Condensing economizers for small coal-fired equipment

Conference · Fri May 01 00:00:00 EDT 1992

OSTI ID:5061360

Litzke, Wai Lin; Butcher, T A ^[1]; Park, N A ^[2]

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1. Brookhaven National Lab., Upton, NY (United States)
2. Stony Brook Scientific, Ltd., Morristown, PA (United States)

Condensing economizers can be used to increase the thermal efficiency of boilers and furnaces. This study focuses on evaluating indirect contact economizers as applied to heating equipment burning coal-water mixtures although the results can be extended to other fuels. In addition to dry gas sensible heat, latent heat is recovered from flue gas water vapor, improving system efficiency markedly. In addition to improving thermal efficiency, condensing economizers can also capture particulates. In tests to date up to 89% removal has been measured. The primary objectives of this project are to evaluate the most important mechanisms involved in particle capture and to enhance capture in practical systems. The intent of the work is to contribute to the ongoing program at the Department of Energy/Pittsburgh Energy Technology Center in the development of coal-fired combustion equipment. These results are expected to be most applicable to smaller scale equipment, where the low temperature heat from the economizer can be used. The approach involves determining thermal efficiency improvement and particulate removal efficiency (experimental), and developing models capable of predicting system performance under varied operating conditions (theoretical). Gas temperature and condensation profiles through the economizers have been predicted and overall predicted performance are consistent with test results. Mechanisms for particle removal are discussed in this paper and predicted removal efficiencies as a function of particle diameter are presented. 4 refs.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5061360
• Report Number(s): BNL-47610; CONF-920736-2; ON: DE92016932; CNN: AS-295-EECD
• Resource Relation: Conference: Coal preparation, utilization, and environmental control conference, Pittsburgh, PA (United States), 26-31 Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
42 ENGINEERING
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ECONOMIZERS
THERMAL EFFICIENCY
PARTICULATES
REMOVAL
COAL
COGENERATION
COMBUSTION
CONDENSATION CHAMBERS
FURNACES
HEAT EXCHANGERS
HEAT TRANSFER
VAPOR CONDENSATION
WASTE HEAT BOILERS
WASTE HEAT UTILIZATION
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DEUS
EFFICIENCY
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
MATERIALS
OXIDATION
PARTICLES
POWER GENERATION
STEAM GENERATION
THERMOCHEMICAL PROCESSES
WASTE PRODUCT UTILIZATION
014000* - Coal
Lignite
& Peat- Combustion
010800 - Coal
Lignite
& Peat- Waste Management
421000 - Engineering- Combustion Systems
320304 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization