Hitachi Zosen Inova Hands Over Modernised Swiss WtE Plant : Upgraded Waste to Energy Plant Secures Approval in Switzerland
Following four and a half months of downtime, commissioning has been completed of Horgen, Switzerland’s retrofitted KVA Horgen waste to energy plant.
The plant has been installed with new bottom ash and combustion technologies supplied by Swiss waste to energy technology manufacturer, Hitachi Zosen Inova, which the company said will allow it to operate with higher energy efficiency and improved material recovery in the future.
Following on from the Preliminary Acceptance Certificate (PAC) granted for the boiler in July 2015, the flue gas treatment system has now also received approval. This marks the completion of the project’s commissioning phase, and the plant has now entered full commercial operation.
According to HZI, thanks to lower excess air in the combustion process, the amount of flue gas is reduced and heat is recovered more efficiently. This was also said to mean lower NOx production and utility consumption.
Instead of the two previous combustion lines a single line is now generating the same power export in the form of electricity and heat for district heating from just 60% of the waste previously required.
Further, the company said that the new slag extraction system allows for improved material recovery, while the replaced flue gas treatment (FGT) unit ensures efficient operation and energy recovery.
The revamped plant, which is located near Zurich, was shut down for construction works 4.5 months, with HZI acting as the contractor responsible of the construction of the two installations.
The company said that commercial operation marks the culmination of commissioning activities to prove the plant’s capabilities.
With the flue gas treatment work, HZI said that it has now handed over full operational responsibilities to the KVA Horgen team, which will now run the facility. After three months of successful operation for the boiler, the final milestone in the commissioning works was reached with the granting of the PAC for the FGT lot, end of October 2015, following the completion of a series of operability tests by HZI.
“With the start of commercial operation at the revamped KVA Horgen plant we have achieved the most important milestone in upgrading a twenty-four-year old plant for reliable operation going,” commented Romano Wild, director of the KVA Horgen plant.
HZI CEO, Franz-Josef Mengede ,added: “With the PAC for the second lot of the revamping project, the KVA Horgen EfW plant is now fit for operation throughout 2030.”
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