Our counter-reciprocating grate technology has been developed for the thermal treatment of a wide range of waste qualities and compositions. The counter-reciprocating movement of the grate bars ensures optimum stoking and air supply, ensuring complete burnout and low emissions. The modular design of the system provides a high degree of flexibility and plant availability.

Depending on the fuel composition, either air- or water-cooled grate bars are used. The design is tailored to each project on the basis of CFD*-supported simulations of the combustion process.

The main task of the boiler is to efficiently transfer the heat generated during combustion to water for steam production. It is vital to minimise contamination of the heating surfaces, as this can affect heat transfer and alter heat absorption in the boiler. Our steam generators are designed so that key process parameters such as fuel mass flow, exhaust gas temperature and hot steam parameters remain stable even under changing operating conditions.

Thanks to a proven process engineering concept with sufficiently dimensioned radiation chambers, low flue gas velocities and optimised pipe routing, our steam generators are long-lasting, easy to maintain and enable stable operation – without any additional auxiliary firing, even with varying waste quality.

The Doosan Lentjes grate ash remover ensures low-dust and low-odour discharge of hot grate ash after combustion. The ash is completely quenched in the integrated water surge tank. The robust design with replaceable wear plates ensures maintenance-friendly operation and a long service life. The ash remover is designed to work reliably even with difficult ash compositions – with low residual moisture in the separated ash.

Doosan Lentjes’ intelligent combustion control system automatically stabilises plant operation – even when fuel quality varies. Sensors and cameras continuously monitor temperature, flue gas values and grate movement. Among other things, the control system regulates fuel and air supply as well as grate speed on a segment-bysegment basis. This ensures constant steam output with low emissions, optimal combustion and high plant availability. The combustion control can be implemented either in a separate process control unit or in the central control system.