Noise reduction structure and waste heat boiler

Abstract

The present application relates to the technical field of noise reduction device, and particularly relates to a noise reduction structure and a waste heat boiler. The noise reduction structure is arranged on a superheater of the waste heat boiler, and comprises a noise reduction piece arranged on a finned tube of the superheater. The noise reduction piece is located at a leeward side of the finned tube and is arranged along the wind direction. The airflow itself has noise, and the airflow also generates a large noise when passing through the finned tube, so that the noise in the superheater is large. The noise reduction in the superheater can effectively reduce the overall noise of the waste heat boiler, so as to achieve the purpose of noise reduction of the waste heat boiler. Moreover, the noise reduction piece is arranged on the finned tube, compared with being arranged on the outside of the boiler body, the inside of the boiler body or the outside of the chimney, the installation and maintenance are more convenient, the material is saved, the cost is relatively low, and the overall performance of the waste heat boiler is not affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of noise reduction device, in particular to a noise reduction structure and a waste heat boiler. BACKGROUND

[0002] The waste heat boiler refers to the boiler that uses the waste heat in various industrial processes, waste materials or waste liquid and the heat generated after the combustion of combustible substances to heat water to a certain temperature. The waste heat boiler can produce hot water or steam through waste heat recovery to supply other sections. For example, the waste heat boiler uses the waste heat generated after power generation to realize secondary utilization, thereby improving the power generation efficiency, so that the waste heat boiler is more and more widely used in the field of power generation. However, a large amount of noise is generated during the use of the waste heat boiler, which seriously affects the work and life of the surrounding residents. Therefore, in order to use the waste heat boiler for power generation in the long run, it is necessary to carry out noise reduction treatment.

[0003] At present, for the noise reduction treatment of the waste heat boiler, some adopt boiler close-fitting enclosure, that is, the boiler body is wrapped to block the propagation of noise, but this method cannot achieve the purpose of effective noise reduction. At the same time, the setting of the boiler close-fitting enclosure is not only high in cost, but also is not conducive to the heat dissipation of the boiler body, which greatly affects the performance of the boiler itself and brings many inconveniences to the daily maintenance and repair of the boiler. Some others install the noise reduction device outside the chimney, which will make the chimney bear a large load and seriously affect the discharge performance of the chimney. The overall noise reduction effect is general, the structure is fixed, the applicability is poor, and the application range is limited. Some others set the sound absorption device inside the waste heat boiler. This method also has the problems of high cost, poor heat dissipation of the boiler body, and inconvenience of daily maintenance and repair. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defects of the prior art, such as the complex structure, high cost and inconvenience of maintenance of the noise reduction structure of the waste heat boiler, so as to provide a noise reduction structure and a waste heat boiler which are simple in structure, low in cost, convenient to maintain and do not affect the overall performance of the waste heat boiler.

[0005] In order to solve the above problems, the noise reduction structure of the present application is arranged on the superheater of the waste heat boiler, which comprises a noise reduction piece arranged on the finned tube of the superheater. The noise reduction piece is located at the leeward side of the finned tube and is arranged along the wind direction.

[0006] One noise reduction piece is arranged on each finned tube.

[0007] The length of the noise reduction piece along the wind direction is 1.5-3 times the diameter of the finned tube.

[0008] The thickness of the noise reduction piece is 0.1-0.2 times the diameter of the finned tube.

[0009] The noise reduction piece is arranged in a staggered state with the finned tube.

[0010] The distance between the tail end of the noise reduction piece along the wind direction and the next row of the finned tube is 1-2 times the diameter of the finned tube.

[0011] The noise reduction piece is welded on the finned tube.

[0012] The noise reduction piece is a steel plate.

[0013] The waste heat boiler of the present application comprises a superheater, and the noise reduction structure described above is arranged on the finned tube in the superheater

[0014] The technical scheme of the present application has the following advantages:

[0015] 1. The noise reduction structure of the present application is arranged on the superheater of the waste heat boiler, and comprises a noise reduction piece arranged on the finned tube of the superheater. The noise reduction piece is located on the leeward side of the finned tube and arranged along the wind direction. The airflow itself has noise, and the airflow also generates a large amount of noise when passing through the finned tube, so that the noise in the superheater is large. Arranging the noise reduction piece in the superheater can effectively reduce the overall noise of the waste heat boiler, so as to achieve the purpose of noise reduction of the waste heat boiler. Moreover, arranging the noise reduction piece on the finned tube is more convenient for installation and maintenance than arranging it on the outside of the boiler body, the inside of the boiler body or the outside of the chimney. It saves materials and has relatively low cost, and does not affect the overall performance of the waste heat boiler.

[0016] 2. The noise reduction structure of the present application is a steel plate. The structure of the noise reduction piece is simple, the material of the steel plate is widely used, and the noise reduction piece is easy to be connected with the finned tube. This makes the cost of the noise reduction structure lower, and the noise reduction structure is more suitable for popularization and use.

[0017] 3. The length of the noise reduction piece along the wind direction is 1.5-3 times the diameter of the finned tube, the thickness of the noise reduction piece is 0.1-0.2 times the diameter of the finned tube, and the distance between the tail end of the noise reduction piece along the wind direction and the next row of the finned tube is 1-2 times the diameter of the finned tube. All of these can make the noise reduction effect of the noise reduction structure better. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical scheme in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural schematic view of the noise reduction structure of the present application.

[0020] Explanation of reference signs:

[0021] 1 – Finned tube; 2 – Noise reduction component. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1:

[0026] The noise reduction structure in this embodiment is installed on the superheater of the waste heat boiler, such as... Figure 1 As shown, it includes a noise reduction component 2 installed on the finned tube 1 of the superheater. The noise reduction component 2 is located on the leeward side of the finned tube 1 and is arranged in the direction of the wind.

[0027] The number of noise reduction components 2 provided on one of the finned tubes 1 is selected according to the usage requirements and the diameter of the finned tube 1. If the finned tube 1 is relatively thick, two noise reduction components 2 can be provided on one finned tube 1. In this embodiment, for a commonly used superheater and finned tube 1, one noise reduction component 2 is provided on one finned tube 1. The length of the noise reduction component 2 along the wind direction is 1.5-3 times the diameter of the finned tube 1, and the thickness of the noise reduction component 2 is 0.1-0.2 times the diameter of the finned tube 1.

[0028] In order to increase the heat exchange effect of the superheater, when the finned tubes 1 are arranged in an alternating manner, the noise reduction component 2 is also arranged in an alternating manner along with the finned tubes 1.

[0029] The distance between the tail end of the noise reduction component 2 and the next row of finned tubes 1 along the wind direction is 1-2 times the diameter of the finned tubes 1. This arrangement can prevent the airflow passing through the noise reduction component 2 from generating turbulence with the immediately downstream finned tubes 1, thus preventing the generation of large noise again.

[0030] In the embodiment, the noise reduction piece 2 is welded on the finned tube 1, and the welding connection mode can ensure the reliability of the connection between the noise reduction piece 2 and the finned tube 1, and can reduce the friction between the noise reduction piece 2 and the finned tube 1 due to vibration.

[0031] In the embodiment, the material of the noise reduction piece 2 is a steel plate. Of course, it can also be other hard sound-absorbing materials. Although the sound-absorbing materials have better noise reduction effect, the corresponding cost will also be increased.

[0032] The noise reduction structure of the embodiment has the following advantages: the noise distribution of the structure is tested by simulation software, the structure in the range of 1.5D-3D behind the finned tube has a noise reduction of greater than 15 decibels, and the resistance is reduced by 50%, wherein D refers to the diameter of the finned tube.

[0033] Embodiment two:

[0034] The waste heat boiler of the application comprises a superheater, and the finned tube 1 in the superheater is provided with the noise reduction structure in embodiment one.

[0035] In use, the waste heat boiler is a gas flow with heat passing through the superheater. The heat in the gas exchanges with the fluid in the finned tube 1, and the fluid in the finned tube 1 is heated and supplied to other sections for use. The gas flow itself has noise, and the gas flow also produces a large amount of noise when passing through the finned tube 1, so that the noise in the superheater is large. Noise reduction in the superheater can effectively reduce the overall noise of the waste heat boiler, achieving the purpose of noise reduction of the waste heat boiler.

[0036] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For those skilled in the art, based on the above description, other different forms of changes or variations can also be made. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the application.

Claims

1. A noise reduction structure, disposed on the superheater of a waste heat boiler, characterized in that, The application relates to a noise reduction piece (2) arranged on a finned tube (1) of a superheater, wherein the noise reduction piece (2) is arranged on the leeward side of the finned tube (1) and along the wind direction; The distance between the tail end of the noise reduction piece (2) along the wind direction and the next row of the finned tubes (1) is 1-2 times the diameter of the finned tube (1); One noise reduction piece (2) is arranged on one finned tube (1); The length of the noise reduction piece (2) along the wind direction is 1.5-3 times the diameter of the finned tube (1); The thickness of the noise reduction piece (2) is 0.1-0.2 times the diameter of the finned tube (1); The noise reduction piece (2) is arranged in a staggered state with the finned tube (1); The noise reduction piece (2) is welded on the finned tube (1).

2. The noise reduction structure of claim 1, wherein, The noise reduction piece (2) is a steel plate.

3. A waste heat boiler, characterized in that The application relates to a superheater, wherein the finned tube (1) of the superheater is provided with the noise reduction structure according to any one of claims 1-2.

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