692
A. Filzwieser et al.
Heat Recovery
The fact that ILTEC Technology with the ionic liquid IL-B2001 allows a temperature
difference of 150 °C between inlet and outlet combined with the higher level of outlet
temperature makes the process suitable to be combined with a heat recovery system
for direct usage or power generation under feasible conditions. In conjunction with the
higher absolute temperature, the extensive temperature range permits a heat recovery
in an efficient way rather than being lost (creating steam instead of warm water).
In case of continuously provided heat, the possibility of heat recovery through an
Organic Rankine Circle (ORC) exists, which is a technology not suitable for water
as cooling medium. Under these circumstances, primary energy resources and hence
CO 2 can be saved.
Industrial Scale Application
Several industrial scale applications have been realized or are in the stage of finalization (date of January 2019). The ILTEC Technology means improved safety in
certain areas, and subsequently, this will have a positive influence on insurance
policies (Table 1).
Summary and Outlook
The opportunities to increase furnace safety and operational efficiency by an industrially proven alternative cooling method are widely spread. It substantially improves
the operation economically by increasing the life time of refractory lining, corrosion
prevention, while offering the potential of high-quality heat recovery. The described
examples demonstrate that it is possible to employ the new cooling technology as an
alternative for replacing water in existing cooling circuits for different reasons. The
replacement of the water in a tap hole is more or less driven exclusively by safety considerations. The approach of replacing the water in the side wall cooling combined
with a new design of the cooler of an electric arc furnace (for example) is driven by
the increase in lifetime of the refractory and an increase in furnace availability. This
technology is, however, not only limited to these specific applications but could be
used in multiple other applications where cooling with water is not possible mainly
due to safety reasons.
A. Filzwieser et al.
Heat Recovery
The fact that ILTEC Technology with the ionic liquid IL-B2001 allows a temperature
difference of 150 °C between inlet and outlet combined with the higher level of outlet
temperature makes the process suitable to be combined with a heat recovery system
for direct usage or power generation under feasible conditions. In conjunction with the
higher absolute temperature, the extensive temperature range permits a heat recovery
in an efficient way rather than being lost (creating steam instead of warm water).
In case of continuously provided heat, the possibility of heat recovery through an
Organic Rankine Circle (ORC) exists, which is a technology not suitable for water
as cooling medium. Under these circumstances, primary energy resources and hence
CO 2 can be saved.
Industrial Scale Application
Several industrial scale applications have been realized or are in the stage of finalization (date of January 2019). The ILTEC Technology means improved safety in
certain areas, and subsequently, this will have a positive influence on insurance
policies (Table 1).
Summary and Outlook
The opportunities to increase furnace safety and operational efficiency by an industrially proven alternative cooling method are widely spread. It substantially improves
the operation economically by increasing the life time of refractory lining, corrosion
prevention, while offering the potential of high-quality heat recovery. The described
examples demonstrate that it is possible to employ the new cooling technology as an
alternative for replacing water in existing cooling circuits for different reasons. The
replacement of the water in a tap hole is more or less driven exclusively by safety considerations. The approach of replacing the water in the side wall cooling combined
with a new design of the cooler of an electric arc furnace (for example) is driven by
the increase in lifetime of the refractory and an increase in furnace availability. This
technology is, however, not only limited to these specific applications but could be
used in multiple other applications where cooling with water is not possible mainly
due to safety reasons.