By Norman P. Lieberman
ISBN-10: 0470425148
ISBN-13: 9780470425145
The booklet specializes in strategy keep watch over within the petroleum and refinery industries, with an emphasis on challenge fixing. the writer explores numerous actual lifestyles examples and relays the teachings realized from his occupation during this zone. He explains many new but elementary techniques with no using complicated arithmetic. this convenient go-to emphasizes unmarried and well-established approach engineering rules that might support operating engineers and operators swap guide regulate loops to computerized keep an eye on.
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Additional resources for Troubleshooting process plant control
Example text
It strips NH3 in the feed water from 20,000 ppm (2%) down to 20 ppm. Steam flowing through tray 1 to tray 10 does the work of stripping. More steam strips harder and reduces the NH3 content on the stripper bottoms. The question for the Process Control Engineer is how to control three variables: • • • The tower pressure The reflux rate The reboiler steam rate The tower pressure is controlled by the NH3-rich off-gas pressure. This offgas flows to an incinerator. It’s back pressure from the incinerator that controls the stripper pressure.
In 1965, natural gas was essentially free and no one cared about greenhouse gases. In today’s environment no reputable Process Control Engineer should use this archaic method of distillation tower pressure control. REBOILER CONTROLS TOWER PRESSURE Controlling tower pressure by the reboiler duty, as shown in Figure 5-8, is an alternative and quite acceptable variation to flooded condenser pressure Figure 5-8 Head input directly controlling tower pressure is correct design practice equivalent to flooded condenser pressure control 48 DISTILLATION TOWER PRESSURE CONTROL control.
This ratio then controls the flow of steam to the reboiler. Certainly I have just proved that one picture (Fig. 4-3) is worth a thousand words. Study my sketch and reread the above section, because even my mentor, Larry Kunkel, would need a second reading. Champlin Oil is another one of my clients that has expired. They operated a tower at their Corpus Christi Refinery designed to produce propylene. The Figure 4-3 Reboiler steam controlled by reflux, reset by feed rate 34 BINARY DISTILLATION OF PURE COMPONENTS propylene was reacted with benzene to make pseudo-cumene, which ultimately was turned into plastic car bodies.
Troubleshooting process plant control by Norman P. Lieberman
by Joseph
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