Equipment Summary

Prepare drafts of line schedule and/or summary sheets (Figures 1-24 A-D), and equipment summary schedules (Figures 1-27, 1-28, 1-29, 1-30), plus summary schedules for safety relief valves and rupture disks, compressors and other major equipment. 

Equipment Summary Table. This provides information for each equipment item in the PFD, with the kind of information typically provided for each type of unit shown in Table 3.8. Note that the materials of construction (MOC), and operating temperature and pressure, are required for all units. Also note that suggestions for the materials of construction are provided in Appendix III. 

When finished with its evaluation, Aspen IPE displays a window that contains an executive summary of its results. This window is not shown here. Note that when the user presses the Tools pulldown menu, selects Options, and then View Spreadsheet in Excel, Aspen IPE is activated to prepare several spreadsheets, including the Equipment Summary, Utility Summary (available in Version 12.1), ProjSum, Executive Summary, and Run Summary spreadsheets. For the details of these spreadsheets, see the Aspen IPE User s Guide (press the Help button and follow the path Aspen Icarus Process Evaluator User s Manual —> Evaluating the Project Reviewing Investment Analysis). 

M. G. MENDEL and D. C. BONFER, Determination of the ReacUon Path During Thermal Denitration of Uranyl Nitrate and Plant Equipment, Summary Technical Report for foe period October 1, 1968 to December 31, 1968, NLCO-1035, n>. 1.1-1.2, National Lead Company of Ohio (January 1969). 

EQUIPMENT SUMMARY - FINDING YOUR WAY AROUND THIS BOOK... 

It is clear that the PFD is a conplex diagram requiring a substantial effort to prepare. It is essential that it should remain uncluttered and be easy to follow, to avoid errors in presentation and interpretation. Often PFDs are drawn on large sheets of paper (for exanple, size D 24" x 36"), and several connected sheets may be required for a conplex process. Because of the page size limitations associated with this text, conplete PFDs cannot be presented here. Consequentiy, certain liberties have been taken in the presentation of the PFDs in this text. Specifically, certain information will be presented in acconpanying tables, and only the essential process information will be included on the PFD. The resulting PFDs will retain clarity of presentation, but the reader must refer to the flow summary and equipment summary tables in order to extract all the required information about the process. 

The final element of the PFD is the equipment summary. This summary provides the information necessary to estimate the costs of equipment and furnish the basis for the detailed design of equipment. Table 1.6 provides the information needed for the equipment summary for most of the equipment encountered in fluid processes. 

The information presented in Table 1.6 is used in preparing the equipment summary portion of the PFD for the benzene process. The equipment summary for the benzene process is presented in Table 1.7. and details of how we estimate and choose various equipment parameters are discussed in Chapter 11. 

The flow table presented in Table 1.5. the equipment summary presented in Table 1.7. and Figure 1.5 taken together constitute all the information contained on a commercially produced PFD. 

I n Chapter 1, the information provided on a process flow diagram, including a stream table and an equipment summary table, was presented. In the next four chapters, this information will be used as a basis for estimating... 

To obtain an estimate of the capital cost of a chemical plant, the costs associated with major plant equipment must be known. For the presentation in this chapter, it is assumed that a PFD for the process is available. This PFD is similar to the one discussed in detail in Chapter 1, which included material and energy balances with each major piece of equipment identified, materials of construction selected, and the size/capacity roughly estimated from conditions on the PFD. Additional PFDs and equipment summary tables are given for several processes in Appendix B. 

Chapter 1 explains the requirements of a major equipment summary table. In the context of initial PFD development, the process of creating the table forces the process design engineer to question the size (and cost) of various units for which there may well be other options. If, early on, one must specify a large compressor, for example, the process can be changed to a lower pressure or it can be modified to use liquid pumping followed by vaporization rather than vaporization followed by conpression. The early consideration of materials of construction provides the clue that normal tenperatures and pressures usually result in less-expensive materials. 

The beginning of the process is the generic block flow process diagram Although the flow summary table at this stage is based on crude assunptions and the equipment summary table is far from the final equipment specifications, they help keep the chemical engineer cognizant of key choices that need to be made. 

Stream summaries, utility summaries, and equipment summaries are presented in Tables B.l.l-B.1.3. Table B.1.1 Flow Table for DME Unit 200... 

Stream tables, utility summaries, and major equipment summaries are given in Tables B.3.1. B.3.2. and B.3.3. respectively. 

The aqueous phase from the extractor. Stream 12, is sent to a wastewater column, T-1006, where a small amount of DIPE is recovered overhead and returned to the extractor. The bottoms product, containing water and trace quantities of solvent and acid, is sent to wastewater treatment. Process stream information and preliminary equipment summaries are given in Tables B.9.1 and B.9.2. respectively. A utility summary is also provided in Table B.9.3. 

Table B.11.2 Preliminaiy Equipment Summary Table for Heptene Process Unit 1200...

CEPCI (Chemical Engineering Plant Cost Index), 186. 188 corrosive environments, 202-204 cost data, sources of, 182 equipment cost attribute, 182 equipment summary, PFD, 19-20 inflation adjustment, 186-187 manufacturing vessels, 207-208 Marshall and Swift Equipment Cost Index, 186. 188 MOCs (materials of construction), 202-208 module costing technique, 192-193 pressure factors, 197-202 relative costs of metals, 206 weld efficiency, 198 Capitalized cost, 314 Capitalized cost method, 314-316 Carbon steels, equipment cost, 205 Carnot efficiency, 235 Cascade diagrams... 

K-values for formaldehyde/water/methanol system, 1006 major equipment summary, 1004-1006 overview, 1000... 

Makeup water, steam production, 239 maleic anhydride, producing from benzene flow summary, 987 major equipment summary, 988-990 overview, 984... 

Equipment summary— A listing of equipment to be purchased and installed, with specifications, is required. This could be combined with item 4 if the list is not too long. 

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