EP0128085A2 - Installation et procédé de combustion de suspensions de charbon dans l'eau - Google Patents

Installation et procédé de combustion de suspensions de charbon dans l'eau Download PDF

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Publication number
EP0128085A2
EP0128085A2 EP84401087A EP84401087A EP0128085A2 EP 0128085 A2 EP0128085 A2 EP 0128085A2 EP 84401087 A EP84401087 A EP 84401087A EP 84401087 A EP84401087 A EP 84401087A EP 0128085 A2 EP0128085 A2 EP 0128085A2
Authority
EP
European Patent Office
Prior art keywords
air
mixture
introducing
assembly
burner assembly
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Withdrawn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
EP84401087A
Other languages
German (de)
English (en)
Other versions
EP0128085A3 (fr
Inventor
Norman Buckland
Ruben J. Martin
Robert H. Hickman
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.)
Forney Engineering Co
Forney International Inc
Original Assignee
Forney Engineering Co
Forney International 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 Forney Engineering Co, Forney International Inc filed Critical Forney Engineering Co
Publication of EP0128085A2 publication Critical patent/EP0128085A2/fr
Publication of EP0128085A3 publication Critical patent/EP0128085A3/fr
Withdrawn legal-status Critical Current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
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • 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
    • F23C7/008—Flow control devices
    • 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

Definitions

  • This invention relates to a burner assembly and method for burning a mixture of coal and water and more particularly, to such an assembly and method in which both high velocity air and low velocity air are introduced to support the coal-water mixture in the combustion process.
  • coal-water mixtures i.e., pulverized coal mixed with up to 30% water
  • the burner assembly and method of the present invention features the introduction of a "dual velocity" combustion air system.
  • the first zone provides a "primary combustion and drying zone” and has extremely low (less than 15 ft./sec.) velocity swirling air applied around the injected coal/water mixture.
  • This zone is a substantial part of the total burner throat area and is lined with refractory material.
  • the secondary zone provides the main mass of combustion air which is introduced at relatively high rotating velocity (up to 150 ft./sec.) around the periphery of the first zone.
  • a casing wall 12 extends in a spaced, parallel relation with the wall 10 to define an interior portion 14, it being understood that the latter is bounded by upper and lower walls, as viewed in FIG. l, to define an enclosure, or windbox, which receives air from a source, such as a fan, with the direction of the air flow being shown in general by the flow arrows in FIG. 1.
  • An annular refractory collar 16 extends adjacent and within an opening formed in the wall 10 with its inner surface being shaped to define a throat portion 18 surrounding a combustion zone 20.
  • a tubular refractory throat 22 is provided adjacent the combustion zone 20 and together with the refractory throat 18 de-fines an annular passage 24.
  • a tubular extension 26 is provided on the throat 22 and has an outwardly flared annular end portion 28 which supports a circular slide damper 30.
  • a pair of rollers 22 ar mounted on the slide damper 30 and are in a rolling engagement with a track 34 for permitting slidable movement of the damper 30 relative to the casing wall 12 to define and selectively vary the size of an inlet 36 defined between the flared end portion 28 of the extension 26 and the casing wall 12. As a results some of the air from the windbox 14 will pass through the inlet 36, and into and through the extension 26 and the throat 22.
  • a burner assembly shown in general by the reference numeral 40, extends through the casing wall 12 with its discharge end being located a slight distance inwardly from the corresponding end portion-of the throat 22.
  • the burner assembly 40 includes a fuel gun 42 having a barrel 44 extending within a tubular casing 46 in a slightly spaced relationship, and an air inlet 48 adapted to introduce cooling air between the barrel 44 and the casing 46.
  • the discharge end 44a of the barrel extends slightly outwardly from the casing 46 and is adapted to inject a mixture of coal and water in a substantially conical pattern into the combustion zone 20 and the interior of the furnace. It is understood that an atomizer (not shown) is provided on the discharge end 44a to atomize the fuel from the gun 42.
  • the casing 46 is supported by a support structure 50 disposed on the exterior surface of the casing wall 12, and a stationary swirler stabilizer, shown in general by the reference numeral 52, is disposed on the leading end portion of the casing 46.
  • a stationary swirler stabilizer shown in general by the reference numeral 52. The function of the swirler stabilizer 52 will be described in detail later.
  • a plurality of register vanes 54 are journaled between a first annular plate 56 disposed adjacent the refractory collar 16, and a second annular plate 58 extending outwardly from, and supported by, the refractory throat 22. Although only two vanes 54 are shown in the drawing, several additional vanes are disposed in a circular relationship around the latter throat.
  • the plates 56 and 58 thus define a passage for secondary air from the windbox 14 that passes through the register vanes 54, through the annular passage 24, and into the combustion zone 20.
  • a slide damper 60 is provided which defines, and varies the size of, an inlet 62 for the air passing through the register vanes 54.
  • the slide damper 60 is supported by the annular plate 58 and has two wheels 66 that ride on a track 68 for selectively varying the size of the inlet 62 and therefore the amount of secondary air passing through the register vanes 54, the path 24 and to the combustion zone 20.
  • the slide damper 30 is in a relatively closed position, thus defining a relatively small inlet opening 36 so that the velocity of the primary air passing into the annular passage between the burner assembly 40 and the refractory throat 22 and its casing 26 is relatively low, such as 15 feet per second.
  • the slide damper 60 is maintained in a relatively open position permitting a higher velocity, such as 150 feet.per second, of air flow through the register vane 54, the annular passage 24, and to the combustion zone 20.
  • the burner assembly 40 discharges the coal-water mixture in a substantially conical pattern into the combustion zone 20 and the mixture is ignited by any conventional ignitor (not shown).
  • the primary air from the windbox 14 passes through the inlet 36 at a relatively low velocity and through the annular chamber between the burner assembly 40 and the throat 22 and its extension 26 as shown by the flow arrows.
  • the air then passes through the swirler stabilizer 52 where relatively low velocity vortex and strong recirculation zones are created around the discharge end 44a of the barrel 44.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP84401087A 1983-06-03 1984-05-28 Installation et procédé de combustion de suspensions de charbon dans l'eau Withdrawn EP0128085A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50089883A 1983-06-03 1983-06-03
US500898 1983-06-03

Publications (2)

Publication Number Publication Date
EP0128085A2 true EP0128085A2 (fr) 1984-12-12
EP0128085A3 EP0128085A3 (fr) 1985-12-18

Family

ID=23991390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401087A Withdrawn EP0128085A3 (fr) 1983-06-03 1984-05-28 Installation et procédé de combustion de suspensions de charbon dans l'eau

Country Status (4)

Country Link
EP (1) EP0128085A3 (fr)
JP (1) JPS6036815A (fr)
CA (1) CA1221879A (fr)
SE (1) SE8402929L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967437A1 (fr) * 1998-06-24 1999-12-29 Entreprise Generale De Chauffage Industriel Pillard Amélioration aux appareils à combustion comportant plusieurs conduits de transport de comburant

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB291908A (en) * 1927-03-23 1928-06-14 John Graves Mckean Improvements in and relating to liquid fuel furnace fronts
GB662340A (en) * 1949-01-28 1951-12-05 Thomas Thompson Brown Improvements in or relating to furnace fronts for furnaces, boilers, stoves or the like
DE1551648C3 (de) * 1966-01-19 1979-12-13 Dumag Ohg, Dr.Techn. Ludwig Kaluza & Co, Wien Zerstäubungsbrenner für flüssigen Brennstoff
GB1495491A (en) * 1975-02-12 1977-12-21 Fascione P Process and apparatus for controlled recycling of combustion gases
GB1531601A (en) * 1976-02-18 1978-11-08 Foster Wheeler Power Prod Steam boilers
JPS5712209A (en) * 1980-06-04 1982-01-22 Foster Wheeler Corp Dual adjusting/double flow burner assembly
GB2105457B (en) * 1981-08-14 1985-07-10 Babcock Power Ltd Burner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967437A1 (fr) * 1998-06-24 1999-12-29 Entreprise Generale De Chauffage Industriel Pillard Amélioration aux appareils à combustion comportant plusieurs conduits de transport de comburant
FR2780488A1 (fr) * 1998-06-24 1999-12-31 Pillard Chauffage Amelioration aux appareils a combustion comportant plusieurs conduits de transport de comburant

Also Published As

Publication number Publication date
SE8402929L (sv) 1984-12-04
JPS6036815A (ja) 1985-02-26
EP0128085A3 (fr) 1985-12-18
SE8402929D0 (sv) 1984-05-30
CA1221879A (fr) 1987-05-19

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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

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AK Designated contracting states

Designated state(s): DE FR GB IT NL

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19860602

17Q First examination report despatched

Effective date: 19870202

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

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18W Application withdrawn

Withdrawal date: 19870907

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BUCKLAND, NORMAN

Inventor name: MARTIN, RUBEN J.

Inventor name: HICKMAN, ROBERT H.