vacuum column

The factor is less pressure drop of the whole column and higher vacuum at column top.

做到这一点的关键在于降低汽化段到塔顶的流动压降和提高塔顶的真空度.

The whole work is described as follow: First, Pro/ II with Provision was harnessed as the process simulation engine. Sequential modular was applied on flash column, prefractionator, atmospheric column and vacuum column for steady state simulation.

主要研究工作如下：第一，以PRO/Ⅱ作为流程模拟工作的工具，应用序贯模块法对三套常减压装置的闪蒸塔、初馏塔、常压塔与减压塔分别进行了稳态模拟。

A large-scale heavy oil integrated refining technology of vacuum distillation column is presented in this paper.

介绍了自行开发的稠油炼制减压分离过程大型化关键集成技术.

The operation result showed that the lube base oil products with high viscosity index and low pour point were produced from the 2nd and 4th vacuum column side cuts and the deasphalted oil of Daqing crude oil.

结果表明，以大庆原油的减二线、减四线和轻脱沥青油为原料，得到了粘度指数高、倾点低的润滑油基础油产品。

In search of the basis that direct-contact heat transfer is applied to fuel-type vacuum column, spraying experiment and heat transfer experiment of spray nozzle distributor were studied in the paper.

为了寻求直接接触式传热技术应用于减压塔的实验依据，本文对喷射式分布器进行了工业规模的喷淋和传热实验研究。