tailieunhanh - Process Dynamics, Operations, and Control

Process control is an application area of chemical engineering - an identifiable specialty for the ChE. It combines chemical process knowledge (how physics, chemistry, and biology work in operating equipment) and an understanding of dynamic systems, a topic important to many fields of engineering. Thus study of process control allows chemical engineers to span their own field, as well as form a useful acquaintance with allied fields. Practitioners of process control find their skills useful in design, operation, and troubleshooting - major categories of chemical engineering practice | Spring 2006 Process Dynamics Operations and Control Lesson 1 Processes and Systems context and direction Process control is an application area of chemical engineering - an identifiable specialty for the ChE. It combines chemical process knowledge how physics chemistry and biology work in operating equipment and an understanding of dynamic systems a topic important to many fields of engineering. Thus study of process control allows chemical engineers to span their own field as well as form a useful acquaintance with allied fields. Practitioners of process control find their skills useful in design operation and troubleshooting - major categories of chemical engineering practice. Process control like any coherent topic is an integrated body of knowledge - it hangs together on a multidimensional framework and practitioners draw from many parts of the framework in doing their work. Yet in learning we must receive information in sequence - following a path through multidimensional space. It is like entering a large building with unlighted rooms holding a dim flashlight and clutching a vague map that omits some of the stairways and passages. How best to learn one s way around In these lessons we will attempt to move through a significant portion of the structure - say half a textbook - in about two weeks. Then we will repeat the journey several times each time inspecting the rooms more thoroughly. By this means we hope to gain from the start a sense of doing an entire process control job as well as approach each new topic in the context of a familiar path. the job we will do over and over We encounter a process learn how it behaves specify how we wish to control it choose appropriate equipment and then explore the behavior under control to see if we have improved things. introducing a simple process A large tank must be filled with liquid from a supply line. One operator stands at ground level to operate the feed valve. Another stands on the tank .