Coke cutting equipment complex for the delayed coking unit of RN-KOMSOMOLSKY NPZ LLC

The hydraulic decoking process is a complex process that requires high-quality equipment and intelligent control systems.

Coke is removed from the coke chambers by hydraulic decoking, which is carried out in two stages.

First, a hole (barrel) is made in the coke layer. In the second stage, the coke is cut into layers as the operator lowers the tool. Hydraulic cutting tools are mounted on the end of a hollow striker rod, which is suspended on a swivel joint. The striker rod is rotated by an electric motor. A winch on the platform raises and lowers the striker rod within the structure of the tower built above the coke chambers. Water for cutting is supplied by a high-pressure coke cutting pump.

To avoid frequent pump starts and stops, a special hydraulic bypass control valve is used. After coke removal, the cover is reinstalled on the non-working chamber, steam purged to remove air, and steam pressure tested.

After this, vapors from the working coke chamber, which is currently being filled, are fed into the collector. The vapor-liquid mixture formed as a result of steam condensation in the non-working collector enters the blowdown column. After the coke chamber has warmed up sufficiently, it is ready for operation for filling.

Complete set of equipment supplied for the decoking system

• Drill rod and sleeves;
• Guide rails;
• Coke cutting cutters;
• High pressure control valve (more than 70 MPa).

Scope of work performed

• Development of working design documentation;
• Reengineering, manufacturing and assembly of the main equipment for the coke removal system;
• SHMR, commissioning and commissioning.