Confined vortex scrubber

Technical Report · Sun Jul 01 00:00:00 EDT 1990

DOI:https://doi.org/10.2172/5789445· OSTI ID:5789445

The program objective is to demonstrate efficient removal of fine particulates to sufficiently low levels to meet proposed small scale coal combustor emission standards using a cleanup technology appropriate to small scale coal combustors. This to be accomplished using a novel particulate removal device, the Confined Vortex Scrubber (CVS), which consists of a cylindrical vortex chamber with tangential flue gas inlets. The clean gas exit is via vortex finder outlets, one at either end of the tube. Liquid is introduced into the chamber and is confined within the vortex chamber by the centrifugal force generated by the gas flow itself. This confined liquid forms a layer through which the flue gas is then forced to bubble, producing a strong gas/liquid interaction, high inertial separation forces and efficient particulate cleanup. During this quarter a comprehensive series of cleanup experiments have been made for three CVS configurations. The first CVS configuration tested gave very efficient fine particulate removal at the design air mass flow rate (1 MM BUT/hr combustor exhaust flow), but had over 20{double prime}WC pressure drop. The first CVS configuration was then re-designed to produce the same very efficient particulate collection performance at a lower pressure drop. The current CVS configuration produces 99.4 percent cleanup of ultra-fine fly ash at the design air mass flow at a pressure drop of 12 {double prime}WC with a liquid/air flow ratio of 0.31/m{sup 3}. Unlike venturi scrubbers, the collection performance of the CVS is insensitive to dust loading and to liquid/air flow ratio.

• Research Organization: Avco Research Lab., Inc., Everett, MA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-89PC89806
• OSTI ID: 5789445
• Report Number(s): DOE/PC/89806-T4; ON: DE92007760
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
FLUE GAS
PURIFICATION
PARTICULATES
REMOVAL
AIR POLLUTION ABATEMENT
BUBBLES
COAL
COMBUSTION
EFFICIENCY
GASES
INTERACTIONS
LIQUIDS
PRESSURE DROP
PROGRESS REPORT
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DOCUMENT TYPES
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASEOUS WASTES
MATERIALS
OXIDATION
PARTICLES
POLLUTION ABATEMENT
THERMOCHEMICAL PROCESSES
WASTES
014000* - Coal
Lignite
& Peat- Combustion
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions