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:
-
- Karhula, FI
- Issue Date:
- Research Org.:
- City of Lakeland
- OSTI Identifier:
- 870038
- Patent Number(s):
- 5443806
- Assignee:
- A. Ahlstrom Corporation (Noormarkku, FI)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23J - REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES
- 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 = {Sun Jan 01 00:00:00 EST 1995},
month = {Sun Jan 01 00:00:00 EST 1995}
}