EP0342340A2 - Echangeur thermique pour gaz contenant des particules en suspension - Google Patents

Echangeur thermique pour gaz contenant des particules en suspension Download PDF

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Publication number
EP0342340A2
EP0342340A2 EP89105487A EP89105487A EP0342340A2 EP 0342340 A2 EP0342340 A2 EP 0342340A2 EP 89105487 A EP89105487 A EP 89105487A EP 89105487 A EP89105487 A EP 89105487A EP 0342340 A2 EP0342340 A2 EP 0342340A2
Authority
EP
European Patent Office
Prior art keywords
cyclone
gas
separating
dip tube
cyclones
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
EP89105487A
Other languages
German (de)
English (en)
Other versions
EP0342340A3 (en
EP0342340B1 (fr
Inventor
Wolfgang Dipl.-Ing. Rother
Heinz-Herbert Dipl.-Ing. Schmits
Heinz-Werner Dipl.-Ing. Thiemeyer
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
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0342340A2 publication Critical patent/EP0342340A2/fr
Publication of EP0342340A3 publication Critical patent/EP0342340A3/de
Application granted granted Critical
Publication of EP0342340B1 publication Critical patent/EP0342340B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • 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
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/081—Shapes or dimensions
    • 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
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
    • 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
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/26—Multiple arrangement thereof for series flow
    • 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

Definitions

  • the invention relates to a floating gas preheater for a heat exchange between gas and fines in front of a furnace, according to the preamble of claim 1.
  • Suspended gas preheaters of the required type are well known in practice. They are widely used, for example, in the cement, lime and plaster industry as well as in the processing of ore materials.
  • a cyclone preheater version in which centrally arranged separating cyclones of larger diameter and essentially conventional design as well as several outer separating cyclones of smaller diameter with downward sloping cover walls and feed lines are provided in individual levels, whereby a special distribution device is connected to the upper gas outlet pipe of each central separating cyclone, which is connected on the one hand to the lines leading to the outer cyclones and on the other hand to a good outlet line from the next upper central separating cyclone.
  • the invention has for its object to further develop a suspended gas preheater of the type required in the preamble of claim 1 in such a way that it works with a relatively simple design both for the execution of the individual separating cyclones and for the overall construction particularly advantageously with regard to pressure losses and dust separation can.
  • this floating gas preheater (and also referred to as cyclone preheater), which is preferably used for preheating and calcining raw cement flour, is explained.
  • the suspended gas preheater contains a number of separating cyclones which are arranged approximately vertically axially in superimposed floors, this suspended gas preheater being assigned to or connected upstream of a kiln, for example designed as a rotary kiln 5, for the preheated raw cement meal.
  • the bottom separating cyclone 4 of the preheater is connected to the rotary kiln 5 on the one hand via a good line 6 and on the other hand via a furnace offgas line 7.
  • this kiln exhaust gas line 7 can at the same time be designed as a calcining device for the raw cement meal preheated in the individual cyclone stages.
  • the upper section 7a of the furnace exhaust line 7 is - as in Fig.1 indicated - bent approximately in a loop, and it opens into the inlet port 1a of this lowest separating cyclone 1 with an obliquely downwardly inclined, approximately straight end.
  • All separating cyclones 1, 2, 3, 4 each contain - as can be seen in particular from FIG. 2 - an essentially straight, preferably largely cylindrical upper part 8, which has a flat (straight surface) cyclone top wall 9, and also a coaxial with the upper part 8 connected, funnel-shaped lower part 10, an approximately tangentially (see FIG. 3) into the upper part 8 inlet stub 11 for the gas-good mixture, further a gas outlet pipe 12 leading from the area of the cyclone top wall 9 and one to the lower The end of the lower part 10 is followed by a good outlet pipe 13. As can be seen in FIG. 2 - an essentially straight, preferably largely cylindrical upper part 8, which has a flat (straight surface) cyclone top wall 9, and also a coaxial with the upper part 8 connected, funnel-shaped lower part 10, an approximately tangentially (see FIG. 3) into the upper part 8 inlet stub 11 for the gas-good mixture, further a gas outlet pipe 12 leading from the area of the cyclone top wall 9 and one
  • the separating cyclones 1 to 4 are connected to one another by gas lines 14 to 16 and by good lines 17 to 19, these gas lines 14 to 16 being connected to the corresponding inlet connections 11 and gas outlet pipes 12 and the good lines 17 to 19 to the corresponding good outlet pipes 13 on the one hand and to the gas lines of the next lower cyclo netage, on the other hand, are connected in a generally known manner;
  • the furnace exhaust gas line 7 and the good line 6 from the bottom separating cyclone 8 are also to be added, as already described above.
  • the raw cement meal to be heated is fed to the uppermost separating cyclone 4 according to arrow 20 via the associated gas line 16, while the exhaust gas (dashed arrow 21) via an exhaust line 22 from the uppermost separator cyclone 4 is discharged.
  • All separating cyclones 1 to 4 basically have the same design features in that their cyclone end walls 9 and their inlet connections 11 (or 1a at the lowest cyclone 1) are inclined at the same acute angle ⁇ to the horizontal H, as is the case both in FIG. 2 and in FIG can be seen from the cyclone diagrams in Fig.1.
  • the said angle of inclination ⁇ of the cyclone cover walls and inlet connection can be approximately 5 to 45 °; in practical implementation, however, it can be approximately 12 to 20 °, preferably approximately 15 °.
  • the mouth end 7a 'of the loop-shaped section 7a of the furnace exhaust gas line 7 and the inlet port 1a and the cyclone top wall 91 of the bottom separating cyclone 1 have a falling slope in the gas flow direction.
  • the inlet connection 11 and the cyclone cover walls 9 of all the other separating cyclones 2 to 4 have an incline which increases in the flow direction, as can be seen in FIG. 2 as well as in FIG.
  • the separating cyclones in the previously known heat exchangers usually do not have a dip tube, since this is due in particular to the high thermal stress there are significant problems with the lifespan of these dip tubes.
  • the gas outlet pipes 12 of the separating cyclones 1 and 2 provided in the hotter area of the heat exchanger only protrude into the upper part of the cyclone 8 in the form of a relatively short dip tube collar, as shown in FIG. 2 by a dash-dotted line at 23a is indicated.
  • the length of such a dip tube collar 23a corresponds approximately to 0.05 to 0.2 times, preferably approximately 0.07 to 0.15 times the diameter d of this dip tube collar, this diameter d in turn being the diameter of the Corresponding gas outlet pipe 12 above.
  • both the dip tube 23 and the dip tube collar 23a is cut off obliquely, so that in both cases there is an orifice opening (see, for example, 23 ′) which lies in one plane, which runs essentially parallel to the cyclone top wall 9.
  • This state of affairs can also be seen in the upper cyclones 2 to 4 in FIG. 1, that is to say in the separating cyclones into which the mouth end of the ascending gas lines 14 to 16 and the inlet connections 11 and the cyclone cover walls 9 are inclined so as to rise in the gas flow direction.
  • the dip tube 23 or the dip tube collar 23a is rotated about the vertical tube axis VA so that the lowest point, for example 23 ⁇ , of each dip tube and dip tube collar in the associated cyclone upper part 8 faces approximately the area of the inlet opening 11 'of the inlet nozzle 11.
  • the obliquely cut-off mouth end of the dip tube collar 23a 'about the vertical tube axis VA is then also rotated so that the lowest point of this dip tube collar 23a' faces approximately the area of the inflow opening of the inlet connector 1a there, as can be seen in a comparison between the representation in Fig.1 and the representation in Fig.2 can easily imagine without additional graphic explanation.
  • the vertical tube axis RA of the dip tube 123 (or a corresponding dip tube collar) runs at a corresponding distance parallel to the associated vertical cyclone axis VA, the vertical tube axis of the associated gas outlet tube expediently coinciding with the vertical tube axis RA of the dip tube 123.
  • a floating gas heat exchanger with the separating cyclones designed and arranged according to the invention can also be designed without a calcining device (and without a calcining loop), i.e. it then only consists of completely identical cyclones corresponding to the separating cyclones 2 to 4 in FIG. 1 or that shown in FIG. 2.
  • a floating gas heat exchanger arranged from the separating cyclones according to FIG. 2 can be adapted and used not only for heating powdery and fine-grained fine material, but - as is known per se - for cooling fine material.
  • the upper part of the separating cyclones has a substantially straight, cylindrical shape - somewhat different from 2 and 3 - can also be designed such that the inlet connection for the gas-good mixture connected approximately tangentially to it can also be connected approximately spirally, ie at the upper end of the cyclone upper part the inlet connection closes via a corresponding one Circumferential section in the form of an entry spiral, this upper circumferential section of the upper part — viewed in plan — shrinking in a spiral from the entry opening to the connection to the remaining cylindrical section (as is known per se).

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Geometry (AREA)
  • Furnace Details (AREA)
  • Cyclones (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP89105487A 1988-05-20 1989-03-28 Echangeur thermique pour gaz contenant des particules en suspension Expired - Lifetime EP0342340B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817355 1988-05-20
DE3817355A DE3817355A1 (de) 1988-05-20 1988-05-20 Schwebegas-waermetauscher

Publications (3)

Publication Number Publication Date
EP0342340A2 true EP0342340A2 (fr) 1989-11-23
EP0342340A3 EP0342340A3 (en) 1990-05-16
EP0342340B1 EP0342340B1 (fr) 1993-06-16

Family

ID=6354859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105487A Expired - Lifetime EP0342340B1 (fr) 1988-05-20 1989-03-28 Echangeur thermique pour gaz contenant des particules en suspension

Country Status (5)

Country Link
US (1) US4901448A (fr)
EP (1) EP0342340B1 (fr)
CA (1) CA1315096C (fr)
DE (2) DE3817355A1 (fr)
ES (1) ES2040919T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222593A1 (de) * 1992-07-09 1994-01-13 Krupp Polysius Ag Wärmetauscher mit Zyklonen mit nach unten herausgeführtem Tauchrohr
WO2011032620A1 (fr) * 2009-09-21 2011-03-24 Outotec Oyj Cyclone pour la séparation de particules collantes de courants gazeux

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19917310A1 (de) * 1999-04-16 2000-10-19 Krupp Polysius Ag Vorrichtung zur thermischen Behandlung von Material
DE19960575A1 (de) * 1999-12-15 2001-06-21 Krupp Polysius Ag Verfahren und Anlage zur Reduktion von Feinerzen
CN1331738C (zh) * 2000-09-01 2007-08-15 山东鲁北企业集团总公司 一种石膏分解工艺及装置
CN104100968B (zh) * 2014-07-25 2016-03-30 中国华能集团清洁能源技术研究院有限公司 一种带有整体倾斜中心筒的循环流化床锅炉旋风分离器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1090940B (de) * 1954-07-30 1960-10-13 Reinhold Kamps Dipl Ing Dr Fliehkraftstaubabscheider mit einem oder mehreren in einem Gehaeuse angeordneten Zyklonen, insbesondere fuer Krackanlagen
DE1154768B (de) * 1960-07-27 1963-09-19 Westfalia Dinnendahl Groeppel Einrichtung zum Vorwaermen und Trocknen von Zementrohmehl oder anderem feinkoernigem Gut
US3865242A (en) * 1972-12-15 1975-02-11 Combustion Eng Upstream classifier for a multi-separator
JPS59213460A (ja) * 1983-05-17 1984-12-03 Ube Ind Ltd サイクロン

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797077A (en) * 1954-08-07 1957-06-25 Kloeckner Humboldt Deutz Ag Apparatus for preheating kiln-feed material by kiln-exit gases
DE3000494A1 (de) * 1980-01-08 1981-07-09 Krupp Polysius Ag, 4720 Beckum Verfahren und anlage zur waermebehandlung von feinkoernigem gut
DE3111527A1 (de) * 1981-03-24 1982-10-07 Krupp Polysius Ag, 4720 Beckum Waermetauscher
DE3542271C1 (en) * 1985-11-29 1987-06-25 Krupp Gmbh Apparatus for heat recovery and removing dusts from hot exhaust gases

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1090940B (de) * 1954-07-30 1960-10-13 Reinhold Kamps Dipl Ing Dr Fliehkraftstaubabscheider mit einem oder mehreren in einem Gehaeuse angeordneten Zyklonen, insbesondere fuer Krackanlagen
DE1154768B (de) * 1960-07-27 1963-09-19 Westfalia Dinnendahl Groeppel Einrichtung zum Vorwaermen und Trocknen von Zementrohmehl oder anderem feinkoernigem Gut
US3865242A (en) * 1972-12-15 1975-02-11 Combustion Eng Upstream classifier for a multi-separator
JPS59213460A (ja) * 1983-05-17 1984-12-03 Ube Ind Ltd サイクロン

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 78 (C-274)(1801), 06 April 1985# *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 78 (C-274)[1801], 6th April 1985; & JP-A-59 213 460 (UBE KOSAN K.K.) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222593A1 (de) * 1992-07-09 1994-01-13 Krupp Polysius Ag Wärmetauscher mit Zyklonen mit nach unten herausgeführtem Tauchrohr
WO2011032620A1 (fr) * 2009-09-21 2011-03-24 Outotec Oyj Cyclone pour la séparation de particules collantes de courants gazeux
US8657934B2 (en) 2009-09-21 2014-02-25 Outotec Oyj Cyclone for separating sticky particles from gas streams
EA021413B1 (ru) * 2009-09-21 2015-06-30 Ототек Оюй Циклон для очистки газового потока от слипающихся частиц

Also Published As

Publication number Publication date
EP0342340A3 (en) 1990-05-16
EP0342340B1 (fr) 1993-06-16
DE3817355A1 (de) 1989-11-30
CA1315096C (fr) 1993-03-30
DE58904693D1 (de) 1993-07-22
ES2040919T3 (es) 1993-11-01
US4901448A (en) 1990-02-20

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