天大化工原理-英文版课件-Chapter 1-11Definitions and Principles.ppt

Unit Operations of Chemical Engineering SECTION I Introduction CHAPTER 1 Definitions and Principles Content Introduction 1.1 Unit operations 1.2 Unit systems 1.3 Dimensional analysis 1.4 Basic concepts Chemical engineering has to do with industrial processes in which raw materials are changed or separated into useful products. Chemical engineering is both an art and a science. Science does not give a complete answer, it is necessary to use experience and judgment. Chemical engineering process is complex and various For example: Fluid catalytic cracking(FCC) of petroleum Synthetic ammonia Manufacture common salt The individual operations have common techniques and are based on the same scientific principles. Fluid catalytic cracking(FCC) of petroleum 1.1 UNIT OPERATIONS 1. Unit operations 2. Classification of unit operations 3. Course description 4. Course objectives 1. Unit operations The unit operations are largely used to conduct the primarily physical steps of preparing the reactants, separating and purifying the products, recycling unconverted reactants, and controlling the energy transfer into or out of the chemical reactor. 国家首批精品课程（2003） 2.Classification of unit operations a. Fluid flow流体流动 Chapter 2~5 b. Transportation of fluid流体输送 Chapter 8 c. Mechanical separation机械分离, 非均相物系的分离 Chapter 729 d. Heat transfer传热 Chapter 10~15 e. Evaporation蒸发 Chapter 16 f. Absorption 吸收 Chapter 17,18 g. Distillation 精馏 Chapter 20,21 h. Liquid-liquid extraction 液液萃取 Chapter 23 i. Drying of solid 干燥, Humidification增湿 Chapter 24 Agitation and mixing of liquids搅拌 Liquid-solid leaching浸取 Crystallization结晶 Membrane separation膜分离 Adsorption吸附 Ion exchange离子交换 Section II Momentum transfer Section III Heat transfer Section IV Mass transfer 3. Course description a. Core courses of chemical engineering b. Physical process c. Process + Equipment d. Basic relationships: Material balance Energy(enthalpy) balance Phase equilibria (momentu