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WO1990012761A1 - Four vertical - Google Patents

Four vertical Download PDF

Info

Publication number
WO1990012761A1
WO1990012761A1 PCT/DK1989/000089 DK8900089W WO9012761A1 WO 1990012761 A1 WO1990012761 A1 WO 1990012761A1 DK 8900089 W DK8900089 W DK 8900089W WO 9012761 A1 WO9012761 A1 WO 9012761A1
Authority
WO
WIPO (PCT)
Prior art keywords
kiln
shaft
air
primary
pipe
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.)
Ceased
Application number
PCT/DK1989/000089
Other languages
English (en)
Inventor
Peter Wyss
Hans Zogg
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.)
Rockwool AS
Original Assignee
Rockwool International AS
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 Rockwool International AS filed Critical Rockwool International AS
Priority to PCT/DK1989/000089 priority Critical patent/WO1990012761A1/fr
Publication of WO1990012761A1 publication Critical patent/WO1990012761A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/12—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/235—Heating the glass

Definitions

  • the present invention relates to a vertical kiln or a shaft kiln, especially a shaft kiln for the manufacture of a melt for the production of mineral wool, and comprising a kiln chamber having a primary burning zone and a secondary burning zone immediately above the primary burning zone, and means for introducing primary combustion air into the primary burning zone and through apertures in the shaft wall secondary combustion air into the secondary burning zone.
  • the object is obtained through a shaft kiln according to the invention, especially a shaft kiln for the manufacture of a melt of mineral wool and of the above described type, and having at least one into the kiln shaft from above downward projecting, centrally introduced pipe for- injection of further secondary combustion air into the secondary burning zone of the shaft.
  • the pipe may be made to being axially displaced at variable distances between the shaft bottom and the pipe end facing this bottom.
  • the downwards turning outlet of the pipe may be of a frusto-conical shape and the frusto-conical part may be provided with a number of air injection outlets in its conic surface.
  • Regulating the heigth above the kiln bottom of the centrally mounted pipe in the secondary zone permits the injection of additional secondary air for the obtainment of the optimal secondary combustion conditions at any time, and giving the lower end of the pipe a frusto-conical shape and providing the conic surface with a number of air injection outlets permits a further optimal distribution of the cortbusti ⁇ n air in the zone.
  • Fig. 1 shows a vertical cross-sectional view of a shaft kiln equipped with a centrally mounted pipe for the injection of secondary combustion air according to the invention
  • Fig. 2 also in a vertical cross-secontional view shows a detail of Fig. 1 .
  • a shaft kiln with a shaft 1 has sidewalls 2 and a bottom 3, and at its upper end a feed vessel 13 with a feed hopper 14 for the introduction of raw material into the kiln.
  • the feed hopper may at its bottom be equipped with an axially displacable cone 15 for regulating the feed inlet into the shaft 1.
  • the shaft has at its lower end (Fig. 2) a primary burning zone la and a secondary burning zone lb.
  • Primary combustion air 4a is fed to the primary burning zone via an annular duct 9 and through air inlets or tuyeres 4, while a certain amount of secondary combustion air 5a is fed via annular ducts 10 and air inlets 5 to the secondary burning zone the inlets being placed in sections of different height levels over the shaft bottom 3.
  • the amount of secondary combustion air 5a is fed to this zone and injected through the air inlets 5 into a part of the zone having a temperature of 700 ⁇ -800'C.
  • the amount of injected secondary combustion air is also regulated in height in that the horizontal sections of air inlets having the better placing in relation to the 700 ⁇ -800 ⁇ temperature zone is chosen for the injection of the greater amount of air, while smaller adapted amounts are injected through the inlets of the other rows, the control of the amounts of air being normally made by automatic kiln processing based i.a.
  • a further amount of secondary combustion air 6a for the improvement of the burning conditions is fed to the secondary burning zone lb through a vertical air injection pipe 6 mounted axially in the shaft and projecting downward from above into the secondary burning zone.
  • the pipe 6 is preferably in fixed connection with an approximately horisontally mounted air duct 11 for secondary combustion air.
  • Duct 11 is mounted displacably in height in apertures 12 with appropriate sealings of known type in the kiln wall 2, the displacement clearance of the duct substantially corresponding to the displacement height of the secondary burning zone of 700 ⁇ -800"C in the shaft.
  • the duct 9 and the pipe 6 may be watercooled in a known manner to ensure their proper functioning within the kiln shaft 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

Le four vertical décrit, qui est en particulier conçu pour la fabrication de laine minérale et qui comprend une chambre de four (1) comportant une zone de brûlage primaire (1a) et une zone de brûlage secondaire (1b) ainsi que des entrées (4) pour l'air de combustion primaire (4a) et des entrées (5) pour l'air de combustion secondaire (5a), est équipée d'un tube d'injection d'air (6) axialement mobile dans l'axe vertical du four de haut en bas et servant à acheminer de l'air de combustion secondaire supplémentaire (6a) dans la zone de brûlage secondaire (1b), afin d'améliorer sensiblement la réduction de l'émission de sulphure d'hydrogène (H2S) et de monoxyde de carbone (CO) par les gaz d'échappement de four.
PCT/DK1989/000089 1989-04-17 1989-04-17 Four vertical Ceased WO1990012761A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/DK1989/000089 WO1990012761A1 (fr) 1989-04-17 1989-04-17 Four vertical

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DK1989/000089 WO1990012761A1 (fr) 1989-04-17 1989-04-17 Four vertical

Publications (1)

Publication Number Publication Date
WO1990012761A1 true WO1990012761A1 (fr) 1990-11-01

Family

ID=8153551

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1989/000089 Ceased WO1990012761A1 (fr) 1989-04-17 1989-04-17 Four vertical

Country Status (1)

Country Link
WO (1) WO1990012761A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050132A1 (de) 2007-10-19 2009-04-23 Deutsche Rockwool Mineralwoll Gmbh + Co Ohg Düsenimplantat für Kupol- oder Schachtöfen
CN119468224A (zh) * 2024-08-30 2025-02-18 金隆铜业有限公司 选矿挥发性气体的处理方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE386660B (sv) * 1973-06-18 1976-08-16 Rockwool Ab Forfarande for smeltning i schaktugn samt schaktugn for utovande av forfarandet
WO1987007591A1 (fr) * 1986-06-06 1987-12-17 Rockwool International A/S Procede de preparation d'un bain de fusion pour la production de laine minerale et four a cuve permettant de realiser ledit procede

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE386660B (sv) * 1973-06-18 1976-08-16 Rockwool Ab Forfarande for smeltning i schaktugn samt schaktugn for utovande av forfarandet
WO1987007591A1 (fr) * 1986-06-06 1987-12-17 Rockwool International A/S Procede de preparation d'un bain de fusion pour la production de laine minerale et four a cuve permettant de realiser ledit procede

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050132A1 (de) 2007-10-19 2009-04-23 Deutsche Rockwool Mineralwoll Gmbh + Co Ohg Düsenimplantat für Kupol- oder Schachtöfen
CN119468224A (zh) * 2024-08-30 2025-02-18 金隆铜业有限公司 选矿挥发性气体的处理方法

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