| 摘要 |
A system and method to improve the efficiency of delayed coker charge heating by effecting and controlling the temperature of a coker process fluid, prior to its introduction to a coker charge heater. In its preferred embodiment, the instant invention strategically positions and controls a pre-heater to automatically stabilize and minimize delayed coker charge heater firing rates. Said pre-heater's set point is derived by a feed forward control system that allows for the detection of process fluid temperature within a combination tower bottom, and communicates that temperature value to a pre-heater. Based upon the temperature value communicated to the pre-heater, the pre-heater intensifies, maintains, or decreases its firing to effect an operationally consistent combination tower bottoms temperature. By maintaining nearly constant combination tower bottoms temperature, a delayed coker charge heater derives enhanced operational efficiency and increases its life expectancy. Such benefits result from a nearly constant coker charge heater process fluid inlet temperature and optimized coker firing rates.
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