| Main Title |
Electrostatic Enhancement of Fabric Filtration of Fly Ash and Spray Dryer By-Product. |
| Author |
Hovis, L. S. ;
Daniel, B. E. ;
Donovan, R. P. ;
|
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. ;Research Triangle Inst., Research Triangle Park, NC. |
| Year Published |
1985 |
| Report Number |
EPA/600/D-85/277; |
| Stock Number |
PB86-130010 |
| Additional Subjects |
Fly ash ;
Air pollution control equipment ;
Spray drying ;
Industrial wastes ;
Combustion products ;
Byproducts ;
Pressure ;
Performance evaluation ;
Electrostatic fabric filters ;
Fabric filters
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB86-130010 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
27p |
| Abstract |
The paper describes small pilot-scale experiments, showing that the pressure drop increase during the fabric filtration of redispersed spray dryer by-product (chiefly calcium salts and fly ash) is significantly reduced by electrostatic enhancement of the filtration. The pressure drop rise for a typical electrostatically augmented fabric filtration (ESFF) is only 25% or less of that of the rise for a conventional filtration cycle. The ESFF takes advantage of the electrical characteristics of the spray dryer by-product, specifically the higher natural electrical charge, as compared to fly ash, and the relatively lower electrical resistivity of the spray dryer by-product at the high moisture and the low temperature conditions of filtration of spray dryer by-product. The low resistivity of the spray dryer by-product and certain fly ashes allows application of high corona voltages in the new Center-wire ESFF to produce an even slower pressure drop increase over the filtration cycle. Center-wire ESFF proved to be operable under conditions of high gas velocities and grain loadings which were beyond the range for successful conventional reverse-air fabric filtration. Results of tests on the Center-wire ESFF are presented and compared with conventional fabric filtration. |
| Supplementary Notes |
Prepared in cooperation with Research Triangle Inst., Research Triangle Park, NC. |
| PUB Date Free Form |
Nov 85 |
| Category Codes |
13B; 68A |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/13 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
605823957 |
| Origin |
NTIS |
| Type |
CAT |
