Stirling Boiler

Figure 3.6 shows the Stirling boiler, which comes in a water tube type in which three steam drums are connected together by the banks of bent water tubes. These tubes stand nearly in a vertical position near the rear end while they slope steeply over the fire at the front end. The baffles deflect the products of combustion from the furnace over the banks of tubes into the mud drum. The steam generated collects in the steam spaces of the three drums. The steam can be raised at a working pressure of 60 bar with the temperature as high as 450°C. An evaporation capacity of 50,000 kg/h has been achieved with a Stirling boiler.