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Ludwig’s Applied Process Design for Chemical and Petrochemical Plants

January 5, 2008

By Grossel, Stanley S

Ludwig’s Applied Process Design for Chemical and Petrochemical Plants Vol. 1, 4th Edition A. Kayode Coker, Gulf Professional Publishing/Elsevier, Burlington, MA, 1,024 pp., $199,2007, ISBN 13: 978-0-7506-7766-0; ISBN 10: 0-7506-7766-X Completely revised and expanded, this fourth edition features new materials, including:

* a chapter covering the physical properties of liquids and gases, with tables of properties in an appendix

* a chapter on cost estimation and economical evaluation procedures

* discussions of hazard identification and analysis, and additional topics in design for safety (e.g., inherent safety)

* an appendix on ethics in the engineering profession.

The books also comes with numerous computer applications and Excel spreadsheets. Explanations on how to use these tools are given in the book’s preface. In total, there are nearly 50 process datasheets for equipment in either Excelspreadsheet format or hard copies that can be readily accessed.

The author covers the topics in the book in detail and provides numerous references for material cited in the text, as well as references for further reading. He has done an admirable job of carrying on the excellent work started by Ernest E. Ludwig.

Chapter 0 is a compilation of rules of thumb for design of process equipment covered in this volume and past ones. Process planning, scheduling, and flowsheet design are covered in detail in Chapter 1, while Chapter 2 reviews cost estimation and economic evaluation. In Chapter 3, the author reviews physical property data for liquids and gases and presents Excel spreadsheet programs for estimating these properties for a range of temperature and correlation coefficients, which can be downloaded from the companion website.

Chapter 4 on fluid flow is quite extensive and discusses design procedures for single-phase flow for liquids and gases, two-phase liquid-gas flow, non-Newtonian flow and slurry flow. The sections on non-Newtonian flow and slurry flow are limited and could benefit with the addition of greater detail. Also, several references on pipe sizing methods for non-Newtonian flow did not correspond to the citations in the list of references at the end of the chapter. Similarly, the references in the section on slurry flow did not match the list of references at the end of the chapter.

Pumping of liquids is covered in Chapter 5. Most of the discussion deals with centrifugal pumps, with shorter sections on rotary and reciprocating pumps. This chapter could be improved with discussions on sealless (canned and magneticdrive) pumps, as well as metering and diaphragm pumps, which are now widely used in the chemical and petrochemical industries. Two other topics that are not covered, and would have been very useful, are: mechanical seals and packings; and pump suction and discharge piping design, which has an effect on pump performance.

Chapter 6 on mechanical separations is a good review of process equipment for the separation of liquid particles from vapor/gas, liquid particles from immiscible liquid (decanters), dust or solid particles from vapor/gas, and solid particles from liquids. Numerous example calculations are provided.

Mixing of liquids is covered extensively in Chapter 7, focusing primarily on liquid-liquid mixing. While it has a solid foundation in topics such as the theory of mixing and types of mechanical mixers, it lacks discussion on mixing and heat transfer in glass- lined reactors, which are commonly used in the manufacture of pharmaceuticals, fine chemicals and polymers. This chapter can also be improved with more in-depth discussion on gas-liquid mixing and non-Newtonian liquids mixing.

Chapter 8 is a good review of ejectors and mechanical vacuum systems. The major part of this chapter is taken up with steam ejector systems and covers many aspects of their design and operation. The rest of the chapter discusses various types of mechanical vacuum pumps and liquid-ring vacuum pumps. However, there is no discussion of dry mechanical vacuum pumps, which are typically used in the manufacture of pharmaceuticals and microchips.

Chapter 9 is an extensive discussion of process safety and pressure-relieving devices. Many topics are discussed in detail with example calculations included. Several topics should have been updated and more fully discussed, and others included, in my opinion. For example, the following is recommended for the next edition:

* expanding the section on flame arresters (see book “Deflagration and Detonation Flame Arresters”)

* using the latest edition (2007) of NFPA 68 for the presently recommended method (method given for the design of vents for relief of deflagrations in enclosures is outdated and should not be used)

* expanding the section on static electricity, and citing references to NFPA 77 and the book “Avoiding Static Ignition Hazards in Chemical Operations”

* adding a new section on inerting (purging and padding) of storage tanks and process equipment

* adding a new section on electrical area classification.

Despite some shortcomings, this is an excellent book that will provide much useful information to chemical engineers in industry involved in process design. It also can be used as a classroom text for senior and graduate level chemical plant design courses.

Stanley S. Grossel, President

Process Safety & Design, Clifton, NJ

Copyright American Institute of Chemical Engineers Dec 2007

(c) 2007 Chemical Engineering Progress. Provided by ProQuest Information and Learning. All rights Reserved.




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