Pyrolysis Reactor, 425 °C

Turn residual waste into fuel gas, bio-oil and char on sunlight. The reactor shreds residual municipal waste, pulls the ferrous metal out and pyrolyses the rest at 425 degrees Celsius, firing its own gas back as heat. The char goes on to the Atomic Cell.

2,675Tonnes of residual municipal waste a year
SunlightRuns on the array, 1 operator for the Cells
Pyrolysis Reactor Cell, front elevation

Shred, Pyrolyse, Pass On

  1. 1
    The Waste Arrives
    A tipper truck delivers residual municipal waste, after recycling and organics collection, and the reactor takes it in by the batch.
  2. 2
    The Shredder Runs
    The waste is shredded to under 50 millimetres, and a magnet pulls the ferrous metal out on the way through.
  3. 3
    The Reactor Pyrolyses
    The staging tray indexes into the reactor at 425 degrees Celsius. Every tonne gives up 89 kilograms of pyrolysis gas, 155 kilograms of bio-oil vapour, condensed in the finned condenser, and 117 kilograms of char.
  4. 4
    Its Own Gas Fires It
    The reactor needs 475 kilowatt hours of heat a tonne. Burning its own gas supplies 150 of them, so the array supplies 325.
  5. 5
    The Char Moves On
    The tray carries the char and the inorganic residue through to the Atomic Cell.

Specification

Temperature425 degrees Celsius
Heat475 kilowatt hours per tonne, 150 of them from its own pyrolysis gas
Intensity325 kilowatt hours of solar electricity per tonne
MaterialsOff the shelf components
PowerDirect current from the array, with zero inverters and no grid connection
DutySunlight hours
AcceptsResidual municipal waste after recycling and organics collection, under 30% moisture, shredded inside to under 50 millimetres. Large metals, hazardous waste and asbestos stay out

Five Cells and the Sun

Resource recovery: 5 Cells in a row with 1.5 megawatts of solar take in 2,675 tonnes a year of residual municipal waste and send out raw materials. Waste arrives by truck, a gate fee is paid to take it, and every atom leaves as a product.

Thermal 425

Pyrolysis Reactor, 425 °C

Takes the waste in, shreds it and pyrolyses it at 425 degrees Celsius into fuel gas, bio-oil and char.

Atomic

Atomic Vaporiser and Mass Separator

Vaporises the char and ash in a direct current arc, sorts the atoms by mass and condenses every element out on its own.

Fluid

Gas Separation Unit

Makes the 99% nitrogen the powder line and the bagging run under, 15 cubic metres an hour.

Thermal 1000

Calcining Kiln, 1,000 °C

Steam activates 17 kilograms of char a tonne into water filter grade activated carbon, 47 tonnes a year.

Mechanical

Crushing and Milling Plant

Crushes and screens the slag into aggregate, 358 tonnes a year.

Power

Sunlight

1.5 megawatts of direct current from the array, 1,971 megawatt hours a year, with no inverters, no grid connection and no fuel to buy.

Fuel Gas, Bio-oil and Char

Three products come out of the pyrolysis stage before any atom is vaporised. The gas runs the reactor, the bio-oil is sold as fuel, and the char becomes biochar and activated carbon.

What It Makes

  • Pyrolysis gas
    89 kilograms a tonne at 12 megajoules a kilogram, fired back into the reactor
  • Bio-oil
    155 kilograms a tonne. 73% is sold as light fuel and heavy asphalt after distillation, 302 tonnes a year; 27% is fired as heat
  • Char
    117 kilograms a tonne: 268 tonnes a year of biochar, and 47 tonnes a year of water filter grade activated carbon after steam activation in the Calcining Kiln

Front elevation

Pyrolysis Reactor Cell, front elevation, 12.2 metres long and 2.9 metres high