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Visbreaking-Thermal Cracking

PROCESS FEATURES
CONSER, in association with qualified suppliers of cracking furnaces, offers technology for the complete design (Basic Process Book) of Visbreaking/Thermal Cracking units.
The CONSER processes are supported by a relevant experience and know how in design of VSB/TC units and by a deep practical knowledge of the effect of the operating parameters.
In addition to the process design for new VSB/TC the units, projects carried-out by CONSER would typically include:

• Revamping and modernization studies
• Improvement of yield by recycle operation
• Troubleshooting (namely: fouling in column and heat exchangers)
• Operation with/without reaction chamber
• Experienced design of quench system
• Straight-run and cracked feedstocks for thermal cracking
• Atmospheric and vacuum residue feedstocks for Visbreaking


REFERENCES

Number of Projects 35
Number of Units 15
Capacity Range
VSB  From 2000 to 6000 MT/d
TC  From 1500 to 5000 MT/d

 

FLOWSHEET

VISBREAKING C158 R

 

PROCESS DESCRIPTION

Feedstock is heated up to the required reaction temperature in a heater. Cracking occurs inside the coils of the heater and can be continued in a downstream reaction chamber. Steam injection to each coil of the heater is used to control velocity, residence time and to avoid coke formation.
Heater effluent quenching is provided by a stream of gasoil recycled from a
fractionation column where naphtha and gasoil are distilled off from fuel oil.

CASE HISTORY

Project type Revamping  New Unit New Unit
Unit VSB  TC TC
Capacity, T/d 3400  2200  2400
Feedstock  V.R. S.R.VGO S.R.VGO
Operation - once-thru Recycle
Distillate Yields, % 23 53 75

 


P.le Ezio Tarantelli, 100
00144 Rome - Italy

e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Tel. (+39) 06 5262001
Fax (+39) 06 5205249

CF e n° reg. imp.: 00875210585
partita iva: 00938941002 
capitale sociale: € 130.800,00 i.v.
rea: 327729 trib. RM 318/70

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