JP2011069519A - Silencer of combustor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a silencer of a combustor whih effectively reduces noise in a limited space, and is easily assembled. <P>SOLUTION: In this silencer 6 of the combustor 1 reducing noise of an exhaust gas by allowing the exhaust gas generated in the combustor 1 to pass in an exhaust passage, the silencer 6 includes a casing 16 composed of a square outer frame 14 opened at its top face, and a cover body 15 covering the top face of the outer frame 14 and having an exhaust gas inlet 17 and an exhaust gas outlet 18, and an inner frame sound absorbing material 19 in contact with the inner wall of the outer frame 14, and having a roughly-rectangular parallelepiped space 25 inside. Further, in the roughly-rectangular parallelepiped space 25, an exhaust passage for communicating with the exhaust gas inlet 17 and the exhaust gas outlet 18 is formed by a plurality of sound absorbing materials 31, 32, 37, and a plurality of partition plates 26, 29, 30, 35, 36, 39 having a space in which the exhaust gas passes, and the meandering exhaust passage is formed by successively stacking the partitioning plates 26, 29, 30, 35, 36, 39 and the sound absorbing materials 31, 32, 37 like blocks. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a silencer for a combustor such as an oil water heater.

  Conventionally, in a combustor A such as an oil water heater, as shown in FIG. 7, a primary heat exchange unit 101 constituting a heat exchanger that recovers sensible heat in exhaust gas and a heat source that generates a downward flame , A blower 103 that supplies air to the combustion unit 102, a collective exhaust unit 104 that is disposed below the heat exchange unit 101 and communicates with the heat exchanger 101, and communicates with the collective exhaust unit 104 to absorb sound internally. A silencer 105 having a material, and a secondary heat exchange unit 106 that constitutes a heat exchanger that condenses water vapor in the exhaust gas that is disposed above the silencer 105 and passes through the silencer 105 and recovers the latent heat thereof. The exhaust gas 107 is provided with a discharge port 107 for discharging the exhaust gas to the outside, and the exhaust gas generated by combustion passes downward through the primary heat exchange unit 101 and is U-turned upward from the downward direction in the collective exhaust unit 104. , Reduced noise associated with exhaust gas discharge in the process of passing through the sound device 105 was intended to be discharged from the discharge port 107 passes through the secondary heat exchanger unit 106 to the outside (see Patent Document 1).

JP 2006-207902 A

  However, when the secondary heat exchanging unit 106 that recovers the latent heat in the exhaust gas is provided as in the prior art, there is a problem that the combustor A main body is enlarged correspondingly. In order to solve this, it has been considered that the secondary heat exchanger tube portion 106 is arranged instead of the silencer 105 at the position where the silencer 105 is originally arranged.

  However, if the secondary heat exchanger tube portion 106 is disposed instead of the silencer 105 at the position where the silencer 105 is originally disposed, an increase in the size of the combustor A main body can be avoided, but an exhaust path through which the exhaust gas passes. Since the noise reduction device 105 is eliminated and the noise reduction effect is diminished, there is a problem that combustion noise cannot be reduced.

  Then, the next conceivable is to place a horizontal silencer 105 instead of the collective exhaust unit 104 at the position where the collective exhaust unit 104 was originally arranged. Here, it is generally known that the silencing effect of the silencer improves as the exhaust path is lengthened, and noise is reduced. However, if the exhaust path is lengthened, the structure tends to be complicated. there were.

  Accordingly, an object of the present invention is to provide a silencer for a combustor that can effectively reduce noise in a limited space and is easy to assemble.

  In order to solve the above-described problems, the present invention provides a noise reduction device for a combustor that reduces exhaust gas noise by passing exhaust gas generated in a combustor through an exhaust passage. A casing made of a rectangular outer frame having an upper surface opening, a cover body covering the upper surface of the outer frame and having an exhaust gas inlet and an exhaust gas outlet, and a substantially rectangular parallelepiped space in contact with the inner wall of the outer frame An inner frame sound-absorbing material, and further communicated with the exhaust gas inlet and the exhaust gas outlet by a plurality of sound-absorbing materials and a plurality of partition plates through which exhaust gas passes inside the substantially rectangular parallelepiped space. The exhaust path is formed, and is arranged so as to abut the lower end of the outlet partition plate so that one end of the outlet partition plate communicates with the exhaust gas outlet directly below the exhaust gas outlet and extends in the vertical direction. With outlet divider A lower partition plate extending in the horizontal direction, an inversion lower partition plate that is arranged so as to abut the lower portion against the other end of the lower partition plate and communicates with the lower partition plate to reverse the traveling direction of the exhaust gas, A middle-stage sound-absorbing material placed on the lower-stage partition plate, a rise-up sound-absorbing material placed on the lower-stage partition plate and provided between the middle-stage sound-absorbing material and the outlet partition plate, and placed on the middle-stage sound-absorbing material A middle stage partition plate placed on the upper part of the inverted lower partition plate so as to abut one end thereof and extending in the horizontal direction in communication with the inverted lower partition plate; and the middle stage placed on the middle stage sound absorbing material An inversion upper partition that is disposed between the partition plate and the upright sound absorbing material and communicates with the middle partition plate so as to reverse the traveling direction of the exhaust gas so that the lower portion abuts against the other end side of the middle partition plate. A plate, and a top placed on the inverted lower partition plate and the middle partition plate The sound absorbing material is placed on the upper sound absorbing material and disposed so that one end thereof abuts on the upper part of the reversing upper partition plate, and the exhaust gas inlet and the reversing upper partition plate are communicated to extend in the horizontal direction. An upper stage partition plate is provided, and each partition plate and each sound-absorbing material are sequentially stacked like a building block so as to form the exhaust passage.

  Further, according to claim 2, each of the lower partition plate and the middle partition plate is provided with a flange portion covering the end surface of the middle sound absorbing material on the inverted lower partition plate side on the periphery of the inverted lower partition plate side, and The flange part which covers the end surface by the side of the said reversing upper partition plate of an upper stage sound-absorbing material shall each be provided in the peripheral edge by the side of the said reversing upper partition plate of the middle stage partition plate and the said upper stage partition plate.

  Moreover, in Claim 3, the said lower stage partition plate, the said middle stage partition plate, and the said upper stage partition plate are comprised with the porous steel plate which has many small holes, The said exit partition plate, the said reverse lower partition plate, and the said reverse upper partition plate The plate was composed of a steel plate without a small hole.

  According to the first aspect of the present invention, since the exhaust path can be formed simply by sequentially stacking the partition plates and the sound absorbing materials in the form of blocks, the assembly is extremely simple and the exhaust path through which the exhaust gas passes is meandered. By using the exhaust path, the exhaust path becomes longer, and noise accompanying exhaust gas discharge can be effectively reduced. Further, each partition plate has a space through which the exhaust gas passes, so that a certain size of the exhaust path can be secured.

  According to the second aspect of the present invention, the lateral positions of the middle sound absorbing material and the upper sound absorbing material can be fixed by the respective flange portions, and the end surfaces of the sound absorbing materials of the middle sound absorbing material and the upper sound absorbing material are covered. As a result, it is possible to prevent the end face of the sound absorbing material from bulging due to long-term use, and to prevent the exhaust passage from being blocked.

  According to claim 3, the lower partition plate, the middle partition plate, and the upper partition plate are formed of a perforated steel plate having a large number of small holes, so that noise accompanying exhaust gas discharge can be reduced from the small holes. Passing through and actively absorbing sound, the outlet partition plate, the inverted lower partition plate, and the inverted upper partition plate are made of steel plates that do not have small holes, so that noise is reflected and guided from the small holes to the sound absorbing material. In this way, noise can be reliably reduced.

The schematic block diagram of the combustor of one Embodiment of this invention. The external view of the silencer of the same embodiment. The disassembled perspective view of the silencer of the same embodiment. The top view of the silencer of the same embodiment. AA sectional drawing of FIG. The principal part enlarged view of FIG. The schematic block diagram of the conventional combustor.

  Next, a combustor according to an embodiment of the present invention will be described with reference to FIG.

  DESCRIPTION OF SYMBOLS 1 is the reverse combustion type combustor of this embodiment, 2 is a combustion burner which is a combustion part as a heat source which uses petroleum as fuel and generates a flame downward, 3 is a blower which supplies the combustion burner 2 with combustion air, 4 is a combustion chamber provided below the combustion burner 2, and 5 is a fin tube type heat exchanger provided in the combustion chamber 4 for recovering sensible heat of exhaust gas generated by combustion of the combustion burner 2. Primary heat exchange section.

  6 is a silencer disposed on the downstream side of the combustion chamber 4, one end of which communicates with the bottom of the combustion chamber 4 and reduces noise associated with exhaust gas discharge generated in the combustor 1. The other end of the silencer 6 is It communicates with the secondary heat exchange section 7 formed of a stainless steel box through the exhaust duct 8, and the secondary heat exchange section 7 condenses the water vapor in the exhaust gas that has passed through the silencer 6, It consists of a heat exchanger that recovers the latent heat. Reference numeral 9 denotes an exhaust port for exhausting the exhaust gas that has passed through the secondary heat exchanging unit 7 out of the combustor 1.

  Here, the exhaust gas generated with the combustion of the combustion burner 2 flows downward through the combustion chamber 4 by the blowing force of the blower 3 and passes through the primary heat exchange unit 5. Then, the exhaust gas that has passed downward through the primary heat exchange unit 5 is U-turned upward from the downward direction by the silencer 6 and flows upward into the secondary heat exchange unit 7 via the exhaust duct 8 to generate secondary heat. After passing through the exchanging part 7, it is discharged from the discharge port 9.

  Reference numeral 10 denotes a neutralizer provided at the lower part of the secondary heat exchange unit 7. The neutralizer 10 is filled with a neutralizing agent (not shown) made of calcium carbonate. The strongly acidic drain water generated by recovering the latent heat from the water is collected and neutralized through the drain communication passage 11, and the pH is lowered and drained out of the combustor 1.

  12 is a water supply pipe, 13 is a hot water supply pipe that supplies hot water to a hot water tap (not shown) outside the appliance of the combustor 1, and water supply from the water supply pipe 12 is first performed by heat exchange in the secondary heat exchange section 7. The heat is exchanged with the exhaust gas in the heat exchanger of the secondary heat exchange unit 7 and is then introduced into the heat exchanger of the primary heat exchange unit 5 and the heat of the primary heat exchange unit 5 In the exchanger, heat is exchanged with the hot exhaust gas, and the hot water is discharged from the hot water tap through the hot water supply pipe 13 at the hot water temperature set by the user.

  Next, the silencer 6 of the present invention will be described with reference to FIGS. FIG. 2 is an external view showing the external appearance of the silencer 6. FIG. 3 is an exploded perspective view showing the internal configuration of the silencer 6. FIG. 4 is a top view of the silencer 6 viewed from above. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 6 is an enlarged view of a main part of FIG.

  The silencer 6 will be described. First, 14 is a rectangular outer frame made of stainless steel and the upper surface is opened, and 15 is a stainless steel lid that covers the upper surface of the outer frame 14. Thus, the casing 16 of the silencer 6 is formed. Further, the lid body 15 serves as an exhaust gas inlet 17 serving as an opening for allowing the exhaust gas that has passed through the combustion chamber 4 to flow into the silencer 6, and for exhausting the exhaust gas that has passed through the silencer 6 to the exhaust duct 8. And an exhaust gas outlet 18 as an opening surface.

  Reference numeral 19 denotes an inner frame sound-absorbing material that is attached so as to be in contact with all the inner wall surfaces of the outer frame 14 and has an upper surface opened. The inner frame sound-absorbing material 19 is a bottom surface sound-absorbing material that contacts the bottom surface side of the inner wall surface of the outer frame 14. Material 20, front sound absorbing material 21 in contact with the front side of the inner wall surface of outer frame 14, rear sound absorbing material 22 in contact with the rear side of the inner wall surface of outer frame 14, and outer frame 14 provided on the exhaust gas inlet 17 side. The left side sound-absorbing material 23 abutting on the left side of the inner wall surface and the right side sound-absorbing material 24 abutting on the right side of the inner wall surface of the outer frame 14 provided on the exhaust gas outlet 18 side. 20, a front sound-absorbing material 21, a back-surface sound-absorbing material 22, a left-side sound-absorbing material 23, and a right-side sound-absorbing material 24 have a substantially rectangular parallelepiped space 25.

  An exhaust passage communicating with the exhaust gas inlet 17 and the exhaust gas outlet 18 is formed inside the substantially rectangular parallelepiped space 25 by a plurality of sound absorbing materials to be described later and a plurality of partition plates having a space H through which the exhaust gas passes. The substantially rectangular parallelepiped space 25 is filled with a plurality of sound absorbing materials and a plurality of partition plates without any gaps.

  Inside the substantially rectangular parallelepiped space 25, on the bottom surface sound absorbing material 20, just below the exhaust gas outlet 18, abuts against the inner wall surfaces of the back surface sound absorbing material 22 and the right side sound absorbing material 24, and the height is on the right side surface. The sound absorbing material 24 has substantially the same height as the bottom, the bottom is closed, the top is provided with an opening communicating with the exhaust gas outlet 18, and the opening formed at the bottom of one side is made to flow in, and the space is formed inside the space. An outlet partition plate 26 extending in the vertical direction having H, and arranged next to the outlet partition plate 26 so as to be sandwiched between the outlet partition plate 26 and the front sound absorbing material 21, and the height is equal to the height of the outlet partition plate 26. The outlet sound absorbing material 27 having substantially the same size and the width are substantially the same as the width of the outlet partition plate 26 and the outlet sound absorbing material 27 combined, and an opening communicating with the lower opening of the outlet partition plate 26 at one end. An opening through which exhaust gas flows into the other end and the other A lower-stage partition plate 29 having a lower-stage flange portion 28 protruding upward from the upper peripheral edge of the opening and extending in the horizontal direction having the space H therein, and the width is substantially the same as the width of the lower-stage partition plate 29. , Disposed so as to be sandwiched between the left-side sound absorbing material 23 and the lower partition plate 29, and having one opening for communicating the opening at the other end of the outlet partition plate 26 and allowing the exhaust gas to flow in. A reverse lower partition plate 30 having the space H for reversing the traveling direction of the exhaust gas is placed inside.

  On the lower partition plate 29, the width is substantially the same as the width of the lower partition plate 29, and the middle sound absorbing material 31 extending in the horizontal direction, the outlet partition plate 26, the outlet sound absorbing material 27, and the middle sound absorbing material. The standing sound absorbing material 32 is disposed so as to be sandwiched between the material 31 and has a width that is substantially the same as the width of the middle sound absorbing material 31 and extends in the vertical direction to substantially the same position as the upper surface of the outlet partition plate 26. Are placed.

  Further, the width of the middle stage sound absorbing material 31 is substantially the same as the width of the middle stage sound absorbing material 31, has a height substantially the same as the top surface of the inverted lower partition plate 30, and the inverted lower partition plate at one end. 30 and an intermediate lower flange portion 33 projecting downward from the lower peripheral edge of the opening at one end, and an upper opening from which the exhaust gas flows into the other end and the upper peripheral edge of the other end opening. And a middle stage partition plate 35 extending in the horizontal direction having the space H inside, and having a width substantially the same as the width of the middle stage sound absorbing material 31, and a standing sound absorbing material. 32 has a height substantially the same as the upper surface of 32, is disposed so as to be sandwiched between the rising sound absorbing material 32 and the middle partition plate 35, communicates with the opening at the other end of the middle partition plate 35, and exhaust gas And an opening surface for inflowing, a reverse L-shape in cross-sectional view and a U-shape in vertical cross-section In, in which the upper reverse the partition plate 36 of the pan-shaped with the space H to reverse the traveling direction of the internal exhaust gas is placed. The reversing upper partition plate 36 is provided with a cut-and-raised piece that comes into contact with the upper surfaces of the front sound absorbing material 21, the back sound absorbing material 22, and the rising sound absorbing material 32 and is screwed together with the lid 15. .

  On the inverted lower partition plate 30 and the middle partition plate 35, the width is the same as the inverted lower partition plate 30 and the middle partition plate 35, and the lengths of the inverted lower partition plate 30 and the middle partition plate 35 are combined. An upper sound absorbing material 37 having the same dimensions as the length is placed. On the upper sound absorbing material 37, the width and length are substantially the same as the width and length of the upper sound absorbing material 37, and the upper surface of the left side sound absorbing material 23. Alternatively, it has a height substantially the same as the upper surface of the upright sound absorbing material 32 and is disposed so as to be sandwiched between the left side sound absorbing material 23 and the inverted upper partition plate 36, and has an opening of the inverted upper partition plate 36 at one end. An opening surface communicating with the surface and an upper flange portion 38 projecting downward from the lower peripheral edge of the one end, and the space H communicating with the exhaust gas inlet 17 is L-shaped in cross-sectional view and U-shaped in cross-sectional view. A receiving tray-like upper partition plate 39 is placed. The upper partition plate 39 is provided with cut-and-raised pieces that come into contact with the upper surfaces of the front sound-absorbing material 21, the back-surface sound-absorbing material 22, and the left-side sound-absorbing material 23 and are screwed together with the lid 15.

  The partition plates 26, 29, 30, 35, 36, 39 described above are connected to each other and the spaces H of the partition plates 26, 29, 30, 35, 36, 39 are connected to each other, thereby flowing from the exhaust gas inlet 17. Thus, an exhaust path for allowing the exhaust gas to flow out to the exhaust gas outlet 18, that is, a meandering exhaust path as shown in FIG. 5 can be formed.

  In addition, each sound-absorbing material 20, 21, 22, 23, 24, 27, 31, 32, and 37 can easily change the heat absorption and the specific gravity of rock wool, which has excellent heat resistance, and can easily adjust the sound absorption efficiency. It is composed of ceramic wool or glass wool that is superior in cost. Moreover, each partition plate 26, 29, 30, 35, 36, 39 consists of a stainless steel plate excellent in heat resistance and corrosion resistance, and each partition plate 29, 35, 39 is punching metal which has many small holes 40. The partition plates 26, 30, and 36 are each made of a steel plate that does not have the small holes 40. A part of the partition plates is made of a porous steel plate, and noise accompanying exhaust gas discharge is reduced by the small holes 40. The sound absorbing material is passed through to actively absorb sound, and the other partition plate is made of steel, and the noise that has passed through the sound absorbing material is reflected from the small holes 40 to be guided to the sound absorbing material again, or the noise is reflected and newly added. By guiding the sound absorbing material from the small hole 40, noise can be reliably reduced.

Next, a method for assembling the silencer 6 will be described.
First, an inner frame sound absorbing material 19 composed of a bottom sound absorbing material 20, a front sound absorbing material 21, a back sound absorbing material 22, a left side sound absorbing material 23, and a right side sound absorbing material 24 is installed in the outer frame 14. Then, an outlet partition plate 26 and an outlet sound absorbing material 27 are installed at a position in contact with the inner wall surface of the right side sound absorbing material 24 of the substantially rectangular parallelepiped space 25, and from there toward the left side sound absorbing material 23, A lower partition plate 29 is installed so that one end of the outlet partition plate 26 and the outlet sound absorbing material 27 is abutted against the lower end of the outlet partition plate 26 and an inverted lower partition plate 30 is installed so that the lower end is abutted against the other end of the lower partition plate 29. By doing so, the outlet partition plate 26, the outlet sound absorbing material 27, the lower stage partition plate 29, and the inverted lower partition plate 30 are disposed so as to abut against each other and the inner frame sound absorbing material 19, and do not shift from front to back and from side to side. Each position is fixed .

  Subsequently, the middle-stage sound absorbing material 31 is placed on the lower-stage partition plate 29, and is installed so that the end surface of the middle-stage sound-absorbing material 31 on the inverted lower partition plate 30 side abuts the lower-stage flange portion 28 of the lower-stage partition plate 29. Then, the rising sound absorbing material 32 is placed on the lower partition plate 29 and installed between the outlet partition plate 26 and the middle sound absorbing material 31, so that the middle sound absorbing material 31 and the rising sound absorbing material 32 are disposed at the outlet partition plate. 26 and the lower flange portion 28, and disposed so as to abut against the front sound absorbing material 21 and the back sound absorbing material 22 of the inner frame sound absorbing material 19. Is.

  Next, the middle stage partition plate 35 is placed on the middle stage sound-absorbing material 31, and the middle stage partition plate 35 is installed so that one end of the middle stage partition plate 35 is abutted with the upper part of the lower turn partition plate 30. As shown in FIG. A middle lower flange portion 33 is hooked between the lower partition plate 30 and the lower flange portion 28, and a part of the middle lower flange portion 33 is superposed on the lower flange portion 28 of the lower partition plate 29. The end surface of the middle-stage sound absorbing material 31 on the inverted lower partition plate 30 side is covered so as not to be exposed.

  Then, the upper sound absorbing material 37 is placed on the inverted lower partition plate 30 and the middle partition plate 35, and the upper sound absorbing material 37 includes the front upper sound absorbing material 21 and the rear sound absorbing material among the middle upper flange portion 34 and the inner frame sound absorbing material 19. The position is fixed without being shifted forward, backward, left and right by being sandwiched between the material 22 and the left side sound absorbing material 23. Subsequently, the inverted upper partition plate 36 is placed on the middle sound absorbing material 31, and the inverted upper partition plate 36 An inversion upper partition plate 36 is installed between the rising sound absorbing material 32 and the middle partition plate 35 while the lower portion is abutted against the middle upper flange portion 34 side of the middle partition plate 35, and then the upper sound absorbing material 37. The upper partition plate 39 is placed on the upper upper partition plate 36 so that one end of the upper partition plate 39 is abutted on the upper portion of the upper reversal partition plate 36. As shown in FIG. An upper flange portion 38 between the upper partition plate 39 and the flange portion 34. Hook, a portion of the upper flange portion 38 is arranged to be polymerized in the middle on the flange portion 34 of the middle partition plate 35, the end face of the upper sound absorbing material 37 of the upper reverse the partition plate 36 side is intended to cover so as not to be exposed. At this time, the middle partition plate 35, the reversing upper partition plate 36, and the upper partition plate 39 are disposed so as to abut against each other and the inner frame sound absorbing material 19, and the positions thereof are fixed without being displaced from front to back and left and right. Is.

  As described above, when the partition plates 26, 29, 30, 35, 36, 39 and the sound absorbing materials 27, 31, 32, 37 are sequentially stacked in the form of blocks, the exhaust gas inlet 17 and the exhaust gas outlet 18 A meandering exhaust passage communicating with each other can be formed, and the members interact with each other, so that each partition plate 26, 29, 30, 35, 36, 39 and each sound absorbing material 27 are formed in a substantially rectangular parallelepiped space 25. , 31, 32, 37 can be firmly fixed and positioned.

  Finally, the silencer 6 is secured by screwing the lid 15 so that the cut and raised pieces of the upper partition plate 39 and the inverted upper partition plate 36 are sandwiched between the inner frame sound absorbing material 19 and the lid 15. Are assembled.

  In the silencer 6 of the combustor 1 described above, the inner frame sound absorbing material 19 is installed in the outer frame 14, and the partition plates 26, 29, 30, and the like are disposed in a substantially rectangular parallelepiped space 25 inside the inner frame sound absorbing material 19. 35, 36, 39 and each sound absorbing material 27, 31, 32, 37 can be formed by simply stacking them sequentially in a building block, so that an exhaust passage communicating with the exhaust gas inlet 17 and the exhaust gas outlet 18 can be formed. In addition, since the exhaust passage through which the exhaust gas passes is a meandering exhaust passage, the exhaust passage becomes longer, and noise accompanying exhaust gas discharge can be effectively reduced. Moreover, since each partition plate 26, 29, 30, 35, 36, 39 has a space H through which the exhaust gas passes, it is possible to ensure a reliable exhaust path width.

  Further, by providing the lower flange portion 28 and the middle lower flange portion 33, it is possible to fix the lateral position of the middle noise absorbing material 31, and to superpose a part of the middle lower flange portion 33 on the lower flange portion 28. Since the end surface of the middle-stage sound absorbing material 31 is covered so as not to be exposed, the end surface of the middle-stage sound absorbing material 31 is prevented from bulging out due to long-term use, and the exhaust passage is blocked. It is something that can be done.

  Further, by providing the middle upper flange portion 34 and the upper flange portion 38, the lateral position of the upper sound absorbing material 37 can be fixed, and a part of the upper flange portion 38 is superposed on the middle upper flange portion 34. Since the end surface of the upper sound absorbing material 37 is covered so that the end surface of the upper sound absorbing material 37 is not exposed, the end surface of the upper sound absorbing material 37 is prevented from bulging out due to long-term use, and the exhaust passage is blocked. It is something that can be done.

6 Silencer 14 Outer frame 15 Lid 16 Casing 17 Exhaust gas inlet 18 Exhaust gas outlet 19 Inner frame sound absorbing material 25 Space 26 having a substantially rectangular parallelepiped shape Exit partition plate 28 Lower flange portion (flange portion)
29 Lower partition plate 30 Reverse lower partition plate 31 Middle sound absorbing material 32 Upright sound absorbing material 33 Middle lower flange portion (flange portion)
34 Middle upper flange (flange)
35 Middle partition plate 36 Reverse upper partition plate 37 Upper sound absorbing material 38 Upper flange portion 39 Upper partition plate 40 Small hole

Claims (3)

  In a silencer for a combustor that reduces exhaust gas noise by passing exhaust gas generated in a combustor through an exhaust passage, the silencer includes a rectangular outer frame having an upper surface opening and an upper surface of the outer frame. A casing having a cover exhaust gas inlet and a cover having an exhaust gas outlet; and an inner frame sound absorbing material in contact with the inner wall of the outer frame and having a substantially rectangular parallelepiped space on the inner side; and the substantially rectangular parallelepiped space The exhaust path communicating with the exhaust gas inlet and the exhaust gas outlet is formed by a plurality of sound absorbing materials and a plurality of partition plates having a space for allowing exhaust gas to pass through the interior. An outlet partition plate that communicates with the exhaust gas outlet and extends in the vertical direction; a lower partition plate that communicates with the outlet partition plate and extends in the horizontal direction so as to abut one end of the outlet partition plate at a lower portion of the outlet partition plate; , Lower partition An inversion lower partition plate that communicates with the lower partition plate and reverses the traveling direction of the exhaust gas, and a middle sound absorbing material placed on the lower partition plate, An upright sound absorbing material placed on the lower partition plate and provided between the middle sound absorbing material and the outlet partition plate, and one end of the upper sound absorbing material placed on the middle sound absorbing material so as to abut against the upper portion of the inverted lower partition plate An intermediate stage partition plate that communicates with the inverted lower partition plate and extends in the horizontal direction, and is placed between the intermediate stage partition plate and the upright sound absorbing material placed on the intermediate stage sound absorbing material, A reversing upper partition plate that communicates with the middle partition plate so as to abut against the other end side of the middle partition plate and reverses the traveling direction of exhaust gas, and is mounted on the inverted lower partition plate and the middle partition plate. Placed on the upper sound-absorbing material and placed on the upper sound-absorbing material. An upper partition plate that is arranged so that one end of the plate abuts against the upper portion of the plate and the exhaust gas inlet and the inversion upper partition plate communicate with each other and extends in the horizontal direction. A muffler for a combustor, characterized in that the exhaust passage meandering in a stacked manner is formed.   A flange portion is provided on each of the lower partition plate and the middle partition plate on the reversing lower partition plate side to cover the end surface of the middle sound absorbing material on the reversing lower partition plate side, and the middle partition plate and the upper partition plate. 2. The silencer for a combustor according to claim 1, wherein a flange portion that covers an end surface of the upper sound absorbing material on the reverse upper partition plate side is provided on a peripheral edge of the plate on the reverse upper partition plate side.   The lower partition plate, the middle partition plate, and the upper partition plate are made of perforated steel plates having many small holes, and the outlet partition plate, the inverted lower partition plate, and the inverted upper partition plate have small holes. The muffler for a combustor according to claim 2, wherein the muffler is composed of a steel plate that is not used.

Images