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Title: Pressurized reactor system and a method of operating the same

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. Super-atmospheric pressure gas is introduced from the first conduit into the fluidized bed reactor and heat derived reactions such as combustion and gasification 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 asmore » 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. 2 figs.« less
Inventors:
Issue Date:
OSTI Identifier:
251104
Assignee:
A. Ahlstrom Corp., Noormarkku (Finland) PTO; SCA: 421000; 014000; 010404; PA: EDB-96:107695; SN: 96001607240
Patent Number(s):
US 5,526,582/A/
Application Number:
PAN: 8-220,387
Contract Number:
FC21-91MC27364
Resource Relation:
Other Information: PBD: 18 Jun 1996
Research Org:
City of Lakeland
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 01 COAL, LIGNITE, AND PEAT; FLUIDIZED-BED COMBUSTORS; TEMPERATURE CONTROL; GAS GENERATORS; PRESSURIZATION; OPERATION; SHUTDOWN; START-UP