Execution Time from: 09/2016
to: 11/2017
Execution Stage
Packaged unit
Client CB&I / ORPIC

Design and procurement of a Coke Removal Unit (CRU) for the quench oil loop at the ethylene plant. The CRU removes solid coke particles without any necessity for shutdown of the ethylene plant (EP), with no negative impact to the environment and to health and safety.

The principle of the process is the continuous removal of solid particles in hydrocyclones with subsequent filtration and washing procedure to obtain a dry solid phase. This patented process of coke filtration from a quench oil system at the ethylene unit has been developed and is owned by Intecha.

The inlet stream is divided into two streams by hydrocyclones, the main stream of clean quench oil without coke, which goes to steam evaporators, and a considerably smaller stream with concentrated solid coke particles, which goes to subsequent separation of coke from quench oil. The separation is carried out inside special coke filters periodically. Filtered coke is dried and after washing procedure is discharged or sucked out of the filter and sent as a dry solid material to incineration.

Installation of the coke removal unit increases EP efficiency and significantly saves operational costs, increases operational life of the equipment and it also reduces contamination of the environment. Incorporation of this process enables ethylene units to prolong operational cycles between shutdowns.