Field Test Program for Long-Term Operation of a COHPAC System for Removing Mercury from Coal-Fired Flue Gas

摘要

Injection of sorbents upstream of a COHPAC baghouse for mercury removal showed promising results during a short-term evaluation conducted in 2001. However, to truly begin estimating the long-term mercury removal capability and the impact on plant operating equipment of this technology, a much longer-term evaluation is essential. The Department of Energy National Technology Laboratory (NETL), Southern Company, and EPRI funded a follow-on program to evaluate sorbent injection for mercury control for a year of continuous operation. The test was conducted at Alabama Power Company's Plant Gaston Unit 3. The overall objective was to evaluate the long-term effects of sorbent injection on mercury capture and COHPAC performance. Data from the testing will be used to determine: 1. Air-to-cloth ratio; 2. Advantages/disadvantages of high-permeability fabrics; and 3. Design criteria and costs for new TOXECON systems.