DETAILED PARAMETER OF THE LADDER GRATE(STEP GRATE) BIOMASS BOILER
BIOMASS BOILER CHARACTERISTICS
- STEP GRATE and LADDER GRATE for efficient and complete combustion of biomass fuel.
- Fuels can be wood chips, wood wastes, straws, shells or husks,palm fiber, palm fruit branches, etc.
- Special design combustion chamber and heating surfaces for high efficiency heat exchange.
- Thermal efficiency shall be more than 81%.
THE FOLLOWING PICTURES SHOWS LADDER GRATE OF SUCCESSFUL PROJECTS IN INDONESIA SINCE 2010
| DESIGN PARAMETER | ||
| Model: natural circulation, double drum, water tube steam boiler | SHL20-2.5/400-T | |
| Rated evaporation capacity | 20t/h | |
| Rated steam temperature | 400ºC | |
| Rated steam pressure | 2.5Mpa | |
| Rated feed water temperature | 105ºC | |
| Cold air temperature | 20ºC | |
| Hot air temperature | 163 ºC | |
| Design efficiency | 81.8% | |
| Combustion type | step grate(ladder grate) firing | |
| HEATING SURFACE AREA | ||
| Radiation heating surface | 97.4 m2 | |
| Convection heating surface | 345.6 m2 | |
| Economizer | 123.5 m2 | |
| Air pre-heater | 608.5 m2 | |
| superheater | 121 m2 | |
| FUEL PARAMETER | ||
| fuel | palm firber, palm fruit branches,woodchips. | |
| Moisture | <45%. | |
| Wood Size: | <50X50X25mm3. | |
| Net calorific value: | >2500Kcal/ Kg. | |
| l THE ABOVE PARAMETER IS ONLY FOR REFFERENCE l SUBJECT TO FINAL DESIGN | ||
BIOMASS BOILER CHARACTERISTICS
- STEP GRATE and LADDER GRATE for efficient and complete combustion of biomass fuel.
- Fuels can be wood chips, wood wastes, straws, shells or husks,palm fiber, palm fruit branches, etc.
- Special design combustion chamber and heating surfaces for high efficiency heat exchange.
- Thermal efficiency shall be more than 81%.
THE FOLLOWING PICTURES SHOWS LADDER GRATE OF SUCCESSFUL PROJECTS IN INDONESIA SINCE 2010