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We are very pleased to have been chosen as winners of the DEBI "Low Carbon Innovative Business" for 2012 which was held at the MET Office in Exeter.

THE EXETER CHARCOAL RETORT

image of retort

See article in Living Woods Magazine Jan. 2012

See article in Living Woods Magazine March 2012

The advantages of our retort over a ring kiln are:

 

retort open  

burning gases

The retort was carefully designed & computer modelled to ensure that it burned off harmful particles & emissions by ducting the hot gases around & back into the retort.

THE ABOVE PHOTOGRAPH SHOWS THE RETORT LOADED WITH SHORT ROTATIONAL WILLOW. IT WILL JUST AS EASILY PYROLYSE HARDWOOD BLOCKS FOR BBQ CHARCOAL.

When the subject wood is first heated, it enters the endothermic stage. This is where external energy (combustion in fire box) is required to start the process. During this stage, steam is given off. As the temperature rises, wood gases becomes mixed with the steam. This ‘dirty’ stage only lasts approx. 30 minutes.

When the temperature reaches 375ºC, the steam has reduced & the gases, when diverted into the firebox, ignite. This is referred to as the exothermic or retorting stage, where the ignited gas jets are sufficient to complete the process of pyrolysation with no additional external energy.

By using a combination of adjusting the gaps of the firebox doors & the chimney butterfly valve, the temperature is kept below 500ºC during the retorting stage.

Email: admin@carboncompost.co.uk

Tel: Robin on 01392 431454 or 07515 683908
Geoff on 01392 274699 or 07966681676

Address: Carbon Compost Co. Ltd, 167 Mincinglake Road, Exeter, Devon, EX4 7DS