Wall-Fired Boiler Design Criteria for Dry Sorbent SO2 Control with Low NOx Burners

摘要

The report assesses the impact of Limestone Injection Multistage Burner (LIMB) technology on wall-fired utility boilers for both new and retrofit designs. Recent attention has focused on dry sorbent sulfur dioxide (SO2) control technology which, in conjunction with low-nitrogen-oxide (low-NOx) burners, can reduce the two main acid rain precursors, SO2 and NOx. Riley Stoker wall-fired boilers are used for the survey and compared with the entire wall-fired, coal-fired utility boiler population. The influence of dry sorbents and staged combustion burners on boiler design was reviewed, and potential problem areas are noted. The review covers the sorbent (including storage and handling), the boiler and its appurtenances, and related flue gas cleanup and handling system.