DCU Process Breakout

Delayed Coking Ancillary Equipment
(Blowdown System, Coke Cutting, Coke Handling, and Water Handling)

Facilitator: Sim Romero, Becht Engineering

Overview

• How long do you steam out to the fractionator and with how much steam?
• How long do steam out to the blowdown system and with how much?
• Does anyone see any VCM impact by longer or shorter steam outs?
• How do you start injecting water into the coke drum?  Do you overlap steam and water or just take steam out and add water?
• Do you ramp the water into the drum and is that ramping profile automated?
• Do you control the back pressure during water injection and why?
• What is the water pressure at the cutting bit during coke cutting?
• During the pilot hole do you widen the cone section and if so how/when?
• Before the pilot how do you insure the water is drained or is that needed with a bottom slide valve?
• Do cut from the bottom and go up or cut from the top and go down or some combination?
• How do you handle hot spots and where do you see most of these hot spots?
• Do you cut into a pit, pit/pad, just a pad, or some mechanical system?
• How is the coke stored and is dust a problem?  If so how is the dust controlled?
• Are samples taken of the coke? How often and how is it sampled (i.e. sampler system)?
• How is the solids removed from the cutting water – maze, cyclones, filter press, settling pond etc.…?
• How clean is the water in the cutting water tank i.e. ppm solids?
• Is H2S an issue with the cutting water?
• Is any blowdown water recycled into the cutting water tank?

What do you want to talk about? Bring your process and troubleshooting issues to this session. Discuss and collaborate with your DCU colleagues from around the globe.

How a breakout works.