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Examples of Commercial Application


Revamping of Distillation and Rectification Sections


Customer: АО BIOFUTURE, Silute, Luthuania.

Project:
Project No1. Development of process capacity of deep distillery dreg processing. Project objective was to enlarge end products range processing distillery dreg in order to obtain a fundamentally new for Lithuania product which is protein and vitamin concentrate (PVC). PVC is used as dry feed enricher increasing its feed value. Parallely, ecological problem is solved by achieving 100% distillery dreg disposal.

Poject No2. Revamping of distillation and rectification sections. Project objective was to enlarge end products range producing rectified bioethanol the quality characteristics of which conform to alcoholic beverage production requirements. 



Вакуумная колонна масляного типа
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Revamping of vacuum oil column (OD 8200 mm) with application of structured packing

Customer: Major oil refinery plant

Column name: Vacuum oil column

Column diameter: 8200 mm

Production problems:
Often standard trays were often applied in the column; this resulted in poor efficiency, high pressure drop, and low yield of oil fraction and wide range of fraction. Moreover, due to improper column operation the colour of heavy oil fraction remained deep; the content of residual deposition is high.

Results of revamping:
Pressure  drop between the top and stripping section reduced by 20 mm Hg at designed capacity and the composition of all the side-cut distillates became narrower. The colour and carbon residue content of heavy fraction seems to be improved. The light fraction 500°C  in the vacuum residue reduced from 7% to 4%.

Вакуумная колонна масляного типа
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Crude distillation unit is successfully revamped with structured packings and high efficiency ADV (EDV) trays.

Customer: Oil refinery plant

Column name: Crude distillation unit

Column diameter: 4800 mm

Production problems:
The column trays that were in use could not meet customer's requirements to the operation flexibility. High pressure drop resulted in high steam flow and  low yield of the light fractions.

Results of revamping:
Crude distillation unit in which packing was used after the revamping has high operation flexibility and better rectification effect.  Maximum operating range increased by 15%. The yield of light fractions increased by at least 0,5% on the basis of crude petroleum. Mixing of side-cut distillates significantly decreased. The initial boiling point of the third side-cut distillate after revamping increased by 33 °С.

Атмосферная колонна
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Revamping of the fractional column (OD 3000mm) with EDV™ valve trays increases column capacity by 50%

Customer: Oil refinery plant

Column name: Fractional column

Column diameter: 3000mm

Production problems:
Rise in propylene price in the market required increase of propylene production from liquefied gas (LPG). Operation improvement of depropylene column (De-C3) and propylene fractionating C3 column was a key problem to increase the production of the plant.

Results of revamping:
The capacity of the unit (LPG) after revamping reached 300 000 tons per year, it is 10% more than designed capacity, design value fixed in the contract. The customer cannot increase unit capacity because of the limited capacity of heat exchangers. Efficiency of the fractionating column increased notably, purity of propane and propylene increased at circulation reflux decrease. Propylene yield increased from 90% to 95%.

Фракционная колонна
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