How to calculate the length of fan muffler

Carefully designed according to users' emission targets and requirements. Therefore, only products that meet the emission targets and parameters can achieve the maximum noise elimination effect. Therefore, when ordering silencers, the following information must be provided:

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

(2) users (such as boiler steam discharge or safety valve discharge);

(3) The outside diameter and wall thickness of the exhaust pipe.

Extended data:

Fan muffler is divided into centrifugal fan muffler, Roots fan muffler, blower muffler and axial fan muffler. Fan muffler is mainly used to reduce the aerodynamic noise of various fan tuyeres, air ducts and air inlets in closed machine rooms.

According to the different inlet and outlet structures of the fan, it can be divided into circular structure and rectangular structure.

(1) The nozzle of the fan adopts a circular structure, which is divided into two types: A and B. Both ends of Type A are flanges, which are directly connected in series in the pipeline (i.e. pipe muffler), and one end of Type B is flange, and the other end is directly pumped to the atmosphere (rain cover can be installed), which is only available at the end of outdoor pipeline and the air inlet of closed machine room.

(2) In the circular structure, the general thickness of the resistive anechoic sheet is 100 mm, 150 mm, and the anechoic volume is 15-30dB(A). When the wind speed is 5- 12m/s, the suitable air volume is 1000-50000 m3/. In its structure, impedance is used to eliminate high-frequency noise and low-frequency noise, thus widening the noise elimination frequency band to the maximum extent.

Baidu encyclopedia-fan muffler