Exhaust, heat insulation and noise reduction device of gas generator set

Abstract

The utility model relates to an exhaust, heat insulation and noise reduction device of a gas generator set, which comprises a barrel, a porous metal inner sleeve coaxial with the barrel is fixed in the barrel, and an aluminum silicate needled felt layer is arranged between the inner wall of the barrel and the porous metal inner sleeve. The high-temperature-resistant and fire-resistant aluminum silicate needled felt layer is laid on the inner wall of the cylinder body, the porous metal inner sleeve is arranged on the surface of the aluminum silicate needled felt layer to press and compact the aluminum silicate needled felt layer, the porous metal inner sleeve plays a role in supporting and fixing the aluminum silicate needled felt layer, and it is guaranteed that the aluminum silicate needled felt layer does not fall off; when the silencer is used, exhaust obstruction is not formed on an inner channel of the silencer, the aluminum silicate needled felt layer plays a role in heat insulation and heat preservation, meanwhile, noise hot airflow generated by gas generator set exhaust enters the cylinder body and penetrates through meshes of the porous metal inner sleeve, and noise sound waves are flexibly absorbed through irregular fiber fine holes in the high-temperature-resistant and fire-resistant aluminum silicate needled felt layer. And the effects of completely absorbing sound and reducing noise are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of silencers, in particular to an exhaust heat insulation and silencer device for a gas generator set. Background Art

[0002] Coal mine gas, also known as coalbed methane, is a mixture of methane, carbon dioxide, and nitrogen that escapes from coal and surrounding rock. Gas is a harmful element in coal mining operations. It not only pollutes the air but, when the gas content in the air reaches 5% to 16%, can cause explosions and accidents when exposed to fire. Controlling gas concentrations in coal mining is a crucial technical indicator for safe production, and gas-fired power generation technology contributes significantly to coal mine safety, environmental protection, and economic benefits. Firstly, gas-fired power generation technology can effectively address coal mine gas accidents and improve safe production conditions. If gas is not utilized and directly released into the atmosphere, its greenhouse effect is approximately 21 times that of carbon dioxide. Therefore, utilizing gas-fired power generation not only reduces greenhouse gas emissions and increases clean energy supply, but also improves the economic benefits of enterprises. Gas-fired power generation technology not only plays a significant role in improving coal mine safety and production conditions, but also offers significant economic and environmental benefits.

[0003] Currently, gas-fired internal combustion engine generator sets are the most widely used and utilized gas-fired power generation technology. The exhaust temperature of a gas-fired internal combustion engine can reach as high as 600°C. To prevent burns to equipment operators and maintenance personnel and the high temperatures within the production plant, the exhaust duct must be insulated. The duct is then connected to the exterior of the plant and vented after being silenced by a muffler. Existing mufflers are manufactured using 316L stainless steel or 310S high-temperature stainless steel, which are extremely costly. The high exhaust temperatures of gas-fired internal combustion engines preclude the use of inexpensive carbon steel (with a temperature resistance of ≤500°C). Long-term operation in high-temperature environments can cause fatigue and aging of the metal, leading to reduced strength, thermal deformation and bending of the muffler, and even cracks in welds and the risk of equipment collapse. Utility Model Content

[0004] Based on this, in order to solve the technical problems that the current gas generator set silencer equipment works in a high temperature environment for a long time, the metal materials will experience material fatigue and aging, the strength will be reduced, the silencer equipment will be thermally deformed and bent, and even cracks will appear in the welds and the equipment will collapse, the utility model proposes a gas generator set exhaust heat insulation silencer device.

[0005] The utility model provides an exhaust heat insulation and silencing device for a gas generator set, which comprises a cylinder, a porous metal inner sleeve coaxial with the cylinder is fixed inside the cylinder, and an aluminum silicate needle-punched felt layer is arranged between the inner wall of the cylinder and the porous metal inner sleeve.

[0006] The utility model lays a high-temperature resistant and fire-resistant aluminum silicate needle punched felt layer on the inner wall of the cylinder, and arranges a porous metal inner sleeve on the surface of the aluminum silicate needle punched felt layer to compact the aluminum silicate needle punched felt layer. The porous metal inner sleeve plays a supporting and fixing role for the aluminum silicate needle punched felt layer, ensuring that the aluminum silicate needle punched felt layer does not fall off and does not form an exhaust obstruction in the internal channel of the silencer. The aluminum silicate needle punched felt layer plays a role of heat insulation and heat preservation. At the same time, the noisy hot air flow generated by the exhaust of the gas generator set enters the cylinder and penetrates the mesh holes of the porous metal inner sleeve. The irregular fiber pores in the high-temperature resistant and fire-resistant aluminum silicate needle punched felt layer flexibly absorb the noise sound waves, thereby achieving the effect of complete sound absorption and noise reduction.

[0007] As a further improvement of the above-mentioned scheme of the present invention, the cylinder includes a middle cylindrical section and a reducing section integrally formed at both axial ends of the middle cylindrical section. The diameter of the reducing section gradually decreases from one end close to the middle cylindrical section to the end away from the middle cylindrical section, and an air inlet and an air outlet are respectively formed on the two reducing sections.

[0008] As a further improvement of the above solution of the present invention, the outer wall of the middle cylindrical section is provided with a plurality of ring-shaped heat dissipation fins at intervals along its axial direction.

[0009] As a further improvement of the above-mentioned solution of the utility model, a plurality of scattered heat dissipating fins 2 are circumferentially arranged on the outer wall of the variable diameter section, and a heat dissipating fin 3 is arranged between any two adjacent heat dissipating fins 2, and the length of the heat dissipating fin 3 is less than the length of the heat dissipating fin 2.

[0010] As a further improvement of the above-mentioned scheme of the utility model, the two reducing sections are respectively integrally connected with the air inlet pipe and the air outlet pipe. The ends of the air inlet pipe and the air outlet pipe away from the reducing sections are open and form an air inlet and an air outlet respectively. The aluminum silicate needle-punched felt layer and the porous metal inner sleeve both extend into the air inlet pipe and the air outlet pipe.

[0011] As a further improvement of the above solution of the present invention, the outer surfaces of the air inlet pipe and the air outlet pipe are provided with multiple ring-shaped heat dissipation fins four along their axial directions.

[0012] As a further improvement of the above-mentioned scheme of the present invention, three sound-absorbing baffles are arranged at intervals in the middle cylindrical section along the direction of air flow. The sound-absorbing baffle in the middle is penetrated by a flow pipe with two points passing through, and the two sound-absorbing baffles on the outside are penetrated by multiple silencer pipes. The silencer pipes are located on the side of the sound-absorbing baffle away from the air inlet and have multiple ventilation holes.

[0013] As a further improvement of the above solution of the present invention, the multiple silencer pipes on each sound-absorbing partition are evenly distributed on the circumference and the circumference is coaxially arranged with the cylinder.

[0014] As a further improvement of the above solution of the present invention, the cylinder is a carbon steel cylinder structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The utility model lays a high-temperature resistant and fire-resistant aluminum silicate needle felt layer on the inner wall of the cylinder for heat insulation and heat preservation. A porous metal inner sleeve is arranged on the surface of the aluminum silicate needle felt layer to compact the aluminum silicate needle felt layer so that the aluminum silicate needle felt layer is close to the inner wall of the cylinder. The porous metal inner sleeve plays a supporting and fixing role for the aluminum silicate needle felt layer, ensuring that the aluminum silicate needle felt layer does not fall off and does not form an exhaust obstruction in the internal channel of the silencer, ensuring that the exhaust pressure of the gas generator set works normally; the noisy hot air flow generated by the exhaust of the gas generator set enters the cylinder, and the noisy hot air flow is The blocking of the sound-absorbing partition and the guiding effect of the silencer pipe and the circulation pipe change the direction of the airflow, and the airflow generates vortex in the cylinder. Part of the noise waves are offset by mutual collision, and part of the noise waves are rigidly offset after eddy collision due to the uneven surface of the porous metal inner sleeve. The remaining noise waves penetrate the mesh of the porous metal inner sleeve and are flexibly absorbed by the irregular fiber pores in the high-temperature and fire-resistant aluminum silicate needle-punched felt layer, thereby achieving the effect of complete sound absorption and noise reduction. Through the above structure, the cylinder is protected from high-temperature damage while also having the function of noise reduction.

[0017] 2. The utility model welds heat dissipation fins 1, 2 and 3 on the outside of the cylinder, and welds heat dissipation fins 4 on the outside of the air inlet pipe and the air outlet pipe. The waste heat conducted to the outer surface of the cylinder comes into contact with the ambient air through the heat dissipation surfaces of the 1, 2, 3 and 4 heat dissipation fins, thereby achieving natural cooling, avoiding the risk of burns to personnel caused by the waste heat on the outer surface of the silencer, and improving the safety of on-site operation and maintenance personnel.

[0018] 3. The above structural setting of the utility model enables the cylinder to be made of cheap carbon steel, greatly reducing the manufacturing cost, and can effectively prevent the risk of metal fatigue deformation and distortion, weld desoldering and leakage, and even collapse of the entire structure caused by the damage of the cylinder made of metal material to high temperature, avoid casualties and fire accidents, eliminate safety hazards, reduce maintenance and repair intensity, improve power generation efficiency, and improve the economic benefits of the enterprise, which is of great significance to improving the on-site environment and safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an exhaust heat insulation and silencer device for a gas generator set proposed in an embodiment of the utility model;

[0020] Figure 2 This is a front view of an exhaust heat insulation and silencer device for a gas generator set proposed in an embodiment of the utility model;

[0021] Figure 3A half-section view of an exhaust heat insulation and silencer device for a gas generator set proposed in an embodiment of the present utility model;

[0022] Figure 4 for Figure 2 Middle AA section view;

[0023] Figure 5 This is a partially enlarged schematic diagram of an exhaust heat insulation and silencer device for a gas generator set proposed in an embodiment of the utility model.

[0024] Figure markings: 1. Cylinder; 1-1. Middle cylindrical section; 1-2. Variable diameter section; 1-3. Air inlet; 1-4. Air outlet; 1-5. Air inlet pipe; 1-6. Air outlet pipe; 2. Porous metal inner sleeve; 3. Aluminum silicate needle-punched felt layer; 4. Heat sink fin one; 5. Heat sink fin two; 6. Heat sink fin three; 7. Heat sink fin four; 8. Sound-absorbing baffle; 9. Circulation pipe; 10. Silencer; 10-1. Vent; 11. Rain shield; 12. Bracket. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] In view of the technical problems that the current gas generator set silencer equipment works in a high-temperature environment for a long time, the metal materials will experience material fatigue and aging, the strength will be reduced, the silencer equipment will be thermally deformed and bent, and even cracks will appear at the welds and the equipment will collapse, this embodiment proposes a gas generator set exhaust insulation and silencer device.

[0028] Reference Figure 1 、 Figure 2The exhaust heat insulation and silencer device for a gas generator set proposed in this embodiment includes a cylinder 1. The cylinder 1 includes a vertically arranged central cylindrical section 1-1 and a reducing section 1-2 integrally formed at the upper and lower ends of the central cylindrical section 1-1. The diameter of the reducing section 1-2 gradually decreases from the end closest to the central cylindrical section 1-1 to the end farther away from the central cylindrical section 1-1. The bottom reducing section 1-2 is integrally connected to an air inlet pipe 1-5, and the top reducing section 1-2 is integrally connected to an air outlet pipe 1-6. The bottom end of the air inlet pipe 1-5 and the top end of the air outlet pipe 1-6 are both open and form an air inlet port 1-3 and an air outlet port 1-4, respectively.

[0029] Combine Figure 3 , three sound-absorbing baffles 8 are arranged in the middle cylindrical section 1-1 at intervals along the direction of air flow, and the three sound-absorbing baffles 8 divide the interior of the cylinder 1 into four sections of silencer chambers. In this embodiment, the three sound-absorbing baffles 8 are all circular in structure, and the outer edges of the sound-absorbing baffles 8 are connected to the inner wall of the middle cylindrical section 1-1. Among them, a flow pipe 9 with two ends passing through is pierced through the middle position of the sound-absorbing baffle 8 in the middle, and the flow pipe 9 is coaxially arranged with the cylinder 1. The two sound-absorbing baffles 8 on both sides are pierced with a plurality of silencer pipes 10, and the multiple silencer pipes 10 on each sound-absorbing baffle 8 are evenly distributed around the circumference. The silencer pipe 10 is open at one end close to the air inlet 1-3 and the silencer pipe 10 is evenly provided with a plurality of vents 10-1 on the side of the sound-absorbing baffle 8 away from the air inlet 1-3. The number of silencer pipes 10 can be appropriately set according to actual conditions. In this embodiment, eight silencer pipes 10 are provided on each sound-absorbing baffle 8, and the ends of the silencer pipes 10 away from the air inlets 1-3 are closed. Of course, in this embodiment, the number of silencer pipes 10 can also be six, seven, or other numbers, and the ends of the silencer pipes 10 away from the air inlets 1-3 can also be open.

[0030] Combine Figure 4 、 Figure 5A layer of aluminum silicate needle punched felt layer 3 is provided on the inner wall of the cylinder 1. In order to fix the aluminum silicate needle punched felt layer 3 on the inner surface of the cylinder 1, in this embodiment, a porous metal inner sleeve 2 is further provided outside the aluminum silicate needle punched felt layer 3 in the cylinder 1. To facilitate installation, in this embodiment, the porous metal inner sleeve 2 is divided into four sections and the four sections are respectively arranged in the four sections of the sound-absorbing chamber. The bottom end of the porous metal inner sleeve 2 section in the lowest layer extends to the air inlet 1-3 position and is welded to the flange plate outside the air inlet 1-3, and the top end of the porous metal inner sleeve 2 section in the lowest layer is welded to the sound-absorbing baffle 8 above it, thereby fixing the aluminum silicate needle felt on the inner wall of the sound-absorbing chamber in the lowest layer to the cylinder 1; the upper and lower ends of the porous metal inner sleeve 2 sections in the middle two layers are respectively welded to the two adjacent sound-absorbing baffles 8, thereby fixing the aluminum silicate needle felt on the inner wall of the sound-absorbing chamber on both sides in the middle to the cylinder 1; the bottom end of the porous metal inner sleeve 2 section in the upper layer is welded to the sound-absorbing baffle 8 below it and its top end extends to the air outlet 1-4 position and is welded to the flange outside the air outlet 1-4, thereby fixing the aluminum silicate needle felt on the inner wall of the sound-absorbing chamber in the upper layer to the cylinder 1.

[0031] In this embodiment, the outer wall of the central cylindrical section 1-1 is provided with multiple ring-shaped heat sink fins 4 spaced axially. The outer walls of both reducing sections 1-2 are circumferentially provided with multiple scattered heat sink fins 2 5. Between any two adjacent heat sink fins 2 5 is a heat sink fin 3 6, which is shorter than the length of the heat sink fin 2 5. The outer surfaces of the inlet pipe 1-5 and outlet pipe 1-6 are also provided with multiple ring-shaped heat sink fins 9 7 along their axial directions. The barrel 1, inlet pipe 1-5, outlet pipe 1-6, and each heat sink fin are all made of carbon steel.

[0032] The exhaust heat insulation and silencer device of the gas generator set of this embodiment is arranged through the above structure. An aluminum silicate needle punched felt layer 3 is arranged on the inner wall of the cylinder 1 for heat insulation. Three sound-absorbing partitions 8 are installed inside the cylinder 1 to divide the interior of the cylinder 1 into four sections of silencer chambers. An air inlet pipe 1-5 and an air outlet pipe 1-6 are respectively arranged at the upper and lower ends of the cylinder 1. A high-temperature resistant and fire-resistant aluminum silicate needle punched felt layer 3 is laid on the inner wall of the cylinder 1. A porous metal inner sleeve 2 is arranged on the surface of the aluminum silicate needle punched felt layer 3 to compact the aluminum silicate needle punched felt layer 3 so that the aluminum silicate needle punched felt layer 3 is close to the inner wall of the cylinder 1. The expansion of the porous metal inner sleeve 2 plays a supporting and fixing role on the aluminum silicate needle punched felt layer 3, so that the aluminum silicate needle punched felt layer 3 does not fall off and does not form an exhaust obstruction in the internal channel of the silencer, thereby ensuring the exhaust pressure of the gas generator set. Normal operation; when working, the noisy hot air flow generated by the exhaust of the gas generator set enters the cylinder 1 from the air inlet 1-3, and the noisy hot air flow is blocked by the sound-absorbing partition 8 and the guidance effect of the silencer 10 and the circulation pipe 9, which changes the direction of the airflow. The airflow generates vortices in the four-section silencer chamber. Part of the noise sound waves are offset by mutual collision, and part of them are affected by the uneven surface of the high-temperature resistant porous metal inner sleeve 2, resulting in the rigid offset of the noise sound wave eddy collision. The remaining noise sound waves penetrate through the mesh and are flexibly absorbed by the irregular fiber pores in the high-temperature resistant and fire-resistant aluminum silicate needle-punched felt layer 3, so as to achieve the effect of complete sound absorption and noise reduction. Through the above structure, the heat insulation of the aluminum silicate needle-punched felt layer 3 can protect the cylinder 1 from high-temperature damage while also playing a noise reduction function. At the same time, the waste heat conducted to the outer surface of the cylinder 1 comes into contact with the ambient air through the heat dissipation surfaces of the heat dissipation fins 1 4 , 2 5 , 3 6 , and 4 7 , thereby achieving natural cooling, avoiding the risk of burns to personnel caused by the waste heat on the outer surface of the silencer, and improving the safety of on-site operation and maintenance personnel.

[0033] The above structural setting of the gas generator set exhaust heat insulation and silencer device of this embodiment forms a sound-absorbing and noise-reducing structure by installing an aluminum silicate needle-punched felt layer 3 and a porous metal inner sleeve 2 inside the cylinder 1. The noise sound waves pass through the triple sound-absorbing materials of the sound-absorbing partition 8, the porous metal inner sleeve 2 and the aluminum silicate needle-punched felt layer 3, and come into contact with the noise sound waves in advance, completely blocking and consuming the noise sound wave energy, with good sound absorption and noise reduction effects, avoiding vibration of the overall structure caused by the noise sound waves being transmitted to the cylinder 1, causing vibration friction between the overall structure and the gas generator set exhaust and the elevated fixed support points, thereby avoiding the generation of secondary noise and the risk of desoldering and looseness of the fixed support points.

[0034] The above structural arrangement of the exhaust heat insulation and silencer device of the gas generator set in this embodiment is such that the cylinder 1 operates at a low temperature. Compared with the existing silencer, the cylinder 1 of the silencer device in this embodiment can be made of cheap carbon steel, which greatly reduces the manufacturing cost. It can effectively prevent the cylinder 1 made of metal material from being damaged by high temperature, which may cause metal fatigue deformation and distortion, weld desoldering and leakage, and even the risk of collapse of the entire structure, thereby avoiding casualties and fire accidents, eliminating safety hazards, reducing the intensity of maintenance and overhaul, improving power generation efficiency, and improving the economic benefits of the enterprise, which is of great significance to improving the on-site environment and safe production.

[0035] The exhaust heat insulation and silencer device of the gas generator set in this embodiment does not need to be insulated on the outside, and the device body is completely exposed, which is convenient for equipment operation inspection personnel to observe and find operating leaks in time.

[0036] It should be noted that the outlet pipes 1-6 of this embodiment are connected to an exhaust duct, which can also be provided with a porous metal inner sleeve 2 and aluminum silicate needle-punched felt to improve heat insulation and noise reduction. The exhaust port of the exhaust duct is connected to a rain cap 11 via multiple brackets 12.

[0037] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A gas generator set exhaust heat insulation and silencer, comprising a cylinder (1), characterized in that: A coaxial porous metal inner sleeve (2) is fixed inside the cylinder (1), and an aluminum silicate needle-punched felt layer (3) is provided between the inner wall of the cylinder (1) and the porous metal inner sleeve (2).

2. The exhaust heat insulation and silencer device for a gas generator set according to claim 1 is characterized in that: The cylinder (1) comprises a central cylindrical section (1-1) and diameter-reducing sections (1-2) integrally formed at both axial ends of the central cylindrical section (1-1); the diameter of the diameter-reducing section (1-2) gradually decreases from an end close to the central cylindrical section (1-1) to an end away from the central cylindrical section (1-1); and an air inlet (1-3) and an air outlet (1-4) are respectively formed on the two diameter-reducing sections (1-2).

3. The exhaust heat insulation and silencer device for a gas generator set according to claim 2, characterized in that: The outer wall of the middle cylindrical section (1-1) is provided with a plurality of ring-shaped heat dissipation fins (4) at intervals along its axial direction.

4. The exhaust heat insulation and silencer device for a gas generator set according to claim 2, characterized in that: A plurality of heat dissipation fins (5) are arranged circumferentially on the outer wall of the variable diameter section (1-2) in a scattered distribution. A heat dissipation fin (6) is arranged between any two adjacent heat dissipation fins (5). The length of the heat dissipation fin (6) is less than that of the heat dissipation fin (5).

5. The exhaust heat insulation and silencer device for a gas generator set according to claim 2, characterized in that: The two diameter-reducing sections (1-2) are respectively integrally connected with an air inlet pipe (1-5) and an air outlet pipe (1-6); one end of the air inlet pipe (1-5) and the air outlet pipe (1-6) away from the diameter-reducing section (1-2) is open and respectively forms an air inlet (1-3) and an air outlet (1-4); the aluminum silicate needle-punched felt layer (3) and the porous metal inner sleeve (2) both extend into the air inlet pipe (1-5) and the air outlet pipe (1-6).

6. The exhaust heat insulation and silencer device for a gas generator set according to claim 2, characterized in that: The outer surfaces of the air inlet pipe (1-5) and the air outlet pipe (1-6) are both provided with multiple ring-shaped heat dissipation fins (7) along their axial directions.

7. The exhaust heat insulation and silencer device for a gas generator set according to claim 2, characterized in that: Three sound-absorbing baffles (8) are arranged at intervals along the airflow direction in the middle cylindrical section (1-1); a two-point through-flow pipe (9) is passed through the middle sound-absorbing baffle (8); a plurality of silencer pipes (10) are passed through the two outer sound-absorbing baffles (8); and the silencer pipes (10) are located on a side of the sound-absorbing baffle (8) away from the air inlet (1-3) and have a plurality of ventilation holes (10-1).

8. The exhaust heat insulation and silencer device for a gas generator set according to claim 7, characterized in that: The plurality of silencer pipes (10) on each sound-absorbing partition (8) are evenly distributed on a circle, and the circle is coaxially arranged with the cylinder (1).

9. The exhaust heat insulation and silencer device for a gas generator set according to claim 1, characterized in that: The cylinder (1) is a carbon steel cylinder (1) structure.

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