Members' News 2020

Milestone order for Magaldi. The Ecobelt® WA technology seduces the Land of the Rising Sun.

On August 2019, Magaldi Group and KHI signed a contract with the Kyoto City management to equip the urban Waste-to-Energy plant with the Ecobelt® WA technology.

After the successful projects carried out in Europe, Magaldi was requested to bring its extensive know-how in dry bottom ash handling to retrofit the wet system in the Japanese WtE plant.

The Kyoto City Northeast Clean Center is equipped with two grate firing boilers (7.5 MWe each) burning 233,000 tonnes per year of municipal solid waste and producing a bottom ash rate ranging from 1.5 up to 7 t/h.

Currently the boilers are fitted with a wet system provided with several conveyors up to the final discharge point. The configuration designed by Magaldi is definitely simpler and consists of one conveyor for unit# 1 and two conveyors – one after the other – for unit #2.

The crucial factors that tripped the balance in favour of awarding the retrofit project to Magaldi were the drastic reduction in water consumption, the increased availability of the bottom ash handling system and a more effective metal separation ensured by the Ecobelt® WA technology. 

The latter allows the dry removal of hot bottom ash from grate boilers. By replacing the use of water with air as primary cooling medium, the result is an effective environmental risk mitigation and lower O&M costs because there is no need to dispose of or treat water.

Entirely enclosed in a dust-proof steel casing to prevent any spillage of material into the environment, the Ecobelt® WA promotes an intimate contact between air and ash particles, that maximizes the cooling process and the unburnt carbon conversion.

Ambient air used for ash cooling can be injected into the combustion chamber so that the relevant amount of energy, mainly in the form of ash sensible heat, can be recovered to increase the boiler efficiency.

Furthermore, the Ecobelt® WA system increases the yields of the downstream metals recovery process. As slag is discharged without the use of water, metals are neither quenched nor introduced to an alkaline environment, thus providing high-quality raw materials. In addition, the mineral fraction of bottom ash is not lumped together, making later separation of metals and mineral fraction easier and more effective.

For the Kyoto Clean Center project, handover to the customer is scheduled for July 2020 for unit #1 and May 2021 for unit #2 while start-up is scheduled respectively for May 2021 for unit #1 and March 2022 for unit #2.

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Right Around the World: Hitachi Zosen Inova Supplies Technology for Energy from Waste Plant in Australia

Hitachi Zosen Inova is delivering its first energy-from-waste plant in Australia in East Rockingham near Perth. In addition to developing and constructing the state-of-the-art facility, the company will also part-own and cooperate it.

By the end of 2022 a new Energy from Waste (EfW) plant is to be built around 40 kilometres south of Perth in the state of Western Australia. The East Rockingham Resource Recovery Facility (RRF) project was developed by a consortium consisting of Swiss cleantech company Hitachi Zosen Inova (HZI) plus Australian project developer New Energy Corporation and Abu Dhabi developer Tribe Infrastructure. The contract to design, build and commission the plant was awarded by the project shareholders to an EPC consortium formed by Acciona Industrial and HZI.

HZI will be delivering everything from the waste crane to the stack in the form of its proprietary combustion technology, including the reciprocating grate and a highly efficient multistage flue gas treatment. Consortium partner Acciona will be in charge of civil construction, the water & steam cycle plant, the installation and erection of HZI’s equipment and the balance of the plant.

The EfW plant will process 300,000 tonnes of municipal and industrial waste a year from the domestic and industrial zones in the surrounding area under the jurisdiction of East Mindarie Regional Council (EMRC) and Cockburn Council. This will be used to generate 28.9 MWe of energy which will be fed into the grid, contributing directly to the supply of energy to the agglomeration around Perth.

Sustainable Waste Management for Australia

Even though there is no official ban on landfill in Australia, for some time people have been rethinking sustainability and efficient waste management. As one of the first of its kind in the country, Rockingham RRF will play a pioneering role and point the way forward for future EfW installations in Oceania. Marc Stammbach, Managing Director of HZI Australia, emphasises the relevance of the project for all concerned: “For HZI this project marks our entry into the Australian market and introduces our world renowned and leading technology to Australia – something we’ve been working on for a long time. For the Perth area this project marks a major step towards sustainability and renewable energy from waste.”

Supporting the Local Economy

Besides its contribution to environmental awareness, the project is also highly significant for the local economy. Alongside technical know-how from Switzerland, a large part of the material, equipment and productive capacity will be provided by regional and national companies. In addition to this, around 300 people will be employed temporarily on the site during the construction phase. After this the plant will be operated for at least 20 years by a joint venture between SUEZ and HZI, providing permanent operation and maintenance jobs for a further 40 people. HZI is also committing to this project long-term as a project shareholder.

Construction is scheduled to begin at the beginning of January 2020, so that the plant can go into full operation by the end of 2022.

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