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Dordtech is partner
and overall contractor
Responsible for: –Concept
–Engineering
–Planning
–Construction and realization
–Commissioning
–Operations
–Maintenance Dorset conference
20 June 2014 Dordtech - Ecocycle project
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Skills of Dordtech
• Engineering and projectmanagement of sustainable energy production systems
• Producer of CHP units for alternative fuels
• Producer of gastreatment sets
• Cooperative partner for decentral power plants like biogas- and gasification plants
• Cooperative partner for using heat in driers, orc’s and absorption coolers
In the last few years Dordtech became
Overall contractor of green powerplants Dorset conference 20 june 2014
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Vapour Processing System
Total Lyon
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Bio oil (animal fat) CHP head office TNT
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Biogas installation Belgium
2x 1MWe biogas and 1MWe dual fuel bio-oil CHP
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Ecocycle is a leading energy from
biomass and combined heat &
power plant developer, utilizing
operationally proven biomass
gasification technology.
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- Ecocycle project
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General data Ecocycle
gasification plant Usk
• Design/layout Ecocycle/Dordtech
• Contractor Dordtech
• Commissioning: June/July 2014
• Fuel input: Woodchips TS 85%
• Fuel consumption 48.000 tons/y
• Power output: 6.300 kWe
• Heat output 5.000 kWth
• Operational hours/year 7.500
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Gasification plant in Usk (Wales)
Woodchips as fuel – power 6,3 MWe and 5 MWth
With exception of delivering the gasifier (Eco-Cycle/Torftech) Dordtech
provided: Engineering and construction; all piping and electrical
connections; Over-All control technology of all major components
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Fuel treatment
transport – cleaning – drying – storage – dosage
Syngas treatment
cleaning – cooling – ashcollecting
Syngas distribution
gasbuffer – emergency flare – CHP units
Heat distribution
boiler – dryer – absorption chiller – emergency
coolers
Gasification is complex
dedicated issues are:
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Woodchips for the gasifier need to have a TS of around 85%.
Heat from the CHP can be used for drying the feedstock
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Storage & dosing of woodchips
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Dorset belt driers TOMO 33
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Capacity 4 MWth:
Input : 8t /hr @ 40% moisture
Output: 6t /hr @ 20% moisture
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Dorset driers are simple, robust and
excellent for drying biomass
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A screw press and elevator conveys the dried
woodchips to the fuel hopper
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Fuel hoppers and dosing screws
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Propane is used for start up phase, heating up the gasifier
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Woodchips are gasified
In the Torftech gasifier at
aproximately 700⁰C with
minimum O2.
The fuel is separated in
syngas and 3 – 5 % of ash
Syngas fuel variability
Comp. Min max
H2 8,6 61,9 vol%
CO 22,3 55,4 vol%
CH4 0 8,2 vol%
CO2 1,6 30,0 vol%
N2 + air 0,2 49,3 vol%
H2O 0 39,8 vol%
H2/CO 0,33 2,36 vol%
LHV 5,02 12,57 vol%
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The produced Syngas needs to be cleaned and cooled
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WESP = Wet ElectroStatic Precipitator for removal of solid
particles and liquid droplets from the gas stream
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Heat from the CHP units is used for the absorption chiller to
produce water of 6°C to cool the syngas
the syngas from 800°C to 15°C
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To create a balanced system / contstant gas flow
a gasbuffer of 200 m³ is installed
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In emergency cases, or for Off – Spec
syngases a flare is installed
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Before (clean) Syngas is
brought into the CHP unit
it needs to have a
constant pressure and
temperature
Gastrain and blower isle
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DR – Guascor adapted gas engines are de-rated to 700 kWe
on syngas ( LHV 4,8 – 7 MJ/Nm3 )
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Housing for 9 CHP units
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The gensets are located in dedicated
sound – isolated canopees
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Chimneys and heat take – off
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All heat can be dump cooled
in case of emergency
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Pipe work and heat transferr
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And pipe work and heat transferr
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All the electrical connections
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All the electrical wiring
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Control technology
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Next project 2015 Exeter 10 Mwe engines & ORC \ WID