US20100236501A1 - Reheat boiler and gas temperature controlling method of reheat boiler - Google Patents

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

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Publication number
US20100236501A1
US20100236501A1 US12/682,354 US68235408A US2010236501A1 US 20100236501 A1 US20100236501 A1 US 20100236501A1 US 68235408 A US68235408 A US 68235408A US 2010236501 A1 US2010236501 A1 US 2010236501A1
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US
United States
Prior art keywords
reheat
combustion air
furnace
combustion
burner
Prior art date
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Abandoned
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US12/682,354
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English (en)
Inventor
Junji Imada
Isao Uchida
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IMADA, JUNJI, UCHIDA, ISAO
Publication of US20100236501A1 publication Critical patent/US20100236501A1/en
Abandoned legal-status Critical Current

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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.
  • 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 ; and a reheater 109 provided at a combustion gas outlet side.
  • SH super heater
  • evaporation tube bank rear tube bank
  • 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.
  • Patent Document 1 Japanese Patent Application Laid-open No. 2002-243106.
  • 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.
  • FIG. 1A is a schematic of the configuration of a reheat furnace and a reheater included in a reheat boiler according to a first embodiment of the present invention.
  • 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.
  • FIG. 3 is an illustrative view of the temperature distribution of combustion gas at the outlet of the reheat furnace.
  • FIG. 4 is a schematic of the configuration of a reheat boiler according to a second embodiment of the present invention, extracting its reheat furnace and reheater alone.
  • FIG. 5 is an illustrative view of the temperature distribution of combustion gas near the outlet of the reheat furnace.
  • FIG. 6 is a schematic of an exemplary configuration of a conventional reheat boiler.
  • FIG. 7 is an illustrative view of the temperature distribution near the outlet of a conventional reheat furnace.
  • 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 10 A 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 , and the reheater 109 through which the reburned combustion gas passes.
  • the reheat boiler 10 A 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 a to be supplied to the reheat burner 107 as combustion air 11 b.
  • the combustion air 11 a refers to combustion air that is a part of the combustion air 11 and is supplied to the reheat burner 107
  • the combustion air 11 b 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 107 a discharged from the reheat burner 107 and the combustion air 11 b supplied through the combustion air supply portion 12 collide head-on with each other, which facilitates mixing of the combustion gas 107 a with the combustion air 11 b . Consequently, temperature unevenness of the combustion gas 107 a 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 107 a 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 107 a 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 11 b that remains after subtracting the combustion air 11 a 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 11 b will cause incomplete combustion of fuel in the reheat burner 107 .
  • the combustion gas 107 a is first burned with the combustion air 11 a supplied into the reheat burner 107 and then with the combustion air 11 b supplied through the combustion air supply portion 12 in a step-by-step manner. Burning the combustion gas 107 a in two stages with the combustion air 11 a and the combustion air 11 b can suppress the formation of NO x .
  • the air volume of the combustion air 11 b 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 107 a discharged from the reheat burner 107 can be changed. Accordingly, temperature unevenness of the combustion gas 107 a 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 .
  • a reheat boiler according to a second embodiment of the present invention will now be described with reference to FIGS. 4 and 5 .
  • 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 10 B 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 11 b - 1 to 11 b - 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 11 b - 1 to 11 b - 3 supplied through the air supply portions 12 - 1 to 12 - 3 , respectively, are adjustable thereby.
  • the mixture degrees of the combustion gas 107 a with the combustion air 11 b - 1 to 11 b - 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 .
  • temperature unevenness of the combustion gas 107 a on the outlet side of the reheat furnace 108 can be reduced as indicated in FIG. 5 .
  • the temperature distribution of the combustion gas 107 a 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 107 a 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 107 a near the outlet of the reheat furnace 108 (indicated by the letter B in FIG. 2 ) included in the reheat boiler 10 A according to the first embodiment as indicated in FIG. 3 .
  • Fine adjustment of the flow rates of the combustion air 11 b - 1 to 11 b - 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 11 b - 1 small and the flow rate of the combustion air 11 b - 3 large to cause a shortage of air in the reheat furnace 108 can suppress the formation of NO x .
  • the reheat boiler 10 B by delivering the combustion air 11 b - 1 to 11 b - 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 11 b - 1 to 11 b - 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 107 a 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 107 a with the combustion air 11 b - 1 to 11 b - 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 11 b - 1 to 11 b - 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 10 B 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.
  • the reheat boilers 10 A and 10 B With the reheat boilers 10 A and 10 B according to the present invention, by supplying a part 11 b 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.

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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)
  • Air Supply (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
US12/682,354 2007-10-17 2008-06-06 Reheat boiler and gas temperature controlling method of reheat boiler Abandoned US20100236501A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007-270225 2007-10-17
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

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US20100236501A1 true US20100236501A1 (en) 2010-09-23

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US12/682,354 Abandoned US20100236501A1 (en) 2007-10-17 2008-06-06 Reheat boiler and gas temperature controlling method of reheat boiler

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

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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20060207523A1 (en) * 2005-03-01 2006-09-21 Jupiter Oxygen Corporation Module-based oxy-fuel boiler
US20070119351A1 (en) * 2005-11-30 2007-05-31 Widmer Neil C System and method for decreasing a rate of slag formation at predetermined locations in a boiler system
US20100192876A1 (en) * 2007-10-17 2010-08-05 Mitsubishi Heavy Industries, Ltd. Boiler and method for adjusting temperature of steam output from boiler
US20100251945A1 (en) * 2007-12-17 2010-10-07 Mitsubishi Heavy Industries, Ltd. Marine boiler structure
US20110139092A1 (en) * 2008-09-17 2011-06-16 Junji Imada Reheat boiler

Family Cites Families (4)

* 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
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20060207523A1 (en) * 2005-03-01 2006-09-21 Jupiter Oxygen Corporation Module-based oxy-fuel boiler
US20070119351A1 (en) * 2005-11-30 2007-05-31 Widmer Neil C System and method for decreasing a rate of slag formation at predetermined locations in a boiler system
US20100192876A1 (en) * 2007-10-17 2010-08-05 Mitsubishi Heavy Industries, Ltd. Boiler and method for adjusting temperature of steam output from boiler
US20100251945A1 (en) * 2007-12-17 2010-10-07 Mitsubishi Heavy Industries, Ltd. Marine boiler structure
US20110139092A1 (en) * 2008-09-17 2011-06-16 Junji Imada Reheat boiler

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Chinese patent office - first office action *
Chinese patent office - second office action *

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Publication number Publication date
EP2206952B1 (en) 2016-02-24
DK2206952T3 (en) 2016-06-06
CN101821550A (zh) 2010-09-01
EP2206952A4 (en) 2014-06-11
EP2206952A1 (en) 2010-07-14
KR20100058644A (ko) 2010-06-03
JP2009097802A (ja) 2009-05-07
CN101821550B (zh) 2012-11-14
WO2009050917A1 (ja) 2009-04-23
JP5010425B2 (ja) 2012-08-29
KR101191496B1 (ko) 2012-10-15

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