Exhaust silencing device and gas turbine generator set

Abstract

The utility model discloses an exhaust silencing device and a gas turbine generator set, the exhaust silencing device comprises an exhaust flexible connector, a silencing elbow and an exhaust silencer, the exhaust flexible connector is used for being connected with the gas turbine generator set, and the exhaust flexible connector is provided with a telescopic structure used for absorbing thermal displacement; the silencing elbow comprises an air inlet end and an exhaust end, the air inlet end is connected to the exhaust flexible connector, the exhaust end is arranged in the vertical direction, and a silencing structure is arranged in the silencing elbow; the exhaust silencer is connected to the upper portion of the exhaust end of the silencing elbow in the vertical direction, and a plurality of silencing barrels are arranged in the exhaust silencer in the airflow direction and used for absorbing and attenuating noise. According to the utility model, the exhaust flexible connection prevents thermal displacement from affecting the gas turbine box body; multiple sections of steel plates are installed and welded inside the silencing elbow, transition is smooth, and flow resistance is low; silencing barrels in the silencer are arranged in a matrix mode, and stable operation of the whole device is facilitated; the whole device is stable in structure and small in occupied area.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbine generator sets, in particular to an exhaust silencer and a gas turbine generator set. Background Art

[0002] During operation, gas turbine generator sets emit a large amount of high-temperature, high-speed combustion exhaust gas, which also generates a lot of noise. Therefore, the exhaust system needs to be silenced.

[0003] Traditional gas turbine exhaust silencers generally use flange connections at both ends, with silencers installed after the middle part is expanded to achieve the effect of noise reduction. The entire equipment needs to be designed according to specific exhaust parameters, and has high requirements for airflow resistance, noise reduction effect, and expansion absorption.

[0004] Furthermore, gas turbine exhaust noise is very loud, exceeding 120 decibels. To achieve emissions below 85 decibels, traditional mufflers must be large and require strict construction sites. Furthermore, the high exhaust temperature of gas turbines requires consideration of thermal expansion and contraction, necessitating a sliding base support for the muffler, which is less stable.

[0005] Chinese patent CN117128097A discloses a gas turbine silencer structure and a gas turbine equipped therewith. The structure comprises a first silencer disposed at the gas turbine's intake end, a second silencer disposed at the gas turbine's exhaust section, and a third silencer disposed within the exhaust section flow passage. The first, second, and third silencers are adapted to absorb and / or attenuate exhaust noise passing through the exhaust section flow passage. The first, second, and third silencers are all disposed in the same plane, resulting in a large installation footprint. Furthermore, the structure fails to account for thermal expansion and contraction, resulting in insufficient stability. Utility Model Content

[0006] The utility model provides an exhaust silencer and a gas turbine generator set, which solve the technical problems of the existing gas turbine silencer structure, such as large floor space and insufficient overall structural stability.

[0007] According to one aspect of the utility model, an exhaust silencer is provided, which includes an exhaust flexible connection, a silencer elbow and an exhaust silencer connected in sequence, the exhaust flexible connection is used to be connected to the exhaust port of a gas turbine generator set, and the exhaust flexible connection has a retractable structure for absorbing thermal displacement; the silencer elbow includes an air inlet end and an exhaust end, the air inlet end is connected to the exhaust flexible connection, the exhaust end is arranged in a vertical direction, and a silencer structure for noise reduction is arranged inside the silencer elbow; the exhaust silencer is connected above the exhaust end of the silencer elbow in a vertical direction, and several groups of silencers are arranged inside the exhaust silencer along the airflow direction for absorbing and / or attenuating noise.

[0008] Furthermore, the retractable structure of the exhaust flexible connection is a bellows structure.

[0009] Furthermore, the exhaust flexible connection also includes an inner cylinder, which is arranged inside the bellows structure. The inner cylinder is a smooth cylindrical structure with a taper, and is used to reduce the air resistance of the flow channel.

[0010] Furthermore, the inner tube is fixedly connected to the flange at one end close to the exhaust port, and is suspended at one end away from the exhaust port, so that the inner tube can freely expand and contract with the bellows structure to absorb thermal displacement.

[0011] Furthermore, the silencer elbow comprises several sections of steel plates, which are connected by welding, and the deflection angle between each two sections of the steel plates is no more than 20°. The steel plates expand step by step from the air inlet end to the exhaust end to form an elbow structure.

[0012] Furthermore, a base is provided at the bottom of the silencer elbow, and a plurality of reinforcing ribs for supporting the silencer elbow are provided between the silencer elbow and the base.

[0013] Furthermore, the sound-absorbing structure on the sound-absorbing elbow is a heat-insulating interlayer, and the heat-insulating interlayer is provided with a plurality of support plates for providing the heat-insulating interlayer with a preset space, and the preset space is used for placing the sound-absorbing material.

[0014] Furthermore, a slope structure inclined toward the bottom is provided between the air inlet end of the silencer elbow and the bottom of the silencer elbow, and a hydrophobic device is provided at the bottom of the silencer elbow, and the hydrophobic device is used to discharge sewage.

[0015] Furthermore, several groups of the silencers form a matrix structure, and the silencers have the same spacing to make the internal flow field uniform. The silencer is provided with a cone tip structure at one end close to the silencer elbow to reduce the flow resistance and vibration caused by airflow impact.

[0016] According to another aspect of the present invention, a gas turbine generator set is provided. The gas turbine generator set includes an exhaust system, and the exhaust system includes the exhaust silencer.

[0017] The utility model has the following beneficial effects:

[0018] The exhaust silencer device of the present invention includes an exhaust flexible connection, a silencer elbow and an exhaust silencer connected in sequence, wherein the exhaust flexible connection, the silencer elbow and the exhaust silencer form an air flow channel that is interconnected, wherein the exhaust flexible connection is connected to the exhaust port of the gas turbine generator set, and a large amount of high-temperature and high-speed combustion exhaust gas discharged by the gas turbine generator set enters the silencer elbow and the exhaust silencer in sequence from the exhaust flexible connection, so as to absorb and / or attenuate the noise through the silencer structure in the silencer elbow and several groups of silencers in the exhaust silencer, so as to ensure that the noise reduction capability meets the relevant requirements of the gas turbine; the exhaust flexible connection offsets the thermal displacement caused by the thermal expansion and contraction effect brought about by the absorption of high-temperature exhaust gas through a retractable structure, thereby avoiding the thermal displacement affecting the gas turbine casing, and at the same time, several groups of silencers are arranged along the air flow direction, and the air flow flows upward from the vertically arranged exhaust end, and the thermal displacement caused by the flow of high-temperature air flow expands upward and no longer affects the overall structure, thereby improving the stability of the overall structure and allowing the high-temperature exhaust gas to be smoothly discharged from the exhaust silencer to the outside. The air inlet end of the silencer elbow is connected to the exhaust flexible connection, and the exhaust muffler is connected above the exhaust end of the silencer elbow in a vertical direction, so that the exhaust flexible connection, the silencer elbow and the exhaust muffler are integrated and arranged. The exhaust end is arranged in a vertical direction, so that the vertically arranged exhaust muffler no longer occupies horizontal space, thereby improving site utilization and reducing floor space. Compared with the existing technology, this solution reduces the floor space while ensuring the noise reduction capability, and also improves the stability of the overall structure, and is suitable for gas turbines.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention is further described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a structural diagram of the exhaust flexible connection;

[0022] Figure 2 Schematic diagram of the cross-sectional structure of the silencer elbow;

[0023] Figure 3Schematic diagram of the top view of the silencer elbow;

[0024] Figure 4 Schematic diagram of the cross-sectional structure of the exhaust muffler;

[0025] Figure 5 Schematic diagram of the exhaust muffler from a top view.

[0026] In the figure: 10. Exhaust flexible connection; 11. Retractable structure; 12. Outer wall panel; 13. Insulation material; 14. Inner tube; 15. Flange; 20. Silencer elbow; 21. Inlet end; 22. Exhaust end; 23. Steel plate; 24. Base; 25. Reinforcement rib; 26. Insulation interlayer; 27. Support plate; 28. Slope structure; 29. Drain device; 30. Exhaust muffler; 31. Muffler; 32. Cone tip structure. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0028] See also Figures 1 to 5 , an embodiment of the first aspect of the present utility model provides an exhaust silencer device, which includes an exhaust flexible connection 10, a silencer elbow 20 and an exhaust silencer 30 connected in sequence, wherein the exhaust flexible connection 10 is used to be connected to the exhaust port of the gas turbine generator set, and the exhaust flexible connection 10 has a retractable structure 11 for absorbing thermal displacement; the silencer elbow 20 includes an air inlet end 21 and an exhaust end 22, the air inlet end 21 is connected to the exhaust flexible connection 10, and the exhaust end 22 is arranged in a vertical direction, and a silencer structure for noise reduction is arranged inside the silencer elbow; the exhaust silencer 30 is connected above the exhaust end 22 of the silencer elbow 20 in a vertical direction, and several groups of silencers 31 are arranged inside the exhaust silencer 30 along the air flow direction for absorbing and / or attenuating noise.

[0029] See also Figure 1 , it should be noted that, Figure 1The middle arrow indicates the direction of airflow. The two ends of the exhaust flexible connection 10 are connected to the exhaust port of the gas turbine generator set in a detachable manner, such as by flange 15 connection or bolt connection, which is convenient for inspection and maintenance. The exhaust flexible connection 10 adopts a high-temperature resistant metal flexible connection. The exhaust flexible connection 10 has a telescopic structure 11, wherein the telescopic structure 11 can be a bellows, or other high-temperature resistant and telescopic structure. By adopting the telescopic structure 11, the exhaust flexible connection 10 can adapt to the thermal displacement of the exhaust caused by the thermal expansion and contraction effect of the high-temperature exhaust. In addition, in this embodiment, a thermal insulation material 13 is filled between the exhaust flexible connection 10 and the outer wall panel 12 of the exhaust silencer. The thermal insulation material 13 can be an insulating material such as glass fiber, asbestos, rock wool, or an aerogel felt, polyurethane foam board, etc. The thermal insulation material 13 adopts a material with a low thermal conductivity and good thermal insulation effect, which can isolate the internal heat source and avoid the damage caused by excessive temperature of the outer wall panel 12. The muffler elbow 20 includes an air inlet end 21, a curved section, and an exhaust end 22. The air inlet end 21 is connected to the exhaust flexible connection 10, so that the air flow channels of the exhaust flexible connection 10 and the muffler elbow 20 are interconnected. The air inlet end 21 is arranged in a horizontal direction, and the exhaust end 22 is arranged in a vertical direction, so that the high-temperature exhaust gas entering the muffler elbow 20 from the air inlet end 21 passes through the curved section and upward from the vertical exhaust end 22 into the exhaust channel of the exhaust muffler 30. The air inlet end 21 of the muffler elbow 20 can be supported and fixed to the ground by a base 24 to reduce the floor space. In addition, a thermal insulation and silencer material can also be arranged inside the muffler elbow 20 or between the muffler elbow 20 and the outer wall panel. The thermal insulation and silencer material plays a role in heat insulation and can also absorb some noise, thereby playing a role in noise reduction. The exhaust silencer 30 is connected to the top of the exhaust end 22 of the silencer elbow 20 in the vertical direction. The high-temperature exhaust gas entering the exhaust silencer 30 is discharged upward into the chimney. The exhaust silencer 30 is arranged in the vertical direction so that the thermal displacement expands upward. The exhaust silencer device of the present invention is fixed to the ground through the silencer elbow 20, which can improve the structural stability of the entire device while reducing the footprint. Several groups of silencers 31 are arranged inside the exhaust silencer 30 along the airflow direction, and the airflow flows through the gaps between the several groups of silencers 31. Thermal insulation and silencer materials are arranged on the silencer 31 and the silencer wall panels of the exhaust channel. The thermal insulation and silencer materials are preferably rock wool that is environmentally friendly and harmless to the human body, and is used to absorb and attenuate noise.

[0030] The exhaust muffler device of the present invention comprises an exhaust flexible connection 10, a muffler elbow 20 and an exhaust muffler 30 connected in sequence, wherein the exhaust flexible connection 10, the muffler elbow 20 and the exhaust muffler 30 form an air flow channel that is interconnected, wherein the exhaust flexible connection 10 is used to be connected to the exhaust port of the gas turbine generator set, and a large amount of high-temperature and high-speed combustion exhaust gas discharged from the gas turbine generator set enters the muffler elbow 20 and the exhaust muffler 30 from the exhaust flexible connection 10 to be absorbed and discharged by the muffler structure in the muffler elbow and the several groups of mufflers in the exhaust muffler. / or attenuate noise to ensure that the noise reduction capability meets the relevant requirements of the gas turbine; the exhaust flexible connection 10 offsets the thermal displacement caused by the thermal expansion and contraction effect caused by the absorption of high-temperature exhaust gas through the retractable structure 11, thereby avoiding the thermal displacement affecting the gas turbine casing. At the same time, several groups of silencers are arranged along the airflow direction, and the airflow flows upward from the vertically arranged exhaust end. The thermal displacement caused by the flow of high-temperature airflow expands upward and no longer affects the overall structure, thereby improving the stability of the overall structure and allowing the high-temperature exhaust gas to be smoothly discharged from the exhaust muffler 30 to the chimney. The air inlet end 21 of the silencer elbow 20 is connected to the exhaust flexible connection 10, and the exhaust muffler 30 is connected above the exhaust end 22 of the silencer elbow 20 in the vertical direction, so that the exhaust flexible connection 10, the silencer elbow 20 and the exhaust muffler 30 are integrated and arranged. The exhaust end 22 is arranged in the vertical direction, so that the vertically arranged exhaust muffler 30 no longer occupies horizontal space, thereby improving site utilization and reducing floor space. Compared with the prior art, this solution reduces the floor space while ensuring noise reduction capability and improves the stability of the overall structure, and is suitable for gas turbines.

[0031] In this embodiment, see Figure 1 The retractable structure 11 of the exhaust flexible connection 10 is a bellows structure, and both ends of the exhaust flexible connection 10 are connected to the exhaust elbow and the exhaust port of the gas turbine generator set through flanges 15. The exhaust flexible connection 10 adopts a bellows structure to absorb axial and radial thermal displacement. The bellows has good flexibility and has the characteristics of light weight, corrosion resistance, and high temperature resistance. It can compensate for the mutual displacement of the connection ends of pipelines or machines and equipment, absorb vibration energy, and play a role in vibration reduction and silencing. Sealing strips are provided at the flanges 15 at both ends of the exhaust flexible connection 10. The sealing strips are used to improve the airtightness of the connection between the exhaust flexible connection 10 and the silencer elbow 20 and the exhaust port of the gas turbine generator set. The sealing strips are made of high-temperature resistant graphite material.

[0032] In this embodiment, the exhaust flexible connector 10 also includes an inner cylinder 14, which is positioned within the bellows structure. This inner cylinder 14 is a smooth, tapered cylindrical structure designed to reduce air resistance. This application incorporates inner cylinder 14 within the bellows structure. This inner cylinder 14 has a smooth inner wall and is made of a high-temperature-resistant metal material. High-temperature exhaust gas passes through this inner cylinder 14, thereby reducing air resistance. Furthermore, a gap is provided between inner cylinder 14 and the bellows structure in the exhaust flexible connector 10, further providing heat insulation and sound absorption.

[0033] In this embodiment, the inner tube 14 is fixedly connected to the flange 15 at the end closest to the exhaust port, while the end remote from the exhaust port is suspended, allowing the inner tube 14 to expand and contract freely with the bellows structure to absorb thermal displacement. The end closest to the exhaust port is connected to the flange 15, thereby connecting the inner tube 14 to the bellows structure. The end remote from the exhaust port is suspended, meaning that the end remote from the exhaust port is not connected to the bellows structure or the muffler elbow 20, allowing the inner tube 14 to expand and contract freely with the bellows structure to absorb thermal displacement. Preferably, the length of the inner tube 14 is greater than the length of the bellows structure. More preferably, the inner tube 14 partially extends through the flange 15 into the muffler elbow 20, allowing high-temperature exhaust gas to enter the muffler elbow 20 directly from the inner tube 14, thereby reducing air resistance in the flow path and preventing leakage of high-temperature exhaust gas from the connection at the flange 15.

[0034] In this embodiment, see Figure 2 and Figure 3 The muffler elbow 20 includes a plurality of steel plates 23, which are connected by welding. The deflection angle between each two steel plates 23 is no more than 20 degrees. The steel plates 23 expand step by step from the air inlet end 21 to the exhaust end 22 to form an elbow structure. The muffler elbow 20 is welded together by a plurality of steel plates 23. The steel plates 23 gradually deflect from the vertical steel plates 23 at the air inlet end 21 to the curved section. The deflection angle between each two steel plates 23 is no more than 20 degrees, so that the high-temperature exhaust gas flow transitions smoothly to reduce the air flow resistance. The structure of the muffler elbow 20 enables it to absorb a certain amount of thermal expansion. The steel plates 23 at the exhaust end 22 are arranged in a vertical direction and do not need to be set with a deflection angle, thereby forming a vertical exhaust end 22, which is convenient for connecting the exhaust muffler 30.

[0035] In this embodiment, a base 24 is provided at the bottom of the muffler elbow 20, and a plurality of reinforcing ribs 25 for supporting the muffler elbow 20 are provided between the muffler elbow 20 and the base 24. In this application, the muffler elbow 20 is fixed to the ground through the base 24, and an outer wall panel is also provided on the outer side of the muffler elbow 20. A plurality of reinforcing ribs 25 for supporting and fixing the muffler elbow 20 are provided between the muffler elbow 20 and the base 24 or between the muffler elbow 20 and the outer wall panel. Since the height of the air inlet end 21 of the muffler elbow 20 from the base 24 and the width of the air outlet end 22 from the outer wall panel are different, the height of the reinforcing ribs 25 can be set according to the height of the air inlet end 21 of the muffler elbow 20 from the base 24 and the width of the air outlet end 22 from the outer wall panel. The number of reinforcing ribs 25 can be set according to actual needs to achieve the purpose of firmly supporting the muffler elbow 20.

[0036] In this embodiment, the sound-absorbing structure on the muffler elbow 20 is a thermal insulation interlayer 26. The thermal insulation interlayer 26 is provided with a plurality of support plates 27 to provide a preset space for the thermal insulation interlayer 26. The preset space is used to place the sound-absorbing material. The thermal insulation interlayer 26 is arranged on the side wall of the entire muffler elbow 20. Furthermore, the thermal insulation interlayer 26 is supported and separated by the support plates 27 between the outer wall and the inner wall of the muffler elbow 20 to form a reserved space. The sound-absorbing material is arranged in the reserved space. The sound-absorbing material is sound-absorbing cotton or sound-insulating cotton. The thermal insulation interlayer 26 has good thermal insulation properties.

[0037] In this embodiment, a sloped structure 28 sloping downward is provided between the air inlet end 21 and the bottom of the muffler elbow 20. A drain device 29 is provided at the bottom of the muffler elbow 20 for draining wastewater. The downwardly sloping structure 28 between the air inlet end 21 and the elbow section allows cleaning fluid and oil generated during water washing of the gas turbine generator set to automatically flow into the drain device 29 at the bottom. The drain device 29 utilizes a conventional automatic drain trap equipped with an automatic drain valve that continuously drains wastewater to the exterior of the muffler elbow 20.

[0038] In this embodiment, see Figure 4 and Figure 5, several groups of the mufflers 31 form a matrix structure, and the mufflers 31 have the same spacing to make the internal flow field uniform. The muffler 31 is provided with a cone-shaped structure 32 at one end near the muffler elbow to reduce flow resistance and vibration caused by airflow impact. The matrix structure is a matrix structure of mufflers 31 such as 3×3, 4×4, or 5×5. The number of mufflers 31 can be set according to actual needs. The mufflers 31 are installed in the exhaust channel of the muffler in the vertical direction through connecting rods or support rods. The mufflers 31 have the same spacing to make the internal flow field uniform. Furthermore, insulation material 13 is provided on the outer wall of the muffler 31 and / or the inner wall plate of the exhaust muffler 30. The insulation material 13 is preferably rock wool with sound absorption and heat insulation functions, and other insulation materials 13 with the same effect can also be used. The high-temperature exhaust gas flows through the gaps in the matrix structure of the muffler 31, and at the same time, the muffler 31 and the muffler wall plate of the exhaust channel can absorb and attenuate noise. Furthermore, the muffler 31 is provided with a conical tip structure 32 at one end close to the muffler elbow, that is, the muffler 31 is provided with a conical tip structure 32 facing the muffler elbow 20 at the bottom, so that the airflow impact received by the high-temperature exhaust gas when entering the exhaust muffler 30 gradually increases from small to large, thereby reducing the flow resistance and vibration caused by the airflow impact.

[0039] The embodiment of the second aspect of the present invention provides a gas turbine generator set, the gas turbine generator set includes an exhaust system, and the exhaust system includes the exhaust silencer. The exhaust silencer consists of three sections, wherein the silencer elbow 20 and the exhaust silencer 30 both have the function of sound absorption and noise reduction; the exhaust flexible connection 10 adopts a metal flexible connection with low air resistance to avoid thermal displacement affecting the gas turbine casing; the silencer elbow 20 is internally welded with multiple sections of steel plates 23, with a smooth transition and low flow resistance, and an automatic sewage outlet is provided at the bottom; the silencer tubes 31 in the silencer are arranged in a matrix, with a symmetrical structure and uniform airflow, which is conducive to the stable operation of the entire device and avoids vibration caused by uneven airflow; the base 24 of the entire device can be fixed to the ground, the overall structure is stable, and the footprint is small.

[0040] The utility model can reduce the exhaust noise of the gas turbine, and at the same time absorb the thermal expansion and contraction effects caused by the high-temperature exhaust gas, so that the high-temperature exhaust gas can be discharged smoothly to the chimney; the entire device occupies a small area and can be applied to most gas turbine generator sets, solving the problem of limited space.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An exhaust muffler device, characterized in that: The exhaust muffler device comprises an exhaust flexible connection (1), a muffler elbow (20) and an exhaust muffler (30) connected in sequence, wherein the exhaust flexible connection (1) is used to be connected to the exhaust port of a gas turbine generator set, and the exhaust flexible connection (1) has a retractable structure (11) for absorbing thermal displacement; the muffler elbow (20) comprises an air inlet end (21) and an exhaust end (22), the air inlet end (21) is connected to the exhaust flexible connection (1), the exhaust end (22) is arranged in a vertical direction, and a muffler structure for noise reduction is arranged inside the muffler elbow (20); the exhaust muffler (30) is connected above the exhaust end (22) of the muffler elbow (20) in a vertical direction, and a plurality of muffler tubes (31) are arranged inside the exhaust muffler (30) along the airflow direction for absorbing and / or attenuating noise.

2. The exhaust muffler device according to claim 1, characterized in that: The retractable structure (11) of the exhaust flexible connection (1) is a bellows structure.

3. The exhaust muffler device according to claim 2, characterized in that: The exhaust flexible connection (1) further comprises an inner cylinder (14), which is arranged inside the bellows structure. The inner cylinder (14) is a smooth cylindrical structure with a taper, and is used to reduce air resistance in the flow channel.

4. The exhaust muffler device according to claim 3, characterized in that: The inner tube (14) is fixedly connected to the flange (15) at one end close to the exhaust port, and is suspended at one end away from the exhaust port, so that the inner tube (14) can freely expand and contract with the bellows structure to absorb thermal displacement.

5. The exhaust muffler device according to claim 1, characterized in that: The muffler elbow (20) comprises a plurality of steel plates (23) connected by welding, wherein the deflection angle between each two steel plates (23) is not greater than 20°, and the steel plates (23) expand step by step from the air inlet end (21) to the exhaust end (22) to form an elbow structure.

6. The exhaust muffler device according to claim 1, characterized in that: A base (24) is provided at the bottom of the muffler elbow (20), and a plurality of reinforcing ribs (25) for supporting the muffler elbow (20) are provided between the muffler elbow (20) and the base (24).

7. The exhaust muffler device according to claim 6, characterized in that: The muffler structure on the muffler elbow (20) is a heat-insulating interlayer (26), and the heat-insulating interlayer (26) is provided with a plurality of support plates (27) that provide the heat-insulating interlayer (26) with a preset space, and the preset space is used to place the muffler material.

8. The exhaust muffler device according to claim 1, characterized in that: A slope structure (28) inclined toward the bottom is provided between the air inlet end (21) of the muffler elbow (20) and the bottom of the muffler elbow (20), and a drain device (29) is provided at the bottom of the muffler elbow (20), and the drain device (29) is used to discharge sewage.

9. The exhaust muffler device according to claim 1, characterized in that: Several groups of mufflers form a matrix structure, and the mufflers (31) have the same spacing to make the internal flow field uniform. The muffler (31) is provided with a cone tip structure (32) at one end close to the muffler elbow (20) to reduce flow resistance and vibration caused by airflow impact.

10. A gas turbine generator set, characterized in that: The gas turbine generator set includes an exhaust system, and the exhaust system includes the exhaust silencer according to any one of claims 1 to 9.

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