Sludge Melting System / Ash Melting System

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This is a sludge/ash melting process designed to treat and stabilize sludge from sewage treatment plants in the easiest and most economical manner.
Using a revolutionary unit-a JGC spiral flow sludge melting furnace-this process melts sludge at high temperatures (by making maximum use of the sludge’s high calorific value) and then cools it for solidification, thereby reducing the volume to as little as 1/25 of that of the raw material.
As it adopts a melting furnace of a non-cooled refractory wall type, this process is also suitable for sludge/ash melting at a low incineration cost.

Cross-sectional view of the melting furnace

Features

Highly efficient sludge cake drying with a multi-stage dryer
High-temperature melting by making use of the incineration of the sludge itself
Highly stable operation
Energy saving through maximum heat recovery
High volume reduction (1/25) in the form of molten slag
Varied applications of solidified slag (concrete aggregates, material for backfill, etc.)

Applications

Sludge melting:	Melting of sewage sludge
Ash melting:	Melting of ash and fly ash from the incineration of sewage sludge and industrial sludge

Experience

Sewage sludge melting system (150 tons/day) for Osaka municipality (Hirano)
Incineration/melting system (incineration: 90 tons/day, ash melting: 2.4 tons/day) for Company “A” (Kagoshima Prefecture)


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