EP0097332B1 - Echangeur de chaleur à lit fluidisé - Google Patents

Echangeur de chaleur à lit fluidisé Download PDF

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Publication number
EP0097332B1
EP0097332B1 EP19830105890 EP83105890A EP0097332B1 EP 0097332 B1 EP0097332 B1 EP 0097332B1 EP 19830105890 EP19830105890 EP 19830105890 EP 83105890 A EP83105890 A EP 83105890A EP 0097332 B1 EP0097332 B1 EP 0097332B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
fluidised bed
bed according
gridirons
several preceding
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.)
Expired
Application number
EP19830105890
Other languages
German (de)
English (en)
Other versions
EP0097332A2 (fr
EP0097332A3 (en
Inventor
Hermann Dr. Ing. Möller
Jürgen Pust
Gert Grabler
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.)
Johannes Moeller Hamburg GmbH and Co KG
Original Assignee
Johannes Moeller Hamburg GmbH and Co KG
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 Johannes Moeller Hamburg GmbH and Co KG filed Critical Johannes Moeller Hamburg GmbH and Co KG
Publication of EP0097332A2 publication Critical patent/EP0097332A2/fr
Publication of EP0097332A3 publication Critical patent/EP0097332A3/de
Application granted granted Critical
Publication of EP0097332B1 publication Critical patent/EP0097332B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/16—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material forming a bed, e.g. fluidised, on vibratory sieves

Definitions

  • the invention relates to a fluidized bed heat exchanger for flowable bulk materials, with a container for the bulk material, which is provided with an air-permeable inflow base, and with a controllable device for supplying the material.
  • a fluidized bed heat exchanger is used for heat recovery in connection with the cooling of a bulk material or for heating a bulk material for the purpose of easier further processing.
  • a heat exchanger is used in particular as a cooler for the ashes in a power plant or for the cooling of another fluidizable bulk material such as a building material such as lime, gypsum or cement.
  • the heat exchange takes place through the flow through the bulk material with a gas, in particular air, which is either heated by the hot bulk material and thereby dissipates the heat or which is supplied with the bulk material in a hot state in order to heat it up.
  • Such a heat exchanger is known from US-A-3 401 465.
  • Rotating distributor plates are arranged above the inflow floor.
  • the object of the invention is to provide a fluidized bed heat exchanger which enables a particularly high heat transfer between fluidizing gas and bulk material with small structural dimensions and thus only a short residence time of the bulk material in the heat exchanger.
  • gratings are arranged above the inflow floor. Such gratings prevent the formation of air channels in the Wirbelschidt, particularly in the treatment of poorly flowable bulk goods such as gypsum, lime and similar materials, through which the introduced air flows without swirling the material. If gratings are arranged above the inflow floor, which are rotatably or horizontally movable back and forth and are connected together with a motor-driven shaft, the back and forth movement of such gratings above the inflow floor allows the formation of the undesired channels in a horizontal plane avoid to a particularly high degree. Gratings can also be arranged one above the other in the event that the bed height of the fluidized bed is relatively large. In such cases, the driving forces for the movement of the gratings are relatively small, since the fluidized bed during the fluidization has physical properties that are similar to those of a liquid and thus only offers little resistance to the movement of the gratings.
  • the controllable material removal device advantageously has a height-adjustable baffle, which can be adjusted by a motor if necessary, in order to be able to regulate the bed height of the fluidized bed of the fluidized bed and thus also the residence time of the bulk material in the heat exchanger.
  • the container is provided at the outlet with a pre-deduster, which is connected via a discharge line to a conveying line behind the material removal device, so that the separated fine parts only the material flow is supplied again when or after leaving the container. This also results in a pre-cleaning of the gas, which can then be fed to a filter for its final cleaning.
  • the container is sub-divided into chambers under the inflow floor, which are to be charged with air differently. This allows, for example, more air to be introduced into the bulk material at the beginning of the fluidized bed than at the outlet of the container in view of the fact that the material adheres more closely to one another at the entrance or at the beginning of the fluidized bed than during the further distance.
  • the inflow floor does not need to be inclined, because if more bulk material is entered on the input side of the container than has previously emerged on the output side and consequently the height of the fluidized bed on the input side is greater, then the bulk material flows according to a liquid on the horizontal bottom through the container. Nevertheless, it can be useful if the inclination of the bottom can be adjusted, for example in order to be able to completely empty the container when necessary or to take into account the particular degree of flowability of a material.
  • the fluidized bed heat exchanger shown in FIG. 1 for flowable bulk materials has a box-shaped container 25 which is provided with a material supply device 1 on the inlet side for the bulk material to be fluidized. This has a lock wheel via which the material to be processed is metered into the container 25 in accordance with the arrow.
  • the metering wheel can be controlled by a motor «M.
  • the bulk material arrives on an air-permeable inflow floor 3, which is made of a porous material such as sintered metal, or for example of a fabric which, although it allows air to pass through, prevents the bulk material from falling through the floor.
  • a porous material such as sintered metal, or for example of a fabric which, although it allows air to pass through, prevents the bulk material from falling through the floor.
  • the bulk height “H is adjustable by means of a baffle wall 2, which is also adjustable in height by means of a controllable motor M. Behind this baffle 2 there is a discharge line 26 on the discharge side of the container 25, from which the cooled or heated bulk material is led out according to the arrow for its further use.
  • air is introduced via a manifold 22 into the chambers below the inflow floor 3, which passes through the upstream floor 3 and causes the swirling of the bulk material.
  • the space under the inflow floor 3 is divided into three chambers 13, 14 and 15, which are of different sizes. There is the possibility of generating a higher air pressure in the chamber 13 than, for example, in the chamber 15, in order to achieve a greater loosening at the beginning of the flow path than is subsequently necessary.
  • inflow floor 3 which is air-permeable due to its special nature, it can also be made continuously air-impermeable and can be penetrated by tubes which carry nozzles 18 and 19 above the floor for blowing in the air, as is shown, for example, in the right part of FIG.
  • the embodiment according to FIG. 1 it is provided to arrange a horizontally lying perforated plate 8 above the inflow floor 3 in the entrance area, which is designed in the manner of a grating and can be pivoted back and forth to the side.
  • the grating 8 hangs on rods 12, which are fastened to a slide bearing 9 and can be set into a reciprocating pivoting movement via a shaft 10 driven by a motor M, via a cam 11, as can be seen particularly clearly in FIG. 5 is.
  • the gas used either cools the material when it is hot or warms it when the material is cold and the gas is hot. In both possible cases. a fine-grained portion of the bulk material is regularly taken away from the gas.
  • a calming section in the manner of a riser pipe 5 is provided on the outlet side of the container 25, which ends in a pre-deduster 4, which is funnel-shaped.
  • An exhaust line 24 leads away from this deduster for the removal of the gas.
  • the separated fine-grained dust is discharged into the discharge line 26 through a discharge member designed as a lock 6 and a discharge line 6 'behind the outlet of the container.
  • the container 25 is subdivided by baffles 7, which are located at the same distance from one another in the container and thereby divide them into chambers of the same size and interconnected, as can be seen particularly clearly in FIG.
  • baffles 7 which are located at the same distance from one another in the container and thereby divide them into chambers of the same size and interconnected, as can be seen particularly clearly in FIG.
  • two walls 16 are provided which are parallel to one another but run obliquely to the side walls of the container.
  • the chambers behind the guide walls 16 can be used for the flow of a heating or cooling agent, so that the guide walls 16 are additionally cooled or heated. This also applies to the arrangement according to FIG. 4, in which the guide walls 17 are designed in an arc shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (9)

1. Echangeur de chaleur à lit fluidisé pour matières en vrac fluides comportant un réservoir pour les marchandises en vrac pourvu d'un fond de soufflage perméable à l'air ainsi que d'un dispositif réglable pour l'amenée des marchandises, caractérisé en ce que des caillebotis (8, 20, 21) sont placés au-dessus du fond de soufflage (3).
2. Echangeur de chaleur à lit fluidisé selon la revendication 1, caractérisé en ce que les caillebotis (8, 20, 21) sont rotatifs ou animés d'un mouvement de va-et-vient horizontal.
3. Echangeur de chaleur à lit fluidisé selon la revendication 2, caractérisé en ce que les caillebotis (8, 20, 21) sont reliés à un arbre (10) entraîné par un moteur.
4. Echangeur de chaleur à lit fluidisé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que plusieurs caillebotis (20, 21) sont placés l'un au-dessus de l'autre.
5. Echangeur de chaleur à lit fluidisé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que des caillebotis (8, 21) sont situés à même hauteur l'un derrière l'autre.
6. Echangeur de chaleur à lit fluidisé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'un dispositif réglable de prélèvement de marchandises (2) présente une paroi de retenue à hauteur variable.
7. Echangeur de chaleur à lit fluidisé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le réservoir est subdivisé en dessous du fond de soufflage (3) en chambres (13, 14, 15) qui sont différemment chargées d'air.
8. Echangeur de chaleur à lit fluidisé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'inclinaison du fond de soufflage (3) est réglable.
9. Echangeur de chaleur à lit fluidisé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la sortie du réservoir (25) est pourvue d'un dépoussiéreur préalable (4) qui est relié par un conduit d'évacuation (6') à un conduit de transport (26) derrière le dispositif de prélèvement de marchandises.
EP19830105890 1982-06-19 1983-06-16 Echangeur de chaleur à lit fluidisé Expired EP0097332B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3223047 1982-06-19
DE19823223047 DE3223047C2 (de) 1982-06-19 1982-06-19 Fließbett-Wärmetauscher

Publications (3)

Publication Number Publication Date
EP0097332A2 EP0097332A2 (fr) 1984-01-04
EP0097332A3 EP0097332A3 (en) 1984-05-02
EP0097332B1 true EP0097332B1 (fr) 1985-10-09

Family

ID=6166432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830105890 Expired EP0097332B1 (fr) 1982-06-19 1983-06-16 Echangeur de chaleur à lit fluidisé

Country Status (2)

Country Link
EP (1) EP0097332B1 (fr)
DE (1) DE3223047C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3223047A1 (de) * 1982-06-19 1983-12-22 Johannes Möller Hamburg GmbH & Co KG, 2000 Hamburg Wirbelschicht-waermeaustauscher

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1074977A (en) * 1913-10-07 Peter Provost Grain-drier.
DE900578C (de) * 1950-07-20 1953-12-28 Aluminium Lab Ltd Verfahren und Vorrichtung zum Waermeaustausch zwischen staubfoermigen und fluessigenStoffen
GB736036A (en) * 1952-01-23 1955-08-31 Aluminium Lab Ltd Method and apparatus for the treatment of finely divided fluidizable solid material
DE1010460B (de) * 1953-10-21 1957-06-13 Hermann Orth In Vor- und Fertigtrockner unterteilter Wirbelbettrockner
NL203077A (fr) * 1955-01-14
DE1205565B (de) * 1961-02-14 1965-11-25 Lambert Freres & Cie Verfahren zum Herbeifuehren eines Waerme-austausches ueber Trennflaechen zwischen Stroemungsmedien einerseits und koernigen oder staubfoermigen Materialien andererseits
US3119605A (en) * 1961-06-30 1964-01-28 Berz Wolfgang Process and device for preheating pulverulent material
FR1345666A (fr) * 1962-10-19 1963-12-13 Neyrpic Ets Perfectionnements aux échangeurs de chaleur utilisant le procédé de fluidisation
US3169381A (en) * 1964-04-13 1965-02-16 Frigoscandia Ltd Fluidized freezer
US3401465A (en) * 1966-12-23 1968-09-17 Nat Lead Co Means for cooling solid particulate materials with fluids
US3546787A (en) * 1968-08-30 1970-12-15 Fuller Co Fluidized bed cooler
DE1909039B2 (de) * 1969-02-22 1973-01-04 Metallgesellschaft Ag, 6000 Frankfurt Wirbelschichtkühler
CH518510A (de) * 1970-01-14 1972-01-31 Buehler Ag Geb Vorrichtung zur kontinuierlichen thermischen Behandlung von körnigem Gut mittels eines Gases
JPS5211322B2 (fr) * 1972-08-28 1977-03-30
DE2337937A1 (de) * 1973-07-26 1975-02-13 Claas Maschf Gmbh Geb Vorrichtung zum kuehlen von halmfutterpresslingen
DD116083A1 (fr) * 1974-04-11 1975-11-05
DE2805397C3 (de) * 1978-02-09 1981-09-10 Werner Glatt Klimaanlagen - Lufttechnischer Apparatebau, 7851 Binzen Wirbelschichtapparatur mit horizontaler Rotorscheibe
GB2024405A (en) * 1978-06-23 1980-01-09 Techne Cambridge Ltd Fluidization apparatus
DE2937065C2 (de) * 1979-09-13 1983-12-29 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zum Behandeln von Schwelrückstand aus der trockenen Destillation von Ölschiefer oder dgl.
JPS5774585A (en) * 1980-10-27 1982-05-10 Kawasaki Heavy Ind Ltd Controlling method of absorbed heat of fluidized bed type heater
DE3223047C2 (de) * 1982-06-19 1986-10-23 Johannes Möller Hamburg GmbH & Co KG, 2000 Hamburg Fließbett-Wärmetauscher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3223047A1 (de) * 1982-06-19 1983-12-22 Johannes Möller Hamburg GmbH & Co KG, 2000 Hamburg Wirbelschicht-waermeaustauscher

Also Published As

Publication number Publication date
EP0097332A2 (fr) 1984-01-04
DE3223047C2 (de) 1986-10-23
EP0097332A3 (en) 1984-05-02
DE3223047A1 (de) 1983-12-22

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