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WO2013015088A1 - Chaudière tour - Google Patents

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Publication number
WO2013015088A1
WO2013015088A1 PCT/JP2012/067118 JP2012067118W WO2013015088A1 WO 2013015088 A1 WO2013015088 A1 WO 2013015088A1 JP 2012067118 W JP2012067118 W JP 2012067118W WO 2013015088 A1 WO2013015088 A1 WO 2013015088A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat transfer
furnace wall
superheater
boiler
combustion gas
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/067118
Other languages
English (en)
Japanese (ja)
Inventor
勇太 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to JP2013525645A priority Critical patent/JP5692385B2/ja
Priority to EP12817946.2A priority patent/EP2735790B1/fr
Publication of WO2013015088A1 publication Critical patent/WO2013015088A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
    • F22G7/06—Steam superheaters characterised by location, arrangement, or disposition in furnace tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/40—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes arranged in a comparatively long vertical shaft, i.e. tower boilers
    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G1/00—Steam superheating characterised by heating method
    • F22G1/02—Steam superheating characterised by heating method with heat supply by hot flue gases from the furnace of the steam boiler

Definitions

  • the present invention relates to a tower boiler. This application claims priority based on Japanese Patent Application No. 2011-160529 for which it applied to Japan on July 22, 2011, and uses the content here.
  • a tower boiler is a boiler suitable for being installed in a limited space.
  • a tower boiler disclosed in Patent Document 1.
  • This tower boiler performs heat exchange between a boiler body, a burner that injects and burns fuel into the boiler body, and a combustion gas that is generated by injecting and burning fuel from the burner into the boiler body. And a heat transfer section.
  • the superheater which comprises a heat-transfer part, the resuperheater, and the economizer is arrange
  • a heat transfer section for example, a superheater, includes long heat transfer tubes that are bundled by reciprocating multiple times, and if the adjacent pitch of the heat transfer tubes in the bundled state (interval between adjacent heat transfer tubes) is large, the superheater The volume of increases. Since the size of the superheater directly affects the size of the boiler, in the conventional tower boiler, superheaters (heat transfer portions) having a narrowest adjacent pitch as much as possible are arranged.
  • the tower boiler disclosed in Patent Document 1 described above is a tower boiler capable of generating steam under high steam conditions (high temperature and high pressure conditions) for the purpose of improving plant efficiency
  • the amount of fuel input is increased by improving plant efficiency.
  • the flow rate of steam supplied from the tower boiler to the turbine is further reduced. That is, since the feed water flow rate is reduced, as a result, the temperature of water or steam flowing in the furnace wall tube is higher than that of a tower boiler under conventional steam conditions.
  • the heat recovery amount by a feed water heater may be increased for the purpose of further improving plant efficiency. In this case, the temperature of the feed water introduced into the boiler is increased, and the temperature of water or steam flowing in the furnace wall pipe is further increased.
  • the present invention has been made paying attention to the above-described conventional problems, and can generate steam under high steam conditions aimed at improving plant efficiency without using a material that can withstand high-temperature steam on the furnace wall.
  • the purpose is to provide a tower boiler that can be used.
  • a first aspect according to the present invention includes a furnace wall that forms a boiler body and exchanges heat with combustion gas generated in the boiler body, and is located in an upper portion of the boiler body and is disposed in the boiler body.
  • the heat transfer section includes a plurality of superheaters, and is located at least on the furnace wall lower side of the plurality of superheaters.
  • the adjacent pitch of the heat transfer tubes in the superheater is set wider than the adjacent pitch of the heat transfer tubes in the superheater located on the side away from the furnace wall lower part.
  • each adjacent pitch of the heat transfer tubes in the plurality of superheaters is set for each superheater as the distance from the furnace wall lower part increases. It is narrowed sequentially.
  • the adjacent pitch of the heat transfer tubes in the plurality of superheaters is the superheater with the narrowest adjacent pitch of the heat transfer tubes.
  • the temperature of the combustion gas is reduced to the melting point of the ash until the combustion gas containing ash is introduced into the superheater having a narrow adjacent pitch of the heat transfer tubes located on the side away from the furnace wall lower part. It needs to be lowered below. Therefore, the superheater located closest to the furnace wall lower side, that is, the superheater having a wide adjacent pitch of the heat transfer tubes, also serves as a heat transfer surface for lowering the temperature of the soot combustion gas. Therefore, the amount of heat absorbed by the furnace wall in which a large number of furnace wall tubes in the lower part of the furnace wall are arranged in the vertical direction is relatively reduced, and the in-pipe steam temperature at the upper part of the furnace wall can be kept low.
  • a combustion gas having a gas temperature exceeding the melting point of ash is introduced into the superheater located closest to the furnace wall lower side. Therefore, if the adjacent pitch of the heat transfer tubes in this superheater is set narrow, there is a concern about blockage of the superheater due to ash adhering to the heat transfer tubes. On the other hand, if the adjacent pitch of the heat transfer tubes in the superheater is set wide, the necessity of increasing the boiler size arises.
  • the adjacent pitch of the heat transfer tubes in the superheater located closest to the furnace wall lower side is set to a value that can prevent blockage by ash and avoid an increase in boiler size. For example, when the combustion gas of about 1600 ° C. generated by the combustion is lowered to about 1200 ° C. or less, which is the melting point of ash, before being introduced into the superheater located on the side away from the lower part of the furnace wall, It is desirable to set the adjacent pitch of 1000 to 2000 mm. At this time, the adjacent pitch of the heat transfer tubes in the superheater located on the side away from the lower part of the furnace wall is approximately 600 to 700 mm.
  • the above-described configuration improves the plant efficiency without using a material that can withstand high-temperature steam for the furnace wall, that is, without changing the material of the furnace wall that is currently employed. It is possible to operate under the target high steam conditions.
  • FIG. 1 shows an embodiment of a tower boiler according to the present invention.
  • the tower boiler 1 includes a furnace wall 3 that forms a boiler body 2, a burner 4 that injects fuel into the boiler body 2, and burns from the burner 4 into the boiler body 2.
  • a heat transfer section that exchanges heat with the combustion gas G generated by injecting and burning the fuel. Heat exchange with the combustion gas G is also performed by the furnace wall lower part 3 a and the furnace wall upper part 3 b located at the lower part and the upper part of the boiler body 2.
  • the heat transfer section is disposed in the upper flow path 10 surrounded by the furnace wall upper part 3b of the boiler body 2, and this heat transfer section includes a plurality of superheaters 5 to 8, a reheater 9, and a charcoal saving (not shown). With a bowl.
  • the combustion gas G is supplied to the heat transfer section in the upper flow path 10, that is, the superheaters 7, 6, 8, the reheater 9, the superheater 5, and the economizer to heat the combustion gas G.
  • a flue gas treatment device such as a denitration catalyst and a desulfurization device (not shown) arranged further downstream, components such as sulfur compounds and nitrogen compounds are removed, Release into the atmosphere.
  • the superheater 7 that is located closest to the furnace wall lower part 3a and is exposed to the flame F, and the heat transfer tubes 11 that constitute the superheater 6 that is located downstream of the superheater 7 are It is bundled by reciprocating several times. Furthermore, as shown in the enlarged portion of FIG. 1, the adjacent pitch Pw of the heat transfer tubes 11 constituting these superheaters 6 and 7 is the heat transfer constituting the superheater 8 located on the side away from the furnace wall lower portion 3a. It is set wider than the pitch Pn of the heat tubes 11.
  • the combustion gas G is introduced into the superheater 8 positioned on the side away from the furnace wall lower portion 3a, that is, the superheater 8 having a narrow adjacent pitch Pn of the heat transfer tubes 11.
  • the superheater 7 that is located closest to the furnace wall lower part 3a and is exposed to the flame F and the superheater 6 adjacent thereto, that is, the superheaters 6 and 7 that widen the adjacent pitch Pw of the heat transfer tubes 11 are combusted. It also serves as a heat transfer surface that lowers the temperature of the gas G.
  • the amount of heat absorbed by the furnace wall lower part 3a in which a large number of furnace wall pipes (not shown) are arranged in the vertical direction is reduced, and the steam temperature in the furnace wall upper part 3b of the boiler body 2 is kept low.
  • the steam temperature in the furnace wall pipe in the furnace wall upper portion 3b of the boiler body 2 can be kept low. Therefore, a material that can withstand high-temperature steam, for example, a 7CrMOVTiB10-10 material called T24 is not used for the furnace wall upper portion 3b, that is, a currently used furnace wall material, for example, a 13CrMO4-5 material called T12 is used. It can be used to operate under high steam conditions aimed at improving plant efficiency.
  • a 7CrMOVTiB10-10 material called T24 is not used for the furnace wall upper portion 3b, that is, a currently used furnace wall material, for example, a 13CrMO4-5 material called T12 is used. It can be used to operate under high steam conditions aimed at improving plant efficiency.
  • FIG. 2 shows another embodiment of the tower boiler according to the present invention.
  • the tower boiler 21 according to this embodiment is different from the tower boiler 1 according to the previous embodiment in that it is located closest to the furnace wall lower part 3a among the plurality of superheaters 5 to 8.
  • the other configurations are the same as those of the tower boiler 1 according to the previous embodiment.
  • the adjacent pitches Pw, Pm, and Pn of the heat transfer tubes 11 from the superheater 7 layered closest to the furnace wall lower part 3a to the superheater 8 located farthest away from the furnace wall lower part 3a If it is made to narrow sequentially with this, in each superheater 7,6,8, after blocking
  • the configuration of the tower boiler according to the present invention is not limited to the configuration of the tower boiler according to the above-described embodiment.
  • the adjacent pitch of the heat transfer tubes 11 may be changed in the superheater 6 adjacent to the superheater 7 layered most in the vicinity of the furnace wall lower part 3a.
  • the adjacent pitches Pw, Pm, Pn of the heat transfer tubes 11 from the superheater 7 layered closest to the furnace wall lower part 3a to the superheater 8 located farthest are gradually increased as the distance from the furnace wall lower part 3a increases. You may change so that it may narrow.
  • This tower boiler can be operated under high steam conditions with the aim of improving plant efficiency without changing the currently used furnace wall material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)

Abstract

L'invention concerne une chaudière tour (1) comprenant une paroi de foyer (3) destinée à former une unité principale de chaudière (2) et à réaliser un échange de chaleur avec un gaz de combustion (G) produit à l'intérieur de l'unité principale de chaudière (2), et une unité de transfert de chaleur positionnée au-dessus de l'unité principale de chaudière (2) et utilisée pour réaliser un échange de chaleur avec le gaz de combustion (G) produit à l'intérieur de l'unité principale de chaudière (2). L'unité de transfert de chaleur comprend une pluralité de surchauffeurs (6 à 8), et le pas de position (Pw) des tubes de transfert de chaleur au moins dans les surchauffeurs (6, 7), parmi les surchauffeurs (6 à 8), qui sont positionnés sur le côté le plus proche de la partie inférieure (3a) de la paroi du four est défini plus grand que le pas de position (Pn) des tubes de transfert de chaleur (11) situés dans le surchauffeur (8) positionné sur le côté placé à distance de la partie inférieure (3a) de la paroi du four.
PCT/JP2012/067118 2011-07-22 2012-07-04 Chaudière tour Ceased WO2013015088A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2013525645A JP5692385B2 (ja) 2011-07-22 2012-07-04 タワーボイラ
EP12817946.2A EP2735790B1 (fr) 2011-07-22 2012-07-04 Chaudière tour

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-160529 2011-07-22
JP2011160529 2011-07-22

Publications (1)

Publication Number Publication Date
WO2013015088A1 true WO2013015088A1 (fr) 2013-01-31

Family

ID=47600943

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/067118 Ceased WO2013015088A1 (fr) 2011-07-22 2012-07-04 Chaudière tour

Country Status (3)

Country Link
EP (1) EP2735790B1 (fr)
JP (1) JP5692385B2 (fr)
WO (1) WO2013015088A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112555807A (zh) * 2019-09-10 2021-03-26 上海动银科技有限公司 一种应用于高温超高压无再热系统的生物质层燃锅炉的水平过热器安装装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63243603A (ja) * 1987-03-30 1988-10-11 バブコツク日立株式会社 伝熱管群間移動装置
JPH09243004A (ja) 1996-03-06 1997-09-16 Ishikawajima Harima Heavy Ind Co Ltd タワーボイラ
JP2008304178A (ja) * 2007-05-09 2008-12-18 Hitachi Ltd 石炭焚きボイラ及び石炭焚きボイラの燃焼方法
JP2010525219A (ja) * 2007-04-27 2010-07-22 ▲偉▼忠 ▲馮▼ 新型のタービン発電機ユニット

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB497208A (en) * 1937-07-21 1938-12-14 Fried Krupp Germaniawerft Ag Improvements in or relating to water tube boilers
GB524052A (en) * 1938-01-21 1940-07-29 Babcock & Wilcox Ltd Improvements in or relating to water tube boilers with superheaters
GB546763A (en) * 1941-03-28 1942-07-29 Babcock & Wilcox Ltd Improvements in tubulous boilers
DE2114897A1 (de) * 1971-03-27 1972-10-12 Babcock & Wilcox Ag Anordnung quer angeströmter Heiz rohrbündel in dampfbeheizten Zwischen Überhitzern
DE2144847A1 (de) * 1971-09-03 1973-03-15 Kawasaki Heavy Ind Ltd Heizflaeche eines abgaskessels fuer metallfrischoefen
JPH02178502A (ja) * 1988-12-29 1990-07-11 Hirakawa Tekkosho:Kk 水管群を有するボイラ
JP2001227883A (ja) * 2000-02-17 2001-08-24 Babcock Hitachi Kk 熱交換器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63243603A (ja) * 1987-03-30 1988-10-11 バブコツク日立株式会社 伝熱管群間移動装置
JPH09243004A (ja) 1996-03-06 1997-09-16 Ishikawajima Harima Heavy Ind Co Ltd タワーボイラ
JP2010525219A (ja) * 2007-04-27 2010-07-22 ▲偉▼忠 ▲馮▼ 新型のタービン発電機ユニット
JP2008304178A (ja) * 2007-05-09 2008-12-18 Hitachi Ltd 石炭焚きボイラ及び石炭焚きボイラの燃焼方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112555807A (zh) * 2019-09-10 2021-03-26 上海动银科技有限公司 一种应用于高温超高压无再热系统的生物质层燃锅炉的水平过热器安装装置

Also Published As

Publication number Publication date
JP5692385B2 (ja) 2015-04-01
EP2735790A1 (fr) 2014-05-28
EP2735790B1 (fr) 2021-01-13
EP2735790A4 (fr) 2015-04-15
JPWO2013015088A1 (ja) 2015-02-23

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