Microwave sludge drying device

The utility model discloses a microwave sludge drying device. A microwave generator (6) is arranged on one side of the inner wall of the microwave treatment cavity (5), a sludge feeding port is connected with a high-pressure sludge pump (13) through a conveying pipeline (11), and the tail end of the conveying pipeline (11) is connected with a slurry nozzle (3); a discharge port (16) is formed in the bottom of the microwave treatment cavity (5); and a compressed air pipeline (15) is arranged at the lower part of the sludge feeding hole, the tail end of the compressed air pipeline (15) is connected with an air nozzle (4), the air nozzle (4) faces upwards and is arranged below the sludge nozzle (3) and in the microwave treatment cavity (5), and the compressed air pipeline (15) is arranged below the conveying pipeline (11). Sludge is scattered into fine particles through the nozzles, the specific surface area of heating is increased during microwave drying, the dried sludge is not prone to caking, and the drying