Waste Storage and Feeding
Once the waste is lifted from the reception storage, the first step is waste sorting. This can be done either manually or automatically. The purpose is to remove all non-combustible material, such as metals, glass, electronic waste etc. These have no calorific value and can only impair the combustion process. These materials are then recycled as raw materials. The remaining combustible waste material is crushed to suitable particle size.
The waste feeding process has three different buffer stocks to ensure fluent operation, while reducing operating costs:
1. Waste field or reception bunker holds enough material for two weeks’ operation, i.e. 1,400 tons
2. Dosing buffer storage contains fuel for approximately five hours’ operation (20 tons)
3. Combustion feeding chute carries four tons at a time lasting about one hour
Under normal operating conditions the waste (fuel) flows from storage to combustion via a conveyor system automatically. During feeding system maintenance or hardware failures, waste can be moved and fed with a front-loader.