| 摘要 |
1496733 Controlling the distillation of crude petroleum SOC NATIONALE ELF AQUITAINE 19 May 1975 [30 May 1974] 21119/75 Heading C5E A method of controlling a distillation column having expansion and distillation for topping crude petroleum comprises introducing the crude petroleum into the expansion zone of the column to obtain a vaporized fraction having a known yield, withdrawing a representative sample of the vaporized fraction from said expansion zone of said column, subjecting said sample to chromatographic analysis to obtain an output signal for determining the TBP distillation curve in which the hold-up time is in linear relation with the distillation temperature of each product in the analysed fraction, integrating the output signals supplied by the analysis to provide as a function of the temperature the value of the quantity of product analysed, and using the information provided by said analysis for operating a control unit for generating signals for adjusting the rates of withdrawal of product at different predetermined levels of the distillation zone.
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