摘要 |
A process and control system for cracking a heavy hydrocarbon feedstock containing non-volatile hydrocarbons comprising heating the heavy hydrocarbon feedstock, mixing the heated heavy hydrocarbon feedstock with a dilution steam stream to form a mixture stream having a vapor phase and a liquid phase, separating the vapor phase from the liquid phase in a separation vessel, and cracking the vapor phase in the furnace, wherein the furnace draft is continuously measured and periodically adjusted to control the temperature of the stream entering the vapor/liquid separator and thus controlling the ratio of vapor to liquid separated in the separation vessel; and wherein in a preferred embodiment the means for ;adjusting the draft comprises varying the speed of at least one furnace fan, possibly in combination with adjusting the position of the furnace fan damper(s) or the furnace burner damper(s). |
申请人 |
EXXONMOBIL CHEMICAL PATENTS, INC.;STELL, RICHARD, C.;ANNAMALAI, SUBRAMANIAN;FRYE, JAMES, M. |
发明人 |
STELL, RICHARD, C.;ANNAMALAI, SUBRAMANIAN;FRYE, JAMES, M. |