Engineering development of advanced coal-fired low-emission boiler systems. Quarterly technical progress report, January 1996--March 1996

Summary of activities and key accomplishments are presented for the following tasks: NO{sub x} subsystem; SO{sub 2} particulate/air toxics/solid by-product subsystem; boiler subsystem; balance of plant subsystem; and control and sensors subsystem. Combustion cases completed for the DRB-XCL{reg_sign} burner and the initial DRB-4Z{trademark} configuration were compared with measured furnace exit data and observed flame characteristics from the initial round of Subsystem Testing to baseline the models prior to parametric runs. A series of combustion models have been completed for the DRB-4Z{trademark} to evaluate the distributed introduction of secondary combustion air into the flame and key hardware components planned for the May Subsystem Testing campaign. On the basis of the results compiled during the concept selection process completed in Phase I, the Limestone Injection Dry Scrubbers (LIDS) process was selected for further development and evaluation. Through engineering analysis, experimental testing, and numerical modeling, a LIDS process is being developed that is capable of ultra-high SO{sub 2} removal and superior particulate control while addressing the potential issues of air toxic emissions and solid byproduct utilization. The progress of the LIDS activities is discussed in this report