Carbonizing Process Plant for Dehydrated Pulp Sludge

Continuouse High-Speed Carbonizing System

Abstract

This document is prepared to describe process theory and features for “Carbonizing Process Plant” which comprises of sludge dryer, external?heating furnace with multi-stage screw conveyors and effluent gas treatment system.
It is emphasized that dehydrated pulp sludge should not be disposed at landfill area but reused as one of resources. As one of methodologies for resource recycle, carbonization process, which turns any sludge into carbons under low oxygen circumstance, has been applied. Dehydrated pulp sludge can be dried by the sludge dryer and then fed to the first stage of screw conveyors in the carbonization furnace. While transferring sludge through insides of the screw conveyors with firing from outside of the conveyors, “carbonization process” is proceeded under low oxygen circumstance. It is envisaged that carbons derived from any sludge would be reused.
Tomoe Engineering Co. Ltd. has provided “Carbonization Test Plant” to study process performance including running cost, operability, controllability and maintenance.