Glass Lined Reactors are used instead of glass reactors especially when the scale of operation is large and relatively high-pressure steam is to be used as heating media.
Quite often assemblies like Simple Distillation Unit, Reaction Distillation Unit, Fractional Distillation Unit etc. are installed above glass-lined reactors.
The basic features of these assemblies remain the same but glass shell and tube heat exchanger are preferred due to the large scale of operation.
A typical fractional distillation unit type assembly over GLR is shown in the adjacent figure.