Method for two stage drying and recycling sludge using sparging paddle and ribbon paddle dryer

The present invention relates to a two-stage drying of the sludge, and more particularly, to a spa jingpae the dryer and method a two-stage drying of the sludge with the dryer ribbon panel. A two-stage drying of the sludge according to the invention (a) the step of drying in the primary drying the water content of more than 75% sludge until it has a moisture content of 35 to 50%; And (b) some of the water content of 35 to 50% sludge for the second secondary dryer outlet comprises a step of drying, the water content of not more than 10% in a dryer until the water content is less than 10% of the sludge is circulated is mixed with the imported sludge having a water content of 75% or more after the water content is adjusted to 55-65% may be input to the primary dryer. While drying of the sludge according to the present invention is to minimize the mechanical wear of the dryer, heat transfer surfaces in the steam temperature of the glue zone is a problem that occurs during an indirect heat drying due to (glue zone, sticky phase) by a scale formed by a coating it is possible to prevent the drying efficiency is lowered, the moisture content can be generated from sewage treatment plants or wastewater treatment plants efficiently dried in a lot of waste sludge.