Lower cyclone heat exchanger

Lower, in height reduced, heat exchanger for preheating of powdered raw material composed from a system of cyclones, where the exchanger is divided into two parts, to a high temperature part closer to the hot gas source and to a low temperature part, where each part is composed from at least two serially one after the other arranged cyclones which are oil different height level and which are mutually interconnected with a connecting tube of hot gas such a way, that the input of first cyclone is connected to the hot gas source and the output from each cyclone is assigned to the input of next cyclone, where the output of separated powdered raw material is from each cyclone led to the beginning of the tube assigned to the output of hot gas from the previous cyclone and that the high temperature part and low temperature part of the exchanger are mutually interconnected with an interconnecting tube and the two parts are situated in different height level so, that the input to the low temperature part is situated lower as the output from the high temperature part and that the high temperature part is further provided with a transport tube, which is ended to the tube, connecting the supply of hot gas to its highest cyclone and to which the output tube of low temperature part of heat exchanger is ended, characterized by that the lowest member of low temperature part (2) is composed from a counter current shaft exchanger (20), where its output (202) is ended to the transport tube (50).