CN203963901U - Sound absorber for waste heat boiler noise reduction - Google Patents
Sound absorber for waste heat boiler noise reduction Download PDFInfo
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- CN203963901U CN203963901U CN201420242605.7U CN201420242605U CN203963901U CN 203963901 U CN203963901 U CN 203963901U CN 201420242605 U CN201420242605 U CN 201420242605U CN 203963901 U CN203963901 U CN 203963901U
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- waste heat
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- noise reduction
- heat boiler
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Abstract
The utility model provides a kind of sound absorber for waste heat boiler noise reduction, comprising: flat part (1), for being connected with boiler body; Tapered portion (2), its big opening end is connected with described flat part (1), and osculum end is for being connected with boiler chimney (3), and the sound wave that the inwall of the inwall of described tapered portion (2) and described flat part (1) can produce reflection flow of flue gas forms reflection; Noise elimination structure, be arranged in the common cavity forming of flat part and tapered portion, the sound wave producing to absorb flow of flue gas, this device can absorption boiler inside noise, reduce noise in the propagation of boiler internal, thereby the operatic tunes in elimination boiler resonates, reduced dramatically production and the maintenance cost of equipment.
Description
Technical field
The utility model relates to a kind of sound absorber for waste heat boiler noise reduction, belongs to boiler noise abatement apparatus technical field.
Background technology
In thermal power generation field, waste heat boiler can utilize high-temperature flue gas waste heat as thermal source, produce steam for generating, thereby make the waste heat energy of high-temperature flue gas access effective utilization and can improve generating efficiency, so waste heat boiler is widely used at power field.
When the waste heat of high-temperature flue gas being carried out to effectively utilization, also there are some defects in waste heat boiler, for example, produces a large amount of noises, has a strong impact on working environment and periphery resident's life.In order to reduce this adverse effect, prior art is passed through to waste heat boiler arranged outside noise-proof wall, so that noise is closed, although this mode can reach the object of noise reduction effectively, but also make the cost of equipment higher, and, due to the buffer action of protecting wall, the much noise that boiler internal gathers can make the inner operatic tunes that forms of waste heat boiler resonate and cause device damage, and then has increased the maintenance cost of equipment.
For the problems referred to above, the applicant provides the waste heat boiler that silencing apparatus is set in a kind of conical region being connected with boiler chimney at boiler, the acoustic board of this silencing apparatus is vertically positioned in this conical region side by side, yet in practice, the applicant finds, because flue gas rises, wherein subsidiary flue dust is easy to gather on conical region inwall, and the angle that the tilt internal wall of conical region and vertical acoustic board form is unfavorable for flowing of flue gas, make has a large amount of flue dust impurity to adhere between silencing apparatus and inwall more, thereby easily cause the perforation of silencing apparatus to block, reduced to a certain extent soundproof effect.
Therefore for waste heat boiler, providing a kind of can either effectively absorb noise, and the sound absorber again smoothness of flow of flue gas not being impacted is substantially necessary.
utility model content
Technical problem to be solved in the utility model is that the silencing apparatus of existing low noise waste heat boiler easily impacts the smoothness of flow of flue gas, and perforation easily occurs blocks, the technical problem that soundproof effect is not good, thereby provide a kind of, flue gas circulation is not exerted an influence substantially, and can carry out multiple reflections and the sound absorber of absorption boiler internal noise effectively to sound wave.
For solving the problems of the technologies described above, the utility model provides a kind of sound absorber for waste heat boiler noise reduction, and it comprises:
Flat part, for being connected with boiler body;
Tapered portion, its big opening end is connected with described flat part, and osculum end is for being connected with boiler chimney, and the sound wave that the inwall of described tapered portion and the inwall of described flat part can produce flow of flue gas forms reflection;
Noise elimination structure, is arranged in the common cavity forming of flat part and tapered portion the sound wave producing to absorb flow of flue gas.
Described noise elimination structure comprises that a plurality of spaces are arranged on the double-sided perforated acoustic board in described cavity, and several are arranged on the one side sound absorption structure on described tapered portion inwall and/or described flat part inwall.
Described one side sound absorption structure comprise the side that is formed with the perforated plate of several perforates and is arranged on perforated plate with and perforated plate between form the liner plate of sound absorption cavity.
Described double-sided perforated acoustic board comprise liner plate and be connected to two sides of liner plate with and liner plate between form sound absorption cavity perforated plate, on perforated plate, be formed with several perforates.
The tapping of perforated plate is provided with the internal lining pipe extending towards liner plate.
Described in several, double-sided perforated acoustic board be arranged in parallel side by side, and the dual-side of described double-sided perforated acoustic board is removably connected with the inwall of described flat part respectively.
On the relative inwall of described flat part, be respectively arranged with inserting groove, the side of described double-sided perforated acoustic board can be pegged graft and is engaged in described inserting groove.
Described in several, double-sided perforated acoustic board connects successively, the structure that is " returning " font of arranging to form inside and outside multilayer in described cavity.
Described double-sided perforated acoustic board and or described one side sound absorption structure on be formed with a plurality of sound absorption districts that can absorb different frequency of sound wave; Or,
Described double-sided perforated acoustic board and or described one side sound absorption structure are formed by a plurality of sound absorption plate stacks that can absorb different frequency of sound wave.
The thickness of perforated plate is 0.5～5mm, and on perforated plate, the aperture of perforate is 2～10mm, and punching rate is 0.1%～1%., longitudinal degree of depth of sound absorption cavity is 150～300mm, the length of internal lining pipe is 5～10mm.
Spacing between adjacent two described double-sided perforated acoustic boards (6) is 0.5～2m, and the height of described double-sided perforated acoustic board (6) is 1～5m.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) sound absorber for waste heat boiler noise reduction of the present utility model, comprises flat part, for being connected with boiler body, tapered portion, its big opening end is connected with described flat part, and osculum end is for being connected with boiler chimney, and the sound wave that the inwall of described tapered portion and the inwall of described flat part can produce flow of flue gas forms reflection, noise elimination structure, is arranged in the common cavity forming of flat part and tapered portion the sound wave producing to absorb flow of flue gas, by flat part and tapered portion being set between described boiler body and described boiler chimney, make to become angle setting between the inwall of flat part and the inwall of tapered portion, with the sound wave that flow of flue gas is produced, form multipath reflection, more be conducive to described noise elimination structure for the absorption of sound wave, reduce significantly the noise that flow of flue gas produces, thereby strengthened noise reduction, reducing furnace chamber noise outwards propagates by chimney, and the flue gas that is arranged so that of described flat part has obtained the cushion space of in rising, be conducive to the circulation of flue gas, can effectively prevent that soot build-up from causing the obstruction of noise elimination structure in tapered portion inwall, guarantee the soundproof effect of waste heat boiler, structure is more reliable.
(2) sound absorber for waste heat boiler noise reduction of the present utility model, described noise elimination structure comprises that a plurality of spaces are arranged on the double-sided perforated acoustic board in described cavity, and several are arranged on the one side sound absorption structure on described tapered portion inwall and/or described flat part inwall, described double-sided perforated acoustic board is arranged in described cavity, preferably be arranged in described flat part, can be so that described double-sided perforated acoustic board and described tapered portion inwall maintain an intersegmental distance, the phenomenon that prevents flue gas impurity to be attached to bullet inwall and block flue, be conducive to the circulation of flue gas.
(3) sound absorber for waste heat boiler noise reduction of the present utility model, a plurality of described double-sided perforated acoustic boards be arranged in parallel side by side, be convenient to sound wave reflection and absorption, noise reduction is good, and the dual-side of described double-sided perforated acoustic board is removably connected with the inwall of flat part respectively, on the relative inwall of described flat part, be respectively arranged with inserting groove, the side of double-sided perforated acoustic board can be pegged graft and is engaged in inserting groove, make the equipment installation of low noise waste heat boiler of the present utility model more simple, be convenient to maintenance and the replacing of silencing apparatus.
(4) sound absorber for waste heat boiler noise reduction of the present utility model, also can adopt a plurality of described double-sided perforated acoustic boards to connect successively, to form the set-up mode of the structure that is " returning " font of inside and outside multilayer layout, described double-sided perforated acoustic board is set up in parallel with burner hearth wall is parallel, be conducive to form multiple reflections, be convenient to noise elimination structure for the absorption of sound wave.
(5) sound absorber for waste heat boiler noise reduction of the present utility model, described one side sound absorption structure comprise the side that is formed with the perforated plate of several perforates and is arranged on perforated plate with and perforated plate between form the liner plate of sound absorption cavity; Described double-sided perforated acoustic board comprise liner plate and be connected to two sides of liner plate with and liner plate between form sound absorption cavity perforated plate, on perforated plate, be formed with several perforates; Simultaneously in order to increase the effective depth of perforate, in the described perforate of described one side sound absorption structure and described double-sided perforated acoustic board, there is the internal lining pipe extending towards described liner plate direction, be chosen in tapping and increase internal lining pipe, be equivalent to increase the thickness of slab of perforated plate, and actual plate face just mainly works to support internal lining pipe, thereby not only guaranteed equivalent plate thickness but also controlled plate body quality.
(6) sound absorber for waste heat boiler noise reduction of the present utility model, is formed with a plurality of sound absorption districts that can absorb different frequency of sound wave on described double-sided perforated acoustic board; Or, described double-sided perforated acoustic board is formed by a plurality of sound absorption plate stacks that can absorb different frequency of sound wave, perforated plate is designed to different structural parameters along channel direction, and then the resonant frequency of the each several part that suitably staggers, thereby make can widen noise elimination frequency band after described double-sided perforated acoustic board overlapped in series, be more conducive to the absorption of noise.
(7) sound absorber for waste heat boiler noise reduction of the present utility model, spacing between adjacent two described double-sided perforated acoustic boards is 0.5～2m, the height of described double-sided perforated acoustic board is 1～5m, when making described noise elimination structure obtain better acoustically effective, distance between plates can be not too small and be had influence on flow of flue gas.
Accompanying drawing explanation
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the sound absorber schematic diagram for waste heat boiler noise reduction of the present utility model;
Fig. 2 is the schematic diagram of one side sound absorption structure of the present utility model;
Fig. 3 is the structural representation of double-sided perforated acoustic board of the present utility model;
Fig. 4 is double-sided perforated acoustic board sound absorption of the present utility model district schematic diagram;
Fig. 5 is the schematic diagram of sound absorption plate stack of the present utility model.
Description of reference numerals:
1-flat part, 2-tapered portion, 3-boiler chimney, 5-one side sound absorption structure, 51-liner plate, 52-perforated plate, 52a-perforate, the 53-cavity that absorbs sound, 54-internal lining pipe, 6-double-sided perforated acoustic board, the 64-district that absorbs sound, the 65-plate that absorbs sound.
The specific embodiment
Below in conjunction with accompanying drawing, the sound absorber for waste heat boiler noise reduction of the present utility model is described further.
As shown in Figure 1, the sound absorber for waste heat boiler noise reduction of the present embodiment, comprises flat part 1, tapered portion 2 and noise elimination structure, wherein,
Flat part 1 is for being connected with boiler body (not shown); The big opening end of tapered portion 2 is connected with described flat part 1, and osculum end is for being connected with boiler chimney 3, and the inwall of the inwall of described tapered portion 2 and described flat part 1 is angle setting mutually, and the sound wave that can produce flow of flue gas forms reflection; Noise elimination structure is arranged in described flat part 1 and the common cavity forming of described tapered portion 2, the sound wave producing to absorb flow of flue gas.Like this, by described flat part 1 and tapered portion 2 are set between described boiler body 4 and described boiler chimney 3, make, between described flat part 1 and described tapered portion 2, sound wave is formed to multipath reflection, more be conducive to described noise elimination structure for the absorption of sound wave, reduce significantly the noise that flow of flue gas produces, thereby strengthened noise reduction, reducing furnace chamber noise outwards propagates by chimney, and the flue gas that is arranged so that of described flat part 1 has obtained the cushion space of in rising, be conducive to the circulation of flue gas, can effectively prevent that soot build-up from causing the obstruction of noise elimination structure in tapered portion inwall, guarantee the soundproof effect of waste heat boiler, structure is more reliable.
In the present embodiment, described noise elimination structure comprises that a plurality of spaces are arranged on the double-sided perforated acoustic board 6 in described cavity, and several are arranged on the one side sound absorption structure 5 on described tapered portion 2 inwalls and/or described flat part 1 inwall.
In structure shown in Fig. 1 of the present embodiment, double-sided perforated acoustic board 6 is arranged in flat part 1.And in other structures, double-sided perforated acoustic board 6 also can be arranged in flat part 1, and extend into tapered portion, but it does not contact with the inwall of tapered portion, to form the interval that is suitable for flow of flue gas.
As shown in Figure 2, described one side sound absorption structure 5 comprise the side that is formed with the perforated plate 52 of several perforates 52a and is arranged on perforated plate 52 with and perforated plate 52 between form the liner plate 51 of sound absorption cavity 53.
Further, as shown in Figure 3, described double-sided perforated acoustic board 6 comprise liner plate 51 and be connected to 51 two sides of liner plate with and liner plate between form the perforated plate 52 of sound absorption cavity 53, on perforated plate 52, be formed with several perforates 52a.
Further, as shown in Figures 2 and 3, the described perforate 52a place of described perforated plate 52 is provided with the internal lining pipe 52b extending towards liner plate 51, by increase internal lining pipe 52b at perforate 52a place, can increase the thickness of slab of perforated plate 52, and actual plate face just mainly works to support internal lining pipe, thereby not only guaranteed equivalent plate thickness but also controlled plate body quality, meanwhile, by this internal lining pipe 52b, can further sound wave be incorporated in sound absorption cavity 53, thereby improve sound absorption efficiency.
In the arrangement of double-sided perforated acoustic board 6, described in several, double-sided perforated acoustic board 6 is parallel to the inboard wall of burner hearth setting at boiler minor face place side by side, be that described double-sided perforated acoustic board 6 is identical with furnace width, and the dual-side of described double-sided perforated acoustic board 6 is removably connected with the inwall of described flat part 1 respectively.
Double-sided perforated acoustic board 6 removably connects in structure with a kind of of flat part 1, on the relative inwall of described flat part 1, is respectively arranged with inserting groove, and the side of described double-sided perforated acoustic board 6 can be pegged graft and is engaged in described inserting groove.Like this, grafting by this flute profile formula coordinates, can easily realize quick connection of double-sided perforated acoustic board 6 and flat part 1 inwall, simultaneously, on the inside of flat part 1, be formed with inserting groove and will do not need independent syndeton, so that the designs simplification of this sound absorber, and reduce space hold area.
And in the another kind of arrangement of double-sided perforated acoustic board 6, described in several, double-sided perforated acoustic board 6 also can connect successively, be with burner hearth wall respectively parallel many rows around set-up mode, the structure that is " returning " font of arranging to form inside and outside multilayer in described cavity
But those skilled in the art it will be appreciated that, the arrangement of described double-sided perforated acoustic board 6 of the present utility model in described cavity is not limited to two kinds of structures described above.
Two kinds of structures of described double-sided perforated acoustic board 6 self are described respectively below in conjunction with Figure 4 and 5, but those skilled in the art it will be appreciated that, it is not limited to this structure of described double-sided perforated acoustic board 6, as long as it can be realized according to different frequency of sound wave, selects the function absorbing.
In a kind of version, as shown in Figure 4, on described double-sided perforated acoustic board 6, be directly formed with a plurality of sound absorption districts 64 that can absorb different frequency of sound wave, like this, by form the sound absorption district with different punching rates and aperture on a single whole acoustic board, thereby meet the effective absorption to different frequency of sound wave.In addition, this single acoustic board is also convenient to transportation and assembling.
In another kind of version, as shown in Figure 5, described double-sided perforated acoustic board 6 is formed by a plurality of sound absorption plate 65 stacks that can absorb different frequency of sound wave, what need to indicate is, the structure of described sound absorption plate 65 is identical with the structure of double-sided perforated acoustic board 6 described above, namely, in the short transverse of described double-sided perforated acoustic board 6, a plurality of sound absorption plates 65 superpose to form whole double-sided perforated acoustic board 6 successively.And in the mounting structure of double-sided perforated acoustic board 6, as described above, described double-sided perforated acoustic board 6 is identical with furnace width, and the dual-side of described double-sided perforated acoustic board 6 is removably connected with the inwall of flat part 1 respectively, particularly, on the relative inwall of described flat part 1, be respectively arranged with inserting groove, two sides of a plurality of sound absorption plates 65 can be pegged graft and are engaged in inserting groove, thereby form double-sided perforated acoustic board 6, adopt detachable plate to form described double-sided perforated acoustic board 6, be convenient to maintenance and the replacing of noise elimination structure.
In addition, the thickness of described perforated plate 52 is 0.5～5mm, and on perforated plate 52, the aperture of perforate 52a is 2～10mm, and punching rate is 0.1%～1%., longitudinal degree of depth of sound absorption cavity 53 is 150～300mm, the length of internal lining pipe 52b is 5～10mm.
In the structure being arranged side by side for described double-sided perforated acoustic board 6, specifically as shown in Figure 1, reduce the impact on flow of flue gas when guaranteeing good sound absorption effect as far as possible, spacing between adjacent two described double-sided perforated acoustic boards 6 is set to 0.5～2m, be preferably 1m, and the height of described double-sided perforated acoustic board 6 is 1～5m, be preferably 2m.
When the height of double-sided perforated acoustic board 6 is 2m, a plurality of sound absorption plates 65 are preferably 4, and the height of each sound absorption plate 65 is 0.5 meter.
Like this, by perforated plate is designed to slightly different structural parameters along channel direction, and then the resonant frequency of the each several part that suitably staggers, and the double-sided perforated acoustic board 6 with this structural parameters is arranged by above-described arrangement, can be so that can widen noise elimination frequency band after described double-sided perforated acoustic board overlapped in series, more be conducive to the absorption of noise, the noise that throat is discharged has the sound deadening capacity of 14dB (A) on the octave band of 63Hz, can eliminate the main frequency composition of original displacement noise, factory's circle noise reaches discharge standard substantially, and the drag losses increasing is less than 30 Pa, can not cause remarkable impact to unit.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.
Claims (11)
1. for a sound absorber for waste heat boiler noise reduction, it is characterized in that, it comprises:
Flat part (1), for being connected with boiler body;
Tapered portion (2), its big opening end is connected with described flat part (1), and osculum end is for being connected with boiler chimney, and the sound wave that the inwall of the inwall of described tapered portion (2) and described flat part (1) can produce flow of flue gas forms reflection;
Noise elimination structure, is arranged in the common cavity forming of flat part and tapered portion the sound wave producing to absorb flow of flue gas.
2. the sound absorber for waste heat boiler noise reduction according to claim 1, it is characterized in that: described noise elimination structure comprises that a plurality of spaces are arranged on the double-sided perforated acoustic board (6) in described cavity, and several are arranged on the one side sound absorption structure (5) on described tapered portion (2) inwall and/or described flat part (1) inwall.
3. the sound absorber for waste heat boiler noise reduction according to claim 2, is characterized in that: described one side sound absorption structure (5) comprise the side that is formed with the perforated plate (52) of several perforates (52a) and is arranged on perforated plate (52) with and perforated plate (52) between form the liner plate (51) of sound absorption cavity (53).
4. the sound absorber for waste heat boiler noise reduction according to claim 2, it is characterized in that: described double-sided perforated acoustic board (6) comprise liner plate (51) and be connected to (51) two sides of liner plate with and liner plate between form sound absorption cavity (53) perforated plate (52), on perforated plate (52), be formed with several perforates (52a).
5. according to the sound absorber for waste heat boiler noise reduction described in claim 3 or 4, it is characterized in that: the perforate (52a) of perforated plate (52) locates to be provided with the internal lining pipe (52b) extending towards liner plate (51).
6. the sound absorber for waste heat boiler noise reduction according to claim 4, it is characterized in that: described in several, double-sided perforated acoustic board (6) be arranged in parallel side by side, and the dual-side of described double-sided perforated acoustic board (6) is removably connected with the inwall of described flat part (1) respectively.
7. the sound absorber for waste heat boiler noise reduction according to claim 6, is characterized in that, on the relative inwall of described flat part (1), is respectively arranged with inserting groove, and the side of described double-sided perforated acoustic board (6) can be pegged graft and is engaged in described inserting groove.
8. the sound absorber for waste heat boiler noise reduction according to claim 4, is characterized in that: described in several, double-sided perforated acoustic board (6) connects successively, the structure that is " returning " font of arranging to form inside and outside multilayer in described cavity.
9. according to the sound absorber for waste heat boiler noise reduction described in claim 7 or 8, it is characterized in that: described double-sided perforated acoustic board (6) and or described one side sound absorption structure (5) on be formed with a plurality of sound absorption districts (64) that can absorb different frequency of sound wave; Or described double-sided perforated acoustic board (6) and or described one side sound absorption structure (5) are formed by a plurality of sound absorption plate (65) stacks that can absorb different frequency of sound wave.
10. the sound absorber for waste heat boiler noise reduction according to claim 9, it is characterized in that: the thickness of perforated plate (52) is 0.5～5mm, the aperture of the upper perforate (52a) of perforated plate (52) is 2～10mm, punching rate is 0.1%～1%, longitudinal degree of depth of sound absorption cavity (53) is 150～300mm, and the length of internal lining pipe (52b) is 5～10mm.
11. sound absorbers for waste heat boiler noise reduction according to claim 6, is characterized in that: the spacing between adjacent two described double-sided perforated acoustic boards (6) is 0.5～2m, and the height of described double-sided perforated acoustic board (6) is 1～5m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420242605.7U CN203963901U (en) | 2014-05-13 | 2014-05-13 | Sound absorber for waste heat boiler noise reduction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420242605.7U CN203963901U (en) | 2014-05-13 | 2014-05-13 | Sound absorber for waste heat boiler noise reduction |
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| CN203963901U true CN203963901U (en) | 2014-11-26 |
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| CN201420242605.7U Expired - Fee Related CN203963901U (en) | 2014-05-13 | 2014-05-13 | Sound absorber for waste heat boiler noise reduction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108305608A (en) * | 2017-11-14 | 2018-07-20 | 同济大学 | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
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2014
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108305608A (en) * | 2017-11-14 | 2018-07-20 | 同济大学 | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
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Granted publication date: 20141126 Termination date: 20190513 |