SLUDGE DRYING INSTALLATION

摘要

PROBLEM TO BE SOLVED: To provide a sludge drying installation which reduces the temperature variation of dried exhaust gas and allows stabilization of the treatment capacity of the whole system.SOLUTION: A sludge drying installation 1 includes a disintegrator 31 which dries sludge with circulated air and disintegrates the sludge and sludge circulation paths 82 to 85 for connecting the upstream and downstream of the disintegrator together and also is provided with a heat exchange line 88A which supplies circulated air before temperature raising to the heat exchanger 50 and returns the circulated air after temperature raising to the sludge circulation path and a bypass line 88B which returns the circulated air to the sludge circulation path without passing through the heat exchanger 50. The sludge drying installation 1 is provided with control means of controlling the supply amount of the circulated air supplied to the heat exchange line 88A, and the control means controls the supply amount of the circulated air supplied to the heat exchange line 88A on the basis of the temperature of the inlet of the disintegrator.