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Composite Chimney Muffler

A muffler and chimney technology, which is applied to machines/engines, combustion product treatment, combustion methods, etc., can solve problems such as difficulty in meeting the noise reduction requirements of high-pressure fan chimneys, and achieve the quality indicators of sound environment, optimize aerodynamic structure, reduce Effect of smoke exhaust resistance loss

Active Publication Date: 2016-06-08
XIAMEN JIADA OF ACOUSTIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the existing chimney mufflers are difficult to meet the noise reduction requirements of high-pressure fan chimneys with large air volume and high noise level

Method used

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  • Composite Chimney Muffler
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  • Composite Chimney Muffler

Examples

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Embodiment Construction

[0020] exist figure 1 , 2 , In the embodiment shown in 3 and 4, a composite chimney muffler includes a load-bearing steel structure, a cylindrical steel structure shell (1), and an impedance composite noise reduction structure. The cylindrical steel structure shell (1) is equipped with an inner sound insulation layer (2) and a sound absorption layer (3), and the air inlet diversion section (4), the oil resistance structure layer (5), The wedge sound-absorbing structure (6), the annular structural plate (7), the expansion anechoic chamber (8), the wind-out noise-absorbing louvers (9); the wedge sound-absorbing structure (6) is a single wedge structure, Composed of a tip (10) and a base (11), the top of the tip (10) is an arc-shaped guide (12), and the wedge sound-absorbing structure (6) is arranged in multiple layers, with multiple wedge sound-absorbing structures on each layer (6) Arranged in parallel and evenly distributed on the vertical plane of the anechoic channel, the ...

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Abstract

The invention discloses a composite chimney silencer which comprises a bearing steel structure, a cylindrical steel structure shell and an impedance composite silencing structure. The composite chimney silencer is characterized in that the cylindrical steel structure shell is provided with an inner sound-insulation layer, a sound-absorption layer, an air inlet guiding section, an oil-blocking structure layer, wedge sound-absorption structures, an annular structure board, an expansion silencing chamber and an air outlet silencing louver, wherein the air inlet guiding section, the oil-blocking structure layer, the wedge sound-absorption structures, the annular structure board, the expansion silencing chamber and the air outlet silencing louver are arranged from bottom to top in sequence; each wedge sound-absorption structure is a single-wedge structure and composed of a sharp portion and a base portion, a circular arc flow guiding body is arranged at the top end of the sharp portion, the wedge sound-absorption structures are arranged at multiple layers, the wedge sound-absorption structures at each layer are arranged in parallel and are distributed on the vertical plane of a silencing channel in a balanced mode, identical channel gaps are reversed between the base portions of the wedge sound-absorption structures, and every two layers of wedge sound-absorption structures are arranged in an intersecting mode. The requirements for the large blast capacity and high-pressure positive blower chimney noise reduction at a high-noise level are satisfied, the insertion loss is equal to or larger than 40dB(A), and a sound environment quality index of residents around a chimney is guaranteed.

Description

technical field [0001] The invention relates to the technical field of noise control, in particular to a composite chimney muffler capable of effectively absorbing and blocking chimney noise transmission. Background technique [0002] The chimney noise is the noise at the discharge port of the high-pressure fan. Due to the high noise level of the high-pressure fan, the noise spectrum is a broadband noise dominated by medium and low frequencies, and the low-frequency noise has strong penetrating power, poor directivity, and strong diffraction ability. Generally, the chimney is very high, and the air outlet is also very high. There is no effective barrier to block, which causes the surrounding environment to be affected in a considerable range and greatly affects the lives of residents. [0003] Chinese patent CN2615515U discloses a "large-scale fuel gas boiler chimney muffler", which is to install a circular muffler in the middle of the chimney, set inner and outer cylinder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66F23J13/00
Inventor 杨锦勇何鹭凤宋继萍蔡伟强林嘉祥
Owner XIAMEN JIADA OF ACOUSTIC TECH CO LTD
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