THE DESIGN AND OPERATION OF THE UNIT 5 SCR AT THE AEP MUSKINGUM RIVER PLANT

摘要

Unit 5 at the AEP Muskingum River Plant is a nominal 600 MW supercritical coal fired steam generator. As part of a regional emissions reduction plan, AEP decided to retrofit Unit 5 with an SCR system. Foster Wheeler was selected to design, supply and erect the SCR system with project performance guarantees of 90% NO{sub}x reduction, less than 2 ppmvd ammonia slip, a catalyst life of 16,000 operating hours and a maximum SO{sub}2-SO{sub}3 conversion of 0.5%. The design of the SCR reactor and connecting flues was based on a modular construction scheme, minimizing on-site labor and outage duration. A 3-D computer model was used in the SCR design to identify fit-up and interference issues with existing equipment. The SCR is equipped with a unique, compact AIG/static mixing system to provide thorough NH{sub}3/NO{sub}x mixing prior to entering the SCR catalyst over the entire design load range. A 1/12th scale physical gas flow model study was performed which was used to verify the performance of the mixing system and optimize the flow distribution throughout the SCR system. The Muskingum River 5 SCR is also equipped with an Ammonia On Demand system at AEP's request. Foster Wheeler supplied and installed the AOD system consistent with AEP specifications. The presentation shall highlight the SCR design, the modular construction approach, the 3-D computer model and its benefits, AIG/static mixing system, flow model study and initial startup, commissioning and performance results.