부산대학교 도서관

Limestone Injection Multistage Burner (LIMB) technology has been proposed as a low-cost acid rain control strategy for reduction of SO /SUB x/ and NO /SUB x/ emissions. This paper presents conceptual equipment design and cost estimates for retrofitting a typical 500 MW utility boiler to LIMB technology. Unlike previous studies which have largely not addressed the cost of particulate collection, this study includes an evaluation of these costs. To address the range of pertinent applications for the midwestern and northeastern states, designs were developed for both medium sulfur and high sulfur coals. Two limestone stoichiometries were selected for each coal to encompass the range of recent pilot-scale test results; thus a total of four conceptual designs and cost estimates are discussed. The equipment includes limestone handling, pulverizing and injection systems, boiler modifications, and fly ash collection and disposal equipment.