State-of-the-art wood-based energy solutions

Do you have old power generators in use and would like to replace or expand them with a proven and reliable technology of the latest generation?

Then you've come to the right place!

Our Biomass CHP have proven themselves worldwide and generate electricity and heat from almost every natural wood. They are extremely flexible in their application: you can combine our wood gasifiers with an existing combined heat and power unit (CHP) as well as integrate wood gasifier and wood-fired CHP into an existing project.

Benefit from the plant reliability of our technology and increase your energy efficiency for a higher power and heat yield with repowering. Our combined heat and power plants require only wood as an energy source. It’s a sustainable fuel that is not only environmentally and climate-friendly, but also strengthens the regional economy.


Replace expensive diesel generators in metal mines with Re² Biomass CHP units

  • Initial situation: metal mines without connection to the public power grid.
    Constraints: Base load for electricity is around 4.5 MW, peak load approx. 7 MW; previous power supply from wind power, hydropower and diesel aggregates.
  • Problem: Over 50 % of the total electricity demand generates from diesel generators; the import of diesel is very expensive and not sustainable; wind power and hydropower are depending on weather conditions.
  • Project plans - Step 1: Use of Re² wood gasifiers (HKA 70) instead of a 1.2 MW diesel generator;
    Step 2: Further substitution of a 1.2 MW CAT diesel unit with wood gasifier from Re².


400 employees work in three-shifts to operate the mine, which is not connected to the public power grid. Around 4.5 MW of electricity is continuously required to mine for zinc and gold, and at peak times up to 7 MW is consumed. To date, most of the electricity has been generated from five CAT diesel generators. The generators are inefficient to run because the import of diesel is very expensive, complex and not very environmentally conscious.

Up to 5 % of mine energy requirements have been covered by wind power plants since 2010, although these are highly dependent on prevailing weather conditions. In addition, there are three hydropower plants that provide eco-friendly energy.

The energy demand fluctuates significantly. Electricity and heat should be generated independently of the weather and in an environmentally friendly manner. Therefore, the mine operator intends to rely on the proven wood-power technology of Re² - the leading manufacturer of Biomass CHP units.

Several wood-fired gasification plants replace diesel generators with an electrical output of 1.2 MW in two project phases. The multiple systems are connected in a cascade and operated both simultaneously and independently of each other. They produce energy as required and are extremely flexible. Wood from the local area serves as the energy source, ensuring the region benefits.

Compared to a single large-scale plant, multiple Re² plants offer advantages in flexibility, but also in terms of service. This can be carried out on site and also on the series-produced 6.3 litre turbo engines with charge cooler, which are installed in the powerful combined heat and power plants of Re² (no expensive specialist is required). System availability is also ensured during maintenance work and amounts to over 90% throughout, ensuring a reliable energy supply.

Biomass CHP units from Re² are extremely fuel flexible and can be operated with any natural wood. With the patented technology, energy can also be generated ecologically and economically in remote regions, when it is needed.
So far, most of the electricity is generated in the mine by CAT diesel generators. Biomass CHP units from Re², which generate electricity and heat from wood chips, are an excellent way of replacing diesel generators and generating energy on the basis of wood gas as required.

 Replace expensive  diesel generators in metal mines with Re² Biomass CHP units

So far, most of the electricity is generated in the mine by CAT diesel generators. Biomass CHP units from Re², which generate electricity and heat from wood chips, are an excellent way of replacing diesel generators and generating energy on the basis of wood gas as required.

Re² repowering in practice
Data on the repowering project in Germany:

  • Local heating network operators with good access to wood fuel
  • Starting position: a wood gasifier and CHP unit from external company from 2009-2016 was in use
  • Problem: existing plant did not work, no smooth operation possible
  • 2016: replacement of the existing carburetor with 3 x Re² wood gasifier, integration of a new control unit as well as conveying and discharge technology

As part of the repowering project, the originally installed wood gas generator from an external company was replaced by three wood gasifiers from Spanner Re² GmbH. Each with an electrical output of 45 kW, and extended by an efficient conveying and discharge system from Re². The ignition-jet CHP unit with an output of around 250 kW remained in place. A superordinate, intelligent control system from Re² acts as a communication interface between the new wood gasification unit, conveying and discharge technology and existing CHP units.

Thanks to the successful repowering project, a reliable energy supply can now be guaranteed. The heat generated from wood is transferred to the consumers via a local heating network. The wood chips are processed by the operator come from their own forest. With this innovative energy solution, the operator is able to optimise its added value and generate a lucrative source of income

 
repowering 3 600px
For efficient gasification of wood, it must have a water content of around 10%. Fuel drying can be carried out, for example, with the waste heat from the Biomass CHP. The wood chips are fed to the three wood gasifier via a Re² multiple distributor. The conveying and discharge technology is manufactured by Spanner Re² GmbH and is optimally matched to the gasifiers.

 

Combine Re²'s wood gasifier with a large combined heat and power plant (CHP) – with our wood-power-plant it is all possible!

Larger CHP modules with an electrical output of 500 kW to 2 MW can also be operated on a wood gas basis, both for planned projects and within the scope of repowering.