CFD modeling could optimize sorbent injection system efficiency
Several technologies will probably be needed to remove mercury from coal-plant stack emissions as mandated by new mercury emission control legislation in the USA. One of the most promising mercury removal approaches is the injection of a sorbent, such as powdered activated carbon (PAC), to make it much more controllable. ADA-ES recently simulated field tests of sorbent injection at New England Power Company's Brayton Point Power Plant in Somerset, Mass., where activated carbon sorbent was injected using a set of eight lances upstream of the second of two electrostatic precipitators (ESPs). Consultants from Fluent created a computational model of the ductwork and injection lances. The simulation results showed that the flue gas flow was poorly distributed at the sorbent injection plane, and that a small region of reverse flow occurred, a result of the flow pattern at the exit of the first ESP. The results also illustrated that the flow was predominantly in the lower half of the duct, and affected by some upstream turning vanes. The simulations demonstrated the value of CFD as a diagnostic tool. They were performed in a fraction of the time and cost required for the physical tests yet provided far more diagnostic information, such as the distribution of mercury and sorbent at each point in the computational domain. 1 fig.
- OSTI ID:
- 20712324
- Journal Information:
- Power Engineering (Barrington), Journal Name: Power Engineering (Barrington) Journal Issue: 1 Vol. 110; ISSN POENAI; ISSN 0032-5961
- Country of Publication:
- United States
- Language:
- English
Similar Records
Advanced Utility Mercury-Sorbent Field-Testing Program
Brominated Sorbents for Small Cold-Side ESPs, Hot-Side ESPs and Fly Ash Use in Concrete
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
ACTIVATED CARBON
AIR POLLUTION CONTROL
COMPUTERIZED SIMULATION
DESIGN
EFFICIENCY
FIELD TESTS
FLOW MODELS
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GAS FLOW
MASSACHUSETTS
MERCURY
NOZZLES
OPTIMIZATION
POLLUTION CONTROL EQUIPMENT
SORBENT INJECTION PROCESSES
USA