Control system for delayed coker

Mineral oils: apparatus – Vaporizing – Automatic control

Patent

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Details

202253, 202270, 208131, 208DIG1, B01D 342

Patent

active

050247301

ABSTRACT:
A system controls a delayed coker in which a heavy liquid hydrocarbon feedstock is thermally decomposed to a solid coke product in a cyclical process. When the coking portion of the cycle is completed, the coke in the drum is cooled by quench water, and the quench water is then passed from the coke drum through a manifold to a drain conduit. Hot vapor is passed through the coke drum, via the same manifold to warm the coke drum. A temperature controller, valve actuator and ball valve allow passage of vapor to the coker fractionator at a manifold temperature at which all water is in the vapor state. Manifold temperatures at which liquid water may exist causes the ball valve to close, preventing liquid water from flowing into the coker fractionator. Upset of the coker fractionator is prevented.

REFERENCES:
patent: 3936358 (1976-02-01), Little
patent: 4168224 (1979-09-01), Jansma
patent: 4634500 (1987-01-01), Elliott et al.
patent: 4929339 (1990-05-01), Elliott et al.

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