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Title: Treating exhaust gas from a pressurized fluidized bed reaction system

Abstract

Hot gases from a pressurized fluidized bed reactor system are purified. Under superatmospheric pressure conditions hot exhaust gases are passed through a particle separator, forming a flitrate cake on the surface of the separator, and a reducing agent--such as an NO.sub.x reducing agent (like ammonia), is introduced into the exhaust gases just prior to or just after particle separation. The retention time of the introduced reducing agent is enhanced by providing a low gas velocity (e.g. about 1-20 cm/s) during passage of the gas through the filtrate cake while at superatmospheric pressure. Separation takes place within a distinct pressure vessel the interior of which is at a pressure of about 2-100 bar, and-introduction of reducing agent can take place at multiple locations (one associated with each filter element in the pressure vessel), or at one or more locations just prior to passage of clean gas out of the pressure vessel (typically passed to a turbine).

Inventors:
 [1];  [1]
  1. (Karhula, FI)
Issue Date:
Research Org.:
City of Lakeland
OSTI Identifier:
870038
Patent Number(s):
5443806
Assignee:
A. Ahlstrom Corporation (Noormarkku, FI) NETL
DOE Contract Number:  
FC21-91MC27364
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
treating; exhaust; gas; pressurized; fluidized; bed; reaction; hot; gases; reactor; purified; superatmospheric; pressure; conditions; passed; particle; separator; forming; flitrate; cake; surface; reducing; agent-such; agent; ammonia; introduced; prior; separation; retention; time; enhanced; providing; velocity; 1-20; cm; passage; filtrate; takes; distinct; vessel; interior; 2-100; bar; and-introduction; multiple; locations; associated; filter; element; clean; typically; turbine; clean gas; pressure conditions; pressurized fluidized; bed reactor; filter element; exhaust gases; pressure vessel; fluidized bed; atmospheric pressure; hot gas; reducing agent; pressurized fluid; exhaust gas; superatmospheric pressure; gas velocity; hot gases; bed reaction; particle separation; retention time; particle separator; hot exhaust; /423/55/110/122/422/431/

Citation Formats

Isaksson, Juhani, and Koskinen, Jari. Treating exhaust gas from a pressurized fluidized bed reaction system. United States: N. p., 1995. Web.
Isaksson, Juhani, & Koskinen, Jari. Treating exhaust gas from a pressurized fluidized bed reaction system. United States.
Isaksson, Juhani, and Koskinen, Jari. Sun . "Treating exhaust gas from a pressurized fluidized bed reaction system". United States. https://www.osti.gov/servlets/purl/870038.
@article{osti_870038,
title = {Treating exhaust gas from a pressurized fluidized bed reaction system},
author = {Isaksson, Juhani and Koskinen, Jari},
abstractNote = {Hot gases from a pressurized fluidized bed reactor system are purified. Under superatmospheric pressure conditions hot exhaust gases are passed through a particle separator, forming a flitrate cake on the surface of the separator, and a reducing agent--such as an NO.sub.x reducing agent (like ammonia), is introduced into the exhaust gases just prior to or just after particle separation. The retention time of the introduced reducing agent is enhanced by providing a low gas velocity (e.g. about 1-20 cm/s) during passage of the gas through the filtrate cake while at superatmospheric pressure. Separation takes place within a distinct pressure vessel the interior of which is at a pressure of about 2-100 bar, and-introduction of reducing agent can take place at multiple locations (one associated with each filter element in the pressure vessel), or at one or more locations just prior to passage of clean gas out of the pressure vessel (typically passed to a turbine).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

Patent:

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