Stronga Drying Solutions – Producing high calorific fuel from SRF and other waste streams

  • by stronga
  • Posted in: FlowDrya
  • 0
July, 2015

Stronga help customers fulfil their zero waste to landfill ambitions by producing high calorific fuel from waste using our proven, high performance drying solutions. Resulting dry products are used to produce energy at recovery facilities, helping clients to reduce their reliance on fossil fuels and avoid landfilling residual waste.

Stronga FlowDrya SRF drying


Municipal Solid Waste (MSW) is considered as valuable raw material for the production of energy. Sorting MSW produces waste streams, including saleable recyclable materials, non-recyclable materials for landfill, and high calorific Solid Recovered Fuel (SRF) and Refuse Derived Fuel (RDF).

SRF and RDF. Explained

Solid Recovered Fuel (SRF) is produced from commercial waste such as paper, textiles and plastic. With a moisture content of less than 15%, SRF has a high calorific value and is primarily used in cement kilns. SRF can be produced to a range of specifications to meet requirements.

Refuse Derived Fuel (RDF) is produced from domestic waste such as biodegradable materials and plastics. RDF is used in Combined Heat and Power (CHP) facilities where electricity and hot water are produced for communal heating systems. This approach produces far fewer carbon emissions.

SRF material

Drying waste to fuel

High calorific SRF and RDF is becoming a popular energy solution to reduce the consumption of non-renewable fossil fuels, particularly in modern waste to energy plants and cement kiln facilities. Stronga FlowDrya is highly efficient and individually adaptable for drying SRF and RDF. Watch Stronga FlowDrya dry RDF in the the video below:

One benefit of converting waste to fuel is that the FlowDrya owner avoids expenses associated with waste disposal. Disposal expenses include landfill tax; landfill transport costs; and the cost of machinery damage on the landfill site. The client also has the added benefit of converting a wasted product into high added value fuel.

Stronga FlowDrya SRF drying

FlowDrya RDF drying

  1. Municipal Solid Waste (MSW) is pre-sorted into 3 primary waste streams.
    1. Saleable recyclable materials (including wood and metals).
    2. Non-recyclable material to be sent to landfill.
    3. High calorific Solid Recovered Fuel (SRF) and Refuse Derived Fuel (RDF).
  2. Saturated RDF is loaded into the pre-mixing and pre-heating FlowDrya hopper to initiate evaporative drying.

Stronga FlowDrya SRF in the hopper

  1. RDF to be dried is delivered under an adjustable depth control weir gate onto the moving drying bed.

Stronga FlowDrya SRF adjustable gate

  1. On the FlowDrya moving drying bed, RDF flows in a unique PulseWave motion which mixes and inverts the material for a consistently uniform dry output.
Stronga FlowDrya SRF drying
  1. A flux of warm drying quality air flows from the attached Heatex air control module, up through the ventilated moving drying bed and directly into the RDF, drying to the required moisture content.
Stronga FlowDrya and Heatex
  1. Dry soil fuel and RDF output can be discharged via optional onward conveying systems.

Stronga FlowDrya SRF discharge

  1. Dry SRF output can be shredded, baled and wrapped in plastic film to ensure the moisture content remains at the required level.

SRF baling

  1. RDF and SRF bales can be combusted to produce electricity in environments that meet the Waste Incineration Directive such as the cement kiln industry.

SRF material

  1. SRF bales can also be fed into pyrolysis plants and gasification modules where they are cleanly combusted.

Renewable Heat Incentive (RHI)

Stronga FlowDrya is fully compatible for use with UK’s Renewable Heat Incentive (RHI) scheme. Our team support clients with RHI application by connecting them with our network of advisers, and providing technical data and thermal calculations.

Renewable Heat Incentive (RHI)

According to the UK Government’s RHI scheme, only Municipal Solid Waste (MSW) such as Solid Recovered Fuel (SRF) and wastes which are at least 90% biomass are eligible. The UK Government’s RHI announcement reads…

“Eligible waste feedstock for combustion, gasification and pyrolysis will be limited to solid biomass from Municipal Solid Waste (MSW), including Solid Recovered Fuel (SRF) from MSW. 

In addition, other wastes where at least 90 per cent of their energy content is comprised of solid biomass will receive support. Examples of such wastes include waste wood and residues from the paper manufacturing industry”

Whole system drying solutions

Our approach of matching equipment to the needs of the client delivers the most efficient whole system drying solution. There are 2 primary components of the Stronga drying system:

  1. Heatex – Air control module designed to optimise drying via optimal air temperature, flow and pressure.
  2. FlowDrya – All-in-one dryer, offering great value in the form of lowest cost per tonne dried.

1.Stronga Heatex2.  Stronga FlowDrya

All-in-one FlowDrya

Stronga FlowDrya is designed for optimum efficiency and performance, offering great value in the form of lowest cost per tonne dried. All-in-one FlowDrya ensures superb drying versatility, extending the client’s ability to dry a range of materials.

Stronga FlowDrya is a low temperature, low energy drying solution, ensuring safe and efficient drying of SRF and RDF streams. FlowDrya can be fitted with optional roof and flue arrangements and supplemented with additional bio filter modules to reduce the SRF and RDF emission characteristics during drying.

Stronga FlowDrya

Unlimited drying possibilities

In addition to Solid Recovered Fuel and Refuse Derived Fuel streams, FlowDrya can dry a whole range of materials, leading to long-term financial profitability and productivity. Discover a few of the drying possibilities.

Wood chip, wood shavings, sawdust, bark, cereals, fruits, nuts, compost, poultry manure, separated and raw digestate, sewage sludge, organic fraction waste and much, much more.

Wet materials for drying

Discover more

If you are interested in Stronga FlowDrya for drying Solid Recovered Fuel (SRF) , Refuse Derived Fuel (RDF) or any other material, contact our friendly advisers for professional support. Stronga require certain information to allow us to advise clients on establishing thermally efficient drying solutions. Click the button below to contact the Stronga technical team.

Contact Stronga F T YT