September 2002

Special Report: Instrumentation and Control

Consider a neuro-fuzzy system to model a delayed coking process

Soft-sensing techniques can be used to achieve realistic control models

Jia, L., Yu, J., Research Institute of Automation, East China University of Science and Technology

In the refining industry, engineers and technicians are focusing more attention on production and handling of residual products. Thus, residual delayed coking is becoming a popular method to upgrade residual feeds into higher value products. In the delayed coker, the residual feed is thermally cracked into lighter products and coke.1 The higher-value light products include gasoline, diesel oil and coker gasoil. The delayed coker consists of coking furnace, coking drum and fractionator as shown in Fig.1. Hot fresh liquid feed enters the bottom section of the fractionator and is mixed with recycle oil after exchanging heat with

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