Waste Heat Utilization System and Waste Heat Recovery System

Recuperator (Heat Exchanger)
We design and supply recuperators.
A recuperator is a metal type heat exchanger that is used to recover heat from exhaust gases.
Depending on system conditions, it can recover tempered air of 800℃ at the maximum. Compared with the regenerative heat recovery system, a recuperator is inferior in terms of heat recovery rate. However, it has many advantages as shown below:

External view of a recuperator system

External view of a recuperator system

Cage type metallic heat exchanger

Cage type metallic heat exchanger

Heat recovery efficiency of our recuperators is not reduced over a long period of time, thanks to its structure that uses thermal radiation.
We have also succeeded at prolonging recuperator life by selecting special heat-resistant steel and special coating.

Cullet Preheater
We design and supply cullet preheaters.

Cullet preheating flow diagram

Cullet preheating flow diagram

Glass melting furnace equipped with a cullet preheater

Glass melting furnace equipped with a cullet preheater

This system recovers heat by passing high-temperature exhaust gases through cullets (material) to preheat them.
In a demonstration test furnace, we have succeeded at reducing fuel consumption by 28% with this system, in comparison with the system without cullet preheating.