The invention provides a
sludge paddle desiccation method, which comprises the following steps: loading wet
sludge into a
paddle desiccator with a charger, indirectly heating materials through a hollow blade heating shafts and a shell jacket with thermal medium, the heating shafts intermeshied and rotating, with squeezing and relaxation alternative action, materials dried and moving to a
discharge door
simultaneity. The wet share evaporated in
drying process is carried and discharged with carrying gas, and the carrying gas can enter from a carrying gas inlet or the
discharge door, and is ejected from exhaust outlet. The heating shafts of the
desiccator can be two shafts, or four shafts. The wet share discharged from the
desiccator is washed, dedusted and deodorizated with a washing
tower to reach the
emission standard, and evacuation with a induced fan. The invention has the characters such as small
energy consumption, low
operating cost, small equipment plot area and equipment investment, big operating flexibility, stable and reliable operation, little entrained dust and material depletion. The invention settles the technical roadblock of huge dedusting equipment, high
operating cost of hot-air
sludge desiccator or short periodic motion caused by frequently sticking wall in other sludge
desiccation. The invention not only make
drying in allusion to the characters of high
moisture content and high
viscosity of sludge, but also is suitable to dry industrial sludge such as
oil sludge, catalytic sludge, chemical sludge,
biochemistry sludge, and domestic sludge.