CONSER EXPERIENCE IN UPGRADING EXISTING ETHYLENE PLANTS
PROCESS FEATURES
CONSER has devoted considerable efforts in the upgrading and modernization of existing steam cracker units.
The experience and know how accumulated on design and on operational parameters under varying conditions provides CONSER with a relevant position in the art of olefin technology upgrading.
REFERENCES
Location ENICHEM Porto-Torres S.I.R. Cagliari ENICHEM Gela ENICHEM Priolo
The experience of
CONSER in ethylene plant design and revamping extends over more than 30
years.
Design features which have been incorporated in existing plants include
the following:
- Optimum recovery
of the heat available from the pyrolysis furnace effluent stream
- Addition of low
level waste heat recovery facilities
- Improved integration
of the heat requirements in the process with the heat available in the
quench system
- Reduction of pressure
drop at the interstages of the compression system
- Increase of the
number of the distillate and condensate strippers to reduce the
recycle to the compressor system
- Improved demethanized
feed system by multifeed chilling and prefractionation to
decrease refrigeration duties
- Incorporation
of turboexpander - recompressor in the demethanizer overhead to
reduce the cryogenic refrigeration load
- Reduce the consumption
of energy in the deethanizer by increasing the number of
trays and using inter-reboiler
- Increase the efficiency
of the ethylene fractionation tower employing external refrigeration
circuits for reboiling and condensing
- Improved selective
hydrogenation systems
- Improved integration
of the process units with the utilities systems
- Improved valorization of the co-products as polymer grade propylene, C4 fractions, pyrolysis gasoline, aromatics, etc..