Pyrtec

Underfeed firing system 390 to 1250 kW

By com­bin­ing the mov­ing for­ward feed grate with the proven fir­ing depres­sion and falling out­er grate, the Pyrtec opti­mal­ly unites the advan­tages of the mov­ing grate fir­ing sys­tem with the under­feed fir­ing sys­tem. An infeed screw trans­ports the wood fuel to the fir­ing depres­sion of the wood heat­ing sec­tion, where it is pre-dried. On the out­er grate and the mov­ing for­ward feed grate, the fuel is com­plete­ly degasi­fied. The wood gas­es are then com­bust­ed with the reg­u­lat­ed injec­tion of sec­ondary air.

Underfeed firing system Pyrtec

Maximum quality of design and manufacture

Fuels:
Wood pel­lets
Wood chips
Wood shav­ings and mixed wood

Com­bin­ing the mov­ing for­ward feed grate with the proven fir­ing depres­sion and falling out­er grate opti­mal­ly unites the advan­tages of a mov­ing grate fir­ing sys­tem with the under­feed fir­ing sys­tem.

Clean and efficient combustion

The com­bus­tion tech­nol­o­gy of the Pyrtec achieves low emis­sions val­ues (espe­cial­ly for CO and NOx). Oper­a­tion with mod­u­lat­ing out­put reg­u­la­tion and an opti­mised com­bus­tion prin­ci­ple enables an effi­cien­cy of up to 92%.

Design and function

The Pyrtec wood-fired boil­er is a qual­i­ty prod­uct for the harsh­est con­di­tions (high fuel flex­i­bil­i­ty from M10 to M50). The fire­box is lined with pressed and baked ceram­ic bricks that have a high alu­mini­um oxide con­tent for high­er resis­tance. All grate ele­ments are made of high-qual­i­ty, thick cast­ings of chromi­um steel and are able to with­stand high tem­per­a­tures. The Pyrtec wood heat­ing boil­er fea­tures a three-pass heat exchang­er for max­i­mum ther­mal trans­mis­sion and effi­cien­cy.

Boiler control

The boil­er is con­trolled by the com­plete­ly pro­gram­ma­ble mod­u­lat­ing out­put and sys­tem con­troller. This con­trols all vari­able-speed blow­ers as well as the fuel feed­ing mech­a­nism. It also mon­i­tors the fol­low­ing:

  • Sup­ply and return tem­per­a­ture of the wood-fired boil­er
  • Light bar­ri­ers of the infeed sys­tem
  • Pres­sure sen­sor for reli­able under­pres­sure
  • Flue gas tem­per­a­ture
  • Fire­box sen­sor (upper tem­per­a­ture lim­it)
  • Oxy­gen con­tent of the flue gas (lamb­da probe)

Design and output ratings

Type Out­put range*
Pyrtec 390 130 to 390 kW
Pyrtec 530 177 to 530 kW
Pyrtec 720 240 to 720 kW
Pyrtec 950 317 to 950 kW
Pyrtec 1250 417 to 1250 kW

*Depend­ing on fuel and water con­tent

Pyrtec

Mod­el Pyrtec 390 Pyrtec 530 Pyrtec 720 Pyrtec 950 Pyrtec 1250
Rat­ed ther­mal out­put 390 530 720 950 1250 kW
Dimen­sions
Length 3282 3782 3877 3835 4380 mm
Width 1274 1274 1380 1612 1612 mm
Height 2378 2536 2834 3035 3230 mm
Weight 5230 7554 8869 11463 12918 kg
Max­i­mum oper­at­ing pres­sure 6 6 6 6 6 bar
Sectional drawing UF
  1. Infeed screw with bar­ri­er lay­er
  2. Fir­ing depres­sion with inner grate and pri­ma­ry air 1
  3. Out­er grate with pri­ma­ry air 2
  4. Mov­ing for­ward feed grate
  5. Sec­ondary air
  6. Igni­tion blow­er
  7. Ash dis­charge
  8. High-tem­per­a­ture zone for com­plete com­bus­tion
  9. Fire­box door
  10. Three-pass boil­er
  11. Safe­ty heat exchang­er
  12. Pneu­mat­ic boil­er tube dedust­ing

Profit from these benefits:

  • Ful­ly auto­mat­ic wood-fired boil­er with grate fir­ing
  • Nom­i­nal heat out­put range: 390 to 1250 kW
  • For the use of wood fuels with a water con­tent of up to 50% (M50)
  • High effi­cien­cy thanks to proven com­bus­tion tech­nol­o­gy, three-pass heat exchang­er, mod­u­lat­ing out­put reg­u­la­tion and reg­u­lat­ed pri­ma­ry and sec­ondary air sup­ply
  • Max­i­mum oper­at­ing pres­sure: 6 bar
  • Sim­ple main­te­nance thanks to ful­ly auto­mat­ic ash removal and option­al pneu­mat­ic clean­ing sys­tem
  • High­ly engi­neered safe­ty equip­ment enables safe and reli­able oper­a­tion
  • All sys­tem com­po­nents are built and sup­plied by a sin­gle provider for opti­mal sys­tem per­for­mance
  • Auto­mat­ic igni­tion sys­tem elim­i­nates con­tin­u­ous burn­ing and saves fuel (option – only for fuels with less than 40% water con­tent)
  • Out­stand­ing out­put reg­u­la­tion from 30 to 100%

Ques­tions?

Example installation

Local heating network

Fir­ing sys­tem: Pyrtec
Out­put: 530 kW
Fuel: Nat­ur­al chips

Anlagenbeispiel UF
  1. Fuel stor­age in a silo
  2. Fuel dis­charge with push rod
  3. Fuel trans­port with screw sys­tem
  4. Fir­ing sys­tem: Pyrtec
  5. Ash removal from com­bus­tion cham­ber into 240 or 800 l con­tain­er
  6. Flue gas dust removal with mul­ti­cy­clone sep­a­ra­tor

Areas of application

Wood indus­try

Local and dis­trict heat­ing

Pub­lic devel­op­ers

Hos­pi­tal­i­ty

Nurs­eries