EP0091353B1 - Procédé et dispositif permettant l'élévation et la réalisation d'échanges thermiques sur un matériau pulvérulent présentant une large distribution granulométrique - Google Patents

Procédé et dispositif permettant l'élévation et la réalisation d'échanges thermiques sur un matériau pulvérulent présentant une large distribution granulométrique Download PDF

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Publication number
EP0091353B1
EP0091353B1 EP83400637A EP83400637A EP0091353B1 EP 0091353 B1 EP0091353 B1 EP 0091353B1 EP 83400637 A EP83400637 A EP 83400637A EP 83400637 A EP83400637 A EP 83400637A EP 0091353 B1 EP0091353 B1 EP 0091353B1
Authority
EP
European Patent Office
Prior art keywords
tube
base
column
collector
grate
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
EP83400637A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0091353A1 (fr
Inventor
Frédéric Berckmoes
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.)
Krebs & Co Sa SA
Original Assignee
Krebs & Co Sa SA
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 Krebs & Co Sa SA filed Critical Krebs & Co Sa SA
Priority to AT83400637T priority Critical patent/ATE14924T1/de
Publication of EP0091353A1 publication Critical patent/EP0091353A1/fr
Application granted granted Critical
Publication of EP0091353B1 publication Critical patent/EP0091353B1/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

  • French patent No. 2117314 describes a transport device, with cooling of cement particles; said transport is entirely carried out in apparently identical tubes and by a pneumatic transport tank.
  • the reservoir is provided with an inlet for the product to be cooled and has a porous bottom which is ventilated by means of a connector and which is of convex shape. Through the porous bottom pass a number of compressed air lines which terminate in nozzles above which the tubes open.
  • English Patent No. 1296057 describes a process in which the combustion of a liquid fuel is carried out and the combustion fumes (containing very fine unburnt particles) are sent in a bed composed of fluidized particles.
  • the present invention intends to provide a solution to the problem of upward vertical transport and of a concomitant heat exchange of a pulverulent material having a spread distribution of its particle size.
  • spread distribution of the grain size is meant a wider distribution than that which would be admissible for the pure and simple use of the fluidized bed technique.
  • heat exchange is meant either reheating or, preferably, cooling of the material with essentially the outside.
  • the method consists in carrying out, in the same enclosure, a fluidization of the pulverulent material, this fluidization being ensured up to a certain degree and flight of the part corresponding to said degree of said pulverulent material and a pneumatic drive of the remaining particles from the part bottom of the fluidized bed.
  • the desired heat exchanges are carried out, on the one hand, on the fluidized bed and, on the other hand, on the pneumatic drive.
  • the fluidization of the pulverulent material up to a certain degree in order to ensure the flight of the particles located inside said degree.
  • up to a certain degree it is meant that one will predetermine the proportion of the pulverulent material introduced into the enclosure which will be fluidized and this according to the dimensions of the particles of said pulverulent material.
  • the pulverulent material used has a Gaussian particle size distribution with particles of average dimensions of the order of 0.1 mm and particles of average dimensions of the order of 4 mm, we will decide to carry out the fluidization of all the particles of said material which will have average dimensions of less than 2 mm and a suitable enclosure and a flow rate of gasfluidizing agent will be used for this.
  • said fluidization ensures the flight of said particles.
  • a pneumatic drive device for these large particles is produced from this lower part.
  • This pneumatic drive consists of an open tube into which, thanks to a suitable adjustment, an amount of air is introduced which is sufficient to entrain said large particles.
  • This tube preferably crosses the fluidized bed and emerges from it
  • the present invention therefore relates to a device for raising and cooling a finely divided material, the particle size of which extends over a large range, characterized in that it consists of a column provided at its base with a grid of fluidization, under which is provided a wind box and the upper part of which with a material collector, of an arrival of the material above said grid and of a central transfer tube whose base is located at a certain distance adjustable from a gas injection nozzle in the direction of the tube, said central tube opening into a sensor and auxiliary retarder itself connected to said manifold.
  • the aforesaid nozzle is guided relative to the aforementioned fluidizing grid and constitutes a means of adjusting the distance separating it from the base of the central tube.
  • a perforated plate 2 separates the interior volume 1a from the column of a wind box 3 connected to a source of compressed gas not shown.
  • This perforated plate constitutes a fluidization grid above which, by a conduit 4, the divided product to be raised and cooled is brought.
  • the upper part of column 1 is in communication, not shown, with a manifold 5 located at the desired altitude.
  • This collector can be cyclone or other known type.
  • a transfer tube 6 In the center of column 1, a transfer tube 6 has been placed, the base 6a of which communicates with the internal space 1a of the column. This base 6a is located at a distance d from a nozzle 7 for injecting an air stream into the tube.
  • the upper end 6b of the tube 6 opens into an auxiliary sensor 8 which also acts as a retarder and which is itself connected to the main collector 5.
  • the representation of the nozzle 7 is entirely schematic. It should be easily accessible to adjust said distance d but also its diameter and its location relative to the grid 2. It may also be advantageous for the tube 6 to be movable if one wishes to modify in another way the above distance.
  • annular pipe 9 can be seen, the lower part of which is provided with orifices for spraying a liquid (water) for cooling the wall of the column 1, this water being collected by an annular tank 10 of drainage.
  • Symbol 11 is a cooling device separate from the tube 6.
  • the nozzle 7 can also be supplied by a source of compressed air independent of the wind box.
  • a source of compressed air independent of the wind box.
  • the product brought to the grid 2 being of a particle size distributed in a range (according to a distribution of gauss in particular), the pressure of the wind box is adjusted so that the main part of the grains is transported pneumatically in the column 6 at a speed determined by the cooling rate that is desired.
  • the heaviest particles tend to remain in space 1 a, or even to concentrate at the level of grid 2.
  • the suction effect described above creates a sweeping of this space with sufficient force to entrain these heavy particles which are rapidly propelled into the auxiliary sensor 8.
  • the transfer is carried out at the expense of cooling, which can then be compensated, if necessary, by more vigorous cooling at 11 or by lengthening the length of the transfer channels.
  • the percentage of particles concerned remaining low compared to the total product, the calorific incidence can be neglected.
  • the invention finds an interesting application in the field of treatment of finely divided materials.

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)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Coke Industry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
EP83400637A 1982-04-02 1983-03-28 Procédé et dispositif permettant l'élévation et la réalisation d'échanges thermiques sur un matériau pulvérulent présentant une large distribution granulométrique Expired EP0091353B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83400637T ATE14924T1 (de) 1982-04-02 1983-03-28 Verfahren und vorrichtung zum heben von und zur verwirklichung von waermeaustausch fuer pulverfoermiges material mit einer breiten granulometrischen verteilung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8205806 1982-04-02
FR8205806A FR2524439A1 (fr) 1982-04-02 1982-04-02 Dispositif d'elevation et de refroidissement d'un materiau divise a granulometrie variable

Publications (2)

Publication Number Publication Date
EP0091353A1 EP0091353A1 (fr) 1983-10-12
EP0091353B1 true EP0091353B1 (fr) 1985-08-14

Family

ID=9272719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400637A Expired EP0091353B1 (fr) 1982-04-02 1983-03-28 Procédé et dispositif permettant l'élévation et la réalisation d'échanges thermiques sur un matériau pulvérulent présentant une large distribution granulométrique

Country Status (5)

Country Link
EP (1) EP0091353B1 (enrdf_load_stackoverflow)
AT (1) ATE14924T1 (enrdf_load_stackoverflow)
DE (1) DE3360551D1 (enrdf_load_stackoverflow)
ES (1) ES8404660A1 (enrdf_load_stackoverflow)
FR (1) FR2524439A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104634134B (zh) * 2014-12-10 2016-06-22 新奥科技发展有限公司 流化床冷却器、冷却方法及煤加氢气化系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL87455C (enrdf_load_stackoverflow) * 1953-12-31
DE1082607B (de) * 1956-11-09 1960-06-02 Metallgesellschaft Ag Vorrichtung zum Kuehlen von heissem, kleinstueckigem Gut
FR1350734A (fr) * 1962-12-04 1964-01-31 Perfectionnements aux échangeurs de chaleur
DE1551424A1 (de) * 1967-06-29 1970-10-29 Franz Jos Waeschle Fa Verfahren und Vorrichtung zur Kuehlung pulverfoermigen Gutes
GB1296057A (enrdf_load_stackoverflow) * 1969-07-09 1972-11-15
DE2059575A1 (de) * 1970-12-03 1972-06-15 Polysius Ag Vorrichtung zum Kuehlen von Feingut,insbesondere von Zement
GB1439861A (en) * 1973-05-08 1976-06-16 Atomic Energy Authority Uk Fluidised bed apparatus

Also Published As

Publication number Publication date
FR2524439A1 (fr) 1983-10-07
FR2524439B1 (enrdf_load_stackoverflow) 1984-07-13
ES521075A0 (es) 1984-05-16
EP0091353A1 (fr) 1983-10-12
ES8404660A1 (es) 1984-05-16
ATE14924T1 (de) 1985-08-15
DE3360551D1 (en) 1985-09-19

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