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Title: Flue gas desulfurization method and apparatus

Abstract

A combined furnace limestone injection and dry scrubber flue gas desulfurization (FGD) system collects solids from the flue gas stream in first particulate collection device located downstream of an outlet of a convection pass of the furnace and upstream of the dry scrubber. The collected solids are diverted to the dry scrubber feed slurry preparation system to increase sulfur oxide species removal efficiency and sorbent utilization. The level of lime in the feed slurry provided to the dry scrubber is thus increased, which enhances removal of sulfur oxide species in the dry scrubber. The decreased particulate loading to the dry scrubber helps maintain a desired degree of free moisture in the flue gas stream entering the dry scrubber, which enhances sulfur oxide species removal both in the dry scrubber and downstream particulate collector, normally a baghouse. 5 figs.

Inventors:
;
Issue Date:
Research Org.:
Babcock and Wilcox Co
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
672664
Patent Number(s):
5,795,548
Application Number:
PAN: 8-611,605
Assignee:
McDermott Technology, Inc., New Orleans, LA (United States) PTO; SCA: 540120; 010800; PA: EDB-98:121359; SN: 98002026887
DOE Contract Number:  
AC22-92PC92160
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 18 Aug 1998
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; FLUE GAS; DESULFURIZATION; SORBENT INJECTION PROCESSES; DRY SCRUBBERS; SULFUR DIOXIDE; AIR POLLUTION CONTROL; BAGHOUSES; LIMESTONE; PARTICULATES; OPERATION

Citation Formats

Madden, D.A., and Farthing, G.A. Flue gas desulfurization method and apparatus. United States: N. p., 1998. Web.
Madden, D.A., & Farthing, G.A. Flue gas desulfurization method and apparatus. United States.
Madden, D.A., and Farthing, G.A. Tue . "Flue gas desulfurization method and apparatus". United States.
@article{osti_672664,
title = {Flue gas desulfurization method and apparatus},
author = {Madden, D.A. and Farthing, G.A.},
abstractNote = {A combined furnace limestone injection and dry scrubber flue gas desulfurization (FGD) system collects solids from the flue gas stream in first particulate collection device located downstream of an outlet of a convection pass of the furnace and upstream of the dry scrubber. The collected solids are diverted to the dry scrubber feed slurry preparation system to increase sulfur oxide species removal efficiency and sorbent utilization. The level of lime in the feed slurry provided to the dry scrubber is thus increased, which enhances removal of sulfur oxide species in the dry scrubber. The decreased particulate loading to the dry scrubber helps maintain a desired degree of free moisture in the flue gas stream entering the dry scrubber, which enhances sulfur oxide species removal both in the dry scrubber and downstream particulate collector, normally a baghouse. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {8}
}