Durable efficient boiler steam exhaust silencer reliable in structure

Abstract

An efficient boiler steam exhaust silencer reliable in structure and durable comprises a silencer body, a supporting plate and a base used for achieving the overall supporting effect, the supporting plate is transversely installed on the base through a plurality of shock absorbers, and the silencer body is transversely and fixedly installed on the top of the supporting plate; the supporting plate comprises a steam inlet cylinder, a silencing cylinder and a steam outlet cylinder which are fixedly communicated in sequence, a steam inlet of the steam inlet cylinder is connected with a steam inlet flange through a steam inlet hose, a steam outlet of the steam outlet cylinder is connected with a steam outlet flange through a steam outlet hose, and the outer side of the silencing cylinder is sleeved with a heat exchange jacket used for cooling steam in the silencing cylinder. A cooling water inlet and outlet pipeline is fixedly connected to the heat exchange jacket, and a plurality of silencing plates are sequentially arranged in the steam outlet cylinder from one side of the silencing cylinder to one side of the steam outlet. By integrating the high-strength structural design and the multi-stage composite silencing technology, the efficient attenuation and low-resistance steam exhaust of steam exhaust noise are realized while long-term stable operation and durability are ensured.

Description

Technical Field

[0001] This utility model relates to the field of boiler silencer technology, and in particular to a reliable and durable high-efficiency boiler exhaust silencer. Background Technology

[0002] As a core piece of equipment in industrial production and energy conversion, boilers release high-temperature, high-pressure, and high-speed steam during their exhaust process. The resulting loud noise not only severely pollutes the working environment and threatens the hearing health of operators, but may also cause structural fatigue due to vibration, and even lead to major safety hazards such as pipe rupture and safety valve failure. However, traditional boiler exhaust silencers mostly adopt a single resistive or reactive silencing structure, which has obvious technical limitations: resistive silencers rely on porous sound-absorbing materials (such as glass wool and slag wool) to absorb mid-to-high frequency noise, but in the high-temperature steam environment, the materials are prone to ablation and pulverization, resulting in rapid decay of silencing performance; reactive silencers use abrupt changes in the cross-sectional area of ​​the flow channel to induce sound wave reflection and interference to attenuate low-frequency noise, but their structural rigidity is insufficient, and they are prone to resonance under the impact of high-speed steam, causing local stress concentration, resulting in shell cracking or perforated plate detachment.

[0003] In recent years, with increasingly stringent environmental regulations on industrial noise emissions (such as the requirement in China's "Emission Standard for Industrial Enterprises at the Boundary" GB 12348-2008 that daytime noise limits should be ≤65dB(A)), and with boilers developing towards larger capacity and higher parameters (such as supercritical and ultra-supercritical units), the market has placed higher demands on the reliability, durability, and efficiency of exhaust silencers. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a high-efficiency boiler exhaust silencer that integrates high-strength structural design and multi-stage composite silencing technology, which ensures long-term stable and durable operation while achieving efficient attenuation of exhaust noise and low-resistance exhaust.

[0005] The technical problem to be solved by this utility model is achieved through the following technical solution. This utility model is a reliable and durable high-efficiency boiler exhaust silencer. The silencer includes a silencer body, a support plate, and a base for overall support. The support plate is horizontally mounted on the base by several shock absorbers, and the silencer body is horizontally fixedly mounted on the top of the support plate. The support plate includes a steam inlet cylinder, a silencer cylinder, and a steam outlet cylinder that are fixedly connected in sequence. The steam inlet of the steam inlet cylinder is connected to a steam inlet flange for cooperation with an external boiler exhaust pipe through a steam inlet hose. The steam outlet of the steam outlet cylinder is connected to a steam outlet flange for cooperation with an external exhaust equipment through a steam outlet hose. A heat exchange jacket for cooling the steam inside the silencer cylinder is fitted on the outside of the silencer cylinder. Cooling water inlet and outlet pipes are fixedly connected to the heat exchange jacket. Several silencer plates are arranged in sequence inside the steam outlet cylinder from one side of the silencer cylinder to the side of the steam outlet, and each silencer plate is provided with silencer holes.

[0006] The technical problem to be solved by this utility model can also be further achieved through the following technical solutions: For the high-efficiency boiler exhaust silencer with reliable and durable structure described above, both the steam inlet and the steam outlet are funnel-shaped, the silencer is cylindrical, the diameter of the larger opening end of the steam inlet is the same as the diameter of the silencer, and the diameter of the smaller opening end of the steam outlet is the same as the diameter of the silencer.

[0007] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the high-efficiency boiler exhaust silencer with reliable and durable structure described above, a number of heat-conducting plates that penetrate through the silencer are also fixedly installed on the silencer. One end of the heat-conducting plate is set inside the heat exchange jacket, and the other end of the heat-conducting plate is set inside the silencer.

[0008] The technical problem to be solved by this utility model can also be further achieved through the following technical solutions: for the above-mentioned efficient boiler exhaust silencer with reliable and durable structure, the shock absorber is a cylindrical helical spring shock absorber or an air spring airbag shock absorber.

[0009] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the high-efficiency boiler exhaust silencer with reliable and durable structure described above, a drainage pipe with a control valve is also fixedly connected to the bottom of the silencer cylinder.

[0010] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the high-efficiency boiler exhaust silencer with reliable and durable structure described above, the steam inlet hose and steam outlet hose are 316L stainless steel corrugated pipes.

[0011] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the high-efficiency boiler exhaust silencer with reliable and durable structure described above, a sound-absorbing layer is fitted on the outside of the steam inlet, heat exchange jacket and steam outlet.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This silencer achieves high reliability through a shock-absorbing support design and a modular cylinder structure. Several shock absorbers are used to connect the support plate and the base laterally, effectively isolating the vibration and impact during boiler exhaust and significantly extending its service life. At the same time, the silencer body is composed of an inlet cylinder, a silencer cylinder, and an outlet cylinder that are fixedly connected in sequence. The modular design facilitates quick installation, partial maintenance and replacement, reduces the total life cycle maintenance cost, and ensures long-term stable operation.

[0014] 2. This silencer integrates heat exchange cooling noise reduction and multi-stage impedance silencing technology. The heat exchange jacket on the outside of the silencer cools the high-temperature steam through cooling water circulation, reducing the sound velocity and accelerating the attenuation of sound wave energy. Several silencing plates are arranged sequentially along the steam flow direction inside the steam outlet. The silencing holes adopt a gradually changing aperture or streamlined layout, which can achieve a good silencing effect, while also minimizing the impact on boiler exhaust and ensuring efficient exhaust.

[0015] 3. The silencer improves its adaptability to operating conditions through interface design and cooling water recycling. The cooling water of the heat exchange jacket can be connected to the boiler feedwater system or the cooling tower for recycling, reducing water consumption and operating costs. The steam inlet and outlet are equipped with steam inlet flanges and steam outlet flanges respectively, which can be quickly adapted to boiler exhaust pipes of different specifications, reducing the amount of on-site modification work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the sound-absorbing plate of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Reference Figure 1-2A reliable and durable high-efficiency boiler exhaust silencer is disclosed. The silencer includes a silencer body, a support plate 3, and a base 1 for overall support. The base 1 is welded from steel and has anchor bolt holes at the bottom for easy on-site installation. The support plate 3 is horizontally mounted on the base 1 by several shock absorbers 2 to form a flexible support structure, which can play a role in vibration reduction and noise reduction. Preferably, the shock absorbers 2 are cylindrical helical spring shock absorbers 2 or air spring airbag shock absorbers 2. The silencer body is horizontally fixedly mounted on the top of the support plate 3.

[0020] The support plate 3 includes a steam inlet cylinder 4, a silencer cylinder 5, and a steam outlet cylinder 6, which are fixedly connected in sequence. Both the steam inlet cylinder 4 and the steam outlet cylinder 6 are funnel-shaped, and the silencer cylinder 5 is cylindrical. The diameter of the larger opening end of the steam inlet cylinder 4 is the same as the diameter of the silencer cylinder 5, and the diameter of the smaller opening end of the steam outlet cylinder 6 is the same as the diameter of the silencer cylinder 5, forming a streamlined structure of "funnel-cylinder-funnel". This allows the boiler steam to first enter the steam inlet cylinder 4 after being discharged, where the steam velocity is reduced by the gradual expansion design, thus reducing the initial impact noise. Then, it enters the silencer cylinder 5 for silencing treatment, and then passes through the steam outlet cylinder 6, where the steam velocity is further reduced by the gradual expansion design, thus reducing the exhaust impact noise.

[0021] Specifically:

[0022] A heat exchange jacket 9 is fitted on the outside of the muffler 5 to cool the steam inside the muffler 5. A cooling water inlet and outlet pipe 14 is fixedly connected to the heat exchange jacket 9 to facilitate the circulation of cooling water into the heat exchange jacket 9, transferring the heat of the steam to the cooling water, so that the steam temperature drops rapidly, achieving the effect of cooling and noise reduction, while also reducing the thermal damage of high temperature to the muffler structure.

[0023] To further improve heat transfer efficiency, several heat-conducting plates 10 are fixedly installed on the muffler 5, which penetrate the muffler 5. One end of the heat-conducting plate 10 is located inside the heat exchange jacket 9, and the other end of the heat-conducting plate 10 is located inside the muffler 5. Preferably, 8-12 heat-conducting plates 10 are evenly arranged around the muffler 5.

[0024] A drain pipe 15 with a control valve is fixedly connected to the bottom of the muffler 5 to facilitate the periodic discharge of condensate and prevent condensation on the inner wall of the muffler 5 from causing corrosion.

[0025] Several silencing plates 11 are sequentially arranged inside the steam outlet 6 from one side of the silencing cylinder 5 to the side of the steam outlet. Each silencing plate 11 is provided with a silencing hole 17. The silencing plate 11 is used to absorb sound energy more efficiently through friction and resonance between the small holes and the plate in the low-speed steam flow after cooling. Preferably, the silencing holes 17 adopt a gradually changing aperture and staggered arrangement to form multi-level impedance matching and achieve better noise attenuation effect.

[0026] The steam inlet of the steam inlet 4 is connected to the steam inlet flange 7 for use with the external boiler exhaust pipe via the steam inlet hose 8, and the steam outlet of the steam outlet 6 is connected to the steam outlet flange 13 for use with the external exhaust equipment via the steam outlet hose 12. This achieves a flexible connection between the silencer and the external boiler exhaust pipe and the external exhaust equipment, so as to isolate vibration transmission and reduce pipe vibration noise. Preferably, the steam inlet hose 8 and the steam outlet hose 12 are 316L stainless steel corrugated pipes.

[0027] In actual use, a sound-absorbing layer 16 is fitted on the outside of the steam inlet 4, the heat exchange jacket 9 and the steam outlet 6 to reduce the overall noise of the silencer. Preferably, the sound-absorbing layer 16 is a composite sound-absorbing layer of glass wool and aluminum foil.

[0028] The actual working process of the reliable and durable high-efficiency boiler exhaust silencer provided in this application is as follows:

[0029] 1. Steam enters the steam inlet 4 from the boiler exhaust pipe through a 316L stainless steel corrugated pipe. The steam inlet hose 8 isolates boiler vibration and reduces structural radiation noise.

[0030] Steam flows inside the funnel-shaped steam inlet 4, and the cross-sectional area of ​​the flow channel is expanded to the cross-sectional area of ​​the silencer 5. By reducing the pressure, the steam flow velocity is reduced, which significantly weakens the turbulence noise and aerodynamic noise generated by the high-speed steam injection.

[0031] 2. The depressurized steam enters the silencer 5 and exchanges heat with the cooling water in the heat exchange jacket 9. The thermodynamic cooling achieves the effect of cooling and noise reduction, further reducing noise.

[0032] 3. The cooled and noise-reducing steam enters the steam outlet 6, and the cross-sectional area of ​​the flow channel is expanded. The flow velocity is further reduced through secondary pressure reduction, which reduces residual turbulent noise. At the same time, the steam passes through the silencing holes 17 on the multi-stage silencing plate 11 for small hole silencing. The full-frequency noise attenuation is achieved through resonance and small hole friction mechanism.

Claims

1. A reliable and durable high-efficiency boiler exhaust silencer, characterized in that: The silencer includes a silencer body, a support plate, and a base for overall support. The support plate is horizontally mounted on the base via several shock absorbers, and the silencer body is horizontally fixedly mounted on the top of the support plate. The support plate includes a steam inlet cylinder, a silencer cylinder, and a steam outlet cylinder that are fixedly connected in sequence. The steam inlet of the steam inlet cylinder is connected to a steam inlet flange for use with an external boiler exhaust pipe via a steam inlet hose. The steam outlet of the steam outlet cylinder is connected to a steam outlet flange for use with an external exhaust equipment via a steam outlet hose. A heat exchange jacket for cooling the steam inside the silencer cylinder is fitted on the outside of the silencer cylinder. Cooling water inlet and outlet pipes are fixedly connected to the heat exchange jacket. Several silencer plates are sequentially arranged inside the steam outlet cylinder from one side of the silencer cylinder to the side of the steam outlet, and each silencer plate is provided with a silencer hole.

2. The high-efficiency boiler exhaust silencer with reliable structure and durability according to claim 1, characterized in that: Both the steam inlet and outlet are funnel-shaped, and the muffler is cylindrical. The diameter of the larger opening end of the steam inlet is the same as the diameter of the muffler, and the diameter of the smaller opening end of the steam outlet is the same as the diameter of the muffler.

3. The high-efficiency boiler exhaust silencer with reliable structure and durability according to claim 1, characterized in that: Several heat-conducting plates that penetrate the muffler are also fixedly installed on it. One end of the heat-conducting plate is located inside the heat exchange jacket, and the other end of the heat-conducting plate is located inside the muffler.

4. The high-efficiency boiler exhaust silencer with reliable structure and durability according to claim 1, characterized in that: The shock absorber is a cylindrical helical spring shock absorber or an air spring airbag shock absorber.

5. The high-efficiency boiler exhaust silencer with reliable structure and durability according to claim 1, characterized in that: A drain pipe with a control valve is also fixedly connected to the bottom of the silencer.

6. The high-efficiency boiler exhaust silencer with reliable structure and durability according to claim 1, characterized in that: The steam inlet hose and steam outlet hose are made of 316L stainless steel corrugated pipe.

7. The high-efficiency boiler exhaust silencer with reliable structure and durability according to claim 1, characterized in that: Sound-absorbing layers are fitted on the outside of the steam inlet, heat exchange jacket, and steam outlet.

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