CN108231052B - Silencer for steel chimney of large boiler induced draft fan - Google Patents

Silencer for steel chimney of large boiler induced draft fan Download PDF

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Publication number
CN108231052B
CN108231052B CN201711406081.5A CN201711406081A CN108231052B CN 108231052 B CN108231052 B CN 108231052B CN 201711406081 A CN201711406081 A CN 201711406081A CN 108231052 B CN108231052 B CN 108231052B
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CN
China
Prior art keywords
sound
induced draft
draft fan
steel chimney
porous plate
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CN201711406081.5A
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Chinese (zh)
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CN108231052A (en
Inventor
朱瑞辉
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Gaozhou Chuangjian Casting Co ltd
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Gaozhou Chuangjian Casting Co ltd
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Priority to CN201711406081.5A priority Critical patent/CN108231052B/en
Publication of CN108231052A publication Critical patent/CN108231052A/en
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chimneys And Flues (AREA)
  • Building Environments (AREA)

Abstract

The invention relates to a silencer for a steel chimney of a large boiler draught fan, which is arranged in the steel chimney of the large boiler draught fan, and comprises a red brick wall, a sound storage chamber and a sound absorption layer, wherein the red brick wall surrounds the sound storage chamber, the sound storage chamber is of a honeycomb structure, the sound storage chamber surrounds the sound absorption layer, the sound absorption layer comprises an outer porous plate, an inner porous plate, sound absorption cotton and a tinfoil sound wave reflection film, the sound absorption cotton is arranged between the outer porous plate and the inner porous plate, the tinfoil sound wave reflection film is arranged between the sound absorption cotton and the inner porous plate, through holes matched with the holes of the inner porous plate are arranged on the tinfoil sound wave reflection film, and the inner porous plate and the sound storage chamber are attached The service life is long, the maintenance cost is avoided, the noise elimination effect is good, and the large-scale boiler steel chimney silencer is very suitable for being used by a large-scale boiler steel chimney.

Description

Silencer for steel chimney of large boiler induced draft fan
Technical Field
The invention relates to a silencer, in particular to a silencer for a steel chimney of a large-scale boiler induced draft fan.
Background
The large-scale boiler induced draft fan chimney has very large air flow, generally 5-20 ten thousand cubic meters per hour, high air flow temperature and strong gas corrosivity.
In order to facilitate the installation of the chimney, most manufacturers adopt a steel chimney to replace an original red brick smoke exhaust pipe, the steel chimney has no silencing effect but has an enhancement and amplification effect on noise, and silencing equipment on the market at present has high manufacturing cost and does not have the characteristic of corrosion resistance.
Disclosure of Invention
The invention aims to disclose a silencer for a steel chimney of a large boiler induced draft fan, which has the advantages of very low construction cost, simple structure, corrosion resistance, long service life, no maintenance cost and good silencing effect, and is very suitable for the steel chimney of the large boiler.
The technical scheme for realizing the silencer for the steel chimney of the large-scale boiler induced draft fan comprises the following steps:
the utility model provides a silencer for large boiler draught fan steel chimney, the silencer is installed in large boiler draught fan steel chimney, the silencer includes the sound-proof wall, stores up the sound room and inhales the sound layer, the red brick wall is surrounding store up the sound room, it is cellular structure to store up the sound room, it is surrounding to store up the sound room inhale the sound layer, it includes outer perforated plate, inlayer perforated plate, inhales the sound cotton and the acoustic reflection membrane to inhale the sound layer, outer perforated plate with be equipped with between the inlayer perforated plate inhale the sound cotton, inhale the sound cotton with be equipped with between the inlayer perforated plate the tinfoil acoustic reflection membrane, be equipped with on the tinfoil acoustic reflection membrane with the through-hole that the hole of inlayer perforated plate matches, the inlayer perforated plate with it laminates to store up the sound room mutually.
Furthermore, the sound insulation wall is a red brick wall, and the red brick wall is low in price and easy to process.
Further, the sound wave reflecting film is a tinfoil sound wave reflecting film.
Furthermore, inhale the sound cotton for glass fiber and inhale the sound cotton, glass fiber inhales the sound cotton and has advantages such as insulating nature is good, the heat resistance is strong, corrosion resistance is good, mechanical strength height, and glass fiber inhales the impact and the corrosivity of the air current of sound cotton fine buffering large-scale boiler draught fan chimney of ability.
Further, the material of outer perforated plate is the stainless steel, the diameter of the mesopore of outer perforated plate is less than or equal to 3 millimeters, the material of inlayer perforated plate is the stainless steel, the diameter of the mesopore of inlayer perforated plate is less than or equal to 2 millimeters, and the stainless steel has anticorrosive characteristic, and the stainless steel is the sound conduction material moreover, can absorb a large amount of noises and enter into the silencer, and the diameter of the mesopore of outer perforated plate is great can noise absorption more easily, and the diameter of the mesopore of inlayer perforated plate is less to subdue the noise in order to let the noise constantly bounce-back in the sound storage room.
The utility model provides an use large boiler draught fan steel chimney of above-mentioned silencer, includes large boiler draught fan steel chimney and silencer, large boiler draught fan steel chimney below is the cavity of cuboid, the cavity is surrounding the silencer, the cavity is equipped with the air intake, large boiler draught fan steel chimney top is for discharging fume the pipe, it is equipped with the air outlet to discharge fume the pipe, the material of large boiler draught fan steel chimney is steel.
The invention has the beneficial effects that: the invention adopts the red brick, the sound absorption cotton and the honeycomb sound storage chamber structure to build the silencer, noise enters the sound storage chamber through the sound absorption cotton, is continuously collided in the sound storage chamber, and then is discharged through the sound absorption cotton, so that the energy of the noise is greatly weakened.
Drawings
FIG. 1 is a schematic diagram of a steel chimney of a large-scale boiler induced draft fan using a silencer of the present application;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a partial view A of FIG. 2;
the names of the components identified in the figures are as follows:
1. a chamber; 11. an air inlet; 2. a smoke exhaust pipe; 21. an air outlet; 3. a sound-insulating wall; 4. a sound storage chamber; 5. a sound absorbing layer; 51. an outer porous plate; 52. an inner porous plate; 53. sound-absorbing cotton; 54. an acoustic wave reflective film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): a silencer used for a steel chimney of a large boiler induced draft fan is arranged in the steel chimney of the large boiler induced draft fan, the muffler comprises a red brick wall 3, a sound storage chamber 4 and a sound absorption layer 5, the chamber 1 surrounds the red brick wall 3, the sound-proof wall 3 surrounds the sound storage chamber 4, the sound storage chamber 4 is of a honeycomb structure, the sound storage chamber 4 surrounds the sound absorption layer 5, the sound absorption layer 5 comprises an outer porous plate 51, an inner porous plate 52, sound absorption cotton 53 and a sound wave reflection film 54, the sound absorption cotton 53 is arranged between the outer porous plate 51 and the inner porous plate 52, the tinfoil acoustic wave reflection film 54 is arranged between the sound absorption cotton 53 and the inner porous plate 52, the tinfoil acoustic wave reflection film 54 is provided with through holes matched with the holes of the inner porous plate 52, and the inner porous plate 52 is attached to the sound storage chamber 4.
The sound insulation wall 3 is a red brick wall which is low in price and easy to process.
The acoustic wave reflective film 54 is a tinfoil acoustic wave reflective film.
Large-scale boiler draught fan steel chimney below is cavity 1 of cuboid, cavity 1 is surrounding the silencer, cavity 1 is equipped with air intake 11, large-scale boiler draught fan steel chimney top is for discharging fume tub 2, it is equipped with air outlet 21 to discharge fume tub 2, the material of large-scale boiler draught fan steel chimney is steel and iron.
Inhale cotton 53 and inhale the sound cotton for glass fiber, glass fiber inhales the sound cotton and has advantages such as insulating nature is good, the heat resistance is strong, corrosion resistance is good, mechanical strength height, and glass fiber inhales impact and the corrosivity of the air current of the cotton fine buffering large-scale boiler draught fan chimney of sound cotton ability.
The material of outer perforated plate 51 is the stainless steel, the diameter of the mesopore of outer perforated plate 51 is less than or equal to 3 millimeters, the material of inlayer perforated plate 52 is the stainless steel, the diameter of the mesopore of inlayer perforated plate 52 is less than or equal to 2 millimeters, and the stainless steel has anticorrosive characteristic, and the stainless steel is the sound conduction material moreover, can absorb a large amount of noises and enter into the silencer, and the diameter of the mesopore of outer perforated plate 51 is great can the noise absorption more easily, and the diameter of the mesopore of inlayer perforated plate 52 is less to be in order to let the noise constantly bounce-back subdue noise energy in sound storage room 4.
The working principle of the embodiment is as follows: air intake 11 department of chimney is sent to wind with large-scale boiler draught fan, because the wind speed is great, constantly the friction produces a large amount of noises, the noise enters into the cavity 1 of chimney, be equipped with the silencer in the cavity 1, the noise enters into through outer perforated plate 51 and inhales in the sound cotton 53, inhale the sound once through inhaling sound cotton 53, then enter into through inner perforated plate 52 and store up in the sound room 4, because store up 4 one end of sound room is red brick wall 3, the other end is the tinfoil sound wave reflectance coating 54 that has the through-hole, so the noise is at the continuous collision of sound room 4 that stores up, the energy of noise reduces, then there are few partial noises to spill over through-hole through tinfoil sound wave reflectance coating 54 and enter into again and inhale sound cotton 53, inhale sound cotton 53 and carry out the secondary and inhale the sound, the energy of noise has been weakened greatly in the whole process, noise reduction discharges.
It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (5)

1. A silencer used for a steel chimney of a large boiler induced draft fan is characterized in that the silencer is arranged in the steel chimney of the large boiler induced draft fan, the silencer comprises a sound insulation wall, a sound storage chamber and a sound absorption layer, wherein the sound insulation wall is a red brick wall, the red brick wall surrounds the sound storage chamber, the sound storage chamber is of a honeycomb structure, the sound absorption layer is surrounded by the sound storage chamber and comprises an outer porous plate, an inner porous plate, sound absorption cotton and a sound wave reflection film, the sound wave reflection film is a tinfoil sound wave reflection film, the sound absorption cotton is arranged between the outer porous plate and the inner porous plate, inhale the sound cotton with be equipped with between the inlayer perforated plate tinfoil sound wave reflectance coating, be equipped with on the tinfoil sound wave reflectance coating with the through-hole of the hole matching of inlayer perforated plate, the inlayer perforated plate with the sound storage room is laminated mutually.
2. The muffler for the steel chimney of the large-scale boiler induced draft fan according to claim 1, wherein the sound-absorbing cotton is glass fiber sound-absorbing cotton.
3. The muffler for the steel chimney of the large-scale boiler induced draft fan according to claim 1, wherein the perforated plate of the outer layer is made of stainless steel, and the diameter of the hole in the perforated plate of the outer layer is less than or equal to 3 mm.
4. The muffler for the steel chimney of the large-scale boiler induced draft fan according to claim 1, wherein the inner porous plate is made of stainless steel, and the diameter of the hole in the inner porous plate is less than or equal to 2 mm.
5. The steel chimney of the large-scale boiler induced draft fan comprises the steel chimney of the large-scale boiler induced draft fan according to claim 1 and a silencer, wherein a cavity of a cuboid is arranged below the steel chimney of the large-scale boiler induced draft fan, the cavity surrounds the silencer, an air inlet is formed in the cavity, a smoke exhaust pipe is arranged above the steel chimney of the large-scale boiler induced draft fan, an air outlet is formed in the smoke exhaust pipe, and the steel is used as the material of the steel chimney of the large-scale boiler induced draft fan.
CN201711406081.5A 2017-12-22 2017-12-22 Silencer for steel chimney of large boiler induced draft fan Active CN108231052B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711406081.5A CN108231052B (en) 2017-12-22 2017-12-22 Silencer for steel chimney of large boiler induced draft fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711406081.5A CN108231052B (en) 2017-12-22 2017-12-22 Silencer for steel chimney of large boiler induced draft fan

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CN108231052A CN108231052A (en) 2018-06-29
CN108231052B true CN108231052B (en) 2021-08-13

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Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3276912D1 (en) * 1981-11-05 1987-09-10 Mitsubishi Electric Corp Exhaust silencer for internal combustion engine
US5965851A (en) * 1997-01-28 1999-10-12 Owens Corning Fiberglas Technology, Inc. Acoustically insulated apparatus
JP2001350477A (en) * 2000-06-07 2001-12-21 Kyokuto Corp Precast sound absorbing board having sound insulation effect
JP2009062977A (en) * 2007-08-15 2009-03-26 Rohr Inc Linear acoustic liner
CN202917165U (en) * 2012-12-03 2013-05-01 哈尔滨工业大学 A micro perforated plate cell composite noise-reducing structure
WO2014201558A1 (en) * 2013-06-17 2014-12-24 Gestion Soprema Canada Inc. Sound-insulating material and method of manufacturing same
CN203546931U (en) * 2013-09-05 2014-04-16 马鞍山创宁新材料科技有限公司 Composite sound-absorbing board capable of decoupling, eliminating vibration and insulating sound
CN205178284U (en) * 2015-11-09 2016-04-20 国网吉林省电力有限公司电力科学研究院 Structure of making an uproar is fallen based on foamed aluminium metal reduces city transformer substation low -frequency noise
CN205185430U (en) * 2015-11-20 2016-04-27 力尔铝业股份有限公司 Green energy -conserving for vehicle aluminium lamina membranacea
CN206711599U (en) * 2017-03-29 2017-12-05 南京理工大学 A kind of cycle born of the same parents structure composite sound panel

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Denomination of invention: A muffler for steel chimney of induced draft fan of large boiler

Effective date of registration: 20211229

Granted publication date: 20210813

Pledgee: China Construction Bank Corporation Gaozhou sub branch

Pledgor: GAOZHOU CHUANGJIAN CASTING CO.,LTD.

Registration number: Y2021980017020

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