BAG FILTER FOR CLASSIFICATION

摘要

PROBLEM TO BE SOLVED: To reduce an equipment cost of a granulation drying system, and to secure stability of the system by separating granular sludge having a predetermined grain size from dried sludge.SOLUTION: There is provided a bag filter 14 for classification installed in a granulation drying system 10 in which: dewatered sludge and dried sludge A are kneaded and granulated using a mixer 12 and then dried with a drying drum 13 to produce dried sludge B; and some of granular sludge contained in the dried sludge B are taken out as a product, while dried sludge A other than the product is supplied to the mixer 12. The bag filter 14 for classification comprises a classifying unit 20 for separating granular sludge having a predetermined grain size or larger from the dried sludge B discharged from the drying drum 13 together with a drying gas, and a collecting unit 21 having a plurality of filters for collecting dried sludge C having passed through the classifying unit 20.SELECTED DRAWING: Figure 1