EP0578140A1 - Echangeur de chaleur à cyclones avec le tube d'échappement des gaz dirigé vers le bas - Google Patents

Echangeur de chaleur à cyclones avec le tube d'échappement des gaz dirigé vers le bas Download PDF

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Publication number
EP0578140A1
EP0578140A1 EP93110554A EP93110554A EP0578140A1 EP 0578140 A1 EP0578140 A1 EP 0578140A1 EP 93110554 A EP93110554 A EP 93110554A EP 93110554 A EP93110554 A EP 93110554A EP 0578140 A1 EP0578140 A1 EP 0578140A1
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EP
European Patent Office
Prior art keywords
heat exchanger
cyclone separator
stage
cylindrical upper
cyclone
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
Application number
EP93110554A
Other languages
German (de)
English (en)
Other versions
EP0578140B1 (fr
Inventor
Detlev Dr.-Ing. Kupper
Wolfgang Dipl.-Ing. Rother
Karl Krützner
Gerd-Peter Dipl.-Ing. Meyer
Günter Dipl. - Ing. Driemeier
Ludger Dr.-Ing. Brentrup
Heinz-Herbert Dipl.-Ing. Schmits
Bernhard Dipl.-Ing. Korte
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6462860&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0578140(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0578140A1 publication Critical patent/EP0578140A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C3/04—Multiple arrangement thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • F27B15/003—Cyclones or chain of cyclones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones

Definitions

  • the invention relates to a multi-stage heat exchanger according to the preamble of claim 1.
  • Multi-stage cyclone heat exchangers of the type required in the preamble of claim 1 are known in a wide variety of designs, in particular with and without precalcining device (cf., for example, DUDA, Cement Data Book, 3rd edition, pp. 444 to 516). Since the immersion pipe of the individual cyclone separators is guided outwards through the cylindrical upper part, the individual stages of the heat exchanger are essentially arranged one above the other (albeit slightly offset laterally).
  • Conventional cyclone preheaters, such as those used in particular for preheating cement raw meal therefore have a considerable overall height, depending on the number of preheater stages. However, the height not only requires a very complex support structure for the heat exchanger, but also often impairs the natural landscape.
  • the invention is therefore based on the object of designing a heat exchanger of the type required in the preamble of claim 1 in such a way that a particularly low overall height results.
  • the dip tube of the cyclone separator is guided outwards through the lower part of the cyclone separator and connected via a bend to the connecting line leading to the cyclone separator of the next stage, the cyclone separators being arranged at approximately the same height at least in all stages following the first stage in the gas flow direction .
  • the heat exchanger according to the invention has a height that is less than 50% of the height of a conventional cyclone heat exchanger.
  • FIGS. 1 and 2 show a cyclone separator 1 suitable for use in a heat exchanger according to the invention. It contains a cylindrical upper part 2 and a funnel-shaped lower part 3 with an outlet 4 for the solid separated from the solid-gas mixture.
  • an immersion tube 5 is provided which opens into the cylindrical upper part 2 and is guided outwards through the lower part 3.
  • This dip tube 5 is - as will be explained in more detail with reference to FIGS. 3 and 4 - connected via a manifold 6 to a connecting line leading to the cyclone separator of the next stage.
  • the cyclone separator 1 is also provided with a tangential inlet 7 for a solid-gas mixture, this tangential inlet being connected to a connecting line 8 coming from the previous stage of the heat exchanger.
  • the cyclone separator 1 is also provided with a vortex support 9 which projects from the ceiling 10 into the cylindrical upper part 2. This vortex support 9 stabilizes the swirl flow in the separation space of the cyclone separator 1 and thus increases the degree of separation.
  • FIG. 3 shows the interconnection of several cyclone separators 1, 1 a, 1 b, 1 c, 1 d, 1 to form a multi-stage heat exchanger.
  • the dip tube (e.g. 5) of a cyclone separator (e.g. 1) is connected to the connecting pipe (e.g. 8a) leading to the next stage (e.g. cyclone separator 1a) via the subsequent elbow (e.g. 6).
  • all cyclone separators of the multi-stage heat exchanger are arranged at approximately the same height.
  • the solids outlet (e.g. 4a) of the individual cyclone separators (e.g. 1a) is connected to the connecting line (e.g. 8) leading to the tangential inlet (e.g. 7) of the stage preceding the gas flow direction (e.g. cyclone separator 1).
  • the task of the solid to be preheated in the heat exchanger takes place at 11 in the connecting line 8e leading to the cyclone separator 1e of the last stage.
  • the material separated from the cyclone separator 1 of the first stage is fed directly to a rotary kiln (not shown) in the embodiment shown in FIG.
  • the exhaust gases from the rotary kiln enter the connecting line 8 leading to the cyclone separator 1 and, after flowing through all stages of the heat exchanger, are drawn off by an exhaust gas fan (not illustrated) through the immersion tube 5e of the cyclone separator 1.
  • the multi-stage heat exchanger formed by the cyclone separators 1 to 1 e is connected to a calcining device 12 which is arranged in the loop-shaped gas line 14 arranged between a rotary kiln 13 and the first cyclone separator 1 of the heat exchanger. At 15 this becomes additional Fuel is introduced into the calciner 12, which also receives tertiary air from a cooler (not shown) through a tertiary air line 16.
  • the material discharged via the outlet 4a of the cyclone separator 1 is introduced into the calcining device 12.
  • the material emerging from the outlet 4 of the cyclone separator 1 reaches the rotary kiln 13.
  • 5 to 13 illustrate some variants in the design of the cyclone separator.
  • the cyclone separator 1 is provided with two outlets 4, 4 'for solid matter. These two outlets 4, 4 'can be arranged, for example, at diametrically opposite circumferential points of the connecting line leading to the preceding stage (preferably at the same height).
  • an additional solids outlet 4 ' is provided in the area of the manifold 6 connected to the dip tube 5, through which material dropping out of the gas stream is discharged in this deflection zone.
  • This additional solids outlet 4 ' is expediently connected to a previous part of the heat exchanger in the gas flow direction, for example to the gas line leading to the same stage or to a previous stage of the heat exchanger, to the calcining device 12 (see FIG. 4) or to the inlet of one of the Heat exchanger upstream rotary kiln.
  • Such an additional solids outlet 4 ' is preferably connected in the area of the elbows 6 of the two first stages of the heat exchanger in the gas flow direction (i.e. following the cyclone separators 1 and 1 according to FIGS. 3 and 4). In this way, the degree of separation of these cyclone stages can be improved, and also registered approaches can be eliminated.
  • the material conveyed through such an additional solids outlet can be conveyed further via a chute, a pneumatic or mechanical conveying device.
  • cyclone separator 1 has, in addition to the immersion tube 5 guided downwards, a further immersion tube 5 'which is guided outwards through the upper part 2 of the separator and which leads via a connecting line 17 into the cyclone separator of the next stage Manifold 6 opens.
  • a cyclone separator is characterized by a particularly low pressure drop. The confluence of part of the gas flow in the manifold 6 also counteracts deposits and deposits in this area.
  • FIGS 8 and 9 show different options for holding the multi-stage heat exchanger.
  • the installation levels 18 or 19 can be selected. If the construction is not self-supporting, an installation level 20 is selected on which the cyclone separators are supported with their cylindrical upper part.
  • FIG. 9 illustrates a hanging arrangement of the cyclone separators using a support frame 21.
  • the dip tube 5 and the vortex support 9 can be arranged centrally in the cylindrical upper part 2 of the cyclone separator 1, as shown in FIG.
  • an eccentric arrangement of dip tube 5 and vertebral support 9 is also possible, as is shown schematically in FIG. 11.
  • the upper edge of the dip tube 5 can either be sharp-edged (Fig. 12) or rounded (Fig. 13).
  • air shut-off devices e.g. pendulum flaps
  • pendulum flaps can be provided in the good lines that connect to the solids outlets 4.
  • the ratio of the height to the width of the inlet cross section 7 '(see FIGS. 10 and 11) of the tangential inlet 7 of the cyclone separator 1 is expediently greater than 2: 1.
  • the suspension is set in rotation and an effective separation of gas and solid is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Cyclones (AREA)
EP19930110554 1992-07-09 1993-07-01 Echangeur de chaleur à cyclones avec le tube d'échappement des gaz dirigé vers le bas Expired - Lifetime EP0578140B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4222593 1992-07-09
DE19924222593 DE4222593A1 (de) 1992-07-09 1992-07-09 Wärmetauscher mit Zyklonen mit nach unten herausgeführtem Tauchrohr

Publications (2)

Publication Number Publication Date
EP0578140A1 true EP0578140A1 (fr) 1994-01-12
EP0578140B1 EP0578140B1 (fr) 1996-10-16

Family

ID=6462860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930110554 Expired - Lifetime EP0578140B1 (fr) 1992-07-09 1993-07-01 Echangeur de chaleur à cyclones avec le tube d'échappement des gaz dirigé vers le bas

Country Status (4)

Country Link
EP (1) EP0578140B1 (fr)
DE (2) DE4222593A1 (fr)
DK (1) DK0578140T3 (fr)
ES (1) ES2092731T3 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE883555C (de) * 1950-06-02 1953-07-20 Heinzjosef Junkmann Fliehkraft-Staubabscheider
US2866272A (en) * 1954-09-28 1958-12-30 Smidth & Co As F L Cyclone heat exchange apparatus
FR1418655A (fr) * 1963-12-23 1965-11-19 Smidth & Co As F L Cuisson du ciment exempt d'alcalis dans des cyclones et des fours rotatifs
US4477339A (en) * 1982-08-27 1984-10-16 Whaley John P Cyclone classifier
EP0142181A1 (fr) * 1983-10-28 1985-05-22 Metallgesellschaft Ag Séparateur centrifuge
EP0461003A1 (fr) * 1990-06-05 1991-12-11 Institut Français du Pétrole Séparateur cyclonique à cocourant et ses applications

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116054A (en) * 1960-07-26 1963-12-31 Beteiligungs & Patentverw Gmbh Heating arrangement
FR1527044A (fr) * 1967-04-11 1968-05-31 Fives Lille Cail Installation pour le traitement thermique de matières minérales, en particulier pour la fabrication du ciment
DE3817355A1 (de) * 1988-05-20 1989-11-30 Krupp Polysius Ag Schwebegas-waermetauscher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE883555C (de) * 1950-06-02 1953-07-20 Heinzjosef Junkmann Fliehkraft-Staubabscheider
US2866272A (en) * 1954-09-28 1958-12-30 Smidth & Co As F L Cyclone heat exchange apparatus
FR1418655A (fr) * 1963-12-23 1965-11-19 Smidth & Co As F L Cuisson du ciment exempt d'alcalis dans des cyclones et des fours rotatifs
US4477339A (en) * 1982-08-27 1984-10-16 Whaley John P Cyclone classifier
EP0142181A1 (fr) * 1983-10-28 1985-05-22 Metallgesellschaft Ag Séparateur centrifuge
EP0461003A1 (fr) * 1990-06-05 1991-12-11 Institut Français du Pétrole Séparateur cyclonique à cocourant et ses applications

Also Published As

Publication number Publication date
EP0578140B1 (fr) 1996-10-16
DE59304168D1 (de) 1996-11-21
DE4222593A1 (de) 1994-01-13
DK0578140T3 (da) 1997-03-24
ES2092731T3 (es) 1996-12-01

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