Flue gas conditioning for improved particle collection in electrostatic precipitators

Technical Report · Tue Jul 14 00:00:00 EDT 1992

OSTI ID:7269636

Durham, M D

The work plan called for a two stage screening process for the additives to determine their ability to improve the collection of flyash particles in ESPS. The first test series was an investigation of the survival of the candidate additives and a qualitative evaluation of the mixture cohesivity at a temperature of 300{degree}F, typical of flue gas duct conditions. In the second test series, materials that successfully completed the exposure testing will be added to a simulated flue gas stream and their effect on flyash deposited in an electric field will be evaluated. During this quarter the first phase of laboratory screening was completed. Various polymers and natural compounds were tested in the laboratory for their suitability as ESP additives. Table 1 presents a list of the additives that were evaluated. Initial tests consisted of mixing 5 g of fly ash with 5 ml of an aqueous additive solution. Additive solutions of both 0.1% and 1.0% were added in equal amounts to a fly ash sample. This mixture was placed in an aluminum dish and weighed. The dish was then heated at 300{degree}F for two hours, weighed, heated for an additional 3 hours and weighed again. The characteristics of the final heated samples were then inspected and subjectively judged relative to the cohesiveness of the dust cake. The observations were recorded and graded on a cohesive scale from + (low) to + + + + + (high). The results are presented in Tables 2 and 3. At a concentration of 0.1% it was difficult to determine large variations between samples, so tests using 1.0% solutions were done. Most of the additives performed better at the higher concentrations, except for a few. All of the glycols and the Swift adhesives performed better at the lower concentrations. This may be due to interactions between the polymers and the ash particles.

• Research Organization: ADA Technologies, Inc., Englewood, CO (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-91PC90364
• OSTI ID: 7269636
• Report Number(s): DOE/PC/90364-T3; ADA-4300-92-Q3; ON: DE92040454
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
ELECTROSTATIC PRECIPITATORS
EFFICIENCY
FLUE GAS
ADDITIVES
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION CONTROL
ELECTRIC CONDUCTIVITY
PROGRESS REPORT
CONTROL
DOCUMENT TYPES
ELECTRICAL PROPERTIES
EQUIPMENT
GASEOUS WASTES
PHYSICAL PROPERTIES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions