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Zürich, Switzerland

Hitachi Zosen Inova Ag | Date: 2014-12-03

The present invention relates to a waste feed device for feeding waste into a combustion space of a waste incineration plant, including a waste feed shaft wall surrounding a waste feed shaft. In this case, at least part of the waste feed shaft wall is formed from a multiplicity of separate panels which are connected releasably to one another and which comprise, on their side facing the waste feed shaft, a panel inner wall and, on their side facing away from the waste feed shaft, a panel outer wall which is spaced apart from the panel inner wall and which with the panel inner wall surrounds a panel cavity.

Hitachi Zosen Inova Ag | Date: 2014-01-16

A biogas plant fermenter supply method increases total throughput of substrate through fermenter chambers while not changing the number of fermenter chambers. An inoculum fermenter chamber is supplied with raw fermentation substrate and fermenting for a dwell time, returning part of the substrate fermented in the inoculum fermenter chamber in the form of a self-inoculating substrate to the inoculum fermenter chamber by a return path, the part being mixed with the raw fermentation substrate, and supplying a fast fermenter chamber coupled to the inoculum fermenter chamber with an additional part of the substrate fermented in the inoculum fermenter chamber in the form of a fast fermenter inoculation substrate and mixing the additional part with fast fermenter raw substrate of an amount per unit of time, wherein fermented output substrate is removed from the fast fermenter chamber after a dwell time of the substrate mixture introduced into the fast fermenter chamber.

Hitachi Zosen Inova Ag | Date: 2014-06-06

In the case of an agitator shaft of a fermenter of a biogas plant, including agitator brackets, which are arranged on a shaft wall and on which at least one agitating arm, including an agitating arm fastening portion and a blade carrier can be connected to the agitator brackets by fastening two agitating arm fastening plates of the agitating arm, it is intended to provide a method that achieves easier and quicker assembly of an agitator shaft and integration in a fermenter in situ, whereby a considerable cost saving in the setting up of a fermenter is achieved. This is achieved by cutting out fastening holes in the agitator brackets and cutting out through-holes in the agitating arm fastening plates in such a way that a plurality of retaining ring bolts can be arranged so as to pass completely through the fastening holes and the through-holes and can be riveted therein.

Hitachi Zosen Inova Ag | Date: 2012-03-28

A method for optimizing the burnout of exhaust gases of an incinerator includes introducing a solid material via an inlet into a combustion chamber defining a primary combustion space, combusting the solid material in the primary combustion space, in the form of a combustion bed conveyed over a combustion grate, with admission of primary air, discharging the combusted solid material from the primary combustion space via an outlet arranged opposite the inlet in the conveying direction, combusting the primary combustion gases released during the combustion of the solid material, with admission of secondary air, in a secondary combustion chamber defining a secondary combustion space and arranged downstream of the combustion chamber in the flow direction of the combustion gases, and homogenizing the exhaust gases containing the primary combustion gases in a mixing zone by means of a fluid introduced via a nozzle before entry into the secondary combustion space.

Walser T.,ETH Zurich | Limbach L.K.,ETH Zurich | Brogioli R.,ETH Zurich | Erismann E.,Hitachi Zosen Inova AG | And 12 more authors.
Nature Nanotechnology | Year: 2012

More than 100 million tonnes of municipal solid waste are incinerated worldwide every year. However, little is known about the fate of nanomaterials during incineration, even though the presence of engineered nanoparticles in waste is expected to grow. Here, we show that cerium oxide nanoparticles introduced into a full-scale waste incineration plant bind loosely to solid residues from the combustion process and can be efficiently removed from flue gas using current filter technology. The nanoparticles were introduced either directly onto the waste before incineration or into the gas stream exiting the furnace of an incinerator that processes 200,000 tonnes of waste per year. Nanoparticles that attached to the surface of the solid residues did not become a fixed part of the residues and did not demonstrate any physical or chemical changes. Our observations show that although it is possible to incinerate waste without releasing nanoparticles into the atmosphere, the residues to which they bind eventually end up in landfills or recovered raw materials, confirming that there is a clear environmental need to develop degradable nanoparticles. © 2012 Macmillan Publishers Limited. All rights reserved.

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