US20240230085A9 - Combustion device and boiler - Google Patents

Combustion device and boiler Download PDF

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Publication number
US20240230085A9
US20240230085A9 US18/402,857 US202418402857A US2024230085A9 US 20240230085 A9 US20240230085 A9 US 20240230085A9 US 202418402857 A US202418402857 A US 202418402857A US 2024230085 A9 US2024230085 A9 US 2024230085A9
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US
United States
Prior art keywords
ammonia
injection nozzle
injection
pulverized coal
flow rate
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.)
Pending
Application number
US18/402,857
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English (en)
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US20240133550A1 (en
Inventor
Hiroki Ishii
Ryo HANAOKA
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
Assigned to IHI CORPORATION reassignment IHI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HANAOKA, Ryo, ISHII, HIROKI
Publication of US20240133550A1 publication Critical patent/US20240133550A1/en
Publication of US20240230085A9 publication Critical patent/US20240230085A9/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • 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 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • F23C1/10—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air liquid and pulverulent fuel
    • 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 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • F23C1/12—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air gaseous and pulverulent fuel
    • 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 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/48—Nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J7/00—Arrangement of devices for supplying chemicals to fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/087—Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion

Definitions

  • NOx nitrogen oxides
  • a combustion device includes: an ammonia injection nozzle having an injection port facing an internal space of a furnace; a pulverized coal injection nozzle having an injection port facing the internal space of the furnace; an adjustment mechanism that adjusts an injection flow rate of ammonia from the ammonia injection nozzle; and a control device that controls an operation of the adjustment mechanism in such a manner that the injection flow rate of ammonia from the ammonia injection nozzle is higher than an injection flow rate of pulverized coal from the pulverized coal injection nozzle.
  • the adjustment mechanism may include a mechanism that adjusts an opening area of the injection port of the ammonia injection nozzle.
  • the ammonia injection nozzle may include a plurality of ammonia flow paths
  • the adjustment mechanism may include a mechanism that adjusts the number of ammonia flow paths through which ammonia flows among the plurality of ammonia flow paths.
  • the boiler of the present disclosure includes the combustion device described above.
  • FIG. 1 is a schematic diagram illustrating a boiler according to the present embodiment.
  • FIG. 2 is a schematic diagram illustrating a combustion device according to the present embodiment.
  • the central axes of the ammonia injection nozzle 41 , the air injection nozzle 42 , and the pulverized coal injection nozzle 43 intersect with the wall portion of the furnace 2 .
  • the central axes of the ammonia injection nozzle 41 , the air injection nozzle 42 , and the pulverized coal injection nozzle 43 are substantially orthogonal to the wall portion of the furnace 2 .
  • Ammonia is supplied from the ammonia tank 6 into the main body 41 a through the supply port 41 b . As indicated by an arrow A 1 , the ammonia supplied into the main body 41 a flows in the main body 41 a . The ammonia that has passed through the inside of the main body 41 a is injected from the injection port 41 c towards the internal space of the furnace 2 . In this manner, the ammonia injection nozzle 41 is included in such a manner as to face the internal space of the furnace 2 .
  • the injection flow rate of ammonia is faster than the injection flow rate of pulverized coal. Therefore, since the ammonia injected from the ammonia injection nozzle 41 is less likely to be pulled by the flow of the air injected from the air supply unit 5 , the ammonia flows through the center of the flame F in the axial direction of the burner 4 as indicated by solid arrows A 7 .
  • the direction of a flow of ammonia can actually be various directions; however, the main direction is the axial direction of the burner 4 .
  • ammonia (NH 3 ) is decomposed into NH 2 , NH, and N in a region R 2 , where there is less oxygen, on the center side of the flame F.
  • the region R 2 is located radially inward with respect to the region R 1 .
  • the region R 2 is a decomposition region of ammonia.
  • the region R 2 has an elongated shape extending along the central axis of the burner 4 .
  • the injection flow rate of ammonia is lower than the injection flow rate of pulverized coal. Therefore, the ammonia injected from an ammonia injection nozzle 41 is easily pulled by a flow of the air injected from the air supply unit 5 . Therefore, most of the ammonia injected from the ammonia injection nozzle 41 flows along the flow of the air indicated by the broken line arrows A 5 as indicated by solid line arrows A 7 . As a result, ammonia burns, and NOx is generated in a region R 4 , where there is a large amount of oxygen, away from the center of the flame F towards the surface layer side.
  • the region R 4 is a combustion region of ammonia.
  • a part of the ammonia injected from the ammonia injection nozzle 41 is decomposed into NH 2 , NH, and N on the center side of the flame F where there is less oxygen. Then, NOx is reduced by NH 2 , NH, and N in a region R 3 on the distal end side of the flame F.
  • the adjustment mechanism 7 A can adjust the injection flow rate of ammonia from the ammonia injection nozzle 41 A by adjusting the number of ammonia flow paths 41 f through which ammonia flows among the plurality of ammonia flow paths 41 f . As described above, the adjustment mechanism 7 A appropriately achieves adjustment of the injection flow rate of ammonia.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Combustion Of Fluid Fuel (AREA)
US18/402,857 2021-10-14 2024-01-03 Combustion device and boiler Pending US20240230085A9 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2021169141 2021-10-14
JP2021-169141 2021-10-14
PCT/JP2022/024360 WO2023062876A1 (ja) 2021-10-14 2022-06-17 燃焼装置およびボイラ

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/024360 Continuation WO2023062876A1 (ja) 2021-10-14 2022-06-17 燃焼装置およびボイラ

Publications (2)

Publication Number Publication Date
US20240133550A1 US20240133550A1 (en) 2024-04-25
US20240230085A9 true US20240230085A9 (en) 2024-07-11

Family

ID=85988257

Family Applications (1)

Application Number Title Priority Date Filing Date
US18/402,857 Pending US20240230085A9 (en) 2021-10-14 2024-01-03 Combustion device and boiler

Country Status (6)

Country Link
US (1) US20240230085A9 (https=)
JP (1) JP7332060B1 (https=)
KR (1) KR102686756B1 (https=)
CN (1) CN117795250A (https=)
AU (1) AU2022367978B2 (https=)
WO (1) WO2023062876A1 (https=)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102821855B1 (ko) * 2023-05-08 2025-06-16 두산에너빌리티 주식회사 복합 연소 버너 및 이를 포함하는 연소 장치
JP2025005970A (ja) * 2023-06-28 2025-01-17 三菱重工業株式会社 ボイラ、発電設備、およびボイラの制御方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001227711A (ja) * 2000-02-17 2001-08-24 Tokyo Gas Co Ltd 低ＮＯｘバーナ
US20210364163A1 (en) * 2018-05-22 2021-11-25 Mitsubishi Power, Ltd. Burner and combustion device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827612U (ja) * 1981-08-12 1983-02-22 三菱重工業株式会社 粉粒体燃焼バ−ナ
JP2001065810A (ja) 1999-08-25 2001-03-16 Nkk Corp 燃焼バーナの燃焼方法
JP7049773B2 (ja) 2017-03-31 2022-04-07 株式会社Ihi 複合燃焼炉及び複合燃焼ボイラ
JP7027817B2 (ja) * 2017-11-02 2022-03-02 株式会社Ihi 燃焼装置及びボイラ
CN209386281U (zh) * 2018-08-29 2019-09-13 赫普科技发展（北京）有限公司 一种氨混配煤粉锅炉燃烧系统

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001227711A (ja) * 2000-02-17 2001-08-24 Tokyo Gas Co Ltd 低ＮＯｘバーナ
US20210364163A1 (en) * 2018-05-22 2021-11-25 Mitsubishi Power, Ltd. Burner and combustion device

Also Published As

Publication number Publication date
AU2022367978B2 (en) 2024-05-09
KR102686756B1 (ko) 2024-07-19
WO2023062876A1 (ja) 2023-04-20
US20240133550A1 (en) 2024-04-25
JP7332060B1 (ja) 2023-08-23
JPWO2023062876A1 (https=) 2023-04-20
CN117795250A (zh) 2024-03-29
AU2022367978A1 (en) 2024-01-18
KR20240017097A (ko) 2024-02-06

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