Next generation strawfired boilers for district heating
The aim of this project is to contribute to the development of a new generation of grate fired straw plants that comply with stringent emission regulations and offer stable operation as well as increased thermal efficiencies.
The project is a research and development project aiming on improvements in straw fired boilers for district heating. The aim is to enable manufacturers of boiler equipment and control systems for boilers to develop a new generation of equipment, which has significantly better properties in terms of combustion quality and reduction of emissions. A secondary target is to improve the systems efficiency, to try to maintain investment costs at the present level, even for the improved systems and to improve plant reliability. The working programme consists of a series of development activities on individual improvements on the boilers, each targeted at enabling the manufacturer to finish the product development. Project work is continuation of a series of working development meetings between end users, manufacturers and development facilitator dk-TEKNIK in the period 2000-2002. The development work starts May 2003
A large number of straw fired district heating plants have been in operation in Denmark for more than 20 years. Plenty of operational experience has been obtained, but the combustion technology has not significantly developed since the first generation plants. The aim of this project is to contribute to the development of a new generation of grate fired straw plants that comply with stringent emission regulations and offer stable operation as well as increased thermal efficiencies. A new furnace design for chipped straw with advanced possibilities for air distribution and control has been studied in the present work. A measurement campaign was carried out, including measurement of local furnace temperatures and concentrations of CO, O2 and NO. A CFD model was developed and tuned using the measurements. The model was applied to study control strategies for air distribution. Development of controls for primary reduction of NO is of particular interest
Key figures
Participants
| Partner | Subsidy | Auto financing |
|---|---|---|
| Dansk Fjernvarme | ||
| LINKA MASKINFABRIK A/S | ||
| Danstoker, Herning (DK) | ||
| WEISS A/S |
Contact
Gladsaxe Møllevej 15
DK-2860 Søborg, Denmark
Videcrantz, Gitte , 39555999, gv@force.dk
Øvr. Partnere: Danske Fjernvarmeværkers Forening
