Sigma - Wood gasifying boiler

Power: 20kW, 30kW, 50kW

Sigma boilers are devices that use to burn wood logs in the process of gasification.
Modern wood gasification boilers are up to 2 times more efficient than traditional methods of combustion and emission of harmful substances into the atmosphere is much lower. When burning wood with a limited air supply Thermochemical processes occur that result in the production of wood gas.
This gas is directed to the burner nozzle where it mixed with air to form a gas flame at the bottom of the boiler. Sigma wood gasification unit fully utilize a closed fuel energy which allows for the highest emission parameters.

Sigma boilers are devices that use to burn wood logs in the process of gasification.
Modern wood gasification boilers are up to 2 times more efficient than traditional methods of combustion and emission of harmful substances into the atmosphere is much lower. When burning wood with a limited air supply Thermochemical processes occur that result in the production of wood gas.
This gas is directed to the burner nozzle where it mixed with air to form a gas flame at the bottom of the boiler. Sigma wood gasification unit fully utilize a closed fuel energy which allows for the highest emission parameters.

Features

The wood gas (german. holzgas) comes in the process of gasifing of the wood. This is the mixture of flammable gases: the oxide of carbon, hydrogen and methane, and also incombustible -- nitrogen, the dioxide of carbon, water steam. The composition of the gas depends on many factors as: from current temperature in the hearth of the gas generator, the moisture of the loaded fuel and other.
The gasifing of solid fuels is technology counting above 200 years. On the beginning XIX w. it was used so-called urban gas to the supply of cookers, street lamp and to industrial aims. It was produced from the carbon then. Generally -- the artificially formed gas from the gasifing of the solid fuel is called the generator gas

Sigma gasifying boilers were designed in Sweden to burn 50 cm log wood.  Boiler of type SIGMA Holzgas on first throw of the uninitiated eye does not differ from the usual boiler on the wood. It has hearth, loading chamber and ash-pan. The difference of working is however considerable -- it burns in it not from the bottom to the top, but inversely. There is the loading chamber at the top and the
transformation of the wood follows in the wood gas in this chamber. There is the nozzle below the chamber in which burning the wood gas mixed previously with the air, which flows in from outside, follows. This element is made from the heat-proof material. There is the ash-pan, in which burning down the mixture of the wood gas with the air follows, under the nozzle. The boiler on the wood gas
from the back possesses accompanying flue gas to the chimney, in this place the exchanger of warmth allowing to the heating of water from hot flue gas is assembled.

Features of our product:

  • designed in Sweden, tested in Germany  - boiler is in TUV proved.
  • 5 class of emission
  • big loading chamber designed for 50 cm log wood
  • built in exhaust ventilator helps to avoid smoke by start up
  • optional:  cooling loop and lambda sensor
  • clean combustion thanks gasyfication process
  • full power modulation of boiler


2 controllers:

  • basic with pump steering /overheating protection
  • extended with mixer controller
  • LCD display
  • ambda or flue gases sensor

Construction

  1. Combustion chamber/ash pan door
  2. Ceramics
  3. Primary and secondary air regulation (Fans in SIGMA 50)
  4. Ceramical burner with secondary air nozzles
  5. Primary air supply
  6. Loading chamber door
  7. Controller
  8. Safety cooling coil (option)
  9. Upper cleaning hole
  10. Easy firing up flap with easy cleaning mechanism                                     
  11. Smoke conduit
  12. Exhaust fan (20/30kW models)
  13. Turbulizers
  14. Water coat
  15. Thermal insulation
  16. Lower cleaning hole
Sigma Construstion