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A delayed coker unit process consists of heating the residual oil feed to its thermal cracking temperature in a multi parallel pass furnace. This cracks the long chain heavy carbon and hydrogen molecules of the residual oil into coker gas oil and pet coke. Cracking begins in the furnace, continues in the transfer line, and finishes in the coke drum.
All solids and un cracked residual liquid produced from the vapor and liquid feed are intended to remain in the drum. After the drum is full of the solidified coke, the hot mixture from the furnace is switched to a second drum. While the second drum is filling, the full drum is steamed to further reduce hydrocarbon content of the pet coke, and then water quenched to cool it. The top and bottom heads of the full coke drum are opened, and the solid pet coke is then drilled and cut from the coke drum with a high pressure water nozzle, where it falls into a pit, pad, or sluiceway for reclamation to storage.
A delayed coker unit process consists of heating the residual oil feed to its thermal cracking temperature in a multi parallel pass furnace. This cracks the long chain heavy carbon and hydrogen molecules of the residual oil into coker gas oil and pet coke. Cracking begins in the furnace, continues in the transfer line, and finishes in the coke drum.
All solids and un cracked residual liquid produced from the vapor and liquid feed are intended to remain in the drum. After the drum is full of the solidified coke, the hot mixture from the furnace is switched to a second drum. While the second drum is filling, the full drum is steamed to further reduce hydrocarbon content of the pet coke, and then water quenched to cool it. The top and bottom heads of the full coke drum are opened, and the solid pet coke is then drilled and cut from the coke drum with a high pressure water nozzle, where it falls into a pit, pad, or sluiceway for reclamation to storage.
