Solar, Biomass and Hybrid Dryers - BioEnergy Discussion Lists

The ash scraper slides through a cylindrical guide bush, which is welded to the bodyof the reaction chamber. For easy assembling, the slider rod is connected to the‘fingers’ of the scraper by a threaded joint. The ash scraper is operated by sliding itin and out horizontally, generally once in 10-20 minutes, depending on the ashcontent of the fuel.4Guide bush1.6 inner dia.2.4 outer dia.ThreadedjointSlider rod,1.5Ø41063211Dimensions are in cmFigure 2.11: Ash scraper (with support bush)A door is provided below the grate level in the reaction chamber, to access the ashpit. The door, made of 2 mm thick mild steel sheet, is fixed to the reaction chamberbody using two hinges. A handle is welded to the door for easy opening and closing.The door is insulated with a refractory cement (Castable 13) layer of 1.5 cm thickness(Figure 2.12).1.513Refactory insulation(Castable 13), 1.5 thick211.5HingesDimensions are in cmFigure 2.12: Ash pit door (Inside view)12