WO2019131334A1 - Dispositif souffleur de suie et chaudière - Google Patents

Dispositif souffleur de suie et chaudière Download PDF

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Publication number
WO2019131334A1
WO2019131334A1 PCT/JP2018/046598 JP2018046598W WO2019131334A1 WO 2019131334 A1 WO2019131334 A1 WO 2019131334A1 JP 2018046598 W JP2018046598 W JP 2018046598W WO 2019131334 A1 WO2019131334 A1 WO 2019131334A1
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WO
WIPO (PCT)
Prior art keywords
heat transfer
blower
tube
bank
boiler
Prior art date
Application number
PCT/JP2018/046598
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English (en)
Japanese (ja)
Inventor
三紀 下郡
康裕 竹井
康 横山
須藤　誠
貴士 出井
智裕 松尾
杉山　友章
Original Assignee
三菱日立パワーシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱日立パワーシステムズ株式会社 filed Critical 三菱日立パワーシステムズ株式会社
Priority to KR1020207018863A priority Critical patent/KR102403110B1/ko
Publication of WO2019131334A1 publication Critical patent/WO2019131334A1/fr
Priority to PH12020500562A priority patent/PH12020500562A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/54—De-sludging or blow-down devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Definitions

  • the present invention relates to a sootblower apparatus for removing ash attached to a heat transfer tube and a boiler equipped with the sootblower apparatus.
  • Patent Documents 1 to 4 are known as a sootblower for removing solid ash particles, such as pulverized coal, from which solid fuel particles such as pulverized coal are burned.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2007-183069
  • the spray medium is sprayed from the large diameter spray port in the gap between the heat transfer tubes (8)
  • a spray medium is sprayed from the small diameter spray nozzle onto the tube surface (surface) of the heat transfer tube (8) to remove the ash of the heat transfer tube (8), and transfer it by ash erosion by the ash caught in the jet.
  • Techniques have been described to reduce the wear of the heat pipe (8).
  • the structure as which the bare tube in which the fin is not provided is used as a heat exchanger tube (8) is described.
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2001-132934
  • a furnace (100) of a boiler is constituted of a heat transfer tube group such as a superheater (54), an evaporator (55), and a coal saving device (56).
  • a heat transfer tube group such as a superheater (54), an evaporator (55), and a coal saving device (56).
  • a heat transfer tube group such as a superheater (54), an evaporator (55), and a coal saving device (56).
  • JP, 2007-183069, A ("0004"-"0008", FIG. 2, FIG. 4) JP-A-2001-132934 ("0002"-[0006], FIG. 7) JP 2002-115806 A Japanese Utility Model Application Publication No. 61-165302
  • a tube group panel including a bare tube called a bare tube and a fin tube having fins attached to the outer periphery of the bare tube (see Patent Documents 3 and 4) It consists of And the ash adhering to a tube group panel is removed by the soot blower.
  • the soot blower may be simply referred to as “SB”.
  • FIG. 6 is an explanatory view of a range where ash is removed by the soot blower.
  • SB rotates and reciprocates in the furnace while rotating
  • SB sprays steam (spray medium) while rotating the range in which ash is generally removed by SB is as shown in FIG.
  • the shape is concentric with the injection port 02 of the soot blower (SB) 01 as a center.
  • SB effective range The range from which the ash is removed by this SB01
  • the radius Rb of the concentric circle that becomes the SB effective range is referred to as "SB reach distance”.
  • the SB effective range is determined by the ease of ash and the strength of the jet. For example, the index of the ease of removing ash is taken as the sintering strength, and the strength of the jet against this is taken as the ash removing power. If the ash removal power by SB01 is large relative to the sintering strength of the deposited ash, the ash can be removed, and if small, the ash can not be removed, and the ash remains on the heat transfer tube 011.
  • FIG. 7 is an explanatory view of a jet flow injected by the soot blower.
  • the jet flow ejected from the nozzle toward the space spreads through the initial area including the core area, the development area, and the velocity distribution becomes flat in the width direction.
  • the jet diffused in the width direction collides with the surface of the heat transfer tube and spreads the tube surface in the horizontal direction (mainly in the direction of the tube axis). Ash is removed.
  • the dynamic pressure (Pt) generated by this horizontal velocity component corresponds to the removal force of SB.
  • Dynamic pressure Pt (ash removal power by SB) is determined by a plurality of parameters shown below.
  • the dynamic pressure Pt is stronger in the initial region and decreases as the jet spreads, but this degree is not only the condition on the SB side, but also the positional relationship between the SB and the heat transfer tube, the heat transfer tube diameter, and the tube pitch (the heat transfer tubes It also depends on the conditions of the heat transfer tube side such as interval).
  • the range in which the condition of Formula (2) is satisfied is the SB effective range of the radius Rb shown in FIG.
  • the ash removing power Pt also depends on the SB nozzle, a plurality of parameters on the heat transfer tube side, and the degree of sintering of the deposited ash. For example, when low-grade coal is used in a boiler, or the temperature of combustion gas is high and the sintering strength of ash is high, the conventional ash removal power Pt narrows the SB effective range and removes ash It becomes difficult.
  • FIG. 8 is an explanatory view of a problem of the conventional soot blower
  • FIG. 8 (A) is an explanatory view when the SB effective range is narrow
  • FIG. 8 (B) is an explanatory view when the SB effective range is wide.
  • FIG. 8A when the SB effective range 012 is narrow with respect to the heat transfer pipe 011, a region (a) in which the SB does not reach occurs, which causes a problem that ash tends to remain.
  • measures such as increasing the SB injection pressure Pj or increasing the number of SBs It will be necessary.
  • This invention makes it a technical subject to suppress abrasion of a heat exchanger tube, suppressing the fall of the efficiency which removes ash, when removing the whole ashes of a heat exchanger tube.
  • the horizontal heat transfer tubes having the horizontal axis as the tube axis are stacked in the vertical direction, and the stacked heat transfer tubes are arranged in multiple rows in the horizontal direction to form a bank formed inside the boiler
  • a soot blower device that sprays the spray medium from the upper surface side and the lower surface side of the bank to remove ash, and a plurality of blower nozzles that spray the spray medium inserted from the boiler wall face above and below the bank
  • the heat transfer tubes, which are installed so as to be movable in the horizontal direction, respectively, and which form the banks are finned heat transfer tubes having fins in a direction intersecting the tube axis, and the blower nozzle above the bank and the blower nozzle below the bank Are disposed so as to move in mutually displaced positions in a horizontal plane.
  • the invention according to claim 2 is the soot blower apparatus according to claim 1, wherein the moving direction of the plurality of blower nozzles is a direction intersecting with the direction of the tube axis of the heat transfer tube.
  • the invention according to claim 3 is the sootblower apparatus according to claim 1, wherein the moving directions of the plurality of blower nozzles are parallel to the axial direction of the heat transfer tube.
  • the invention according to claim 4 is directed to a plurality of banks formed by arranging a plurality of horizontal heat transfer tubes stacked in the vertical direction, the heat transfer tubes having the horizontal direction as the tube axis, and the banks facing each other.
  • It is a sootblower apparatus which sprays a spray medium from the upper surface side and lower surface side of a bank and removes ash, and a plurality of blower nozzles which spray the spray medium inserted from a boiler wall face are horizontal direction above the bank (blower nozzle And a heat transfer tube forming at least one of the plurality of banks, in a direction intersecting the tube axis).
  • a finned heat transfer tube provided with fins, wherein the blower nozzle above the bank and the blower nozzle below the bank are displaced from each other in the horizontal plane. Further comprising the placed sootblower device to a boiler characterized by.
  • the invention according to claim 5 is the boiler according to claim 4, characterized in that the moving directions of the plurality of blower nozzles are in a direction intersecting with the direction of the tube axis of the heat transfer tube.
  • the invention according to claim 6 is the boiler according to claim 4, characterized in that the moving directions of the plurality of blower nozzles are parallel to the axial direction of the heat transfer tube.
  • the invention according to claim 7 is characterized in that the blower nozzle on the upper surface side spaced apart along the tube axis direction and the blower nozzle on the upper surface side are disposed at an intermediate position between the blower nozzles on the upper surface side. It is a boiler according to claim 4, further comprising: a blower nozzle on the lower surface side.
  • the invention according to claim 8 is the boiler according to claim 4, characterized in that the heat transfer pipe and the soot blower apparatus disposed on the downstream side in the flow direction of the combustion gas are provided in the furnace.
  • the jet blown from the blower nozzle to the finned heat transfer pipe is restricted in spreading of the jet to the pipe axis as compared with the case without the fin, and the divided jet Is given directivity in the blowing direction. Therefore, the area with sufficient ash removal capacity expands in the spray direction. Therefore, even if the blower nozzle is not installed to face the both sides across the heat transfer tube, the blower nozzle disposed on one side across the heat transfer tube and the blower nozzle disposed on the other side across the heat transfer tube are By disposing at a position shifted with respect to the tube axis direction, it is possible to remove the entire ash of the heat transfer tube. Therefore, it is not necessary to increase the injection pressure of the jet while suppressing the decrease in the efficiency of removing the ash, and the wear of the heat transfer tube can be suppressed.
  • the blower nozzle on the lower surface side is disposed at an intermediate position between the blower nozzles on the upper surface side, so that the entire area of the heat transfer tube can be obtained. It is easy to cover evenly and it is easy to remove whole ash efficiently.
  • FIG. 1 is a schematic explanatory view of a boiler according to an embodiment of the present invention
  • FIG. 1 (A) is a general view
  • FIG. 1 (B) is a plan view
  • FIG. 2 is an explanatory view of the bank portion (heat exchanger) and the soot blower of the first embodiment
  • FIG. 3 is an explanatory view of the heat transfer tube of Example 1
  • FIG. 3 (A) is an explanatory view of a heat transfer tube formed of a bare tube
  • FIG. 3 (B) is an explanatory view of a heat transfer tube formed of a fin tube. It is.
  • FIG. 1 is a schematic explanatory view of a boiler according to an embodiment of the present invention
  • FIG. 1 (A) is a general view
  • FIG. 1 (B) is a plan view
  • FIG. 2 is an explanatory view of the bank portion (heat exchanger) and the soot blower of the first embodiment.
  • FIG. 3 is an explanatory view of the
  • FIG. 4 is an explanatory view of the arrangement of the soot blower, the configuration of the heat transfer tube and the range in which the ash removal is possible
  • FIG. 4 (A) is an explanatory view of the case where the heat transfer tube is bare and the soot blower is square arrangement
  • FIG. FIG. 4 is an explanatory view in the case where the heat transfer tubes are in a square arrangement with fin tubes
  • FIG. 4C is an explanatory view in the case where the heat transfer tubes are bare tubes and the soot blower is in a staggered arrangement.
  • FIG. 5 is an explanatory view of a modified example.
  • FIG. 6 is an explanatory view of a range where ash is removed by the soot blower.
  • FIG. 7 is an explanatory view of a jet flow injected by the soot blower.
  • FIG. 8 is an explanatory view of a problem of the conventional soot blower, and FIG. 8 (A) is an explanatory view when the SB effective range is narrow, and FIG. 8 (B) is an explanatory view when the SB effective range is wide.
  • FIG. 1 is a schematic explanatory view of a boiler according to an embodiment of the present invention
  • FIG. 1 (A) is a general view
  • FIG. 1 (B) is a plan view.
  • a boiler furnace may be expressed as a "can”.
  • the furnace 2 in the pulverized coal fired boiler 1 according to the first embodiment of the present invention, the furnace 2 has a water pipe portion 3 provided with a burner or the like (not shown).
  • the furnace 2 has a can front wall 2a, a can rear wall 2b, and side walls 2c and 2d.
  • Suspended heat transfer parts 4, 5 and 6 are arranged on the ceiling of the furnace 2 along the flow direction of the combustion gas burned by the burner, and a bank (heat transfer pipe) is disposed on the can rear wall 2b side. Groups, heat exchangers) 7, 8, 9, 10 are arranged.
  • FIG. 2 is an explanatory view of the bank portion (heat exchanger) and the soot blower of the first embodiment.
  • the banks 7 to 10 of the first embodiment extend along the longitudinal direction Yb (the direction toward the can front wall 2 a and the can rear wall 2 b, the tube axis direction) of the furnace 2 intersecting the flow direction Ya of the combustion gas. It is comprised by the heat exchanger tube 21 arrange
  • FIG. 3 is an explanatory view of the heat transfer tube of Example 1
  • FIG. 3 (A) is an explanatory view of a heat transfer tube formed of a bare tube
  • FIG. 3 (B) is an explanatory view of a heat transfer tube formed of a fin tube.
  • the heat transfer tubes 21 in the upstream suspended heat transfer sections (heat exchangers) 4 to 6 are configured by bare tubes (bare tubes) 22 as shown in FIG. 3A.
  • at least one bank of the heat exchangers 7 to 10 on the downstream side is constituted by a fin tube 23 in which a fin 23 b is supported on the outer surface of the tube main body 23 a.
  • the fins 23b are formed in a spiral shape in the tube axis direction Yb. Therefore, the fins 23 b are supported crossing (in the first embodiment, inclining) the tube axis direction Yb.
  • FIG. 1 An example of the SB arrangement is shown in FIG. 1.
  • a soot blower device 31 is arranged on the upstream side or downstream side of the flow direction Ya of the combustion gas.
  • the soot blower apparatus 31 has a blower nozzle 32 which extends along the width direction of the furnace 2 and is movable along the width direction of the furnace. Therefore, when removing the ash, the blower nozzle 32 moves (enters) while rotating from the side walls 2 c and 2 d toward the inside of the furnace 2 and then moves (exits) to the outside.
  • a plurality of soot blower devices 31a for the upstream suspended heat transfer portions (heat exchangers) 4 to 6 are arranged at intervals in the vertical direction.
  • the soot blower apparatus 31b for the banks (heat exchangers) 7 to 10 on the downstream side has a horizontal direction (can front wall 2a, can rear wall 2b) intersecting the tube axis direction Yb.
  • the blower nozzle 32b of the downstream soot blower device 31b burns the banks 7 to 10 and the blower nozzles 32b1 disposed on the upstream side (one side, the upper surface side) of the flow direction Ya of the combustion gas with respect to the banks 7 to 10.
  • the blower nozzle 32b2 disposed on the downstream side (the other side, the lower surface side) of the gas flow direction Ya is disposed at a position shifted with respect to the tube axial direction Yb.
  • the downstream blower nozzle 32b2 is disposed at an intermediate position between the upstream blower nozzles 32b1 in the axial direction Yb. Therefore, the downstream blower nozzles 32b2 are in a so-called staggered arrangement.
  • Example 1 In the pulverized coal burning boiler 1 of Example 1 having the above-described configuration, at least one bank of the banks 7 to 10 disposed on the can rear side (downstream side) is configured by the fin tube 23, and the corresponding soot blower device 31b The blower nozzles 32b are arranged in a staggered manner.
  • FIG. 3A when steam is sprayed onto the bare tube 22 from the soot blower device 31a, the jet (steam) that collides with the surface of the bare tube 22 has a tube axial direction Yb and a downstream direction (suspension direction of the jet). It spreads in the heat transfer part (the thickness direction of the heat exchangers 4 to 6).
  • FIG. 3A when steam is sprayed onto the bare tube 22 from the soot blower device 31a, the jet (steam) that collides with the surface of the bare tube 22 has a tube axial direction Yb and a downstream direction (suspension direction of the jet). It spreads in the
  • the jet flow blown from the sootblower device 31b to the fin tube 23 has directivity in the blowout direction (thickness direction of the banks (heat exchangers 7 to 10)) intersecting the pipe axial direction Yb. Is granted.
  • the SB standoff distance Ls (the distance from the SB injection port to the heat transfer tube 21 closest to the fin tube 23), the bank thickness Tb, and the SB nozzle pitch Xlp
  • Ls k1 ⁇ Tb formula (3)
  • Ls k2 ⁇ Xlp equation (4)
  • k1 is 0.10 ⁇ k1 ⁇ 1.83, and desirably 0.15 ⁇ k1 ⁇ 0.89.
  • k2 is in the range of 0.08 ⁇ k2 ⁇ 1.26, and desirably 0.13 ⁇ k2 ⁇ 1.04.
  • k1 when k1 is smaller than the lower limit, the distance from the blower nozzle 32b of the SB device 31b to the heat transfer pipe 21 (fin tube 23) is too short, and the energy of the jet becomes excessively high, and entrains the deposited ash. Ash erosion may occur.
  • k1 is larger than the upper limit, the distance between the blower nozzle 32b of the SB device 31b and the heat transfer tube 21 is long, the jet stream hardly reaches, and problems such as the ash removal can not be performed sufficiently occur.
  • k2 is smaller than the lower limit, it means that the distance from the blower nozzle 32b of the SB device 31b to the heat transfer tube 21 is too short or the distance between the blower nozzles 32b is too long.
  • the ash between the blower nozzles 32b tends to remain without being removed.
  • k2 is larger than the upper limit, it means that the distance between the blower nozzle 32b of the SB device 31b and the heat transfer tube 21 is too long or the distance between the blower nozzles 32b is too short.
  • jets from the adjacent blower nozzle 32b interfere with each other, resulting in overlapping and wasted waste, or SB effective ranges overlap and energy of the jets is excessively concentrated, resulting in deposited ash Cause problems such as causing ash erosion.
  • FIG. 4 is an explanatory view of the arrangement of the soot blower, the configuration of the heat transfer tube and the range in which the ash removal is possible
  • FIG. 4 (A) is an explanatory view of the case where the heat transfer tube is a bare tube and the blower nozzle is a square arrangement
  • FIG. 4 is an explanatory view in the case where the heat transfer tubes are in a fin tube and in a square arrangement
  • FIG. 4C is an explanatory view in the case where the heat transfer tubes are a bare tube and the blower nozzles are in a staggered arrangement.
  • the blower nozzles are squarely arranged using bare tubes, as shown in FIG.
  • the wear of the heat transfer tubes 21 can be suppressed while suppressing the decrease in the efficiency of removing ash without increasing the number of the soot blower apparatuses 31.
  • the waste of can also be reduced.
  • by making it possible to efficiently remove ash it is also possible to increase the mixed burning rate of low-grade coal such as sub-bituminous coal in the furnace 2, which also contributes to reduction in operation cost. Do.
  • FIG. 5 is an explanatory view of a modified example.
  • the blower nozzles 32b1 and 32b2 are disposed one by one on the side and disposed at a position deviated with respect to the tube axial direction Yb, so-called offset arrangement. With such a configuration, it is possible to obtain the same function and effect as those of the first embodiment.
  • the downstream blower nozzle 32b2 is disposed at an intermediate position between the upstream blower nozzles 32b1 in the axial direction Yb.
  • the present invention is not limited to this.
  • the position of the blower nozzle 32b2 can also be changed to a position suitable for ash removal, such as being arranged apart from the axial direction of the tube, or arranged so as to be packed.
  • the soot blower apparatus 31 exemplarily has a configuration movable in the direction intersecting with the tube axis direction, but is not limited thereto. For example, it is also possible to move along a (parallel) direction along the tube axis direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)

Abstract

L'invention concerne un dispositif souffleur de suie (31b) qui élimine les cendres en éjectant un produit de pulvérisation vers des bancs (7-10) dans lesquels des tubes de transfert de chaleur (21) orientés horizontalement sont empilés dans la direction verticale et une pluralité des tubes de transfert de chaleur (21) sont alignés dans la direction latérale. Le dispositif souffleur de suie (31) est caractérisé par les éléments suivants : des buses soufflantes (32) sont installées au-dessus et en-dessous des bancs (7-10) de façon à pouvoir se déplacer dans la direction horizontale ; les tubes de transfert de chaleur (21) sont des tubes de transfert de chaleur à ailettes (21) pourvus d'ailettes (23b) ; et une buse soufflante (32b1) au-dessus des bancs (7-10) ainsi qu'une buse de soufflante (32b2) en-dessous des bancs (7-10) sont disposées de façon à se déplacer à travers des positions qui s'écartent l'une de l'autre dans le plan horizontal. Lors de l'élimination des cendres de tous les tubes de transfert de chaleur, cette configuration permet de supprimer la diminution de l'efficacité d'élimination des cendres ainsi que l'usure des tubes de transfert de chaleur.
PCT/JP2018/046598 2017-12-25 2018-12-18 Dispositif souffleur de suie et chaudière WO2019131334A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020207018863A KR102403110B1 (ko) 2017-12-25 2018-12-18 수트 블로워 장치 및 보일러
PH12020500562A PH12020500562A1 (en) 2017-12-25 2020-06-23 Soot blower device and boiler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-247859 2017-12-25
JP2017247859A JP6814727B2 (ja) 2017-12-25 2017-12-25 ボイラ

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WO2019131334A1 true WO2019131334A1 (fr) 2019-07-04

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KR (1) KR102403110B1 (fr)
PH (1) PH12020500562A1 (fr)
WO (1) WO2019131334A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828853A (ja) * 1994-07-18 1996-02-02 Kawasaki Heavy Ind Ltd スートブロア装置
JP2000304238A (ja) * 1999-04-16 2000-11-02 Ishikawajima Harima Heavy Ind Co Ltd スートブロワ
JP2002317919A (ja) * 2001-04-19 2002-10-31 Kubota Corp 熱交換装置
JP2003014397A (ja) * 2001-06-27 2003-01-15 Babcock Hitachi Kk スートブロー装置
JP2008224185A (ja) * 2007-03-15 2008-09-25 Babcock Hitachi Kk スートブロワ装置およびそれを備えたボイラ装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61165302A (ja) 1985-01-17 1986-07-26 Nippon Kayaku Co Ltd 農園芸用粒剤の製造方法
JP2001132934A (ja) 1999-11-04 2001-05-18 Babcock Hitachi Kk ボイラのスートブロワ装置とその制御方法
JP2002115806A (ja) 2000-10-05 2002-04-19 Ishikawajima Harima Heavy Ind Co Ltd ボイラの節炭器構造
JP4906352B2 (ja) 2006-01-10 2012-03-28 バブコック日立株式会社 スートブロワ装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828853A (ja) * 1994-07-18 1996-02-02 Kawasaki Heavy Ind Ltd スートブロア装置
JP2000304238A (ja) * 1999-04-16 2000-11-02 Ishikawajima Harima Heavy Ind Co Ltd スートブロワ
JP2002317919A (ja) * 2001-04-19 2002-10-31 Kubota Corp 熱交換装置
JP2003014397A (ja) * 2001-06-27 2003-01-15 Babcock Hitachi Kk スートブロー装置
JP2008224185A (ja) * 2007-03-15 2008-09-25 Babcock Hitachi Kk スートブロワ装置およびそれを備えたボイラ装置

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PH12020500562A1 (en) 2021-05-17
JP2019113263A (ja) 2019-07-11
JP6814727B2 (ja) 2021-01-20
KR102403110B1 (ko) 2022-05-30
KR20200089746A (ko) 2020-07-27

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