Description: Noise attenuation hardware fitted on inlet outlet piping of Roots / centrifugal blowers within cornstarch pneumatic conveying lines, important auxiliary pipeline sparepart. Roots blower operation generates intensive aerodynamic noise (90–110 dB(A)). Combined resistive reactive muffler principle reduces blower intake exhaust noise level by 20–30 dB(A), keeping workshop noise within occupational health and environmental protection emission limits.
Housing: Cylindrical metal shell; 304 stainless steel or powder coated carbon steel, topbottom flange connections.
Noise attenuation cartridge: Core functional element with combined resistive reactive architecture.
Resistive section: Perforated stainless steel plate wrapped with fiber shed resistant sound absorbing wool (glass wool / rock wool) for mid high frequency noise reduction.
Reactive section: Multi stage expansion / resonance cavities eliminating low frequency pulsation noise.
Flow guide assembly: Internal baffles homogenise airflow distribution and suppress regenerated flow induced noise.
Auxiliary components: Drain valve for condensate drainage; pressure tap for resistance monitoring; inspection cover for cartridge exchange; inlet outlet protective screen blocking foreign object ingress.
Combined principle muffler targeting multi frequency band blower noise:
1. Resistive noise attenuation (mid high frequency): Airflow passes perforated plates; sound waves penetrate porous absorbing media, acoustic energy converts into thermal energy for abatement of high speed airflow originated mid high frequency noise.
2. Reactive noise attenuation (low frequency pulsation): Sudden pipe cross section transitions (expansion / resonance cavities) induce reflection interference for low frequency sound waves, counteracting characteristic low frequency pulse noise of Roots blowers.
3. Straight through composite layout: Airflow passes central passage surrounded by absorbing media; low pressure drop and broad noise reduction bandwidth.
High noise reduction capacity: Overall attenuation of 20–30 dB(A), improving workshop acoustic environment.
Low pressure drop: Optimised flow path; pressure loss limited to several hundred Pascals without degrading blower conveying performance.
Food grade compatible build: Stainless steel housing plus fiber shed resistant sound absorbing wool, avoiding fibre contamination risk for starch product.
High temperature & scouring resistance: Reinforced perforated plate internals; absorbing media anti settling and anti vibration fracture design.
Compact vertical mount layout, direct flange connection onto blower nozzles.
Service friendly: Noise attenuation cartridge can be extracted for replacement; full housing replacement unnecessary.
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