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:
- Combined use with a secondary heat recovery system such as a waste heat boiler is available.
- Initial investment can be reduced.
- Recuperators do not leak preheated air, and therefore, the air-to-fuel ratio can be controlled accurately.
- The installation area is small, and installation is therefore relatively free of normal layout limitations.
External view of a recuperator system
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
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.