Equipment

Joest offers variety of options in waste incineration

In the north of England, an existing power plant was expanded to include a second waste incineration plant for household and industrial waste.

Mass-compensated resonance conveyors (FSM) from Joest were the choice to separate the coarse and fine waste slag.

The expanded Ferrybridge energy from waste (EfW) plant near Manchester incinerates about 600,000 tonnes of waste each year and converts it into energy.

To transport the waste, four FSMs from Joest are installed to carry out the initial separation of the coarse and fine waste slag in order to protect the conveyor belts.

Two conveyor belts, which are positioned below the resonance conveyors, are fed by the two split grates that are installed in each resonance conveyor.

Since the belts do not run in parallel due to the distribution of the waste, it was necessary to ensure that only one is constantly being fed, and that the changeover between the two conveyor belts can take place within a very short time. For this reason, Joest developed special cover plates that make it possible to complete the changeover on all four machines with a system downtime of 20 minutes.

Joest’s experience in the design of vibrating equipment for use at elevated temperatures was key to providing a reliable solution.

During the development phase, particular attention was paid to the high demands placed on the welding technology, as well as the painting and coating of the system. In terms of the welding results, it was important to ensure a robust design, as sometimes larger parts are transported on the resonance conveyor.

The waste slag is also chemically aggressive, which is why it was essential to apply a durable coating. The on-site conditions presented an additional problem — it was not possible to attach the motor and crank drive in series underneath the machine due to a lack of space.

As a result, the machine had to be redesigned so that the motor could be attached vertically to the machine, underneath the drive unit.