Determination of boiler efficiency for fluidized bed steam generators

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6129584

Bersani, A A; Garver, D L; Sinn, B T

Fluidized bed combustion steam generators are inherently different from conventional combustion systems. This paper presents suggested methods to account for these differences when determining boiler efficiency by the heat loss method. Operating data from an operating fluidized bed boiler plant are presented. The combustion process takes place in a bed of inert ash particles that are fluidized by combustion air. The fluidizing blower increases the combustion air temperature due to the adiabatic heat of compression and frictional heat. Methods of accounting for the fan horsepower and the heat of compression in the boiler efficiency are discussed. The ash streams generated in fluidized bed combustion are usually greater than in conventional combustion because sorbent material is usually employed to capture sulfur dioxide and because fuels containing high ash levels are very often burned in the fluidized bed. Methods of determining ash specific heat and total sensible heat of these ash streams are presented.

• OSTI ID: 6129584
• Report Number(s): CONF-8510437-
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
ADSORBENTS
AIR POLLUTION CONTROL
ASHES
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CONTROL
COMBUSTORS
CONTROL
DESULFURIZATION
EFFICIENCY
EQUIPMENT
FLUE GAS
FLUIDIZED-BED COMBUSTION
GASEOUS WASTES
IN-SITU PROCESSING
OPERATION
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PROCESSING
REMOVAL
RESIDUES
SCRUBBERS
SCRUBBING
STEAM GENERATORS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL EFFICIENCY
THERMOCHEMICAL PROCESSES
THERMODYNAMICS
VAPOR GENERATORS
WASTES