decibels, far exceeding the noise standards set forth by our country's regulations.Industrial noise hygiene standardsRegulated values (for instance, superheated steam at a pressure of 1 kg/cm², when expelled into the atmosphere through an orifice, can reach speeds of 570-600 meters/second. In contrast, saturated steam can achieve speeds of 470-480 meters/second. At such high speeds, when expelled into the atmosphere, the steam exceeds the speed of sound at 340 meters/second, resulting in significant noise levels). The noise reduction meets the requirements of the "Industrial Enterprises Noise Hygiene Standard."

Three.Features

Pipe mufflers (silencers) are primarily used for effectively silencing steam emissions from thermal equipment such as boilers and steam turbines in power generation departments. They are also extensively 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 air flow through.ExcludingSignificant measures for reducing steam exhaust dynamic noiseTo evaluate the quality of an exhaust silencer, consider the following three main aspects:

The sound absorption of the pipeline muffler meets the requirements of the "Noise Hygiene Standard for Industrial Enterprises."

2. The adaptability of pipe silencers (i.e., suitable for low to medium frequency bandwidth and high temperature and pressure conditions).

3. Structural properties of pipe silencers (such as reasonable dimensions, low cost, and long lifespan).

Boiler steam in the power generation department is not only high temperature and high pressure but also has a wide frequency bandwidth. Simply relying on small hole sound attenuation is insufficient. The Zuli Exhaust Sound Attenuator is developed based on the composite noise attenuation principle of resistance, jet, and block. It features large noise attenuation, a wide frequency bandwidth, and targeted design for various parameters (including low, medium, sub-high, high, ultra-high, subcritical, and supercritical pressure) of different boilers and pressure vessel pipeline exhausts. The noise attenuation tube is made of stainless steel (1Cr18Ni9Ti, 12Cr1MoV) and is easy to install.

FourPrinciple

Boiler exhaust mufflers are manufactured based on the micro-perforated plate noise reduction principle. The steam exhaust from power plant boilers typically has high flow rates, and high flow rates can affect the noise reduction of small holes.Please provide the Chinese content to be translated.Therefore, we need to control the flow first, then the steam that has been through one stage of flow control 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 is reduced, and the frequency of the sound pressure level is 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棉 structure to the exterior expansion, 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 the user installs it according to specifications, the total noise reduction should reach 30-60 decibels to meet the requirements.

Five,Selection

The mufflers are meticulously designed according to the customers' 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 volume (T/h), as well as pressure and temperature.

（2) Application Object (e.g., for boiler steam output or)SafetyValve discharges, etc.

(3) Exhaust pipe outer diameter, wall thickness.