CN203703931U - Single-faced perforated sound absorber used for interior of heat recovery boiler - Google Patents
Single-faced perforated sound absorber used for interior of heat recovery boiler Download PDFInfo
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- CN203703931U CN203703931U CN201320855939.7U CN201320855939U CN203703931U CN 203703931 U CN203703931 U CN 203703931U CN 201320855939 U CN201320855939 U CN 201320855939U CN 203703931 U CN203703931 U CN 203703931U
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Abstract
The utility model discloses a single-faced perforated sound absorber used for the interior of a heat recovery boiler. The single-faced perforated sound absorber comprises a perforated plate 1 and a lining plate 2, wherein the perforated plate 1 is arranged at one side of the lining plate 2, a groove structure is formed in one side, which is attached to the perforated plate 1, of the lining plate 2, and a sound absorbing cavity 3 is formed between the perforated plate 1 and the lining plate 2. Compared with the traditional technology, the single-faced perforated sound absorber used for the interior of the heat recovery boiler has the advantages that a certain number of small holes are formed in the perforated plate and a certain number of lining pipes are arranged in the perforated plate, so that the problem that the traditional porous sound absorption material is easily blocked is effectively avoided; the sound absorbing cavity which is formed by the perforated plate and the lining plate jointly forms a resonance absorber, noise which is produced by the interior of the heat recovery boiler is effectively absorbed, and a part of noise is reflected back to a noise source. Therefore, the single-faced perforated sound absorber used for the interior of the heat recovery boiler is mounted at a reasonable position of the heat recovery boiler, and the aims of absorbing the internal noise of the boiler, reducing the propagation of the noise inside the boiler and eliminating vocal cavity resonance inside the boiler are reached.
Description
Technical field
The utility model relates to a kind of perforation of the one side for waste heat boiler inside sound absorber, belongs to the Noise Prevention and Treatment field of waste heat boiler.
Background technology
At present, because waste heat boiler can obtain the waste heat producing after generating secondary utilization and can improve generating efficiency, therefore waste heat boiler is widely used at power field.In actual application process, waste heat boiler is inner can produce a large amount of noises, has a strong impact on periphery resident living, therefore, in the time that waste heat boiler uses, must carry out noise reduction process to it.In practical operation, owing to can not find the reason that produces noise, so be mainly by give waste heat boiler arranged outside noise-proof wall, noise is closed, adopt the object that can effectively reach in this way noise reduction, but this way not only cost of equipment is higher, and be unfavorable for the heat radiation of boiler furnace, this is very large to the performance impact of boiler itself; The daily maintenance of boiler and maintenance are made troubles simultaneously, and then increased maintenance and the cost of overhaul of equipment.Find after deliberation, low-frequency noise is one of Main Noise Sources of waste heat boiler, therefore researches and develops a kind of device that contributes to the low-frequency noise that reduces boiler body inside and is necessary very much.
Utility model content
The purpose of this utility model is to provide a kind of one side for waste heat boiler inside perforation sound absorber, and the low-frequency noise that it can absorption boiler inside, contributes to reduce the propagation of noise at boiler internal, eliminates the operatic tunes resonance in boiler.In addition, this utility model can substitute traditional noise-reduction method, has reduced dramatically production and the maintenance cost of equipment.
The technical solution of the utility model: a kind of perforation of the one side for waste heat boiler inside sound absorber, comprise perforated plate and liner plate, perforated plate is located at liner plate one side, and the side that liner plate is close to perforated plate is trench structure, makes formation sound absorption cavity between perforated plate and liner plate.Its theoretical foundation is Helmholtz resonator principle, and the similar piston of air column in perforation plate hole, has certain acoustic mass, and sound absorption cavity type is similar to air spring, has certain elasticity, and the two forms a resonator system.In the time that sound wave reaches aperture, under sound wave effect, make air column produce vibration, frictional damping when vibration makes a part of acoustic energy be converted to thermal energy consumption to dissipate, and due to the unexpected variation of acoustic impedance, a part of acoustic energy will be reflected back sound source simultaneously.Finally reach the noise of absorption boiler inside, the object of the operatic tunes resonance of minimizing noise in propagation, the elimination boiler of boiler internal.
The aforesaid perforation of the one side for waste heat boiler inside sound absorber, the thickness of perforated plate is 0.5～5mm; Piercing aperture on perforated plate is 2～10mm; Punching rate on perforated plate is 0.1%～1%.Less punching rate can guarantee that sound absorption structure absorbs low-frequency noise, avoids traditional sound-absorbing porous material to hold susceptible to plugging problem by the hole that diameter is less is set on perforated plate simultaneously.In addition, perforated plate also plays the effect of secure liner pipe.
The aforesaid perforation of the one side for waste heat boiler inside sound absorber, longitudinal degree of depth of sound absorption cavity is 150～300mm.The sound absorption cavity of this depth bounds also can guarantee that sound absorption structure absorbs low-frequency noise.
The aforesaid perforation of the one side for waste heat boiler inside sound absorber, is provided with internal lining pipe in the perforation on sound absorbent perforated structure.
The aforesaid perforation of the one side for waste heat boiler inside sound absorber, the length of described internal lining pipe is 5～10mm.Internal lining pipe being set actual is in order to increase penetration depth, has both guaranteed equivalent plate thickness, has controlled again the weight of sound absorption structure.Find after deliberation, penetration depth absorbs low-frequency noise to sound absorption structure and produces a very large impact.
Compared with conventional art, the utility model provides a kind of perforation of the one side for waste heat boiler inside sound absorber, by being set on perforated plate, a large amount of apertures and internal lining pipe can effectively avoid traditional sound-absorbing porous material to hold susceptible to plugging problem, the sound absorption cavity that perforated plate and liner form has formed resonance absorber jointly, effectively absorbs the inner noise producing of waste heat boiler and a part of noise can be reflected back to noise source.Therefore, thus can reach by this one side for waste heat boiler inside perforation sound absorber being arranged on to the rational position of waste heat boiler absorption boiler inside noise, reduce noise and eliminate the object of the operatic tunes resonance in boiler in the propagation of boiler internal.
Accompanying drawing explanation
Fig. 1 is the structural representation of sound absorption structure;
Fig. 2 is the structural representation of liner plate.
Being labeled as in accompanying drawing: 1-perforated plate, 2-liner plate, the 3-cavity that absorbs sound, 4-internal lining pipe.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Embodiment 1 of the present utility model: a kind of one side perforation sound absorber that is arranged at waste heat boiler furnace chamber inwall, comprise perforated plate 1 and liner plate 2, perforated plate 1 is located at liner plate 2 one sides, and a side of the perforated plate 1 that liner plate 2 is close to is trench structure, makes formation sound absorption cavity 3 between perforated plate 1 and liner plate 2.Perforation place on perforated plate 1 is provided with internal lining pipe 4.The thickness of perforated plate 1 is 3mm; Aperture on perforated plate 1 is 4mm; Punching rate on perforated plate 1 is 0.5%.The degree of depth of sound absorption cavity 3 is 250mm.The length of the internal lining pipe 4 that perforation place arranges is 9mm.
Embodiment 2 of the present utility model: a kind of one side perforation sound absorber of the high pressure evaporator top that is arranged at waste heat boiler, comprise perforated plate 1 and liner plate 2, perforated plate 1 is located at liner plate 2 one sides, one side of the perforated plate 1 that liner plate 2 is close to is trench structure, makes formation sound absorption cavity 3 between perforated plate 1 and liner plate 2.Perforation place on perforated plate 1 is provided with internal lining pipe 4.The thickness of perforated plate 1 is 1mm; Aperture on perforated plate 1 is 4mm; Punching rate on perforated plate 1 is 0.3%.The degree of depth of sound absorption cavity 3 is 230mm.The length of the internal lining pipe 4 that perforation place arranges is 7mm.
Embodiment 3 of the present utility model: a kind of one side perforation sound absorber of the low pressure evaporator top that is arranged at waste heat boiler, comprise perforated plate 1 and liner plate 2, perforated plate 1 is located at liner plate 2 one sides, one side of the perforated plate 1 that liner plate 2 is close to is trench structure, makes formation sound absorption cavity 3 between perforated plate 1 and liner plate 2.Perforation place on perforated plate 1 is provided with internal lining pipe 4.The thickness of perforated plate 1 is 2mm; Aperture on perforated plate 1 is 4mm; Punching rate on perforated plate 1 is 0.3%.The degree of depth of sound absorption cavity 3 is 220mm.The length of the internal lining pipe 4 that perforation place arranges is 7mm.
Embodiment 4 of the present utility model: a kind of one side perforation sound absorber of the high-pressure economizer top that is arranged at waste heat boiler, comprise perforated plate 1 and liner plate 2, perforated plate 1 is located at liner plate 2 one sides, one side of the perforated plate 1 that liner plate 2 is close to is trench structure, makes formation sound absorption cavity 3 between perforated plate 1 and liner plate 2.Perforation place on perforated plate 1 is provided with internal lining pipe 4.The thickness of perforated plate 1 is 2mm; Aperture on perforated plate 1 is 4mm; Punching rate on perforated plate 1 is 0.3%.The degree of depth of sound absorption cavity 3 is 200mm.The length of the internal lining pipe 4 that perforation place arranges is 7mm.
Embodiment 5 of the present utility model: a kind of one side perforation sound absorber of the low pressure evaporator top that is arranged at waste heat boiler, comprise perforated plate 1 and liner plate 2, perforated plate 1 is located at liner plate 2 one sides, one side of the perforated plate 1 that liner plate 2 is close to is trench structure, makes formation sound absorption cavity 3 between perforated plate 1 and liner plate 2.Perforation place on perforated plate 1 is provided with internal lining pipe 4.The thickness of perforated plate 1 is 2mm; Aperture on perforated plate 1 is 3mm; Punching rate on perforated plate 1 is 0.3%.The degree of depth of sound absorption cavity 3 is 200mm.The length of the internal lining pipe 4 that perforation place arranges is 7mm.
Embodiment 6 of the present utility model: a kind of one side perforation sound absorber except oxygen evaporator top that is arranged at waste heat boiler, comprise perforated plate 1 and liner plate 2, perforated plate 1 is located at liner plate 2 one sides, one side of the perforated plate 1 that liner plate 2 is close to is trench structure, makes formation sound absorption cavity 3 between perforated plate 1 and liner plate 2.Perforation place on perforated plate 1 is provided with internal lining pipe 4.The thickness of perforated plate 1 is 2mm; Aperture on perforated plate 1 is 3mm; Punching rate on perforated plate 1 is 0.35%.The degree of depth of sound absorption cavity 3 is 200mm.The length of the internal lining pipe 4 that perforation place arranges is 8mm.
Embodiment 7 of the present utility model: a kind of one side perforation sound absorber of the high-pressure superheater top that is arranged at waste heat boiler, comprise perforated plate 1 and liner plate 2, perforated plate 1 is located at liner plate 2 one sides, one side of the perforated plate 1 that liner plate 2 is close to is trench structure, makes formation sound absorption cavity 3 between perforated plate 1 and liner plate 2.Perforation place on perforated plate 1 is provided with internal lining pipe 4.The thickness of perforated plate 1 is 1mm; Aperture on perforated plate 1 is 5mm; Punching rate on perforated plate 1 is 0.25%.The degree of depth of sound absorption cavity 3 is 230mm.The length of the internal lining pipe 4 that perforation place arranges is 7mm.
Operation principle of the present utility model: at the high-pressure superheater of waste heat boiler, low-pressure superheater, high pressure evaporator, low pressure evaporator, high-pressure economizer, on the inwall of low-pressure coal saver and and waste heat boiler interior except the cavity above oxygen evaporator, be all provided for the one side perforation sound absorber of waste heat boiler inside, this one side perforation sound absorber that is used for waste heat boiler inside is made up of a perforated plate 1 by certain punching rate and liner plate 2 and forms a sound absorption cavity 3, this structure is in fact the one application of resonance sound-absorbing structure, its theoretical foundation is Helmholtz resonator principle.The similar piston of air column in internal lining pipe 4 on perforated plate 1, has certain acoustic mass, and sound absorption cavity 3 is similar to air spring, has certain elasticity, and the two forms a resonator system.In the time that sound wave reaches aperture, under sound wave effect, air column just produces vibration, and frictional damping when vibration makes a part of acoustic energy be converted to thermal energy consumption to dissipate, and due to the unexpected variation of acoustic impedance, a part of acoustic energy will be reflected back sound source simultaneously.Finally reach the noise of absorption boiler inside, the object of the operatic tunes resonance of minimizing noise in propagation, the elimination boiler of boiler internal.
Claims (5)
1. the perforation of the one side for a waste heat boiler inside sound absorber, it is characterized in that: comprise perforated plate (1) and liner plate (2), perforated plate (1) is located at a side of liner plate (2), the side that liner plate (2) is close to perforated plate (1) is trench structure, makes formation sound absorption cavity (3) between perforated plate (1) and liner plate (2).
2. the perforation of the one side for waste heat boiler inside sound absorber according to claim 1, is characterized in that: the thickness of perforated plate (1) is 0.5～5mm; Piercing aperture on perforated plate (1) is 2～10mm; Punching rate on perforated plate (1) is 0.1%～1%.
3. the perforation of the one side for waste heat boiler inside sound absorber according to claim 1, is characterized in that: longitudinal degree of depth of sound absorption cavity (3) is 150～300mm.
4. the perforation of the one side for waste heat boiler inside sound absorber according to claim 1, is characterized in that: in the perforation on perforated plate (1), be provided with internal lining pipe (4).
5. the perforation of the one side for waste heat boiler inside sound absorber according to claim 1, is characterized in that: the length of described internal lining pipe (4) is 5～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320855939.7U CN203703931U (en) | 2013-12-24 | 2013-12-24 | Single-faced perforated sound absorber used for interior of heat recovery boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320855939.7U CN203703931U (en) | 2013-12-24 | 2013-12-24 | Single-faced perforated sound absorber used for interior of heat recovery boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203703931U true CN203703931U (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320855939.7U Expired - Fee Related CN203703931U (en) | 2013-12-24 | 2013-12-24 | Single-faced perforated sound absorber used for interior of heat recovery boiler |
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| Country | Link |
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| CN (1) | CN203703931U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122103A (en) * | 2016-08-24 | 2016-11-16 | 珠海格力电器股份有限公司 | Air conditioner, cross-flow fan and volute structure thereof |
| CN106782475A (en) * | 2015-11-21 | 2017-05-31 | 厦门嘉达声学技术有限公司 | Composite resonant sound absorption structure |
-
2013
- 2013-12-24 CN CN201320855939.7U patent/CN203703931U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782475A (en) * | 2015-11-21 | 2017-05-31 | 厦门嘉达声学技术有限公司 | Composite resonant sound absorption structure |
| CN106782475B (en) * | 2015-11-21 | 2020-02-28 | 厦门嘉达声学技术有限公司 | Composite resonance sound absorption structure |
| CN106122103A (en) * | 2016-08-24 | 2016-11-16 | 珠海格力电器股份有限公司 | Air conditioner, cross-flow fan and volute structure thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20211224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |