- Provide a performance comparison between standard lances, advanced lances, and Sorb-Tec injectors.
- Identify possible reductions in the volume of sorbent injected to achieve minimum ABS formation temperature at the air heater inlet.
- 640 MW coal-fired generating unit, using Illinois Basin coal.
- Nol-Tec provided a temporary silo and injection equipment for the test.
- Hydrated lime is injected for mitigation of SO3, ABS, and blue plume.
- Sorbent was injected at the SCR outlet, with side A having six injection points and side B having two.
- An SO3 monitoring probe was installed at the air heater inlet on both the A and B sides of the duct.
- EPA Method 8A tests were performed at the air heater inlet on side A for select portions of testing.
High performance achieved against operating baseline when compared to standard or advanced lances.
- In SO3 removal, Sorb-Tec achieved same performance numbers using approximately 1,200 fewer lbs/hr of hydrated lime (when compared to advanced lances).
- In ABS formation reduction, Sorb-Tec achieved same performance numbers using approximately 1,600 fewer lbs/hr of hydrated lime (when compared to standard lances).
- All injectors tuned for different load operation, maximizing dispersion and mixing efficiency.
- Sorb-Tec demonstrated a 63% performance improvement (reduction) in sorbent usage over other lance-based technology.
- Estimated payback for technology purchase, based on sorbent reduction alone, is less than 1.5 years.
- Estimated annual savings in sorbent usage alone > ~$400,000/unit annually.
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