A noise reduction guide shroud for a secondary air fan of a waste heat boiler

Abstract

This utility model discloses a noise-reducing guide hood for a secondary air fan of a waste heat boiler, relating to the field of boiler secondary air supply technology. It includes: a guide hood body; an integrally formed expanding mask fixedly mounted at one end of the guide hood body; an air outlet connecting component mounted on one side of the expanding mask, which is at least used for connecting to the boiler; an air inlet connecting component mounted at the end of the guide hood body away from the expanding mask, which is at least used for connecting to the air outlet of the fan; a perforated aluminum plate fixedly installed inside the guide hood body; and several air guide plates mounted on the inner wall of the perforated aluminum plate. The guide hood body used can reduce the noise of the fan, and by utilizing the perforated aluminum plate and air guide plates, it can guide the air while reducing the noise generated by air transport, achieving the purpose of silent air transport.

Description

Technical Field

[0001] This utility model relates to the field of boiler secondary air supply technology, specifically a noise reduction guide shroud for a waste heat boiler secondary air fan. Background Technology

[0002] During combustion in a boiler, the primary air fan typically supplies primary air directly to the combustion chamber (furnace) to ignite the fuel and maintain initial combustion. The secondary air fan supplies secondary air to the combustion zone (such as the upper part of the furnace or secondary air ducts) to supplement oxygen, promote complete fuel combustion, and aid in flue gas mixing and cooling.

[0003] Since the noise level at the outlet of a secondary air fan is generally higher than that at the inlet, noise reduction is typically achieved by installing a soundproof enclosure around the entire secondary air fan. However, this method is costly, and the outlet is directly connected to the boiler, resulting in high temperatures. The high temperature issue is easily overlooked when designing noise reduction measures for the secondary air fan. Therefore, we propose a noise-reducing guide hood for a waste heat boiler secondary air fan. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a noise reduction guide hood for a secondary air fan of a waste heat boiler, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a noise reduction guide hood for a secondary air fan of a waste heat boiler, comprising: a guide hood body: an integrally formed expansion mask is fixedly provided at one end of the guide hood body;

[0006] An air outlet connection component is provided on one side of the expansion mask, and the air outlet connection component is used at least for connecting to a boiler;

[0007] The air inlet connection component is provided at the end of the air guide body away from the expansion mask, and the air inlet connection component is used to connect to the air outlet of the fan at least.

[0008] A perforated aluminum plate is fixedly installed inside the body of the flow guide.

[0009] Several air guide plates are provided on the inner wall of the perforated aluminum plate.

[0010] As a preferred embodiment of this utility model, the air guide body is composed of a stainless steel outer plate, a polyurethane foam core layer, and a ceramic inner layer.

[0011] As a preferred embodiment of this invention, the flared structure of the mask has an flare angle of at least thirty degrees.

[0012] As a preferred embodiment of the present invention, the air outlet connection assembly includes a flange plate one and a flange plate two, and bolt holes are provided on the flange plate one and the flange plate two.

[0013] A butyl rubber gasket is provided on the outer side between flange plate one and flange plate two;

[0014] An aerogel composite liner is provided on the inner side between flange plate one and flange plate two.

[0015] As a preferred embodiment of this invention, a rubber pad is provided inside the air inlet connecting assembly, and the air inlet connecting assembly is connected to the fan through the rubber pad.

[0016] As a preferred embodiment of this invention, the inner surface of the perforated aluminum plate is provided with sound-absorbing holes.

[0017] As a preferred embodiment of the present invention, the air guide plate includes a honeycomb perforated portion and a smooth surface portion;

[0018] The honeycomb pores are located near the fan;

[0019] The smooth surface is located on the side closest to the boiler.

[0020] This utility model provides a noise reduction guide shroud for a secondary air fan of a waste heat boiler, which has the following beneficial effects:

[0021] The air deflector body used can reduce the noise of the fan. At the same time, the perforated aluminum plate and air deflector can guide the air while reducing the noise generated by air transportation, so as to achieve the purpose of silent air transportation. Attached Figure Description

[0022] Figure 1 This is a perspective view of an angle structure of a noise reduction guide shroud for a secondary air fan of a waste heat boiler according to this utility model.

[0023] Figure 2 This is a three-dimensional view of the noise reduction guide shroud of a waste heat boiler secondary air fan according to this utility model from another angle.

[0024] Figure 3 This is a three-dimensional cross-sectional view of a noise reduction guide shroud for a secondary air fan of a waste heat boiler according to the present invention.

[0025] Figure 4 This is a front cross-sectional view of the noise reduction guide shroud for a secondary air fan of a waste heat boiler according to the present invention.

[0026] Figure 5 This is a schematic diagram of the internal structure of the guide shroud body of a noise reduction guide shroud for a secondary air fan of a waste heat boiler according to this utility model.

[0027] 1. Air deflector body; 11. Stainless steel outer plate; 12. Polyurethane foam core layer; 13. Ceramic inner layer; 2. Air diffuser; 3. Air outlet connection assembly; 31. Flange plate one; 32. Flange plate two; 33. Bolt holes; 34. Aerogel composite liner; 35. Butyl rubber gasket; 4. Air inlet connection assembly; 5. Perforated aluminum plate; 6. Air deflector; 61. Honeycomb perforation; 62. Smooth surface. Detailed Implementation

[0028] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0029] like Figures 1-5 As shown, this utility model provides a technical solution: a noise reduction guide hood for a secondary air blower of a waste heat boiler, comprising: a guide hood body 1; an integrally formed expansion mask 2 is fixedly installed at one end of the guide hood body 1; an air outlet connection component 3 is provided on one side of the expansion mask 2, the air outlet connection component 3 being used at least for connecting to the boiler; an air inlet connection component 4 is provided at the end of the guide hood body 1 away from the expansion mask 2, the air inlet connection component 4 being used at least for connecting to the air outlet of the blower; a perforated aluminum plate 5 is fixedly installed inside the guide hood body 1; a plurality of air guide plates 6 are provided on the inner wall of the perforated aluminum plate 5.

[0030] In this embodiment, it includes: a fairing body 1;

[0031] Specifically, the fairing body 1 is composed of a stainless steel outer plate 11, a polyurethane foam core layer 12, and a ceramic inner layer 13. The stainless steel outer plate 11 ensures the height and corrosion resistance of the fairing, the polyurethane foam core layer 12 serves the purpose of sound insulation, and the inner surface of the ceramic inner layer 13 is smooth, which is more conducive to the contact and transportation of air, avoids the generation of friction noise, and also achieves the effect of noise reduction.

[0032] In this embodiment, an integrally formed expansion mask 2 is fixedly provided at one end of the flow guide body 1;

[0033] Specifically, the flared structure of the expanding mask 2 has an opening angle of at least 30 degrees. Through the expanding mask 2, the air pressure can be reduced, so that the air can be evenly supplied into the interior of the boiler. The inner cross-section of the expanding mask 2 is larger than the inner cross-section of the guide shroud body 1.

[0034] In this embodiment, an air outlet connection component 3 is provided on one side of the expansion mask 2, and the air outlet connection component 3 is at least used for connecting to the boiler;

[0035] Specifically, the air outlet connection assembly 3 includes a flange plate 31 and a flange plate 32, and bolt holes 33 are provided on the flange plate 31 and the flange plate 32.

[0036] Specifically, a butyl rubber gasket 35 is provided on the outer side between flange plate 31 and flange plate 32 to absorb low-frequency vibration noise; it is also oil- and corrosion-resistant.

[0037] Specifically, an aerogel composite liner 34 is provided on the inner side between flange plate 1 31 and flange plate 2 32. Since this part is connected to the boiler and the temperature is high, the thermal conductivity of the aerogel composite liner 34 is as low as 0.015W / (m·K), and it has both ultra-low density and sound absorption properties; it is also resistant to high temperature (above 600℃).

[0038] In this embodiment, an air inlet connection component 4 is provided at the end of the air guide body 1 away from the expansion mask 2. The air inlet connection component 4 is at least used to connect to the air outlet of the fan.

[0039] Specifically, a rubber pad is installed inside the air inlet connecting component 4. The air inlet connecting component 4 is connected to the fan through the rubber pad. Since the air inlet connecting component 4 is connected to the fan, the temperature here is low, so a noise-reducing rubber pad that is not resistant to high temperature can be used. It also includes a flange for connection.

[0040] In this embodiment, a perforated aluminum plate 5 is fixedly installed inside the flow guide body 1;

[0041] Specifically, the inner surface of the perforated aluminum plate 5 is provided with sound-absorbing holes. The perforated aluminum plate 5 has a cylindrical structure, which allows the air drawn in by the fan to flow through the interior of the perforated aluminum plate 5 and reduce noise.

[0042] In this embodiment, a plurality of air guide plates 6 are provided on the inner wall of the perforated aluminum plate 5;

[0043] Specifically, the air deflector 6 includes a honeycomb perforated portion 61 and a smooth surface portion 62, with the honeycomb perforated portion 61 located near the fan;

[0044] Specifically, the side of the smooth face 62 closest to the boiler has the highest noise level at the connection between the fan and the guide shroud body 1. The generated air flows through the honeycomb perforation 61 to achieve airflow and noise reduction. As the air flows inside the guide shroud body 1, it is blown into the interior of the boiler along the guide of the smooth face 62.

Claims

1. A noise-reducing fairing for a waste heat boiler secondary air fan, comprising: The air deflector body (1) is characterized in that: an integrally formed air deflector (2) is fixedly provided at one end of the air deflector body (1); An air outlet connection component (3) is provided on one side of the expansion mask (2), and the air outlet connection component (3) is used at least for connecting to the boiler; An air inlet connection assembly (4) is provided at one end of the shroud body (1) away from the expansion mask (2), and the air inlet connection assembly (4) is at least used to connect to the air outlet of the fan; A perforated aluminum plate (5) is fixedly installed inside the body of the flow guide (1); Several air guide plates (6) are provided on the inner wall of the perforated aluminum plate (5).

2. The noise reduction and flow guide cover of the secondary air fan of the waste heat boiler according to claim 1, characterized in that: The air deflector body (1) is composed of a stainless steel outer plate (11), a polyurethane foam core layer (12), and a ceramic inner layer (13).

3. The noise reduction and flow guide cover of the secondary air fan of the waste heat boiler according to claim 1, characterized in that: The flared structure of the mask (2) has an opening angle of at least thirty degrees.

4. The noise reduction guide shroud for a secondary air fan of a waste heat boiler according to claim 1, characterized in that: The air outlet connection assembly (3) includes a flange plate one (31) and a flange plate two (32), and bolt holes (33) are provided on the flange plate one (31) and the flange plate two (32); A butyl rubber gasket (35) is provided on the outer side between flange plate one (31) and flange plate two (32); An aerogel composite liner (34) is provided on the inner side between flange plate one (31) and flange plate two (32).

5. The noise reduction guide shroud for a secondary air fan of a waste heat boiler according to claim 1, characterized in that: The air inlet connecting assembly (4) is provided with a rubber pad inside, and the air inlet connecting assembly (4) is connected to the fan through the rubber pad.

6. The noise reduction guide shroud for a secondary air fan of a waste heat boiler according to claim 1, characterized in that: The inner surface of the perforated aluminum plate (5) is provided with sound-absorbing holes.

7. The noise reduction guide shroud for a secondary air fan of a waste heat boiler according to claim 1, characterized in that: The air deflector (6) includes a honeycomb perforated portion (61) and a smooth surface portion (62); The honeycomb perforation (61) is located near the fan; The smooth surface (62) is located on the side closest to the boiler.

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