Low-noise waste heat boiler

Abstract

The utility model discloses a low-noise waste heat boiler, which relates to the technical field of noise reduction of waste heat boilers, and is characterized in that a silencing cavity is arranged to be a special-shaped cavity, and each inner side wall of the silencing cavity reflects sound waves to the middle part of the silencing cavity, so that the reflection quantity of noise is reduced, and the noise is reduced. The same-frequency resonance phenomenon caused by the fact that noise is reflected to a sound source is basically eliminated, so that vibration fatigue damage possibly caused to equipment is avoided, and the equipment is well protected; meanwhile, the noise is collected in the silencing cavity to offset each other, the silencing effect of the double-sided silencing plate can be enhanced, sound energy of the noise is converted into mechanical energy in cooperation with the use of the sound disturbing part, and the mechanical energy is finally enabled to influence each other to eliminate vibration through mutual influence of vibration of different frequencies, so that a better silencing effect is achieved; according to the low-noise waste heat boiler, better noise elimination and noise reduction effects can be achieved, meanwhile, vibration damage caused by resonance can be eliminated, and the actual use effect is extremely good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of waste heat boiler noise reduction, particularly relates to a low noise waste heat boiler. BACKGROUND

[0002] There are two main reasons for causing waste heat boiler noise pollution, one is that the flow of flue gas resonates in the cavity between the heat exchange pipes to produce a large amount of noise, and the other is that the sound radiation between the waste heat boiler and the chimney can spread the noise produced by the waste heat boiler.

[0003] To solve the above problems, the patent file with publication number "CN203703917U" discloses a low noise waste heat boiler, which comprises a waste heat boiler body, a chimney arranged above the waste heat boiler body, a resonance type silencer arranged above the waste heat boiler body connected with the chimney, and sound absorption structures arranged above the sound absorption cavities of a high-pressure superheater, a high-pressure evaporator, a low-pressure superheater, a high-pressure coal economizer, a low-pressure evaporator and a deaerating evaporator.

[0004] Based on the above search, combined with the prior art, it is found that the existing sound absorption structure mainly adopts a straight cavity with a large inner diameter and a small outer diameter to play a damping and noise reduction role. This noise reduction method can make part of the noise reflect back to the sound source, and the noise reflected back to the sound source can form a same frequency resonance when meeting the new noise. Although the noise can be reduced, the vibration fatigue damage to the internal equipment can be caused. Therefore, a low noise waste heat boiler is needed. UTILITY MODEL CONTENTS

[0005] The purpose of the present application is to provide a low noise waste heat boiler to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a low noise waste heat boiler, comprising a waste heat boiler and a plurality of boiler heat exchange equipment installed in the waste heat boiler, a double-sided sound absorption plate is installed in the cavity between the plurality of boiler heat exchange equipment, a double-sided perforated sound absorption plate is installed on the upper end of the boiler heat exchange equipment near the smoke outlet hole of the waste heat boiler, and a single-sided sound absorption structure is installed on the inner wall of the waste heat boiler near the smoke outlet hole;

[0007] The double-sided sound absorption plate is provided with sound absorption holes, and the sound absorption holes are uniformly distributed on the surface of the double-sided sound absorption plate in contact with the boiler heat exchange equipment;

[0008] The double-sided sound absorption plate is provided with a sound absorption cavity, the sound absorption cavity is a special-shaped cavity, and the inner side walls of the sound absorption cavity reflect sound waves to the middle part of the sound absorption cavity;

[0009] The sound absorption cavity is provided with a sound disturbance part which is affected by noise to produce vibrations of different frequencies.

[0010] As a further supplement to the present application, the sound disturbing member comprises sound disturbing columns, the sound disturbing columns are provided with a plurality of sound disturbing columns and are respectively arranged on different inner walls of the sound absorbing cavities, and the plurality of sound disturbing columns are respectively fixed at different inclined angles with the inner walls of the plurality of sound absorbing cavities.

[0011] Wherein, the directions of the two sound disturbing columns on every two adjacent inner walls of the sound absorbing cavities are different.

[0012] As a further supplement to the present application, the plurality of sound disturbing columns are respectively fixed with secondary frequency sound absorbing hairs on the circumferential sides, the secondary frequency sound absorbing hairs are provided with a plurality of secondary frequency sound absorbing hairs and are irregularly distributed along the circumferential surface of the sound disturbing column, the plurality of secondary frequency sound absorbing hairs form different inclined angles with the surface of the sound disturbing column, and the plurality of inclined angles formed by the plurality of secondary frequency sound absorbing hairs with the surface of the sound disturbing column change irregularly.

[0013] As a further supplement to the present application, the plurality of sound disturbing columns are different in length and shape.

[0014] Wherein, the length between every two adjacent sound disturbing columns is not equal, and the shape between every two adjacent sound disturbing columns is not the same.

[0015] The shape of the sound disturbing column comprises a square column, a circular column, a conical column, a trapezoidal plate and a multi-edge prism.

[0016] As a further supplement to the present application, the plurality of secondary frequency sound absorbing hairs are different in shape and length.

[0017] Wherein, the shape of the secondary frequency sound absorbing hair comprises a bullet-shaped, a spring-shaped and a wave-shaped, the plurality of secondary frequency sound absorbing hairs on each sound disturbing column are the same or different in shape, and the plurality of secondary frequency sound absorbing hairs on each sound disturbing column are different in length.

[0018] As a further supplement to the present application, the sound absorbing cavity is a prismatic cavity, and the inner wall of the prismatic cavity of the sound absorbing cavity is a horizontal wall or a concave wall.

[0019] Wherein, a non-right angle is formed between the intersecting edges of the inner walls of two adjacent sound absorbing cavities.

[0020] As a further supplement to the present application, the sound disturbing column and the secondary frequency sound absorbing hair are both elastic bodies made of metal or non-metal materials, and the sound disturbing column and the secondary frequency sound absorbing hair vibrate when affected by the sound waves of the noise.

[0021] In summary, the technical effects and advantages of the present application are:

[0022] 1. The utility model discloses, through the anechoic cavity is set to the special-shaped cavity, and make each inside wall of anechoic cavity reflect the sound wave to the middle part of anechoic cavity, thereby reduce the reflection amount of noise, basically eliminate the same frequency resonance phenomenon caused by noise reflection to sound source, thereby avoid the vibration fatigue damage that possibly causes to equipment, and play good protection effect to equipment itself, simultaneously, the noise is condensed in the anechoic cavity and is mutually offset, also can enhance the sound -absorbing effect of double -sided sound -absorbing board spare, and the sound energy of noise is converted into mechanical energy with the use of the sound disturbing piece, and through the mutual influence of different frequency vibration, finally make mechanical energy influence each other and eliminate vibration, to this end reach better sound -absorbing effect.

[0023] Compared with the prior art, the low-noise waste heat boiler can achieve better sound-absorbing and noise-reducing effect, and can also eliminate the vibrational damage caused by resonance, and has excellent actual use effect.

[0024] 2. The utility model discloses, through the setting of the sound disturbing column and the secondary frequency sound-absorbing hair, when the noise is reflected in the anechoic cavity multiple times, multiple different length, different shape sound disturbing columns produce different frequency, different intensity, stress direction different vibration under the influence of noise, so that most of the sound energy of noise can be converted into mechanical energy, and mutual interference can be generated between multiple sound disturbing columns, further eliminating vibration, thereby quickly consuming mechanical energy and achieving better sound-absorbing effect.

[0025] The secondary frequency sound-absorbing hair also produces vibration under the influence of noise, and because the shapes, lengths of multiple secondary frequency sound-absorbing hairs are different, and the multiple oblique included angles formed by the surfaces of multiple secondary frequency sound-absorbing hairs and sound disturbing columns change irregularly, the vibration frequencies, intensities, and stress directions of multiple secondary frequency sound-absorbing hairs are different, so that the vibration between multiple secondary frequency sound-absorbing hairs and sound disturbing columns can be further interfered and offset, further improving the sound-absorbing effect of the double-sided sound-absorbing board spare, avoiding fatigue damage to the boiler heat exchange equipment caused by vibration, and further improving the actual use effect of the low-noise waste heat boiler. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Fig. 1 It is a schematic diagram of the three-dimensional structure in the embodiment;

[0028] Fig. 2 It is a schematic diagram of the partial cross-sectional structure of the double-sided sound-absorbing board spare in the embodiment;

[0029] Fig. 3 It is a partial structure enlarged schematic view of the double-sided sound-absorbing plate in the embodiment.

[0030] In the figure: 1, waste heat boiler; 2, boiler heat exchange equipment; 3, double-sided sound-absorbing plate; 31, sound-absorbing hole; 32, sound-absorbing cavity; 4, double-sided perforated sound-absorbing plate; 5, single-sided sound-absorbing structure; 6, sound-disturbing column; 7, sub-frequency sound-absorbing hair. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Embodiment: Referring to Figs. 1-3 The low-noise waste heat boiler shown in the figure comprises a waste heat boiler 1 and a plurality of boiler heat exchange equipment 2 installed in the waste heat boiler 1. The plurality of boiler heat exchange equipment 2 are respectively a high-pressure superheater, a high-pressure evaporator, a low-pressure superheater, a high-pressure economizer, a low-pressure evaporator, an oxygen removal evaporator, and a condensate heater known in the prior art. Their structures and working principles are well known to those skilled in the art, and will not be described here. A double-sided sound-absorbing plate 3 is installed in the cavity between the plurality of boiler heat exchange equipment 2. A double-sided perforated sound-absorbing plate 4 is installed on the upper end of the boiler heat exchange equipment 2 near the smoke outlet of the waste heat boiler 1. A single-sided sound-absorbing structure 5 is installed on the inner wall of the waste heat boiler 1 near the smoke outlet.

[0033] The double-sided sound-absorbing plate 3 is provided with sound-absorbing holes 31. The sound-absorbing holes 31 are provided in multiple numbers and are uniformly distributed on the surface of the double-sided sound-absorbing plate 3 in contact with the boiler heat exchange equipment 2.

[0034] The double-sided sound-absorbing plate 3 is provided with sound-absorbing cavities 32. The sound-absorbing cavities 32 are special-shaped cavities. The inner side walls of the sound-absorbing cavities 32 reflect sound waves towards the middle part of the sound-absorbing cavities 32.

[0035] The sound-absorbing cavities 32 are prismatic cavities. The inner walls of the prismatic cavities of the sound-absorbing cavities 32 are horizontal walls or concave walls. The intersection edges between the inner walls of two adjacent sound-absorbing cavities 32 form a non-right-angle included angle, which can better reflect the noise entering the sound-absorbing cavities 32 multiple times with convergence.

[0036] The sound-absorbing cavities 32 are provided with sound-disturbing members that produce vibrations of different frequencies under the influence of noise.

[0037] Based on the above structure, by setting the sound absorption cavity 32 as a special-shaped cavity, and making each inner side wall of the sound absorption cavity 32 reflect sound waves to the middle part of the sound absorption cavity 32, the amount of noise reflection is reduced, the phenomenon of resonance caused by noise reflection to the sound source is basically eliminated, and the vibration fatigue damage that may be caused to the equipment is avoided, thereby playing a good protective role on the equipment itself; at the same time, the noise is collected in the sound absorption cavity 32 and counteracted, which can also enhance the sound absorption effect of the double-sided sound absorption plate 3, and the sound energy of the noise is converted into mechanical energy through the use of the sound disturbing part, and the mechanical energy is influenced by different frequencies, and finally the mechanical energy is influenced and eliminated to achieve better sound absorption effect.

[0038] Compared with the prior art, the low-noise waste heat boiler can achieve better sound absorption and noise reduction effect, and can also eliminate the vibration damage caused by resonance, and the actual use effect is excellent.

[0039] Further, the sound disturbing part includes sound disturbing columns 6, the sound disturbing columns 6 are provided with a plurality of sound disturbing columns 6 and are respectively located on different inner walls of the sound absorption cavities 32, and the plurality of sound disturbing columns 6 are fixed at different inclined angles with the inner walls of the plurality of sound absorption cavities 32.

[0040] Among them, the directions of the two sound disturbing columns 6 on the inner walls of each two adjacent sound absorption cavities 32 are different.

[0041] The lengths and shapes of the plurality of sound disturbing columns 6 are different, and the sound disturbing columns 6 can be provided as any one of a square column, a circular column, a tapered column, a trapezoidal plate, and a polygonal prism, or other commonly used plate-shaped and columnar structures.

[0042] Among them, the lengths of each two adjacent sound disturbing columns 6 are different, and the shapes of each two adjacent sound disturbing columns 6 are different.

[0043] When the noise is reflected in the sound absorption cavities 32 for multiple times, the plurality of sound disturbing columns 6 of different lengths and shapes are vibrated at different frequencies, different intensities, and different stress directions under the influence of the noise, so that most of the sound energy of the noise can be converted into mechanical energy, and the plurality of sound disturbing columns 6 can interfere with each other to further eliminate the vibration, thereby quickly consuming the mechanical energy and achieving better sound absorption effect.

[0044] Further, the plurality of sound disturbing columns 6 are fixed with secondary frequency sound absorption hairs 7 on the circumferential sides, the secondary frequency sound absorption hairs 7 are provided with a plurality of secondary frequency sound absorption hairs 7 and are irregularly distributed along the circumferential surface of the sound disturbing column 6, the plurality of secondary frequency sound absorption hairs 7 form different inclined angles with the surface of the sound disturbing column 6, and the plurality of inclined angles formed by the plurality of secondary frequency sound absorption hairs 7 and the surface of the sound disturbing column 6 change irregularly.

[0045] The shapes and lengths of the plurality of secondary frequency sound absorption hairs 7 are different.

[0046] The shape of the sub-frequency sound-absorbing hair 7 includes a bullet shape, a spring shape and a wave shape, the shapes of the plurality of sub-frequency sound-absorbing hairs 7 on each sound disturbance column 6 are the same or different, and the lengths of the plurality of sub-frequency sound-absorbing hairs 7 on each sound disturbance column 6 are different.

[0047] The sub-frequency sound-absorbing hair 7 also vibrates when affected by noise, and the shapes and lengths of the plurality of sub-frequency sound-absorbing hairs 7 are different, and the plurality of oblique angles formed between the plurality of sub-frequency sound-absorbing hairs 7 and the surface of the sound disturbance column 6 are irregular, so that the vibration frequencies, intensities and stress directions of the plurality of sub-frequency sound-absorbing hairs 7 are different, thereby further interfering with and canceling the vibration between the sound disturbance column 6, further improving the sound-absorbing effect of the double-sided sound-absorbing plate 3, avoiding fatigue damage caused by vibration to the boiler heat exchange equipment 2, and further improving the actual use effect of the low-noise waste heat boiler.

[0048] It should be noted that the sound disturbance column 6 and the sub-frequency sound-absorbing hair 7 are elastic bodies made of metal or non-metal materials, and the vibration of the sound disturbance column 6 and the sub-frequency sound-absorbing hair 7 when affected by noise is a standard, and those skilled in the art can select them according to actual use requirements.

[0049] The utility model works: in the daily use process, when noise is generated in the waste heat boiler 1, the noise enters the sound-absorbing cavity 32 through the sound-absorbing hole 31, the sound-absorbing cavity 32 is reflected to the middle part of the sound-absorbing cavity 32 by the profiled inner side wall, thereby reducing the reflection amount of noise, basically eliminating the same frequency resonance phenomenon caused by noise reflection to the sound source, thereby avoiding the vibration fatigue damage that may be caused to the equipment, and playing a good protection role on the equipment itself, and simultaneously, the noise is collected in the sound-absorbing cavity 32 and is mutually canceled, and the sound-absorbing effect of the double-sided sound-absorbing plate 3 can also be enhanced, and in combination with the sound disturbance column 6 and the sub-frequency sound-absorbing hair 7, the sound energy of the noise can be converted into mechanical energy, and the different frequency vibrations influence each other, and finally the mechanical energy influences and eliminates the vibration, so that a better sound-absorbing effect is achieved.

[0050] Compared with the prior art, the low-noise waste heat boiler can achieve better sound-absorbing and noise-reducing effects, and can also eliminate the vibration damage caused by resonance, and has excellent actual use effect.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and does not limit the utility model, and although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to some technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A low-noise waste heat boiler, comprising a waste heat boiler (1) and a plurality of boiler heat exchange devices (2) installed in the waste heat boiler (1), a double-sided sound-absorbing plate (3) is installed in the cavity between the plurality of boiler heat exchange devices (2), a double-sided perforated sound-absorbing plate (4) is installed on the upper end of the boiler heat exchange device (2) near the smoke outlet of the waste heat boiler (1), and a single-sided sound-absorbing structure (5) is installed on the inner wall of the waste heat boiler (1) near the smoke outlet, characterized in that: a sound-absorbing hole (31) is formed on the double-sided sound-absorbing plate (3), a plurality of sound-absorbing holes (31) are uniformly distributed on the surface of the double-sided sound-absorbing plate (3) in contact with the boiler heat exchange device (2); a sound-absorbing cavity (32) is formed in the double-sided sound-absorbing plate (3), the sound-absorbing cavity (32) is a special-shaped cavity, and each inner wall of the sound-absorbing cavity (32) reflects sound waves to the middle of the sound-absorbing cavity (32); a sound disturbing member is arranged in the sound-absorbing cavity (32) to generate vibrations of different frequencies under the influence of noise. The sound disturbing member comprises a sound disturbing column (6), the sound disturbing column (6) is provided with a plurality of sound disturbing columns (6) arranged on different inner walls of the sound-absorbing cavity (32), and the plurality of sound disturbing columns (6) are fixed at different inclined angles with the inner walls of the plurality of sound-absorbing cavities (32), respectively. The directions of the two sound disturbing columns (6) on the inner walls of every two adjacent sound-absorbing cavities (32) are different. The periphery of each sound disturbing column (6) is fixed with a secondary frequency sound-absorbing hair (7), the secondary frequency sound-absorbing hair (7) is provided with a plurality of secondary frequency sound-absorbing hairs (7) irregularly distributed along the surface of the sound disturbing column (6), the plurality of secondary frequency sound-absorbing hairs (7) form different inclined angles with the surface of the sound disturbing column (6), and the plurality of inclined angles formed by the plurality of secondary frequency sound-absorbing hairs (7) and the surface of the sound disturbing column (6) change irregularly.

2. A low-noise waste heat boiler according to claim 1, characterized in that The lengths and shapes of the plurality of sound disturbing columns (6) are different. The lengths of every two adjacent sound disturbing columns (6) are different, and the shapes of every two adjacent sound disturbing columns (6) are different.

3. A low-noise waste heat boiler according to claim 2, characterized in that: The shapes of the sound disturbing column (6) include square column, circular column, conical column, trapezoidal plate and polygonal prism.

4. A low-noise waste heat boiler according to claim 2, characterized in that: The shapes, lengths and shapes of the plurality of secondary frequency sound-absorbing hairs (7) are different. The shapes of the secondary frequency sound-absorbing hair (7) include elastic sheet, spring and wave, the shapes of the plurality of secondary frequency sound-absorbing hairs (7) on each sound disturbing column (6) are the same or different, and the lengths of the plurality of secondary frequency sound-absorbing hairs (7) on each sound disturbing column (6) are different. The sound-absorbing cavity (32) is a prismatic cavity, and the inner wall of the prismatic cavity of the sound-absorbing cavity (32) is a horizontal wall or a concave wall.

5. A low-noise waste heat boiler according to claim 3, characterized in that: The intersection between the inner walls of two adjacent sound-absorbing cavities (32) forms a non-right angle. The sound disturbing column (6) and the secondary frequency sound-absorbing hair (7) are elastic bodies made of metal or non-metal materials, and generate vibrations under the influence of sound waves of noise.

6. A low-noise waste heat boiler according to claim 1, characterized in that: ​ ​ 7. A low-noise heat recovery boiler according to claim 3, characterized in that: ​

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