Un­d­er­feed firing UTSP vi­sio

The compact and reliable wood firing system for pellets.

Field of application
Commercial and industrial / public / local and district heating
Fuel
Pellets
Operating medium
Hot water / Hot water
Power range
180 - 900 kW
Fuel water content
M 10
Grate cooling
Air
Anlagenbild Seitenansicht einer Unterschubfeuerung UTSK visio

Pro­duct de­tails

  • Firing tray ash removal by means of burnout grate
  • Wear resistance due to generously dimensioned combustion chamber
  • Modulating power control from 30 to 100
  • High filter availability due to exhaust gas bypass
Querschnitt einer Unterschubfeuerung des Produkttyps UTSK visio von Schmid.

1. stoking with stoker
2. fire trough with large grate ribs and primary air supply
3. burnout grate
4. combustion chamber
5. secondary air inlet
6. radiation vault
7. ‘3 draughtheat exchanger
8. controlled boiler bypass (optional)
9. multicyclone with automatic discharge of fly ash
10. boiler door with pneumatic boiler tube cleaning system
11. furnace door with safety lock
12. automatic discharge of grate ash into ash garbage can or ash container

Anlagenbild Seitenansicht einer Unterschubfeuerung UTSK visio

13. ash garbage can or ash container.
14. boiler cladding for reduced radiation loss and noise emissions
15. air intake openings
16. pressure relief damper
17. automatic pressure surge cleaning boiler bypass (optional)
18. pressure relief flap
19. cleaning opening on both sides for multicyclone

Anlagenbild Seitenansicht einer Unterschubfeuerung UTSK visio

13. ash garbage can or container
14. boiler cladding for reduced radiation loss and noise emissions
17. automatic pressure surge cleaning boiler bypass (optional)
18. cleaning opening on both sides for multicyclone
19. flue gas recovery
20. fly ash garbage can

Un­d­er­feed firing UTSP vi­sio

The UTSP visio plant operates on the principle of underfeed combustion. The pellets are fed from below into a combustion retort made of high-alloy cast iron. The complete combustion chamber is lined with refractory material and ensures a high firing temperature.

The primary air is fed through the cast bars in the combustion retort, where it produces a quiet gasification of the combustion material. The secondary air supplied in the combustion chamber ensures optimum burnout and thus low emission values. Ash removal takes place via a burnout grate. An ash screw is arranged under the burnout grate, with which the ash is conveyed directly into an ash bucket or into a container.

The firing unit is completely surrounded by the primary and secondary air and, together with the effective insulation, ensures minimal radiation. A well-dimensioned 3-pass flue tube boiler is mounted above the firing unit.