EP0451518A2 - Dispositif d'échange de chaleur - Google Patents

Dispositif d'échange de chaleur Download PDF

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Publication number
EP0451518A2
EP0451518A2 EP91103785A EP91103785A EP0451518A2 EP 0451518 A2 EP0451518 A2 EP 0451518A2 EP 91103785 A EP91103785 A EP 91103785A EP 91103785 A EP91103785 A EP 91103785A EP 0451518 A2 EP0451518 A2 EP 0451518A2
Authority
EP
European Patent Office
Prior art keywords
perforated plate
plate
holes
solid particles
tubes
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
EP91103785A
Other languages
German (de)
English (en)
Other versions
EP0451518B1 (fr
EP0451518A3 (en
Inventor
Rainer Dr. Greffrath
Hans Fassbender
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.)
SGL Technik GmbH
Original Assignee
Krupp Buckau Maschinenbau GmbH
Sigri Great Lakes Carbon GmbH
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 Buckau Maschinenbau GmbH, Sigri Great Lakes Carbon GmbH filed Critical Krupp Buckau Maschinenbau GmbH
Priority to AT9191103785T priority Critical patent/ATE105399T1/de
Publication of EP0451518A2 publication Critical patent/EP0451518A2/fr
Publication of EP0451518A3 publication Critical patent/EP0451518A3/de
Application granted granted Critical
Publication of EP0451518B1 publication Critical patent/EP0451518B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D13/00—Heat-exchange apparatus using a fluidised bed

Definitions

  • the invention relates to a device for heat transfer in which solid particles are guided in an internal circuit, consisting of a housing, pipes held between a lower and an upper tube plate, an inlet chamber with inlet ports below the lower tube plate and a perforated plate arranged therein and one Outlet chamber with outlet nozzle above the upper tube sheet.
  • Devices of this type are referred to as fluidized bed heat exchangers and are used when media have to be cooled or heated that tend to cake or crust. This is the case with liquids in which dissolved substances fail, with suspensions or corresponding gases.
  • suitable solid particles are added to the medium to be treated.
  • a fundamental problem with all fluidized bed heat exchangers is the distribution of the solid particles as evenly as possible all pipes.
  • the invention has for its object to improve a device of the type described above by simple, constructive measures so that there is an optimal operating behavior both when starting up and during stationary operation.
  • an upper chamber plate with holes forming a prechamber is arranged above and at a distance from the upper tube sheet, that this upper perforated plate has at least one passage opening that is large in relation to the holes and that at least between the upper tube sheet and the upper perforated plate a separating plate is arranged which delimits the antechamber against the passage opening.
  • the medium to be treated that is to say to be heated or cooled, is fed to a heat exchanger of this type via an inlet connection at the lower end. It hits a baffle, one uniform flow distribution across the entire heat exchanger cross section.
  • the solid particles are kept in the holes between the lower perforated plate in the space between the latter and the lower tube plate due to the high flow velocity of the medium. They flow through the risers together with the medium to be treated. They emerge at the upper end of the tubes and do not get into the outlet chamber as usual, but into the prechamber according to the invention, which is formed by the upper tube sheet, the housing, an upper perforated plate and at least one separating plate.
  • the distance between the upper perforated plate and the upper tube plate is less than 10 times the diameter of the heat exchanger tubes, so that the solid particles are transported through the holes and there is no particle jam in the prechamber.
  • a small number of tubes in relation to the total number of heat exchanger tubes works as downpipes. These open into one or more through openings in the upper perforated plate, which is or are delimited from the prechamber by one or more separating plates.
  • the downpipes are arranged as a group in the center of the risers.
  • the upper perforated plate has only one passage opening in common for all downpipes.
  • a fluidized bed is formed in the outlet chamber, which widens upwards and to which new solid particles are continuously fed from below through the holes in the upper perforated plate. This leads to a particle transport transversely to the main flow direction of the treated medium in the direction of the passage opening (s).
  • all pipes, including the downpipes are flowed through from bottom to top.
  • the above-mentioned transverse transport of the solid particles in the outlet chamber leads to a particle jam above the freely accessible openings of the downpipes and thus to a pressure build-up. This build-up of pressure slows down and ultimately reverses the flow in the downpipes. This leads to the desired return transport of the solid particles through the downpipes back into the inlet chamber.
  • the top perforated plate ensures a very stable internal circulation of the solid particles.
  • a particular advantage of the invention lies in the fact that it is very simple in terms of construction and manufacturing technology and that mechanical machining of the upper tube plate and the upper perforated plate is not necessary beyond the introduction of the holes or the holes.
  • the distance between the upper perforated plate and the upper tube sheet is between 1 and 5 times the diameter of the heat exchanger tubes, because in this area the influence of the pulsation in the outlet chamber on the tube flow is sufficiently damped, and that a particle jam in the Pre-chamber formed by tube plate and perforated plate is avoided.
  • An advantageous embodiment of the invention provides before, dimension the holes in the upper perforated plate so that a flow rate of the treated medium is established in the area of the holes, which is 1.5 times to 5 times the rate of sinking of a single solid particle.
  • the ratio of the diameter of the holes to the inside diameter of the tubes is 0.1 to 1, preferably 0.5 to 1.
  • the device for heat transfer has a housing 1 with an inlet nozzle 2 for the medium to be treated and an outlet nozzle 3 for the medium being treated. Inside the device, vertical risers 6 and downpipes 7 are held between a lower tube sheet 4 and an upper tube sheet 5.
  • the solid particles carried in the circuit by the medium to be treated are designated by 8.
  • Below the lower tube sheet 4 is the inlet chamber 9, in which a baffle plate 10 and a lower perforated plate 11 with holes 12 are arranged.
  • the diameter of the baffle plate 10 which is preferably designed as a dished bottom, is larger than the diameter of the Inlet nozzle 2.
  • the inlet nozzle 2 protrudes into the inlet chamber 9 and, in cooperation with the baffle plate 10, prevents due to the geometric conditions that solid particles 8 can fall out of the heat exchanger downwards.
  • the heat exchanger tubes 6 and 7 project with their lower ends through the lower tube sheet 4 into the part of the inlet chamber 9 lying between this and the lower perforated plate 11, the ends of the downpipes 7 being longer than the ends of the riser tubes 6
  • Baffle plate 10 is arranged between the lower perforated plate 11 and inlet nozzle 2.
  • Above the upper tube sheet 5 and at a defined distance from it is an upper perforated plate 13 with holes 14, which has at least one passage opening 15 for the passage of the return flow.
  • the space formed between the upper tube sheet 5 and the upper perforated plate 13, referred to as the prechamber, is designated 16 and is separated from the passage opening 15 by at least one partition plate 17.
  • the heating or cooling medium is supplied via the supply connection 18, flows around the pipes 6 and 7 and, after heating, cooling or condensation, is removed again from the heat exchange device via the discharge connection 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
EP91103785A 1990-03-31 1991-03-13 Dispositif d'échange de chaleur Expired - Lifetime EP0451518B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191103785T ATE105399T1 (de) 1990-03-31 1991-03-13 Vorrichtung zur waermeuebertragung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4010478 1990-03-31
DE4010478A DE4010478A1 (de) 1990-03-31 1990-03-31 Vorrichtung zur waermeuebertragung

Publications (3)

Publication Number Publication Date
EP0451518A2 true EP0451518A2 (fr) 1991-10-16
EP0451518A3 EP0451518A3 (en) 1992-11-19
EP0451518B1 EP0451518B1 (fr) 1994-05-04

Family

ID=6403530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103785A Expired - Lifetime EP0451518B1 (fr) 1990-03-31 1991-03-13 Dispositif d'échange de chaleur

Country Status (3)

Country Link
EP (1) EP0451518B1 (fr)
AT (1) ATE105399T1 (fr)
DE (2) DE4010478A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002025200A1 (fr) * 2000-09-22 2002-03-28 Klarex Beheer B.V. Dispositif servant a executer une operation physique et/ou chimique tel qu'un echangeur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2906001A1 (de) * 1978-02-16 1979-09-06 Esmil Bv Vorrichtung, insbesondere waermetauscher, zur durchfuehrung von physikalischen und/oder chemischen verfahren
EP0065332A1 (fr) * 1981-05-12 1982-11-24 Esmil B.V. Dispositif et procédé de concentration d'un liquide par évaporation
DE3818819A1 (de) * 1988-06-03 1989-12-14 Krupp Gmbh Vorrichtung zur uebertragung von waerme

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1442783A1 (de) * 1964-02-01 1969-01-09 Meissner Fa Josef Kontaktofen mit Fliessbettkatalysator
NL187770C (nl) * 1980-11-12 1992-01-02 Esmil Bv Doorstroominrichting voor een vloeibaar medium bevattende een fluidiseerbare korrelmassa.
DE3248502A1 (de) * 1982-12-29 1984-07-05 Basf Ag, 6700 Ludwigshafen Verfahren zur temperierung einer in einem rohrreaktor in form eines festbettes angeordneten schuettung und eine anordnung zur durchfuehrung des verfahrens
DE3831385C2 (de) * 1988-09-15 1997-06-12 Sgl Technik Gmbh Verfahren und Vorrichtung zum Betreiben eines Rohrbündel-Apparates

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2906001A1 (de) * 1978-02-16 1979-09-06 Esmil Bv Vorrichtung, insbesondere waermetauscher, zur durchfuehrung von physikalischen und/oder chemischen verfahren
EP0065332A1 (fr) * 1981-05-12 1982-11-24 Esmil B.V. Dispositif et procédé de concentration d'un liquide par évaporation
DE3818819A1 (de) * 1988-06-03 1989-12-14 Krupp Gmbh Vorrichtung zur uebertragung von waerme

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002025200A1 (fr) * 2000-09-22 2002-03-28 Klarex Beheer B.V. Dispositif servant a executer une operation physique et/ou chimique tel qu'un echangeur
US7141219B1 (en) 2000-09-22 2006-11-28 Klarex Beheer B.V. Apparatus for carrying out a physical and/or chemical process, such as heat exchanger

Also Published As

Publication number Publication date
DE59101536D1 (de) 1994-06-09
EP0451518B1 (fr) 1994-05-04
EP0451518A3 (en) 1992-11-19
DE4010478A1 (de) 1991-10-02
ATE105399T1 (de) 1994-05-15

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