- Reduce amounts of sodium bicarbonate needed to be injected.
- Achieve stack SO2 compliance requiring ~60% removal.
- Evaluate performance of Sorb-Tec versus standard lance technology.
- 650 MW coal-fired generating unit, burning PRB coal
- Sodium bicarbonate is injected as the sorbent. Sorb-Tec trial was set up with two separate ducts (A & B).
- For the trial, eight Sorb-Tec injectors were installed in the lance ports in duct A and eight lances were maintained in duct B.
- An EPA approved SO2 CEMS was used to measure SO2 at the stack.
- Testing was performed by feeding identical sorbent injection rates to each duct, first into duct A (Sorb-Tec), then into duct B (lances),
High performance achieved against operating baseline when compared to standard lances.
- Sorb-Tec met and exceeded 70% removal requirement.
- Reduced sorbent consumption, offering 17% SBC savings (compared to lance injection)
- Data indicates even greater savings at higher percent removal requirements.
- Over two month test period, Sorb-Tec units had <10% of the recorded maintenance occurrences than the traditional lances had.
- Estimated payback period for Sorb-Tec, at the 17% sorbent savings rate, is less than one year.
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