Abstract: The hydro working conditions of steam-water system in waste heat recovery from ascension pipe is analyzed based on a project example.A block method of 5 ascension pipes as one group of vaporization system is adopted to ensure a balance between water feeding and steam generation.The thermal system of the ascension pipe is arranged in piping of “water feeding from stage 1+steam generating from stage 2” to keep hydro stability of the steam-water system.The system piping is designed as “big diameter and low flow rate” to minimize resistance loss due to long arrangement of external lines.In this project,the steam yield is about 131 kg/t·coke, which can improve the resources utilization of the coking plant.

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