Multifunctional composite pipe silencer

Abstract

The invention discloses a multifunctional composite pipe silencer which comprises an exhaust barrel body, an expansion pressure-reduction device, a temperature-reducing energy-absorbing device, a frequency modulation and sound absorption device, a low-frequency sound elimination device, a high-frequency sound elimination device and a sound baffle device. The expansion pressure-reduction device, the temperature-reducing energy-absorbing device, the frequency modulation and sound absorption device, the low-frequency sound elimination device, the high-frequency sound elimination device and the sound baffle device are located in the cavity of the exhaust barrel body. A plurality of air through holes are formed in the peripheral face of the expansion pressure-reduction device. The temperature-reducing energy-absorbing device comprises a cooling liquid circulating chamber with a ventilation cavity and a cooling liquid coil arranged in the ventilation cavity, wherein the cooling liquid coil is filled with cooling liquid. The frequency modulation and sound absorption device comprises a plurality of air guide barrels, wherein air guide holes are distributed in the peripheral faces of the air guide barrels. The low-frequency sound elimination device comprises a plurality of single low-frequency sound elimination bodies. The high-frequency sound elimination device comprises a plurality of single high-frequency sound elimination bodies located among the adjacent single low-frequency sound elimination bodies, wherein the cross sections of the single high-frequency sound elimination bodies are V-shaped. The sound baffle device comprises a plurality of single sound baffle bodies located between two adjacent single high-frequency sound elimination bodies, wherein sound absorption layers are arranged in the sound baffle bodies. The multifunctional composite pipe silencer can reduce hot air flows and noise pollution of a fan or a chimney pipeline during exhausting.

Description

technical field [0001] The invention relates to environmental protection equipment used for fans or chimney pipes, in particular to a multifunctional composite pipe silencer. Background technique [0002] Fan exhaust and chimney ducts are in accordance with industrial environmental protection requirements. The exhaust ducts and chimneys need to be 3m higher than the surrounding buildings or structures. The noise far exceeds the requirements stipulated in the "Environmental Noise Emission Standards at the Boundary of Industrial Enterprises" promulgated by the state, and when the flue gas is discharged, it is accompanied by heat loss, resulting in hot air flow, which significantly increases the noise and further causes damage to the surrounding environment. sound polution. Contents of the invention [0003] The technical problem to be solved in the present invention is to propose a multifunctional composite pipe muffler for the deficiencies of the prior art, which can redu...

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Problems solved by technology

[0002] Fan exhaust and chimney ducts are in accordance with industrial environmental protection requirements. The exhaust ducts and chimneys need to be 3m higher than the surrounding buildings or structures. The noise far exceeds the requirements stipulated in the "Environmental Noise Emission Standards at the Boundary of Industrial Enterprises" promulgated by the state, and when the flue gas is discharged, it is accompanied by heat loss, resulting in hot air flow, which significantly increases the noise and further causes damage to the surrounding environment. sound polution

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