馏分

But the biogenic sulfur isotopic fractionation process was complicated by many factors.

但生物成因的硫同位素分馏过程复杂，受诸多因素的限制。

With the development of determination technique, the fractionation of the stable chlorine isotope was verified, attracting many people＇s attention.

随着测定技术的不断发展，氯同位素的分馏效应逐渐得到证实，并引起了人们的广泛关注。

The operation and control interaction analysis between main fractionator and stabilizer of FCCU was studied.

研究分析了催化裂化装置的主分馏塔与稳定塔之间操作控制的关联性。

A new method establishing models of FCC main fractionator was proposed.

李鹏提出一种新的催化裂化主分馏塔建模方法。

All of the mass and energy in the main fractionator system are supplied to the system by the reactor and regenerator.

主分馏器里所有的反应物和能量都是由反应堆和交流热换器提供的。

In this paper, software PRO/Ⅱis adopted to simulate the whole flowthat is main fractionator system and absorption-stabilization system.

催化裂化是炼油厂中重要的二次加工过程，但其主分馏塔和吸收稳定系统面临生产扩能、产品质量改善和节省能耗几大问题的困扰。

The invention comprises the step of adding a foam reducing amount of a foam reducing composition at the primary fractionator.

本发明包括将减少泡沫量的消泡组合物加到初分馏塔处的步骤。

The operation and control interaction analysis between main fractionator and stabilizer of FCCU is given.

stabilizer control ； system design ；分析了催化裂化装置稳定塔的先进控制问题，讨论了主分馏塔与稳定塔之间操作控制的关联性，基于状态反馈预测控制，根据装置的操作运行情况及关联性分析，使用现有的测点，对稳定塔建立了用于实时控制的简化状态空间数学模型，以在线计算稳定汽油饱和蒸汽压作为被控变量，设计了稳定塔先进控制系统。

The industrial application showed that the key process parameters, such as the regenerator dense phase temperature and the temperature under the first tray of the fractionator bottom, etc.

工业实践表明，应用此控制明显地改善了对再生催化剂温度、分馏塔底第一层板下温度等关键工艺参数的控制，提高了装置的转化率与轻油收率。

A fast simulation system for FCC main fractionator was developed by using the distillation data of oil product,experiential charts and correlations in petroleum refining industry.

基于油品的蒸馏数据，利用炼油工业中已积累的一整套经验图表和经验关联式，开发了一个快捷的催化裂化主分馏塔模拟系统。

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。