EP2206952B1 - Reheat boiler and gas temperature control method of reheat boiler - Google Patents

Reheat boiler and gas temperature control method of reheat boiler Download PDF

Info

Publication number
EP2206952B1
EP2206952B1 EP08765283.0A EP08765283A EP2206952B1 EP 2206952 B1 EP2206952 B1 EP 2206952B1 EP 08765283 A EP08765283 A EP 08765283A EP 2206952 B1 EP2206952 B1 EP 2206952B1
Authority
EP
European Patent Office
Prior art keywords
reheat
combustion air
furnace
boiler
combustion
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.)
Not-in-force
Application number
EP08765283.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2206952A1 (en
EP2206952A4 (en
Inventor
Junji Imada
Isao Uchida
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP2206952A1 publication Critical patent/EP2206952A1/en
Publication of EP2206952A4 publication Critical patent/EP2206952A4/en
Application granted granted Critical
Publication of EP2206952B1 publication Critical patent/EP2206952B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/02—Disposition of air supply not passing through burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K15/00—Adaptations of plants for special use
    • F01K15/02—Adaptations of plants for special use for driving vehicles, e.g. locomotives
    • F01K15/04—Adaptations of plants for special use for driving vehicles, e.g. locomotives the vehicles being waterborne vessels
    • 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
    • F22B21/002—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically involving a single upper drum
    • 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
    • F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
    • F22B21/04—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely
    • F22B21/08—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends
    • F22B21/081—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends involving a combustion chamber, placed at the side and built-up from water tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G1/00—Steam superheating characterised by heating method
    • F22G1/16—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
    • F22G7/12—Steam superheaters characterised by location, arrangement, or disposition in flues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/042—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with fuel supply in stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire

Definitions

  • the present invention relates to a reheat boiler including a reheat furnace and a reheater provided downstream of an evaporation tube bank and reducing temperature unevenness of combustion gas near an outlet of the reheat furnace and to a gas temperature controlling method of such a reheat boiler.
  • Marine boilers including a super heater have been widely used ( JP 2002-243106A ). Furthermore, reheat boilers including a reheat furnace and a reheater provided downstream of combustion gas in conventional marine boilers have been used.
  • FIG. 6 is a schematic of a configuration of the conventional reheat boiler.
  • this conventional reheat boiler 100 includes: a main boiler 106 including a burner 101, a furnace 102, a front tube bank 103, a super heater (SH) 104, and an evaporation tube bank (rear tube bank) 105; a reheat furnace 108 including a reheat burner 107 provided downstream of the evaporation tube bank 105; and a reheater 109 provided at a combustion gas outlet side.
  • a main boiler 106 including a burner 101, a furnace 102, a front tube bank 103, a super heater (SH) 104, and an evaporation tube bank (rear tube bank) 105
  • a reheat furnace 108 including a reheat burner 107 provided downstream of the evaporation tube bank 105
  • a reheater 109 provided at a combustion gas outlet side.
  • the combustion gas originating from combustion in the burner 101 flows from the furnace 102, passes through the front tube bank 103, the SH 104, and the evaporation tube bank 105, and is mixed with the combustion gas originating from combustion in the reheat burner 107 in the reheat furnace 108. With its heat exchanged with the reheater 109, the gas further flows, and is output from a gas outlet 110.
  • the reheat boiler is thus operated efficiently.
  • the numeral 111 indicates a water drum
  • the numeral 112 indicates a steam drum
  • the numerals 113, 114 indicate headers
  • the numeral 115 indicates a wall tube.
  • US 3956898 A discloses a reheat boiler arranged for operation in a marine reheat power plant and it includes a main boiler, a reheat furnace, and a reheater provided on an upper side of the reheat furnace.
  • a supplemental reheat burner and an air supply for the burners is provided on the same side of the reheat furnace.
  • the conventional marine reheat boiler 100 includes the reheat burner 107 on a front wall side of the reheat furnace 108, but not on a rear wall side of the reheat furnace 108. Because of this configuration, as illustrated in Fig. 7 , large temperature unevenness of the combustion gas arises between the front wall side (indicated by the letter X in Fig. 7 ) and the rear wall side (indicated by the letter Y in Fig. 7 ) of the reheat furnace 108 on the outlet side thereof (indicated by the letter B in Fig. 6 ).
  • Temperature unevenness of the combustion gas on the outlet side of the reheat furnace 108 (that is, on the inlet side of the reheater 109) deteriorates heat conductivity of the reheat furnace 108 and the reheater 109, and may also cause high-temperature corrosion of reheater tubes and strength drops of support members in the reheater 109.
  • the letter A in Fig. 7 indicates where the reheat burner is provided, and the letter C indicates the outlet portion of the reheater 109.
  • an object of the present invention is to provide a reheat boiler and a gas temperature controlling method of a reheat boiler that change gas flow patterns of a reheat burner to reduce temperature unevenness of combustion gas on the outlet side of a reheat furnace.
  • a reheat boiler that includes a main boiler in which combustion gas produced by combustion in a burner flows through a super heater and an evaporation tube bank from a furnace, a reheat furnace with a reheat burner provided downstream of the evaporation tube bank, and a reheater provided on an upper side of the reheat furnace, includes a combustion air supply portion that is provided at a position opposite to the reheat burner in the reheat furnace to supply a part of combustion air.
  • At least two stages of such combustion air supply portions are provided in a height direction of the reheat furnace.
  • a part of the combustion air is supplied to the combustion air supply portion by a rate of 50% or less.
  • At least two stages of such combustion air supply portions are provided in a height direction of the reheat furnace, and each stage of the combustion air supply portions supplies a different volume of the combustion air.
  • a gas temperature controlling method of the above mentioned reheat boiler includes: supplying a part of the combustion air into the reheat furnace from a position opposite to the reheat burner to reduce temperature unevenness of the combustion gas on an outlet side of the reheat furnace.
  • the combustion air supply portion at a position opposite to the reheat burner in the reheat furnace to supply a part of the combustion air to the reheat furnace, flow patterns of gas discharged from the reheat burner can be changed. Therefore, temperature unevenness of the combustion gas on the outlet side of the reheat furnace is reduced.
  • the reheat boiler according to the present embodiment has a similar configuration to that of a conventional reheat boiler as illustrated in Fig. 6 and has an air supply portion provided to a reheat furnace; therefore, like elements have like reference numerals, and repeated descriptions will be omitted.
  • Fig. 1A is a schematic of the configuration of the reheat furnace and a reheater included in the reheat boiler according to the first embodiment of the present invention, and is a sectional view along the line I-I in Fig. 2 .
  • Fig. 1B is a sectional view seen in a direction perpendicular to the vertical direction of the reheat furnace illustrated in Fig. 1A .
  • Fig. 2 is a schematic of the configuration of the reheat boiler according to the first embodiment of the present invention.
  • the letter X represents a front wall side of the reheat furnace
  • the letter Y represents a rear wall side of the reheat furnace.
  • this reheat boiler 10A includes, like the configurations of conventional reheat boilers as illustrated in Fig. 6 , the main boiler 106 configured to make combustion gas originating from combustion in the burner 101 flow from the furnace 102 and pass through the SH 104 and the evaporation tube bank 105, the reheat furnace 108 in which the combustion gas is reburned with the reheat burner 107, and the reheater 109 through which the reburned combustion gas passes.
  • the main boiler 106 configured to make combustion gas originating from combustion in the burner 101 flow from the furnace 102 and pass through the SH 104 and the evaporation tube bank 105
  • the reheat furnace 108 in which the combustion gas is reburned with the reheat burner 107
  • the reheater 109 through which the reburned combustion gas passes.
  • the reheat boiler 10A also includes a combustion air supply portion 12 provided at a position opposite to the reheat burner 107 in the reheat furnace 108 to supply a part of combustion air 11 to be supplied to the reheat burner 107 as combustion air 11b.
  • the combustion air 11a refers to combustion air that is a part of the combustion air 11 and is supplied to the reheat burner 107
  • the combustion air 11b refers to combustion air that is another part of the combustion air 11 remaining after being allocated to the reheat burner 107 and is supplied to the combustion air supply portion 12.
  • combustion air supply portion 12 By providing the combustion air supply portion 12 at the position opposite to the reheat burner 107 in the reheat furnace 108, combustion gas 107a discharged from the reheat burner 107 and the combustion air 11b supplied through the combustion air supply portion 12 collide head-on with each other, which facilitates mixing of the combustion gas 107a with the combustion air 11b. Consequently, temperature unevenness of the combustion gas 107a at the outlet of the reheat furnace 108 can be reduced.
  • Fig. 3 is an illustrative view of the temperature distribution of the combustion gas at the outlet of the reheat furnace illustrated in Fig. 1A .
  • the temperature distribution of the combustion gas 107a near the outlet of the reheat furnace 108 falls within a range from 600 to 800 degrees Celsius, for example. With the average temperature being kept about 700 degrees Celsius, this range is narrower than the temperature distribution of the combustion gas 107a near the outlet of the reheat furnace 108 (indicated by the letter B in Figs. 6 and 7 ) included in the conventional reheat boiler 100 as indicated in Fig. 7 .
  • the combustion air 11b that remains after subtracting the combustion air 11a to be supplied to the reheat burner 107 from the combustion air 11 is supplied through the combustion air supply portion 12 preferably by a rate of 50% or less. This is because allocating a majority of the combustion air 11 to the combustion air 11b will cause incomplete combustion of fuel in the reheat burner 107.
  • the combustion gas 107a is first burned with the combustion air 11a supplied into the reheat burner 107 and then with the combustion air 11b supplied through the combustion air supply portion 12 in a step-by-step manner. Burning the combustion gas 107a in two stages with the combustion air 11a and the combustion air 11b can suppress the formation of NO x .
  • the air volume of the combustion air 11b supplied through the combustion air supply portion 12 is adjusted with, for example, a damper or other air volume adjusters.
  • the flow patterns of the combustion gas 107a discharged from the reheat burner 107 can be changed. Accordingly, temperature unevenness of the combustion gas 107a on the outlet side of the reheat furnace 108 can be reduced.
  • This configuration prevents heat conductivity drops of the reheat furnace 108 and the reheater 109 and also prevents high-temperature corrosion of reheater tubes and strength drops of support members in the reheater 109.
  • Fig. 4 is a schematic of the configuration of the reheat boiler according to the second embodiment of the present invention, extracting its reheat furnace and reheater alone.
  • the reheat boiler according to the present embodiment has a similar configuration to that of the reheat boiler according to the first embodiment; therefore, like elements have like reference numerals, and repeated descriptions will be omitted.
  • this reheat boiler 10B includes three-staged combustion air supply portions 12-1 to 12-3 disposed at intervals in the height direction of the reheat furnace 108 and at positions opposite to the reheat burner 107 in the reheat furnace 108.
  • the mixture degrees of combustion gas with the combustion air 11b-1 to 11b-3 can be adjusted desirably, whereby the temperature distribution of the combustion gas near the outlet of the reheat furnace 108 can be controlled.
  • the flow rates of the combustion air 11b-1 to 11b-3 supplied through the air supply portions 12-1 to 12-3, respectively, are adjustable thereby.
  • the mixture degrees of the combustion gas 107a with the combustion air 11b-1 to 11b-3 can be adjusted, whereby the temperature distribution near the outlet of the reheat furnace 108 can be controlled.
  • the temperature distribution near the outlet of the reheat furnace 108 can be smoothed.
  • Fig. 5 is an illustrative view of the temperature distribution of the combustion gas near the outlet of the reheat furnace illustrated in Fig. 4 .
  • Fig. 5 By adjusting the flow rates of the combustion air 11b-1 to 11b-3 supplied through the combustion air supply portions 12-1 to 12-3 as illustrated in Fig. 4 , temperature unevenness of the combustion gas 107a on the outlet side of the reheat furnace 108 can be reduced as indicated in Fig. 5 .
  • the temperature distribution of the combustion gas 107a near the outlet of the reheat furnace 108 falls within a range from 620 to 780 degrees Celsius, for example. With the average temperature being kept about 700 degrees Celsius, this range is narrower than the temperature distribution of the combustion gas 107a near the outlet of the reheat furnace 108 (indicated by the letter B in Fig. 6 ) included in the conventional reheat boiler 100 as indicated in Fig. 7 .
  • This configuration can achieve a smoother temperature distribution than the temperature distribution of the combustion gas 107a near the outlet of the reheat furnace 108 (indicated by the letter B in Fig. 2 ) included in the reheat boiler 10A according to the first embodiment as indicated in Fig. 3 .
  • Fine adjustment of the flow rates of the combustion air 11b-1 to 11b-3 can in turn adjust temperature, retention time, and other conditions of an area where reduction takes place, thereby suppressing the formation of NO x .
  • making the flow rate of the combustion air 11b-1 small and the flow rate of the combustion air 11b-3 large to cause a shortage of air in the reheat furnace 108 can suppress the formation of NO x .
  • the reheat boiler 10B by delivering the combustion air 11b-1 to 11b-3 through the combustion air supply portions 12-1 to 12-3 disposed at intervals in the height direction and at the positions opposite to the reheat burner 107 in the reheat furnace 108 and finely adjusting the flow rates of the combustion air 11b-1 to 11b-3 supplied into the reheat furnace 108, the gas flow patterns from the reheat burner 107 can be changed. Consequently, temperature unevenness of the combustion gas 107a on the outlet side of the reheat furnace 108 can be further reduced.
  • This configuration prevents heat conductivity drops of the reheat furnace 108 and the reheater 109 and also prevents high-temperature corrosion of the reheater tubes and strength drops of the support members in the reheater 109.
  • the mixture degrees of the combustion gas 107a with the combustion air 11b-1 to 11b-3 can be finely adjusted, whereby the temperature distribution at the outlet of the reheat furnace 108 can be controlled. Furthermore, fine adjustment of the air volumes of the combustion air 11b-1 to 11b-3 can in turn adjust conditions of an area where reduction takes place in the reheat furnace 108, thereby suppressing the formation of NO x .
  • combustion air supply portions 12-1 to 12-3 are disposed at intervals in the height direction of the reheat furnace 108 in the reheat boiler 10B according to the present embodiment, the present invention is not limited thereto. Three or more stages of such air supply portions 12 may be provided.
  • reheat boilers 10A and 10B With the reheat boilers 10A and 10B according to the present invention, by supplying a part 11b of the combustion air into the reheat furnace 108 from the position(s) opposite to the reheat burner 107 in the reheat furnace 108, the flow patterns of the combustion gas are changed, whereby temperature unevenness of the combustion gas on the outlet side of the reheat furnace 108 can be reduced. Therefore, they are applicable for marine boilers; however, the present invention is not limited thereto.
  • the reheat boilers and methods for adjusting the temperature of gas output from a reheat boiler according to the present invention can change the flow patterns of combustion gas by supplying a part of combustion air into a reheat furnace through at least one combustion air supply portion disposed at intervals in the height direction of the reheat furnace and at position(s) opposite to a reheat burner in the reheat furnace. Therefore, they are applicable for marine reheat boilers intended to reduce temperature unevenness of the combustion gas on the outlet side of the reheat furnace.

Landscapes

  • 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)
  • Air Supply (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
EP08765283.0A 2007-10-17 2008-06-06 Reheat boiler and gas temperature control method of reheat boiler Not-in-force EP2206952B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007270225A JP5010425B2 (ja) 2007-10-17 2007-10-17 再熱ボイラ及び再熱ボイラのガス温度制御方法
PCT/JP2008/060470 WO2009050917A1 (ja) 2007-10-17 2008-06-06 再熱ボイラ及び再熱ボイラのガス温度制御方法

Publications (3)

Publication Number Publication Date
EP2206952A1 EP2206952A1 (en) 2010-07-14
EP2206952A4 EP2206952A4 (en) 2014-06-11
EP2206952B1 true EP2206952B1 (en) 2016-02-24

Family

ID=40567200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08765283.0A Not-in-force EP2206952B1 (en) 2007-10-17 2008-06-06 Reheat boiler and gas temperature control method of reheat boiler

Country Status (7)

Country Link
US (1) US20100236501A1 (ja)
EP (1) EP2206952B1 (ja)
JP (1) JP5010425B2 (ja)
KR (1) KR101191496B1 (ja)
CN (1) CN101821550B (ja)
DK (1) DK2206952T3 (ja)
WO (1) WO2009050917A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5693280B2 (ja) * 2011-02-14 2015-04-01 三菱重工業株式会社 舶用推進プラント
JP5916777B2 (ja) * 2014-02-14 2016-05-11 三菱重工業株式会社 舶用ボイラおよび舶用ボイラの運転方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956898A (en) * 1974-12-20 1976-05-18 Combustion Engineering, Inc. Marine vapor generator having low temperature reheater
US3948223A (en) * 1975-01-02 1976-04-06 Foster Wheeler Energy Corporation Serially fired steam generator
JPS54103906A (en) * 1978-02-02 1979-08-15 Mitsubishi Heavy Ind Ltd Steam temperature controller for marine reheat boiler
JPS63172806A (ja) * 1987-01-09 1988-07-16 Agency Of Ind Science & Technol 二段燃焼炉
JPH05230785A (ja) * 1992-02-19 1993-09-07 Babcock Hitachi Kk 回収ボイラおよびその燃焼方法
JP2002243106A (ja) 2001-02-21 2002-08-28 Mitsubishi Heavy Ind Ltd ボイラ
US7516620B2 (en) * 2005-03-01 2009-04-14 Jupiter Oxygen Corporation Module-based oxy-fuel boiler
US7475646B2 (en) * 2005-11-30 2009-01-13 General Electric Company System and method for decreasing a rate of slag formation at predetermined locations in a boiler system
JP2009097801A (ja) * 2007-10-17 2009-05-07 Mitsubishi Heavy Ind Ltd ボイラ及びボイラの蒸気温度調整方法
JP5022204B2 (ja) * 2007-12-17 2012-09-12 三菱重工業株式会社 舶用ボイラ構造
JP5148426B2 (ja) * 2008-09-17 2013-02-20 三菱重工業株式会社 再熱ボイラ

Also Published As

Publication number Publication date
EP2206952A1 (en) 2010-07-14
KR20100058644A (ko) 2010-06-03
KR101191496B1 (ko) 2012-10-15
DK2206952T3 (en) 2016-06-06
EP2206952A4 (en) 2014-06-11
CN101821550B (zh) 2012-11-14
WO2009050917A1 (ja) 2009-04-23
JP5010425B2 (ja) 2012-08-29
US20100236501A1 (en) 2010-09-23
JP2009097802A (ja) 2009-05-07
CN101821550A (zh) 2010-09-01

Similar Documents

Publication Publication Date Title
JP4661993B1 (ja) ボイラシステム
JP2018136115A5 (ja)
EP2206952B1 (en) Reheat boiler and gas temperature control method of reheat boiler
EP0884526A1 (en) Boiler
KR101331645B1 (ko) 선박용 보일러 구조
EP2230453B1 (en) Method for homogenizing the heat distribution as well as decreasing the amount of NOx
US20100192876A1 (en) Boiler and method for adjusting temperature of steam output from boiler
CN101297156B (zh) 燃烧室的烧嘴装置，相关的燃烧室及燃料的燃烧方法
CN206234819U (zh) 一种可以实现二次混合燃烧的加热炉喷口装置
JP2011021768A (ja) ボイラ
JP5271660B2 (ja) 旋回燃焼ボイラ
CN111121006B (zh) 卧式煤粉锅炉及其控制方法
CN102124267B (zh) 锅炉结构
CN102132095A (zh) 再热锅炉
JP2008240303A (ja) 原油抽出装置及び原油抽出装置の蒸気生成方法
KR20140096998A (ko) 이중경로의 평행 과열기
CN209495309U (zh) 一种燃烧室上下间隔布置的分级燃烧增压富氧锅炉系统
JP5408150B2 (ja) ボイラシステム
US20240003534A1 (en) A method for heating a heat exchange medium in a fluidized bed boiler, a fluidized bed boiler, and a loopseal heat exchanger
US11117110B2 (en) Method for reducing temperature spread in reformer
JP6587667B2 (ja) 廃棄物焼却炉の燃焼制御方法及び燃焼制御装置
JP5408149B2 (ja) ボイラシステム
CN114688546A (zh) 一种可实现床温汽温双调的侧向布风的热灰回送流量控制装置及方法
CN114607992A (zh) 一种异构管束群换热结构、角管锅炉及其运行方法
CZ33074U1 (cs) Parní kotel pro spalování odpadů

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100413

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20140509

RIC1 Information provided on ipc code assigned before grant

Ipc: F22G 7/12 20060101ALI20140505BHEP

Ipc: F01K 15/04 20060101ALI20140505BHEP

Ipc: F23C 6/04 20060101ALI20140505BHEP

Ipc: F23L 9/02 20060101ALI20140505BHEP

Ipc: F22G 1/16 20060101AFI20140505BHEP

Ipc: F22B 21/08 20060101ALI20140505BHEP

Ipc: F22B 21/00 20060101ALI20140505BHEP

Ipc: F23C 7/02 20060101ALI20140505BHEP

Ipc: F22G 5/04 20060101ALI20140505BHEP

Ipc: F22B 35/00 20060101ALI20140505BHEP

17Q First examination report despatched

Effective date: 20150306

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20151106

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: IMADA, JUNJI

Inventor name: UCHIDA, ISAO

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 776922

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160315

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602008042505

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20160530

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20160224

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 776922

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160524

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160525

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20160628

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160624

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20160622

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20160621

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602008042505

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602008042505

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20161125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160524

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170103

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160630

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160606

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20170606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20080606

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160606

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160630

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170630