## Abstract

Based on proper assumptions, an approximate but sufficiently accurate formula for evaluating HETP (the height equivalent to a theoretical plate) involving liquid axial backmixing effect is presented. A new dimensionless number, designated as backmixing characteristic number, is introduced. The effective effect of liquid backmixing on separation efficiency of a distillation column is pronounced with increasing the axial liquid backmixing coefficient and with decreasing the overall HTU (height of a transfer unit) for vapor phase and the liquid effective velocity. The incremental factor of HETP is determined only by backmixing characteristic number and vapor-liquid equilibrium constant. The computing formula and graph for the incremental factor of HETP are given.

Original language | English (US) |
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Pages (from-to) | 7-10 |

Number of pages | 4 |

Journal | Huaxue Gongcheng/Chemical Engineering |

Volume | 27 |

Issue number | 3 |

State | Published - Jun 1999 |

Externally published | Yes |

## ASJC Scopus subject areas

- Chemical Engineering(all)