IEA Grimethorpe Pressurized Fluidised Bed Test Facility Incident Report: History of Erosion on the Primary and Secondary Quench Vessel Vent Valves

摘要

The original vent valves installed on the primary and secondary quench vessels have experienced extensive internal erosion. The report provides details of the engineering work that has been undertaken to overcome the problem. Modifications were made to the valves during hot commissioning in order to reduce the erosive action, but these did not produce a significant improvement. During Test Series One, an alternative valve arrangement was installed which proved successful, and identical valves will be installed at the other locations for Test Series Two. The problem of erosion of the vent valves is likely to be specific only to the wet ash disposal system at the Grimethorpe Facility, as a commercial plant would probably utilize a dry system without the associated cyclone blowdown and venting requirement. (ERA citation 08:020257)