Pilot-Scale Characterization of Dry Sorbent Injection for SO₂ Control in a Low-NO_x Tangential System

A 380-kW (1.3 million Btu/hr) two-burner level, tangentially fired, pilot-scale facility was used to characterize a dry-calcium-based sorbent SO₂ capture technique combined with an offset auxiliary air low-NO_x burner. Baseline tests showed that the facility properly simulates full-scale temperatures and emission levels. Dry sorbent SO₂ test results suggest that for enhanced sorbent SO₂ capture, injection should take place away from the burner zone where temperatures are lower, and that the time sorbent particles spend in the optimal temperature range should be extended as much as possible through sorbent injection methods and temperature profile modification.