WTS AB – Multifuel burners



Four VTS burners before shipping.


Why Multifuel burners?


  • It gives the customer an opportunity to convert existing boilers into production units with renewable fuel at a lower capital cost than building a new boiler.
  • The existing fuel is still available and can always be used as back up or topping up.
  • When installing a new combustion system in an existing boiler the customer get a dual or triple fuel installation and can choose the most preferred fuel when he wants.
  • The burners are operated in automatic and fast responding to load changes.
  • The normal fuel are pellets and these have a high energy density compared to wet fuels, pellets can be stored at a small foot print, the flue gas flow is dry and the equipment is smaller than when firing wet fuels.
  • Low emissions of NOx and CO.
  • The availability is very high and maintenance costs are low
  • Fast load response, similar to oil and gas burners.
  • The split between powder/oil or powder/gas can be done independent from 0 –100%.

What type of boilers?

  • The best boilers to convert are water tube boilers since they have a better shaped furnace.
  • Fire tube boilers are possible to convert but the down rating can be quite large since these type of boilers are designed for a high thermal load.

What type of fuels?

  • The burners can be designed for gas, liquid and powder fuel. All three if the customer requires this.
  • The renewable fuels that can be used are biogas, bio oil and dry biomass milled to a fine powder. The limitations for powder are < 10% MC, particle distribution 100%< 1mm & 70% < 0,5mm.
  • Different fuel types for multi fuel burners:Powder: Wood, Agro, Peat, Bark & Coal

    -Oil:                                 HFO & Diesel

    : Natural Gas, Propane & Process gas
  • Burner sizes 2 MW – 50 MW /burner.

 Converting to WTS multifuel burner:

  • Existing boilers and furnaces can be used.
  • A conversion can normally be done fast and easy when replacing existing burners.
  • Changing the burners can be done at an appropriate time with continued use of the original fuel.
  • Powder handling can be completed with the burner in use and a transition can be made when powder is available.
  • The original fuel is always available to 100% and can be used as a backup or for topping up.
  • The plant is quickly started and quickly stopped with a turndown ratio of 1:4.
  • For new built plants the boilers can be smaller and requires a smaller foot print than wet biomass boilers.
  • No modifications are usually needed of buildings.
    New equipment can be optimally placed on the site.