Agglomeration of sorbent and ash carry-over for use in atmospheric fluidized-bed combustors

Journal Article · Fri Apr 01 00:00:00 EST 1983 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200021a015· OSTI ID:5708155

Rohatgi, N D.T.; Kealrns, D L; Newby, R A; Ulerich, N H

Agglomeration of elutriated sorbent, ash, and char from a fluidized-bed boiler, with spent bed overflow material and water, has been identified as a potentially attractive technique for reducing sorbent consumption in atmospheric fluidized-bed combustors (AFBC). The agglomerated products are returned to the combustor to improv the calcium utilization of the sorbent and to complete the combustion of elutriated carbon material. In this experimental program, agglomerates were formed from Babcock and Wilcox (BandW) raw materials (Carbon limestone, spent bed overflow, cyclone and baghouse catch) collected during test runs on the 1.8 m X 1.8 m fluidized-bed combustor. Agglomerate characteristics, such as handling strength, sulfur capture activity, carbon utilization, and resistance to attrition, were determined as functions of agglomeration processing variables. These variables include feed composition, feed particle size, amount of water addition, curing time, and curing atmosphere or drying conditions. Calcium-to-sulfur (Ca/S) feed ratio requirements for a commercial AFBC that uses the agglomeration process were projected on the basis of the Westinghouse model for fluidized-bed desulfurization.

• Research Organization: Westinghouse Research and Development Center, Pittsburgh, Pennsylvania 15235
• OSTI ID: 5708155
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Vol. 22:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
42 ENGINEERING
FLUIDIZED-BED COMBUSTORS
ADSORBENTS
AGGLOMERATION
ASHES
BOILERS
CALCIUM
CARBON
DESULFURIZATION
DRYING
RAW MATERIALS
ALKALINE EARTH METALS
CHEMICAL REACTIONS
COMBUSTORS
ELEMENTS
MATERIALS
METALS
NONMETALS
RESIDUES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry
421000 - Engineering- Combustion Systems