Main Title |
Conditioning of fly ash with sulfur trioxide and ammonia. |
Author |
Dismukes, Edward B.
|
Other Authors |
|
CORP Author |
Southern Research Inst., Birmingham, Ala.;Environmental Protection Agency, Washington, D.C. Office of Research and Development.;Tennessee Valley Authority, Chattanooga. Power Research Staff. |
Publisher |
NTIS, |
Year Published |
1975 |
Report Number |
EPA/600/2-75/015; SORI-EAS-75-311; 2932-3-F; EPA-68-02-1303; CPA-70-149; EPA-ROAP-21ADJ; TVA-F75-PRS-5 |
Stock Number |
PB-247 231 |
OCLC Number |
17960040 |
Subjects |
Fly ash ;
Air--Pollution ;
Electrostatic precipitation
|
Additional Subjects |
Air pollution control ;
Electrostatic precipitation ;
Fly ash ;
Electric power plants ;
Flue gases ;
Additives ;
Combustion products ;
Coal ;
Sulfur trioxide ;
Ammonia ;
Ash content ;
Chemical analysis ;
Chemical properties ;
Electrical resistivity ;
Particles ;
Particle size ;
Cost estimates ;
Particulates
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 600-2-75-015 |
c.1 |
Headquarters Library/Washington,DC |
02/28/2013 |
EKBD |
EPA-600/2-75-015 |
|
Research Triangle Park Library/RTP, NC |
05/23/1997 |
ELBD ARCHIVE |
EPA 600-2-75-015 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ESAD |
EPA 600-2-75-015 |
|
Region 10 Library/Seattle,WA |
08/28/2018 |
DISPERSAL |
NTIS |
PB-247 231 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
154 pages |
Abstract |
The report summarizes research on the conditioning of fly ash in coal-burning electric power stations with two flue-gas additives--sulfur trioxide and ammonia. It presents experimental data on the use of these additives to improve the efficiency of electrostatic precipitation of fly ash by adjusting the electrical resistivity of the ash and by other less widely recognized mechanisms. The report shows that the primary role of sulfur trioxide is lowering resistivity from the excessive values found with ash from low-sulfur coals. It also indicates that the role of ammonia does not involve a change in resistivity, despite findings to the contrary by other investigators. At least for the specific circumstances investigated, the research data indicate that conditioning by ammonia involves a space-charge enhancement of the electric field in the interelectrode space of a precipitator and, sometimes additionally, an increase in the cohesiveness of the collected ash. The report addresses both the theoretical aspects of conditioning mechanisms, and such practical matters as the effectiveness of each agent as a function of the concentration added, the facilities used for adding the agent, the chemical composition of the ash treated, and the temperature of the ash during conditioning and precipitation. |
Notes |
PB 247 231. |