US3373704A - Method of and furnace for burning fine granular substances in moist condition - Google Patents

Method of and furnace for burning fine granular substances in moist condition Download PDF

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Publication number
US3373704A
US3373704A US548487A US54848766A US3373704A US 3373704 A US3373704 A US 3373704A US 548487 A US548487 A US 548487A US 54848766 A US54848766 A US 54848766A US 3373704 A US3373704 A US 3373704A
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Prior art keywords
flow
combustion
furnace
fine granular
air
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Expired - Lifetime
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US548487A
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English (en)
Inventor
Jung Richard
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.)
Hitachi Zosen Inova Steinmueller GmbH
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L&C Steinmueller GmbH
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    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
    • 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 
    • F23C2700/00—Special arrangements for combustion apparatus using fluent fuel
    • F23C2700/06—Combustion apparatus using pulverized fuel
    • F23C2700/063—Arrangements for igniting, flame-guiding, air supply in

Definitions

  • ABSTRACT OF THE DISCLOSURE A method of and furnace for burning fine granular substances in moist condition characterized primarily in that combustion air is at an acute angle directed toward at least one of the respective adjacent front or rear walls in downward direction along said wall or walls, while a locally defined back and upward flow area of the combustion flow is created, and at least the by far major portion of the wet fine granular substance to be injected is, in the form of jets, in upward direction injected into the lower end of the back and upward flow area of the combustion air flow.
  • the present invention relates to a method of and furnace for burning fine granular substances in moist condition.
  • the combustion air is blown into the preferably prismatic combustion chamber from which the flue gas flows downwardly into the next flue through the ceiling of from two to four rows of nozzles parallel to the front wall while flowing from the top in jets parallel to each other.
  • the liquor is passed into the combustion chamber through a plurality of atomizing nozzles extending through the front wall and the side wall. These last mentioned nozzles are so arranged that when the individual jets can spread in a cone-shaped manner without being interfered with, the atomized liquor would approximately be uniformly distributed over the chamber cross section in the neighborhood of the chamber ceiling.
  • the originally parallel air jets combine in the chamber to one or more air strands non-uniformly distributed over the cross section of the chamber, and since between the said strands the hot flue gas flows back from an area of advanced combustion, the length of the paths over which the individual droplets of the atomized liquor flow in the combustion chamber vary considerably.
  • a retarded combustion is to be expected which may be delayed up to the next following flue, whereas the liquor component carried along in a hot return flow will completely burn out within the chamber.
  • FIGS. 1 and 2 illustrate a method of burnin fine granular moist material in the manner heretofore known.
  • FIGS. 3 and 4 illustrate in corresponding views the method according to the present invention, FIG. 4 differing from FIG. 3 in that one nozzle row only is provided.
  • The'method according to the invention may also be realized by guiding the combustion air downwardly only along the rear wall and by guiding the hot return flow with the injected liquor upwardly along the front wall.
  • the fuel will pass into the combustion air flow only after it has reached the vicinity of the combustion chamber ceiling.
  • the aqueous component of the liquor evaporates, and the remainingdry substance is ignited. After this refining operation of the fuel which in its initial condition is rather reaction .inert, only a relatively short path is necessary for a complete combustion in the hot air flow.
  • FIGS. 1 to 4 show the characteristic nozzle arrangements and the flow forms obtained thereby.
  • FIG. 1 shows a longitudinal section through a combustion chamber 1 with nozzle rows 3 and 4 in the ceiling 5 of the chamber for supplying combustion air, the longitudinal section being substantially perpendicular to the front wall 2.
  • FIG. 1 also shows atomizing nozzles 7 extending through opening 6 in front Wall 2. The arrangement of the nozzles is evident from FIG. 2 in the longitudinal plane perpendicular to the front wall.
  • the air jets which flow into the combustion chamber along paths parallel to the longitudinal walls combine in conformity with the drawn flow lines to a single strand which engages the front wall and one of the two side walls 8 or 9. In that area which is not covered by this strand, an extensive return circulatory turbulence with a return flow preferably directed along the return wall 10 will occur.
  • the starting conditions for the course of the reaction of the liquor in jected into the return flow or the air strand vary consid erably with regard to each other.
  • the liquor component passing directly into the air strand will in view of the retarded ignition even at an increased excess in air not burn out completely or only in an inadmissible great distance in a downfiow direction of the combustion chamber.
  • FIG. 4 shows an arrangement with only one nozzle row 3 directed toward the rear wall 8.
  • the liquor is injected into the return flow area adjacent to the front wall.
  • the inclined position of the ceiling favors the return flow into the outer zone leading to the mouth area of the air nozzles.
  • the method according to FIG. 3 or 4 is also suitable for burning moist fine granular substances, as for instance coal sludge or slurry, which is dried within the hot return flow and ignited and can be burned when mixed with the preheated air.
  • moist fine granular substances as for instance coal sludge or slurry
  • a method of burning moist and wet fine granular substance in a combustion chamber having at least approximately parallel front and rear walls which includes the steps of: passing combustion air at an acute angle toward at least one of the respective adjacent one of said walls in downward direction along the same while creating a locally defined back and upward flow area of the combustion air flow, and directing at least the by far major portion of the said wet fine granular substance in the form of jets in upward direction into the lower end of the said back and upward fiow area of said combustion air flow.
  • a furnace comprising a combustion chamber having a front and a rear wall and a ceiling, first nozzle means arranged in said ceiling and having the mouths thereof directed at an acute angle toward at least one of the respective adjacent walls for passing combustion air downwardly in the form of a relatively flat flow along at least one of said walls, and second nozzle means having the mouths thereof directed substantially vertically upwardly and spaced from at least one of said walls by at least approximately half of the distance between said front and rear walls for injecting waste liquor into the lower end of the back and upward flow area of the combustion air flow halfway between said front and rear walls.
  • said first nozzle means comprises a first row of nozzles with the mouths thereof directed at an acute angle to said rear wall and also includes a second row of nozzles with the mouths thereof directed at an acute angle toward said front wall, said acute angles substantially equalling each other, the mouths of said second nozzle means being located at least approximately along the central plane between said front and rear walls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Paper (AREA)
US548487A 1965-05-15 1966-05-09 Method of and furnace for burning fine granular substances in moist condition Expired - Lifetime US3373704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST023827 1965-05-15

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US3373704A true US3373704A (en) 1968-03-19

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US (1) US3373704A (lm)
DE (1) DE1526105B2 (lm)
FI (1) FI46435C (lm)
SE (1) SE332678B (lm)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618571A (en) * 1970-03-13 1971-11-09 Steinmueller Gmbh L & C Process and apparatus for burning sulphite liquor
US3779180A (en) * 1970-10-24 1973-12-18 Steinmueller Gmbh L & C Combustion chamber

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5550241B1 (lm) * 1970-05-08 1980-12-17
US4372226A (en) * 1981-04-30 1983-02-08 Kelley Company Inc. Liquid waste feeding system for an incinerator
US4453476A (en) * 1981-04-30 1984-06-12 Kelley Company, Inc. Liquid waste feeding system for an incinerator
SE453102B (sv) * 1985-01-22 1988-01-11 Stiftelsen Cellulosa Och Pappe Sett vid forbrenning av vid massaframstellning enligt kokprocesser pa natriumbas erhallen indunstad avlut
DE102005001907B4 (de) * 2005-01-14 2007-05-10 Steinmüller Engineering GmbH Verfahren und Anlage zur Verbrennung eines Brennstoffs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1770987A (en) * 1925-03-26 1930-07-22 Combustion Eng Corp Art of burning finely-divided fuel for the generation of steam
US2531810A (en) * 1946-06-05 1950-11-28 Kellogg M W Co Air inlet arrangement for combustion chamber flame tubes
US2582792A (en) * 1946-07-09 1952-01-15 Jonkopings Mek Werkstads Aktie Process for treating waste liquor from paper
US3306334A (en) * 1965-04-26 1967-02-28 Goubsky Gregory Michael Space heaters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1770987A (en) * 1925-03-26 1930-07-22 Combustion Eng Corp Art of burning finely-divided fuel for the generation of steam
US2531810A (en) * 1946-06-05 1950-11-28 Kellogg M W Co Air inlet arrangement for combustion chamber flame tubes
US2582792A (en) * 1946-07-09 1952-01-15 Jonkopings Mek Werkstads Aktie Process for treating waste liquor from paper
US3306334A (en) * 1965-04-26 1967-02-28 Goubsky Gregory Michael Space heaters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618571A (en) * 1970-03-13 1971-11-09 Steinmueller Gmbh L & C Process and apparatus for burning sulphite liquor
US3779180A (en) * 1970-10-24 1973-12-18 Steinmueller Gmbh L & C Combustion chamber

Also Published As

Publication number Publication date
DE1526105B2 (de) 1972-11-30
DE1526105A1 (de) 1969-06-26
FI46435B (lm) 1972-11-30
SE332678B (lm) 1971-02-15
FI46435C (fi) 1973-03-12

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