Development program on pressurized fluidized-bed combustion. Annual report, July 1975--June 1976

Technical Report · Thu Jul 01 04:00:00 EDT 1976

DOI:https://doi.org/10.2172/7146849· OSTI ID:7146849

Vogel, G. J.; Johnson, I.; Cunningham, P. T.

The feasibility of using fluidized-bed combustors in power and steam plants is being evaluated. The concept involves burning fuels such as coal in a fluidized bed of either a limestone (CaCO/sub 3/) or a synthetically prepared calcium-containing stone. The calcium reacts with the sulfur to form CaSO/sub 4/, which remains in the bed, thus decreasing the level of SO/sub 2/ in the flue gas. Levels of NO/sub x/ in the flue gas are low. In a separate step, the CaSO/sub 4/ is regenerated to CaO by reductive decomposition at Ca/sub solar/ 1100/sup 0/C for reuse in the combustor. Progress is reported on the following: the effect of regeneration operating variables on extent of regeneration and SO/sub 2/ concentration in the off-gas using coal as the source of reducing agent and of heat; the alternate combustion and regeneration behavior of stone; the rate and extent of sulfation of agents impregnated on Al/sub 2/O/sub 3/; the effect of variables on sorption and release of sulfur for CaO-impregnated stone; attrition resistance of stone; the kinetic and structural changes occurring during half-calcination of dolomite; the CaS-CaSO/sub 4/ regeneration reaction; and the volatility of trace elements when heating coal ash. Procurement and disposal of regenerated stone, minimum fluidization studies, modeling of a gas-solid combustion reaction and of the regeneration process, combustion studies using different sizes of coal and additive and also using lignite are reported.

• Research Organization: Argonne National Lab., Ill. (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7146849
• Report Number(s): ANL/ES-CEN-1016
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BROWN COAL
BURNERS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SULFATES
CALCIUM SULFIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
CORROSIVE EFFECTS
DENITRIFICATION
DESULFURIZATION
DOLOMITE
ENERGY SOURCES
FLUE GAS
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
FUNCTIONAL MODELS
GASEOUS WASTES
LIGNITE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PILOT PLANTS
POWER PLANTS
REDUCTION
REGENERATION
REMOVAL
RESEARCH PROGRAMS
RESERVOIR ROCK
ROCKS
SORPTION
SULFATES
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
TRACE AMOUNTS
WASTES