Method of drying sludge and apparatus for carrying out the method

The invention claims a sewage sludge dried with the method and device wherein the drying method comprises: At least through injection saturated water steam the sealing machine shell the pressure increased to a certain pressure and the pressure is kept the special of a period of time period; Through so as to ensure the pressure maintaining feeding device of the sludge is set in the far away from the shell wall of the tank in the stage of; By depending on the near the tank wall is corresponding to the microwave source furthest the movement of the injection device comprises stirring device to the overheating steam injection in sludge the stage of; Tank through towards the direction of the transmission frequency mhz as 400*2450 of the microwave to heat the sludge in the center of the stage of the stage and the agitating sludge together execute; By the machine shell on the wall of the condenser and flows out from the collected water depending on the external valve connected to the removing of the bottom of shell stages of.