Magaldi
MAC

Since the ash is delivered dry, there are several different possibilities for the configuration of the equipment located downstream the primary crusher. The mostly applied configurations are described below.

1. From the crusher, the bottom ash is discharged through an ash conditioner into an existing ash conveying system, or into a truck or pit. This kind of configuration could be particularly attractive for retrofits, replacing the existing wet bottom ash extractor by a MAC extractor, while the existing downstream conveying system could be maintained. In that way, all benefits of primary extraction by the MAC system are obtained with a minimum cost for installation of new equipment.

2. A dry mechanical transport to a silo can be provided by a Magaldi Postcooler. The Magaldi Postcooler is a steel belt conveyor inside a sealed casing, providing a significant further cooling of the ash during conveying, with the dependability of the Magaldi technologies.

3. By the installation of a second crushing stage after the primary crusher, the ash size is fine enough to enable the transportation by a pneumatic vacuum system. With this configuration, the system can be fitted even in very restricted spaces.

4. If the dry bottom ash is pulverized by mills to a very fine size, it can be mixed with the fly ash. This can lead to a simplification of the overall ash handling system and increased ash sales revenues. In this configuration, usually a Magaldi Postcooler is used to transport the ash from the crusher to the pulverizers, followed by pneumatic conveying to the fly ash silo

Further different configurations are possible. The integration of the MAC system with other ash handling systems, e.g. for economizer ash, is also possible. This can lead to a further simplification of the overall ash handling system.

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