精馏

By using ethanol precipitative pretreatment and rectification patent technology,the product 1,3-propanediol with purity of 99% had been harvested,the seperation yield of 1,3-propa...

采用发酵液醇沉预处理、再精馏的专利技术可分离得到纯度大于99%的1，3-丙二醇产品，分离收率大于85%，产品质量达到了聚对苯二甲酸丙二酯聚合反应的要求。

The new process can improve industrial separation of propylene and propane.

新工艺对于丙烷和丙烯的精馏分离有一定的工业意义。

With the increase in capacity, the quondam technology which adopted decomposition in middle pressure and pre-distillation limited the production.

随着生产能力的提高，生产强度的增加，我公司尿素装置原中压分解预精馏工艺的缺陷开始制约生产操作。

In many cases, a rectifying column with reflux is used to improve the performance of the batch still.

在许多情况下，用带有回流的精馏塔以改善间歇釜的分离性能。

The experimental setup includes the reactor of gas-phase esterification, gasifying device of methanol, refining device of raw product and the segregator of oil and water.

试验装置主要由气相酯化反应器、甲醇气化器、粗生物柴油精馏器和油水分离器等组成。

Finally, simulate dynamic mathematic model by MATLAB software, and get a series of dynamic curve of Vacuum's sidetrack from feed-in to static state.

最后使用MATLAB对建立的动态数学模型进行仿真，得到一系列侧线油组分浓度变化的过渡过程曲线，从而了解了减压精馏塔的动态特性。

Deethanizer right choice is the sieve column, so we Tower Drive, plate spacing, sieve number of openings rate Hydrodynamics sieve has done a serious basis, and make a distillation of the stripper and the load performance of the plan, determine the operating point and the operating line.

对脱乙烷塔选择的是筛板塔，因此我们对塔径、塔板间距、筛孔数、开孔率、筛板的流体力学都做了认真的计算，并且做出了精馏段和提馏段的负荷性能图，确定了操作点和操作线。

In each stirrer gas was fully contacted with liquid and reached nearly phase equilibrium.

本文将乙烯精馏塔视为N个串级的搅拌槽，在每一级上汽液充分接触并达到平衡。

In this paper, the development of pinch zone for ternary systems in constant reflux operation is discussed.

在无穷板数和任一瞬时釜浓下选择不同的回流比可使分批精馏处于不同夹紧区下操作。

The control problem of an internal thermally coupled distillation column is studied.

主要讨论和研究了高纯度热辐合精馏塔的优化控制问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。