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

Journal Article · Thu Mar 31 23:00:00 EST 1983 · Ind. Eng. Chem. Process Des. Dev.; (United States)

OSTI ID:5952090

Rohargi, N D.T.

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. The agglomerated products are returned to the combustor to improve the calcium utilization of the sorbent and to complete the combustion of elutriated carbon material. In this experimental programme, agglomerates were 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. 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 desulphurization.

• OSTI ID: 5952090
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 22:2; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
014000* -- Coal
Lignite
& Peat-- Combustion
ADSORBENTS
AGGLOMERATION
ASHES
ATMOSPHERIC PRESSURE
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
DESULFURIZATION
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUELS
MATERIALS
MECHANICAL PROPERTIES
OXIDATION
PARTICLE SIZE
PYROLYSIS PRODUCTS
RECYCLING
RESIDUES
SIZE
THERMOCHEMICAL PROCESSES