econ industries services GmbH

Oil recovery from various oil contaminated soils and wastes - Case study


Courtesy of econ industries services GmbH

A waste management company from Australia was looking for an environmentally friendly solution for oily waste with low emissions and a low carbon foot print. To save installation and commissioning time econ realized a preinstalled modular VacuDry® unit with a capacity of up to 6 tons/hr. The plant is designed for maximum flexibility and it is able to treat different types of refinery waste ranging from dry soil to wet centrifuge cake.

The VacuDry® plant is equipped wiih two VacuDry® 12,000 dryers. The input material mainly contains diverse hydrocarbon fractions from various sources. After separation the recovered oil can be sold to the refinery or it can be reused. The cleaned mineral residues have a hydrocarbon concentration (C6-C36) of less than 0.5 percent.

Because of the long distance our engineers paid special attention to low maintenance efforts and service demand. Therefore the robust VacuDry® plant is equipped with modem control technology: in urgent cases our econeers have online access to the PLC unit. The specially developed modular concept saved time during the construction and commissioning period as well as transport costs and staff needed on site. Since the VacuDry® unit is a closed system there are almost no emissions. Also, the energy consumption is very low compared to other treatment systems. Hence it got the approval to operate close to a residential area.

Performance data

  • Vacuum dryer type: 2 xVacuDry* 12.000
  • Batch size: 2x10,000 litres
  • Heating system: 400 °C thermal oil unit - heated by natural gas
  • Operating pressure: 50 - 800 mbar (abs)
  • TPH content output: C6-C36<0.5%

Oil recovery from various oil contaminated soils and wastes - Case study


Design characteristics

  • Designed for hydrocarbon contaminated soil and sludge
  • Separation of hydrocarbons for reutilisation
  • Specially designed high temperature discharge system for accelerated batch times
  • Redundant vacuum and cooling water system for highest plant availability
  • Emission and dust free system through encapsulated treatment of exhaust vapours and solid materia
  • Plant fulfills ATEX requirements for Zone 2 operation

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