GB2165633A - Pulverent fuel burner - Google Patents

Pulverent fuel burner Download PDF

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Publication number
GB2165633A
GB2165633A GB08425740A GB8425740A GB2165633A GB 2165633 A GB2165633 A GB 2165633A GB 08425740 A GB08425740 A GB 08425740A GB 8425740 A GB8425740 A GB 8425740A GB 2165633 A GB2165633 A GB 2165633A
Authority
GB
United Kingdom
Prior art keywords
passage
oxygen
burner
pulverized fuel
inner tube
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.)
Withdrawn
Application number
GB08425740A
Other versions
GB8425740D0 (en
Inventor
Roger Dudill
Philip John Young
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.)
Air Products and Chemicals Inc
Original Assignee
Air Products and Chemicals Inc
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 Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
Priority to GB08425740A priority Critical patent/GB2165633A/en
Publication of GB8425740D0 publication Critical patent/GB8425740D0/en
Publication of GB2165633A publication Critical patent/GB2165633A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/005—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or pulverulent fuel
    • 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
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/005—Burners for combustion of pulverulent fuel burning a mixture of pulverulent fuel delivered as a slurry, i.e. comprising a carrying liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00006—Liquid fuel burners using pure oxygen or O2-enriched air as oxidant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The burner (1) comprises an inner tube (2) through which, e.g. particles of coal are blown by compressed air. The inner tube (2) is surrounded by a first passage (3) and a second passage (5). In use, natural gas passes along first passage (3) and leaves the outlet of the burner (1) via a plurality of circumferentially disposed apertures (8) which direct the natural gas radially away from the inner tube (2). Oxygen (or oxygen enriched air) is passed through second passage (5) circumjacent first passage (3). Alternatively, the first passage may feed oxygen, and the second one gas. Particulate plastics material may be used in place of coal, or a water-coal slurry may be employed. <IMAGE>

Description

SPECIFICATION Pulverised fuel burner This invention relates to a pulverized fuel burner and, more particularly but not exclusively, is concerned with a pulverized fuel burner for burning coal dust.
It has been proposed to burn coal dust in an oxygen rich atmosphere. However, with known burners the flame has always been relatively unstable.
It is an object of at least preferred embodiments of the present invention to provide a pulverized fuel burner which will operate with a comparatively stable flame.
According to the present invention there is provided a pulverized fuel burner comprising an inner tube through which pulverized fuel can be introduced, a first passage circumjacent said inner tube through which one of natural gas and oxygen or oxygen enriched air can be introduced, and a second passage circumjacent said first passage through which the other of said natural gas and oxygen or oxygen enriched air can be introduced.
Preferably, the outlet of the first passage is arranged to direct, in use, the natural gas and oxygen or oxygen enriched air outwardly away from the inner tube.
The outlet of the first passage may comprise a single slot or a plurality of holes circumjacent the inner tube.
Advantageously, the second passage is provided with a diffuser. A preferred diffuser comprises an annular ring having a plurality of circumferentially spaced holes each of which is associated with a generally radially extending slot.
For a better understanding of the invention reference will now be made, by way of example, to the accompanying drawings in which: Figure 1 is a longitudinal cross-section through one embodiment of a pulverized fuel burner in accordance with the invention; Figure 2 is an end view of the burner taken on line ll-ll of Fig. 1; and Figure 3 is a view of a detail of the burner shown in Fig. 1.
Referring to the drawings, there is shown a pulverized fuel burner which is generally identified by reference numeral 1. The pulverized fuel burner 1 comprises an inner tube 2 which is of uniform circular cross section. The inner tube 2 is surrounded by a first passage 3 which is connected to a flexible natural gas fuel supply line (not shown) via a connector 4.
A second passage 5 is disposed circumjacent the first passage 3 and is connected to a flexible oxygen suppiy line (not shown) via a connector 6.
The outlet of the first passage 3 comprises an annular ring 7 provided with a plurality of circumferentially spaced apertures 8. As shown in Fig. 1, each aperture 8 slopes radially outwardly.
The second passage 5 is provided with a diffuser 9 which, as shown in Fig. 3, is provided with a plurality of circumferentially spaced holes 10 each of which is provided a radially extending slot 11.
In use, natural gas is introduced through the first passage 3 and an approximately stoiciometric amount of oxygen is introduced through second passage 5. The natural gas and oxygen mix downstream of the burner and are ignited by a pilot burner (not shown).
After ignition the volume of oxygen is increased and pulverized coal (90% by weight less than 90 microns diameter) is blown by compressed air through the inner tube 2. The volume of oxygen supplied is substantially stoichiomatic to the volume of natural gas and coal. The pulverized coal burns with an intense white flame immediately downstream of the end of the burner 1.
In our test burner the flame was exceptionally stable and the amount of unburned coal remarkably low.
Whilst primarily developed for burning pulverized coal, it is envisaged that the burner described will operate with inter alia coal/water slurries and particulate plastics material in place of the coal dust.
In commercial use it is envisaged that the burner 1 will be surrounded by a water cooling jacket 12, part of which is shown in feint lines in Fig. 1.
1. A pulverized fuel burner comprising an inner tube through which pulverized fuel can be introduced, a first passage circumjacent said inner tube through which one of natural gas and oxygen or oxygen enriched air can be introduced, and a second passage circumjacent said first passage through which the other of said natural gas and oxygen or oxygen enriched air can be introduced.
2. A pulverized fuel burner according to Claim 1, wherein the outlet of the first passage is arranged to direct, in use, the natural gas and oxygen or oxygen enriched air outwardly away from the inner tube.
3. A pulverized fuel burner according to Claim 1 or 2, wherein the outlet of the first passage comprises a single slot.
4. A pulverized fuel burner according to Claim 1 or 2, wherein the outlet of said first passage comprises a plurality of holes circumjacent the inner tube.
5. A pulverized fuel burner as claimed in any preceding claim, wherein said second passage is provided with a diffuser.
6. A pulverized fuel burner as claimed in Claim 5, wherein said diffuser comprises an annular ring having a plurality of circumferentially spaced holes each of which is associated with a generally radially extending slot.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Pulverised fuel burner This invention relates to a pulverized fuel burner and, more particularly but not exclusively, is concerned with a pulverized fuel burner for burning coal dust. It has been proposed to burn coal dust in an oxygen rich atmosphere. However, with known burners the flame has always been relatively unstable. It is an object of at least preferred embodiments of the present invention to provide a pulverized fuel burner which will operate with a comparatively stable flame. According to the present invention there is provided a pulverized fuel burner comprising an inner tube through which pulverized fuel can be introduced, a first passage circumjacent said inner tube through which one of natural gas and oxygen or oxygen enriched air can be introduced, and a second passage circumjacent said first passage through which the other of said natural gas and oxygen or oxygen enriched air can be introduced. Preferably, the outlet of the first passage is arranged to direct, in use, the natural gas and oxygen or oxygen enriched air outwardly away from the inner tube. The outlet of the first passage may comprise a single slot or a plurality of holes circumjacent the inner tube. Advantageously, the second passage is provided with a diffuser. A preferred diffuser comprises an annular ring having a plurality of circumferentially spaced holes each of which is associated with a generally radially extending slot. For a better understanding of the invention reference will now be made, by way of example, to the accompanying drawings in which: Figure 1 is a longitudinal cross-section through one embodiment of a pulverized fuel burner in accordance with the invention; Figure 2 is an end view of the burner taken on line ll-ll of Fig. 1; and Figure 3 is a view of a detail of the burner shown in Fig. 1. Referring to the drawings, there is shown a pulverized fuel burner which is generally identified by reference numeral 1. The pulverized fuel burner 1 comprises an inner tube 2 which is of uniform circular cross section. The inner tube 2 is surrounded by a first passage 3 which is connected to a flexible natural gas fuel supply line (not shown) via a connector 4. A second passage 5 is disposed circumjacent the first passage 3 and is connected to a flexible oxygen suppiy line (not shown) via a connector 6. The outlet of the first passage 3 comprises an annular ring 7 provided with a plurality of circumferentially spaced apertures 8. As shown in Fig. 1, each aperture 8 slopes radially outwardly. The second passage 5 is provided with a diffuser 9 which, as shown in Fig. 3, is provided with a plurality of circumferentially spaced holes 10 each of which is provided a radially extending slot 11. In use, natural gas is introduced through the first passage 3 and an approximately stoiciometric amount of oxygen is introduced through second passage 5. The natural gas and oxygen mix downstream of the burner and are ignited by a pilot burner (not shown). After ignition the volume of oxygen is increased and pulverized coal (90% by weight less than 90 microns diameter) is blown by compressed air through the inner tube 2. The volume of oxygen supplied is substantially stoichiomatic to the volume of natural gas and coal. The pulverized coal burns with an intense white flame immediately downstream of the end of the burner 1. In our test burner the flame was exceptionally stable and the amount of unburned coal remarkably low. Whilst primarily developed for burning pulverized coal, it is envisaged that the burner described will operate with inter alia coal/water slurries and particulate plastics material in place of the coal dust. In commercial use it is envisaged that the burner 1 will be surrounded by a water cooling jacket 12, part of which is shown in feint lines in Fig. 1. CLAIMS
1. A pulverized fuel burner comprising an inner tube through which pulverized fuel can be introduced, a first passage circumjacent said inner tube through which one of natural gas and oxygen or oxygen enriched air can be introduced, and a second passage circumjacent said first passage through which the other of said natural gas and oxygen or oxygen enriched air can be introduced.
2. A pulverized fuel burner according to Claim 1, wherein the outlet of the first passage is arranged to direct, in use, the natural gas and oxygen or oxygen enriched air outwardly away from the inner tube.
3. A pulverized fuel burner according to Claim 1 or 2, wherein the outlet of the first passage comprises a single slot.
4. A pulverized fuel burner according to Claim 1 or 2, wherein the outlet of said first passage comprises a plurality of holes circumjacent the inner tube.
5. A pulverized fuel burner as claimed in any preceding claim, wherein said second passage is provided with a diffuser.
6. A pulverized fuel burner as claimed in Claim 5, wherein said diffuser comprises an annular ring having a plurality of circumferentially spaced holes each of which is associated with a generally radially extending slot.
7. A pulverized fuel burner substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB08425740A 1984-10-11 1984-10-11 Pulverent fuel burner Withdrawn GB2165633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08425740A GB2165633A (en) 1984-10-11 1984-10-11 Pulverent fuel burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08425740A GB2165633A (en) 1984-10-11 1984-10-11 Pulverent fuel burner

Publications (2)

Publication Number Publication Date
GB8425740D0 GB8425740D0 (en) 1984-11-14
GB2165633A true GB2165633A (en) 1986-04-16

Family

ID=10568047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08425740A Withdrawn GB2165633A (en) 1984-10-11 1984-10-11 Pulverent fuel burner

Country Status (1)

Country Link
GB (1) GB2165633A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278221A1 (en) * 1987-01-09 1988-08-17 Nippon Kokan Kabushiki Kaisha Tuyere of blast furnace
EP0296772A2 (en) * 1987-06-26 1988-12-28 Air Products And Chemicals, Inc. Oxy-fuel burner for burning pulverised fuel
EP0296773A2 (en) * 1987-06-26 1988-12-28 Air Products And Chemicals, Inc. Method of operating a system for burning pulverised fuel
WO2018074166A1 (en) * 2016-10-21 2018-04-26 Ｊｆｅスチール株式会社 Auxiliary burner for electric furnace

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB298080A (en) * 1927-10-01 1929-08-29 Witkowitzer Bergb Gewerkschaft Coal dust, gas and oil burner for constant velocities of ejection under variable loads
GB654374A (en) * 1944-08-25 1951-06-13 C H Wheeler Mfg Co Method and apparatus for treating and burning solid fuel
GB1175197A (en) * 1965-12-24 1969-12-23 Babcock & Wilcox Ltd Improvements in or relating to Burners.
GB1576345A (en) * 1976-04-16 1980-10-08 Colmant Cuvelier Burner for powdered fuel
GB2070761A (en) * 1980-02-25 1981-09-09 Kawasaki Heavy Ind Ltd Pulverized coal burner
GB2098721A (en) * 1981-02-16 1982-11-24 Steag Ag A method of igniting a pulverised fuel main burner and a burner arrangement for carrying out the method
GB2119081A (en) * 1982-04-27 1983-11-09 Foster Wheeler Energy Corp Furnace combustion system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB298080A (en) * 1927-10-01 1929-08-29 Witkowitzer Bergb Gewerkschaft Coal dust, gas and oil burner for constant velocities of ejection under variable loads
GB654374A (en) * 1944-08-25 1951-06-13 C H Wheeler Mfg Co Method and apparatus for treating and burning solid fuel
GB1175197A (en) * 1965-12-24 1969-12-23 Babcock & Wilcox Ltd Improvements in or relating to Burners.
GB1576345A (en) * 1976-04-16 1980-10-08 Colmant Cuvelier Burner for powdered fuel
GB2070761A (en) * 1980-02-25 1981-09-09 Kawasaki Heavy Ind Ltd Pulverized coal burner
GB2098721A (en) * 1981-02-16 1982-11-24 Steag Ag A method of igniting a pulverised fuel main burner and a burner arrangement for carrying out the method
GB2119081A (en) * 1982-04-27 1983-11-09 Foster Wheeler Energy Corp Furnace combustion system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278221A1 (en) * 1987-01-09 1988-08-17 Nippon Kokan Kabushiki Kaisha Tuyere of blast furnace
US4887800A (en) * 1987-01-09 1989-12-19 Nippon Kokan Kabushiki Kaisha Tuyere of blast furnace
EP0296772A2 (en) * 1987-06-26 1988-12-28 Air Products And Chemicals, Inc. Oxy-fuel burner for burning pulverised fuel
EP0296773A2 (en) * 1987-06-26 1988-12-28 Air Products And Chemicals, Inc. Method of operating a system for burning pulverised fuel
GB2206196A (en) * 1987-06-26 1988-12-29 Air Prod & Chem System for burning pulverised fuel
EP0296773A3 (en) * 1987-06-26 1989-03-22 Air Products And Chemicals, Inc. System for burning pulverised fuel
EP0296772A3 (en) * 1987-06-26 1989-03-29 Air Products And Chemicals, Inc. Oxy-fuel burner for burning pulverised fuel
US4864943A (en) * 1987-06-26 1989-09-12 Air Products And Chemicals, Inc. System for burning pulverized fuel
WO2018074166A1 (en) * 2016-10-21 2018-04-26 Ｊｆｅスチール株式会社 Auxiliary burner for electric furnace
JPWO2018074166A1 (en) * 2016-10-21 2018-10-18 Ｊｆｅスチール株式会社 Auxiliary burner for electric furnace
CN109844408A (en) * 2016-10-21 2019-06-04 杰富意钢铁株式会社 Electric furnace booster burners
US11293694B2 (en) 2016-10-21 2022-04-05 Jfe Steel Corporation Auxiliary burner for electric furnace

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Publication number Publication date
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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)