Ash extraction system

Ash removal takes place on the one hand underneath the grate, where however, thanks to the excellent density of grate elements, only low amounts of ash are to be expected that drop through the air gaps. Discharge of the ejected slag is done by means of a so-called push discharger.

Without dust and odour

As the slag is held in the dry section of the ash discharger, for a long time, it is possible to ensure that it can be moved in a virtually dry consistency to the ash collection device over a connecting rubber conveyor belt.

The push discharger is fitted with exchangeable wear and casing plates as well as wear strips on the discharge ram. Drive is by means of the hydraulic unit in the incineration grate. The push discharger is filled with water up to the front end wall, which prevents air entering the combustion chamber. The fully extinguished grate slag can then be discharged without dust and odour.

The burnt-off, hot grate slag is ejected from the burn-off grate into the water bath in the push discharger. The grate slag is then fully extinguished in the water bath. The discharge ram pushes the grate slag under the end wall through to the slag ejection edge.

Discharged moist but not wet state

All water-bearing ash discharge systems have a draining device at the lowest point. This allows the ash water to be discharged into the drainage lines on site and collected in a container on site.

The above-mentioned design layout is based on relevant experience at existing plants, where chain or apron conveyors were frequently used for slag removal and which led to considerable problems. Use of a slat conveyor is another option of course, but this involves disadvantages which should be discussed on an individual basis.