Composite sound reduction system for PM2.5 emission reduction device based on intense sound agglomeration

Abstract

The invention discloses a composite sound reduction system for a PM2.5 emission reduction device based on intense sound agglomeration, and the system comprises a sleeve, a separation plate, a sound absorbing material, a micropunch sound absorbing plate, and a piston, wherein an air gap after the sound absorbing material and the micropunch sound absorbing plate is controlled by the piston. The system employs the fundamentals of sound reduction and isolation. When a sound wave with the sound pressure level 140-160 dB passes through an agglomeration cabin, the isolation of the sound wave is carried through the separation plate, and then a part of sound intensity is reduced through a sound reduction material, and finally the sound absorption is carried out again through the micropunch sound absorbing plate, thereby enabling the sound pressure level of the emission reduction device to be greatly reduced. The system avoids the damages from especially intense noise to the instrument equipment and buildings, and guarantees the personal safety of workers on the first line. Moreover, the whole implementation scheme is advantageous in sound reduction efficiency, economical performance, adaptability and extendibility.

Description

technical field [0001] The invention relates to the technical field of environmental noise control, in particular to a compound noise reduction system based on a strong sound condensation PM2.5 emission reduction device. Background technique [0002] The rapid development of my country's economy consumes more and more energy, and the pollutants discharged into the atmosphere from the combustion energy system are increasing day by day. In recent years, according to the environmental monitoring data of major and medium-sized cities, PM2.5 serious exceeding the standard has occurred from time to time, and urban smog has repeatedly appeared in a large area. The traceability research of smog and haze by the Chinese Academy of Sciences and the International Cooperation Committee on Environment and Development shows that fine particulate matter mainly PM2.5 has become the main pollutant of my country's urban atmospheric environment. Academic studies have generally confirmed that s...

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Problems solved by technology

[0006] In order to solve the problem that the traditional muffler has a weak muffler ability and is not suitable for the strong sound with a sound pressure level as high as 160dB, the present invention adopts a compound muffler system of sound insulation and muffler materials and a micro-perforated muffler plate to make the strong sound condense The PM2.5 emission reduction device reduces noise by about 80dB

At the same time, because the micro-perforated plate can have a good sound absorption effect on the middle and high frequency noise, and the mechanical impedance unit such as the sound insulation board can produce good sound absorption on the low frequency, the whole structure can not only ensure good sound absorption performance on the middle and high frequency, but also can It has a good sound absorption effect at low frequencies, which solves the problem of 300-3000Hz wide-band strong sound noise reduction used in PM2.5 emission reduction devices.

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