Cyclone performance and optimization

Technical Report · Wed Mar 15 04:00:00 EST 1989

OSTI ID:5631026

Leith, D

The objectives of this project are: to characterize the gas flow pattern within cyclones, to revise the theory for cyclone performance on the basis of these findings, and to design and test cyclones whose dimensions have been optimized using revised performance theory. This work is important because its successful completion will aid in the technology for combustion of coal in pressurized, fluidized beds. This quarter, we have been hampered somewhat by flow delivery of the bubble generation system and arc lighting system placed on order last fall. This equipment is necessary to map the flow field within cyclones using the techniques described in last quarter's report. Using the bubble generator, we completed this quarter a study of the natural length'' of cyclones of 18 different configurations, each configuration operated at five different gas flows. Results suggest that the equation by Alexander for natural length is incorrect; natural length as measured with the bubble generation system is always below the bottom of the cyclones regardless of the cyclone configuration or gas flow, within the limits of the experimental cyclones tested. This finding is important because natural length is a term in equations used to predict cyclone efficiency. 1 tab.

• Research Organization: North Carolina Univ., Chapel Hill, NC (USA). Dept. of Environmental Sciences and Engineering
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: FG22-87PC79922
• OSTI ID: 5631026
• Report Number(s): DOE/PC/79922-T9; ON: DE91015247
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
BUBBLES
CARBONACEOUS MATERIALS
COAL
COMBUSTION PRODUCTS
CONCENTRATORS
CONTROL
CYCLONE SEPARATORS
DIMENSIONS
DOCUMENT TYPES
EFFICIENCY
ENERGY SOURCES
EQUIPMENT
FLUID FLOW
FOSSIL FUELS
FUELS
GAS FLOW
INERTIAL SEPARATORS
LENGTH
MATERIALS
MEASURING METHODS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PROGRESS REPORT
SEPARATION EQUIPMENT