化学英语翻译 很急 20分全部奉上Because of the variety and complexity of modern processes ,it is not practicable to cover the entire subject matter of chemical engineering under a single head .The field is divided into convenient ,but arbi

化学英语翻译 很急 20分全部奉上Because of the variety and complexity of modern processes ,it is not practicable to cover the entire subject matter of chemical engineering under a single head .The field is divided into convenient ,but arbi
化学英语翻译 很急 20分全部奉上
Because of the variety and complexity of modern processes ,it is not practicable to cover the entire subject matter of chemical engineering under a single head .The field is divided into convenient ,but arbitrary ,sectors.This text covers that portion of chemical engineering known as the unit operations. an economical method of organizing much of the subject matter of chemical engineering is based on two facts: (1) Although the number of individual processes is great, each one can be broken down into a series of steps, called operations ,each of which in turn appears in process after process；（2）the individual operations have common techniques and are based on the same scientific principles. For example, in ,most processes solids and fluids must be moved; and tasks such as drying, size reduction, distillation, and evaporation must be performed. The unit operation concept is this: by studying systematically these operations themselves-operations that clearly cross industry and process lines-the treatment of all processes is unified and simplified.

化学英语翻译 很急 20分全部奉上Because of the variety and complexity of modern processes ,it is not practicable to cover the entire subject matter of chemical engineering under a single head .The field is divided into convenient ,but arbi
由于现代工艺上的多样性和复杂性,一个人就能涵盖所有的化工领域已经是不可能的了.这个领域已被分割为很便捷但也很主观的部分.本文报道了化工过程中的单元操作.这个能够处理许多化工内容的经济的方法基于以下两点：（1）尽管化工过程已被分成了大量的步骤,但每个步骤都可以再分得更细,我们叫它操作.每个操作都是有一个又一个步骤中反复出现的.（2）这些分立的操作都有一些共同的技术,并且都是基于相同的科学原理.比如说,大多数过程中都要转移固体和液体；一些像干燥、研磨、蒸馏、挥发这样的操作也经常进行.单元操作的概念就是：通过系统地学习在工业上和生产线中常用的基本操作使所有的过程都规范化和简单化