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LLT to supply ‘chute to stack’ biomass boiler island to Chartres

France-headed thermal energy system provider Leroux & Lotz Technologies (LLT) has announced that it has received an order from SPL Chartres Métropole Énergies for the design, manufacture, installation, and commissioning of a 26.5 MWth 'chute to stack' boiler island for its new biomass-fired combined heat and power (CHP) plant being built in Chartres, France.

Schematic of the boiler island for the 26.5 MWth biomass-fired combined heat and power (CHP) plant to be built in Chartres, France (illustration courtesy Leroux & Lotz Technologies). Schematic of the boiler island for the 26.5 MWth biomass-fired combined heat and power (CHP) plant to be built in Chartres, France (illustration courtesy Leroux & Lotz Technologies).

According to a statement, Leroux & Lotz Technologies (LLT) was awarded the contract based on a “techno-commercial attractive package” using its bubbling fluidized bed (BFB) combustion technology. The new state-of-the-art 26.5 MWth combined heat and power (CHP) plant will use recycled waste wood as fuel and is to be built on a greenfield site in the Industrial Zone of Gellainville, approximately 4 km “as the crow flies” from the town’s famous Notre-Dame de Chartres cathedral.

The site is also about 1.7 km from the existing CURDEM gas fired district heating (DH) plant and close to the hospital, which is one of the larger heat consumers on the heat network. The location also provides good road access for waste wood delivery and has easy connection the existing power infrastructure managed by the RSEIPC, the local electricity distribution company.

To overcome the limitation in superheated steam temperature set by the chlorides in the fuel, an external 2.5 MWth natural gas fired superheater is part of the system. The hot flue gases from this unit are directed into the biomass boiler furnace for maximum heat recovery. Designed to meet the Waste Incineration Directive (WID) requirements of 2 seconds at 850°C, the boiler will produce approximately 30 tonnes-per-hour of steam at 520°C – 75 bar abs.

The new plant is expected to commence operations towards the end of 2018.

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