EP0088638A2
Expired / Lapsed
EP
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Distributor for a fluidized bed reactor
Assignee: Montedison SpA
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Filing: 1983-03-09
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Granted: —
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Expires: 2003-03-09
Abstract
Abstract A fluidized bed reactor (1), suitable for recycling a fluidization gas containing in suspension particles of solid material, has a gas distributor (13) consisting of a double-coned body or of a series of concentric cones provided on their lateral surfaces with ribs or fins (18) forming gas inflow channels (19) shaped in such a way and with such an inclination as to allow the passage of the solid particles dragged along by the gas flow, and such as to hinder the outflow of the solid material that has been fluidized, when the flow of the gas is interrupted.
Inventors
- 👤 Gabriele Govoni
- 👤 Canzio Corazzari
- 👤 Giovanni Di Stefano
- 👤 Mauro Loconsolo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 16:34
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01J8/1827; C; C08; C08F; C08F10/00; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00265; B01J2208/00274; B01J2219/00; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1946
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
209 words
A distributor(13) of fluidization gases for a fluidized bed reactor, characterized by comprising a double cone body comprising : (a) a lower conical element(17), arranged in use with the vertex thereof directed downwards, provided with more than two ribs(18) on the lateral surface thereof, the said ribs having such a profile as to form, together with the wall of a containing shell for the distributor, flow channels(19) having a decreasing cross--section in an upward direction so that the velocity of gas flowing therealong will increase gradually and correspondingly, the ribs being arranged diametrically opposite to each other with an axial symmetry and with an inclination with respect to the vertical such as to impart to the inflowing gas current a tangential component, the profile and inclination of the ribs being such as to allow the passage of solid particles entrained by the inflowing gas, and such as to hinder the falling back of the particles of the fluidized bed whenever the feeding in of the gas is interrupted; and (b) an upper conical element(20), arranged in use with the vertex thereof directed upwards, superimposed onto the lower conical element and having the function of activating the circulation of the solid in the fluidized bed, eliminating dead or stagnation zones.
Claim 2
Dependent Claim
209 words
A distributor(13) of fluidization gases for a fluidized bed reactor, characterized by comprising a double cone body comprising : (a) a lower conical element(17), arranged in use with the vertex thereof directed downwards, provided with more than two ribs(18) on the lateral surface thereof, the said ribs having such a profile as to form, together with the wall of a containing shell for the distributor, flow channels(19) having a decreasing cross--section in an upward direction so that the velocity of gas flowing therealong will increase gradually and correspondingly, the ribs being arranged diametrically opposite to each other with an axial symmetry and with an inclination with respect to the vertical such as to impart to the inflowing gas current a tangential component, the profile and inclination of the ribs being such as to allow the passage of solid particles entrained by the inflowing gas, and such as to hinder the falling back of the particles of the fluidized bed whenever the feeding in of the gas is interrupted; and (b) an upper conical element(20), arranged in use with the vertex thereof directed upwards, superimposed onto the lower conical element and having the function of activating the circulation of the solid in the fluidized bed, eliminating dead or stagnation zones.
Claim 3
Dependent Claim
26 words
A distributor as claimed in Claim 1, characterized in that the said cone body is provided with an. axial discharging duct(21) for the fluidized solid material.
Claim 4
Dependent Claim
26 words
A distributor as claimed in Claim 1 or 2, characterized in that the said cone body comprises concentric conical elements each having a series of ribs.
Claim 5
Dependent Claim
56 words
A fluidized bed reactor(l) characterized by being provided with a distributor(13) as claimed in any preceding claim and by further comprising means for the recycling of the gas, and further characterized in that the said distributor and the said recycling means allow the passage of solid particles of the fluidized material entrained by the recycling gas..
Claim 6
Dependent Claim
17 words
A fluidized bed reactor as claimed in Claim 4, characterized by being provided with a centrifugal separator.
Claim 7
Dependent Claim
40 words
A fluidized bed reactor as claimed in Claim 4 or 5, characterized in that the distributor is arranged eccentrically with respect to the vertical axis of the reactor, and in that the reactor further comprises means(29) for rotating the distributor.
Claim 8
Dependent Claim
44 words
A process for the polymerization and copolymerization of α-olefins in a gaseous phase, on a fluidized bed comprising polymerized material containing catalyst, characterized in that the process is carried out in a fluidized bed reactor as claimed in any of Claims 4 to 6.
Claim 9
Dependent Claim
53 words
A process for the copolymerization of ethylene/ /propylene in a gaseous phase, on a fluidized bed comprising polymerized material containing catalyst, under such processing conditions as to obtain an amorphous copolymer, characterized in that the process is carried out in a fluidized bed reactor as claimed in any of Claims 4 to 6.
References Cited (Backward Citations)
No citation records indexed.
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