CCS AND POWER SYSTEMS
ADVANCED ENERGY SYSTEMS - GASIFICATION SYSTEMS
LONG-TERM REFRACTORY DURABILITY TESTS (TRANSPORT GASIFIER)
Performer: Southern Company Services, Inc.
Project No: NT0000749
- Prior to Test Run 2 (R02), gasifier inspection identified refractory damage in the standpipe, with hot-face refractory loss on both sides of the J-leg/standpipe intersection. The refractory in these places was the original refractory installed in the gasifier (Rescocast 17EC). Repairs were completed prior to R02 using Resco Quikturn 60 RSP (rotor stator pump) refractory. This area was monitored during the run using a thermal imaging camera and skin-mounted thermocouples. Post-run inspections showed that the repaired refractory was in good condition.
- During the February 2008 test run, several pieces of separated refractory (2 inches thick by 8 inches wide by 12 inches long) were found in the solids separation unit of the gasifier. The extent of refractory damage made a complete replacement necessary. The Atchem 85VC refractory was replaced with Rescocast 88VC. Based on the operating experienced at the PSDF, the Atchem 85VC refractory is not suitable in this application due to the high number of thermal cycles associated with multiple startups and shutdowns.
- During routine inspections of the gasifier in 2009, refractory damage arising from the loss of hot-face refractory was identified in the standpipe. A major 2012 accomplishment was the replacement of the gasifier standpipe. Since the repair, the new gasifier standpipe has demonstrated excellent refractory performance.