Bottom ash cooling
A project for generating electricity in the Midwest.
Metso hav sold a quantity of six (6) Model D2420-6Holo-Flite® High Temperature Coolers to ALSTOM Power Inc., in Windsor, Connecticut, forthe continuous cooling of bottom ash from a fluidized bed boiler.
Bottom ash is discharged from a Circulating Fluidized Bed (CFB) boiler at approximately 1650°F into the Holo-Flite® cooler. The ash composition includes fuel ash from coal as well as sand and other products of combustion and emission reduction processes. The ash is cooled in the Holo-Flite® to a maximum temperature of400°F to protect the downstream material conveying and storage equipment.
Project in Depth
This project was first quoted in August of 2005 and the purchase order was received in December, 2006, a total period of time of 16 months. During this period, Metso worked through the local representative, Mr. Jeff Kerner, as well as various individuals within ALSTOM. Metso was also contacted by the end user that stated that they preferred ash screw coolers versus a fluidized bed cooler for the ash. The end user indicated that this was based on the fact that neither system of ash cooling was maintenance free in the highly abrasive and erosive environment of ash cooling.
They further stated that in the case of the Holo-Flite® ash screw cooler(s), they could take one o fthe multiple units out of service, perform the required maintenance, and bring the screwcooler back into operation without any loss of power plant production. In the case of the fluid bed coolers, when maintenance is required, the entire power plant must be shut down and taken off line. Generally power plants are only shut down for planned maintenance or an outage in the spring and fall of the year when power demand is at its lowest.
Brochure HoloFlite EN (634 kB)