Pressurized reactor system and a method of operating the same

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870469

Isaksson, Juhani M ^[1]

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1. Karhula, FI

A method and apparatus are provided for operating a pressurized reactor system in order to precisely control the temperature within a pressure vessel in order to minimize condensation of corrosive materials from gases on the surfaces of the pressure vessel or contained circulating fluidized bed reactor, and to prevent the temperature of the components from reaching a detrimentally high level, while at the same time allowing quick heating of the pressure vessel interior volume during start-up. Superatmospheric pressure gas is introduced from the first conduit into the fluidized bed reactor and heat derived reactions such as combustion and gassification are maintained in the reactor. Gas is exhausted from the reactor and pressure vessel through a second conduit. Gas is circulated from one part of the inside volume to another to control the temperature of the inside volume, such as by passing the gas through an exterior conduit which has a heat exchanger, control valve, blower and compressor associated therewith, or by causing natural convection flow of circulating gas within one or more generally vertically extending gas passages entirely within the pressure vessel (and containing heat exchangers, flow rate control valves, or the like therein). Preferably, inert gas is provided as a circulating gas, and the inert gas may also be used in emergency shut-down situations. In emergency shut-down reaction gas being supplied to the reactor is cut off, while inert gas from the interior gas volume of the pressure vessel is introduced into the reactor.

• Research Organization: City of Lakeland
• DOE Contract Number: FC21-91MC27364
• Assignee: A. Ahlstrom Corporation (Noormarkku, FI)
• Patent Number(s): US 5526582
• OSTI ID: 870469
• Country of Publication: United States
• Language: English

Related Subjects

pressurized
reactor
method
operating
apparatus
provided
precisely
control
temperature
pressure
vessel
minimize
condensation
corrosive
materials
gases
surfaces
contained
circulating
fluidized
bed
prevent
components
reaching
detrimentally
level
time
allowing
quick
heating
interior
volume
start-up
superatmospheric
gas
introduced
conduit
heat
derived
reactions
combustion
gassification
maintained
exhausted
circulated
inside
passing
exterior
exchanger
valve
blower
compressor
associated
therewith
causing
natural
convection
flow
vertically
extending
passages
entirely
containing
exchangers
rate
valves
therein
preferably
inert
emergency
shut-down
situations
reaction
supplied
cut
natural convection
circulating fluid
vertically extending
control valves
gas volume
reaction gas
bed reactor
pressure gas
pressure vessel
heat exchange
fluidized bed
heat exchanger
flow rate
inert gas
heat exchangers
atmospheric pressure
control valve
superatmospheric pressure
associated therewith
time allowing
pressurized reactor
corrosive materials
rate control
circulating gas
circulating fluidized
interior gas
precisely control
convection flow
corrosive material
containing heat
/34/60/110/