STEEL BELT CONVEYORS FOR SEVERE CONDITIONS since 1929

Kehrichtverwertung Zürcher Oberland (KEZO)

THE CHALLENGE

After the successful installation of the Magaldi Ecobelt® WA completed in June 2012 on the combustion lines #2 & 3, in 2013 the KEZO Hinwil CHP plant again confirmed the Magaldi dry technology for the wet-to-dry conversion project of the bottom ash handling system for the combustion line #1.
The retrofit of the existing wet hydraulic ram and the downstream rubber belt conveyor set a new milestone for material and energy recovery.

 

THE CUSTOMER

KEZO, that stands for Kehrichtverwertung Zürcher Oberland, is the owner of the waste incineration plant located at Hinwil in Switzerland.
The CHP plant is provided with three combustion lines, burning household and industrial wastes.
The line #1 has an output of about 40 thermal MW.

 

THE SOLUTION

In 2013, following the outcomes of the successful Magaldi installation serving the combustion lines #2 & 3, KEZO awarded Magaldi a contract for the supply of a further conveyor to handle the dry bottom ash produced by the combustion line #1.
In 2015, the existing wet hydraulic ram and the downstream rubber belt conveyor were replaced by an Ecobelt® WA conveyor. The excellent operating experience, gained with the steel belt conveyor installed in 2012, played a crucial role in the development of the 3rd generation of dry bottom ash handling systems from waste incinerators.
Considering the combustion line #1, the hot bottom ash is discharged onto a grizzly feeder to separate the large objects, released in a special box and then manually removed in a completely safe way. Instead, most of bottom ash falls onto the Ecobelt® WA conveyor that performs the cooling process while conveying the material to the downstream rubber belt conveyors.
That new Ecobelt® WA also receives:

As a result, the bottom ash and sifting ash produced by the three combustion lines are then delivered to the downstream metals recovery facility located behind the incineration plant. This innovative facility, designed to treat about 200,000 tons per year of bottom ash, is the first fully-dry slag recycling plant in the world.
The revamping of the bottom ash handling system on line #1 at the Hinwil CHP plant, was required due to the KEZO/ZAR Association’s need to reach the following targets:

The installation of the Magaldi Ecobelt® WA conveyor allowed them to reach these ambitious targets.

 

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