September 2016

Special Focus: Refining Technology Developments

Case study: Plan and execute a coke drum replacement project

The delayed coking unit is a critical part of a refinery’s crude oil process flow and profitability.

Johnson, B., Phillips 66; Farris, M., Wood Group Mustang

The delayed coking unit is a critical part of a refinery’s crude oil process flow and profitability. Due to its stringent operating parameters, the coker must withstand some of the harshest conditions in the facility. Taking heavy crude residuals from the refinery’s vacuum distillation fractionator, the unit operates at temperatures that can exceed 800°F. The batch thermal cracking process involves the filling, quenching, high-pressure water jet cutting and removal of solid coke in a vertical insulated cylinder drum during an operating cycle. The coke drums cycle between being online and offline due to the batch process, causing extreme temperature fluctuations, severe vibration and high-pr

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