Bases de diseño

Contents

Chiller Plant Part 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Part 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Part 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Part 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Part 5. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . 21 Part 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Gas Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 MEK/Toluene Preheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Hydrocarbon-Water Phase Separation . . . . . . . . . . . . . . . 31 Naphtha Assay Part 1. . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 35 Part 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Part 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Phase Envelope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Compressor Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Debutanizer . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . 48 Rigorous Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . 53 Two Stage Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Propylene Chlorination Reactor . . . . . . . . . . . . . . . . . . . . 61 Appendix A - Keyword (.INP) Files - English UOM . . . . 67 Appendix B - Keyword (.INP) Files - Metric UOM. . . . . 79Getting Started Workbook

i

Chiller Plant - Part 1




TASK

Through guided practice, you will build a simulation of the process shown below. This is part of a chiller plant typical in natural gas processing. In subsequent parts of this example, you will add other sections of the plant to this simulation.


Figure 4: Schematic of Chiller Plant - Part 1










 

 









  



The process and equipment data are given in Table 3 and 4.
Table 3: Feed Stream Data
Component Nitrogen Carbon dioxide Methane Ethane Propane Total Flowrate Temperature Pressure C6PLUS Properties Mole % 1.0 1.6 72.5 11.5 6.75 4X 107 Component i-Butane n-Butane i-Pentane n-Pentane C6PLUS (PETROComponent) standard vap 50°C 1520 kPa 210ºF 73 99°C Specific Gravity 0.6919 ft3/day 1.0X 106 Mole % 1.25 3.0 0.55 1.10 0.75

normal vap m 3/day

120°F 205 psig NBP API Gravity

2

Chiller Plant - Part 1

Table 4: Equipment Data and Operating Conditions
Unit D-1 C-1 HX-1 Description Scrubber Compressor Cooler Data Temperature Pressure Outlet Pressure Adiabatic Efficiency Hotside: ProcessStream Outlet Temperature Pressure Drop Coldside: Utility Air Inlet Temperature Outlet Temperature 85°F 203 psig 600 psig 72% 110°F 5 psi 80°F 100°F 30°C 1500 kPa 4250 kPa 72% 45°C 35 psi 27°C 38°C

D-2 P-1

Knockout drum Pump

Flash drum with no change of pressure and no duty Outlet Pressure Efficiency 550 psig 65% 3900 kPa 65%




SOLUTION
Step 1 Create a New Simulation
®

SelectNew... from the File menu.

Note that several buttons on the toolbar, including the Run button have red borders. When you have satisfied PRO/II's input requirements all red borders will disappear. Step 2 Build the Process Flow Diagram If the PFD palette is not already visible, click the PFD Palette button on the toolbar to bring it up. Click on the appropriate unit icons on the PFD palette to drawthe PFD. To select and position a unit, just click on its icon. A pointer with a box and flash drum attached appears. Move this to the main window and click again when the unit is in position. In this manner, select and position the units as shown in the diagram using these PFD buttons:

®

Click on the red-bordered Streams on the PFD palette.

Note that the pointer now has an S attached...