Electrostatic precipitation of condensed acid mist

Technical Report · Mon Apr 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/5652015· OSTI ID:5652015

Dahlin, R S

This report deals with the second part (Phase 2) of a two-phased study of the control of acid mist emissions using a compact, wet electrostatic precipitator (WESP). The goal of the study was to determine the degree of acid mist control that could be achieved when a compact WESP was used to replace or augment the mist eliminators in a flue gas desulfurization (FGD) system. Phase 1 of the study examined the electrical operation of a lab-scale WESP collecting an acid mist from a coal combustion pilot plant equipped with a spray chamber. The results of this study were used to develop and validate a computer model of the WESP. In Phase 2, measurements were made at two utility scrubber installations to determine the loadings of acid mist, fly ash, and scrubber carryover. These measurements were used as input to the computer model to project the performance of retrofitted WESPs at both of the utility test sites. Phase 1 results showed that excellent electrical operating conditions could be achieved, but very high loadings of acid mist or the fine fly ash tended to degrade electrical operation because of space charge suppression of the corona current. Measurements made at the utility sites under Phase 2 showed that acid mist accounted for 40 to 57% of the total particulate mass, while fly ash and scrubber solids accounted for 40 to 55% and 1.0 to 3.4%. Impactor samples from both test sites showed an increase in acid content with decreasing particle size. 9 refs., 14 figs., 13 tabs.

• Research Organization: Southern Research Inst., Birmingham, AL (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-88PC88867
• OSTI ID: 5652015
• Report Number(s): DOE/PC/88867-T10; SRI-ENV--91-292-6657-XXXIV; ON: DE91016530
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
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Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
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DROPLETS
ELECTROSTATIC PRECIPITATORS
EQUIPMENT
FLY ASH
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HYDROGEN COMPOUNDS
INORGANIC ACIDS
PARTICLES
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
PROGRESS REPORT
RESIDUES
SPRAYS
SULFURIC ACID
THERMAL POWER PLANTS
WASTES