EP1007882A1 - Ummantelung für brennerlanze - Google Patents
Ummantelung für brennerlanzeInfo
- Publication number
- EP1007882A1 EP1007882A1 EP98945147A EP98945147A EP1007882A1 EP 1007882 A1 EP1007882 A1 EP 1007882A1 EP 98945147 A EP98945147 A EP 98945147A EP 98945147 A EP98945147 A EP 98945147A EP 1007882 A1 EP1007882 A1 EP 1007882A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rings
- segments
- outer tube
- burner lance
- lance according
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/76—Protecting flame and burner parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2214/00—Cooling
-
- 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
- F23D2900/00018—Means for protecting parts of the burner, e.g. ceramic lining outside of the flame tube
Definitions
- the invention relates to a burner lance, in particular for rotary horns made of several concentric tubes for guiding cooling air, combustion air and fuel, nozzles at the flame-side end and a refractory jacket of the outer tube, as described, for example, in DE-Z .:
- E. Steinbiß multi-jet burner for the special requirements for coal dust combustion "m cement-lime gypsum (35th year) No. 5/1982, pp. 250 to 252, is described.
- a burner with concentric tubes for guiding cooling air, combustion air and fuel, in which the outer tube is surrounded by a refractory coating which is anchored to the outer tube, is known from US Pat. No. 4,614,159.
- jacket nozzles for rotary kilns from a tubular hollow body provided with at least one nozzle opening at its free end and penetrating the furnace jacket it is known according to German Utility Model 72 43 054 to provide the hollow body with a tubular, ceramic jacket in the form of a hollow tube, with between the tubular hollow body and the hollow tube spacers are arranged for setting a coaxial distance.
- Such burner lances in rotary kilns are used for burning cement clinker and lime or for burning and sintering dolomite, magnesite, phosphate or pigments, for annealing diatomaceous earth and for thermal treatment of other raw materials.
- the burner lances used in such rotary kilns are subject to high thermal and mechanical stress, which is greatest at the flame-side end of the burner lance.
- the burner lances protrude freely over a length of up to currently 12 mm from the rotary horns and are exposed to a hot and chemically and mechanically aggressive atmosphere.
- Burner lance is fed in the concentric tubes of combustion air as cooling air or additional cooling air, while the outer tube is provided on its outside with a fire-resistant casing, which usually consists of a refractory ramming compound attached to the anchors of the outer tube. Because of the particularly high stress at the flame-side end of the burner lance, the refractory casing is usually designed to thicken conically towards the flame-side end.
- the refractory casing begins to erode after a short period of operation and to crack due to cracking, so that the furnace operation must be interrupted in order to replace the damaged burner lance with a new burner lance.
- the invention is therefore based on the problem of improving the burner lances so that a longer operating period can be achieved without interrupting the furnace operation.
- the radial anchor elements for the are arranged between the refractory casing and the outer tube, which surrounds rings or segments at a distance have fireproof casing, wherein in the space between the rings or segments and the outer tube open radial openings in the outer tube, through the cooling air from the inside of the outer tube m the space between the rings or segments is guided.
- the rings or segments with their radial anchor elements take on a temperature that lies between that of the outer tube and the outer surface of the refractory casing. This results in lower differences in elongation between the rings or segments and the refractory casing, so that the risk of cracking and chipping is reduced. Furthermore, it is possible to continue operation after parts of the casing have flaked off, since the cooled rings or segments still provide adequate thermal protection.
- the space between the rings or segments and the outer tube serves to guide cooling air to the flame-side end of the burner lance, the number of openings in the outer tube and the length of the area on which the openings are arranged, depending on the length of the burner lance and the raw materials processed in the rotary kiln and the furnace temperature are to be determined, on the one hand to ensure the passage of a sufficient amount of cooling air, on the other hand to keep the losses from the cooling air low and not to cool the rings or segments on their inside too much.
- the rings or segments on their inner side facing the outer tube can have regularly distributed projections as spacers with respect to the outer surface of the outer tube, as a result of which there is only a point of contact results.
- the anchor elements can preferably be arranged in a honeycomb shape on the rings or segments, radially in the direction of Sheathing broadening ribs exist.
- the fireproof sheathing can be introduced into the honeycombs as ramming compound and applied with a thickness such that sufficient coverage of the ribs is achieved. Due to the radially widening ribs, the honeycomb cuts result in the honeycombs, which ensure that the refractory casing is held securely.
- the high-temperature-resistant cast alloy can preferably have a temperature expansion coefficient corresponding to the refractory jacket.
- adjacent rings in the joint area can interlock like a sleeve.
- segments are used rather than complete rings, these can be screwed to the outer tube and also interlock like a sleeve in the joint area.
- Anchor rods possibly in addition to the anchor elements in the form of cast-on ribs, can preferably be welded to the rings or segments.
- Fig. 1 shows a cross section through an inventive dimension
- Fig. 2 shows a longitudinal section through a burner lance according to the invention in the region of the flame-side end.
- Fig. 3 is a detailed view of honeycomb ribs for holding a refractory casing.
- burner lance one is generally designated by the reference numeral 1 marked burner lance is shown, of which only an outer tube 2, but not other, concentrically arranged tubes and no nozzles are shown at the flame end, since these elements are not essential to the invention.
- the outer tube 2 is encompassed by rings 4, which have on their inside projections 6, which serve as spacers with respect to the outer surface of the outer tube 2, so that a distance 5 m is formed in the form of a free space, in the cooling air through radial bores 8 in outer tube 2 can enter and flow to the flame side end of the burner lance 1. Due to the arrangement of the spacers 6 there is an exclusively point-like contact between the rings 4 and the outer tube 2, whereby the heat transfer through conduction between the outer tube 2 and the rings 4 is reduced.
- a sleeve-like extension 12 is arranged which engages over a corresponding area of the adjacent ring 4.
- Radial anchor elements 7 in the form of ribs are arranged on the outer surface of the rings 4, which are arranged like a honeycomb and thus form honeycomb openings 10 between them.
- the ribs 7 widen radially to a widened head 9, so that the honeycombs 10 form undercuts radially inward, which ensure a secure hold for a refractory casing 3 shown as ramming compound in FIG.
- the rings 4 are preferably made of a heat-resistant cast alloy and have a coefficient of thermal expansion that comes as close as possible to that of the refractory casing. Additional anchor rods 11 can be arranged within the honeycomb 10, which can be welded to the rings and branch if necessary, so that the edge regions of the refractory casing 3 are also held securely.
- the rings 4 and the radial bores 8 can extend over a more or less large length region of the burner lance 1, starting from the flame-side end, the number and the diameter of the Radial bores 8 and the width of the free space 5 can be chosen so that the required cooling of the rings 4 is ensured without excessive loss of cooling air.
- these rings can also be divided into segments which are screwed to the outer tube 2, for example. This division can be advantageous if the diameter of the outer tube 2 of the burner lance becomes very large.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
- Blast Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737303A DE19737303C2 (de) | 1997-08-27 | 1997-08-27 | Brennerlanze, insbesondere für Drehrohröfen |
| DE19737303 | 1997-08-27 | ||
| PCT/EP1998/004869 WO1999010681A1 (de) | 1997-08-27 | 1998-08-05 | Ummantelung für brennerlanze |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1007882A1 true EP1007882A1 (de) | 2000-06-14 |
| EP1007882B1 EP1007882B1 (de) | 2001-10-24 |
Family
ID=7840312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98945147A Expired - Lifetime EP1007882B1 (de) | 1997-08-27 | 1998-08-05 | Ummantelung für brennerlanze |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1007882B1 (de) |
| AT (1) | ATE207595T1 (de) |
| DE (2) | DE19737303C2 (de) |
| DK (1) | DK1007882T3 (de) |
| ES (1) | ES2166187T3 (de) |
| WO (1) | WO1999010681A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29911973U1 (de) | 1999-07-09 | 1999-09-30 | Plibrico GmbH, 40210 Düsseldorf | Brennerlanze für eine Zementofenanlage |
| DE102005053820A1 (de) * | 2005-11-11 | 2007-05-16 | Khd Humboldt Wedag Gmbh | Verfahren und Einrichtung zur Überwachung des Zustandes des Schutzmantels eines Drehofenbrenners |
| DE202008007506U1 (de) | 2008-06-04 | 2009-10-08 | Refratechnik Holding Gmbh | Feuerfeste Außenverkleidung für eine Brennerlanze |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7243054U (de) * | 1974-05-16 | Krupp F Gmbh | Manteldüse für Drehrohröfen | |
| JPS6086312A (ja) * | 1983-10-19 | 1985-05-15 | Daido Steel Co Ltd | 微粉炭バ−ナ− |
| DK169446B1 (da) * | 1991-04-19 | 1994-10-31 | Smidth & Co As F L | Brænder til roterovn samt fremgangsmåde til dannelse af en brænderflamme med brænderen |
| DE4405382C1 (de) * | 1994-02-19 | 1995-05-24 | Veitsch Radex Ag | Brennerrohr für Brenner in Industrieöfen |
-
1997
- 1997-08-27 DE DE19737303A patent/DE19737303C2/de not_active Expired - Fee Related
-
1998
- 1998-08-05 ES ES98945147T patent/ES2166187T3/es not_active Expired - Lifetime
- 1998-08-05 AT AT98945147T patent/ATE207595T1/de not_active IP Right Cessation
- 1998-08-05 WO PCT/EP1998/004869 patent/WO1999010681A1/de not_active Ceased
- 1998-08-05 DK DK98945147T patent/DK1007882T3/da active
- 1998-08-05 DE DE59801890T patent/DE59801890D1/de not_active Expired - Fee Related
- 1998-08-05 EP EP98945147A patent/EP1007882B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9910681A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19737303C2 (de) | 1999-09-02 |
| WO1999010681A1 (de) | 1999-03-04 |
| ATE207595T1 (de) | 2001-11-15 |
| DK1007882T3 (da) | 2002-02-11 |
| ES2166187T3 (es) | 2002-04-01 |
| DE59801890D1 (de) | 2001-11-29 |
| DE19737303A1 (de) | 1999-03-04 |
| EP1007882B1 (de) | 2001-10-24 |
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