DryEGCS
As can be seen from Figure 1, the exhaust gas is discharged into the reactor from the side and flows horizontally through the packed-bed from the granulate. The granulate is fed into the packed-bed reactor from above, removed from below and transferred to the residue stockage.
A one-stage as well as a two-stage construction is possible for the exhaust gas cleaning.
In a two-stage reactor the granulate of stage 1 is discharged at the bottom into a sieve drum and fed into stage 2. If both stages are installed side by side, the discharging speed can be adjusted separately for both stages. If required, the granulate of the first stage can be discharged more quickly. This also explains why the packed- bed cascade absorber can simultaneously take over the function of a diesel particle precipitator. The solid fraction separated in the sieve drum is also discharged into the residue silo. The exhaust gas is fed in to, and discharged out of, the absorber through triangle-shaped cascade channels. The channels are alternately closed at the housing wall so that the exhaust gas is constrained to flow through the granulate material layer.
The remaining time of the exhaust gas within the layer is approx. 3.7 seconds over both stages, which guarantees an almost complete removal of SOx. As illustrated in Fig. 1 the DryEGCS® will be installed directly downstream of the turbo charger at an exhaust gas temperature of approx. 240°C to 350°C.
In this configuration it is quite possible to install a significantly smaller catalyst by simultaneously extending the life-cycle.
