KR102083471B1 - Silencer - Google Patents

Abstract

The muffler is started. The muffler according to the embodiment of the present invention is a muffler that reduces noise caused by exhaust gas by using a resonator, the noise main body being disposed on an exhaust gas discharge line through which the exhaust gas moves and having a resonator formed therein; A flame arrester disposed upstream of the noise main body; And an exhaust gas temperature reduction unit for reducing the temperature of the exhaust gas flowing into the noise main body.

Description

Silencer {Silencer}

The present invention relates to a silencer.

In general, when high-temperature and high-pressure exhaust gas discharged from an engine installed in a ship is released into the atmosphere as it is, explosion sounds are generated due to rapid expansion of the exhaust gas. At this time, the silencer is installed on the exhaust path of the exhaust gas for the purpose of preventing noise caused by the exhaust gas emitted from the engine of the ship.

Silencers are classified into active and passive types, and passive types are classified into resonance and sound absorption types. The resonance type is inexpensive, has no space constraints, and can be set to a frequency requiring noise control. Sound-absorbing type can control noise of wide band and is generally applied to ship because it is not affected by air characteristic change.

Recently, noise regulations have been tightened to provide a comfortable environment for sailors. In line with this trend, there is a need to develop a silencer that can effectively reduce noise.

Embodiment of the present invention is to provide a silencer that can effectively reduce the noise caused by the exhaust gas.

According to an aspect of the present invention, a silencer for reducing the noise by the exhaust gas using a resonator, the noise main body is disposed on the exhaust gas discharge line is moved, the resonator is formed therein; A flame arrester disposed upstream of the noise main body; And an exhaust gas temperature reduction unit for reducing the temperature of the exhaust gas introduced into the noise main body.

The exhaust gas temperature reduction unit may include: a fluid injection nozzle formed in the exhaust gas discharge line and injecting a fluid toward the exhaust gas flowing into the noise main body; And it may include a fluid storage tank for supplying the fluid to the fluid injection nozzle.

The fluid injection nozzle may be provided in plurality, and the plurality of fluid injection nozzles may be spaced apart from each other along a circumference of the exhaust gas discharge line.

The exhaust gas temperature reducing part surrounds a region in which the fluid spray nozzle is formed in the exhaust gas discharge line, accommodates the fluid supplied from the fluid storage tank, and has a receiving space formed therein for communicating with the fluid spray nozzle. The member may further include.

The exhaust gas temperature reduction portion may be disposed upstream of the flame arrester.

A recovery tray for recovering the fluid injected from the fluid injection nozzle may be formed inside the flame arrester.

The exhaust gas temperature reduction part may be disposed between the noise main body and the flame arrester.

A temperature measuring unit measuring a temperature of the exhaust gas moving through the exhaust gas discharge line; And a control unit controlling the exhaust gas temperature reduction unit so that the exhaust gas flowing into the noise main body has a design temperature of the resonator based on the temperature measurement value measured by the temperature measuring unit.

The controller may control the amount of the fluid injected by the fluid injection nozzle.

According to an embodiment of the present invention, by reducing the temperature of the exhaust gas flowing into the noise main body to reduce the size of the resonator, it is possible to manufacture a small size of the noise main body. Furthermore, the space utilization for the space where the silencer according to the present embodiment is installed can be improved.

1 is a view showing a silencer according to an embodiment of the present invention.
FIG. 2 is a view showing the AA line of FIG. 1 as viewed in the direction of an arrow. FIG.
FIG. 3 is a view showing the BB line of FIG. 1 as viewed in the direction of an arrow. FIG.
4 is a view showing a silencer according to another embodiment of the present invention.
5 is a view for explaining a part of the configuration of a silencer according to another embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the following description with reference to the accompanying drawings, the same or corresponding components will be given the same reference numerals and redundant description thereof will be omitted. do. In the following description, terms such as 'first' and 'second' are used to describe various components, and are not limited in themselves, and are used only for distinguishing one component from other components. .

1 is a view showing a silencer according to an embodiment of the present invention, Figure 2 is a view showing a state of the AA line of Figure 1 in the direction of the arrow, Figure 3 is a view of the BB line of Figure 1 in the direction of the arrow It is a figure which shows.

1 to 3, the silencer 100 according to an embodiment of the present invention includes a noise main body 110, a flame arrester 120, and an exhaust gas temperature reduction unit 130, and a resonator 111. ) To reduce noise caused by exhaust gases.

The exhaust gas may be generated at high temperature and high pressure at a noise source (not shown). For example, the noise source may be an engine of a ship, but is not limited thereto.

The exhaust gas may be discharged to the outside air through the exhaust gas discharge line 10 from the noise generating source. In other words, the exhaust gas discharge line 10 may provide a path for the exhaust gas to move to the outside air from the noise source.

The noise main body 110 is disposed on the exhaust gas discharge line 10.

For example, the exhaust gas discharge line 10 may extend in the vertical direction as shown in FIG. 1, and the noise main body 110 may extend along the extension direction of the exhaust gas discharge line 10.

In this case, the exhaust gas moving in the exhaust gas discharge line 10 may be introduced into the lower end of the noise main body 110 and discharged to the upper end of the noise main body 110. In this case, the lower end of the noise main body 110 is disposed toward an upstream side of the exhaust gas discharge line 10 as shown in FIG. 1, and the upper ends of the noise main bodies 110 and 210 are downstream of the exhaust gas discharge line 10. Can be placed towards.

The noise main body 110 may have a hollow shape. For example, the noise main body 110 may have a circular cross section, but is not limited thereto.

The resonator 111 is formed inside the noise main body 110.

For example, the resonator 111 may have a narrow jar shape in which the noise is introduced as shown in FIG. 1. In this case, the resonator 111 may be disposed in the interior of the noise main body 110 such that the inlet is directed toward the center of the noise main body 110.

The resonator 111 may be provided in plurality. The plurality of resonators 111 may be spaced apart from each other in the longitudinal direction of the noise main body 110 as shown in FIG.

Such a resonator 111 can reduce the noise caused by the exhaust gas by using the resonance. In other words, the resonator 111 may absorb sound by resonating air at a specific frequency, that is, a resonant frequency. In this case, the resonator 111 may effectively reduce the noise corresponding to the resonance frequency to be reduced among the noise caused by the exhaust gas passing through the noise main body 110.

The size of the resonator 111 may be determined according to the resonant frequency and the sound speed of the noise. In this case, the size of the resonator 111 may be determined according to the sound velocity of the noise when the resonant frequency is constant.

And the sound velocity of the noise can be determined according to the temperature of the exhaust gas. In other words, the speed of sound of noise increases when the temperature of the exhaust gas is increased, and may decrease when the temperature of the exhaust gas is lowered.

In this case, the size of the resonator 111 may be increased by increasing the speed of sound when the temperature of the exhaust gas is high when the resonance frequency is constant, and may be reduced by decreasing the speed of sound when the temperature of the exhaust gas is lowered.

On the other hand, the sound absorbing material 112 may be formed inside the noise main body 110. At this time, the sound absorbing material 112 may reduce the noise of the broadband frequency of the noise of the exhaust gas. In this case, the noise main body 110 can effectively reduce noise by the exhaust gas passing through the noise main body 110 by using the resonator 111 and the sound absorbing material 112 as a means for reducing the noise.

The flame arrester 120 is disposed upstream of the noise main body 110. In this case, the flame arrester 120 may prevent the flame and soot moving along with the exhaust gas flows into the noise main body 110. In this case, the flame arrester 120 can prevent the fire caused by the flame, it is possible to prevent the soot is discharged to the outside air to be contaminated.

For example, the flame arrester 120 may include a body 121 and a plurality of blades 122 as shown in FIGS. 1 and 2.

The body 121 is interposed between the exhaust gas discharge line 10 and the noise main body 110 as shown in FIG.

At this time, the exhaust gas may move to the noise main body 110 via the body 121. In other words, the exhaust gas moving in the exhaust gas discharge line 10 flows into the lower end of the body 121 and passes through the body 121 and is discharged to the upper end of the body 121 to the lower end of the noise main body 110. Can be introduced.

In this case, the lower end of the body 121 is disposed toward the upstream side of the exhaust gas discharge line 10 as shown in FIG. 1, and the upper end of the body 121 is disposed toward the downstream side of the exhaust gas discharge line 10. It may be connected to the lower end of the noise main body 110.

The body 121 may have a hollow shape. In this case, the body 121 may correspond to the cross-sectional shape of the noise main body 110. For example, when the noise main body 110 has a circular cross section, the body 121 may have a circular cross section.

The plurality of blades 122 may be disposed inside the body 121 as shown in FIGS. 1 and 2. In this case, the plurality of blades 122 may be fixedly coupled to the support member 123 extending in the longitudinal direction of the body 121 at the inner center of the body 121.

The plurality of blades 122 may be formed spirally, respectively. In this case, the exhaust gas introduced into the body 121 may pass through the body 121 while spirally moving by the plurality of blades 122 of the spiral.

In this case, the flame moving together with the exhaust gas may be absorbed and dispersed by the plurality of blades 122 to extinguish. And soot moving with the exhaust gas may be separated from the exhaust gas by the centrifugal force by the spiral motion may remain inside the body 121.

Accordingly, the exhaust gas may be introduced into the noise main body 110 by removing flame and soot from the flame arrester 120.

The exhaust gas temperature reduction unit 130 reduces the temperature of the exhaust gas flowing into the noise main body 110. At this time, the exhaust gas flowing into the noise main body 110 may have a lower temperature than when it is generated from the noise source.

In this regard, although not shown, the high temperature exhaust gas generated from the noise source is introduced into the conventional silencer. At this time, the size of the resonator formed in the conventional silencer is increased corresponding to the high-temperature exhaust gas. In this case, the silencer had to be made large in correspondence with the size of the resonator.

On the contrary, the exhaust gas whose temperature is reduced by the exhaust gas temperature reduction unit 130 may be introduced and passed through the noise main body 110 according to the present embodiment. In this case, the sound speed of the noise flowing into the noise main body 110 is reduced in response to the reduced temperature of the exhaust gas, and the sizes of the resonators 111 and 211 can be reduced in correspondence to the sound speed of the reduced noise.

Therefore, the silencer 100 according to the present embodiment may reduce the temperature of the exhaust gas flowing into the noise main body 110 to reduce the size of the resonator 111, thereby making it possible to reduce the size of the noise main body 110. Furthermore, the space utilization for the space in which the silencer 100 according to the present embodiment is installed may be improved.

In the present embodiment, the exhaust gas temperature reduction unit 130 may include a fluid injection nozzle 131 and a fluid storage tank 132, as shown in Figs. In this case, the exhaust gas temperature reduction unit 130 may reduce the temperature of the exhaust gas using a fluid.

In this case, the fluid may have a lower temperature than the exhaust gas.

For example, the fluid can be water. In addition, the fluid may be various materials capable of reducing the temperature of the exhaust gas, such as a low temperature gas such as liquid nitrogen.

The fluid injection nozzle 131 injects fluid toward the exhaust gas moving through the exhaust gas discharge line 10. At this time, the injected fluid can reduce the temperature of the exhaust gas.

The fluid injection nozzle 131 is formed in the exhaust gas discharge line 10. In this case, the fluid injection nozzle 131 may be disposed such that the injection hole faces the exhaust gas discharge line 10.

For example, the fluid spray nozzle 131 may extend through the side wall of the exhaust gas discharge line 10 as shown in FIGS. 1 and 3.

In addition, although not shown, the fluid spray nozzle may be formed in various structures capable of injecting fluid to the exhaust gas.

The fluid spray nozzle 131 may be provided in plural as shown in FIG. 3. In this case, the plurality of fluid spray nozzles 131 may be spaced apart from each other at equal intervals along the circumference of the exhaust gas discharge line 10. In this case, the plurality of fluid injection nozzles 131 may uniformly inject the fluid toward the exhaust gas discharge line 10, the exhaust gas temperature can be effectively reduced.

The fluid storage tank 132 supplies fluid to the fluid spray nozzle 131. In this case, the fluid storage tank 132 may supply the fluid stored therein to the fluid spray nozzle 131.

The fluid storage tank 132 may be connected to the fluid spray nozzle 131 and the fluid supply line 133.

The fluid supply pump 134 may be installed on the fluid supply line 133. In this case, the fluid stored in the fluid storage tank 132 may move toward the fluid injection nozzle 131 by the pumping operation of the fluid supply pump 134.

In the present embodiment, the fluid spray nozzle 131 may be connected to the fluid supply line 133 through the fluid receiving member 135 as shown in FIGS. 1 and 3.

The fluid receiving member 135 is formed to surround an area in which the fluid injection nozzle 131 is formed in the exhaust gas discharge line 10. In other words, the fluid receiving member 135 may be formed to surround the fluid injection nozzle 131 at the outside of the exhaust gas discharge line 10.

For example, the fluid receiving member 135 may be provided in the form of a hollow ring.

An interior of the fluid receiving member 135 is provided with a receiving space 135a for receiving the fluid. In this case, the fluid receiving member 135 may be connected to the fluid storage tank 132 through the fluid supply line 133. In this case, the fluid supplied from the fluid storage tank 132 may be accommodated in the accommodation space 135a.

The fluid accommodated in the accommodation space 135a may surround the outer surface of the exhaust gas discharge line 10 through which the high temperature exhaust gas moves. In this case, the exhaust gas discharge line 10 can be prevented from being raised by the fluid, and furthermore, it can be prevented from being damaged by the high temperature of the exhaust gas.

The accommodation space 135a may communicate with the fluid injection nozzle 131 as shown in FIG. 1. In this case, the fluid injection nozzle 131 may inject the fluid contained in the accommodation space 135a toward the exhaust gas.

In another embodiment, the fluid spray nozzle may be connected directly to the fluid supply line although not shown. In this case, the fluid injection nozzle may inject the fluid directly supplied from the fluid storage tank toward the exhaust gas.

On the other hand, although the exhaust gas temperature reduction unit is not shown, it may be provided in various structures that can reduce the temperature of the exhaust gas, such as a thermoelectric element is formed in the exhaust gas discharge line to absorb the heat of the exhaust gas.

The exhaust gas temperature reduction unit 130 may be disposed upstream of the noise main body 110. In this case, the exhaust gas temperature reduction unit 130 may reduce the temperature of the exhaust gas before the exhaust gas flows into the noise main body 110.

In the present embodiment, the exhaust gas temperature reduction unit 130 may be disposed upstream of the flame arrester 120 as shown in FIG. 1. At this time, the exhaust gas temperature reduction unit 130 may reduce the temperature of the exhaust gas flowing into the flame arrester 120. In this case, the exhaust gas is reduced in temperature by the exhaust gas temperature reduction unit 130 may be introduced into the flame arrester 120 and the noise main body 110 in order.

In this case, the fluid injected from the exhaust gas temperature reduction unit 130 may flow into the flame arrester 120 together with the exhaust gas moving at a high pressure. That is, the fluid injected from the exhaust gas temperature reduction unit 130 may flow into the body 121 of the flame arrester 120.

In this case, the fluid introduced into the body 121 may extinguish the flame moving along with the exhaust gas. In addition, the fluid introduced into the body 121 may spiral in the body 121 and may be separated from the exhaust gas and remain in the body 121 together with soot.

At this time, a recovery tray 140 for recovering the fluid injected from the fluid injection nozzle 131 may be formed in the flame arrester 120.

For example, the recovery tray 140 may be formed in the lower portion of the body 121 of the flame arrester 120 as shown in FIG. In this case, the fluid introduced into the body 121 may be recovered to the recovery tray 140 by its own weight along with the soot.

The recovery tray 140 may be connected to the fluid discharge line 141 extending to the outside of the body 121. In this case, the fluid and soot recovered by the recovery tray 140 may be easily discharged to the outside of the flame arrester 120, that is, the body 121 through the fluid discharge line 141. Furthermore, the soot is discharged together with the fluid, thereby saving work on maintenance to the flame arrester 120.

On the other hand, the fluid discharge line 141 may be connected to the fluid storage tank 132 of the exhaust gas reducing portion as shown in FIG. In this case, the fluid injected from the fluid injection nozzle 131 may be recycled.

In this case, a filter unit 150 may be formed in the fluid discharge line 141. The filter unit 150 may remove the soot discharged with the fluid from the flame arrester 120. In this case, the filtered fluid is recovered to the fluid storage tank 132, and when the recovered fluid is recycled, malfunction of the fluid supply pump 134 or the fluid injection nozzle 131 by soot or the like may be prevented.

On the other hand, although the exhaust gas temperature reduction part is not shown, it may be disposed between the noise main body and the flame arrester. In this case, the exhaust gas temperature reduction part passes through the flame arrester and can reduce the temperature of the exhaust gas from which the flame and the soot are removed.

For example, the fluid spray nozzle may be disposed between the noise main body and the flame arrester.

As described above, the silencer 100 according to the embodiment of the present invention reduces the temperature of the exhaust gas flowing into the noise main body 110 to reduce the size of the resonator 111, thereby reducing the size of the noise main body 110. It can be made small. Furthermore, the space utilization for the space in which the silencer 100 according to the present embodiment is installed may be improved.

4 is a view showing a silencer according to another embodiment of the present invention, Figure 5 is a view for explaining a part of the configuration of a silencer according to another embodiment of the present invention.

4 and 5, the silencer 200 according to another embodiment of the present invention includes a noise main body 210, a flame arrester 220, a fluid spray nozzle 231, and a fluid storage tank 232. The exhaust gas temperature reduction unit 230, the temperature measuring unit 260 and the control unit 270, and using the resonator 211 can reduce the noise caused by the exhaust gas.

The noise main body 210, the flame arrester 220, and the exhaust gas temperature reduction unit 230 according to the present embodiment are the noise main body (110 of FIG. 1), the flame arrester (120 of FIG. 1), and the exhaust of the previous embodiment. It is substantially the same as the gas temperature reduction part 130 (FIG. 1), and the detailed description is abbreviate | omitted.

The silencer 200 according to the present embodiment is different from the previous embodiment in that it further includes a temperature measuring unit 260 and a control unit 270. Hereinafter, in explaining the present embodiment will be described a difference from the previous embodiment.

The temperature measuring unit 260 measures the temperature of the exhaust gas moving through the exhaust gas discharge line 10. In this case, the temperature measuring unit 260 may be various known measuring means capable of measuring the temperature of the exhaust gas such as a thermocouple, and a detailed description thereof will be omitted.

The temperature measuring unit 260 may be disposed upstream of the exhaust gas temperature reducing unit 230 as shown in FIG. 4. In this case, the temperature measuring unit 260 may measure the temperature of the exhaust gas moving to the exhaust gas temperature reducing unit 230.

For example, the temperature measuring unit 260 may be disposed inside the exhaust gas discharge line 10 on the upstream side of the fluid injection nozzle 231 as shown in FIG. 4.

The control unit 270 of the exhaust gas temperature reduction unit 230 so that the exhaust gas flowing into the noise main body 210 has a design temperature of the resonator 211 based on the temperature measurement value measured by the temperature measuring unit 260. To control operation.

In this regard, the temperature of the exhaust gas generated from the noise source and moving the exhaust gas discharge line 10 may be changed by various causes such as the operating state of the engine according to the season or the cargo ship situation of the ship. In this case, a temperature range in which the temperature of the exhaust gas is changed may be obtained through a plurality of measurements, model experiments, or numerical analysis of the exhaust gas moving through the exhaust gas discharge line 10.

For example, the exhaust gas can vary in a temperature range between 300 degrees Celsius and 400 degrees Celsius.

The resonator 211 may be manufactured to remove noise corresponding to the resonance frequency at a design temperature lower than the lowest temperature of the exhaust gas temperature range. In this case, the resonator 211 may be manufactured in a small size. Here, the design temperature refers to a temperature for determining the sound velocity of the noise corresponding to the resonance frequency.

For example, the design temperature may be 250 degrees Celsius.

At this time, the exhaust gas temperature reduction unit 230 assumes that the exhaust gas moving through the exhaust gas discharge line 10 has a reference temperature which is a temperature arbitrarily selected from the temperature range of the exhaust gas, and the exhaust gas moves to the reference temperature. It can be set to the initial state to reduce to the design temperature.

For example, it is assumed that the reference temperature is 350 degrees Celsius, and the initial state of the fluid injection nozzle 231 may be set to inject a fluid that reduces the exhaust gas temperature from the reference temperature of 350 degrees Celsius to the design temperature of 250 degrees Celsius. have.

In the process of reducing the noise by installing the noise main body 210 on the exhaust gas discharge line 10, the temperature measuring unit 260 may measure the temperature of the exhaust gas moving through the exhaust gas discharge line 10. . The controller 270 may receive the temperature measurement value measured by the temperature measurement unit, and compare the temperature measurement value with the reference temperature.

In this case, the temperature measurement value measured by the temperature measuring unit 260 may be different from the reference temperature. If the exhaust gas temperature reduction unit 230 continues to operate in an initial state corresponding to the reference temperature, the temperature of the exhaust gas flowing into the noise main body 210 may be difficult to satisfy the design temperature, and the resonator 211 may operate. It may be difficult to reduce the noise corresponding to the resonance frequency.

In this case, the controller 270 may control the exhaust gas temperature reduction unit 230 so that the exhaust gas flowing into the noise main body 210 has a design temperature according to the difference between the temperature measurement value and the reference temperature.

For example, the controller 270 may adjust the amount of fluid injected from the fluid injection nozzles 131 and 231. In other words, the controller 270 may increase or decrease the amount of fluid injected from the fluid injection nozzle 231 according to the difference between the temperature measurement value and the reference temperature.

In more detail, the temperature measurement may be higher than the reference temperature. At this time, the control unit 270 may increase the amount of fluid injected from the fluid injection nozzle 231 than the initial state. In this case, the temperature of the exhaust gas flowing into the noise main body 210 can be quickly reduced to the design temperature.

Alternatively, the temperature measurement may be lower than the reference temperature. At this time, the controller 270 may reduce the amount of fluid injected from the fluid injection nozzle 231 than the initial state. In this case, the temperature of the exhaust gas flowing into the noise main body 210 can be prevented from being lowered below the design temperature.

Alternatively, the temperature measurement may be equal to the reference temperature. At this time, the controller 270 may maintain the amount of fluid injected from the fluid injection nozzle 231 in a constant state, that is, the initial state.

Therefore, the silencer 200 according to the present embodiment can effectively reduce the temperature of the exhaust gas to the design temperature when the temperature of the exhaust gas is changed. Furthermore, the noise corresponding to the resonance frequency can be effectively reduced.

As described above, embodiments of the present invention have been described, but those skilled in the art may add, change, delete, or add elements within the scope not departing from the spirit of the present invention described in the claims. The present invention may be modified and changed in various ways, etc., which will also be included within the scope of the present invention.

10: exhaust gas discharge line
100, 200: Silencer
110, 210: Noise base
111, 211: Resonators
120, 220: flame arrester
121: body
122: blade
123: support member
130, 230: exhaust gas temperature reduction unit
131, 231: fluid spray nozzle
132, 232: fluid storage tank
133: fluid supply line
134: fluid supply pump
135: fluid receiving member
140: recovery tray
150: filter unit
260: temperature measuring unit
270: control unit

Claims (9)

A silencer that reduces noise caused by exhaust gas by using a resonator,
A noise main body disposed on an exhaust gas discharge line through which the exhaust gas moves, and having a resonator formed therein;
A flame arrester disposed upstream of the noise main body; And
An exhaust gas temperature reduction unit for reducing the temperature of the exhaust gas flowing into the noise main body,
The sound velocity of the noise caused by the exhaust gas flowing into the noise main body is reduced in correspondence with the temperature of the exhaust gas reduced by the exhaust gas temperature reduction unit,
The size of the resonator is produced in response to the reduced sound speed of the noise by the exhaust gas. The method of claim 1,
The exhaust gas temperature reduction unit,
A fluid injection nozzle formed in the exhaust gas discharge line and injecting a fluid toward the exhaust gas flowing into the noise main body; And
And a fluid storage tank for supplying the fluid to the fluid injection nozzle. The method of claim 2,
The fluid spray nozzles are provided in plurality, and the plurality of fluid spray nozzles are disposed spaced apart from each other along the circumference of the exhaust gas discharge line. The method of claim 2,
The exhaust gas temperature reduction unit,
The silencer further includes a fluid receiving member surrounding an area in which the fluid injection nozzle is formed in the exhaust gas discharge line, receiving the fluid supplied from the fluid storage tank, and a receiving space communicating with the fluid injection nozzle. . The method of claim 2,
And the exhaust gas temperature reducing portion is disposed upstream of the flame arrester. The method of claim 5,
The silencer is formed inside the flame arrester, the recovery tray for recovering the fluid injected from the fluid injection nozzle. The method of claim 2,
And the exhaust gas temperature reduction part is disposed between the noise main body and the flame arrester. The method of claim 2,
A temperature measuring unit measuring a temperature of the exhaust gas moving through the exhaust gas discharge line; And
And a control unit for controlling the exhaust gas temperature reduction unit so that the exhaust gas flowing into the noise main body has a design temperature of the resonator based on the temperature measurement value measured by the temperature measuring unit. The method of claim 8,
And the control unit controls the amount of the fluid sprayed by the fluid injection nozzle.

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