US 5,476,639 AGranted

Fluidized bed reactor system and a method of manufacturing the same

AssigneeA. Ahlstrom Corporation

InventorTimo Hyppanen

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Abstract

A fluidized bed reactor system, including a reactor chamber defined by a wall structure formed by a plurality of tubes through which a heat transfer medium circulates, is constructed so as to provide numerous advantages over conventional constructions. A fast fluidized bed of solid material is established in the reactor chamber. A solid material processing chamber is disposed adjacent the reactor chamber on the outer side of a wall structure defining the reactor chamber, e.g. for recovering heat from the solid material. The processing chamber shares a common wall portion with the reactor chamber and a slow fluidized bed of solid material is provided in the processing chamber. Particle passage openings are provided in the common wall. Particles from the processing chamber are recirculated to the reactor chamber after treatment (typically cooling). A robust common wall structure is provided between the processing chamber and the reactor chamber, which has adequate open area for circulation of particles into the processing chamber, yet can substantially solely support the processing chamber.

Claims20

Dependent claims

A fluidized bed reactor system, including:

a reactor chamber defined by a structural wall formed by a plurality of tubes of heat conductive material, heat transfer fluid passing through said tubes to cool said tubes;
a fast fluidized bed of particles in said reactor chamber;
a particle processing chamber disposed adjacent to said reactor chamber on the opposite side of said structural wall from said reactor chamber;
said particle processing chamber including a wall portion of said structural wall common to said reactor chamber and said particle processing chamber, said common wall portion being substantially planar, and formed of consecutive first and second portions each comprising vertical tubes of heat conductive material connected together by solid heat conducting material fins, said first portion of tubes at said common wall portion being bent out of the plane of said substantially planar common wall portion and away from said reactor chamber;
a slow fluidized bed of particles in said processing chamber;
and
said common wall portion including at least two inlet openings formed therein for providing the passage of particles from said reactor chamber to said processing chamber, said inlet openings formed in said second portion tubes, which second portion tubes are in the plane of said substantially planar common wall portion.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/222,862Filed 5 Apr 1994 · continuation in part
Priority: 15 Apr 1993
Granted: 19 Dec 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B01J 8/26
According to "fluidised-bed" technique: with two or more fluidised beds, e.g. reactor and regeneration installations
B01J 8/1836
With fluidised particles: heating and cooling the reactor
B01J 8/388
Being subject to a circulatory movement only: externally, i.e. the particles leaving the vessel and subsequently re-entering it
F22B 31/0084
With combustion in a fluidized bed: with recirculation of separated solids or with cooling of the bed particles outside the combustion bed