|
Coal-Fired Boiler -Reverse Air Fabric Filter Performance Evaluation and Optimization |
 |
 |
 |
|
Air Control Techniques, P.C. personnel performed a detailed engineering
evaluation of a reverse air fabric filter serving a large utility
boiler firing low sulfur western coal. This project involved a detailed
review of the operating records, the measurement of selected operating
parameters using portable instruments, and a detailed internal
inspection. Air Control Techniques, P.C. demonstrated that the chronic
and severe dust seepage problems were due to inadequate reverse air
flow rates. The modified operating procedures that were recommended
eliminated the 40% to 80% opacity excursions following the cleaning
cycle of each compartment. The plant received an environmental award
from the EPA Regional Office for the reduction in emissions. Due to the
changes recommended by Air Control Techniques, P.C., bag service life
was extended to the 10-year point. This saved the company approximately
one million dollars in bag replacement costs and approximately one
million dollars in labor and unit out-of-service costs. Air Control
Techniques, P.C. has continued to work with the plant for ten years.
During that time, we have conducted routine internal inspections,
provided recommendations concerning cleaning system changes, helped in
the conversion to fabric filter on-conditions during boiler start-up,
prepared specifications for new filter bags, and conducted bag
installation quality assurance services.
|
