Recent Operating Results of the Five New Wet FGD Installations for Ameren Corporation

摘要

Hitachi Power Systems America, Ltd. has recently completed the Start-Up, Performance Testing and several months of operation on the five (5) Wet Limestone Forced Oxidation Scrubbers (WFGD) installed in Missouri and Illinois for Ameren. Ameren Corporation is the parent of utility companies that serve 2.4 million electric customers and 1 million natural gas customers in a 64,000 square-mile area of Missouri and Illinois. This paper will discuss the project backgrounds along with the design and operating performance of the advanced SO_2 reduction technology that was implemented on these five units. The performance of these WFGDs has delivered ultra low SO_2 emissions which also demonstrates the capability to reliably deliver CO_2 ready clean flue gas for future carbon capture programs where single digit PPM SO_2 emissions are required. The paper will discuss the advanced design features and performance of these WFGD systems including SO_2, SO_3, PM, and mercury capture efficiencies. These installations are reliably achieving over 99% SO_2 reductions without the use of additives, internal packing or other chemical additions. With the new Utility MACT requirements expected to be finalized soon, these units will have the advantage of their excellent multi-pollutant control aspects. It will be most important to achieve lower acid gasses, mercury, and filterable PM emissions in light of the new regulations.